CN205446725U - Leaf spring back pressure type bivalve core control valve - Google Patents
Leaf spring back pressure type bivalve core control valve Download PDFInfo
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- CN205446725U CN205446725U CN201521099093.4U CN201521099093U CN205446725U CN 205446725 U CN205446725 U CN 205446725U CN 201521099093 U CN201521099093 U CN 201521099093U CN 205446725 U CN205446725 U CN 205446725U
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- control valve
- back pressure
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- 238000007789 sealing Methods 0.000 description 5
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- 239000000203 mixture Substances 0.000 description 1
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Abstract
The utility model relates to a leaf spring back pressure type bivalve core control valve. Its characteristics are: including sleeve (3), install big case (4) in this sleeve (3), it is fluted at middle division of this big case (4) top, install little case (9) in this recess, this little case (9) top is connected with valve rod (13). The utility model has the advantages of: by big case, little case, go up voussoir, the leaf spring back pressure type bivalve core structures formed jointly such as voussoir, leaf spring, clamp plate down, formed the pressure balance type system in the upper and lower chambeies of case parts, can reduce the produced unbalance force of control valve, improved the permission pressure differential of control valve, reduced the reliance that the drive was done all can to actuating mechanism, this structure can realize V grades ANSIFCI 70 -2's high -leakage grade under high temperature working condition.
Description
Technical field
This utility model relates to a kind of leaf spring back pressure type dual-spool control valve.
Background technology
Existing single seat control valve structure mainly realizes the control of leakage rate by the valve line close contacting fit between spool and valve seat, owing to producing certain leakage rate at the sealing surface that medium passes through spool and valve seat, if actuator driving force is little, its leakage rate is difficult to meet the requirement of featuring rigid cutting-off.
Utility model content
The purpose of this utility model is to provide a kind of leaf spring back pressure type dual-spool control valve, it is possible to reliably working under high temperature, High Pressure Difference, high-leakage grade operating mode.
A kind of leaf spring back pressure type dual-spool control valve, it is particular in that: include sleeve, is provided with big valve core in this sleeve, has groove at this big valve core crown center, is provided with small valve core in this groove, and this small valve core top is connected with valve rod.
Wherein it is threaded connection between small valve core and valve rod, and is fixed by taper bolt in junction.
The most also including pressing plate, this pressing plate is sleeved on the valve rod on small valve core top and this pressing plate is connected with big valve core by securing member, thus is installed on by small valve core in the groove at big valve core top.
Wherein the cross section of small valve core is T-shaped, and is provided with some vertical through holes at this small valve core top.
At least 2 layers of piston packing ring are wherein installed on the outer wall of big valve core.
At least one leaf spring is wherein installed bottom small valve core, is separately installed with ring-type upper voussoir and ring-type lower wedge block in leaf spring both sides.
The utility model has the advantage of: the leaf spring back pressure type double spool structure collectively constituted by big valve core, small valve core, upper voussoir, lower wedge block, leaf spring, pressing plate etc., define the pressure balance type system in the upper and lower chamber of valve hole part, out-of-balance force produced by control valve can be reduced, improve the permissible pressure of control valve, decrease the dependence to actuator driving force；This structure can realize the high-leakage grade of ANSI/FCI70-2 V grade under worst hot case.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model.
Detailed description of the invention
As it is shown in figure 1, this utility model provides a kind of leaf spring back pressure type dual-spool control valve, including sleeve 3, in this sleeve 3, big valve core 4 is installed, having groove at this big valve core 4 crown center, be provided with small valve core 9 in this groove, this small valve core 9 top is connected with valve rod 13.
Wherein it is threaded connection between small valve core 9 and valve rod 13, and fixed by taper bolt 7 in junction, also include pressing plate 10, this pressing plate 10 is sleeved on the valve rod 13 on small valve core 9 top and this pressing plate 10 is connected with big valve core 4 by securing member, thus is installed in the groove at big valve core 4 top by small valve core 9.
Wherein the cross section of small valve core 9 is T-shaped, and top is provided with several uniform through holes, and they are the parts constituting spool balance system, are metering orifice under small valve core open mode.The outer wall of big valve core 4 is provided with at least 2 layers of piston packing ring 11.Additionally being provided with at least one leaf spring 6 bottom small valve core 9, size and the quantity of leaf spring 6 determine according to nominal dimension and the use condition of valve, and their deformation can make the reciprocating action of small valve core stable, reliable.It is separately installed with voussoir 8 and lower wedge block 5 in leaf spring 6 both sides, they are ring-type, and are connected with mechanical between leaf spring 6, only need to load in groove in order, in small valve core 9 running, leaf spring 6 then deforms in the space of upper voussoir 8 and 5 liang of inclined-plane compositions of lower wedge block.
Embodiment 1:
The shortcoming that this utility model overcomes existing control valve structure, it is provided that a kind of leaf spring back pressure type dual-spool control valve.Use pressure balance type structure, improve the high-leakage grade realizing ANSI/FCI70-2 V grade under permissible pressure, and worst hot case.
This leaf spring back pressure type dual-spool control valve, it includes big valve core 4, small valve core 9, upper voussoir 8, lower wedge block 5, leaf spring 6, pressing plate 10, piston packing ring 11, sleeve 3, valve seat 2, valve body, bonnet, etc..Sleeve 3 is installed on above valve seat 2, is provided with difformity and the metering orifice of arrangement or window, meets different negotiability demands；Big valve core 4 does reciprocating linear motion at sleeve 3 endoporus, and as the opening and closing element of control valve, when moving upward, valve is opened, and when moving to lower end, big valve core 4 compresses valve seat 2 and realizes sealing, and control valve is closed；Big valve core 4 is provided with two-layer groove with sleeve 3 place of cooperation, equipped with two-layer piston packing ring 11, stops medium after sleeve 3 and big valve core 4 gap location leak into valve.
In order to realize control valve balance type structure and higher leakage class (ANSI/FCI70-2 V grade), a groove is set on big valve core 4, small valve core 9 is fixedly installed in this groove by taper bolt 7 with valve rod 13, and compressed by hexagon socket cap head screw 12 by pressing plate 10, small valve core 9 and pressing plate 10 are equipped with some balance pipes.So, when control valve is opened, actuator driving force first acts on small valve core 9, small valve core 9 moves upward, and producing certain gap between big valve core 4, this gap constitutes balance system with the balance pipe on small valve core 9 and pressing plate 10, can balance the pressure of big valve core 4 upper and lower cavity；When control valve is closed, actuator driving force the most first acts on small valve core 9, promotes small valve core 9 to compress big valve core 4 and realizes sealing, has cut off the medium leaked by balance pipe from big valve core 4 epicoele, substantially increased the leakage class of control valve.In order to ensure small valve core 9 in a groove can stable, reliable, certain pressure can be born, below small valve core 9, be respectively mounted voussoir 8, leaf spring 6, lower wedge block 5.
As it is shown in figure 1, this utility model includes big valve core 4, small valve core 9, upper voussoir 8, lower wedge block 5, leaf spring 6, pressing plate 10, piston packing ring 11, sleeve 3, valve seat 2, valve rod 13, taper bolt 7, hexagon socket cap head screw 12 etc. for high temperature, High Pressure Difference, the leaf spring back pressure type dual-spool control valve of high-leakage grade operating mode.
Sleeve 3 is installed on above valve seat 2, is provided with difformity and the metering orifice of arrangement or window, meets different negotiability demands；Big valve core 4 does reciprocating linear motion at sleeve 3 endoporus, and as the opening and closing element of control valve, when moving upward, valve is opened, and when moving to lower end, big valve core 4 compresses valve seat 2 and realizes sealing, and control valve is closed；Big valve core 4 is provided with two-layer groove with sleeve 3 place of cooperation, equipped with two-layer piston packing ring 11, stops medium after sleeve 3 and big valve core 4 gap location leak into valve.
In order to realize control valve balance type structure and higher leakage class (ANSI/FCI70-2 V grade), a groove is set on big valve core 4, small valve core 9 is fixedly installed in this groove by taper bolt 7 with valve rod 13, and compressed by hexagon socket cap head screw 12 by pressing plate 10, small valve core 9 and pressing plate 10 are equipped with some balance pipes.So, when control valve is opened, actuator driving force first acts on small valve core 9, small valve core 9 moves upward, and producing certain gap between big valve core 4, this gap constitutes balance system with the balance pipe on small valve core 9 and pressing plate 10, can balance the pressure of big valve core 4 upper and lower cavity.
When control valve is closed, actuator driving force the most first acts on small valve core 9, promotes small valve core 9 to compress big valve core 4 and realizes sealing, has cut off the medium leaked by balance pipe from big valve core 4 epicoele, substantially increased the leakage class of control valve.In order to ensure small valve core 9 in a groove can stable, reliable, certain pressure can be born, voussoir 8, leaf spring 6, lower wedge block 5 it is respectively mounted below small valve core 9, during small valve core 9 action, actuator driving force acts on leaf spring 6 by small valve core 9 and upper voussoir 8, leaf spring 6 is made to deform in the space that upper voussoir 8,5 liang of inclined-planes of lower wedge block form, this deformation available buffer actuator driving force and medium power, make small valve core 9 stable, reliable.
