CN112963571A - Slow-opening and slow-closing ball valve - Google Patents
Slow-opening and slow-closing ball valve Download PDFInfo
- Publication number
- CN112963571A CN112963571A CN202110191296.XA CN202110191296A CN112963571A CN 112963571 A CN112963571 A CN 112963571A CN 202110191296 A CN202110191296 A CN 202110191296A CN 112963571 A CN112963571 A CN 112963571A
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- CN
- China
- Prior art keywords
- valve
- rod
- slow
- sliding sleeve
- ball
- 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.)
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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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
- F16K31/44—Mechanical actuating means
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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
- F16K35/02—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action
- F16K35/022—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by a separate actuating element
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0647—Spindles or actuating means
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a slow-opening slow-closing ball valve, which comprises a valve body with a liquid inlet pipeline, wherein an end cover is fixedly arranged on the valve body, a liquid outlet pipeline is arranged on the end cover, and the slow-opening slow-closing ball valve also comprises: valve rod, valve ball, locking cover, locking mechanism. The valve rod is rotatably arranged on the valve body; the valve ball is fixedly arranged at the lower end of the valve rod; the locking sleeve is fixedly arranged on the valve body; the locking mechanism is arranged on the valve rod, and when the rotating speed of the valve rod exceeds a preset value, the locking mechanism can be matched with the locking sleeve, so that the valve rod is limited to rotate. The invention has the advantages that: through setting up locking mechanism, can be when the valve rod rotational speed is too fast, automatic locking valve rod makes the valve ball stall to can avoid the production of water hammer when closing the ball valve, and can avoid the influence of sudden pressure drop to the pipeline when opening the ball valve, thereby prolong the life of ball valve and pipeline.
Description
Technical Field
The invention relates to the field of pipeline valves, in particular to a water hammer-proof ball valve.
Background
The ball valve is a control device for controlling the on-off of a flow passage, realizes the separation of a pipeline by rotating a ball body, has the advantages of small fluid resistance, simple structure, tightness, reliability, convenient operation, rapid opening and closing, wide application range and the like, and is widely applied to the fields of petroleum, petrifaction, chemical industry, metallurgy, electric power, water conservancy, water heating, urban construction, fire fighting, machinery, coal, food, ships, power stations, ocean engineering and the like. In the process of opening or closing the ball valve in the prior art, if the opening speed is too high, a water hammer is easily formed, a valve seat is easily loosened or damaged under the long-term impact of the water hammer, the sealing performance and the service life of the valve are finally influenced, and the ball valve is designed to solve the problems.
Disclosure of Invention
In view of the above, it is desirable to provide a slow-opening and slow-closing ball valve.
The invention discloses a slow-opening slow-closing ball valve, which comprises a valve body with a liquid inlet pipeline, wherein an end cover is fixedly arranged on the valve body, a liquid outlet pipeline is arranged on the end cover, and the slow-opening slow-closing ball valve also comprises: valve rod, valve ball, locking cover, locking mechanism. The valve rod is rotatably arranged on the valve body; the valve ball is fixedly arranged at the lower end of the valve rod, a connecting channel is formed in the valve ball, and the connecting channel can communicate the liquid inlet pipeline and the liquid outlet pipeline; the locking sleeve is fixedly arranged on the valve body; the locking mechanism is arranged on the valve rod, and when the rotating speed of the valve rod exceeds a preset value, the locking mechanism can be matched with the locking sleeve, so that the valve rod is limited to rotate.
In one embodiment, the locking mechanism includes a pendulum assembly, a sliding sleeve, and a first elastic member, the sliding sleeve is disposed on the valve rod and can slide along the valve rod, the pendulum assembly is connected to the sliding sleeve, a lower end of the first elastic member abuts against the valve rod, an upper end of the first elastic member abuts against the sliding sleeve, when the valve rod rotates, the pendulum assembly can drive the sliding sleeve to move downward under the action of centrifugal force, and when a rotation speed of the valve rod exceeds a preset value, the sliding sleeve can be clamped with the locking sleeve, so as to limit the valve rod to rotate.
In one embodiment, the pendulum assembly comprises a first connecting rod, a second connecting rod, a first swing rod, a second swing rod, a first swing ball and a second swing ball, wherein one end of the first connecting rod is hinged to the sliding sleeve, the other end of the first connecting rod is hinged to one end of the first swing rod, the other end of the first swing rod is fixedly connected with the first swing ball, and the middle part of the first swing rod is hinged to the valve rod; one end of the second connecting rod is hinged to the sliding sleeve, the other end of the second connecting rod is hinged to one end of the second swing rod, the other end of the second swing rod is fixedly connected with the second swing ball, and the middle of the second swing rod is hinged to the valve rod.
In one embodiment, the locking sleeve is provided with a containing groove, a first clamping tooth is arranged on the bottom surface of the containing groove, a second clamping tooth is arranged on the sliding sleeve, and when the sliding sleeve moves downwards to abut against the locking sleeve, the first clamping tooth can be clamped with the second clamping tooth, so that the sliding sleeve is fixed.
In one embodiment, the sliding sleeve is provided with a clamping boss, and the second clamping teeth are arranged on the lower end face of the clamping boss.
In one of them embodiment, the sliding sleeve has seted up the annular, slowly open slowly closing ball valve still includes latch mechanism, latch mechanism includes locking lever, second elastic component, the locking lever slide set up in on the valve body, second elastic component butt in the locking lever, thereby make the locking lever butt in the sliding sleeve, work as the sliding sleeve move down to with during the locking cover joint, the locking lever stretches into in the annular, thereby the restriction the locking cover is followed the valve rod slides.
In one embodiment, one end of the lock rod extends out of the valve body.
In one embodiment, a top cover is fixedly arranged at the top of the valve body, and the top cover is arranged on the locking sleeve in a covering manner, so that the upper end of the accommodating groove is closed.
The invention has the advantages that:
1. by arranging the locking mechanism, the valve rod can be automatically locked when the rotating speed of the valve rod is too high, so that the valve ball stops rotating, the generation of water hammer can be avoided when the ball valve is closed, the influence of sudden pressure drop on a pipeline can be avoided when the ball valve is opened, and the service lives of the ball valve and the pipeline are prolonged;
2. the pendulum assembly is arranged, and the position of the sliding sleeve is controlled by utilizing the centrifugal force exerted on the pendulum ball when the valve rod rotates, so that the structure is ingenious;
3. through setting up latch mechanism, can make the ball valve keep the locking state, when needs unblock, manual pull out the annular with the locking lever and can unblock, convenient and fast.
Drawings
FIG. 1 is a sectional view of a slowly opening and slowly closing ball valve provided by the present invention;
FIG. 2 is a cross-sectional view of a slowly opening and slowly closing ball valve provided by the present invention in a locked state;
FIG. 3 is a perspective view of a glide sleeve provided in accordance with the present invention;
fig. 4 is a perspective view of a locking sleeve provided by the present invention.
In the figure, a valve body 1, a liquid inlet pipeline 11, an end cover 2, a liquid outlet pipeline 21, a top cover 3, a valve rod 4, an abutting boss 41, a valve ball 5, a connecting channel 51, a locking sleeve 6, a containing groove 61, a first clamping tooth 62, a first connecting rod 71, a second connecting rod 72, a first swing rod 73, a second swing rod 74, a first swing ball 75, a second swing ball 76, a sliding sleeve 77, a clamping boss 771, a second clamping tooth 772, a ring groove 773, a first elastic member 78, a lock rod 81 and a second elastic member 82.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 4, the invention discloses a slow-opening and slow-closing ball valve, which comprises a valve body 1 with a liquid inlet pipeline 11, wherein an end cover 2 is fixedly arranged on the valve body 1, the end cover 2 is provided with a liquid outlet pipeline 21, and the slow-opening and slow-closing ball valve further comprises: valve rod 4, valve ball 5, locking cover 6, locking mechanism. The valve rod 4 is rotatably arranged on the valve body 1; the valve ball 5 is fixedly arranged at the lower end of the valve rod 4, a connecting channel 51 is formed in the valve ball 5, and the connecting channel 51 can communicate the liquid inlet pipeline 11 with the liquid outlet pipeline 21; the locking sleeve 6 is fixedly arranged on the valve body 1; the locking mechanism is arranged on the valve rod 4, and when the rotating speed of the valve rod 4 exceeds a preset value, the locking mechanism can be matched with the locking sleeve 6, so that the valve rod 4 is limited to rotate.
In the present embodiment, the preset value of the valve rod 4 is 0.3 rpm.
Preferably, the locking mechanism includes a pendulum assembly, a sliding sleeve 77, and a first elastic member 78, the sliding sleeve 77 is sleeved on the valve rod 4 and can slide along the valve rod 4, the pendulum assembly is connected to the sliding sleeve 77, a lower end of the first elastic member 78 abuts against the valve rod 4, an upper end of the first elastic member abuts against the sliding sleeve 77, when the valve rod 4 rotates, the pendulum assembly can drive the sliding sleeve 77 to move downward under the action of centrifugal force, and when the rotation speed of the valve rod 4 exceeds a preset value, the sliding sleeve 77 can be clamped with the locking sleeve 6, so as to limit the rotation of the valve rod 4.
It is understood that the valve rod 4 is provided with an abutment boss 41, and the lower end of the first elastic member 78 abuts against the abutment boss 41.
Preferably, the pendulum assembly comprises a first link 71, a second link 72, a first swing link 73, a second swing link 74, a first swing ball 75 and a second swing ball 76, one end of the first link 71 is hinged to the sliding sleeve 77, the other end of the first link is hinged to one end of the first swing link 73, the other end of the first swing link 73 is fixedly connected to the first swing ball 75, and the middle part of the first swing link 73 is hinged to the valve rod 4; one end of the second link 72 is hinged to the sliding sleeve 77, the other end of the second link is hinged to one end of the second swing link 74, the other end of the second swing link 74 is fixedly connected to the second swing ball 76, and the middle of the second swing link 74 is hinged to the valve rod 4.
It should be mentioned that the first link 71, the first swing link 73, and the first swing ball 75 form a first pendulum mechanism, the second link 72, the second swing link 74, and the second swing ball 76 form a second pendulum mechanism, and the first pendulum mechanism and the second pendulum mechanism are arranged in a central symmetry manner, so that the valve rod can keep balance when rotating.
Preferably, as shown in fig. 4, a containing groove 61 is formed in the locking sleeve 6, a first engaging tooth 62 is disposed on a bottom surface of the containing groove 61, as shown in fig. 3, a second engaging tooth 772 is disposed on the sliding sleeve 77, and when the sliding sleeve 77 moves downward to abut against the locking sleeve 6, the first engaging tooth 62 can engage with the second engaging tooth 772, so as to fix the sliding sleeve 77.
Preferably, the sliding sleeve 77 has a clamping boss 771, and the second clamping tooth 772 is disposed on a lower end surface of the clamping boss 771.
Preferably, slip set 77 and last annular 773 of having seted up, slowly open slowly to close ball valve still includes latch mechanism, latch mechanism includes locking lever 81, second elastic component 82, locking lever 81 slide set up in on the valve body 1, second elastic component 82 butt in locking lever 81, thereby make locking lever 81 butt in slip set 77, work as slip set 77 move down to with during 6 joints of locking cover, locking lever 81 stretches into in the annular 773, thereby the restriction locking cover 6 is followed valve rod 4 slides.
Preferably, one end of the lock bar 81 protrudes out of the valve body 1.
Preferably, the top cover 3 is fixedly arranged at the top of the valve body 1, and the top cover 3 is covered on the locking sleeve 6, so that the upper end of the accommodating groove 61 is closed.
The working mode of the invention is as follows: as shown in fig. 1, at this time, the locking sleeve 6 is separated from the sliding sleeve 77, when the valve rod 4 rotates, the first pendulum ball 75 and the second pendulum ball 76 are acted by centrifugal force and move in a direction away from the valve rod 4, so as to drive the first pendulum rod 73 and the second pendulum rod 74 to rotate, the first pendulum rod 73 and the second pendulum rod 74 drive the sliding sleeve 77 to move downwards by pulling the first connecting rod 71 and the second connecting rod 72, and compress the first elastic member 78, when the rotating speed of the valve rod 4 exceeds a preset value, as shown in fig. 2, the first clamping tooth 62 is clamped with the second clamping tooth 772, so as to limit the valve rod 4 to rotate, and at this time, one end of the lock rod extends into the annular groove 773, so as to limit the sliding sleeve 77 to move along the valve rod 4.
When the unlocking is needed, the locking rod 81 is pulled, the locking rod 81 is separated from the annular groove 773, the sliding sleeve 77 moves upwards under the action of the first elastic piece 78, the first clamping tooth 62 is separated from the second clamping tooth 772, and therefore the valve rod 4 can rotate freely.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The utility model provides a slowly open ball valve slowly, is including the valve body that has the feed liquor pipeline, the fixed end cover that is provided with on the valve body, liquid pipeline has been seted up to the end cover, its characterized in that, slowly open ball valve slowly still includes:
the valve rod is rotatably arranged on the valve body;
the valve ball is fixedly arranged at the lower end of the valve rod, a connecting channel is formed in the valve ball, and the connecting channel can be used for communicating the liquid inlet pipeline with the liquid outlet pipeline;
the locking sleeve is fixedly arranged on the valve body;
and the locking mechanism is arranged on the valve rod, and can be matched with the locking sleeve when the rotating speed of the valve rod exceeds a preset value, so that the valve rod is limited to rotate.
2. The slow-opening slow-closing ball valve according to claim 1, wherein the locking mechanism comprises a pendulum assembly, a sliding sleeve and a first elastic member, the sliding sleeve is sleeved on the valve rod and can slide along the valve rod, the pendulum assembly is connected to the sliding sleeve, the lower end of the first elastic member abuts against the valve rod, the upper end of the first elastic member abuts against the sliding sleeve, when the valve rod rotates, the pendulum assembly can drive the sliding sleeve to move downwards under the action of centrifugal force, and when the rotation speed of the valve rod exceeds a preset value, the sliding sleeve can be clamped with the locking sleeve to limit the rotation of the valve rod.
3. The slow-opening slow-closing ball valve according to claim 2, wherein the pendulum assembly comprises a first connecting rod, a second connecting rod, a first swing rod, a second swing rod, a first swing ball and a second swing ball, one end of the first connecting rod is hinged to the sliding sleeve, the other end of the first connecting rod is hinged to one end of the first swing rod, the other end of the first swing rod is fixedly connected with the first swing ball, and the middle part of the first swing rod is hinged to the valve rod; one end of the second connecting rod is hinged to the sliding sleeve, the other end of the second connecting rod is hinged to one end of the second swing rod, the other end of the second swing rod is fixedly connected with the second swing ball, and the middle of the second swing rod is hinged to the valve rod.
4. The slow-opening slow-closing ball valve according to claim 3, wherein the locking sleeve is provided with a containing groove, the bottom surface of the containing groove is provided with a first clamping tooth, the sliding sleeve is provided with a second clamping tooth, and when the sliding sleeve moves downwards to be connected with the locking sleeve in a butt joint mode, the first clamping tooth can be clamped with the second clamping tooth, so that the sliding sleeve is fixed.
5. The slow-opening slow-closing ball valve according to claim 4, wherein the sliding sleeve is provided with a clamping boss, and the second clamping teeth are arranged on the lower end face of the clamping boss.
6. The slow-opening slow-closing ball valve according to claim 4, wherein the sliding sleeve is provided with a ring groove, the slow-opening slow-closing ball valve further comprises a clamping mechanism, the clamping mechanism comprises a lock rod and a second elastic member, the lock rod is slidably arranged on the valve body, and the second elastic member abuts against the lock rod, so that the lock rod abuts against the sliding sleeve, when the sliding sleeve moves downwards to be connected with the locking sleeve in a clamping manner, the lock rod extends into the ring groove, and the locking sleeve is limited to slide along the valve rod.
7. The slow-opening slow-closing ball valve as claimed in claim 6, wherein one end of the locking rod extends out of the valve body.
8. The slow-opening slow-closing ball valve as claimed in claim 4, wherein a top cover is fixedly arranged at the top of the valve body, and the top cover is arranged on the locking sleeve, so that the upper end of the accommodating groove is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110191296.XA CN112963571A (en) | 2021-02-20 | 2021-02-20 | Slow-opening and slow-closing ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110191296.XA CN112963571A (en) | 2021-02-20 | 2021-02-20 | Slow-opening and slow-closing ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112963571A true CN112963571A (en) | 2021-06-15 |
Family
ID=76285193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110191296.XA Withdrawn CN112963571A (en) | 2021-02-20 | 2021-02-20 | Slow-opening and slow-closing ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112963571A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215930A (en) * | 2021-12-20 | 2022-03-22 | 海南核电有限公司 | Pipeline valve |
| CN114738542A (en) * | 2022-03-15 | 2022-07-12 | 江苏照友石化机械有限公司 | Manual orifice throttle valve convenient to adjust |
-
2021
- 2021-02-20 CN CN202110191296.XA patent/CN112963571A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215930A (en) * | 2021-12-20 | 2022-03-22 | 海南核电有限公司 | Pipeline valve |
| CN114215930B (en) * | 2021-12-20 | 2024-06-11 | 海南核电有限公司 | Pipeline valve |
| CN114738542A (en) * | 2022-03-15 | 2022-07-12 | 江苏照友石化机械有限公司 | Manual orifice throttle valve convenient to adjust |
| CN114738542B (en) * | 2022-03-15 | 2024-04-12 | 江苏照友石化机械有限公司 | Manual orifice plate choke valve convenient to adjust |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210615 |