CN202746584U - Conical inner pressure sealing device of boiler minor-caliber header - Google Patents
Conical inner pressure sealing device of boiler minor-caliber header Download PDFInfo
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- CN202746584U CN202746584U CN 201220477643 CN201220477643U CN202746584U CN 202746584 U CN202746584 U CN 202746584U CN 201220477643 CN201220477643 CN 201220477643 CN 201220477643 U CN201220477643 U CN 201220477643U CN 202746584 U CN202746584 U CN 202746584U
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Abstract
The utility model discloses a conical inner pressure sealing device of a boiler minor-caliber header; the conical inner pressure sealing device is characterized in that a round hole is formed in the main body of the header, the internal surface of the round hole is conical, the conical surface is of the shape of shrinking into the header and spreading outwards, the internal part of the conical surface is concentrically provided with a sealing metal sleeve corresponding to the conical surface, an annular expansion slot is arranged around the inner surface of the sealing metal sleeve, the inner edge chamfers at two ends of the sealing metal sleeve are bevel surfaces; the sealing metal sleeve is in fit connection with a pressing block by the bevel surface at the heavy caliber end of the conical surface of the round hole, the pressing block is fixedly connected to the main body of the header by a thread, the sealing metal sleeve is in fit connection with an expansion block by the bevel surface at the minor-caliber end of the conical surface of the round hole, the expansion block is connected with a threaded rod, and the threaded rod is matched with a nut by passing through the center of the sealing metal sleeve and the center of the pressing block. The conical inner pressure sealing device is suitable for sealing a door hole of the boiler minor-caliber header; a metal washer can keep a long-term sealing effect, is long in service life and not easy to damage and has a good sealing effect due to the adoption of the internal pressure sealing structure; and the conical inner pressure sealing device is safe and reliable, simple in structure and suitable for application and popularization.
Description
Technical field
The utility model relates to a kind of boiler header seal arrangement, and particularly the small-bore header taper of a kind of boiler inner pressuring sealing device is applicable to the sealing of small-bore header opening.
Background technique
Header is the common parts in the boiler equipment, be used for compiling, mix, distributing working medium, it is the link hinge that heating surface is arranged, also can be used for suspending in midair heating surface, install hydrophobic or drainage device, for check, repair, the work such as maintenance, the larger caliber header of internal diameter＞400mm all is provided with the manhole device, to small-bore header, operated by rotary motion hand hole, a hole or peep hole.Operation is high-temperature high-pressure medium in the boiler header, very high to the requirement of sealing, and at present, it is plane inner pressuring sealing structure that the header aperture of door extensively adopts, and uses nonmetallic gasket.This kind seal style is safe and reliable, technology maturation, but for small-bore header, seal f ace width is narrower, and installation difficulty is large, sealing surface is easy to wear during use, nonmetallic gasket easily lost efficacy, and the life-span is short, easy to clean not during replacing, domestic also have the sealing means of small-bore header being taked directly to weld end socket, but can cause header inside can't inspection and maintenance etc. problem.
Summary of the invention
The utility model is in order to solve the problem of above-mentioned small-bore header aperture of door, and the utility model provides the small-bore header taper of a kind of boiler inner pressuring sealing device, adopts metallic shim, has taken into account header sealing and maintenance maintenance requirement.
The technical solution adopted in the utility model is: the small-bore header taper of a kind of boiler inner pressuring sealing device, it is characterized in that header main body is provided with circular hole, the circular hole inner face is the conical surface, the conical surface is to the header internal contraction opens shape to the outside, to should the conical surface within it section be provided with one heart the sealing metal cover, sealing metal cover internal surface and outer surface are respectively equipped with the ring-type expansion slot, are the inclined-plane along chamfering in the sealing metal cover two ends; Sealing metal is enclosed within circular hole conical surface heavy caliber end and is connected with briquetting by the inclined-plane, briquetting is fixedly connected on the header main body by screw thread, sealing metal is enclosed within circular hole conical surface small-caliber end and is connected with expansion block by the inclined-plane, expansion block is connected with threaded stem, and threaded stem is passed by sealing metal cover center and briquetting center hole and is combined with nut.
Described sealing metal cover and briquetting surface of contact tapering are 30 °～35 °.
Described sealing metal cover and expansion block surface of contact tapering are 40 °～45 °.
Described circular hole inner face is that conical degree of conical surface is 1:15.
Described sealing metal cover hardness ratio briquetting, expansion block and more than the little 100HB of header main body.
Surface roughness is less than 6.3 between described sealing metal cover, briquetting, expansion block and header main body surface of contact.
Described expansion slot is more than the twice.
Described expansion slot section is V-type or arc or trapezoidal, and its degree of depth is less than 1/3rd of the sealing metal sleeve wall thickness.
The utility model is realized sealing by expansion block distending sealing metal cover, be applicable to hand hole, a hole of the small-bore header of boiler, the sealing of peep hole, inner and outer surface can better absorb the storage compartment swell increment with the metal washer of expansion slot, and the pressure that Expansion sealing needs is little, keeps long sealing effect, long not rapid wear of life-span, because inherited the inner pressuring sealing structure of traditional header aperture of door, boiler operatiopn pressure is higher, sealing effect is better, safe and reliable, simple in structurely be suitable for application.
Description of drawings
Fig. 1 is the utility model example structure schematic representation;
Fig. 2 is the utility model embodiment sealing metal nested structure schematic representation.
Number in the figure title: 1 header main body; 2 sealing metal covers; 3 expansion slots; 4 briquettings; 5 expansion blocks; 6 threaded stems; 7 nuts; 8 pads.
Embodiment
The utility model embodiment as shown in Figure 1, the small-bore header taper of this boiler inner pressuring sealing device, it is characterized in that header main body 1 is provided with circular hole, the circular hole inner face is the conical surface, the conical surface is to the header internal contraction opens shape to the outside, conical degree of conical surface is 1:15, to should the conical surface within it section be provided with one heart sealing metal cover 2, sealing metal overlaps 2 internal surfaces and outer surface is respectively equipped with ring-type expansion slot 3, expansion slot 3 degree of depth are overlapped 1/3rd of 2 wall thickness less than sealing metal, and it is the inclined-plane that sealing metal overlaps in 2 two ends along chamfering; Sealing metal cover 2 is connected with briquetting 4 at circular hole conical surface heavy caliber end by the inclined-plane, and the surface of contact tapering is 30 °～35 °, and briquetting 4 is fixedly connected on the header main body 1 by screw thread, is provided with center hole; Sealing metal cover 2 is connected with expansion block 5 at circular hole conical surface small-caliber end by the inclined-plane, the surface of contact tapering is 40 °～45 °, expansion block 5 is connected with threaded stem 6, and threaded stem 6 overlaps 2 centers and briquetting 4 center holes by sealing metal and passes and be combined with nut 7, and nut 7 is for adding high nut and being furnished with pad 8; Sealing metal overlaps 2 hardness ratio briquettings 4, expansion block 5 and more than the header main body 1 little 100HB; Surface roughness is less than 6.3 between sealing metal cover 2, briquetting 4, expansion block 5 and header main body 1 surface of contact; During installation sealing metal cover 2 is placed on briquetting 4 fitting surfaces by design direction, the threaded stem 6 on the expansion block 5 is passed sealing metal overlap 2 centers and briquetting 4 center holes and cooperate pad 8 and nut 7, pretension seal arrangement are installed; Next briquetting 4 and header main body 1 are threaded connection, keep on request the assemblage gap between briquetting 4 and the header main body 1, maintenance briquetting 4 positions are motionless, press designing requirement, tighten to add high nut 7 outside header, make the sealing of header aperture of door; Sealing metal overlaps inclined-plane, 2 two ends is connected airtight the connection with expansion block with briquetting 4 respectively, in briquetting 4 and expansion block 5 effects, sealing metal cover 2 outside distendings are deformed, centering voluntarily, sealing metal overlaps 2 two ends and circular hole inner conical surface face forms the ring packing line, inside and outside expansion slot 3 is out of shape absorption storage compartment swell increment simultaneously in the deformation process, can keep long sealing effect, life-span length is rapid wear not, has adopted the inner pressuring sealing structure of traditional header aperture of door, boiler operatiopn pressure is higher, sealing effect is better, is applicable to the hand hole of the small-bore header of boiler, hole, the sealing of peep hole, safe and reliable, simple in structure, be suitable for application.