In this utility model, big valve core 4 is the opening and closing element of control valve, does reciprocating linear motion at sleeve 3 endoporus, and the first that is sealed between valve seat 2 seals；Two-layer piston packing ring 11, between sleeve 3 and big valve core 4, seals as second；Small valve core 9 can compress big valve core 4 under the effect of driving force, it is achieved tight seal, is three seals.When control valve is opened, gap between small valve core 9 and big valve core 4, small valve core 9 metering orifice, pressing plate 10 metering orifice collectively constitute the balance system of spool, can the pressure in the upper and lower chamber of balance valve core parts, reduce out-of-balance force produced by control valve, improve the permissible pressure of control valve；When control valve is closed, small valve core 9 compresses big valve core 4 and realizes tight seal, can cut off the medium leaked from big valve core 4 epicoele by balance pipe, and three seals can realize the high-leakage grade of ANSI/FCI70-2 V grade under control valve high temperature, High Pressure Difference.
Claims (6)
1. a leaf spring back pressure type dual-spool control valve, it is characterized in that: include sleeve (3), big valve core (4) is installed in this sleeve (3), groove is had at this big valve core (4) crown center, being provided with small valve core (9) in this groove, this small valve core (9) top is connected with valve rod (13).
2. a kind of leaf spring back pressure type dual-spool control valve as claimed in claim 1, it is characterised in that: wherein it is threaded connection between small valve core (9) and valve rod (13), and is fixed by taper bolt (7) in junction.
3. a kind of leaf spring back pressure type dual-spool control valve as claimed in claim 1, it is characterized in that: the most also include pressing plate (10), this pressing plate (10) is sleeved on the valve rod (13) on small valve core (9) top and this pressing plate (10) is connected with big valve core (4) by securing member, thus is installed in the groove at big valve core (4) top by small valve core (9).
4. a kind of leaf spring back pressure type dual-spool control valve as claimed in claim 1, it is characterised in that: wherein the cross section of small valve core (9) is T-shaped, and is provided with some vertical through holes at this small valve core (9) top.
5. a kind of leaf spring back pressure type dual-spool control valve as claimed in claim 1, it is characterised in that: at least 2 layers of piston packing ring (11) are wherein installed on the outer wall of big valve core (4).
6. a kind of leaf spring back pressure type dual-spool control valve as described in any one in claim 1 to 5, it is characterized in that: wherein in small valve core (9) bottom, at least one leaf spring (6) is installed, is separately installed with ring-type upper voussoir (8) and ring-type lower wedge block (5) in leaf spring (6) both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521099093.4U CN205446725U (en) | 2015-12-25 | 2015-12-25 | Leaf spring back pressure type bivalve core control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521099093.4U CN205446725U (en) | 2015-12-25 | 2015-12-25 | Leaf spring back pressure type bivalve core control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205446725U true CN205446725U (en) | 2016-08-10 |
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ID=56579574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521099093.4U Active CN205446725U (en) | 2015-12-25 | 2015-12-25 | Leaf spring back pressure type bivalve core control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205446725U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697799A (en) * | 2015-12-25 | 2016-06-22 | 吴忠仪表有限责任公司 | Novel double-valve-element control valve |
| CN110195783A (en) * | 2019-06-04 | 2019-09-03 | 四川长仪油气集输设备股份有限公司 | Piston valve core pressure self-balancing cut-off throttle valve |
| CN119664929A (en) * | 2025-02-20 | 2025-03-21 | 常州高凯电子有限公司 | Valve for improving flow stability and mass flow controller using the same |
-
2015
- 2015-12-25 CN CN201521099093.4U patent/CN205446725U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697799A (en) * | 2015-12-25 | 2016-06-22 | 吴忠仪表有限责任公司 | Novel double-valve-element control valve |
| CN110195783A (en) * | 2019-06-04 | 2019-09-03 | 四川长仪油气集输设备股份有限公司 | Piston valve core pressure self-balancing cut-off throttle valve |
| CN119664929A (en) * | 2025-02-20 | 2025-03-21 | 常州高凯电子有限公司 | Valve for improving flow stability and mass flow controller using the same |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |