CN204828683U - Ash locking -valve seal structure - Google Patents
Ash locking -valve seal structure Download PDFInfo
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- CN204828683U CN204828683U CN201520498600.5U CN201520498600U CN204828683U CN 204828683 U CN204828683 U CN 204828683U CN 201520498600 U CN201520498600 U CN 201520498600U CN 204828683 U CN204828683 U CN 204828683U
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- valve
- valve head
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- ring
- sealing
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Abstract
The utility model provides an ash locking -valve seal structure, carries out hardening treatment through the one side to contacting with the valve seat seal ring on the valve head sealing ring for arc surface on the valve head sealing ring becomes the spherical outside surface and produces the sclerosis layer, hardening treatment, specifically be: joining in marriage merga pass pressurization spinning through arc surface and valve seat seal facial features and grinding the sclerosis back, this arc surface changes outer spherical sealed face into, convex surface promptly, and the valve head sealing ring is encircling surface to surface contact with valve seat seal. The utility model provides a sealed face of valve head and the cooperation of valve seat seal facial features adopt the guide structure centering to rectify, ensure in the use centering of valve head and disk seat, extension sealing device life.
Description
Technical field
The utility model relates to the technology in Coal Chemical Industry pressurized-gasification furnace field, specifically a kind of grey locking-valve sealing configuration.
Background technique
Crushed coal pressurized-gasification furnace is industrialized coal pressurizing gasifying apparatus, ash lock is the ash-exhausting device of gasification oven bottom, and valve is the core component of ash lock, needs at high temperature frequent, strict guarantee must seal when closing, the normal pressure release ash discharge of ash lock could be ensured.The import and export of ash lock are equipped with valve, to control coal and ash discharge, are called ash and lock valve and lower valve.Ash is locked, the switch motion of lower valve by swing-bar mechanism by the action of hydraulic pressure installation band ovable valve stem.
Current Coal Chemical Industry pressurized-gasification furnace valve contact surface all adopts very stiff and demanding sealing surface.The crushed coal pressurized-gasification furnace that former German company is manufactured, multiplex brown coal are raw material, and the sealing surface of its grey locking-valve head and valve seat contacting point is pile-up welding hard alloy material.It is raw material that most enterprise of China commonly uses low grade coal, and lime-ash carbon left is high, causes locked ash temperature high, and gangue content is high simultaneously, ash solids pellet hardness is high, and sealing surface erosive wear is aggravated.Therefore, when grey locking-valve head, valve seat all adopt hardfacing alloy sealing surface, its sealing surface erosive wear is serious, and the material property of sealing surface is identical simultaneously, valve sealing face is very easily seam in the environment of High Temperature High Pressure, and easily produces adhesive wear under friction in switching process.In actual using process, when after the concentrated wear of grey Lock valve sealing surface, after the airflow scouring of band gangue, hard lime-ash, impaired of sealing surface expands rapidly, and grey Lock valve is very easily damaged.
Through finding the retrieval of prior art, Chinese patent literature CN203703182U, date of publication 2014.7.9, disclose a kind of crushed coal pressurized-gasification furnace ash locking-valve head seal arrangement, comprise valve head, valve head sealing edge is provided with annular notch, be provided with hardfacing alloy ring in annular notch, hardfacing alloy ring and annular notch form integral structure by bead-welding technology.
Chinese patent literature CN202884071U; date of publication 2013.4.17; disclose the seal arrangement of a kind of crushed coal pressurized-gasification furnace ash locking-valve; as shown in Figure 1; comprise valve seat, pressure ring, valve seat carbide ring, protective gear, spool carbide ring and spool; pressure ring is fixed on above valve seat; protective gear is fixed on valve base inner wall; valve seat carbide ring card is to pressure ring, between valve seat and protective gear; protective gear overhead is bottom valve seat carbide ring; spool carbide ring is fixed on spool outer rim, contacts with the oblique sealing surface of valve seat carbide ring.But the sealing surface of above-mentioned technology valve head seal ring and valve base sealing ring all adopts right-angle structure, in use easily produce larger gap because of fitting surface wearing and tearing, valve head and valve seat can not accurate centerings, cause localized stress excessive, sealing effect declines, seal ring easy-rupturing.
