CN201507651U - Sealing device for inverted pressing shaft lever - Google Patents
Sealing device for inverted pressing shaft lever Download PDFInfo
- Publication number
- CN201507651U CN201507651U CN 200920208958 CN200920208958U CN201507651U CN 201507651 U CN201507651 U CN 201507651U CN 200920208958 CN200920208958 CN 200920208958 CN 200920208958 U CN200920208958 U CN 200920208958U CN 201507651 U CN201507651 U CN 201507651U
- Authority
- CN
- China
- Prior art keywords
- gland
- cap
- axostylus axostyle
- filler
- end cap
- 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 - Lifetime
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- Sealing Devices (AREA)
Abstract
A sealing device for an inverted pressing shaft lever is characterized in that an end cover and a shell cover are both sleeved on a shaft lever and connected through a bolt; the lower surface of the end cover is provided with a circle of annular groove; a bolt hole penetrating through the upper surface of the end cover is arranged in the groove; an inner wall of the shell cover is provided with a circle of step below the groove; an inverted pressing sleeve is cylindrical, the lower end is provided with a circle of inner flange extending to the shaft lever and the outer surface of the upper end is provided with a circle of outer flange arranged on the step of the shell cover; a gap is arranged between the outer flange and the groove of the end cover; a threaded hole is arranged I the outer flange; a gap is arranged between the inverted pressing sleeve and the shaft lever; filler is filled in the gap between the inverted pressing sleeve and the shaft lever; the lower end of a stud penetrates through the bolt hole of the end cover and is connected with the outer flange of the inverted pressing sleeve; a nut is arranged at the upper end of the stud; and a disc spring group is arranged between the nut and the end cover. In the utility model, the distribution of the pressing force is excellent, the life is long and the workload of daily maintenance is reduced.
Description
Technical field
The utility model relates to the shaft sealing technology, particularly relates to a kind of rod seal of falling last item device.
Background technique
The axostylus axostyle sealing is the position of the easiest appearance " run, drip, leak " in the equipment such as valve, compressor, reactor.Existing axostylus axostyle adopts the seal form of packing filling more, referring to Fig. 1, mainly rely on gland from the outside with the filler axial compression, produce radial compaction power and make filler be close to the axostylus axostyle surface and stop medium to leak outside.
Because filler is an elastic plastic body, the axial pressing force of gland is owing to the minimizing gradually vertically with the frictional force of Stuffing box inwall, so the distribution of radial compaction power to the inner, became mild after sharply successively decreasing before this by the gland end shown in A among Fig. 1.The distribution of sealed medium pressure is successively decreased to the gland end by the inner shown in B among Fig. 1.The distribution of filler radial compaction power is opposite with the distribution of pressure medium, and inner pressure medium maximum should give big sealing force, and the radial compaction power of filler is minimum herein, so impacting force does not play a role well.
Existing axostylus axostyle seal form just increases the impacting force of filler for obtaining sealability, causes the filler frictional force of gland end very big, often causes axostylus axostyle and filler in the problem that occurs inordinate wear, the increase of operation moment of torsion near the gland end too early.Occur leaking and just need frequently tighten gland bolt, the maintenance workload of daily adjusting is very big.
Summary of the invention
Technical problem to be solved in the utility model is exactly to provide a kind of rod seal of falling last item device for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions: a kind of rod seal of falling last item device, it is characterized in that, comprise axostylus axostyle, end cap, cap, fall gland, filler, double-screw bolt, nut and dish spring group, described end cap, cap all is sheathed on the axostylus axostyle, both connect by bolt, the lower surface of described end cap is provided with the groove of a loop, be provided with the bolt hole that connects the end cap upper surface in this groove, the inwall of described cap is provided with the step that a circle is positioned at beneath trenches, it is described that gland is cylindrical, its lower end is provided with the inward flange that a circle extends to axostylus axostyle, the outer surface of its upper end is provided with one and encloses the outward flange that is positioned on the cap step, be provided with the gap between described outward flange and the end cap groove, be provided with tapped hole in this outward flange, be provided with the gap between described gland and the axostylus axostyle, described filler is filled in down in the gap between gland and the axostylus axostyle, the lower end of described double-screw bolt is passed the bolt of cover hole and is connected with the outward flange of falling the gland, described nut is located at the upper end of double-screw bolt, and described dish spring is mounted between nut and the end cap.
Be provided with a seal ring between described gland and the cap.
Compared with prior art, compressing of the utility model filler by falling the tension realization of gland to the end cap side, opposite with prior art filler compaction direction, make the distribution of filler radial compaction power consistent with the distribution of pressure medium, reach the effect that the impacting force distribution is best, reduced axostylus axostyle and filler inordinate wear, the tension of gland is afforded redress by dish spring group, utilized the self sealing action of pressure medium simultaneously, need not frequently tights a bolt compresses filler, has reached the effect that reduces the line service amount.
Description of drawings
Fig. 1 is the prior art constructions schematic representation;
Fig. 2 is a structural representation of the present utility model.
