CN203979763U - The multistage current-limiting apparatus of porous - Google Patents
The multistage current-limiting apparatus of porous Download PDFInfo
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- CN203979763U CN203979763U CN201420272160.7U CN201420272160U CN203979763U CN 203979763 U CN203979763 U CN 203979763U CN 201420272160 U CN201420272160 U CN 201420272160U CN 203979763 U CN203979763 U CN 203979763U
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- restriction orifice
- multistage
- limiting apparatus
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- porous
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Abstract
The utility model discloses the multistage current-limiting apparatus of a kind of porous, this current-limiting apparatus comprises shell and sets gradually multistage restriction orifice in the enclosure, described multistage restriction orifice comprises and is arranged on the first order restriction orifice of fluid inlet end and follow-up restriction orifice more than two-stage at least, the front end of each follow-up restriction orifice is provided with support annulus, each support annulus is threaded connection with the restriction orifice of previous stage respectively, and multistage restriction orifice is interconnected to form an overall structure; On described first order restriction orifice and follow-up restriction orifice, be equipped with multiple metering holes.Adopt current-limiting apparatus of the present utility model, can avoid vibration and wearing and tearing between multistage restriction orifice, simple in structure, easily manufacture and install.
Description
Technical field
The utility model relates to equipment conventional in nuclear power plant technique fluid system, is specifically related to the multistage current-limiting apparatus of a kind of porous.
Background technique
Restriction orifice is the common equipment in process fluid system, and due to the difference of operating conditions, system operated by rotary motion various ways restriction orifice, mainly can be divided into single-stage orifice plate and the large class of multistage orifice plate two.Multistage orifice plate is applicable to more harsh operating conditions, and technology content is higher.
The multistage restriction orifice of porous that nuclear power station adopts at present mainly contains two kinds of structures.The multistage restriction orifice of the first structure, all adopts and is welded to connect between at different levels, and weld seam is more, has increased workload and the risk of leakage of inservice inspection.
The restriction orifice of the second structure, is packaging multi-stage porous plate structure, orifice plate assemblings at different levels, then shell is welded to connect, although reduce weld seam, due to the impact of foozles at different levels and the effect of expanding with heat and contract with cold in service, cause orifice plate vibrations at different levels, wear and tear more serious.
Model utility content
For the defect existing in prior art, the purpose of this utility model is: provide a kind of porous multipole current-limiting apparatus, can solve because weld seam between multistage restriction orifice is many, cause leakage, or because of foozle, cause the problem of vibration abrasion between orifice plates at different levels.
For achieving the above object, the technical solution adopted in the utility model is as follows: provide a kind of porous multistage current-limiting apparatus, this current-limiting apparatus comprises shell and sets gradually multistage restriction orifice in the enclosure, described multistage restriction orifice comprises and is arranged on the first order restriction orifice of fluid inlet end and follow-up restriction orifice more than two-stage at least, the front end of each follow-up restriction orifice is provided with support annulus, each support annulus is threaded connection with the restriction orifice of previous stage respectively, makes multistage restriction orifice form an overall structure; On described first order restriction orifice and follow-up restriction orifice, be respectively equipped with multiple metering holes.
Further, described first order restriction orifice is vertical disk, and follow-up restriction orifice is spill disk.
Further, the coupled support annulus of each described spill disk is an overall structure.
Further, the metering hole on described first order restriction orifice and the metering hole on follow-up restriction orifice are located on different radiuses.
Further, described shell adopts full-bore structure.
The beneficial effects of the utility model are:
(1) the utility model is provided with the multistage restriction orifice of porous in housing, after the multistage restriction orifice of described porous connects, forms an overall structure, has avoided vibrations at different levels and wearing and tearing;
(2) multistage restriction orifice of the present utility model can carry out according to pressure drop the adjustment of sum of series hole count;
(3) first order restriction orifice is vertical disk, without supporting annulus, saves material; Follow-up restriction orifice is spill disk, and the connected support annulus of this spill disk is an overall structure, reduces number of spare parts, cost-saving;
(4) shell adopts full-bore structure, when reality is debugged at the scene, can adjust the aperture of on-the-spot first order restriction orifice and afterbody restriction orifice, ensures the pressure drop of multistage restriction orifice, simple to operate.
Brief description of the drawings
Fig. 1 is the structural representation of the multistage current-limiting apparatus of the utility model porous.
Embodiment
Below in conjunction with Figure of description, embodiment of the present utility model is described in further details.
As shown in Figure 1, be the multistage current-limiting apparatus of porous that the utility model provides, this current-limiting apparatus comprises shell 1 and is successively set on the multistage restriction orifice in shell 1.Wherein, shell 1 is welded by two-part, is convenient to the installation of multistage restriction orifice; Multistage restriction orifice comprises and is arranged on the first order restriction orifice 2 of fluid inlet end and follow-up restriction orifice 3 more than two-stage at least, one end of each follow-up restriction orifice 3 is provided with supports annulus 4, each support annulus 4 is threaded connection with the restriction orifice of its previous stage, makes multistage restriction orifice form an overall structure.The current-limiting apparatus that the utility model provides, adopts and is threaded between restriction orifices at different levels, avoids in the first prior art because adopting welding manner to connect, and weld seam is more, increases the workload and the disclosure risk that check; Also avoid the impact due to restriction orifice foozles at different levels and the effect of expanding with heat and contract with cold in service existing in the second prior art, caused orifice plate vibration and wearing and tearing.
In order to adjust fluid flow, on first order restriction orifice 2 and follow-up restriction orifice 3, be respectively equipped with multiple metering holes 5, metering hole on metering hole on first order restriction orifice 2 and follow-up restriction orifice 3 is located on different radiuses, is convenient to adjust the pressure drop of current-limiting apparatus.
First order restriction orifice 2 is vertical disk, without supporting annulus, saves material; Follow-up restriction orifice 3 is spill disk, and the connected support annulus of each spill disk is a solid forging, has reduced the quantity of part.
Shell 1 adopts full-bore structure, when reality is debugged at the scene, if need to adjust the pressure drop of multistage restriction orifice, can adjust the aperture of first order restriction orifice or afterbody restriction orifice at the scene, easy to operate.
The multistage restriction orifice that the utility model provides can carry out step pressure reducing, and the quantity of metering hole on the quantity of multistage orifice plate and every grade of orifice plate can increase or reduce according to fluid-pressure drop, flexibly practical, simple in structure, easily manufactures and installs.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if these amendments of the present utility model and within modification belongs to the scope of the utility model claim and equivalent technology thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (5)
1. the multistage current-limiting apparatus of porous, this current-limiting apparatus comprises shell (1) and is successively set on the multistage restriction orifice in shell (1), it is characterized in that: described multistage restriction orifice comprises and is arranged on the first order restriction orifice (2) of fluid inlet end and follow-up restriction orifice (3) more than two-stage at least, the front end of each follow-up restriction orifice (3) is provided with and supports annulus (4), each support annulus (4) is threaded connection with previous stage restriction orifice respectively, makes multistage restriction orifice form an overall structure; Wherein, on first order restriction orifice (2) and follow-up restriction orifice (3), be respectively equipped with multiple metering holes (5).
2. the multistage current-limiting apparatus of porous as claimed in claim 1, is characterized in that: described first order restriction orifice (2) is vertical disk, and follow-up restriction orifice (3) is spill disk.
3. the multistage current-limiting apparatus of porous as claimed in claim 2, is characterized in that: the coupled support annulus (4) of each described spill disk is an overall structure.
4. the multistage current-limiting apparatus of porous as claimed in claim 3, is characterized in that: the metering hole (5) on metering hole (5) and follow-up restriction orifice (3) on described first order restriction orifice (2) is located on different radiuses.
5. the multistage current-limiting apparatus of porous as described in claim 1-4 any one, is characterized in that: described shell (1) adopts full-bore structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420272160.7U CN203979763U (en) | 2014-05-26 | 2014-05-26 | The multistage current-limiting apparatus of porous |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420272160.7U CN203979763U (en) | 2014-05-26 | 2014-05-26 | The multistage current-limiting apparatus of porous |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203979763U true CN203979763U (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420272160.7U Expired - Fee Related CN203979763U (en) | 2014-05-26 | 2014-05-26 | The multistage current-limiting apparatus of porous |
Country Status (1)
| Country | Link |
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| CN (1) | CN203979763U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022813A (en) * | 2019-12-03 | 2020-04-17 | 四川大学 | Porous current-limiting noise-reducing pore plate and current-limiting noise reducer formed by same |
| CN111828529A (en) * | 2020-07-20 | 2020-10-27 | 中国商用飞机有限责任公司 | Buffer for aircraft tail skid |
-
2014
- 2014-05-26 CN CN201420272160.7U patent/CN203979763U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022813A (en) * | 2019-12-03 | 2020-04-17 | 四川大学 | Porous current-limiting noise-reducing pore plate and current-limiting noise reducer formed by same |
| CN111022813B (en) * | 2019-12-03 | 2021-08-03 | 四川大学 | Porous current-limiting noise-reducing pore plate and current-limiting noise reducer formed by same |
| CN111828529A (en) * | 2020-07-20 | 2020-10-27 | 中国商用飞机有限责任公司 | Buffer for aircraft tail skid |
| CN111828529B (en) * | 2020-07-20 | 2022-02-22 | 中国商用飞机有限责任公司 | Buffer for aircraft tail skid |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20210526 |