Model utility content
The utility model is for prior art above shortcomings, propose a kind of grey locking-valve sealing configuration, valve head sealing surface matches with sealing surface of seat, adopts guide structure centering rectification, guarantee the centering of valve head and valve seat in using process, extend seal life.
The utility model is achieved through the following technical solutions:
The utility model relates to a kind of grey locking-valve sealing configuration, comprise: valve head, the valve head seal ring matched with valve head, valve seat and the valve base sealing ring matched with valve seat, wherein: valve head is connected with valve seat, the outer spherical surface of valve head seal ring, the i.e. inner ball surface of convex surface and valve base sealing ring, namely concave surface is mating spherical surfaces.
Described mating spherical surfaces specifically refers to that face contacts, and the angle of the adjacent bi-side of the surface of contact of valve base sealing ring is 100 ° ~ 120 °.
Technique effect
Compared with prior art, the utility model valve head sealing surface matches with sealing surface of seat, and adopt guide structure centering rectification, structural strength is high, sealing surface erosion resistance, wear-resistant, and valve sealing face centering is stablized, and extends the working life of grey Lock valve.
Accompanying drawing explanation
Fig. 1 is prior art structural representation.
Fig. 2 is the utility model structural representation;
Fig. 3 is Fig. 2 close-up schematic view;
Fig. 4 is example structure schematic diagram;
In figure: 1 is valve head, 2 is valve head seal ring, and 3 is guide structure, and 4 is valve seat, and 5 is valve base sealing ring, and 6 is valve base sealing ring sealing surface, and 7 is valve head seal ring seal face.
Embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented under premised on technical solutions of the utility model; give detailed mode of execution and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment 1
In the present embodiment, valve head seal ring 2 and valve base sealing ring 5 are initially linear contact lay, the beginning radius of machining of the arc surface that valve base sealing ring 5 contacts with valve head seal ring 2 is 5mm, the hardness of the sealing surface 7 of valve head seal ring 2 is HRC55, after cure process, the hardness that the circular arc sealing surface of valve head seal ring 2 changes the spherical seal surface 7 matched with valve base sealing ring 5 into is HRC62 ~ 68, valve head seal ring 2 contacts with 5, valve base sealing ring, and the angle of the adjacent bi-side of the surface of contact of valve base sealing ring 2 is 105 °.
Cure process described in the present embodiment, be specially: the beginning radius of machining of valve head build-up welding sealing ring is 5mm (unit mm), valve head build-up welding sealing ring is coordinated with valve base sealing ring centering and assembles, and to the above load of valve head seal ring imposed load 2000Kg, valve seat is with the arc surface of the rotating speed spinning valve head build-up welding sealing ring of 3r/min, until arc surface produces be deformed into the inner ball surface with valve base sealing ring, the i.e. outer spherical surface that matches of concave surface, i.e. convex surface, built-up welding sealing surface produces work-hardening simultaneously.
As shown in Figure 2, for the seal arrangement obtained by above-mentioned process, comprise: valve head 1, the valve head seal ring 2 matched with valve head 1, valve seat 4 and the valve base sealing ring 5 matched with valve seat 4, wherein: valve head 1 is connected with valve seat 4, valve head seal ring 2 and valve base sealing ring 5 mating spherical surfaces.
Described valve head 1 is provided with guide structure 3.
Described guide structure 3 is taper.
Described guide structure 3 contacts with valve base sealing ring 5.
Described valve head seal ring 2 and guide structure 3 adopt built-up welding high temperature wear resistant alloy.
Described valve base sealing ring 5 adopts powder metallurgy sintered widia.
When valve head 1 produce centering be partial to 5 ° time, guide structure 3 is rectified a deviation on the right side of valve base sealing ring sealing surface.
