CN201517648U - Random recycling check valve - Google Patents
Random recycling check valve Download PDFInfo
- Publication number
- CN201517648U CN201517648U CN2009201216652U CN200920121665U CN201517648U CN 201517648 U CN201517648 U CN 201517648U CN 2009201216652 U CN2009201216652 U CN 2009201216652U CN 200920121665 U CN200920121665 U CN 200920121665U CN 201517648 U CN201517648 U CN 201517648U
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- China
- Prior art keywords
- valve
- main valve
- safety check
- throttling
- main
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- Expired - Fee Related
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- Check Valves (AREA)
Abstract
The utility model relates to a random recycling check valve, wherein a valve body of a main valve is formed through connecting an upper valve body and a lower valve by a middle flange, which is convenient for overlay welding and grinding processing of a valve seat, and has high processing precision. A throttling valve core and a multistage throttling valve seat in a recycling channel to form a spiral streaming angle for match and sealing through a multi-stage series valve core, and the opening of the valve core and the valve seat can be controlled and regulated by a regulating rod and a main valve core. The random recycling check valve has the advantages of excellent close sealing performance, good vibration, low noise, excellent flow regulation performance and the like, and is suitable for being used as recycling check valves for outlets of boiler feed water pumps.
Description
Technical field
The utility model relates to a kind of safety check, particularly about a kind of recirculation safety check that is used for the boiler feed water pump discharge.
Background technique
At the boiler feed water pump discharge, in order to prevent to damage pump equipment,, and gradually in the closed condition process, provide the water pump circulation canal at safety check so safety check is installed in the outlet of water pump to aqueous reflux, prevent the water pump overload operation and burn out.So-called water pump circulation canal by with safety check close and the throttle valve opened is formed this throttle valve and safety check combination title recirculation afterwards safety check.Wherein safety check is called main valve, comprises main valve body, main valve seat, main valve clack, main valve plug; Throttle valve comprises throttle valve body, throttle valve seat, throttling flap, throttle valve lever.Throttle valve lever and main valve plug interlock.Yet, existing recirculation safety check, its main valve body adopts integrative-structure, and main valve seat built-up welding and abrasive machining difficulty are big, and machining accuracy is poor, and main valve is closed poor sealing performance; Throttle valve adopts a valve seat orifice to regulate flow, and again by the restricting orifice decompression, its flow is unadjustable, vibration and noise are big.
Summary of the invention
One of the purpose of this utility model is: a kind of main valve sealing pair easy processing, machining accuracy height are provided, close the safety check of recirculation at random of good airproof performance;
Two of the purpose of this utility model is: provide a kind of throttle valve to regulate flow automatically with the switching process of main valve, vibrate the safety check of recirculation at random little, that noise is low.
The technological scheme that realizes the utility model purpose comprises a main valve, a throttle valve.Main valve is a safety check, comprises main valve body, main valve seat, main valve clack, main valve plug; Throttle valve comprises throttle valve body, throttle valve seat, throttling valve core, adjustable lever; Adjustable lever and main valve plug interlock.The valve body that mainly is safety check is formed by connecting by middle flange by upper valve body and following valve body; Throttling valve core adopts the multistage throttle valve seat formation spiral in plural serial stage spool and the recirculation line to stream the angle fitted seal, and aperture between the two is by adjustable lever and main valve plug interlock regulating and controlling.
One of advantage of the present utility model is that the valve body of safety check is connected by middle flange with following valve body by upper valve body, makes its valve seat built-up welding and abrasive machining easy, machining accuracy height, good seal performance when closing;
Two of advantage of the present utility model is that throttling valve core adopts the multistage throttle valve seat formation spiral in plural serial stage and the recirculation line to stream the angle fitted seal, making medium be able to stable buffering when the plural serial stage spool by recirculation line passes through, reduce vibration and noise, and the aperture between throttling valve core and the throttle valve seat has realized the automatic adjusting of recirculation line flow by adjustable lever and main valve plug interlock adjusting.
Description of drawings
Fig. 1 is a sectional view of the present utility model.
Embodiment
The safety check of recirculation at random as shown in Figure 1 comprises a main valve, a throttle valve.Main valve is a safety check, comprises main valve body, main valve seat, main valve clack 2, main valve plug 7.Main valve body is formed by connecting by middle flange by upper valve body 3 and following valve body 1, is convenient to the processing of valve seat and improves its machining accuracy, and the two ends up and down of main valve plug 7 are installed in the bearing support of upper valve body 3 and following valve body 1.Throttle valve comprises throttle valve body 6, throttle valve seat 8, throttling valve core 5, adjustable lever 10.Throttling valve core 5 adopts the multistage throttle valve seat 8 formation spirals in plural serial stage spool and the recirculation line to stream the angle fitted seal, the formation multistage throttle is regulated, steadily passed through when making the plural serial stage spool of medium by recirculation line, reduced of the direct impact of high speed MEDIA FLOW throttle valve seat 8.Simultaneously, after high-pressure medium streams adjusting through repeatedly little latus rectum, consumed energy and reduce the vibration and noise.By the piston mechanism transmission, piston 9 is connected with throttling valve core 5 between adjustable lever 10 and the throttling valve core 5, and piston rod 4 contacts with adjustable lever 10, and piston body 11 is shaped on several holes 12 and is communicated with main valve chamber and throttling valve pocket.Adjustable lever 10 and main valve plug 7 interlocks, the aperture between throttling valve core 5 and the throttle valve seat 8 is regulated automatically by adjustable lever 10 and main valve plug 7 interlocks, promptly moves on the main valve plug 7 when the safety check aperture is increased, and aperture reduces between throttling valve core 5 and the throttle valve seat 8.Otherwise main valve plug 7 moves down when the safety check aperture is reduced, and aperture increases between throttling valve core 5 and the throttle valve seat 8, and promptly throttle valve opening increases, thereby makes pump discharge pressure keep stable.
Claims (2)
1. a recirculation safety check at random comprises a main valve, a throttle valve, and main valve is a safety check, comprises main valve body, main valve seat, main valve clack (2), main valve plug (7); Throttle valve comprises throttle valve body (6), throttle valve seat (8), throttling valve core (5), adjustable lever (10); Adjustable lever (10) and main valve plug (7) interlock is characterized in that the valve body of safety check is formed by connecting by middle flange by upper valve body (3) and following valve body (1); Throttling valve core (5) adopts multistage throttle valve seat (8) the formation spiral in plural serial stage spool and the recirculation line to stream the angle fitted seal, and aperture between the two is by adjustable lever (10) and main valve plug interlock regulating and controlling.
2. the safety check of recirculation at random according to claim 1 is characterized in that passing through the piston mechanism transmission between adjustable lever (10) and the throttling valve core (5), and piston (9) is connected with throttling valve core (5), and piston rod (4) contacts with adjustable lever (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201216652U CN201517648U (en) | 2009-06-03 | 2009-06-03 | Random recycling check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201216652U CN201517648U (en) | 2009-06-03 | 2009-06-03 | Random recycling check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201517648U true CN201517648U (en) | 2010-06-30 |
Family
ID=42498371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201216652U Expired - Fee Related CN201517648U (en) | 2009-06-03 | 2009-06-03 | Random recycling check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201517648U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537506A (en) * | 2012-02-22 | 2012-07-04 | 浙江德卡控制阀仪表有限公司 | Three-level decompression regulating valve |
| CN107514496A (en) * | 2016-06-17 | 2017-12-26 | 上海弘盛特种阀门制造股份有限公司 | A kind of check valve |
-
2009
- 2009-06-03 CN CN2009201216652U patent/CN201517648U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537506A (en) * | 2012-02-22 | 2012-07-04 | 浙江德卡控制阀仪表有限公司 | Three-level decompression regulating valve |
| CN107514496A (en) * | 2016-06-17 | 2017-12-26 | 上海弘盛特种阀门制造股份有限公司 | A kind of check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100630 Termination date: 20180603 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |