CN103697228A - Device capable of indicating packing compression status of valve stem - Google Patents
Device capable of indicating packing compression status of valve stem Download PDFInfo
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- CN103697228A CN103697228A CN201310699589.4A CN201310699589A CN103697228A CN 103697228 A CN103697228 A CN 103697228A CN 201310699589 A CN201310699589 A CN 201310699589A CN 103697228 A CN103697228 A CN 103697228A
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- Prior art keywords
- filler
- end surface
- gland
- guide cylinder
- indication
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention relates to a device capable of indicating the packing compression status of a valve stem. The device comprises a fastening part, a compressioncover, an elastic assembly, a packing compression cylinder and a guide cylinder, wherein one end of the packing compression cylinder acts onto the compression packing in a packing box, the guide cylinder is fixed to the other end of the packing compression cylinder, the elastic assembly is sleeved onto the guide cylinder, one end of the elastic assembly contacts with the packing compression cylinder, the other end of the elastic assembly contacts with the lower end surface of the compression cover, and the fastening part is fixed on the compression cover and acts onto the compression packing in the packing box through the compression cover, the elastic assembly and the packing compression cylinder. The device further comprises an indication assembly which comprises an annular groove arranged on the guide cylinder and a pointer arranged on the upper end surface of the compression cover. The device solves the technical problem that the existing device does not have the indication assembly and cannot indicate the packing compression status, and can provide clear information whether the packing compression status is appropriate in order to prevent overpressure or pressure shortage of the packing and prolong service life and maintenance period of the packing.
Description
Technical field
The present invention relates to the valve stem seal of valve, particularly with the device of indicating stem packing impaction state.
Background technique
Material filling type valve stem seal is the valve rod leak-proof structure extensively adopting at present, in order to control the impacting force of filler, conventionally adopt " filler+belleville spring " structure, by compression belleville spring, provide required impacting force for packing seal, both can guarantee that impacting force was relatively constant, again can auto-compensation reduce because of the Sealing Stress that creep, wearing and tearing etc. causes.For existing stem packing sealing configuration, because filler impaction state is without indicating structure, when assembling, use, filler impacting force mainly relies on operator's experience to determine, personal factor impact is larger, easily occur that because filler is under-voltage, shortening maintenance period even causes dielectric leakage, or occur filler overvoltage and aggravate filler wearing and tearing, shorten the working life of filler, and increase valve drive forces square.
Summary of the invention
In order to solve the existing filler impaction state that lacks without indicating device, cannot accurately reach the suitable impaction state of filler, affect the technical problem of filler using effect, the invention provides a kind of device with indication stem packing impaction state, the clear and definite information whether filler impaction state is suitable can be provided, prevent filler overvoltage or under-voltage, extend filler life-span and maintenance period.
Technical solution of the present invention:
A device with indication stem packing impaction state, comprises fastening piece 8, gland 6, elastic component, filler pressure cylinder 2 and guide cylinder 3,
One end of described filler pressure cylinder 2 acts on the compression filler 1 in stuffing box, the other end of described filler pressure cylinder 2 is fixed with guide cylinder 3, described elastic component is sleeved on guide cylinder 3, described elastic component one end contacts with filler pressure cylinder 2, the other end of described elastic component contacts with gland 6 lower end surfaces, described fastening piece 8 is fixed on gland, and described fastening piece 8 acts on the compression filler 1 in stuffing box by gland, elastic component, filler pressure cylinder 2
Also comprise indication component, described indication component comprises the circular groove 7 being arranged on guide cylinder and the pointer that is arranged on gland 6 upper-end surfaces,
Definition: the upper-end surface of guide cylinder 3 is zero-bit index plane 7A, the lower end surface of circular groove is the maximum graduation indication face 7B that compresses, the upper-end surface of circular groove is the minimum graduation indication face 7C that compresses;
Meet the following conditions: the upper-end surface of guide cylinder 3 keeps concordant with the upper-end surface of gland 6 in original state;
Zero-bit index plane 7A and the minimum crow flight distance compressing between graduation indication face 7C
Zero-bit index plane 7A and the maximum crow flight distance compressing between graduation indication face 7B
Wherein: suffered medium active force on F-filler cross section, F=PA;
The working pressure of P-valve;
The cross-section area of A-filler;
F
maxmaximum impacting force, the F of allowing of filler of-setting
max=aF;
F
minthe minimum impacting force of filler of-setting, F
min=bF;
A-coefficient, generally gets 2～3, in particular cases also needs suitably to increase according to the essential seal pressure of filler;
B-coefficient, generally gets 1～1.5, in particular cases also needs suitably to increase according to the essential seal pressure of filler;
The rigidity of K-elastic component.
Comprise adjustment pad, described adjustment pad, between elastic component and filler pressure cylinder, keeps concordant for adjusting the upper-end surface of guide cylinder 3 with the upper-end surface of gland 6 in original state.
Above-mentioned pointer is gland 6 upper-end surfaces or is fixed on the label on upper-end surface.
Above-mentioned zero-bit index plane 7A, the maximum graduation indication face 7B of compression and minimum compression on graduation indication face 7C are provided with scale groove or label.
Above-mentioned elastic component is butterfly spring 5, and K is the rigidity of butterfly spring 5.
A kind of device with indication stem packing impaction state, comprise fastening piece 8, gland 6, elastic component, filler pressure cylinder 2, guide cylinder 3, one end of described filler pressure cylinder 2 acts on the filler 1 in stuffing box, the other end of described filler pressure cylinder 2 contacts with gland 6 lower end surfaces, described fastening piece 8 is fixed on gland, between described fastening piece 8 and gland 6, be provided with guide cylinder 3, elastic component is sleeved on guide cylinder 3, described elastic component one end contacts with gland, the other end contacts with the spring seat of guide cylinder upper-end surface, described fastening piece 8 passes through elastic component, gland, filler pressure cylinder 2 acts on the filler 1 in stuffing box,
Also comprise indication component, described indication component comprises the pointer that is arranged on the circular groove on guide cylinder and is arranged on gland 6 lower end surfaces;
Definition: the lower end surface of guide cylinder 3 is zero-bit index plane 7A, the upper-end surface of circular groove is the maximum graduation indication face 7B that compresses, the lower end surface of circular groove is the minimum graduation indication face 7C that compresses;
Meet the following conditions: the lower end surface of guide cylinder 3 keeps concordant with the lower end surface of gland 6 in original state;
Zero-bit index plane 7A and the minimum crow flight distance compressing between graduation indication face 7C
Zero-bit index plane 7A and the maximum crow flight distance compressing between graduation indication face 7B
Wherein: suffered medium active force on F-filler cross section, F=PA;
The working pressure of P-valve;
The cross-section area of A-filler;
F
maxmaximum impacting force, the F of allowing of filler of-setting
max=aF;
F
minthe minimum impacting force of filler of-setting, F
min=bF;
A-coefficient, gets 2～3;
B-coefficient, gets 1～1.5;
The rigidity of K-butterfly spring.
Comprise and adjust pad 4, described adjustment pad is between gland and elastic component, concordant with the lower end surface maintenance of gland 6 in original state for adjusting the lower end surface of guide cylinder 3.
Above-mentioned pointer is gland 6 upper-end surfaces or is fixed on the label on upper-end surface.
Above-mentioned zero-bit index plane 7A, the maximum graduation indication face 7B of compression and minimum compression on graduation indication face 7C are provided with scale groove or label.
Above-mentioned elastic component is butterfly spring 5, and K is the rigidity of butterfly spring 5.
The present invention compared with prior art tool has the following advantages:
1, filler impaction state indicating structure of the present invention, on existing filling-material structure basis, increased filler impaction state indicating structure, the clear and definite information whether filler impaction state is suitable can be provided, convenient operation personnel regular maintenance, avoid the under-voltage or overvoltage phenomenon of filler, can extend the working life of filler.
2, relatively existing filling-material structure, by accurate calculating and experience, only to part appropriate change, simple in structure.
Accompanying drawing explanation
Fig. 1 is the pointer schematic diagram concordant with zero graduation index plane during filler malcompression in embodiment 1;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the maximum schematic diagram that compresses graduation indication face of pointed while compressing filler in embodiment 1;
Fig. 4 is the partial enlarged drawing of Fig. 3;
Fig. 5 is the position relationship schematic diagram of pointer and graduation indication face while needing again to compress filler in embodiment 1;
Fig. 6 be in embodiment 2 during filler malcompression through adjusting the position relationship schematic diagram of backpointer and zero graduation index plane;
Fig. 7 is the partial enlarged drawing of Fig. 6;
Fig. 8 is pointer and the maximum position relationship schematic diagram that compresses graduation indication face while compressing filler in embodiment 2;
Fig. 9 is the partial enlarged drawing of Fig. 8;
Figure 10 is the position relationship schematic diagram of pointer and graduation indication face while needing again to compress filler in embodiment 2.
Embodiment
Stem packing sealing impaction state indicating structure of the present invention is by being with graduated belleville spring guide cylinder, pointer, regulating device to form.The decrement of the relative position indication belleville spring of pointer and graduation indication face, namely belleville spring acts on the impacting force on filler.Graduation indication face on belleville spring guide cylinder comprises that zero graduation index plane, correspondence that corresponding filler impacting force is 0 guarantee that the minimum compression graduation indication face of the minimal design impacting force that packing seal requires and the maximum of the design maximum impacting force that corresponding filler allows compress graduation indication face.Minimum compress graduation indication face and maximumly compress endless belt color between graduation indication face for having the conspicuous color of obvious difference with other parts of indicating graduation, for to reasonable impacting force with eye-catching and clear and definite indication, be convenient to observe filler impaction state.Pointer and scale, can adopt fixedly label, directly the mode such as stamp or machining realizes.
Valve when assembling, use regulating device to guarantee that at filler, compressing prior pointer points to zero graduation index plane (being that primary face is concordant with zero graduation index plane), then compress filler and make pointer concordant with maximum compression graduation indication face.When valve is used, when pointer compresses graduation indication face and maximum while compressing interval between graduation indication face in the minimum showing by conspicuous color, represent that filler impaction state is suitable; When pointed minimum compresses between graduation indication face and zero graduation index plane, represent that filler impacting force is not enough, should again compress filler until make pointer again point to maximum compression graduation indication face.
Embodiment 1
As shown in Figure 1, 2, this packing seal structure is compressed belleville spring 5 by fastening piece 8 by compressing Gland 6 to embodiment 1, and the deformation force of belleville spring 5 acts on filler pressure cylinder 2, and compresses filler 1, wherein filler pressure cylinder 2 with guide cylinder 3 for being fixedly connected with.
Specifically being implemented as follows of the filler impaction state indicating structure of this packing seal structure: on guide cylinder 3, with machining process, form a circular groove 7, and at the eye-catching pigment of the interior filling of circular groove 7.The lower end surface of circular groove 7 is the maximum graduation indication face 7B that compresses, and the upper-end surface of circular groove is the minimum graduation indication face 7C that compresses, and the upper-end surface of guide cylinder 3 is zero graduation index plane 7A, and the upper surface of Gland 6 is pointer 6A.Compress before filler 1, by increasing or reduce the usage quantity of adjusting pad 4, the manufacturing tolerances of compensation correlated parts, makes the zero graduation 7A of guide cylinder 3 and the pointer 6A of Gland 6 concordant, as shown in Figure 1.
When needs compress filler 1, the maximum that makes the pointer 6A of Gland 6 move to guide cylinder 3 by screwing fastening piece 8 compresses graduation indication face 7B, as shown in Figure 3,4.
When filler being relaxed because of filler creep or wearing and tearing, the minimum that the pointer 6A of gland 6 can move to guide cylinder 3 compresses the position between graduation indication face 7C and zero graduation index plane 7A, as shown in Figure 5, now need to compress filler 1 until the pointer 6A of gland 6 moves to the maximum compression graduation indication face 7B of guide cylinder 3 again, as shown in Figure 1.
As shown in Figure 6,7, this packing seal structure adopts small-sized belleville spring 5, is arranged on fastening piece 8, by fastening piece 8, directly compresses belleville spring 5, and the distortion force action of some groups of belleville springs 5, to Gland 6, and compresses fillers 1 by filler pressure cylinder 2.
Specifically being implemented as follows of the filler impaction state indicating structure of this packing seal structure: be all provided with identical impaction state indicating structure on the hold down gag that each group is comprised of fastening piece 8 and belleville spring 5.On guide cylinder 3, adopt machining process to form a circular groove 7, and at the eye-catching pigment of the interior filling of circular groove 7.The upper-end surface of circular groove 7 is the maximum graduation indication face 7B that compresses, and the lower end surface of circular groove is the minimum graduation indication face 7C that compresses, and the lower end surface of guide cylinder 3 is zero graduation index plane 7A, and the lower surface of Gland 6 is pointer 6A.Compress before filler 1, by increasing or reduce the usage quantity of adjusting pad 4, the manufacturing tolerances of compensation correlated parts, makes the zero graduation index plane 7A of guide cylinder 3 and the lower end surface pointer 6A of Gland 6 concordant.
When needs compress filler 1, by screwing fastening piece 8, guide cylinder 3 is moved down, the maximum that realizes the pointer 6A sensing of Gland 6 compresses graduation indication face 7B, as shown in Figure 8,9.
When filler being relaxed because of filler creep or wearing and tearing, the minimum that the pointer 6A of gland 6 can point to guide cylinder 3 compresses the position between graduation indication face 7C and zero graduation index plane 7A, as shown in figure 10, now need to compress filler 1 until the pointer 6A of gland 6 points to the maximum compression graduation indication face 7B of guide cylinder 3 again.
Zero-bit index plane 7A and the minimum crow flight distance compressing between graduation indication face 7C
Zero-bit index plane 7A and the maximum crow flight distance compressing between graduation indication face 7B
Wherein: suffered medium active force on F-filler cross section, F=PA;
The working pressure of P-valve;
The cross-section area of A-filler;
F
maxmaximum impacting force, the F of allowing of filler of-setting
max=aF;
F
minthe minimum impacting force of filler of-setting, F
min=bF;
A-coefficient, generally gets 2～3, in particular cases also needs suitably to increase according to the essential seal pressure of filler;
B-coefficient, generally gets 1～1.5, in particular cases also needs suitably to increase according to the essential seal pressure of filler;
The rigidity of K-elastic component.
Above-mentioned two embodiments are only the possible mode of execution of patent of the present invention, but design concept of the present invention is not limited to this, and all unsubstantialities that the present invention is carried out are changed and all should be belonged to the behavior of invading scope of patent protection of the present invention.
Claims (10)
1. with a device for indication stem packing impaction state, comprise fastening piece (8), gland (6), elastic component, filler pressure cylinder (2) and guide cylinder (3),
One end of described filler pressure cylinder (2) acts on the compression filler (1) in stuffing box, the other end of described filler pressure cylinder (2) is fixed with guide cylinder (3), described elastic component is sleeved on guide cylinder (3), described elastic component one end contacts with filler pressure cylinder (2), the other end of described elastic component contacts with gland (6) lower end surface, described fastening piece (8) is fixed on gland, described fastening piece (8) acts on the compression filler (1) in stuffing box by gland, elastic component, filler pressure cylinder (2)
It is characterized in that: also comprise indication component, described indication component comprises the circular groove (7) being arranged on guide cylinder and the pointer that is arranged on gland (6) upper-end surface,
Definition: the upper-end surface of guide cylinder (3) is zero-bit index plane (7A), the lower end surface of circular groove is the maximum graduation indication face (7B) that compresses, the upper-end surface of circular groove is the minimum graduation indication face (7C) that compresses;
Meet the following conditions: the upper-end surface of guide cylinder (3) keeps concordant with the upper-end surface of gland (6) in original state;
Zero-bit index plane (7A) and the minimum crow flight distance compressing between graduation indication face (7C)
Zero-bit index plane (7A) and the maximum crow flight distance compressing between graduation indication face (7B)
Wherein: suffered medium active force on F-filler cross section, F=PA;
The working pressure of P-valve;
The cross-section area of A-filler;
F
maxmaximum impacting force, the F of allowing of filler of-setting
max=aF;
F
minthe minimum impacting force of filler of-setting, F
min=bF;
A-coefficient, gets 2-3;
B-coefficient, gets 1-1.5;
The rigidity of K-elastic component.
2. the device with indication stem packing impaction state according to claim 1, it is characterized in that: comprise adjustment pad, described adjustment pad, between elastic component and filler pressure cylinder, keeps concordant for adjusting the upper-end surface of guide cylinder (3) with the upper-end surface of gland (6) in original state.
3. the device with indication stem packing impaction state according to claim 1 and 2, is characterized in that: described pointer is gland (6) upper-end surface or is fixed on the label on upper-end surface.
4. the device with indication stem packing impaction state according to claim 3, is characterized in that: described zero-bit index plane (7A), maximum compression on graduation indication face (7B) and minimum compression graduation indication face (7C) are provided with scale groove or label.
5. the device with indication stem packing impaction state according to claim 4, is characterized in that: described elastic component is butterfly spring (5), and K is the rigidity of butterfly spring (5).
6. the device with indication stem packing impaction state, comprise fastening piece (8), gland (6), elastic component, filler pressure cylinder (2), guide cylinder (3), one end of described filler pressure cylinder (2) acts on the filler (1) in stuffing box, the other end of described filler pressure cylinder (2) contacts with gland (6) lower end surface, described fastening piece (8) is fixed on gland, between described fastening piece (8) and gland (6), be provided with guide cylinder (3), elastic component is sleeved on guide cylinder (3), described elastic component one end contacts with gland, the other end contacts with the spring seat of guide cylinder upper-end surface, described fastening piece (8) passes through elastic component, gland, filler pressure cylinder (2) acts on the filler (1) in stuffing box,
It is characterized in that: also comprise indication component, described indication component comprises the pointer that is arranged on the circular groove on guide cylinder and is arranged on gland (6) lower end surface;
Definition: the lower end surface of guide cylinder (3) is zero-bit index plane (7A), the upper-end surface of circular groove is the maximum graduation indication face (7B) that compresses, the lower end surface of circular groove is the minimum graduation indication face (7C) that compresses;
Meet the following conditions: the lower end surface of guide cylinder (3) keeps concordant with the lower end surface of gland (6) in original state;
Zero-bit index plane (7A) and the minimum crow flight distance compressing between graduation indication face (7C)
Zero-bit index plane (7A) and the maximum crow flight distance compressing between graduation indication face (7B)
Wherein: suffered medium active force on F-filler cross section, F=PA;
The working pressure of P-valve;
The cross-section area of A-filler;
F
maxmaximum impacting force, the F of allowing of filler of-setting
max=aF;
F
minthe minimum impacting force of filler of-setting, F
min=bF;
A-coefficient, gets 2-3;
B-coefficient, gets 1-1.5;
The rigidity of K-butterfly spring.