Compared with the prior art in Fig. 1, prior art adopts valve head and the valve seat in line contact sealing face, makes sealing surface of seat bear larger pressure, cause sealing surface of seat in actual production often to occur that localized crush is damaged due to less area of contact.This device adopts valve head outer spherical surface to contact with the face of valve seat inner ball surface and seals, and not only the intensity of sealing surface improves, and reduces the pressure of sealing surface because area of contact increases, thus can avoid valve seat and valve head sealing surface localized crush.In addition, the overlay cladding initial hardness of valve head sealing surface is softer, plasticity and toughness are high, and after cure process, the hardness on sealing surface top layer increases, but still plasticity and toughness are higher on the secondary top layer of sealing surface, under arms in process, when being subject to impacting, this valve head built-up welding sealing surface not easily ruptures.
Embodiment 2
In the present embodiment, valve head seal ring 2 and valve base sealing ring 5 are initially linear contact lay, and the hardness of valve head seal ring 2 is HRC35 ~ 40, and the beginning radius of machining of the arc surface that described valve base sealing ring 5 contacts with valve head seal ring 2 is 1mm.
As shown in Figure 4, after cure process, the hardness of the sealing surface 7 of valve head seal ring 2 is HRC60, valve head seal ring 2 contacts with 5, valve base sealing ring, and the angle of the adjacent bi-side of the surface of contact of valve base sealing ring 2 is 115 °, thus form very stiff and demanding contact form, improve the stability of grey Lock valve.
Cure process described in the present embodiment, be specially: the beginning radius of machining of valve head build-up welding sealing ring is 1mm (unit mm), valve head build-up welding sealing ring is coordinated with valve base sealing ring centering and assembles, and to the above load of valve head seal ring imposed load 4000Kg, valve seat is with the arc surface of the rotating speed spinning valve head build-up welding sealing ring of 5r/min, until arc surface produces work-hardening, partial circle arc deformation is the inner ball surface with valve base sealing ring simultaneously, the i.e. outer spherical surface that matches of concave surface, i.e. convex surface.
When valve head 1 produces centering deflection at 0 ° ~ 10 °, guide structure 3 is rectified a deviation the carrying out of the sealing surface of valve base sealing ring 5, presses partially with the sealing surface of valve base sealing ring 5 to reduce the valve head seal ring seal face 7 produced because of alignment deviation.
Claims (7)
1. a grey locking-valve sealing configuration, is characterized in that, comprising: valve head, the valve head seal ring matched with valve head, valve seat and the valve base sealing ring matched with valve seat, wherein: valve head is connected with valve seat, valve head seal ring and valve base sealing ring are mating spherical surfaces.
2. grey locking-valve sealing configuration according to claim 1, is characterized in that, described valve head seal ring and valve base sealing ring are that face contacts, and the angle of the adjacent bi-side of the surface of contact of valve base sealing ring is 100 ° ~ 120 °.
3. grey locking-valve sealing configuration according to claim 1 and 2, is characterized in that, described valve head seal ring is built-up welding high temperature wear resistant alloy.
4. the grey locking-valve sealing configuration according to claim 1 or 1, is characterized in that, described valve base sealing ring adopts powder metallurgy sintered widia.
5. grey locking-valve sealing configuration according to claim 4, is characterized in that, the hardness of the sealing surface of described valve base sealing ring is HRC62 ~ 68.
6. grey locking-valve sealing configuration according to claim 1, is characterized in that, described valve head is provided with the guide structure of taper.
7. grey locking-valve sealing configuration according to claim 6, is characterized in that, described guide structure is built-up welding high temperature wear resistant alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520498600.5U CN204828683U (en) | 2015-07-10 | 2015-07-10 | Ash locking -valve seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520498600.5U CN204828683U (en) | 2015-07-10 | 2015-07-10 | Ash locking -valve seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204828683U true CN204828683U (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520498600.5U Expired - Fee Related CN204828683U (en) | 2015-07-10 | 2015-07-10 | Ash locking -valve seal structure |
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| Country | Link |
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| CN (1) | CN204828683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020407A (en) * | 2015-07-10 | 2015-11-04 | 江西维元科技有限公司 | Ash lock valve sealing structure and realization method thereof |
-
2015
- 2015-07-10 CN CN201520498600.5U patent/CN204828683U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020407A (en) * | 2015-07-10 | 2015-11-04 | 江西维元科技有限公司 | Ash lock valve sealing structure and realization method thereof |
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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: 20151202 Termination date: 20180710 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |