CN114719042B - Limiting device installed at valve rod of electric valve and used for preventing valve from misoperation - Google Patents
Limiting device installed at valve rod of electric valve and used for preventing valve from misoperation Download PDFInfo
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- CN114719042B CN114719042B CN202210279016.5A CN202210279016A CN114719042B CN 114719042 B CN114719042 B CN 114719042B CN 202210279016 A CN202210279016 A CN 202210279016A CN 114719042 B CN114719042 B CN 114719042B
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- valve
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- block
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- 230000007257 malfunction Effects 0.000 claims description 20
- 210000000078 claw Anatomy 0.000 claims description 19
- 238000010586 diagram Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
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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
- F16K35/00—Means to prevent accidental or unauthorised actuation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
Abstract
The application discloses a limiting device for preventing valve misoperation, which is arranged at a valve rod of an electric valve and comprises a valve body and a limiting unit, wherein the valve body comprises a valve rod, a first driving piece, a disconnecting link, an upper limiting rod and a lower limiting rod, the limiting unit comprises a cylindrical barrel in threaded fit with the valve rod, a movable clamping block in running fit with the cylindrical barrel, a first sliding block and a second sliding block which are arranged on the movable clamping block and are in sliding fit with the movable clamping block, a first clamping piece arranged on the upper limiting rod and the lower limiting rod, and a second clamping piece fixed on the movable clamping block. The device disclosed by the application is fixed under the action of the limiting unit after the disconnecting link is opened or closed, at the moment, even if the valve rod continues to rotate, the disconnecting link cannot continue to move, the condition that the motor burns out can be effectively avoided, and the valve rod can be limited under the action of the first clamping piece and the second clamping piece, so that the valve misoperation can be effectively avoided.
Description
Technical Field
The application relates to the technical field of electric valves, in particular to a limiting device which is arranged at a valve rod of an electric valve and used for preventing misoperation of the valve.
Background
The electric valve has larger action moment than the common valve, the switch action speed of the electric valve can be adjusted, the structure is simple, the maintenance is easy, and the electric valve can be used for controlling the flow of various types of fluid such as air, water, steam, various corrosive media, slurry, oil, liquid metal, radioactive media and the like. The traditional pneumatic valve is not easy to damage due to clamping because of the buffer characteristic of the gas in the action process, but a gas source is needed, and a control system of the pneumatic valve is more complex than that of an electric valve.
In the electric valve, the knife gate valve is widely used, but the knife gate valve in the prior art often has the situation of misoperation, namely, the gate is suddenly opened or closed under the condition of no control, so that various serious consequences are caused.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present application has been made in view of the above and/or problems associated with conventional stop devices mounted on the valve stem of an electrically operated valve to prevent valve malfunction.
Therefore, the problem to be solved by the application is how to provide a limiting device which is arranged at the valve rod of the electric valve and used for preventing the valve from misoperation.
In order to solve the technical problems, the application provides the following technical scheme: the limiting device comprises a valve body, a first driving piece, a disconnecting link, an upper limiting rod and a lower limiting rod, wherein the valve body comprises a valve rod, a first driving piece, a disconnecting link, the upper limiting rod and the lower limiting rod, the valve rod is a threaded rod, and the first driving piece drives the valve rod to rotate; the limiting unit is arranged between the upper limiting rod and the lower limiting rod and comprises a cylindrical barrel in threaded fit with the valve rod, a movable clamping block in running fit with the cylindrical barrel, a first sliding block and a second sliding block which are arranged on the movable clamping block and are in sliding fit with the movable clamping block, a first clamping piece arranged on the upper limiting rod and the lower limiting rod, and a second clamping piece fixed on the movable clamping block, wherein the first sliding block and the second sliding block are vertically arranged, a track groove is formed in the first sliding block, a protrusion matched with the track groove is formed in the second sliding block, and a limiting groove matched with the second sliding block is formed in the cylindrical barrel; the first clamping piece comprises a first cylinder, a wedge block is arranged in the first cylinder, the second clamping piece comprises a second clamping head, a sliding sleeve fixedly connected with the bottom end of the second clamping head, a sliding claw sleeve matched with the sliding sleeve, a clamping cylinder connected with the second clamping head and matched with the sliding claw sleeve, and a second spring sleeved on the clamping cylinder, the sliding claw sleeve is in sliding fit with the clamping cylinder, and the second spring is arranged between the sliding claw sleeve and the second clamping head.
As a preferable scheme of the limiting device for preventing valve misoperation, which is arranged at the valve rod of the electric valve, the application comprises the following steps: the track groove comprises a first linear groove, a second linear groove and an arc groove, the arc groove is connected with the first linear groove and the second linear groove, two ends of the first sliding block extend out of the movable clamping block, and when the protrusion is arranged in the arc groove, the end part of the second sliding block is arranged in the limiting groove.
As a preferable scheme of the limiting device for preventing valve misoperation, which is arranged at the valve rod of the electric valve, the application comprises the following steps: the plurality of wedge blocks are arranged on the inner wall of the first cylinder at equal angles, and the sliding sleeve and the sliding claw sleeve are respectively provided with a moving groove in sliding fit with the wedge blocks.
As a preferable scheme of the limiting device for preventing valve misoperation, which is arranged at the valve rod of the electric valve, the application comprises the following steps: the sliding sleeve is provided with triangular grooves at equal angles, and the sliding claw sleeve is provided with saw teeth matched with the triangular grooves.
As a preferable scheme of the limiting device for preventing valve misoperation, which is arranged at the valve rod of the electric valve, the application comprises the following steps: the limiting unit further comprises a first elastic piece and a second elastic piece which are sleeved on the valve rod, the first elastic piece is fixed on the upper limiting rod, and the second elastic piece is arranged on the lower limiting rod.
As a preferable scheme of the limiting device for preventing valve misoperation, which is arranged at the valve rod of the electric valve, the application comprises the following steps: the upper limiting rod is provided with a first boss corresponding to the first sliding block, and the lower limiting rod is provided with a second boss corresponding to the first sliding block.
As a preferable scheme of the limiting device for preventing valve misoperation, which is arranged at the valve rod of the electric valve, the application comprises the following steps: the movable clamping block is provided with a first groove matched with the first sliding block and a second groove matched with the second sliding block.
As a preferable scheme of the limiting device for preventing valve misoperation, which is arranged at the valve rod of the electric valve, the application comprises the following steps: the limiting unit further comprises a first spring arranged in the second groove and an end cover matched with the second groove, and the first spring is arranged between the end cover and the second slider.
As a preferable scheme of the limiting device for preventing valve misoperation, which is arranged at the valve rod of the electric valve, the application comprises the following steps: the cylinder is provided with the end flange in both ends, remove the fixture block setting in two between the end flange.
As a preferable scheme of the limiting device for preventing valve misoperation, which is arranged at the valve rod of the electric valve, the application comprises the following steps: the movable clamping block is fixedly connected with the disconnecting link through a connecting rod.
The application has the beneficial effects that: after the disconnecting link is opened or closed, the disconnecting link can be fixed under the action of the limiting unit, at the moment, even if the valve rod continues to rotate, the disconnecting link cannot continue to move, the condition that the motor burns out can be effectively avoided, and the valve rod can be limited under the action of the first clamping piece and the second clamping piece, so that the occurrence of valve misoperation is effectively avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a structural view of a limiting device mounted on a valve rod of an electric valve to prevent valve misoperation.
Fig. 2 is a cross-sectional view of a stop unit of a stop device mounted on a valve stem of an electrically operated valve to prevent malfunction of the valve.
Fig. 3 is a cross-sectional view of another view of the stop unit of the stop device mounted at the valve stem of the electrically operated valve to prevent valve malfunction.
Fig. 4 is a block diagram of the moving block of the limiting device installed at the valve rod of the electric valve to prevent the valve from malfunction.
Fig. 5 is a block diagram of a limiting unit of a limiting device installed at a valve rod of an electric valve to prevent malfunction of the valve.
Fig. 6 is a second engaging member structure of the limiting device mounted on the valve rod of the electric valve to prevent the valve from malfunction.
Fig. 7 is a first engaging member structure of a limiting device mounted on a valve stem of an electrically operated valve to prevent malfunction of the valve.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 7, in a first embodiment of the present application, a limiting device for preventing valve malfunction is provided, which is installed at a valve rod of an electric valve, and the limiting device for preventing valve malfunction is installed at the valve rod of the electric valve, and includes a valve body 100 and a limiting unit 200, wherein the limiting unit 200 is disposed in the valve body 100, and is capable of preventing a motor from rotating after a knife switch 103 reaches a limit position, so that a motor burnout phenomenon occurs, and limiting the knife switch 103, thereby preventing occurrence of valve malfunction.
Specifically, the valve body 100 includes a valve rod 101, a first driving member 102, a knife switch 103, an upper limit rod 104 and a lower limit rod 105, where the valve rod 101 is a threaded rod, and the first driving member 102 drives the valve rod 101 to rotate. The valve body 100 in the present application is a knife gate valve, and the first driving member 102 is a motor.
The limiting unit 200 is arranged between the upper limiting rod 104 and the lower limiting rod 105, and comprises a cylindrical barrel 201 in threaded fit with the valve rod 101, a movable clamping block 202 in rotary fit with the cylindrical barrel 201, a first sliding block 203 and a second sliding block 204 which are arranged on the movable clamping block 202 and are in sliding fit with the movable clamping block, a first clamping piece 205 arranged on the upper limiting rod 104 and the lower limiting rod 105, and a second clamping piece 206 fixed on the movable clamping block 202, wherein the first sliding block 203 and the second sliding block 204 are vertically arranged, a track groove 203a is formed in the first sliding block 203, a protrusion 204a matched with the track groove 203a is formed in the second sliding block 204, and a limiting groove 201a matched with the second sliding block 204 is formed in the cylindrical barrel 201.
The first clamping piece 205 comprises a first cylinder 205a, a wedge-shaped block 205b is arranged in the first cylinder 205a, the second clamping piece 206 comprises a second clamping head 206a, a sliding sleeve 206b fixedly connected with the bottom end of the second clamping head 206a, a sliding claw sleeve 206c matched with the sliding sleeve 206b, a clamping cylinder 206d connected with the second clamping head 206a and matched with the sliding claw sleeve 206c, and a second spring 206e sleeved on the clamping cylinder 206d, the sliding claw sleeve 206c is in sliding fit with the clamping cylinder 206d, and the second spring 206e is arranged between the sliding claw sleeve 206c and the second clamping head 206 a.
The track groove 203a comprises a first linear groove 203a-1, a second linear groove 203a-2 and an arc groove 203a-3, the arc groove 203a-3 is connected with the first linear groove 203a-1 and the second linear groove 203a-2, two ends of the first sliding block 203 extend out of the movable clamping block 202, and when the protrusion 204a is arranged in the arc groove 203a-3, the end part of the second sliding block 204 is arranged in the limiting groove 201a.
Further, a plurality of wedge blocks 205b are equiangularly disposed on the inner wall of the first cylinder 205a, moving grooves 206b-1 slidably engaged with the wedge blocks 205b are disposed on the sliding sleeve 206b and the sliding claw sleeve 206c, triangular grooves 206b-2 are equiangularly disposed on the sliding sleeve 206b, and saw teeth 206c-1 engaged with the triangular grooves 206b-2 are disposed on the sliding claw sleeve 206 c. When the slider sleeve 206c is pressed against the slider sleeve 206b, the slider sleeve 206c is rotated by the engagement of the triangular grooves 206b-2 and the saw teeth 206c-1.
The sliding sleeve 206b, the sliding claw sleeve 206c, the engaging cylinder 206d, and the second spring 206e are symmetrically disposed on the upper and lower sides of the second engaging head 206 a.
Preferably, the limiting unit 200 further includes a first elastic member 207 and a second elastic member 208 sleeved on the valve rod 101, where the first elastic member 207 is fixed on the upper limiting rod 104, and the second elastic member 208 is disposed on the lower limiting rod 105, and preferably, the first elastic member 207 and the second elastic member 208 adopt rubber rings, and an iron ring is disposed on the rubber rings, and is used for being attached to the cylindrical barrel 201, so that the cylindrical barrel 201 can rotate relative to the rubber rings. The upper limit rod 104 is provided with a first boss 104a corresponding to the first slider 203, and the lower limit rod 105 is provided with a second boss 105a corresponding to the first slider 203.
In this embodiment, the moving clamping block 202 is provided with a first groove 202a that mates with the first slider 203 and a second groove 202b that mates with the second slider 204, the limiting unit 200 further includes a first spring 209 disposed in the second groove 202b, and an end cover 210 that mates with the second groove 202b, and the first spring 209 is disposed between the end cover 210 and the second slider 204.
The two ends of the cylindrical barrel 201 are provided with end flanges 201b, the movable clamping block 202 is arranged between the two end flanges 201b, and the movable clamping block 202 is fixedly connected with the knife switch 103 through a connecting rod 211.
It should be noted that, a certain friction force is provided between the cylinder 201 and the moving block 202, in order to facilitate description, the valve rod 101 rotates clockwise, the moving block 202 moves downward, the valve rod 101 rotates anticlockwise, the moving block 202 moves upward, when the knife switch 103 is at the bottommost end, the end of the second slider 204 is separated from the limit groove 201a, the valve rod 101 continues to rotate, the moving block 202 also does not move downward, at this time, the second clamping piece 206 is matched with the first clamping piece 205, the wedge block 205b is located in the moving groove 206b-1 on the sliding sleeve 206b, the sliding block 206c rotates relatively with the sliding sleeve 206b, when the valve rod 101 stops rotating, the moving block 202 moves upward by a small distance under the action of the second elastic piece 208, so that the wedge block 205b is clamped on the saw tooth 206c-1 of the sliding block 206c, and the knife switch 103 is limited, at this time, the end of the second slider 204 still breaks away from the limit groove 201a, the tension force between the second clamping piece 206 and the first clamping piece 205 is greater than the tension force between the cylinder 201 and the first clamping piece 205, the sliding block 202 is stopped by the second clamping piece 202, and the action of the second clamping piece 202 is stopped by the action of the second elastic piece 208, and the movement is stopped by the second elastic piece 202, and the movement is stopped by the action of the second elastic piece 202, and the movement is stopped by the second elastic piece, and the movement of the sliding block 202 moves upwards under the action of the sliding block 202, and the sliding block 202 is left, and the sliding down, and the second clamping piece is stopped by the sliding block 202 is moved down, and is opened.
It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.
Claims (10)
1. Install stop device that prevents valve malfunction in electric valve rod department, its characterized in that: comprising the steps of (a) a step of,
the valve body (100) comprises a valve rod (101), a first driving piece (102), a disconnecting link (103), an upper limiting rod (104) and a lower limiting rod (105), wherein the valve rod (101) is a threaded rod, and the first driving piece (102) drives the valve rod (101) to rotate;
the limiting unit (200) is arranged between the upper limiting rod (104) and the lower limiting rod (105), and comprises a cylindrical barrel (201) in threaded fit with the valve rod (101), a movable clamping block (202) in rotary fit with the cylindrical barrel (201), a first sliding block (203) and a second sliding block (204) which are arranged on the movable clamping block (202) and are in sliding fit with the movable clamping block, a first clamping piece (205) arranged on the upper limiting rod (104) and the lower limiting rod (105), and a second clamping piece (206) fixed on the movable clamping block (202), wherein the first sliding block (203) and the second sliding block (204) are vertically arranged, a track groove (203 a) is arranged on the first sliding block (203), a protrusion (204 a) matched with the track groove (203 a) is arranged on the second sliding block (204), and a limiting groove (201 a) matched with the second sliding block (204) is arranged on the cylindrical barrel (201);
the first clamping piece (205) comprises a first cylinder (205 a), a wedge-shaped block (205 b) is arranged in the first cylinder (205 a), the second clamping piece (206) comprises a second clamping head (206 a), a sliding sleeve (206 b) fixedly connected with the bottom end of the second clamping head (206 a), a sliding claw sleeve (206 c) matched with the sliding sleeve (206 b), a clamping cylinder (206 d) connected with the second clamping head (206 a) and matched with the sliding claw sleeve (206 c), and a second spring (206 e) sleeved on the clamping cylinder (206 d), the sliding claw sleeve (206 c) is in sliding fit with the clamping cylinder (206 d), and the second spring (206 e) is arranged between the sliding claw sleeve (206 c) and the second clamping head (206 a).
2. The stop device installed at a valve stem of an electrically operated valve to prevent valve malfunction as set forth in claim 1, wherein: the track groove (203 a) comprises a first linear groove (203 a-1), a second linear groove (203 a-2) and an arc groove (203 a-3), the arc groove (203 a-3) is connected with the first linear groove (203 a-1) and the second linear groove (203 a-2), two ends of the first sliding block (203) extend out of the movable clamping block (202), and when the protrusion (204 a) is arranged in the arc groove (203 a-3), the end part of the second sliding block (204) is arranged in the limiting groove (201 a).
3. The stop device installed at a valve stem of an electrically operated valve to prevent valve malfunction as claimed in claim 2, wherein: the plurality of wedge blocks (205 b) are arranged on the inner wall of the first cylinder (205 a) at equal angles, and the sliding sleeve (206 b) and the sliding claw sleeve (206 c) are respectively provided with a moving groove (206 b-1) which is in sliding fit with the wedge blocks (205 b).
4. A stop device mounted to a valve stem of an electrically operated valve for preventing valve malfunction as defined in claim 3, wherein: triangular grooves (206 b-2) are equiangularly formed in the sliding sleeve (206 b), and sawteeth (206 c-1) matched with the triangular grooves (206 b-2) are formed in the sliding claw sleeve (206 c).
5. The stop device of any one of claims 1, 2 or 4 mounted on a valve stem of an electrically operated valve to prevent valve malfunction, wherein: the limiting unit (200) further comprises a first elastic piece (207) and a second elastic piece (208) which are sleeved on the valve rod (101), the first elastic piece (207) is fixed on the upper limiting rod (104), and the second elastic piece (208) is arranged on the lower limiting rod (105).
6. The stop device of claim 5, wherein the stop device is mounted on the valve stem of the electrically operated valve to prevent valve malfunction, and wherein: the upper limiting rod (104) is provided with a first boss (104 a) corresponding to the first sliding block (203), and the lower limiting rod (105) is provided with a second boss (105 a) corresponding to the first sliding block (203).
7. The stop device of claim 6, wherein the stop device is mounted on the valve stem of the electrically operated valve to prevent valve malfunction, and wherein: the movable clamping block (202) is provided with a first groove (202 a) matched with the first sliding block (203) and a second groove (202 b) matched with the second sliding block (204).
8. The stop device of claim 7 mounted on a valve stem of an electrically operated valve to prevent valve malfunction, wherein: the limiting unit (200) further comprises a first spring (209) arranged in the second groove (202 b) and an end cover (210) matched with the second groove (202 b), and the first spring (209) is arranged between the end cover (210) and the second slider (204).
9. The stop device installed at a valve stem of an electrically operated valve to prevent valve malfunction as set forth in claim 8, wherein: end flanges (201 b) are arranged at two ends of the cylindrical barrel (201), and the movable clamping block (202) is arranged between the two end flanges (201 b).
10. A stop device for preventing valve malfunction mounted on a valve stem of an electrically operated valve as set forth in any one of claims 1, 2, 4, 6, 7 or 9, wherein: the movable clamping block (202) is fixedly connected with the disconnecting link (103) through a connecting rod (211).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210279016.5A CN114719042B (en) | 2022-03-20 | 2022-03-20 | Limiting device installed at valve rod of electric valve and used for preventing valve from misoperation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210279016.5A CN114719042B (en) | 2022-03-20 | 2022-03-20 | Limiting device installed at valve rod of electric valve and used for preventing valve from misoperation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114719042A CN114719042A (en) | 2022-07-08 |
| CN114719042B true CN114719042B (en) | 2023-10-24 |
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ID=82237805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210279016.5A Active CN114719042B (en) | 2022-03-20 | 2022-03-20 | Limiting device installed at valve rod of electric valve and used for preventing valve from misoperation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114719042B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719041B (en) * | 2022-03-20 | 2023-08-29 | 华能国际电力股份有限公司上海石洞口第二电厂 | Stroke mechanical limiting device installed at valve rod of electric valve |
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| CN114719042A (en) | 2022-07-08 |
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