CN203847725U - Novel control valve with double valve elements - Google Patents
Novel control valve with double valve elements Download PDFInfo
- Publication number
- CN203847725U CN203847725U CN201420197165.8U CN201420197165U CN203847725U CN 203847725 U CN203847725 U CN 203847725U CN 201420197165 U CN201420197165 U CN 201420197165U CN 203847725 U CN203847725 U CN 203847725U
- Authority
- CN
- China
- Prior art keywords
- valve
- control valve
- coupling shaft
- spring
- novel control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012856 packing Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims description 33
- 238000010168 coupling process Methods 0.000 claims description 33
- 238000005859 coupling reaction Methods 0.000 claims description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Lift Valve (AREA)
Abstract
The utility model provides a novel control valve with double valve elements. The novel control valve comprises a valve body, bearings, a connecting shaft, a spring, teeth and a valve stem. Flanges are connected to two ends of the valve body, each bearing is arranged in the center of the corresponding valve element, the connecting shaft sleeves the outer surfaces of the two bearings, the two bearings are connected with the spring, the teeth are arranged among the valve elements and sealing packing, the valve stem is connected with the connecting shaft, two valve seats are respectively mounted in an inlet channel and an outlet channel of the valve body, and the valve stem is connected to the center of the connecting shaft. The novel control valve has the advantages that the front and the back of the valve are sealed, contact force among the valve elements and the packing is increased by the aid of the spring, sealing areas are enlarged by the aid of the teeth, and accordingly the sealing performance can be greatly improved; double flow stop effects are realized for media by the two valve elements, and accordingly the work performance of the novel control valve is superior to the work performance of a common control valve when the novel control valve is used as a regulating valve under the working conditions of high differential pressures; the length of the connecting shaft is equal to the nominal diameter of a pipeline, accordingly, influence of the valve elements on circulation of the media when the valve is fully opened can be prevented, and the novel control valve is low in pressure loss.
Description
Technical field
The utility model belongs to valve field, especially relates to a kind of new-type double-valve core control valve.
Background technique
Valve is widely used in the every field of chemical industry as actuator, purposes, can be divided into modulating valve and switch valve, wherein the use of straight-through single-seat valve, butterfly valve and ball valve is very extensive, and straight-through single-seat valve can only be used for clean fluid, the little occasion of front and back differential pressure; Butterfly valve is widely used in bigbore pipeline, but poor sealing; Though sealing property of ball valves is good, adjusting function extreme difference.
Double spool control valve combines the feature of above three kinds of valves, and sealing is good, has good adjusting function, also can be applicable to measure thickness, crystallization, contains solid particle and the larger operating mode of differential pressure.Double spool control valve can be considered the extension of common butterfly valve, has improved some performances of common butterfly valve, but how to have sealed and be still research emphasis between spool and valve seat.In addition,, because two spools are around valve rod integral-rotation, the more common butterfly valve of the volume of valve body can be larger; The Economy that can find out double spool control valve valve from valve materials is poor.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of new-type double-valve core control valve, especially rational in infrastructure, the new-type double-valve core control valve that sealability improves greatly.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of new-type double-valve core control valve, comprise that two ends are connected with the valve body of flange, be located at two spools that shape is identical in valve body, connect the coupling shaft between two spools, the valve rod being connected with coupling shaft, one valve seat is installed respectively in the inlet passage of valve body and outlet passage, two spools cooperatively interact with two valve seats respectively, the crossover location of described valve rod and coupling shaft is provided with a spring, nested one section of bearing being connected with spring all in the coupling shaft of spring both sides, described spool, between valve seat and valve body, insert stuffing box packing, between spool and stuffing box packing, pass through the tight interlock of teeth.
Further, described valve rod is connected with the midpoint of coupling shaft, and the length of described coupling shaft equals pipeline inside nominal diameter, and the sealing surface of described valve body both sides is circular arc.
Further, described bearing is located at respectively the center of the coupling shaft of spring both sides.
Further, described stuffing box packing is teflon or Expanded graphite.
Advantage and the good effect that the utlity model has are:
1, before and after valve, all have sealing, spring, in high compression state, can make to produce stronger power between two spools and two valve seats, and the filler between spool and valve seat and valve body contacts by teeth, increases sealing area, and sealability improves greatly.
2,, because two spools carry out twice choked flow to medium, the more common butterfly valve of service behaviour during as modulating valve under large differential pressure operating mode is more outstanding.
3, the length of coupling shaft equals pipeline inside nominal diameter, and when valve wide open, spool does not affect the circulation of medium, and the pressure loss is less.
Brief description of the drawings
Fig. 1 is the structural representation of described new-type double-valve core control valve;
Fig. 2 is the plan view of described new-type double-valve core control valve;
In figure:
1, flange 2, spool 3, valve rod
4, coupling shaft 5, valve seat 6, valve body
7, bearing 8, spring 9, stuffing box packing
10, teeth
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is illustrated:
As shown in Figure 1, 2, a kind of new-type double-valve core control valve, formed by valve body 6, flange 1, two spools 2, two valve seats 5, bearing 7, spring 8, coupling shaft 4, stuffing box packing 9, teeth 10 and valve rods 3, valve body 6 two ends are connected with flange 1, in valve body, two spool 2 shapes are identical, one valve seat 5 is installed respectively in the inlet passage of valve body 6 and outlet passage, two spools 2 cooperatively interact with two valve seats 5 respectively, valve rod 3 is connected with coupling shaft 4, drives coupling shaft 4 that two spools 2 are rotated by valve rod 3.
