CN203880183U - Packing gland for plunger type valve - Google Patents
Packing gland for plunger type valve Download PDFInfo
- Publication number
- CN203880183U CN203880183U CN201420309014.7U CN201420309014U CN203880183U CN 203880183 U CN203880183 U CN 203880183U CN 201420309014 U CN201420309014 U CN 201420309014U CN 203880183 U CN203880183 U CN 203880183U
- Authority
- CN
- China
- Prior art keywords
- protective layer
- assembly
- lid
- valve rod
- plunger type
- 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
Links
Abstract
The utility model relates to a packing gland for a plunger type valve. The packing gland comprises an annular cover and a fixing disc arranged on the peripheral face of the cover, a mounting cavity used for mounting a valve rod is formed in the cover, an annular protection layer is arranged in the mounting cavity and attached to the valve rod, and the material of the protection layer is softer than that of the valve rod. The packing gland for the plunger type valve can reduce abrasion of the valve rod and is long in service life.
Description
Technical field
The utility model relates to a kind of plunger type valve, is specifically related to a kind of Gland.
Background technique
Plunger type valve is the one of gate valve, formed by parts such as valve body, valve gap, valve rod, plunger, guide sleeve, seal ring, handwheels, in the time that handwheel rotates, drive plunger upper and lower to-and-fro motion in guide sleeve by valve rod, make plunger end tilted conical surface and valve seat surface complete the open and close function of valve.
As topmost index wherein, sealing is that plunger type valve is focused on most always, and performance in order to ensure that it is good, method of today is packing cavity pack stuffing box packing in valve, allow it form nature oil sealing, make and play Gland and the valve rod laminating setting of fixation above packing cavity and be material of the same race, secondly, there is vertical action and circumferentially action in valve rod, so both are in long course of action, there will be the phenomenon of phase mutual friction, cause on valve rod occurring the unrepairable scar staying with Gland friction, directly cause valve rod in use, poor sealing, leak working medium, as keeped in repair this valve, must change valve rod, cause the maintenance expenses that produces great number.
Summary of the invention
The deficiency existing for prior art, the purpose of this utility model is to provide a kind of minimizing valve rod to be caused to the Gland for plunger type valve of wearing and tearing and long service life.
For achieving the above object; the utility model provides following technological scheme: comprise the lid that annular arranges and be arranged at the fixed tray of lid outer circumferential face; in described lid, be provided with the installation cavity for valve rod is installed; it is characterized in that: in described installation cavity, be provided with and valve rod laminating protective layer in the form of a ring, the material hardness of described protective layer is less than valve rod.
By adopting technique scheme, the protective layer that hardness is less than valve rod is set, what while making valve rod rotation with protective layer friction, wear and tear is protective layer, reduces as far as possible the damage to valve rod.
The utility model is further set to: described protective layer comprises body; described body shaft is provided with card and is assigned in the screens piece of filler lid two ends end face to two ends; the described axial two ends of body inner peripheral surface are provided with valve rod and support the positioning block of joining, and described body inner peripheral surface is provided with the cavity that reduces area of contact between two positioning blocks.
By adopting technique scheme; reserved cavity reduces the friction area between valve rod and protective layer body; positioning block by two ends positions; further reduce the damage of valve rod, and the screens piece that is arranged at body outer circumferential face is effectively installed on lid by protective layer in not using latch.
The utility model is further set to: described protective layer comprises by the first assembly and the second assembly and forming, screens piece and the positioning block of the protective layer described in one end form the first assembly, the screens piece of the described protective layer of the other end, positioning block and body form the second assembly, the position that described lid is corresponding with the first assembly is provided with limit chamber suitable with the first element shapes and that rotate for the first assembly, the opposite side that is positioned at the relative lid of the first assembly in described limit chamber is provided with limiting stopper, on the first described assembly edge, be provided with the breach suitable with limiting stopper shape.By adopting technique scheme, protective layer is split into two assemblies, be convenient to its installation and removal, because producing friction with valve rod always, it damages, so its working life is limited, need periodic replacement, the spacing of limiting stopper that the first assembly is subject on limit chamber can only be rotated therein, need to pack into or dismantle time, the breach of the first assembly aligns and can take out with limiting stopper, mounting type is simple, avoid adopting other locking elements, secondly, limit chamber for the first assembly rotation is set, in the time that ambient conditions causes valve rod and protective layer friction sharply to strengthen, protective layer can be along with stem movement, thereby offset a part of frictional force, further increase working life.
The utility model is further set to: described limiting stopper cross section is trapezoidal setting.
By adopting technique scheme, the limiting stopper that is trapezoidal setting only just can pack into or dismantle under accurate contraposition, can in the time of the first assembly rotation, not deviate from because of carelessness, ensures overall operation stability.
The utility model is further set to: in described cavity, be filled with lubricating grease.
By adopting technique scheme, lubricating grease reduces the frictional force between valve rod and protective layer and protective layer and lid, reduces both because of fricative heat and damage, is directly filled in cavity and rationally utilizes existing structure, and structure is simplified more.
The utility model is further set to: described lid and the material of fixed tray are No. 304 stainless steels, and the material of described protective layer is copper.
By adopting technique scheme, for aliging with other valve standards, lid and fixed tray still adopt general No. 304 general stainless steels, and protective layer adopts hardness to be less than stainless copper No. 304, draws materials conveniently, and processing is simple, is applicable to production and processing on a large scale.
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Brief description of the drawings
Fig. 1 is the sectional view of the utility model embodiment;
Fig. 2 is the plan view of the utility model embodiment;
Fig. 3 is the assembling schematic diagram of the utility model embodiment and valve rod.
Embodiment
As shown in Fig. 1-Fig. 3; the utility model discloses a kind of Gland for plunger type valve; comprise the lid 1 that annular arranges and be arranged at the fixed tray 2 of lid 1 outer circumferential face; in lid 1, be provided with the installation cavity 11 for valve rod is installed; in installation cavity 11, be provided with and valve rod laminating protective layer 3 in the form of a ring; the material hardness of protective layer 3 is less than valve rod; the protective layer 3 that hardness is less than valve rod is set; when valve rod rotation is rubbed with protective layer 3, wearing and tearing is protective layer, reduces as far as possible the damage to valve rod.
Protective layer 3 comprises body 31, the axial two ends of body 31 are provided with card and are assigned in the screens piece 32 of filler lid two ends end face, the body 31 axial two ends of inner peripheral surface are provided with valve rod and support the positioning block 33 of joining, body 31 inner peripheral surfaces are provided with the cavity 34 that reduces area of contact between two positioning blocks 33, reserved cavity 34 reduces the friction area between valve rod and protective layer 3 bodies, positioning block 33 by two ends positions, further reduce the damage of valve rod, and the screens piece 32 that is arranged at body 31 outer circumferential faces is effectively installed on lid 1 by protective layer 3 in not using latch.
Protective layer 3 comprises by the first assembly 35 and the second assembly 36 and forming, the screens piece 32 of one end protective layer 3 and positioning block 33 form the first assembly 35, the screens piece 32 of the protective layer 3 of the other end, positioning block 33 and body 31 form the second assembly 36, the position that lid 1 is corresponding with the first assembly 35 is provided with limit chamber 12 suitable with the first assembly 35 shapes and that rotate for the first assembly 35, the opposite side that is positioned at the first assembly 35 relative lids 1 in limit chamber 12 is provided with limiting stopper 121, on the first assembly 35 edges, be provided with the breach 351 suitable with limiting stopper 121 shapes, protective layer 3 is split into two assemblies, be convenient to its installation and removal, because producing friction with valve rod always, it damages, so its working life is limited, need periodic replacement, the spacing of limiting stopper 121 that the first assembly 35 is subject on limit chamber 12 can only be rotated therein, need to pack into or dismantle time, the breach 351 of the first assembly 35 aligns and can take out with limiting stopper 121, mounting type is simple, avoid adopting other locking elements, secondly, the limit chamber 12 rotating for the first assembly 35 is set, in the time that ambient conditions causes valve rod and protective layer 3 to rub sharply strengthening, protective layer 3 can be along with stem movement, thereby offset a part of frictional force, further increase working life.
Limiting stopper 121 cross sections are trapezoidal setting, and the limiting stopper 121 that is trapezoidal setting only just can pack into or dismantle under accurate contraposition, can in the time that the first assembly 35 rotates, not deviate from because of carelessness, ensure overall operation stability.
In cavity 34, be filled with lubricating grease, lubricating grease reduces the frictional force between valve rod and protective layer 3 and protective layer 3 and lid 1, reduces both because of fricative heat and damage, is directly filled in cavity 34 and rationally utilizes existing structure, and structure is simplified more.
The material of lid 1 and fixed tray 2 is No. 304 stainless steels; the material of protective layer 3 is copper; for aliging with other valve standards; lid 1 and fixed tray 2 still adopt general No. 304 general stainless steels; protective layer 3 adopts hardness to be less than stainless copper No. 304; draw materials conveniently, processing is simple, is applicable to production and processing on a large scale.
Claims (6)
1. the Gland for plunger type valve; comprise the lid that annular arranges and be arranged at the fixed tray of lid outer circumferential face; in described lid, be provided with the installation cavity for valve rod is installed; it is characterized in that: in described installation cavity, be provided with and valve rod laminating protective layer in the form of a ring, the material hardness of described protective layer is less than valve rod.
2. the Gland for plunger type valve according to claim 1; it is characterized in that: described protective layer comprises body; described body shaft is provided with card and is assigned in the screens piece of filler lid two ends end face to two ends; the described axial two ends of body inner peripheral surface are provided with valve rod and support the positioning block of joining, and described body inner peripheral surface is provided with the cavity that reduces area of contact between two positioning blocks.
3. the Gland for plunger type valve according to claim 2, it is characterized in that: described protective layer comprises by the first assembly and the second assembly and forming, screens piece and the positioning block of the protective layer described in one end form the first assembly, the screens piece of the described protective layer of the other end, positioning block and body form the second assembly, the position that described lid is corresponding with the first assembly is provided with limit chamber suitable with the first element shapes and that rotate for the first assembly, the opposite side that is positioned at the relative lid of the first assembly in described limit chamber is provided with limiting stopper, on the first described assembly edge, be provided with the breach suitable with limiting stopper shape.
4. the Gland for plunger type valve according to claim 3, is characterized in that: described limiting stopper cross section is trapezoidal setting.
5. the Gland for plunger type valve according to claim 4, is characterized in that: in described cavity, be filled with lubricating grease.
6. according to the Gland for plunger type valve described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that: described lid and the material of fixed tray are No. 304 stainless steels, and the material of described protective layer is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420309014.7U CN203880183U (en) | 2014-06-11 | 2014-06-11 | Packing gland for plunger type valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420309014.7U CN203880183U (en) | 2014-06-11 | 2014-06-11 | Packing gland for plunger type valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203880183U true CN203880183U (en) | 2014-10-15 |
Family
ID=51680678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420309014.7U Expired - Fee Related CN203880183U (en) | 2014-06-11 | 2014-06-11 | Packing gland for plunger type valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203880183U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370718A (en) * | 2015-11-30 | 2016-03-02 | 苏州林信源自动化科技有限公司 | Disc structure |
-
2014
- 2014-06-11 CN CN201420309014.7U patent/CN203880183U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370718A (en) * | 2015-11-30 | 2016-03-02 | 苏州林信源自动化科技有限公司 | Disc 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20210611 |