CN113494622A - Long-life angle valve - Google Patents
Long-life angle valve Download PDFInfo
- Publication number
- CN113494622A CN113494622A CN202110859325.5A CN202110859325A CN113494622A CN 113494622 A CN113494622 A CN 113494622A CN 202110859325 A CN202110859325 A CN 202110859325A CN 113494622 A CN113494622 A CN 113494622A
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- sector
- sleeve
- valve
- rotor
- sealing strip
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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
- 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
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
- F16K3/06—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages
- F16K3/08—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages with circular plates rotatable around their centres
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention relates to a long-life angle valve, comprising: the valve comprises a valve body, a sleeve, a static sheet and a dynamic sheet, wherein the sleeve is arranged in the valve body, and the inner side wall of the sleeve is provided with a chute; the stator is fixedly arranged in the sleeve and consists of a first sector part and a second sector part, and cambered surfaces on the first sector part and the second sector part are tightly attached to the inner wall of the sleeve, so that a first sector through hole and a second sector through hole are formed between the stator and the sleeve; the rotor rotates and sets up in the sleeve, and the rotor comprises third sector and fourth sector, and the rotor can be followed the chute rotation to be close to the stator, when rotor and stator laminating, first fan-shaped through-hole and the fan-shaped through-hole of second can be sealed to third sector and fourth sector. The invention has the advantages that: the moving piece is limited to move through the chute on the sleeve, so that the moving piece rotates and moves upwards along the sliding rail to be far away from the static piece, mutual friction between the moving piece and the static piece is prevented, and the service life is prolonged.
Description
Technical Field
The invention relates to the field of angle valves, in particular to an angle valve with a long service life.
Background
The angle valve is a full-scale angle type stop valve, is similar to a ball valve, is modified from a ball valve in structure and characteristic, and is different from the ball valve in that an outlet and an inlet of the angle valve form a right angle, so the angle valve is also called a triangular valve, an angle valve and a bevel water valve, the angle valve rotates a handle by 90 degrees to switch between a completely closed state and a completely conducted state, the existing angle valve clack device is formed by matching and connecting a movable plate and a fixed plate, the movable plate and the fixed plate are made of ceramic materials, through grooves for water passing are formed in the movable plate and the fixed plate, and when the angle valve device is used for a long time, a gap is generated by abrasion between the movable plate and the fixed plate along with mutual friction of the movable plate and the fixed plate, so that liquid leakage is easy to occur, and the angle valve is designed to solve the problems.
Disclosure of Invention
In view of the above, it is desirable to provide a long life angle valve.
The invention discloses a long-life angle valve, which comprises: the valve body is provided with an inlet and an outlet, the inlet is arranged at the bottom of the valve body, and the outlet is arranged on the side surface of the valve body; the sleeve is arranged in the valve body, the lower end of the sleeve is communicated with the inlet, a through-flow hole is formed in the side face of the sleeve and is communicated with the outlet, and a chute is formed in the inner side wall of the sleeve; the stator is fixedly arranged in the sleeve and consists of a first sector part and a second sector part, and cambered surfaces on the first sector part and the second sector part are tightly attached to the inner wall of the sleeve, so that a first sector through hole and a second sector through hole are formed between the stator and the sleeve; the rotor, the rotation set up in the sleeve, the rotor comprises third sector and fourth sector, be provided with the slider on the rotor, the slider stretches into in the chute, through the rotation the rotor can make the rotor is followed the chute is close to the stator, works as when the rotor is laminated with the stator, third sector and fourth sector can seal first fan-shaped through-hole and the fan-shaped through-hole of second.
In one embodiment, the first sector and the second sector are centrosymmetric; the third sector and the fourth sector are centrosymmetric.
In one embodiment, a first accommodating groove is formed in the first sector along the radial direction, and a first elastic element and a first sealing strip are arranged in the first accommodating groove; a second containing groove is formed in the second fan-shaped portion in the radial direction, a second elastic piece and a second sealing strip are arranged in the second containing groove, and the first sealing strip and the second sealing strip are in central symmetry.
In one embodiment, a third accommodating groove is formed in the third sector portion along the radial direction, and a third elastic element and a third sealing strip are arranged in the third accommodating groove; a fourth containing groove is formed in the fourth sector part along the radius direction, and a fourth elastic piece and a fourth sealing strip are arranged in the fourth containing groove; the third sealing strip and the fourth sealing strip are in central symmetry.
In one embodiment, the first sealing strip and the second sealing strip abut against the moving plate, the third sealing strip and the fourth sealing strip abut against the fixed plate, when the moving plate rotates, the surface of the moving plate can be wiped by the first sealing strip and the second sealing strip, and the surface of the fixed plate can be wiped by the third sealing strip and the fourth sealing strip.
In one embodiment, the third sector is provided with a first connecting groove, the long-life angle valve further comprises a valve rod, a first shifting block is arranged at the lower end of the valve rod and extends into the first connecting groove, and the valve rod is rotated to drive the movable plate to rotate.
In one embodiment, a valve cover is fixedly arranged at the upper end of the valve body, and the valve rod penetrates through the valve cover and is fixedly connected with the rotary handle.
In one embodiment, a second connecting groove is formed in the fourth sector, and a second shifting block is further arranged at the lower end of the valve rod and extends into the second connecting groove.
In one embodiment, the sleeve is further provided with a horizontal groove, the horizontal groove is communicated with the inclined groove, and after the moving plate is attached to the static plate, the moving plate continues to rotate, and the sliding block can enter the horizontal groove.
The invention has the advantages that:
1. the movement of the moving plate is limited by the chute on the sleeve, so that the moving plate rotates and moves upwards along the slide rail to be far away from the static plate, thereby preventing the mutual friction between the moving plate and the static plate and prolonging the service life;
2. the movable plate and the static plate are more convenient to mount through the modular design, the static plate is firstly mounted on the sleeve, the movable plate is mounted in the sleeve, and the movable plate and the static plate are connected through the bolt, so that the aim of convenient mounting is fulfilled;
3. when the angle valve is opened and closed, the third sealing strip and the fourth sealing strip on the moving plate are driven to clean the contact surface of the static plate through rotation, the first sealing strip and the second sealing strip on the static plate clean the contact surface of the moving plate, impurities cannot be left between the moving plate and the static plate, and therefore the moving plate and the static plate are smooth and clean, and the sealing surface can be effectively protected.
Drawings
FIG. 1 is a cross-sectional view of the angle valve of the present invention in a closed state;
FIG. 2 is a cross-sectional view of the angle valve of the present invention in an open state;
FIG. 3 is a half-sectional view, from a perspective view, of the sleeve of the present invention;
FIG. 4 is a three-dimensional view of the valve stem of the present invention;
FIG. 5 is a three-dimensional view of a stator plate of the present invention;
FIG. 6 is a three-dimensional view of a rotor of the present invention;
FIG. 7 is a three-dimensional view of the rotor from another perspective of the present invention;
FIG. 8 is a perspective view of the present invention with the moving and stationary plates closed;
FIG. 9 is a perspective view of the present invention with the moving and stationary plates open;
FIG. 10 is a partial cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
fig. 11 is a cross-sectional view taken along the line B-B of fig. 2 in accordance with the present invention.
In the figure, the valve body 1, the inlet 11, the outlet 12, the sleeve 2, the through-flow hole 21, the inclined groove 13, the horizontal groove 14, the stationary plate 3, the first sector 31, the first receiving groove 311, the first elastic member 312, the first seal 313, the second sector 32, the second seal 323, the first sector hole 33, the second sector hole 34, the movable plate 4, the third sector 41, the third seal 413, the first connecting groove 414, the fourth sector 42, the fourth receiving groove 421, the fourth elastic member 422, the fourth seal 423, the second connecting groove 424, the slider 43, the bonnet 5, the valve rod 6, the first dial 61, the second dial 62, and the rotary handle 7.
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.
The invention discloses a long-life angle valve, which comprises: valve body 1, sleeve 2, stator 3, rotor 4.
The valve body 1 is provided with an inlet 11 and an outlet 12, the inlet 11 is arranged at the bottom of the valve body 1, and the outlet 12 is arranged at the side surface of the valve body 1; the sleeve 2 is arranged in the valve body 1, the lower end of the sleeve 2 is communicated with the inlet 11, as shown in fig. 3, a through-flow hole 21 is formed in the side surface of the sleeve 2, the through-flow hole 21 is communicated with the outlet 12, and an inclined groove 13 is formed in the inner side wall of the sleeve 2; the stator 3 is fixedly arranged in the sleeve 2, as shown in fig. 5, the stator 3 is composed of a first sector 31 and a second sector 32, and the arc surfaces of the first sector 31 and the second sector 32 are tightly attached to the inner wall of the sleeve 2, so that a first sector hole 33 and a second sector hole 34 are formed between the stator 3 and the sleeve 2; the rotor 4 is rotatably disposed in the sleeve 2, as shown in fig. 6 and 7, the rotor 4 is composed of a third sector 41 and a fourth sector 42, a slider 43 is disposed on the rotor 4, the slider 43 extends into the chute 13, and the rotor 4 can be rotated to enable the rotor 4 to be close to the stator 3 along the chute 13, when the rotor 4 is attached to the stator 3, the third sector 41 can seal the first sector 33, and the fourth sector 42 can seal the second sector 34.
It should be mentioned that, in this embodiment, the sliding block 43 is a plug pin, and is inserted into the moving plate 4 and can slide in the chute 13, and the fixed plate 3 is also fixedly connected to the sleeve 2 through the plug pin, so that the angle valve has a modular structure, and is more convenient to install, disassemble and maintain.
Preferably, the first sector 31 and the second sector 32 are centrosymmetric; the third sector 41 and the fourth sector 42 are centrosymmetric.
Preferably, a first receiving groove 311 is formed in the first sector portion 31 along the radial direction, and a first elastic member 312 and a first sealing strip 313 are disposed in the first receiving groove 311; a second receiving groove (not shown) is formed in the second sector portion 32 along the radial direction, a second elastic member (not shown) and a second sealing strip 323 are disposed in the second receiving groove, and the first sealing strip 313 and the second sealing strip 323 are in central symmetry.
Preferably, a third receiving groove (not shown) is formed in the third sector portion 41 along the radial direction, and a third elastic member (not shown) and a third sealing strip 413 are disposed in the third receiving groove; a fourth accommodating groove 421 is formed in the fourth sector portion 42 along the radial direction, and a fourth elastic element 422 and a fourth sealing strip 423 are disposed in the fourth accommodating groove 421; the third sealing strip 413 and the fourth sealing strip 423 are in central symmetry.
Preferably, the first sealing strip 313 and the second sealing strip 323 abut against the moving plate 4, the third sealing strip 413 and the fourth sealing strip 423 abut against the fixed plate 3, when the moving plate 4 rotates, the first sealing strip 313 and the second sealing strip 323 can wipe the surface of the moving plate 4, and the third sealing strip 413 and the fourth sealing strip 423 can wipe the surface of the fixed plate 3.
Preferably, be provided with first connecting groove 414 on the third fan-shaped portion 41, long-life angle valve still includes valve rod 6, as shown in fig. 4, valve rod 6 lower extreme is provided with first shifting block 61, first shifting block 61 stretches into in the first connecting groove 414, through the rotation valve rod 6 can drive the rotor 4 is rotatory.
Preferably, a valve cover 5 is fixedly arranged at the upper end of the valve body 1, and the valve rod 6 penetrates through the valve cover 5 and is fixedly connected with a rotating handle 7.
Preferably, a second connecting groove 424 is formed in the fourth sector 42, and a second shifting block 62 is further disposed at the lower end of the valve rod 6, where the second shifting block 62 extends into the second connecting groove 424.
Preferably, a horizontal groove 14 is further formed in the sleeve 1, the horizontal groove 14 is communicated with the inclined groove 13, when the moving plate 4 is attached to the fixed plate 3, the moving plate 4 continues to rotate, and the sliding block 43 can enter the horizontal groove 14.
The working mode of the invention is as follows: as shown in fig. 8, in the angular valve closed state, the movable plate 4 and the stationary plate 3 are in a positional relationship, and at this time, the movable plate 4 blocks the first fan-shaped hole 33 and the second fan-shaped hole 34. When the angle valve needs to be opened, the valve rod 6 is rotated, the valve rod 6 drives the movable plate 4 to rotate, the sliding block 43 is made to move along the horizontal groove 14 and then enters the chute 13, and the chute 13 continues to move, so that the movable plate 4 is far away from the static plate 3, the first fan-shaped hole 33 and the second fan-shaped hole 34 are opened, the inlet 11 is made to be communicated with the outlet 12 through the through hole 21 and the first fan-shaped hole 33, and the movable plate 4 is prevented from being attached to the static plate 3 all the time in the opening process of the angle valve, and accordingly the static plate 3 and the movable plate 4 are prevented from being abraded.
It is worth mentioning that the first sealing strip 313 always abuts against the third sector 41 under the action of the first elastic element 312, the second sealing strip 323 always abuts against the fourth sector 42 under the action of the second elastic element, the third sealing strip 413 always abuts against the first sector 31 under the action of the third elastic element, and the fourth sealing strip 423 always abuts against the second sector 32 under the action of the fourth elastic element 422, so that the sealing strips can wipe the surface of the sectors along with the rotation of the rotor 4, remove attachments, and avoid the corrosion of the attachments to the components.
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 (9)
1. A long life angle valve, said long life angle valve comprising:
the valve body is provided with an inlet and an outlet, the inlet is arranged at the bottom of the valve body, and the outlet is arranged on the side surface of the valve body;
the sleeve is arranged in the valve body, the lower end of the sleeve is communicated with the inlet, a through-flow hole is formed in the side face of the sleeve and is communicated with the outlet, and a chute is formed in the inner side wall of the sleeve;
the stator is fixedly arranged in the sleeve and consists of a first sector part and a second sector part, and cambered surfaces on the first sector part and the second sector part are tightly attached to the inner wall of the sleeve, so that a first sector through hole and a second sector through hole are formed between the stator and the sleeve;
the rotor, the rotation set up in the sleeve, the rotor comprises third sector and fourth sector, be provided with the slider on the rotor, the slider stretches into in the chute, through the rotation the rotor can make the rotor is followed the chute is close to the stator, works as when the rotor is laminated with the stator, third sector and fourth sector can seal first fan-shaped through-hole and the fan-shaped through-hole of second.
2. The long life angle valve of claim 1, wherein said first and second sectors are centrosymmetric; the third sector and the fourth sector are centrosymmetric.
3. The long life angle valve of claim 2, wherein said first sector defines a first receiving slot along a radial direction, said first receiving slot defining a first resilient member and a first sealing strip; a second containing groove is formed in the second fan-shaped portion in the radial direction, a second elastic piece and a second sealing strip are arranged in the second containing groove, and the first sealing strip and the second sealing strip are in central symmetry.
4. The long life angle valve of claim 3, wherein a third receiving groove is formed in said third sector portion along a radial direction, and a third elastic member and a third sealing strip are disposed in said third receiving groove; a fourth containing groove is formed in the fourth sector part along the radius direction, and a fourth elastic piece and a fourth sealing strip are arranged in the fourth containing groove; the third sealing strip and the fourth sealing strip are in central symmetry.
5. The long life angle valve of claim 4, wherein said first and second sealing strips abut against said moving plate, said third and fourth sealing strips abut against said stationary plate, and when said moving plate rotates, said first and second sealing strips can wipe the surface of said moving plate, and said third and fourth sealing strips can wipe the surface of said stationary plate.
6. The long life angle valve of claim 1, wherein a first connecting groove is formed in the third sector, the long life angle valve further comprises a valve rod, a first shifting block is arranged at the lower end of the valve rod, the first shifting block extends into the first connecting groove, and the rotating piece can be driven to rotate by rotating the valve rod.
7. The long life angle valve of claim 6, wherein a valve cover is fixedly disposed on an upper end of the valve body, and the valve rod is fixedly connected with the rotary handle through the valve cover.
8. The long life angle valve of claim 6, wherein said fourth sector has a second connecting slot formed therein, and said lower end of said valve stem has a second finger extending into said second connecting slot.
9. The long life angle valve of claim 1, wherein said sleeve further defines a horizontal slot, said horizontal slot communicating with said angled slot, said slider being capable of entering said horizontal slot by continuing to rotate said rotor after said rotor is engaged with said stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859325.5A CN113494622B (en) | 2021-07-28 | 2021-07-28 | Angle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110859325.5A CN113494622B (en) | 2021-07-28 | 2021-07-28 | Angle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113494622A true CN113494622A (en) | 2021-10-12 |
| CN113494622B CN113494622B (en) | 2023-06-02 |
Family
ID=77996525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110859325.5A Active CN113494622B (en) | 2021-07-28 | 2021-07-28 | Angle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113494622B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0103710A1 (en) * | 1982-09-18 | 1984-03-28 | Ideal-Standard Gmbh | Upper part cartouche for a sanitary single shut-off valve |
| CN201416663Y (en) * | 2009-06-06 | 2010-03-03 | 行作杰 | Novel quick-opening diaphragm water faucet |
| CN203857069U (en) * | 2014-03-24 | 2014-10-01 | 洪亚团 | Self-sealing ceramic water-saving valve |
| CN107339452A (en) * | 2017-09-05 | 2017-11-10 | 广东工业大学 | A kind of tap |
| JP2020056467A (en) * | 2018-10-03 | 2020-04-09 | イーグル工業株式会社 | Flow regulating valve |
| CN212718091U (en) * | 2020-07-15 | 2021-03-16 | 台州筠岗铜业股份有限公司 | Angle valve |
-
2021
- 2021-07-28 CN CN202110859325.5A patent/CN113494622B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0103710A1 (en) * | 1982-09-18 | 1984-03-28 | Ideal-Standard Gmbh | Upper part cartouche for a sanitary single shut-off valve |
| CN201416663Y (en) * | 2009-06-06 | 2010-03-03 | 行作杰 | Novel quick-opening diaphragm water faucet |
| CN203857069U (en) * | 2014-03-24 | 2014-10-01 | 洪亚团 | Self-sealing ceramic water-saving valve |
| CN107339452A (en) * | 2017-09-05 | 2017-11-10 | 广东工业大学 | A kind of tap |
| JP2020056467A (en) * | 2018-10-03 | 2020-04-09 | イーグル工業株式会社 | Flow regulating valve |
| CN212718091U (en) * | 2020-07-15 | 2021-03-16 | 台州筠岗铜业股份有限公司 | Angle valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113494622B (en) | 2023-06-02 |
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Effective date of registration: 20230506 Address after: 265600 Fengtai Development Zone, BEIGOU Town, Penglai City, Yantai City, Shandong Province Applicant after: Penglai Huande Steel Valve Co.,Ltd. Address before: 250000 block B, Shanda Luneng science and technology building, No. 29-1, Shanda South Road, Licheng District, Jinan City, Shandong Province Applicant before: Chen Yuxia |
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