CN202955222U - Sealing device - Google Patents
Sealing device Download PDFInfo
- Publication number
- CN202955222U CN202955222U CN 201220684438 CN201220684438U CN202955222U CN 202955222 U CN202955222 U CN 202955222U CN 201220684438 CN201220684438 CN 201220684438 CN 201220684438 U CN201220684438 U CN 201220684438U CN 202955222 U CN202955222 U CN 202955222U
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- CN
- China
- Prior art keywords
- sealing
- device body
- packing
- seal
- seal cavity
- 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
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Abstract
The utility model relates to the field of auxiliaries of desulfuration systems of power stations, and particularly discloses a sealing device with a better sealing effect. According to the technical scheme, the sealing device comprises a sealing piece, sealing filler and a device body, wherein the sealing filler is positioned in a space surrounded by the device body and the sealing piece; the device body is internally provided with a seal cavity, and the sealing filler is positioned between the seal cavity and the external atmosphere; and the seal cavity is provided with a compressed air interface, and is sealed by the sealing piece which is inserted in the device body. The outlet of the seal cavity is blocked by the sealing piece, one side, which is close to the external atmosphere, of the outlet is sealed by the sealing filler, and a material leaks, and thus the abrasion of the sealing filler and environment pollution, which are caused by material leakage, can be avoided. The sealing device provided by the utility model is widely applied to occasions that a system needs to be sealed when operating under a positive pressure condition.
Description
Technical field
The utility model relates to desulphurization system auxiliary field, power station, especially a kind of seal arrangement.
Background technique
In the material conveying process of power station desulphurization system, need to guarantee that intrasystem pressure is lower than external atmospheric pressure, namely system pressure is negative pressure, the material that can avoid like this carrying is leaked to ambient atmosphere and befouling environment.But when the use of reality, the negative pressure in the desulphurization system is often unstable, unusual malleation occurs sometimes, and namely intrasystem pressure is higher than external atmospheric pressure, thereby can cause the leakage of material.The filling mouth increase dress seal arrangement that under these circumstances, generally can be chosen in material reduces the leakage that material occurs because of unusual malleation.
Traditional seal arrangement is installed on the filling mouth of material, is by sealing in the device body that stops up screw plug and enter to be filled with packing.Material owing to the appearance of system's malleation is revealed can be piled up between the packing of conventional seals device.The obstruction head of sealing device can repeatedly be opened in order to fill or to change packing, therefore in use for some time, the material wearing and tearing that packing revealed can appear in traditional seal arrangement, the problem that the sealability of device descends, thus be difficult to guarantee the effect that seals.
The model utility content
Technical problem to be solved in the utility model provides a kind of seal arrangement that better sealing effect is arranged.
The technological scheme that its technical problem that solves the utility model adopts is: seal arrangement, comprise Sealing, packing and device body, packing is positioned at the space that device body and Sealing surround, be provided with Seal cage in the device body, packing is between Seal cage and ambient atmosphere, be provided with compressed air interface on the Seal cage, the Sealing that Seal cage is inserted in the device body seals.
Further be, comprise nockbush, nockbush and packing are adjacent and be positioned at a side near Seal cage.
Further be, comprise packing gland, packing gland with packing_seal in the space that device body and Sealing surround.
The beneficial effects of the utility model are: by Seal cage is set, extraneous pressurized air can be transported to Seal cage by compressed air interface, makes the interior gas pressure of its Seal cage all the time greater than device interior pressure.Because the outlet of Seal cage is blocked by Sealing, and the outlet port is lived by packing_seal near a side of ambient atmosphere, therefore most pressurized gass only can be toward a side that does not have packing_seal, the internal system that is conveying material goes to reveal, thereby the material of avoiding occurring because of the system exception malleation is revealed the pollution that brings packing, increase sealing effect, extension fixture working life.The occasion that need to seal system when the utility model can be widely used in working under system's band barotropic condition.
Description of drawings
Fig. 1 is sectional view of the present utility model.
Be labeled as among the figure: Sealing 1, packing 2, Seal cage 3, nockbush 4, compressed air interface 5, packing gland 6, device body 7, fixed pedestal 8.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Seal arrangement as shown in Figure 1, comprise Sealing 1, packing 2 and device body 7, packing 2 is positioned at the space that device body 7 and Sealing 1 surround, be provided with Seal cage 3 in the device body 7, packing 2 is between Seal cage 3 and ambient atmosphere, be provided with compressed air interface 5 on the Seal cage 3, the Sealing 1 that Seal cage 3 is inserted in the device body 7 seals.
Specific to seal arrangement sectional view shown in Figure 1, the left side of seal arrangement is the desulphurization system environment, and the right side is the ambient atmosphere environment, and seal arrangement is installed on the fixed pedestal 8.Do not have Seal cage 3 in traditional seal arrangement, produce sometimes unusual high pressure in the desulphurization system, the system internal pressure of making is higher than external atmospheric pressure, i.e. intrasystem malleation, thus cause its inner material to leak from seal arrangement with malleation.The utility model is by arranging Seal cage 3, the compressed air delivery in the external world is arrived Seal cage 3, form one all the time greater than the malleation of system pressure at Seal cage 3, even arranging like this guarantees to have produced unusual high pressure in the desulphurization system, this abnormal pressure also is lower than the pressure of the pressurized gas of Seal cage 3 inside, make in its gas seal chamber and remain malleation, prevent that material is to external leakage.The outlet of Seal cage 3 is blocked by Sealing 1, and also have packing 2 to seal in the side away from desulphurization system, therefore only need the pressurized gas of the suitable pressure of input, just can be when guaranteeing that pressurized gas can not leak into the desulphurization system outside in a large number, can guarantee that again gas seal intracavity gas pressure at every moment is higher than the pressure in the desulphurization system, guarantees that namely gas seal intracavity gas pressure is all the time greater than internal system pressure.Sealing 1 need to block the outlet on the Seal cage 3 fully, leaks in a large number the system outside to avoid pressurized gas, guarantees that Seal cage 3 internal pressures are unlikely to owing to a large amount of the leakage reduced.
In order to make near the sealing effect the packing 2 better, can select such scheme: comprise nockbush 4, nockbush 4 and packing 2 are adjacent and be positioned at a side near Seal cage 3.By the side at next-door neighbour's packing 2 and close Seal cage 3 the more excellent nockbush of sealing effect 4 is set, can improve greatly the performance of seal compression gas, guarantee that pressurized gas can not be leaked to ambient atmosphere, thereby also guarantee gas seal intracavity gas pressure, prevent material from leakage.
In order to allow packing 2 more firm being sealed between device body 7 and the Sealing 1, other increases packing gland 6, and packing 2 is arranged at packing gland 6, device body 7 and stops up in 1 space that surrounds.Because the fastening corrective action of 6 pairs of packings 2 of packing gland guaranteed that packing 2 can not cause because of wearing and tearing the generations of a large amount of leakages of gas seal intracavity gas, and sealing is improved because of packing gland 6 also.
Claims (3)
1. seal arrangement, comprise Sealing (1), packing (2) and device body (7), packing (2) is positioned at the space that device body (7) and Sealing (1) surround, it is characterized in that: be provided with Seal cage (3) in the device body (7), packing (2) is positioned between Seal cage (3) and the ambient atmosphere, be provided with compressed air interface (5) on the Seal cage (3), the Sealing (1) that Seal cage (3) is inserted in the device body (7) seals.
2. seal arrangement as claimed in claim 1 is characterized in that: comprise nockbush (4), nockbush (4) is adjacent with packing (2) and be positioned at a side near Seal cage (3).
3. seal arrangement as claimed in claim 1 or 2 is characterized in that: comprise packing gland (6), packing gland (6) is sealed in packing (2) in the space that device body (7) and Sealing (1) surround.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220684438 CN202955222U (en) | 2012-12-12 | 2012-12-12 | Sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220684438 CN202955222U (en) | 2012-12-12 | 2012-12-12 | Sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202955222U true CN202955222U (en) | 2013-05-29 |
Family
ID=48460795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220684438 Expired - Fee Related CN202955222U (en) | 2012-12-12 | 2012-12-12 | Sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202955222U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120306A (en) * | 2017-05-09 | 2017-09-01 | 福建东亚环保科技股份有限公司 | A kind of blower fan of sealing structure and the application sealing structure |
-
2012
- 2012-12-12 CN CN 201220684438 patent/CN202955222U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120306A (en) * | 2017-05-09 | 2017-09-01 | 福建东亚环保科技股份有限公司 | A kind of blower fan of sealing structure and the application sealing structure |
| CN107120306B (en) * | 2017-05-09 | 2019-02-05 | 福建东亚环保科技股份有限公司 | A kind of sealing structure and the blower using the sealing structure |
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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: 20130529 Termination date: 20211212 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |