CN201818861U - Vacuum speed control valve - Google Patents
Vacuum speed control valve Download PDFInfo
- Publication number
- CN201818861U CN201818861U CN2010205378292U CN201020537829U CN201818861U CN 201818861 U CN201818861 U CN 201818861U CN 2010205378292 U CN2010205378292 U CN 2010205378292U CN 201020537829 U CN201020537829 U CN 201020537829U CN 201818861 U CN201818861 U CN 201818861U
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- Prior art keywords
- fixed
- throttling
- valve body
- valve
- screw bolt
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- Expired - Fee Related
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Abstract
The utility model provides a vacuum speed control valve, which comprises a valve body. A fixed differential reducing valve cavity and a throttling valve cavity which are transversely through are longitudinally arranged on the valve body. An air inlet nozzle is fixed to the front end of the fixed differential reducing valve cavity, a plunger is disposed below the air inlet nozzle, a spring is arranged at the bottom of the plunger, the bottom of the spring is connected with an adjusting bolt, a sealing sleeve covers the outside of the adjusting bolt, the rear parts of the adjusting bolt and the seal sleeve are both fixed to the valve body, an air outlet nozzle is fixed to the front end of the throttling valve cavity, a throttling spool is disposed on the lower portion of the air outlet nozzle, an O-shaped ring is arranged at the front end of the throttling spool, a sealing sleeve covers the outside of the throttling spool, and the rear parts of the throttling spool and the sealing sleeve are both fixed to the valve body. The vacuum speed control valve realizes equal-flow sampling, and accommodates the sampling requirement under atmospheric or flue gas sampling conditions, flow change due to external environment change during sampling is reduced, and accuracy and reliability of detection data are guaranteed.
Description
Technical field
The utility model relates to a kind of series flow control valve, relates to a kind of vacuum series flow control valve specifically, belongs to the environmental monitoring technology field.
Background technique
Instrument is when carrying out atmosphere or flue gas sampling, generally provide power by negative pressure pump, for the ease of the calculating sampling volume, sampling needs constant flow usually, and common isokinetic sampling's measure is, flowmeter is installed in sample path, the electrical signal of the information of changes in flow rate is fed back to control circuit, again motor is carried out speed governing, adopt the common speed governing error ratio of this control mode bigger, and have a hysteresis, uniform flow DeGrain.
Therefore, by adjusting and improving structure, series flow control valve is implemented in carries out work under the negative pressure state, with the sampling request under suitable and atmosphere or the flue gas sampling condition, the changes in flow rate that causes because of the variation of external environment when reducing sampling, traffic samplings such as realization are the technical problems that needs to be resolved hurrily.
Summary of the invention
At the deficiencies in the prior art, the technical problems to be solved in the utility model is, traffic samplings such as a kind of vacuum series flow control valve realization are provided, be applicable to the sampling request under atmosphere or the flue gas sampling condition, the changes in flow rate that causes because of the variation of external environment when reducing sampling guarantees to detect the accuracy and the reliability of data.
For solving the problems of the technologies described above, the technological scheme that the utility model adopted is, a kind of vacuum series flow control valve, and it comprises valve body, and Fixed differential reducing valve cavity and throttle valve cavity two-part of lateral direction penetrating vertically are set on the valve body; Fixed differential reducing valve cavity front end is air inlet nozzle fixedly, and the air inlet nozzle below is provided with plunger, and plunger base is provided with spring, and the spring bottom is connected with the adjustment double-screw bolt, adjusts the outside stuffing box gland that coats of double-screw bolt, adjusts double-screw bolt and stuffing box gland rear portion and all is fixed on the valve body; Throttle valve cavity front end is fixed with outlet nozzle, and the outlet nozzle bottom is provided with throttling valve core, and the throttling valve core front end is provided with O type circle, the outside stuffing box gland that coats of throttling valve core, and throttling valve core and stuffing box gland rear portion all are fixed on the valve body.
Above-mentioned vacuum series flow control valve, its stuffing box gland bottom is fixed on the valve body by pressing nut, adjusts double-screw bolt and throttling valve core and all passes the pressure nut, adjusts double-screw bolt and throttling valve core tail end and all is fixed on the pressure nut by locking nut.
The utlity model has following useful technique effect and advantage, be applicable to atmosphere or flue gas sampling, under negative pressure, carry out flow control, widened the application area of series flow control valve; Traffic samplings such as realization, the changes in flow rate that causes because of the variation of external environment when reducing sampling realizes the uniform flow sampling, guarantees to detect the accuracy and the reliability of data.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in the figure, the vacuum series flow control valve of present embodiment, it comprises valve body 1, and the Fixed differential reducing valve cavity 13 and throttle valve cavity 14 two-part of lateral direction penetrating vertically is set on the valve body 1; Fixed differential reducing valve cavity 13 front ends are air inlet nozzle 11 fixedly, air inlet nozzle 11 belows are provided with plunger 2, plunger 2 bottoms are provided with spring 3, spring 3 bottoms are connected with adjustment double-screw bolt 5, adjust the double-screw bolt 5 outside stuffing box glands 4 that coat, stuffing box gland 4 bottoms are fixed on the valve body 1 by pressing nut 6, adjust double-screw bolt 5 and pass pressure nut 6, adjust double-screw bolt 5 and are fixed on the pressure nut 6 by locking nut 7.Throttle valve cavity 14 front ends are fixed with outlet nozzle 10, outlet nozzle 10 bottoms are provided with throttling valve core 8, throttling valve core 8 front ends are provided with O type circle 9, the throttling valve core 8 outside stuffing box glands 4 that coat, stuffing box gland 4 bottoms are fixed on the valve body 1 by pressing nut 6, throttling valve core 8 is passed and is pressed nut 6, and throttling valve core 8 tail ends all are fixed on by locking nut 7 and press on the nut 6.
The above, only be to preferred embodiment of the present utility model, be not to be that the utility model is done other forms of restriction, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection domain of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (2)
1. a vacuum series flow control valve is characterized in that it comprises valve body, and Fixed differential reducing valve cavity and throttle valve cavity two-part of lateral direction penetrating vertically are set on the valve body; Fixed differential reducing valve cavity front end is air inlet nozzle fixedly, and the air inlet nozzle below is provided with plunger, and plunger base is provided with spring, and the spring bottom is connected with the adjustment double-screw bolt, adjusts the outside stuffing box gland that coats of double-screw bolt, adjusts double-screw bolt and stuffing box gland rear portion and all is fixed on the valve body; Throttle valve cavity front end is fixed with outlet nozzle, and the outlet nozzle bottom is provided with throttling valve core, and the throttling valve core front end is provided with O type circle, the outside stuffing box gland that coats of throttling valve core, and throttling valve core and stuffing box gland rear portion all are fixed on the valve body.
2. vacuum series flow control valve according to claim 1, it is characterized in that: described stuffing box gland bottom is fixed on the valve body by pressing nut, adjust double-screw bolt and throttling valve core and all pass the pressure nut, adjust double-screw bolt and throttling valve core tail end and all be fixed on the pressure nut by locking nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205378292U CN201818861U (en) | 2010-09-21 | 2010-09-21 | Vacuum speed control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205378292U CN201818861U (en) | 2010-09-21 | 2010-09-21 | Vacuum speed control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201818861U true CN201818861U (en) | 2011-05-04 |
Family
ID=43916813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205378292U Expired - Fee Related CN201818861U (en) | 2010-09-21 | 2010-09-21 | Vacuum speed control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201818861U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533866A (en) * | 2015-01-15 | 2015-04-22 | 浙江海宏液压科技股份有限公司 | Hydraulic speed regulating valve |
-
2010
- 2010-09-21 CN CN2010205378292U patent/CN201818861U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533866A (en) * | 2015-01-15 | 2015-04-22 | 浙江海宏液压科技股份有限公司 | Hydraulic speed regulating valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20120921 |