CN201944401U - Safety device of position limited mechanism for valve actuator - Google Patents
Safety device of position limited mechanism for valve actuator Download PDFInfo
- Publication number
- CN201944401U CN201944401U CN201120042949XU CN201120042949U CN201944401U CN 201944401 U CN201944401 U CN 201944401U CN 201120042949X U CN201120042949X U CN 201120042949XU CN 201120042949 U CN201120042949 U CN 201120042949U CN 201944401 U CN201944401 U CN 201944401U
- Authority
- CN
- China
- Prior art keywords
- position limited
- ejector rod
- screw bolt
- push rod
- valve
- 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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Abstract
The utility model discloses a safety device of a position limited mechanism for a valve actuator, which comprises a position limited screw bolt arranged on a box body of the actuator, wherein a position limited ejector rod is movably arranged at the upper end of the screw bolt and is connected with the position limited screw bolt in to a whole through a safe pin shaft; the lower end of the position limited ejector rod is provided with a blind hole, and the position limited screw bolt extends into the blind hole of the position limited ejector rod; a gap exists between the top of the position limited screw bolt and the bottom of the blind hole of the position limited ejector rod; and a cotter is arranged at the end part of the safe pin shaft extending out of the position limited ejector rod. The safety device has the advantages that the upper end of the position limited screw bolt arranged on the box body of the actuator is movably connected with the position limited ejector rod through the safe pin shaft, when the torsion of the valve is overloaded, the safe pin shaft is cracked first, the position limited ejector rod retracts or breaks away from the position limited screw bolt so as not to damage the box body of the actuator; when the safety device is maintained, only the safe pin shaft is needed to be replaced, and the position limited ejector rod is reinstalled on the position limited screw bolt.
Description
Technical field
The utility model relates to the valve actuator position-limit mechanism, especially relates to a kind of valve actuator position-limit mechanism safety installations.
Background technique
Valve actuator is the valve opening or the drive unit of closing, and is the valve essential important component.The performance quality of valve actuator directly influences even has determined sealability, adjusting function, Safety performance and the working life of valve.
For most of rotary type valve, because self structure will be set position-limit mechanism in the fully open position and the complete shut-down position of valve.The valve position-limit mechanism has following two kinds of forms at present: 1, at valve inner limiting stopper is set; 2, position-limit mechanism is set in valve actuator.The major defect of first kind of form is: controllability is poor, debug difficulties, and maintenance is poor, and at valve inner the trafficability performance that limiting stopper influences valve is set.Second kind of form obtains vast valve manufacturing firm and valve user's approval now, but also there are some problems in this kind limit method.Because the position of open-shut device in opening-closing process of valve is not directly perceived; and operating mode complexity during the actual use of valve; the factor that influences valve opening, closing torque is more; the situation that in the valve using process, occurs the valve torque overload unavoidably; the valve actuator position-limit mechanism takes place to cause situations such as casing cracking because of crossing moment of torsion through regular meeting like this, causes the spacing inefficacy of valve.Because position-limit mechanism is the benchmark of valve seal, position-limit mechanism need be fixed on the final controlling element casing, needs to change the final controlling element casing in case damage, and maintenance cost height, maintenance difficulty are big.
Summary of the invention
The purpose of this utility model is to provide a kind of simple in structure, repair and replacement valve actuator position-limit mechanism safety installations easily.
For achieving the above object, the utility model can be taked following technical proposals:
Valve actuator position-limit mechanism safety installations described in the utility model, comprise the caging bolt that is arranged on the final controlling element casing, the upper end portion of described caging bolt is movably set with spacing push rod, and described spacing push rod and caging bolt are connected as one by the safety bearing pin.
Described spacing push rod lower end offers blind hole, and described caging bolt extends in the blind hole of described spacing push rod; Be provided with the gap between the top of described caging bolt and the blind hole of the spacing push rod bottom.
The described outer safety pin shaft end of spacing push rod that extends is provided with cotter pin.
The caging bolt upper end that advantage of the present utility model is to be arranged on the final controlling element casing is connected with spacing push rod by the activity of safety bearing pin, when the valve torque overload, safe bearing pin at first ruptures, and spacing push rod retraction or disengaging caging bolt can not cause damage to the final controlling element casing.During maintenance, only needs are changed safe bearing pin, spacing push rod are reinstalled on the caging bolt get final product.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is Figure 1A portion enlarged view.
Embodiment
As shown in Figure 1, 2, valve actuator position-limit mechanism safety installations described in the utility model, comprise the caging bolt 2 that is arranged on the final controlling element casing 1, the upper end portion of described caging bolt 2 is movably set with spacing push rod 3, described spacing push rod 3 lower ends offer blind hole 5, and described caging bolt 2 extends in the blind hole 5 of described spacing push rod 3; Be provided with the gap between blind hole 5 bottoms of the top of described caging bolt 2 and spacing push rod 3, described spacing push rod 3 and caging bolt 2 are connected as one by safety bearing pin 4; Safe bearing pin 4 ends outside extending spacing push rod 3 are provided with cotter pin 6.
During actual fabrication, material selection 45 steel of caging bolt 2 and spacing push rod 3, high frequency hardening after the fine finishing, HRC45 ~ HRC50; Annealing in process before material selection 25 steel of safe bearing pin 4, fine finishing is about HRC25.The design strength of safe bearing pin 4 diameters should satisfy, and can bear the fracture of 1.2 times of load of final controlling element nominal moment of torsion step, but less than caging bolt 2 0.8 times with final controlling element casing join strength; Protection caging bolt and final controlling element casing when the 4 unexpected fractures of safety bearing pin.
The utility model is simple in structure, and is easy to maintenance, utilizes the strength of materials difference of this safety installations effectively to protect the vitals in the final controlling element and the component of difficult maintenance.
Claims (3)
1. valve actuator position-limit mechanism safety installations, comprise the caging bolt (2) that is arranged on the final controlling element casing (1), it is characterized in that: the upper end portion of described caging bolt (2) is movably set with spacing push rod (3), and described spacing push rod (3) and caging bolt (2) are connected as one by safe bearing pin (4).
2. valve actuator position-limit mechanism safety installations according to claim 1 is characterized in that: described spacing push rod (3) lower end offers blind hole (5), and described caging bolt (2) extends in the blind hole (5) of described spacing push rod (3); Be provided with the gap between blind hole (5) bottom of the top of described caging bolt (2) and spacing push rod (3).
3. valve actuator position-limit mechanism safety installations according to claim 1 and 2 is characterized in that: described outer safe bearing pin (4) end of spacing push rod (3) of extending is provided with cotter pin (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120042949XU CN201944401U (en) | 2011-02-21 | 2011-02-21 | Safety device of position limited mechanism for valve actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120042949XU CN201944401U (en) | 2011-02-21 | 2011-02-21 | Safety device of position limited mechanism for valve actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201944401U true CN201944401U (en) | 2011-08-24 |
Family
ID=44471745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120042949XU Expired - Fee Related CN201944401U (en) | 2011-02-21 | 2011-02-21 | Safety device of position limited mechanism for valve actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201944401U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864482A (en) * | 2016-06-01 | 2016-08-17 | 颜愚极 | Valve actuating system |
-
2011
- 2011-02-21 CN CN201120042949XU patent/CN201944401U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864482A (en) * | 2016-06-01 | 2016-08-17 | 颜愚极 | Valve actuating system |
| CN105864482B (en) * | 2016-06-01 | 2019-03-08 | 颜愚极 | A kind of valve execution system |
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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 |
Granted publication date: 20110824 Termination date: 20150221 |
|
| EXPY | Termination of patent right or utility model |