CN110131446B - Three-way ball valve - Google Patents
Three-way ball valve Download PDFInfo
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- CN110131446B CN110131446B CN201910421604.6A CN201910421604A CN110131446B CN 110131446 B CN110131446 B CN 110131446B CN 201910421604 A CN201910421604 A CN 201910421604A CN 110131446 B CN110131446 B CN 110131446B
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/087—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug
- F16K11/0873—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with spherical plug the plug being only rotatable around one 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
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a three-way ball valve which comprises a top cover and a valve casing, wherein the upper end of the valve casing is provided with an opening, and the side surface of the valve casing is provided with a first channel, a second channel and a third channel, the centers of the first channel, the second channel and the third channel are positioned in the same horizontal plane; the top cover is arranged at an opening at the upper end of the valve shell through a U-shaped inserted bar; a valve core assembly arranged on the top cover is arranged in the valve shell; the valve core assembly is used for controlling the two-to-two communication or all communication of the first channel, the second channel and the third channel; the three-way ball valve is convenient to assemble, disassemble and maintain.
Description
Technical Field
The invention relates to the technical field of ball valves, in particular to a three-way ball valve.
Background
In industrial or domestic infrastructure, media are usually conveyed by pipelines, in which the pipelines are regulated as a result of pressure or temperature changes, and regulating devices, in particular ball valves, are used in the pipelines for regulating the flow in order to ensure optimum operating conditions and environmental safety. Ball valves are generally valves that use a ball with a circular passage as the opening and closing element, and the ball performs the opening and closing action with the rotation of the valve body. The opening and closing part of the ball valve is a ball body with a through hole and rotates around an axis vertical to the channel, so that the aim of opening and closing the channel is fulfilled. A conventional ball valve is generally a ball having a through hole formed therein and mounted on a valve seat to be opened and closed by rotation of the ball. The ball valve 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 various departments of petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rockets and the like, and daily life of people. However, in order to ensure that the internal leakage does not occur in the existing ball valve, the ball body, namely the closing member, must be tightly pressed on the valve seat during installation, the torque is large during opening and closing, the abrasion of the sealing member is large, so that the service life of the ball valve is short, and once the existing ball valve fails during use or needs to be replaced due to aging, the whole ball valve needs to be detached from a pipeline for repair and replacement, and the repair and replacement of the ball valve are very difficult under actual working conditions.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide an integrated three-way ball valve which is convenient to disassemble and maintain.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a three-way ball valve comprises a top cover and a valve casing, wherein an opening is formed in the upper end of the valve casing, a first channel, a second channel and a third channel are formed in the side face of the valve casing, the centers of the first channel, the second channel and the third channel are located in the same horizontal plane, the second channel and the third channel are coaxial, and the top cover is arranged at the opening in the upper end of the valve casing through a U-shaped inserted rod; a valve core assembly arranged on the top cover is arranged in the valve shell; the valve core assembly is used for controlling the connection and disconnection of the first channel, the second channel and the third channel;
the valve core assembly comprises a valve sleeve, the valve sleeve comprises a first valve sleeve, a second valve sleeve and a third valve sleeve, a first valve cavity is arranged in the first valve sleeve, a second valve cavity is arranged in the second valve sleeve, and a third valve cavity is arranged in the third valve sleeve; the first valve pocket, the second valve pocket and the third valve pocket are spliced to form the valve pockets, and the first valve pocket, the second valve pocket and the third valve pocket are spliced to form the ball valve pocket; a ball body in sealing contact with the ball valve cavity is rotatably connected in the ball valve cavity, a valve rod is arranged on the ball body upwards along the vertical direction, and the valve rod extends out of the valve sleeve and penetrates out of the top cover; the first valve sleeve is provided with a first through hole for communicating the ball valve cavity with the first channel, the second valve sleeve is provided with a second through hole for communicating the ball valve cavity with the second channel, and the third valve sleeve is provided with a third through hole for communicating the ball valve cavity with the third channel; the left side of the first valve sleeve is provided with two first clamping grooves in the vertical direction, and the right side of the first valve sleeve is provided with two second clamping grooves; the second valve sleeve is provided with a first buckle which is clamped with the first clamping groove along the vertical direction at the side edge close to the first valve sleeve, and the second valve sleeve is provided with two third clamping grooves along the vertical direction at the side edge far away from the first valve sleeve; the third valve sleeve is provided with a second buckle which is clamped with the second clamping groove along the vertical direction at the side edge close to the first valve sleeve, and the third valve sleeve is provided with a third buckle which is clamped with the third clamping groove along the vertical direction at the side edge far away from the first valve sleeve;
an annular clamping groove is formed in the circumferential side surface of the top cover; clamping protrusions clamped into the annular clamping grooves are arranged on the first valve sleeve, the second valve sleeve and the third valve sleeve; three positioning grooves are formed in the circumferential side face of the top cover at the annular clamping groove; the first valve sleeve, the second valve sleeve and the third valve sleeve are provided with positioning bulges matched with the positioning grooves; the ball body is internally provided with a first communicating hole which penetrates through the ball body and a second communicating hole which is communicated with the first communicating hole, the axis of the second communicating hole is vertical to the axis of the first communicating hole, and the ball body can be rotated by the valve rod to control the first channel, the second channel and the third channel to be communicated pairwise or be communicated completely.
When the three-way ball valve is used, the rotating valve rod drives the ball body to rotate, and the first communicating hole and the second communicating hole can be controlled to be connected with the first through hole, the second through hole and the third through hole through the first communicating hole and the second communicating hole when the ball body rotates; the on-off of the first channel and the second channel, the on-off of the first channel and the third channel and the on-off of the first channel and the third channel are respectively and correspondingly controlled, and all three channels are communicated; in addition, the top cover is arranged at the opening at the upper end of the valve shell through the U-shaped inserted bar, so that the top cover and the valve shell can be conveniently detached and installed; the valve sleeves are arranged into the first valve sleeve, the second valve sleeve and the third valve sleeve, so that the installation and the disassembly of a ball body in the ball valve cavity can be facilitated, and the maintenance of the three-way ball valve is facilitated.
In a further technical scheme, a first sealing ring in sealing contact with the ball body is arranged at a first through hole in the first valve cavity; a second sealing ring which is in sealing contact with the ball body is arranged at the second through hole in the second valve cavity; and a third sealing ring in sealing contact with the ball body is arranged at the third through hole in the third valve cavity.
Through the technical scheme, when the valve sleeves are clamped and assembled, the first sealing ring, the second sealing ring and the third sealing ring are respectively and correspondingly compressed and deformed through the first valve sleeve, the second valve sleeve and the third valve sleeve, when the first clamping buckle is clamped to the first clamping groove, the second clamping buckle is clamped to the second clamping groove and the third clamping buckle is clamped to the third clamping groove, the first valve sleeve, the second valve sleeve and the third valve sleeve are loosened and move towards the direction far away from the ball body under the action of the first sealing ring, the second sealing ring and the third sealing ring, so that the first clamping buckle is firmly clamped into the first clamping groove, the second clamping buckle is firmly clamped into the second clamping groove and the third clamping buckle is firmly clamped into the third clamping groove. The first valve sleeve, the second valve sleeve and the third valve sleeve can be firmly clamped on the top cover through the matching of the clamping protrusion and the clamping groove; the first valve sleeve, the second valve sleeve and the third valve sleeve can be prevented from rotating relative to the top cover through the matching of the positioning protrusions and the positioning grooves.
In a further technical scheme, two first inserting holes for inserting the U-shaped inserting rods are arranged on the side face of the valve casing side by side near the upper end opening of the valve casing, and two second inserting holes for inserting the U-shaped inserting rods are arranged on the top cover side by side.
In a further technical scheme, rubber sealing rings for sealing the first channel, the second channel and the third channel are respectively arranged on the side surfaces of the first valve sleeve, the second valve sleeve and the third valve sleeve.
(III) advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) the invention is convenient to assemble;
(2) convenient disassembly and maintenance.
Drawings
FIG. 1 is a perspective view of the three-way ball valve of the embodiment;
FIG. 2 is a front view of the three-way ball valve in the embodiment;
FIG. 3 is a left side view of the three-way ball valve in the embodiment;
FIG. 4 is a schematic structural view of a valve core assembly in an embodiment;
FIG. 5 is an exploded view of the valve core assembly of the embodiment;
fig. 6 is a first schematic exploded view of the valve housing of the embodiment;
fig. 7 is a second schematic exploded view of the valve sleeve of the embodiment;
FIG. 8 is a cross-sectional view taken at A-A of FIG. 3;
fig. 9 is a schematic structural view of a valve housing in the embodiment.
Detailed Description
Referring to fig. 1-9, a three-way ball valve comprises a top cover 2 and a valve housing 1 with an opening at the upper end, wherein a first channel 1a, a second channel 1b and a third channel 1c are arranged on the side surface of the valve housing 1, the centers of the first channel 1a, the second channel 1b and the third channel 1c are positioned in the same horizontal plane, the second channel 1b and the third channel 1c are coaxial, and the top cover 2 is arranged at the opening at the upper end of the valve housing 1 through a U-shaped inserted rod 5; a valve core assembly arranged on the top cover 2 is arranged in the valve shell 1; the valve core assembly is used for controlling the connection and disconnection of the first channel 1a, the second channel 1b and the third channel 1 c.
The valve core assembly comprises a valve sleeve 3, the valve sleeve 3 comprises a first valve sleeve 31, a second valve sleeve 32 and a third valve sleeve 33, a first valve cavity is arranged in the first valve sleeve 31, a second valve cavity is arranged in the second valve sleeve 32, and a third valve cavity is arranged in the third valve sleeve 33; the first valve pocket 31, the second valve pocket 32 and the third valve pocket 33 are spliced to form the valve pockets, and the first valve cavity, the second valve cavity and the third valve cavity are spliced to form a ball valve cavity; a ball body 4 in sealing contact with the ball valve is rotatably connected in the ball valve cavity, a valve rod 41 is arranged on the ball body 4 upwards along the vertical direction, and the valve rod 41 extends out of the valve sleeve 3 and penetrates out of the top cover 2; the first valve sleeve 31 is provided with a first through hole 311 for communicating the ball valve cavity with the first channel 1a, the second valve sleeve 32 is provided with a second through hole 321 for communicating the ball valve cavity with the second channel 1b, and the third valve sleeve 33 is provided with a third through hole 331 for communicating the ball valve cavity with the third channel 1 c; two first clamping grooves 31a are formed in the left side of the first valve sleeve 31 in the vertical direction, and two second clamping grooves 31b are formed in the right side of the first valve sleeve 31; the second valve sleeve is provided with a first buckle 32a which is clamped with the first clamping groove 31a along the vertical direction at the side edge close to the first valve sleeve 31, and the second valve sleeve 32 is provided with two third clamping grooves 32b along the vertical direction at the side edge far away from the first valve sleeve 31; the third valve sleeve 33 is provided with a second buckle 33a which is connected with the second clamping groove 31b in a clamping manner along the vertical direction at a side edge close to the first valve sleeve 31, and the third valve sleeve 33 is provided with a third buckle 33b which is connected with the third clamping groove 32b in a clamping manner along the vertical direction at a side edge far away from the first valve sleeve.
An annular clamping groove 2b is formed in the circumferential side surface of the top cover 2; clamping protrusions 34 clamped into the annular clamping grooves 2b are arranged on the first valve sleeve 31, the second valve sleeve 32 and the third valve sleeve 33; three positioning grooves 2a are formed in the circumferential side face of the top cover 2 at the annular clamping groove; the first valve sleeve 31, the second valve sleeve 32 and the third valve sleeve 33 are all provided with a positioning bulge 35 matched with the positioning groove 2 a; a first communication hole 42 penetrating through the sphere 4 and a second communication hole 43 communicated with the first communication hole 42 are arranged in the sphere 4, the axis of the second communication hole 43 is perpendicular to the axis of the first communication hole 42, and the first channel 1a, the second channel 1b and the third channel 1c can be controlled to be communicated in pairs or all communicated by rotating the sphere 4 through the valve rod 41.
A first sealing ring 6a which is in sealing contact with the ball 4 is arranged at the first through hole 311 in the first valve cavity; a second sealing ring 6b which is in sealing contact with the ball 4 is arranged in the second valve cavity at the second through hole 321; and a third sealing ring 6c in sealing contact with the ball is arranged in the third through hole 331 in the third valve cavity.
Two first inserting holes 101 for inserting the U-shaped inserting rods 5 are arranged side by side on the side surface of the valve casing 1 close to the upper end opening of the valve casing, and two second inserting holes 2c for inserting the U-shaped inserting rods 5 are arranged side by side on the top cover 1.
