CN111963706A - Novel wear-resistant round rotary valve - Google Patents
Novel wear-resistant round rotary valve Download PDFInfo
- Publication number
- CN111963706A CN111963706A CN202010989111.5A CN202010989111A CN111963706A CN 111963706 A CN111963706 A CN 111963706A CN 202010989111 A CN202010989111 A CN 202010989111A CN 111963706 A CN111963706 A CN 111963706A
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- Prior art keywords
- valve
- valve seat
- resistant
- cover
- wear
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- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 239000002184 metal Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 229910052755 nonmetal Inorganic materials 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003566 sealing material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 239000003245 coal Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000005046 Chlorosilane Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000010866 blackwater Substances 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
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
- F16K3/10—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 with special arrangements for separating the sealing faces or for pressing them together
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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
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
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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
- F16K3/0227—Packings
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
- Sliding Valves (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a novel wear-resistant round rotary valve, which comprises: first and second valve covers arranged face to face; the first valve seat and the second valve seat are respectively embedded in the first valve cover and the second valve cover; the valve plate is arranged between the first valve seat and the second valve seat, is provided with a medium through hole and is connected with the first valve cover and the second valve cover to form a medium channel; the valve plate sleeve is fixed between the first valve cover and the second valve cover; and the valve rod is connected with the valve plate sleeve, drives the valve plate to rotate when rotating, and completes the opening and closing of the medium channel by changing the position of the medium through hole. The valve has better sealing effect through plane sealing, and only the sealing material needs to be replaced after the sealing is failed, so that the utilization rate of the valve is improved, the use cost is reduced, and the service life is prolonged; meanwhile, the medium adhered to the valve plate and the valve seat can be removed through the rotary motion between the valve plate and the valve seat, the sealing performance is protected, the sealing part of the valve can be completely hidden in a fully open state and is not washed away by the medium, and the service life is greatly prolonged.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a novel wear-resistant circular rotary valve.
Background
The operating conditions of valve applications sometimes combine high temperature and pressure with a high content of hard solid particles, such as: in a coal gasification device in the coal chemical industry,and coal of coal-to-liquid, ash water, black water, coal slurry, slag water and the like in the direct liquefaction device; silicon powder/N in the material inlet and outlet device of the production process of polysilicon and organic silicon2Media such as gas phase/chlorosilanes contain a large amount of hard solid particles.
Generally, a shut-off valve is usually a traditional valve such as a gate valve, a stop valve, a ball valve and the like, but as media contain a large amount of solid particle media, for the gate valve, as the bottom of the gate valve is provided with a groove, the solid media are easy to be deposited at the bottom of the groove, so that the gate plate cannot be closed in place, and the valve fails; on the other hand, when the gate valve is fully opened, the sealing surfaces of the gate plate and the valve seat are completely exposed and can be washed by the medium, and the medium contains a large amount of hard solid particles, so that the washing abrasion of the sealing surfaces of the gate plate and the valve seat is easily caused.
For the stop valve, the valve clack sealing surface of the stop valve is directly washed by solid particle media, and is easier to wear.
For a conventional all-metal hard sealing ball valve, the ball valve usually can be expanded and clamped under the working conditions of high temperature and high pressure, the opening and closing torque is heavy, a sealing structure adopts linear sealing, and the ball valve is not suitable for a medium containing hard solid particles or has extremely short service life.
Disclosure of Invention
According to an embodiment of the present invention, there is provided a novel wear-resistant rotary valve, including:
a first valve cover and a second valve cover, the first valve cover and the second valve cover being arranged in a face-to-face manner;
the first valve seat is embedded in the first valve cover, and the second valve seat is embedded in the second valve cover;
the valve plate is arranged between the first valve seat and the second valve seat, a medium through hole is formed in the valve plate, the valve plate is perpendicular to the medium channel, and the first valve seat, the valve plate and the second valve seat are connected to form the medium channel for medium circulation;
the valve plate sleeve is fixed between the first valve cover and the second valve cover and fixes the valve plate;
and when the valve rod rotates, the valve plate is driven by the valve plate sleeve to rotate along the plane where the valve plate is located, and the opening and closing of the medium channel are completed by changing the position of the medium through hole.
Furthermore, two surfaces of the valve plate are respectively attached to the first valve seat and the second valve seat.
Furthermore, the surface roughness and the flatness of the valve plate, the first valve seat and the second valve seat are all less than 1 μm.
Further, the sealing face material between the valve plate and the first valve seat is replaceable.
Further, the method also comprises the following steps: and the two pairs of springs respectively tightly attach the first valve seat and the second valve seat to two surfaces of the valve plate.
Further, the spring is a belleville spring.
Furthermore, an O-shaped sealing ring is respectively arranged between the two ends of the first valve seat and the first valve cover and between the two ends of the second valve seat and the first valve cover.
Furthermore, the O-shaped sealing ring is a plane all-metal O-shaped sealing ring.
Further, the inner walls of the first valve seat and the second valve seat are respectively provided with a wear-resistant lining.
Further, the wear-resistant lining is a metal wear-resistant lining or a non-metal wear-resistant silicon carbide lining or a non-metal wear-resistant ceramic lining.
According to the novel wear-resistant rotary valve disclosed by the embodiment of the invention, the sealing effect is better in a plane sealing mode, and even if the sealing is failed, only the sealing material needs to be replaced, so that the utilization rate of the valve is greatly improved, the use cost is reduced, and the service life of the valve is prolonged; meanwhile, through the rotary motion between the valve plate and the valve seat, media adhered to the valve plate and the valve seat can be removed, the sealing performance is protected, in addition, the sealing part of the valve can be completely hidden in the fully open state and is not washed away by the media, and the service life of the valve is greatly prolonged.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology.
Drawings
FIG. 1 is a perspective view of a novel wear-resistant stopcock according to an embodiment of the present invention;
FIG. 2 is a top view of a novel wear resistant stopcock in accordance with an embodiment of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is a sectional view of the assembled state of FIG. 3;
fig. 5 is a schematic structural diagram of a valve plate of the novel abrasion-resistant rotary valve according to the embodiment of the invention.
Detailed Description
The present invention will be further explained by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings.
First, a novel wear-resistant rotary valve according to an embodiment of the present invention will be described with reference to fig. 1 to 5, which is used for circulation of various media in industrial production and has a wide application range.
As shown in fig. 1 to 5, the novel wear-resistant rotary valve according to the embodiment of the present invention includes a first valve cover 1, a second valve cover 2, a first valve seat 3, a second valve seat 4, a valve plate 5, a valve plate sleeve 6, and a valve rod 7. Wherein, the first valve cover 1 and the second valve cover 2 are fixedly arranged face to face through bolts, the first valve seat 3 is embedded in the first valve cover 1, the second valve seat 4 is embedded in the second valve cover 2, the valve plate 5 is fixed between the first valve seat 3 and the second valve seat 4 by the valve plate sleeve 6, the first valve seat 3, the valve plate 5 and the second valve seat 4 are connected into a medium channel 10, used for circulating medium, a valve rod 7 is connected with a valve plate sleeve 6, the valve rod 7 rotates to drive the valve plate sleeve 6 and then drive a valve plate 5 to rotate on the plane between a first valve seat 3 and a second valve seat 4, i.e. the valve plate 5 rotates in its own plane, as shown in fig. 5, the valve plate 5 is provided with medium through holes 51, the valve plate 5 is perpendicular to the medium passage 10, accordingly, the valve plate 5 is rotated to switch the valve by changing the positional relationship between the medium passage hole 51 and the medium passage 10, thereby controlling the flow of the medium.
Specifically, in this embodiment, the inner walls of the first valve seat 3 and the second valve seat 4 are respectively provided with a wear-resistant bushing, and further, the wear-resistant bushing can be according to the working condition of the actual medium of the pipeline, such as: the size and hardness of the medium particles are selected from metal wear-resistant bushings or non-metal wear-resistant silicon carbide bushings or non-metal wear-resistant ceramic bushings.
Specifically, as shown in fig. 3 and 4, two surfaces of the valve plate 5 are respectively tightly attached to the first valve seat 3 and the second valve seat 4, that is, ultra-wide plane sealing is adopted between the valve plate 5 and the first valve seat 3 and the second valve seat 4, and the sealing performance is mainly guaranteed by the machining precision.
Particularly, for the medium which is easy to coke and has viscosity, the valve plate 5 and the first valve seat 3 and the second valve seat 4 rotate to form fan-shaped shearing, so that the scraping function is naturally formed, the medium adhered to the first valve seat 3, the second valve seat 4 and the valve plate 5 is effectively removed, the sealing surface is reasonably protected, and the sealing performance and the service life are improved.
Further, in this embodiment, a sealing pair (not shown in the figure) is further respectively disposed between the valve plate 5 and the first valve seat 3, the second valve seat 4, when the valve plate 5 is stationary or rotating, because the valve plate 5 is always tightly attached to the first valve seat 3, the second valve seat 4, respectively, medium particles are not easy to enter the sealing pair, thereby avoiding the abrasion of the sealing pair, even if dust enters the gap between the valve plate 5 and the first valve seat 3, the second valve seat 4, the sealing pair will not be scratched or damaged, on the contrary, the sealing pair has a grinding effect, the grinding performed by frequent rotation of the valve plate 5 will make the sealing pair more stable, the sealing effect is better, even if part of the sealing surface is damaged, the plane sealing part around the sealing pair can continue to play a sealing role in case of no damage, thereby preventing the ball valve from being pulled by the sealing surface generated by squeezing and sealing, Damage, jam and the like.
Further, in this embodiment, the sealing surface material between valve plate 5 and the first valve seat 3 is removable, therefore, under the condition that sealing surface material damaged, as long as change sealing surface material, improved the utilization ratio of valve greatly, reduced use cost.
Specifically, as shown in fig. 3 and 4, the valve plate sleeve 6 is fixed between the first valve cover 1 and the second valve cover 2, the valve plate 5 is fixed by the valve plate sleeve 6, the valve rod 7 is connected with the valve plate sleeve 6, when the valve rod 7 rotates, the valve plate 5 is driven by the valve plate sleeve 6 to rotate along the plane of the valve plate 5, and the opening and closing of the medium passage 10 are completed by changing the position of the medium through hole 51.
Specifically, as shown in fig. 3 and 4, the method further includes: two pairs of springs 8, a pair of spring 8 sets up between the both ends of first disk seat 3 and first valve gap 1, and another pair of spring 8 sets up between the both ends of second valve seat 4 and first valve gap 1 to through the driving force of two pairs of springs 8 and medium, make first disk seat 3 and second valve seat 4 closely laminate respectively in the two sides of valve plate 5, further promoted the sealing performance between valve plate 5 and first disk seat 3 and the second valve seat 4. In the present embodiment, the spring 8 is a belleville spring.
Further, in order to prevent fine particle media from entering the first valve seat 3 and the second valve seat 4 and being stuck and blocked in the back during use, and causing the failure of the spring 8 behind the first valve seat 3 and the second valve seat 4, in this embodiment, an O-ring 9 is respectively disposed between two ends of the first valve seat 3 and the first valve cover 1, and between two ends of the second valve seat 4 and the first valve cover 1. In this embodiment, the O-ring 9 is a planar all-metal O-ring, which compensates for the cold contraction and the hot expansion of each component of the valve caused by the medium temperature, and solves the problem of valve leakage caused by the locking due to high temperature and hot expansion or cold contraction.
When the valve is used, as shown in fig. 1 to 5, a medium flows into the medium channel 10 through the medium pipeline 11 connected with the medium channel 10, the valve rod 7 is rotated through the external driving swing rod 12, so that the valve plate sleeve 6 is driven to drive the valve plate 5 to rotate, when the medium through hole 51 on the valve plate 5 is completely overlapped with the medium channel 10, the valve is in a full-open state, when the medium through hole 51 is completely staggered with the medium channel 10, the valve is in a full-close state, and when the medium through hole 51 is partially overlapped with the medium channel 10, the valve is in a half-open state.
When the valve is fully closed, the medium through hole 51 rotates away from the medium passage 10, and both ends of the medium through hole are respectively closed by the first valve seat 3 and the second valve seat 4, the medium through hole 51 can not flow through the medium any more, and the valve plate 5 has a certain thickness, so that the medium through hole 51, the first valve seat 3 and the second valve seat 4 form a closed valve cavity, therefore, part of the medium may be left in the valve cavity to be temporarily accumulated, and when the valve is fully opened, the accumulated medium in the valve cavity enters the medium passage 10 again. When the valve is fully opened, the valve plate 5, the first valve seat 3 and the second valve seat 4 are mutually overlapped, the sealing part of the whole valve is completely hidden, the valve cannot be washed by media, and the service life of the valve is prolonged.
In the above, with reference to fig. 1 to 5, the novel wear-resistant rotary valve according to the embodiment of the invention is described, the sealing effect is better in a plane sealing manner, and even if the sealing is failed, only the sealing material needs to be replaced, so that the utilization rate of the valve is greatly improved, the use cost is reduced, and the service life of the valve is prolonged; meanwhile, through the rotary motion between the valve plate and the valve seat, media adhered to the valve plate and the valve seat can be removed, the sealing performance is protected, in addition, the sealing part of the valve can be completely hidden in the fully open state and is not washed away by the media, and the service life of the valve is greatly prolonged.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. The utility model provides a novel wear-resisting circle rotary valve which characterized in that contains:
a first valve cover and a second valve cover, the first valve cover and the second valve cover being arranged in a face-to-face manner;
the first valve seat is embedded in the first valve cover, and the second valve seat is embedded in the second valve cover;
the valve plate is arranged between the first valve seat and the second valve seat, a medium through hole is formed in the valve plate, the valve plate is perpendicular to the medium channel, and the first valve seat, the valve plate and the second valve seat are connected to form the medium channel for medium circulation;
the valve plate sleeve is fixed between the first valve cover and the second valve cover and fixes the valve plate;
and the valve rod is connected with the valve plate sleeve, when the valve rod rotates, the valve plate is driven by the valve plate sleeve to rotate along the plane where the valve plate is located, and the opening and closing of the medium channel are completed by changing the position of the medium through hole.
2. The new wear-resistant rotary valve as claimed in claim 1, wherein two faces of said valve plate are respectively abutted against said first valve seat and said second valve seat.
3. The novel abrasion-resistant circular stopcock of claim 2 wherein the surface roughness and flatness of said valve plate, said first valve seat and said second valve seat are less than 1 μm.
4. A novel wear-resistant stopcock as claimed in claim 3 wherein the material of the sealing surface between the valve plate and the first valve seat is replaceable.
5. The new wear-resistant stopcock of claim 1, further comprising: the two pairs of springs are arranged between the two ends of the first valve seat and the first valve cover, the two ends of the second valve seat and the first valve cover are respectively provided with another pair of springs, and the two pairs of springs respectively tightly attach the first valve seat and the second valve seat to the two surfaces of the valve plate.
6. The novel wear-resistant stopcock of claim 5 wherein said spring is a belleville spring.
7. The new wear-resistant stopcock as claimed in claim 1 or 5, wherein an O-ring is disposed between each end of said first valve seat and said first valve cover, and between each end of said second valve seat and said first valve cover.
8. The new wear-resistant stopcock of claim 7 wherein said O-ring is a planar all-metal O-ring.
9. The novel wear-resistant rotary valve as claimed in claim 1, wherein the inner walls of the first valve seat and the second valve seat are respectively provided with wear-resistant bushings.
10. The new wear-resistant stopcock of claim 9 wherein the wear-resistant liner is a metal wear-resistant liner or a non-metal wear-resistant silicon carbide liner or a non-metal wear-resistant ceramic liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010989111.5A CN111963706A (en) | 2020-09-18 | 2020-09-18 | Novel wear-resistant round rotary valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010989111.5A CN111963706A (en) | 2020-09-18 | 2020-09-18 | Novel wear-resistant round rotary valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111963706A true CN111963706A (en) | 2020-11-20 |
Family
ID=73387374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010989111.5A Pending CN111963706A (en) | 2020-09-18 | 2020-09-18 | Novel wear-resistant round rotary valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111963706A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11280416B1 (en) | 2020-11-25 | 2022-03-22 | Zhejiang Petrochemical Valve Co., Ltd. | High-temperature quick-opening spherical sealing shut-off valve |
| WO2022110342A1 (en) * | 2020-11-25 | 2022-06-02 | 浙江石化阀门有限公司 | High-temperature quick-opening spherical sealing shut-off valve |
| CN116717642A (en) * | 2023-08-07 | 2023-09-08 | 山东阳光博士太阳能工程有限公司 | Pipeline connecting device of photo-thermal and photovoltaic integrated assembly |
-
2020
- 2020-09-18 CN CN202010989111.5A patent/CN111963706A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11280416B1 (en) | 2020-11-25 | 2022-03-22 | Zhejiang Petrochemical Valve Co., Ltd. | High-temperature quick-opening spherical sealing shut-off valve |
| WO2022110342A1 (en) * | 2020-11-25 | 2022-06-02 | 浙江石化阀门有限公司 | High-temperature quick-opening spherical sealing shut-off valve |
| CN116717642A (en) * | 2023-08-07 | 2023-09-08 | 山东阳光博士太阳能工程有限公司 | Pipeline connecting device of photo-thermal and photovoltaic integrated assembly |
| CN116717642B (en) * | 2023-08-07 | 2023-11-03 | 山东阳光博士太阳能工程有限公司 | Pipeline connecting device of photo-thermal and photovoltaic integrated assembly |
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