CN213579158U - Position detection device for sealing large ball valve of hydropower station - Google Patents
Position detection device for sealing large ball valve of hydropower station Download PDFInfo
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- CN213579158U CN213579158U CN202022399553.2U CN202022399553U CN213579158U CN 213579158 U CN213579158 U CN 213579158U CN 202022399553 U CN202022399553 U CN 202022399553U CN 213579158 U CN213579158 U CN 213579158U
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- ball valve
- rod
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- measuring staff
- measuring
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- 238000001514 detection method Methods 0.000 title claims abstract description 70
- 238000007789 sealing Methods 0.000 title claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 210000004907 gland Anatomy 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000000523 sample Substances 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model provides a position detection device for power station large-scale ball valve is sealed, the device includes the measuring staff steel bushing at least, the gauge rod, the triangle base, the spring sheath, measuring staff dog and sensor, the measuring staff steel bushing is installed in the prefabricated screw hole on the ball valve flange through the external screw thread at its middle part, the gauge rod alternates among the measuring staff steel bushing, the ball valve flange outside has the triangle base through base bolt fastening, in the measuring staff upper portion through the triangle base with the measuring staff upper portion shape assorted shoulder hole location, the measuring staff lower part is equipped with the measuring staff gauge head, the measuring staff gauge head is located the detection orifice department of valve body, a sensor support for installing the sensor is fixed in the tip of spring sheath, be provided with the measuring staff dog between measuring staff upper end and the reset spring, measuring staff gauge dog and reset spring direct contact. Compared with the prior art, the utility model, have the installation and maintain the convenience, the good reliability, advantage that the processing cost is low.
Description
Technical Field
The utility model relates to a position detection device for large-scale ball valve of power station is sealed belongs to and detects technical field.
Background
In the long water conduit hydropower station, a water inlet valve is generally arranged in front of a unit, a high-water head unit, particularly a pumped storage unit, is used for improving the capability of a main water inlet valve for isolating upstream side pressure water under various working conditions, and a large ball valve is mostly used as the main water inlet valve.
The ball valve is generally provided with the maintenance seal at the upstream side, the downstream side is provided with the work seal, the work seal drops into and keeps apart upstream side water source after the ball valve normally closes, the upstream sealing ring is installed inside the ball valve, can't judge its position state through audio-visual mode, can appear after sealed long-time action bite, fault such as off-centre, sealed when withdrawing from to detect not in place then the ball valve can't open, sealed when dropping into to detect not in place then the high-pressure water of ball valve upstream side can leak to the downstream side and initiate unsafe incident, position detection inaccurate can lead to the ball valve core damage accident when serious, seriously influence equipment safety and stability operation.
CN110886898A discloses a position detection device for a sliding sealing ring of a water inlet ball valve, wherein a casing of the device is a cavity structure with openings at two ends, a position switch guide rod is arranged in the casing, two ends of the position switch guide rod respectively extend out of the openings at two ends of the casing, one end of the position switch guide rod is connected with an electrical position switch, the other end of the position switch guide rod is used for abutting against the sliding sealing ring, and the position switch guide rod can move relative to the casing; the elastic piece is sleeved on the position switch guide rod and located in the shell, one end, close to the electric position switch, of the elastic piece is connected to the shell, and the other end of the elastic piece is connected to the position switch guide rod. In the position detection device for the sliding sealing ring of the water inlet ball valve, all detection parts are installed and hidden in the valve body, and various corresponding cavities are required to be formed in the valve body, so that the processing difficulty of the valve body is increased, the processing cost is increased, and the detection parts are completely positioned in the valve body and are not beneficial to installation and maintenance of the detection parts; and because the position distance between the sealing withdrawing state and the putting-in state of the large ball valve is longer, part of the long-strip-shaped detection rod in the detection device is suspended outside the flange of the ball valve, and the detection device is easily influenced by the surrounding environment during detection, is easy to vibrate and reduces the reliability of measured data.
Disclosure of Invention
In order to solve the defects of the prior art, the utility model provides an installation and maintenance are convenient, safe and reliable, processing cost low are used for the sealed position detection device of the large-scale ball valve in power station.
The technical scheme adopted by the utility model for realizing the technical purpose is a position detection device for sealing a large ball valve of a hydropower station, which comprises a detection component arranged on the ball valve and a sensor 13 matched with the detection component, wherein the detection component at least comprises a measuring rod steel sleeve 9, a detection rod 3, a reset spring 16, a spring sheath 12 and a measuring rod stop 17, the measuring rod steel sleeve 9 is arranged in a prefabricated threaded hole on a ball valve flange 8 through an external thread arranged at the middle part of the measuring rod steel sleeve 9, the detection rod 3 is inserted in the measuring rod steel sleeve 9, a triangular base 11 is fixed at the outer side of the ball valve flange 8 through a base bolt 10, the upper part 19 of the detection rod is positioned through a stepped hole matched with the shape of the upper part 19 of the detection rod in the triangular base 11, the lower part 4 of the detection rod is provided with a detection rod measuring head 2, the detection rod measuring head 2 is positioned at a detection orifice 1 of a valve, a measuring rod stop block 17 is arranged between the upper end 18 of the detection rod and the reset spring 16, the measuring rod stop block 17 is in direct contact with the reset spring 16, and when the detection rod is put into a sealing mode, the reset spring 16 is a power source for pushing the detection rod 3 to move.
The further improvement of the technical proposal is that the triangular base 11 consists of a base body and a gland, and the base bolt 10 integrally installs the triangular base 11 at the outer side of the ball valve flange 8.
And, a seal ring 7 is arranged between the measuring rod steel bushing 9 and the valve body 5, and the distance between the seal ring 7 and the detecting rod measuring head 2 is equivalent to the distance of seal input.
The sensor 13 is a proximity photoelectric sensor, and sends a signal by sensing the distance from the end of the detection rod 3.
According to the technical scheme, the utility model provides a position detection device that large-scale ball valve of power station is sealed has add independent part triangle base in the ball valve flange outside, through base bolt fixed mounting outside the ball valve flange, the gauge rod alternates among the gauge rod steel bushing, only partly gauge rod steel bushing is located the valve body among the detection part, consequently, the inside rectangular type hole that only needs to set up and correspond with the gauge rod cylinder liner of valve body, the processing degree of difficulty of the valve body has significantly reduced, the triangle base is independent accessory, the processing is convenient, whole processing cost is reduced. One part of the measuring rod steel sleeve is sleeved in the triangular base, and the long-strip-shaped detecting rod is arranged on the triangular base outside the ball valve flange. The outer probe rod suit of ball valve flange is in the triangle base, and rectangular shape's probe rod does not have any part and is in unsettled state, and is more stable, does not receive the influence of all ring edge borders during the detection, has reduced the vibration phenomenon, and the measured data reliability is more accurate.
Drawings
FIG. 1 is a cross-sectional view of the detection device of the present invention in cooperation with a sealing structure of a water inlet ball valve.
In the figure: 1-probing an orifice; 2-a probe rod probe; 3-a feeler lever; 4-the lower part of the detection rod; 5-a valve body; 6, sealing the pressure ring; 7-sealing ring; 8-a flange; 9-measuring rod steel sleeve; 10-a base bolt; 11-a triangular base; 12-a spring sheath; 13-a sensor; 14-a sensor holder; 15-bracket bolt; 16-a return spring; 17-measuring bar block; 18-upper end of probe rod; 19-upper part of the detection rod; 20-lower end of the probe rod.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The utility model provides a position detection device for large-scale ball valve of power station is sealed including installing the detection subassembly on the ball valve and with detection subassembly complex sensor 13, sensor 13 passes through sensor support 14 to be fixed in the 12 outsides of spring sheath, and sensor support 14 passes through and is connected between support bolt 15 and the spring sheath 12. The sensor 13 is a proximity photoelectric sensor, and sends a signal by sensing the extending distance between the detection rod 3 and the end part of the lower end 20 of the detection rod. The detection assembly at least comprises a measuring rod steel sleeve 9, a detection rod 3, a reset spring 16, a spring sheath 12 and a measuring rod stop dog 17, the measuring rod steel sleeve 9 is fixedly installed through a ball valve sealing prefabricated threaded hole, the detection rod 3 is installed in the measuring rod steel sleeve 9 in an inserting mode, the outer side of the measuring rod steel sleeve 9 is fixed on a ball valve through a triangular base 11, and the outer side of a ball valve flange 8 is fixed with the triangular base 11 through a base bolt 10. And a sealing groove is formed between the measuring rod steel sleeve 9 and the sealing press ring 6 and the valve body 5, and a butadiene acrylonitrile rubber O-shaped sealing ring 7 is installed and used for isolating pressure water in the valve body 5. The detection rod measuring head 2 directly contacts the ball valve sealing detection orifice 1, the detection rod measuring head 2 is arranged on the lower portion 4 of the detection rod, and the detection rod 3 moves during sealing on and off actions. The upper portion 19 of the detection rod is positioned through a stepped hole matched with the upper portion 19 of the detection rod in shape in the triangular base 11, and the looseness of threaded connection of the steel sleeve 9 of the detection rod caused by vibration in the operation process of the ball valve is prevented. The spring sheath 12 is in threaded connection with the measuring rod steel sleeve 9, the return spring 16 is installed in the spring sheath 12, and a measuring rod stop 17 is arranged between the upper end 18 of the detecting rod and the return spring 16. The end of the spring is in direct contact with the rod stop 17 of the detection rod 3.
In a sealing input state, the measuring rod stop block 17 is pressed against the sealing compression ring 6 by the detection rod 3 under the action of spring thrust, the measuring rod distance sensor 13 is longer, generally about 7mm, and the sensor 13 cannot detect signals. In a sealing withdrawing state, the detection rod 3 is pushed outwards by the sealing thrust, the distance between the detection rod and the sensor 13 is shortened to 1mm-2mm, and the sensor 13 detects signals.
Claims (4)
1. The utility model provides a position detection device that large-scale ball valve of power station is sealed, at least including installing the detection subassembly on the ball valve and with detecting subassembly complex sensor (13), its characterized in that: the detection assembly at least comprises a measuring rod steel sleeve (9), a detection rod (3), a reset spring (16), a spring sheath (12) and a measuring rod stop block (17), wherein the measuring rod steel sleeve (9) is installed in a prefabricated threaded hole on a ball valve flange (8) through an external thread arranged in the middle of the measuring rod steel sleeve, the detection rod (3) is inserted in the measuring rod steel sleeve (9), a triangular base (11) is fixed on the outer side of the ball valve flange (8) through a base bolt (10), the upper part (19) of the detection rod is positioned through a stepped hole matched with the upper part (19) of the detection rod in the triangular base (11), the lower part (4) of the detection rod is provided with a detection rod measuring head (2), the detection rod measuring head (2) is positioned at a detection orifice (1) of a valve body (5), a sensor support (14) for installing a sensor (13) is fixed at the end part of the spring sheath (12), the measuring rod stop block (17) is arranged between the upper end (18), the measuring rod stop block (17) is in direct contact with the return spring (16), and when the measuring rod is put into a sealing mode, the return spring (16) is a power source for pushing the detecting rod (3) to move.
2. A position sensing device of a ball valve seal according to claim 1, wherein: the triangular base (11) is composed of a base body and a gland, and the triangular base (11) is integrally installed on the outer side of the ball valve flange (8) through base bolts (10).
3. A position sensing device of a ball valve seal according to claim 1, wherein: and a sealing ring (7) is arranged between the measuring rod steel sleeve (9) and the valve body (5), and the distance between the sealing ring (7) and the measuring head (2) of the measuring rod is equivalent to the sealing input distance.
4. A position sensing device of a ball valve seal according to claim 1, wherein: the sensor (13) is a proximity photoelectric sensor and sends signals by sensing the extending distance between the sensor and the end part of the detection rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022399553.2U CN213579158U (en) | 2020-10-26 | 2020-10-26 | Position detection device for sealing large ball valve of hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022399553.2U CN213579158U (en) | 2020-10-26 | 2020-10-26 | Position detection device for sealing large ball valve of hydropower station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213579158U true CN213579158U (en) | 2021-06-29 |
Family
ID=76528776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022399553.2U Active CN213579158U (en) | 2020-10-26 | 2020-10-26 | Position detection device for sealing large ball valve of hydropower station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213579158U (en) |
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2020
- 2020-10-26 CN CN202022399553.2U patent/CN213579158U/en active Active
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