CN202756612U - Cone-shaped internal pressure sealing mechanism of small-bore header of boiler - Google Patents
Cone-shaped internal pressure sealing mechanism of small-bore header of boiler Download PDFInfo
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- CN202756612U CN202756612U CN 201220474609 CN201220474609U CN202756612U CN 202756612 U CN202756612 U CN 202756612U CN 201220474609 CN201220474609 CN 201220474609 CN 201220474609 U CN201220474609 U CN 201220474609U CN 202756612 U CN202756612 U CN 202756612U
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- bore
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- cone
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Abstract
The utility model discloses a cone-shaped internal pressure sealing mechanism of a small-bore header of a boiler. The cone-shaped internal pressure sealing mechanism of the small-bore header of the boiler is characterized in that a round hole is arranged in a header main body, the inner surface of the round hole is a cone surface, the cone surface contracts toward the interior of the header and is of an open shape toward the exterior of the header, a sealing metal sleeve, corresponding to the cone surface, is arranged inside the cone-shaped surface in a concentric mode, an expansion groove is arranged on the outer surface around the sealing metal sleeve, and the inner edge of both ends of the sealing metal sleeve is an inclined surface along a chamfer. The sealing metal sleeve, at a large-bore end of the cone-shaped surface of the round hole, is connected with a pressing block through the inclined surface in a matched mode, the pressing block is fixedly connected on the header main body through threads, the sealing metal sleeve, at a small-bore end of the cone-shaped surface of the round hole, is connected with an expanding block through the inclined surface, the expanding block is connected with a threaded rod, and the threaded rod penetrates through a center of the sealing metal sleeve and a central hole of the pressing block and is matched with a nut. The cone-shaped internal pressure sealing mechanism of the small-bore header of the boiler is suitable for sealing of a hand hole, a head hole and an access hole of the small-bore header of the boiler. A metal washer can keep long-term sealing effect, so that cone-shaped internal pressure sealing mechanism of the small-bore header of the boiler is long in service life and not easy to damage. By the adoption of an internal pressure sealing structure, the cone-shaped internal pressure sealing mechanism of the small-bore header of the boiler is good in sealing effect, 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 mechanism 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 mechanism, 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 mechanism, 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, being provided with expansion slot around sealing metal cover appearance, is 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 greater than 1/5th 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, appearance can keep long sealing effect with the sealing metal cover of expansion slot, 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 diagram;
Fig. 2 is the utility model embodiment sealing metal nested structure schematic diagram.
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 mechanism, 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, overlap 2 appearances around sealing metal and be provided with expansion slot 3, expansion slot 3 degree of depth be in sealing metal overlap 2 wall thickness 1/5th to 1/2nd between, 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, effect in briquetting 4 and expansion block 5, sealing metal cover 2 is deformed with the outside distending of briquetting 4 and expansion block 5 contact position, centering voluntarily, sealing metal overlaps 2 two ends and circular hole inner conical surface face forms the ring packing line, 3 liang of circular grooves of expansion slot are along close in the deformation process, can absorb the storage compartment swell increment, can keep long sealing effect, long not rapid wear of life-span, adopted the inner pressuring sealing structure of traditional header aperture of door, boiler operatiopn pressure is higher, and sealing effect is better, be applicable to the hand hole of the small-bore header of boiler, hole, the sealing of peep hole, safe and reliable, simple for structure, preparation process simply is suitable for application.
Claims (8)
1. the small-bore header taper of boiler inner pressuring sealing mechanism, 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), being provided with expansion slot (3) around sealing metal cover (2) appearance, is 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 mechanism 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 mechanism 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 mechanism 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 mechanism 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 mechanism 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 mechanism 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 mechanism is characterized in that described expansion slot (3) section is V-type or arc or trapezoidal, and its degree of depth is greater than 1/5th of sealing metal cover (2) wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474609 CN202756612U (en) | 2012-09-18 | 2012-09-18 | Cone-shaped internal pressure sealing mechanism of small-bore header of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474609 CN202756612U (en) | 2012-09-18 | 2012-09-18 | Cone-shaped internal pressure sealing mechanism of small-bore header of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202756612U true CN202756612U (en) | 2013-02-27 |
Family
ID=47735796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220474609 Expired - Fee Related CN202756612U (en) | 2012-09-18 | 2012-09-18 | Cone-shaped internal pressure sealing mechanism of small-bore header of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202756612U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853078A (en) * | 2012-09-18 | 2013-01-02 | 中国船舶重工集团公司第七�三研究所 | Conical inner pressure sealing mechanism for small-caliber connecting box of boiler |
-
2012
- 2012-09-18 CN CN 201220474609 patent/CN202756612U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853078A (en) * | 2012-09-18 | 2013-01-02 | 中国船舶重工集团公司第七�三研究所 | Conical inner pressure sealing mechanism for small-caliber connecting box of 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: 20130227 Termination date: 20130918 |