CN202834350U - Position indication device for movable sealing ring of water inlet valve in hydropower station - Google Patents
Position indication device for movable sealing ring of water inlet valve in hydropower station Download PDFInfo
- Publication number
- CN202834350U CN202834350U CN 201220474735 CN201220474735U CN202834350U CN 202834350 U CN202834350 U CN 202834350U CN 201220474735 CN201220474735 CN 201220474735 CN 201220474735 U CN201220474735 U CN 201220474735U CN 202834350 U CN202834350 U CN 202834350U
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- CN
- China
- Prior art keywords
- indicating arm
- sealing ring
- seal ring
- casing pipe
- 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
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- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The utility model discloses a position indication device for a movable sealing ring of a water inlet valve in a hydropower station. A plunger type indicating arm is mounted in a casing pipe and compressed by springs. The head portion and the tail portion of the indicating arm extend out of the casing pipe, wherein the head portion always contacts the movable sealing ring and is in a follow-up action relation with the movable sealing ring, and an indicating disk is fixed on the tail portion through a bolt. The outer circumference of the casing pipe is provided with threads, and the casing pipe is fixed with a flange of a valve body in a screwed mode. The casing pipe is further provided with sealing rings, and the tail portion of the casing pipe is provided with a spring adjusting gland and a support frame. An annunciator is fixed on the support frame through a nut. The position indication device can send out two types of signals of different positions when the movable sealing ring is inserted or receded, can be assembled with the water inlet valve in an integral mode, and is convenient to install and adjust, simple and compact in structure and high in universality.
Description
Technical field
The utility model relates to a kind of water power plant inlet valve loose gland position indicator.
Background technique
The inlet valve loose gland is arranged in the enclosed space that valve body and counter flange surround, and when inlet valve was closed the water shutoff state, seal ring was shifted to valve, was adjacent to the water shutoff effect of playing with sealing seat; When the through-flow state of inlet valve, seal ring leaves valve, remains on the position of withdrawing from, and in the process that valve rotates, seal ring must remain on the position of withdrawing from.In the control program of inlet valve, the position monitoring of seal ring is extremely important, must prevent from when seal ring drops into rotating valve, to avoid the damage of mutually swiping of seal ring and valve sealing seat.In the locking of inlet valve and water turbine tail lock, also must monitor the position of seal ring, damage to prevent tail lock from bearing the pressure of upstream high pressure water.In case the damage of inlet valve sealing surface or the damage of tail lock occur, must carry out emptyingly just keeping in repair to whole ejectment water system, certainly will cause the part of generating units in power station to be affected and stop generating, these losses are huge.So the Focal point and difficult point in the always inlet valve design of the position monitoring problem of inlet valve seal ring this, be subject to Professional visitors's attention.
The position indicating structure of seal ring generally has at present: screw thread firmly connects follower structure and only withdraws from the non-contact structure of position sender, and these sealings are all unsatisfactory.Screw thread firmly connect follower structure need to be on seal ring processing screw hole, servo-actuated indicating arm is screwed into wherein, indicating arm moves forward and backward and the position is delivered to the outside of flange with seal ring, indicating arm in this structure is installed difficulty, and the rotating force impact that also can be subject to seal ring shortens the sealing life of indicating arm.Only withdraw from the non-contact structure of position sender, can only send the signal that seal ring withdraws from the position, can not send the signal that seal ring drops into the position, the advertiser Automation Elements are installed in the Seal cage, need to adjust and adjust inconvenience, occur easily impaired with direct contact of seal ring.
Summary of the invention
The purpose of this utility model provides a kind of water power plant inlet valve loose gland position indicator, makes it can send the signal that seal ring dropped into or withdrawed from two kinds of diverse locations, and indicating arm does not adopt screw thread firmly to be connected the impact of avoiding rotating force with seal ring.The purpose of this utility model is that structure is realized by the following technical programs: a kind of water power plant inlet valve loose gland position indicator, the plunger type indicating arm is installed in the sleeve pipe, the plunger type indicating arm is by spring compression, plunger type indicating arm head and afterbody stretch out sleeve pipe, plunger type indicating arm head all the time with movable sealing loop contacts and servo-actuated with seal ring, plunger type indicating arm afterbody is bolted an indication disk, the sleeve pipe excircle is threaded and adopts engage thread equipped fixing with valve flange, be provided with seal ring between sleeve pipe and the valve flange, be provided with seal ring between sleeve pipe and the plunger type indicating arm.The sleeve pipe afterbody arranges spring and adjusts gland, locking nut is set on the gland support is fixed, and advertiser is fixed on the support by nut.
The utility model advantage is: 1) can send the signal that seal ring dropped into or withdrawed from two kinds of diverse locations; 2) indicating arm does not adopt screw thread firmly to be connected with seal ring, avoids the impact of seal ring rotating force, the seal ring life; 3) this device self is a complete assembly (as shown in Figure 1), can wholely assemble with inlet valve, installs easy to adjust; 4) simple and compact for structure, versatility is good.
Description of drawings
Fig. 1: overall structure figure of the present utility model.
Fig. 2: show that seal ring is in the location status when dropping into the position.
Fig. 3: show that seal ring is in the location status when withdrawing from the position.
Embodiment
A kind of water power plant inlet valve loose gland position indicator as shown in Figure 1, plunger type indicating arm 4 is installed in the sleeve pipe 3, plunger type indicating arm 4 is compressed by spring 5, plunger type indicating arm 4 heads and afterbody stretch out sleeve pipe 3, plunger type indicating arm 4 heads contact with loose gland 13 all the time and are servo-actuated with seal ring, plunger type indicating arm 4 afterbodys are fixed an indication disk 11 by bolt 12, sleeve pipe 3 excircles are threaded and adopt engage thread equipped fixing with valve flange 14, as shown in Figures 2 and 3, be provided with seal ring 1 between sleeve pipe 3 and the valve flange 14, be provided with seal ring 2 between sleeve pipe 3 and the plunger type indicating arm 4.Sleeve pipe 3 afterbodys arrange spring and adjust gland 7, and it is fixing with support 8 that locking nut 6 is set on the gland, and advertiser 9 is fixed on the support 8 by nut 10.
As shown in Figures 2 and 3, during installation advertiser 9 is adjusted to the position that needs, be fixed on the support 8 by nut 10, head points indication disk 11, advertiser adopts approach switch, when indication disk 11 moves closer to advertiser 9 heads to special position with indicating arm, sends electric signal.
Claims (1)
1. water power plant inlet valve loose gland position indicator, it is characterized in that: plunger type indicating arm (4) is installed in the sleeve pipe (3), plunger type indicating arm (4) is compressed by spring (5), plunger type indicating arm (4) head and afterbody stretch out sleeve pipe (3), plunger type indicating arm (4) head contacts with loose gland (13) all the time and is servo-actuated with seal ring, plunger type indicating arm (4) afterbody is fixed an indication disk (11) by bolt (12), sleeve pipe (3) excircle is threaded and adopts engage thread equipped fixing with valve flange (14), be provided with seal ring (1) between sleeve pipe (3) and the valve flange (14), be provided with seal ring (2) between sleeve pipe (3) and the plunger type indicating arm (4), sleeve pipe (3) afterbody arranges spring and adjusts gland (7), it is fixing with support (8) that locking nut (6) is set on the gland, and advertiser (9) is fixed on the support (8) by nut (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474735 CN202834350U (en) | 2012-09-18 | 2012-09-18 | Position indication device for movable sealing ring of water inlet valve in hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220474735 CN202834350U (en) | 2012-09-18 | 2012-09-18 | Position indication device for movable sealing ring of water inlet valve in hydropower station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202834350U true CN202834350U (en) | 2013-03-27 |
Family
ID=47946058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220474735 Expired - Fee Related CN202834350U (en) | 2012-09-18 | 2012-09-18 | Position indication device for movable sealing ring of water inlet valve in hydropower station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202834350U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005389A (en) * | 2014-05-15 | 2014-08-27 | 国家电网公司 | Device and method for opening water inlet valve, device and method for closing water inlet valve and water inlet valve control system |
| CN110886898A (en) * | 2019-12-03 | 2020-03-17 | 国家电网有限公司 | Device for detecting position of sliding sealing ring of water inlet ball valve and application method thereof |
-
2012
- 2012-09-18 CN CN 201220474735 patent/CN202834350U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005389A (en) * | 2014-05-15 | 2014-08-27 | 国家电网公司 | Device and method for opening water inlet valve, device and method for closing water inlet valve and water inlet valve control system |
| CN110886898A (en) * | 2019-12-03 | 2020-03-17 | 国家电网有限公司 | Device for detecting position of sliding sealing ring of water inlet ball valve and application method thereof |
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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: 20130327 Termination date: 20170918 |