Valve rod 3 and the crossover location of coupling shaft 4 are provided with the spring 8 of a high compression, nested one section of bearing 7 being connected with spring 8 all in the coupling shaft 4 of spring 8 both sides, and coupling shaft 4 is enclosed within the outside of two bearings 7.
Between spool 2, valve seat 5 and valve body 6, insert stuffing box packing 9, between spool 2 and stuffing box packing 9, pass through the tight interlock of teeth 10.
The length of coupling shaft 4 was both unsuitable long also unsuitable too short, was with movable valve plug 2 and can carries out 90 degree rotations due to coupling shaft 4, and the long one side of coupling shaft 4 can cause valve body 6 volumes excessive, can cause on the other hand running torque excessive; The too short meeting of coupling shaft 4 causes the minimizing of medium circulation area after valve open, and therefore the length of coupling shaft 4 equals pipeline inside nominal diameter (claiming again mean outside diameter) for the most suitable.
The internal diameter of coupling shaft 4 equals the external diameter of bearing 7, and coupling shaft 4 is nested in the outside of bearing 7, there is no direct physical connection.The outer surface of the internal surface of coupling shaft 4 and bearing 7 also can be processed into special shape, so that better nested.
Valve rod 3 and the tie point of coupling shaft 4 are located at the midpoint of coupling shaft 4, are also the mid points of spring 8 simultaneously, otherwise can cause a side valve core 2 in medium circulating face when valve open.
Spring 8 should be in high compression state, and the elastic force under spring 5 compressive states is larger, stressed larger between spool 2 and valve seat 5, and sealability is better.
As shown in Figure 2, spool 2 is circular arc with stuffing box packing 9, can make spool 2 carry out 90 degree rotations along teeth 10, can keep again sealing, and valve body 6 has enough spaces to make two spools 2 at internal rotating.
Between spool 2 and valve body 6, insert stuffing box packing 9, to improve sealability, stuffing box packing 9 is teflon or Expanded graphite.
Double spool control valve provides retrocession for sealing: in the time of valve complete shut-down, formed two seals after and before the valve by two spools 2 and two valve seats 5, this is first insurance; Stuffing box packing 9 is with spool 2 by teeth 10 interlocks, and the quantity of teeth 10 is more, and the degree of depth is darker, and sealing area is also just larger, and this is second insurance; Spring 8 has increased stressed between spool 2 and stuffing box packing 5, makes the tight interlock of teeth 10, these Wei tri-roads insurances.In valve regulated process, two spools 2 have carried out twice choked flow to circulation medium, are specially adapted to the operating mode of large differential pressure; In the time of valve wide open, only have coupling shaft 4 to carry out choked flow, cause crushing less; In addition, double spool is on the basis of common butterfly valve, to derive from and come, and has inherited the adjusting function of common butterfly valve.In sum, double spool control valve combines the advantage of straight-through single-seat valve, ball valve and butterfly valve, more extensive to the Applicable scope of operating mode, has good prospect of the application.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variation and improvement etc. of doing according to the utility model application range, within all should still belonging to patent covering scope of the present utility model.
Claims (4)
1. a new-type double-valve core control valve, comprise that two ends are connected with the valve body of flange (1) (6), be located at the identical spool (2) of two shapes in valve body (6), connect the coupling shaft (4) between two spools (2), the valve rod (3) being connected with coupling shaft (4), one valve seat (5) is installed respectively in the inlet passage of valve body (6) and outlet passage, two spools (2) cooperatively interact with two valve seats (5) respectively, it is characterized in that: described valve rod (3) is provided with a spring (8) with the crossover location of coupling shaft (4), nested one section of bearing (7) being connected with spring (8) all in the coupling shaft (4) of spring (8) both sides, described spool (2), between valve seat (5) and valve body (6), insert stuffing box packing (9), between spool (2) and stuffing box packing (9), pass through closely interlock of teeth (10).
2. new-type double-valve core control valve according to claim 1, it is characterized in that: described valve rod (3) is connected with the midpoint of coupling shaft (4), the length of described coupling shaft (4) equals pipeline inside nominal diameter, and the sealing surface of described valve body (6) both sides is circular arc.
3. new-type double-valve core control valve according to claim 1 and 2, is characterized in that: described bearing (7) is located at respectively the center of the coupling shaft (4) of spring (8) both sides.
4. new-type double-valve core control valve according to claim 3, is characterized in that: described stuffing box packing (9) is teflon or Expanded graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197165.8U CN203847725U (en) | 2014-04-22 | 2014-04-22 | Novel control valve with double valve elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197165.8U CN203847725U (en) | 2014-04-22 | 2014-04-22 | Novel control valve with double valve elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203847725U true CN203847725U (en) | 2014-09-24 |
Family
ID=51560745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420197165.8U Expired - Lifetime CN203847725U (en) | 2014-04-22 | 2014-04-22 | Novel control valve with double valve elements |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203847725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110337868A (en) * | 2019-07-22 | 2019-10-18 | 中国石油大学胜利学院 | A kind of agriculture spray seeding device of automation |
-
2014
- 2014-04-22 CN CN201420197165.8U patent/CN203847725U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110337868A (en) * | 2019-07-22 | 2019-10-18 | 中国石油大学胜利学院 | A kind of agriculture spray seeding device of automation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140924 |