Wherein: A is that filler radial compaction power distributes, and B is the sealed medium pressure distribution.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 2, a kind of rod seal of falling last item device, comprise axostylus axostyle 4, end cap 5, cap 10, fall gland 2, filler 3, double-screw bolt 7, nut 8 and dish spring group 6, described end cap 5, cap 10 all is sheathed on the axostylus axostyle 4, both connect by bolt 9, the lower surface of described end cap 5 is provided with the groove of a loop, be provided with the bolt hole that connects the end cap upper surface in this groove, the inwall of described cap 5 is provided with the step that a circle is positioned at beneath trenches, it is described that gland 2 is cylindrical, its lower end is provided with the inward flange that a circle extends to axostylus axostyle, the outer surface of its upper end is provided with one and encloses the outward flange that is positioned on the cap step, be provided with the gap between described outward flange and end cap 5 grooves, be provided with tapped hole in this outward flange, be provided with the gap between described gland 2 and the axostylus axostyle 4, described filler 3 is filled in down in the gap between gland 2 and the axostylus axostyle 4, the lower end of described double-screw bolt 7 pass end cap 5 bolts hole and with fall gland 2 outward flanges and be connected, described nut 8 is located at the upper end of double-screw bolt 7, and described dish spring group 6 is located between nut 8 and the end cap 5.
Be provided with a seal ring 1 between described gland 2 and the cap 10.
The gland 2 that falls is a cylindrical shape, and endoporus has flange, and outer wall has the flange that has tapped hole.End cap 5 is flat plectane, and central authorities form mesopore with axostylus axostyle 4, and the bottom has annular ditch groove, and has bolt hole.Filler 3 is installed in down gland 2 and 4 of axostylus axostyles form in the Stuffing box, and the gland 2 that falls is installed in the step hole of cap 10, and has seal ring 1 to form static seal.End cap 5 is fixed on the cap 10 by bolt 9, and filler 3, the gland 2 that falls are remained in the step hole of cap 10.Double-screw bolt 7 passes end cap 5, and the lower end is screwed in down on the gland 2, and the upper end nut is equipped with many group dish springs 6 for 8 times.The bottom groove of the top of gland 2 and end cap 5 is gapped, can strain to end cap 5 sides falling gland 2 behind the fastening nut 8, fall the endoporus flange of gland 2 with filler 3 to end cap 5 side compressions, pressure medium acts on down gland at 2 the end simultaneously, further compressible filler 3, generation radial compaction power make filler 3 be close to axostylus axostyle 4 surfaces and stop medium to leak outside.
Compressing of filler 3 by falling the tension realization of gland 2 to end cap 5 sides, opposite with prior art filler compaction direction, the distribution of filler radial compaction power, pressure medium as shown in Figure 2, both distributions are consistent, reach the impacting force effect best, that reduced axostylus axostyle 4 and filler 3 inordinate wears that distributes.The tension of gland 2 is afforded redress by dish spring group 6, has utilized the self sealing action of pressure medium simultaneously, and need not frequently tights a bolt compresses filler, has reached the effect that reduces the line service amount.
Claims (2)
1. the rod seal of falling last item device, it is characterized in that, comprise axostylus axostyle, end cap, cap, fall gland, filler, double-screw bolt, nut and dish spring group, described end cap, cap all is sheathed on the axostylus axostyle, both connect by bolt, the lower surface of described end cap is provided with the groove of a loop, be provided with the bolt hole that connects the end cap upper surface in this groove, the inwall of described cap is provided with the step that a circle is positioned at beneath trenches, it is described that gland is cylindrical, its lower end is provided with the inward flange that a circle extends to axostylus axostyle, the outer surface of its upper end is provided with one and encloses the outward flange that is positioned on the cap step, be provided with the gap between described outward flange and the end cap groove, be provided with tapped hole in this outward flange, be provided with the gap between described gland and the axostylus axostyle, described filler is filled in down in the gap between gland and the axostylus axostyle, the lower end of described double-screw bolt is passed the bolt of cover hole and is connected with the outward flange of falling the gland, and described nut is located at the upper end of double-screw bolt, and described dish spring is mounted between nut and the end cap.
2. a kind of rod seal of falling last item device according to claim 1 is characterized in that, is provided with a seal ring between described gland and the cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920208958 CN201507651U (en) | 2009-09-18 | 2009-09-18 | Sealing device for inverted pressing shaft lever |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920208958 CN201507651U (en) | 2009-09-18 | 2009-09-18 | Sealing device for inverted pressing shaft lever |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201507651U true CN201507651U (en) | 2010-06-16 |
Family
ID=42468778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920208958 Expired - Lifetime CN201507651U (en) | 2009-09-18 | 2009-09-18 | Sealing device for inverted pressing shaft lever |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201507651U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022539A (en) * | 2009-09-18 | 2011-04-20 | 上海冠龙阀门机械有限公司 | Inverse pressing shaft rod sealing structure |
-
2009
- 2009-09-18 CN CN 200920208958 patent/CN201507651U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022539A (en) * | 2009-09-18 | 2011-04-20 | 上海冠龙阀门机械有限公司 | Inverse pressing shaft rod sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100616 |