Claims (8)
1. the small-bore header taper of boiler inner pressuring sealing device, it is characterized in that header main body (1) is provided with circular hole, the circular hole inner face is the conical surface, the conical surface is to the header internal contraction opens shape to the outside, to should the conical surface within it section be provided with one heart sealing metal cover (2), sealing metal cover (2) internal surface and outer surface are respectively equipped with ring-type expansion slot (3), are the inclined-plane along chamfering in sealing metal cover (2) two ends; Sealing metal cover (2) is connected with briquetting (4) at circular hole conical surface heavy caliber end by the inclined-plane, briquetting (4) is fixedly connected on the header main body (1) by screw thread, sealing metal cover (2) is connected with expansion block (5) at circular hole conical surface small-caliber end by the inclined-plane, expansion block (5) is connected with threaded stem (6), and threaded stem (6) is passed by sealing metal cover (2) center and briquetting (4) center hole and is combined with nut (7).
2. the small-bore header taper of boiler according to claim 1 inner pressuring sealing device is characterized in that described sealing metal cover (2) and briquetting (4) surface of contact tapering are 30 °～35 °.
3. the small-bore header taper of boiler according to claim 1 inner pressuring sealing device is characterized in that described sealing metal cover (2) and expansion block (5) surface of contact tapering are 40 °～45 °.
4. the small-bore header taper of boiler according to claim 1 inner pressuring sealing device is characterized in that described circular hole inner face is that conical degree of conical surface is 1:15.
5. the small-bore header taper of boiler according to claim 1 inner pressuring sealing device is characterized in that described sealing metal cover (2) hardness ratio briquetting (4), expansion block (5) and more than the little 100HB of header main body (1).
6. the small-bore header taper of boiler according to claim 1 inner pressuring sealing device is characterized in that surface roughness is less than 6.3 between described sealing metal cover (2), briquetting (4), expansion block (5) and header main body (1) surface of contact.
7. the small-bore header taper of boiler according to claim 1 inner pressuring sealing device is characterized in that described expansion slot (3) is for more than the twice.
8. the small-bore header taper of boiler according to claim 1 inner pressuring sealing device is characterized in that described expansion slot (3) section is V-type or arc or trapezoidal, and its degree of depth is less than 1/3rd of sealing metal cover (2) wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477643 CN202746584U (en) | 2012-09-19 | 2012-09-19 | Conical inner pressure sealing device of boiler minor-caliber header |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220477643 CN202746584U (en) | 2012-09-19 | 2012-09-19 | Conical inner pressure sealing device of boiler minor-caliber header |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202746584U true CN202746584U (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220477643 Expired - Fee Related CN202746584U (en) | 2012-09-19 | 2012-09-19 | Conical inner pressure sealing device of boiler minor-caliber header |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202746584U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865367A (en) * | 2012-09-19 | 2013-01-09 | 中国船舶重工集团公司第七�三研究所 | Small-caliber header conical internal pressure sealing device for boiler |
-
2012
- 2012-09-19 CN CN 201220477643 patent/CN202746584U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865367A (en) * | 2012-09-19 | 2013-01-09 | 中国船舶重工集团公司第七�三研究所 | Small-caliber header conical internal pressure sealing device for boiler |
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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: 20130220 Termination date: 20130919 |