7. the device with indication stem packing impaction state according to claim 6, it is characterized in that: comprise and adjust pad (4), described adjustment pad, between gland and elastic component, keeps concordant for adjusting the lower end surface of guide cylinder (3) with the lower end surface of gland (6) in original state.
8. according to the device with indication stem packing impaction state described in claim 6 or 7, it is characterized in that: described pointer is gland (6) upper-end surface or is fixed on the label on upper-end surface.
9. the device with indication stem packing impaction state according to claim 8, is characterized in that: described zero-bit index plane (7A), maximum compression on graduation indication face (7B) and minimum compression graduation indication face (7C) are provided with scale groove or label.
10. the device with indication stem packing impaction state according to claim 9, is characterized in that: described elastic component is butterfly spring (5), and K is the rigidity of butterfly spring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310699589.4A CN103697228B (en) | 2013-12-18 | 2013-12-18 | A kind of device with instruction stem packing impaction state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310699589.4A CN103697228B (en) | 2013-12-18 | 2013-12-18 | A kind of device with instruction stem packing impaction state |
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| Publication Number | Publication Date |
|---|---|
| CN103697228A true CN103697228A (en) | 2014-04-02 |
| CN103697228B CN103697228B (en) | 2015-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310699589.4A Active CN103697228B (en) | 2013-12-18 | 2013-12-18 | A kind of device with instruction stem packing impaction state |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5230498A (en) * | 1990-10-09 | 1993-07-27 | Fisher Controls International, Inc. | Live load packing system |
| DE4404919C2 (en) * | 1994-02-16 | 1996-10-17 | Burgmann Dichtungswerk Feodor | Arrangement for the prestressing assembly of sealing packs by means of a pressure cover in an annular cylindrical receiving space of a housing wall for sealing a valve spindle of a shut-off or control valve |
| US20050210648A1 (en) * | 2003-11-26 | 2005-09-29 | Gary Putnam | Load applying tool and method |
| CN101975279A (en) * | 2010-11-03 | 2011-02-16 | 淄博汇华阀业有限公司 | Early warning stop valve |
| CN102235547A (en) * | 2011-07-22 | 2011-11-09 | 世林（漯河）冶金设备有限公司 | Blast furnace connecting rod type cutting butterfly valve packing seal structure |
| CN102758964A (en) * | 2012-07-11 | 2012-10-31 | 南通高中压阀门有限公司 | Low-loss self-compensating system for filler loss |
| CN202646902U (en) * | 2012-06-14 | 2013-01-02 | 南通高中压阀门有限公司 | Valve rod filling loss display device |
-
2013
- 2013-12-18 CN CN201310699589.4A patent/CN103697228B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5230498A (en) * | 1990-10-09 | 1993-07-27 | Fisher Controls International, Inc. | Live load packing system |
| DE4404919C2 (en) * | 1994-02-16 | 1996-10-17 | Burgmann Dichtungswerk Feodor | Arrangement for the prestressing assembly of sealing packs by means of a pressure cover in an annular cylindrical receiving space of a housing wall for sealing a valve spindle of a shut-off or control valve |
| US20050210648A1 (en) * | 2003-11-26 | 2005-09-29 | Gary Putnam | Load applying tool and method |
| CN101975279A (en) * | 2010-11-03 | 2011-02-16 | 淄博汇华阀业有限公司 | Early warning stop valve |
| CN102235547A (en) * | 2011-07-22 | 2011-11-09 | 世林（漯河）冶金设备有限公司 | Blast furnace connecting rod type cutting butterfly valve packing seal structure |
| CN202646902U (en) * | 2012-06-14 | 2013-01-02 | 南通高中压阀门有限公司 | Valve rod filling loss display device |
| CN102758964A (en) * | 2012-07-11 | 2012-10-31 | 南通高中压阀门有限公司 | Low-loss self-compensating system for filler loss |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Publication date |
|---|---|
| CN103697228B (en) | 2015-10-21 |
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