CN203363259U - Hard sealing structure for high oil pressure operation of hydropower station inlet ball valve - Google Patents
Hard sealing structure for high oil pressure operation of hydropower station inlet ball valve Download PDFInfo
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- CN203363259U CN203363259U CN 201320463126 CN201320463126U CN203363259U CN 203363259 U CN203363259 U CN 203363259U CN 201320463126 CN201320463126 CN 201320463126 CN 201320463126 U CN201320463126 U CN 201320463126U CN 203363259 U CN203363259 U CN 203363259U
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- seal ring
- valve
- ball valve
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Abstract
The utility model discloses a hard sealing structure for high oil pressure operation of a hydropower station inlet ball valve. The hard sealing structure comprises a sealing ring (2) and a guide ring (3) which are sequentially arranged at a valve end opening, wherein a square ring (5) for a hole, a sand retaining sealing ring (6) and a guide ring (7) are sequentially arranged between two matched annular planes of the guide ring (3) and the sealing ring (2); a guide ring (7), a sand retaining sealing ring (6) and a square ring (5) for a hole are sequentially arranged between two matched annular planes of a valve body (1) and the sealing ring (2); a square ring (5) for a hole is arranged between the inner surface of a groove (8) and the outer surface of the rib of the sealing ring (2). The hard sealing structure has the beneficial effects of being reliable and simple in arrangement, long in service life, low in failure rate, even free of maintenance, light in weight, easy and fast to manufacture, low in cost, and convenient to install and maintain; the sand retaining sealing rings can keep sediments and dirt from entering the ball valve; the guide rings can avoid the unsteady action and even the blockage of the sealing ring.
Description
Technical field
The utility model relates to the high hydraulic operation hard sealing structure of ball valve sealing structure technical field, particularly hydropower station water inlet ball valve.
Background technique
The water power plant inlet valve is arranged between penstock and spiral case; block the equipment of current during as startup of unit, unit phase modulation and unit orderly closedown and accidental shutdown; particularly at accidental shutdown hydraulic generator unit in the state of overrunning; when unit can't be closed; now throttle down blocks the current protected host; therefore hydropower station water inlet ball valve is the key equipment that water power plant arranges, and the ball valve safe and reliable operation is extremely important.
Hydropower station water inlet ball valve work and maintenance sealing all adopt stainless steel metal firmly to seal, work, the action of maintenance seal ring adopt oil pressure actuated, conventional structure operation oil pressure adopts 4.0MPa or 6.3MPa, but need the workplace air compression system, the power station cost of investment is high, air compression system line arrangement complexity.Along with scientific and technical development, the workplace air compression system has been cancelled in a lot of power stations, and hydraulic station adopts the accumulation of energy pot type, and the oil pressure grade is generally 16MPa.Because the operation oil pressure significantly improves, a lot of power station ball valve work and the design of maintenance seal ring seal pattern are unreasonable, sealing material is selected bad, valve body, seal ring stiffness are controlled bad, cause occurring that seal ring alters oil, channeling water, even seal ring is suppressed dead phenomenon, brings very large hidden danger to power plant safety stable operation, and this problem is urgently to be resolved hurrily.
The model utility content
The purpose of this utility model is to overcome the shortcoming of prior art, and the high hydraulic operation hard sealing structure of hydropower station water inlet ball valve of a kind of simple in structure, reliable, long service life, failure rate is low is provided.
The purpose of this utility model is achieved through the following technical solutions: the high hydraulic operation hard sealing structure of hydropower station water inlet ball valve, it comprises along from the valve body inboard to the valve body lateral direction, being installed on successively seal ring and the lead ring of valve port, the circumferential exterior surface of seal ring consists of two planar annulars and an annular ridge that is arranged at two planar annulars centres, on the internal surface of lead ring and valve body, be provided with and the close-fitting planar annular of the planar annular of seal ring respective side, between two planar annulars that lead ring matches with seal ring, edge sets gradually the porose square ring of using from the valve body inboard to the valve body lateral direction, sand seal ring and guide ring, between two planar annulars that valve body matches with seal ring, edge is disposed with guide ring from the valve body inboard to the valve body lateral direction, sand seal ring and hole square ring, be provided with the groove of accommodating annular ridge between lead ring and valve body, the circumferential inner surface of groove and the circumferential exterior surface of fin closely cooperate, the porose square ring of using is set between the circumferential inner surface of groove and the circumferential exterior surface of fin, the width of groove is greater than the width of fin, the arc shaped surface of the interior edge face of lead ring for matching with the valve of ball valve.
Form hydraulic operation between the fin of described seal ring and lead ring and close chamber, forming hydraulic operation between the fin of seal ring and valve body begins to speak, be provided with on lead ring and be communicated with the oil inlet passage A that hydraulic operation closes chamber, be provided with on valve body and be communicated with the oil inlet passage B that hydraulic operation is begun to speak.
The outside of described lead ring also is equipped with end cap, is provided with the pilot hole of perforation on end cap and lead ring, and position limit switch is connected with guide ring after running through pilot hole.
The utlity model has following advantage:
After the utility model has solved the high hydraulic operation system of water power plant employing 16MPa, oily channeling water appears altering in water intake ball valve work and maintenance seal ring, and even seal ring is suppressed dead problem, for reliable steady in a long-term operation of power plant safety provides strong technical support.
The utility model is cancelled traditional D type circle and O RunddichtringO pattern, adopt the large hole square ring of compression compensation amount, decrement is 2～3 times of conventional seal style, even valve body, seal ring, lead ring etc. produce distortion under the high oil pressure of 16MPa and high hydraulic pressure synergy, also can effective compensation and do not affect sealing effect; The seal ring both sides are provided with the sand seal ring, effectively avoid silt and dirt in water to enter the operation oil pocket, pollute oil, the wearing and tearing seal ring; Guide ring is set on seal ring, avoids the high oil pressure effect seal ring action dead phenomenon of steadily even not spraining.
The utility model reliable in structure, long service life, failure rate is low even can be realized non-maintaining; Simple in structure, lightweight, to manufacture simple and easy fast, cost is low; Convenient for installation and maintenance.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model
Fig. 2 is for adopting the structural representation of hydropower station water inlet ball valve of the present utility model
In figure, 1-valve body, 2-seal ring, the 3-lead ring, 4-fin, 5-hole square ring, 6-sand seal ring, 7-guide ring, 8-groove, 9-oil inlet passage A, 10-oil inlet passage B, 11-end cap, the 12-pilot hole, 13-position limit switch, 14-valve, 15-working seal structure, 16-maintenance sealing structure, 17-servomotor.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described, protection domain of the present utility model is not limited to the following stated:
As Fig. 1, shown in Fig. 2, the high hydraulic operation hard sealing structure of hydropower station water inlet ball valve, it comprises along from valve body 1 inboard to valve body 1 lateral direction, being installed on successively seal ring 2 and the lead ring 3 of valve port, the circumferential exterior surface of seal ring 2 consists of two planar annulars and an annular ridge 4 that is arranged at two planar annulars centres, be provided with the close-fitting planar annular of planar annular with seal ring 2 respective side on the internal surface of lead ring 3 and valve body 1, porose with square ring 5 along setting gradually to valve body 1 lateral direction from valve body 1 inboard between two planar annulars that lead ring 3 matches with seal ring 2, sand seal ring 6 and guide ring 7, the width of the ring surface on lead ring 3 is greater than the width of the ring surface of seal ring 2 these sides, between two planar annulars that valve body 1 matches with seal ring 2, edge is disposed with guide ring 7 from valve body 1 inboard to valve body 1 lateral direction, sand seal ring 6 and square ring 5 for hole, be provided with the groove 8 of accommodating annular ridge 4 between lead ring 3 and valve body 1, the circumferential exterior surface of the circumferential inner surface of groove 8 and fin 4 closely cooperates, between the circumferential exterior surface of the circumferential inner surface of groove 8 and fin 4, arrange porose with square ring 5, the width of groove 8 is greater than the width of fin 4, the arc shaped surface of the interior edge face of lead ring 3 for matching with the valve 14 of ball valve.
3 of the fin 4 of described seal ring and lead rings form hydraulic operation and close chamber, 1 of the fin 4 of seal ring and valve body form hydraulic operation and begin to speak, be provided with on lead ring 3 and be communicated with the oil inlet passage A9 that hydraulic operation closes chamber, be provided with on valve body 1 and be communicated with the oil inlet passage B10 that hydraulic operation is begun to speak.
The outside of described lead ring 3 also is equipped with end cap 11, is provided with the pilot hole 12 of perforation on end cap 11 and lead ring 3, and position limit switch 13 is connected with guide ring 7 after running through pilot hole 12.
Sand seal ring 6 and hole adopt the high molecular abrasion-proof material with square ring 5.
As shown in Figure 2, hydropower station water inlet ball valve is comprised of valve body 1, valve 14, working seal structure 15, maintenance sealing structure 16, servomotor 17 etc.Ball valve switch is to drive servomotor 17 oil pressure to control valve 14 switches by control cabinet and oil pressure unit, puts in place when valve 14 closes, then controls driving work by oil pressure and overhaul seal ring 2 and close and put in place, reaches the effect of blocking current.
The maintenance sealing structure 16 of upstream side comprises that, along upstream side valve body 1 outside sets gradually from valve body 1 inside seal ring 2 and lead ring 3, the working seal structure 15 in downstream side comprises along side valve body 1 outside sets gradually downstream from valve body 1 inside seal ring 2 and lead ring 3.Maintenance sealing structure 16 and working seal structure 15 all adopt the high hydraulic operation hard sealing structure of hydropower station water inlet ball valve as above.
If maintenance sealing structure 16 and enough employing of working seal knot have sealing configuration now, valve body 1, seal ring 2, lead ring 3 etc. produce distortion under the high oil pressure of 16MPa and high hydraulic pressure synergy, produce following consequence:
If the seal ring seal compression quantity not sufficient on 1 seal ring 2, sealing effect is poor, will produce the oil mixing with water phenomenon, and whole oil pressure control system lubricant oil all pollutes, and now must shut down maintenance, to power station, brings economic loss; Secondly the oil of Seal cage is scurried in runner water, polluted source; Its three seal rings, 2 switch cavities are altered oil and are caused seal ring 2 trippings;
2, because valve body 1, seal ring 2 produce distortion, seal ring 2 moves under oil pressure actuated, due to oil pressure grade 16MPa, seal ring 2 active forces are large, can produce asynchrony phenomenon during seal ring 2 action, even between seal ring 2 and valve body 1, lead ring 3, sprain dead, kill phenomenon, process and bring very large difficulty to valve;
3,, because oil pressure is too high, between valve body 1 and lead ring 3, fixedly the selection of O RunddichtringO material is unreasonable also may produce oil leakage phenomenon.
And adopt the high hydraulic operation hard sealing structure of above-mentioned hydropower station water inlet ball valve, can avoid the generation of the problems referred to above:
1, the seal ring on seal ring 2 adopts the high molecular abrasion-proof material, anti-aging, long service life, effectively prolonging overhaul interval;
2, cancel traditional D type circle and O RunddichtringO pattern, adopt the large square ring 5 for hole of compression compensation amount, decrement is 2～3 times of conventional seal style, even valve body 1, seal ring 2, lead ring 3 etc. produce distortion under the high oil pressure of 16MPa and high hydraulic pressure synergy, also can effective compensation and do not affect sealing effect;
3, on seal ring 2, guide ring 7 is set, avoids the high oil pressure effect seal ring 2 actions dead phenomenon of steadily even not spraining;
4, between valve body 1 and lead ring 3, fixedly O RunddichtringO tradition employing oil-resistant rubber ring is bonding, now adopts whole circle high-quality oil-resistant rubber ring, has enough hardness, can bear the 16MPa oil pressure;
5, seal ring 2 both sides are provided with sand seal ring 6, effectively avoid silt and dirt in water to enter the operation oil pocket, pollute oil, the wearing and tearing seal ring.
Adopt finite element analysis software, to whole ball valve three-dimensional modeling, a plurality of operating conditionss are carried out finite element analysis and carry out structure optimization, the Rigidity and deformation amount of the parts such as valve body 1, valve 14, seal ring 2, lead ring 3 is controlled in the reasonable scope, avoided excessive amount of deformation to cause seal ring 2 to alter oily channeling water phenomenon.
Claims (3)
1. the high hydraulic operation hard sealing structure of hydropower station water inlet ball valve, it is characterized in that: it comprises along from valve body (1) inboard, being installed on successively seal ring (2) and the lead ring (3) of valve port to valve body (1) lateral direction, the circumferential exterior surface of seal ring (2) consists of two planar annulars and an annular ridge (4) that is arranged at two planar annulars centres, be provided with the close-fitting planar annular of planar annular with seal ring (2) respective side on the internal surface of lead ring (3) and valve body (1), porose with square ring (5) along setting gradually from valve body (1) inboard to valve body (1) lateral direction between two planar annulars that lead ring (3) matches with seal ring (2), sand seal ring (6) and guide ring (7), between two planar annulars that valve body (1) matches with seal ring (2), edge is disposed with guide ring (7) from valve body (1) is inboard to valve body (1) lateral direction, sand seal ring (6) and square ring (5) for hole, be provided with the groove (8) of accommodating annular ridge (4) between lead ring (3) and valve body (1), the circumferential exterior surface of the circumferential inner surface of groove (8) and fin (4) closely cooperates, between the circumferential exterior surface of the circumferential inner surface of groove (8) and fin (4), arrange porose with square ring (5), the width of groove (8) is greater than the width of fin (4), the arc shaped surface of the interior edge face of lead ring (3) for matching with the valve (14) of ball valve.
2. the high hydraulic operation hard sealing structure of hydropower station water inlet ball valve according to claim 1, it is characterized in that: form hydraulic operation between the fin of described seal ring (4) and lead ring (3) and close chamber, forming hydraulic operation between the fin of seal ring (4) and valve body (1) begins to speak, be provided with on lead ring (3) and be communicated with the oil inlet passage A(9 that hydraulic operation closes chamber), be provided with on valve body (1) and be communicated with the oil inlet passage B(10 that hydraulic operation is begun to speak).
3. the high hydraulic operation hard sealing structure of hydropower station water inlet ball valve according to claim 1, it is characterized in that: the outside of described lead ring (3) also is equipped with end cap (11), be provided with the pilot hole (12) of perforation on end cap (11) and lead ring (3), position limit switch (13) is connected with guide ring (7) after running through pilot hole (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320463126 CN203363259U (en) | 2013-07-31 | 2013-07-31 | Hard sealing structure for high oil pressure operation of hydropower station inlet ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320463126 CN203363259U (en) | 2013-07-31 | 2013-07-31 | Hard sealing structure for high oil pressure operation of hydropower station inlet ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN203363259U true CN203363259U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320463126 Expired - Fee Related CN203363259U (en) | 2013-07-31 | 2013-07-31 | Hard sealing structure for high oil pressure operation of hydropower station inlet ball valve |
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| CN (1) | CN203363259U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363145A (en) * | 2013-07-31 | 2013-10-23 | 东方电气集团东风电机有限公司 | Hydropower station inlet ball valve high oil pressure operation hard sealing structure |
-
2013
- 2013-07-31 CN CN 201320463126 patent/CN203363259U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363145A (en) * | 2013-07-31 | 2013-10-23 | 东方电气集团东风电机有限公司 | Hydropower station inlet ball valve high oil pressure operation hard sealing structure |
| CN103363145B (en) * | 2013-07-31 | 2016-09-07 | 东方电气集团东风电机有限公司 | Hydropower station water inlet ball valve height hydraulic operation hard sealing structure |
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| 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: 20131225 Termination date: 20190731 |