CN201215203Y - Safety valve of pipeline dredger - Google Patents
Safety valve of pipeline dredger Download PDFInfo
- Publication number
- CN201215203Y CN201215203Y CNU2008200882399U CN200820088239U CN201215203Y CN 201215203 Y CN201215203 Y CN 201215203Y CN U2008200882399 U CNU2008200882399 U CN U2008200882399U CN 200820088239 U CN200820088239 U CN 200820088239U CN 201215203 Y CN201215203 Y CN 201215203Y
- Authority
- CN
- China
- Prior art keywords
- safety plate
- bonnet
- relief valve
- safety
- valve seat
- 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 - Fee Related
Links
Landscapes
- Safety Valves (AREA)
Abstract
The utility model provides a safety valve for a pipeline dredging device, which comprises a valve seat and a bonnet which are sealed. The safety valve is provided with a safety plate, an air inlet passage is arranged in front of the safety plate of the safety valve, and an air outlet passage is arranged at the rear of the safety plate. The utility model avoids springs, presets the safety threshold through selection of the safety plate, has simple structure and stable and accurate operation.
Description
Technical field
The utility model relates to the relief valve of pipeline drainer.
Background technique
Pipeline drainer with inflator, its principle are for squeezing into pressurized gas in inflator, abrupt release produces impact force and carries out pipe-dredging then.In order to prevent excessively to inflate the danger that produces, the safty device of inflator need be set because of inflator.Safty device in the past, as default insurance threshold values, threshold values is inaccurate with the precompression of spring, and structure is relatively complicated, and, because of making spring fatigue, the pressure frequent variations in the inflator pump influences the proper functioning life-span and the stability of relief valve easily.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of relief valve of pipeline drainer of simple in structure, good stability.For this reason, the utility model by the following technical solutions: it comprises valve seat and bonnet, seals between valve seat and the bonnet, is provided with safety plate in the described relief valve, and described relief valve is provided with gas-entered passageway before safety plate, is provided with outlet passageway after safety plate.Because adopt the technical solution of the utility model, the utility model has been avoided the use spring, the default insurance threshold values of conduct by the selection of safety plate, simple in structure and working stability, accurate.
Description of drawings
Fig. 1 is embodiment's that the utility model provides sectional view.
Embodiment
With reference to accompanying drawing.The utility model comprises valve seat 1 and bonnet 2, be provided with safety plate 3 in the described relief valve, be provided with the positioning step 22 of safety plate in the described bonnet, safety plate is resisted against on the positioning step, is provided with seal ring 4 between safety plate and the valve seat, described bonnet and valve seat are threaded, when mounted, screw bonnet, make safety plate, seal ring compacted, realize sealing between valve seat and the bonnet
Before the safety plate, also be to be provided with gas-entered passageway 11 on the valve seat 1, the inflator pump 5 in the inflator of this gas-entered passageway and pipeline drainer links to each other, after the safety plate, also be that bonnet 2 is provided with outlet passageway 21, this outlet passageway 21 leads to atmosphere, and the air outlet of described outlet passageway is in the sidewall of bonnet.
Safety plate is a kind of thin slice, strut rail is between valve seat 1 and bonnet 2, blocking-up gas-entered passageway 11 and outlet passageway 21, when the air pressure overrate in the inflator pump, it acts on power on the safety plate greater than self intensity of safety plate, and safety plate is broken through by air pressure, and gas-entered passageway 11 and outlet passageway 21 are communicated with, inflator pump leads to atmosphere and pressure release, realizes the security insurance effect.
Claims (5)
1, a kind of relief valve of pipeline drainer is characterized in that it comprises valve seat and bonnet, seals between valve seat and the bonnet, is provided with safety plate in the described relief valve, and described relief valve is provided with gas-entered passageway before safety plate, be provided with outlet passageway after safety plate.
2, the relief valve of a kind of pipeline drainer as claimed in claim 1 is characterized in that described outlet passageway is located on the bonnet, and described gas-entered passageway is located on the valve seat.
3, the relief valve of a kind of pipeline drainer as claimed in claim 1 is characterized in that being provided with in the described bonnet positioning step of safety plate, and safety plate is resisted against on the positioning step, is provided with seal ring between safety plate and the valve seat.
4, the relief valve of a kind of pipeline drainer as claimed in claim 2 is characterized in that the air outlet of described outlet passageway is in the sidewall of bonnet.
5,, it is characterized in that described bonnet and valve seat are threaded as the relief valve of claim 1,2,3 or 4 described a kind of pipeline drainers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200882399U CN201215203Y (en) | 2008-06-04 | 2008-06-04 | Safety valve of pipeline dredger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200882399U CN201215203Y (en) | 2008-06-04 | 2008-06-04 | Safety valve of pipeline dredger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201215203Y true CN201215203Y (en) | 2009-04-01 |
Family
ID=40520407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200882399U Expired - Fee Related CN201215203Y (en) | 2008-06-04 | 2008-06-04 | Safety valve of pipeline dredger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201215203Y (en) |
-
2008
- 2008-06-04 CN CNU2008200882399U patent/CN201215203Y/en not_active Expired - Fee Related
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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: 20090401 Termination date: 20110604 |