The side surfaces of the first valve housing 31, the second valve housing 32 and the third valve housing 33 are respectively provided with a rubber seal 7 for sealing the first channel 1a, the second channel 1b and the third channel 1 c.
In the actual assembly of the present invention, the valve sleeves are firstly assembled in a clamping manner, the first valve sleeve 31, the second valve sleeve 32 and the third valve sleeve 33 respectively compress and deform the first sealing ring 6a, the second sealing ring 6b and the third sealing ring 6c correspondingly, when the first buckle 32a is clamped to the first clamping groove 31a, the second buckle 33a is clamped to the second clamping groove 31b and the third buckle 33b is clamped to the third clamping groove 32b, the first valve sleeve 31, the second valve sleeve 32 and the third valve sleeve 33 are released and move away from the ball 4 under the action of the first sealing ring 6a, the second sealing ring 6b and the third sealing ring 6c, respectively, so that the first buckle 32a is firmly clamped in the first clamping groove 31a, the second buckle 33a is firmly clamped in the second clamping groove 31b and the third buckle 33b is firmly clamped in the third clamping groove 32 b. The first valve sleeve 31, the second valve sleeve 32 and the third valve sleeve 33 can be firmly clamped on the top cover 2 through the matching of the clamping protrusion 34 and the clamping groove 2 b; the first, second and third valve housings 31, 32 and 33 are prevented from rotating with respect to the top cap 2 by the engagement of the positioning projection 35 and the positioning groove 2 a.
After the valve core assembly and the top cover 2 are combined, the valve core assembly, the top cover 2 and the valve casing 1 are integrally connected into a whole through the U-shaped inserted rod 5, and the installation is very convenient. When the three-way ball valve has a fault, the parts can be replaced only by pulling out the U-shaped inserted rod 5 and then taking out the valve core assembly, and the three-way ball valve is convenient and rapid to maintain.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A three-way ball valve comprises a top cover and a valve casing, wherein the upper end of the valve casing is provided with an opening, the side surface of the valve casing is provided with a first channel, a second channel and a third channel, the centers of the first channel, the second channel and the third channel are positioned in the same horizontal plane, and the second channel and the third channel are coaxial; a valve core assembly arranged on the top cover is arranged in the valve shell; the valve core assembly is used for controlling the connection and disconnection of the first channel, the second channel and the third channel; two first inserting holes for inserting the U-shaped inserting rods are arranged on the side surface of the valve shell side by side and close to the upper end opening of the valve shell, and two second inserting holes for inserting the U-shaped inserting rods are arranged on the top cover side by side;
the valve core assembly comprises a valve sleeve, the valve sleeve comprises a first valve sleeve, a second valve sleeve and a third valve sleeve, a first valve cavity is arranged in the first valve sleeve, a second valve cavity is arranged in the second valve sleeve, and a third valve cavity is arranged in the third valve sleeve; the first valve pocket, the second valve pocket and the third valve pocket are spliced to form the valve pockets, and the first valve pocket, the second valve pocket and the third valve pocket are spliced to form the ball valve pocket; a ball body in sealing contact with the ball valve cavity is rotatably connected in the ball valve cavity, a valve rod is arranged on the ball body upwards along the vertical direction, and the valve rod extends out of the valve sleeve and penetrates out of the top cover; the first valve sleeve is provided with a first through hole for communicating the ball valve cavity with the first channel, the second valve sleeve is provided with a second through hole for communicating the ball valve cavity with the second channel, and the third valve sleeve is provided with a third through hole for communicating the ball valve cavity with the third channel; the left side of the first valve sleeve is provided with two first clamping grooves in the vertical direction, and the right side of the first valve sleeve is provided with two second clamping grooves; the second valve sleeve is provided with a first buckle which is clamped with the first clamping groove along the vertical direction at the side edge close to the first valve sleeve, and the second valve sleeve is provided with two third clamping grooves along the vertical direction at the side edge far away from the first valve sleeve; the third valve sleeve is provided with a second buckle which is clamped with the second clamping groove along the vertical direction at the side edge close to the first valve sleeve, and the third valve sleeve is provided with a third buckle which is clamped with the third clamping groove along the vertical direction at the side edge far away from the first valve sleeve;
an annular clamping groove is formed in the circumferential side surface of the top cover; clamping protrusions clamped into the annular clamping grooves are arranged on the first valve sleeve, the second valve sleeve and the third valve sleeve; three positioning grooves are formed in the circumferential side face of the top cover at the annular clamping groove; the first valve sleeve, the second valve sleeve and the third valve sleeve are provided with positioning bulges matched with the positioning grooves; the ball body is internally provided with a first communicating hole which penetrates through the ball body and a second communicating hole which is communicated with the first communicating hole, the axis of the second communicating hole is vertical to the axis of the first communicating hole, and the ball body can be rotated by the valve rod to control the first channel, the second channel and the third channel to be communicated pairwise or be communicated completely.
2. The three-way ball valve according to claim 1, wherein a first sealing ring in sealing contact with the ball body is arranged at the first through hole in the first valve chamber; a second sealing ring which is in sealing contact with the ball body is arranged at the second through hole in the second valve cavity; and a third sealing ring in sealing contact with the ball body is arranged at the third through hole in the third valve cavity.
3. The three-way ball valve according to claim 1, wherein rubber sealing rings for sealing the first, second and third passages are provided on the side surfaces of the first, second and third valve housings, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421604.6A CN110131446B (en) | 2019-05-21 | 2019-05-21 | Three-way ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421604.6A CN110131446B (en) | 2019-05-21 | 2019-05-21 | Three-way ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110131446A CN110131446A (en) | 2019-08-16 |
| CN110131446B true CN110131446B (en) | 2020-12-15 |
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ID=67571896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910421604.6A Active CN110131446B (en) | 2019-05-21 | 2019-05-21 | Three-way ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110131446B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020118513A1 (en) | 2020-07-14 | 2022-01-20 | Henco Industries N.V. | Shut-off valve, in particular for use in sanitary areas |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4641682A (en) * | 1985-04-29 | 1987-02-10 | Baker Oil Tools, Inc. | Valve with rotary valve head |
| CN1643278A (en) * | 2002-01-18 | 2005-07-20 | 斯瓦戈洛克公司 | Ball valve with single piece packing |
| CN205824251U (en) * | 2016-07-19 | 2016-12-21 | 山东金佰特商用厨具有限公司 | A kind of setting-in volume damper |
| CN206175794U (en) * | 2016-11-22 | 2017-05-17 | 荣成市固废综合处理与应用产业园有限公司 | Ball valve or locking for ball valve valve lock |
| CN206572024U (en) * | 2017-03-17 | 2017-10-20 | 杭州创沃科技有限公司 | High leakproofness tee ball valve |
-
2019
- 2019-05-21 CN CN201910421604.6A patent/CN110131446B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4641682A (en) * | 1985-04-29 | 1987-02-10 | Baker Oil Tools, Inc. | Valve with rotary valve head |
| CN1643278A (en) * | 2002-01-18 | 2005-07-20 | 斯瓦戈洛克公司 | Ball valve with single piece packing |
| CN205824251U (en) * | 2016-07-19 | 2016-12-21 | 山东金佰特商用厨具有限公司 | A kind of setting-in volume damper |
| CN206175794U (en) * | 2016-11-22 | 2017-05-17 | 荣成市固废综合处理与应用产业园有限公司 | Ball valve or locking for ball valve valve lock |
| CN206572024U (en) * | 2017-03-17 | 2017-10-20 | 杭州创沃科技有限公司 | High leakproofness tee ball valve |
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| Publication number | Publication date |
|---|---|
| CN110131446A (en) | 2019-08-16 |
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Effective date of registration: 20201127 Address after: 318000 No.45 Huihai Road, Shanghuang Town, Yuhuan City, Taizhou City, Zhejiang Province (bingang industrial city) Applicant after: ZHEJIANG YUNDA FLUID INTELLIGENT CONTROL Co.,Ltd. Address before: 315000 188 Jinghua Road, Ningbo high tech Zone, Zhejiang (1493 tower, 041 block B block, modern building, Ningbo harbour). Applicant before: NINGBO ZHENGE HYDRAULIC TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A three-way ball valve Effective date of registration: 20220706 Granted publication date: 20201215 Pledgee: Bank of China Limited Yuhuan sub branch Pledgor: ZHEJIANG YUNDA FLUID INTELLIGENT CONTROL CO.,LTD. Registration number: Y2022330001259 |
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