CN202884236U - Automatic pre-tightening mechanism for valve packing - Google Patents
Automatic pre-tightening mechanism for valve packing Download PDFInfo
- Publication number
- CN202884236U CN202884236U CN 201220597551 CN201220597551U CN202884236U CN 202884236 U CN202884236 U CN 202884236U CN 201220597551 CN201220597551 CN 201220597551 CN 201220597551 U CN201220597551 U CN 201220597551U CN 202884236 U CN202884236 U CN 202884236U
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- CN
- China
- Prior art keywords
- hold
- tightening mechanism
- spring group
- filler
- dish spring
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- Expired - Fee Related
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Abstract
The utility model discloses an automatic pre-tightening mechanism for valve packing. The automatic pre-tightening mechanism is a device for automatically making up pre-tightening force failure of a valve packing mechanism by the aid of elastic force released by a compressed spring. The automatic pre-tightening mechanism comprises a packing pressing nail and a packing pressing plate, the packing pressing plate is positioned above the packing pressing nail and is connected with a valve body through a double-head stud, the upper portion of the double-head stud is positioned by a nut in a screwed manner, and a disc spring group is arranged above or below the packing pressing plate by taking the nut as a peak, so that the packing pressing plate, the disc spring group and the packing pressing nail are elastically balanced. The pre-tightening force of the automatic pre-tightening mechanism is constant, a torque wrench for assembly can be omitted when the automatic pre-tightening mechanism is mounted, mounting efficiency and simplicity of tools are improved, and the pre-tightening force can be timely found and adjusted in daily maintenance.
Description
Technical field
The utility model patent relates to the mounting mechanism of filler, relate in particular to a kind of valve packing from pre-tightening mechanism.
Background technique
At present, the pretension mounting type of known valves filler, mainly be to rely on screw pair that the mode that the moment of torsion prerotation turns to pressure is acted directly on pretension on the filler, or in the process of pressure transmission, set up helical spring mode, the size of prefastening torque relies on torque spanner to come adjusting size, and these pre-pressing structures all exist following design deficiency: 1. the problem that pretightening force reduces in can not the auto-compensation using process; 2. the assembler has requirement, must use torque spanner; 3. regular maintenance inconvenience.
Summary of the invention
The utility model is in order to overcome the above problems, provide a kind of from pre-tightening apparatus, mainly utilize the characteristic curve of dish spring group uniqueness, change and the constant characteristic of output loads remedies the in use problem that reduces of pretightening force of filling body automatically in the interval internal strain amount of certain variations, make pretightening force keep constant.
The technical solution of the utility model is as follows:
A kind of valve packing is from pre-tightening mechanism, comprise filler pressure nail, hold-down grid, hold-down grid is positioned at filler and presses the side of nailing on, hold-down grid is connected with valve body by stud, described stud top screws the location with nut, take nut as the summit, dish spring group is set above or below hold-down grid, so that pressing between the nail three, hold-down grid, dish spring group, filler realize elastic equilibrium.
Further, stud is installed guide sleeve above hold-down grid, and dish spring group is installed on the guide sleeve, and dish spring group is installed protecting jacket outward, and nut is tightened on the protecting jacket top, and nail is pressed in hold-down grid below directly extruding filler.
Further, setting position line on guide sleeve.
Further, press the section of nailing on to arrange one at filler and protrude platform, place pad above platform, dish spring group is installed above pad, outside dish spring group protecting jacket is installed, hold-down grid is installed in the protecting jacket top.
Further, nail on the setting position line in the filler pressure.
The beneficial effects of the utility model are:
Make pretightening force keep constant, dish spring group has multiple different compound mode can select with applicable different operating mode needs.And the active force of dish spring acts on simultaneously and has also played locking effect on the screw pair, has further prevented the inefficacy of filling body.In addition, the mode that in the structure that dish spring group is installed, shows with scale, dish spring group is installed the maximum of compression, minimum and optimum visual the expressing in position, just can assemble without torque spanner when installing like this, improve the simplicity of installation efficiency and instrument, and in regular maintenance, can find timely and adjust pretightening force.
Description of drawings
Below by drawings and Examples the utility model is described further.
Fig. 1 a and Fig. 2 a be of the present utility model on valve the mounting point face sectional structure chart
Fig. 1 b and Fig. 2 b are structure enlarged views of the present utility model
Fig. 1 c and Fig. 2 c are installation indicating graduation enlarged views of the present utility model
Fig. 3 is the available combining form of dish spring group of the present utility model
Among Fig. 1 b: 1. stud 2. hexagon nuts 3. protecting jackets 4. dish spring groups 5. guide sleeves 6. hold-down grids
Among Fig. 2 b: 1. hold-down grid 2. protecting jackets 3. dish spring groups 4. pads 5. fillers are pressed nail
Embodiment
The mounting type of Fig. 1 a is selected in the situation suggestion that the valve rod of valve is thicker; in Fig. 1 b; utilize hold-down grid 6 to compress filler; and the pressure of hold-down grid 6 comes compressed dish spring group 4; turn hexagon nut 2 and drive protecting jacket 3 motions; protecting jacket 3 and guide sleeve 5 can protect dish spring group 4 work interference-free, discharge stably elastic force, and the dish spring group 4 in the light of actual conditions amount of the pressure that needs of situation and distortion is chosen three kinds of combining forms of a, b, c among Fig. 3.During installation protecting jacket 3 is positioned at the line of position of (Fig. 1 c) BEST on the guide sleeve 5, just can adjusts according to indicating positions during regular maintenance.
The mounting type of Fig. 2 a is selected in the situation suggestion that the valve rod of valve is thinner; in Fig. 2 b; utilize filler to press nail 15 to compress filler; and filler presses that the pressure of nail 15 comes compressed dish spring group 4; protecting jacket 3 and pad 14 are used for protecting 4 work of dish spring group interference-free, and the pressure that dish spring group 4 can in the light of actual conditions need and the amount of distortion are chosen the three kinds of combining forms of a, b, c among Fig. 3.During installation hold-down grid 6 is positioned at the line of position that filler is pressed (Fig. 2 c) BEST on the nail 15, just can adjusts according to indicating positions during regular maintenance.
What more than enumerate only is a specific embodiment of the present utility model.Obviously, the utility model can also have many distortion, and all distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.
Claims (5)
1. a valve packing is from pre-tightening mechanism, comprise filler pressure nail, hold-down grid, hold-down grid is positioned at filler and presses the side of nailing on, it is characterized in that, hold-down grid is connected with valve body by stud, and described stud top screws the location with nut, take nut as the summit, dish spring group is set above or below hold-down grid, realizes elastic equilibrium so that hold-down grid, dish spring group, filler are pressed between the nail three.
2. valve packing according to claim 1 is characterized in that from pre-tightening mechanism, and stud is installed guide sleeve above hold-down grid; dish spring group is installed on the guide sleeve; dish spring group is installed protecting jacket outward, and nut is tightened on the protecting jacket top, and nail is pressed in hold-down grid below directly extruding filler.
3. valve packing according to claim 2 is characterized in that from pre-tightening mechanism, setting position line on guide sleeve.
4. valve packing according to claim 1 is characterized in that from pre-tightening mechanism, presses the section of nailing on to arrange one at filler and protrudes platform; above platform, place pad; dish spring group is installed above pad, outside dish spring group protecting jacket is installed, hold-down grid is installed in the protecting jacket top.
5. valve packing according to claim 4 is characterized in that from pre-tightening mechanism, presses at filler to nail on the setting position line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220597551 CN202884236U (en) | 2012-11-13 | 2012-11-13 | Automatic pre-tightening mechanism for valve packing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220597551 CN202884236U (en) | 2012-11-13 | 2012-11-13 | Automatic pre-tightening mechanism for valve packing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202884236U true CN202884236U (en) | 2013-04-17 |
Family
ID=48075665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220597551 Expired - Fee Related CN202884236U (en) | 2012-11-13 | 2012-11-13 | Automatic pre-tightening mechanism for valve packing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202884236U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470825A (en) * | 2013-08-28 | 2013-12-25 | 陈银周 | Novel low-resistance pressure-relief type backflow preventer |
| CN105587914A (en) * | 2016-03-14 | 2016-05-18 | 西诺威阀门控制（苏州）有限公司 | Connecting structure for valve cover and valve body |
| CN106151543A (en) * | 2016-07-22 | 2016-11-23 | 苏州纽威阀门股份有限公司 | A kind of hard seal butterfly valve |
| CN106594282A (en) * | 2015-10-19 | 2017-04-26 | 南京凯盛国际工程有限公司 | Sealing device capable of automatically compensating abrasion loss |
| CN107701798A (en) * | 2017-11-15 | 2018-02-16 | 陈风琴 | A kind of valve with filtering function |
-
2012
- 2012-11-13 CN CN 201220597551 patent/CN202884236U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470825A (en) * | 2013-08-28 | 2013-12-25 | 陈银周 | Novel low-resistance pressure-relief type backflow preventer |
| CN103470825B (en) * | 2013-08-28 | 2016-01-20 | 陈银周 | Novel low-resistance pressure-relief type backflow preventer |
| CN106594282A (en) * | 2015-10-19 | 2017-04-26 | 南京凯盛国际工程有限公司 | Sealing device capable of automatically compensating abrasion loss |
| CN106594282B (en) * | 2015-10-19 | 2018-10-23 | 南京凯盛国际工程有限公司 | The sealing device of automatic compensation wear extent |
| CN105587914A (en) * | 2016-03-14 | 2016-05-18 | 西诺威阀门控制（苏州）有限公司 | Connecting structure for valve cover and valve body |
| CN106151543A (en) * | 2016-07-22 | 2016-11-23 | 苏州纽威阀门股份有限公司 | A kind of hard seal butterfly valve |
| CN107701798A (en) * | 2017-11-15 | 2018-02-16 | 陈风琴 | A kind of valve with filtering function |
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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: 20130417 Termination date: 20181113 |