CN114935027A - Flange check valve with automatic regulating function - Google Patents
Flange check valve with automatic regulating function Download PDFInfo
- Publication number
- CN114935027A CN114935027A CN202210791161.1A CN202210791161A CN114935027A CN 114935027 A CN114935027 A CN 114935027A CN 202210791161 A CN202210791161 A CN 202210791161A CN 114935027 A CN114935027 A CN 114935027A
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- China
- Prior art keywords
- sleeve
- valve body
- valve
- inner cavity
- pin shaft
- 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.)
- Withdrawn
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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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
- F16K15/1821—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for check valves with a hinged or pivoted closure member
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
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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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
- F16K27/0227—Check valves or pivoted valves with the valve members swinging around an axis located at the edge of or outside the valve member
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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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a flange check valve with an automatic adjusting function, which comprises a valve body, wherein a sealing cover is arranged at the top end of the valve body, a valve plate is arranged in the inner cavity of the valve body, a plurality of sliding grooves are arranged in the inner cavity of the valve body, a lifting plate is arranged in the inner cavity of the valve body, the edge of the lifting plate is provided with a bulge which is embedded into the sliding groove and can lift along the length direction of the sliding groove, an air bag is arranged in the inner cavity of the valve body, an air pump is fixedly arranged on the outer surface of the valve body, an air outlet pipe of the air pump is connected with the air bag and controls the air inflation and the air exhaust of the air bag, the lower surface of the lifting plate is fixedly provided with a first pin shaft connecting component, the right side surface of the valve plate is fixedly provided with a second pin shaft connecting component, and a connecting mechanism is further arranged in the inner cavity of the valve body, and two ends of the connecting mechanism are movably connected with the first pin shaft connecting assembly and the second pin shaft connecting assembly respectively. The invention has the advantages of high adjusting speed and good buffering performance.
Description
Technical Field
The invention relates to the technical field of structural improvement of flange check valves, in particular to a flange check valve with an automatic adjusting function.
Background
The flange check valve is a valve which automatically opens and closes a valve flap by the flow of a medium and is used for preventing the medium from flowing backwards, and is also called a check valve, a one-way valve, a reverse flow valve and a back pressure valve. The existing flange check valve is adjusted manually mostly in the using process, the liquid flow and pressure inside the flange valve cannot be rapidly adjusted according to real-time requirements, the manual adjustment labor intensity is high, and the working efficiency is low. In order to solve the above technical problems, it is necessary to design a flange check valve capable of rapidly adjusting the pressure and flow rate of a liquid.
Disclosure of Invention
The invention aims to solve the problems and designs a flange check valve with an automatic adjusting function.
The technical scheme of the invention is that the flange check valve with the automatic adjusting function comprises a valve body, a sealing cover is arranged at the top end of the valve body, a valve plate is arranged in an inner cavity of the valve body and is positioned at a liquid inlet of the inner cavity of the valve body, the upper edge of the valve plate is movably connected with the inner surface of the valve body above the liquid inlet through a rotating shaft, the size of the valve plate is matched with the size of the liquid inlet and ensures that the left side surface of the valve plate covers the liquid inlet, a plug body is fixedly arranged on the left side surface of the valve plate and can plug the liquid inlet,
the inner cavity of the valve body is provided with a plurality of sliding grooves, the sliding grooves are all positioned at the upper part of the inner cavity of the valve body, the sliding grooves are arranged on the inner surface of the inner cavity of the valve body from top to bottom, a lifting plate is arranged in the inner cavity of the valve body, the lifting plate is vertical to the length direction of the sliding grooves, the edges of the lifting plate are provided with protrusions, the protrusions are embedded into the sliding grooves and can lift along the length direction of the sliding grooves, an air bag is arranged in the inner cavity of the valve body and is positioned between the lifting plate and a sealing cover, the side wall of the valve body is provided with a through hole, the through hole is positioned at the upper part of the valve body and is close to the sealing cover, the through hole is communicated with the inner cavity of the valve body, an air pump is fixedly arranged on the outer surface of the valve body, an air outlet pipe of the air pump is connected with the air bag and controls the inflation and the exhaust of the air bag, and a first pin shaft connecting component is fixedly arranged on the lower surface of the lifting plate, the right side face of valve plate fixed mounting round pin coupling assembling two, still be equipped with coupling mechanism in the valve body inner chamber, coupling mechanism's both ends respectively with round pin coupling assembling one and round pin coupling assembling two swing joint, when the valve plate is counter-clockwise rotatory under the promotion of liquid of inlet opening department, coupling mechanism can promote the lifter plate upwards to slide and extrude the gasbag.
The connecting mechanism comprises a first sleeve, a second sleeve and a connecting rod, one end of the connecting rod is inserted into one end of the first sleeve, the other end of the connecting rod is inserted into one end of the second sleeve, the connecting rod is sleeved with a spring, one end of the spring is fixedly connected with one end of the first sleeve, the other end of the spring is fixedly connected with one end of the second sleeve, the other end of the first sleeve and the other end of the second sleeve are fixedly provided with pin shafts, the other end of the first sleeve is movably connected with a connecting assembly through a pin shaft, and the other end of the second sleeve is movably connected with the connecting assembly through a pin shaft.
When valve plate anticlockwise rotation, the right flank of valve plate promotes two sleeves and slides and extrude the spring and promote sleeve pipe one along the length direction of link, and whole coupling mechanism's length is compressed, the ascending and extrusion of a sleeve pipe drive lifter plate along the length direction of spout aerifys the expanded gasbag of back, the gasbag produces elastic deformation and produces elasticity, elasticity can restrict the turned angle of valve plate, and then adjusts the liquid flow and the pressure of inlet port department.
When the left surface of valve plate covers the liquid inlet, the right flank pulling sleeve pipe two, connecting rod, spring and the sleeve pipe of valve plate are elongated whole coupling mechanism in the lump, the lifter plate descends to the bottom of spout along the length direction of spout under the effect of gasbag elasticity and self gravity, the top of spout upwards is close to the through-hole on the valve body lateral wall.
The spring keeps a compressed state continuously in the process that the second sleeve is pushed or pulled, the protrusion on the edge of the lifting plate is an arc protrusion, and the cross section of the sliding groove is matched with the arc protrusion.
The air bag adjusts the volume of the air bag and the generated elastic force in the modes of inflating and exhausting by the air pump, and further limits and adjusts the liquid flow and the pressure at the hydraulic port.
The first sleeve and the second sleeve are pipe fittings with one ends closed and the other ends open, the cross section size of the connecting rod is matched with the inner sizes of the first sleeve and the second sleeve, and interference fit is formed when the two ends of the connecting rod are respectively inserted into the open end of the first sleeve and the open end of the second sleeve.
The first sleeve and the second sleeve are round pipes, the connecting rod is a round rod, and the sum of the length value of the first sleeve, the length value of the second sleeve and the length value of the connecting rod is larger than the distance value between the first pin shaft connecting assembly and the second pin shaft connecting assembly.
The first pin shaft connecting assembly and the second pin shaft connecting assembly are both composed of two connecting pieces, the two connecting pieces are parallel to each other, pin shaft holes are formed in the two connecting pieces, and two ends of the pin shaft can be inserted into the pin shaft holes in the two connecting pieces respectively.
Advantageous effects
The flange check valve with the automatic adjusting function manufactured by the technical scheme of the invention has the following advantages:
1. the device controls and adjusts the flow and pressure of liquid in the flange check valve by controlling the electric air pump to inflate and exhaust the air bag, manual adjustment is not needed, the adjusting speed is high, the labor intensity of workers is effectively reduced, and the working efficiency is improved;
2. this device provides sufficient buffering for opening of valve plate through the cooperation of gasbag and spring, and the effectual too big impact that causes the valve plate of having avoided liquid pressure has reduced the damage that the valve plate received, has prolonged the life of valve plate.
Drawings
FIG. 1 is a schematic structural view of a flange check valve with an automatic adjusting function according to the present invention when a valve plate is closed;
FIG. 2 is a schematic structural view of a flange check valve with an automatic adjusting function according to the present invention when a valve plate is opened;
FIG. 3 is a schematic cross-sectional view of the upper portion of the valve body of the present invention;
FIG. 4 is a schematic view of the lifter plate of the present invention;
in the figure, 1, a valve body; 2. a sealing cover; 3. a valve plate; 4. a plug body; 5. a chute; 6. a lifting plate; 7. a protrusion; 8. an air bag; 9. an air pump; 10. an air outlet pipe; 11. a first sleeve; 12. a second sleeve; 13. a connecting rod; 14. a spring; 15. and (7) connecting the sheet.
Detailed Description
The invention is described in detail below with reference to the drawings, as shown in FIGS. 1-4;
the application is characterized in that a plurality of sliding grooves 5 are arranged in an inner cavity of the valve body and are positioned on the upper portion of the inner cavity of the valve body, the sliding grooves are arranged on the inner surface of the inner cavity of the valve body from top to bottom, a lifting plate 6 is arranged in the inner cavity of the valve body and is perpendicular to the length direction of the sliding grooves, protrusions 7 are arranged on the edges of the lifting plate, are embedded into the sliding grooves and can lift along the length direction of the sliding grooves, air bags 8 are arranged in the inner cavity of the valve body and are positioned between the lifting plate and a sealing cover, through holes are formed in the side wall of the valve body and are positioned on the upper portion of the valve body and close to the sealing cover, the through holes are communicated with the inner cavity of the valve body, an air pump 9 is fixedly installed on the outer surface of the valve body, an air outlet pipe 10 of the air pump is connected with the air bags and controls the inflation and the exhaust of the air bags, and a first lower surface fixing pin shaft connecting assembly of the lifting plate is installed, the right flank fixed mounting round pin hub connection subassembly two of valve plate, still be equipped with coupling mechanism in the valve body inner chamber, coupling mechanism's both ends respectively with round pin hub connection subassembly one and round pin hub connection subassembly two swing joint, when the valve plate when the promotion of liquid of inlet port department anticlockwise rotation, coupling mechanism can promote the lifter plate upwards to slide and extrude the gasbag.
The creation point of the application still lies in that, coupling mechanism includes sleeve pipe 11, two 12 and connecting rod 13 triplets, the one end of sleeve pipe one is inserted to the one end of connecting rod, the other end of connecting rod inserts the one end of sleeve pipe two, the cover has spring 14 on the connecting rod, the one end of spring and the one end fixed connection of sleeve pipe one, the other end of spring and the one end fixed connection of sleeve pipe two, the equal fixed mounting round pin axle of the other end of sleeve pipe one and the other end of sleeve pipe two, the other end of sleeve pipe one is through round pin axle and a coupling assembling swing joint, the other end of sleeve pipe two is through round pin axle and a coupling assembling swing joint, when the valve plate anticlockwise rotates, the right flank of valve plate promotes sleeve pipe two and slides and extrudees spring promotion sleeve pipe one along the length direction of connecting rod, whole coupling mechanism's length is compressed, sleeve pipe one drives the lifter plate to rise and extrude the expanded gasbag after aerifing along the length direction of spout, the gasbag produces elastic deformation and produces elasticity, elasticity can restrict the turned angle of valve plate, and then adjusts the liquid flow and the pressure of inlet port department, and when the left surface of valve plate covered the inlet port, the right flank pulling sleeve pipe two of valve plate, connecting rod, spring and sleeve pipe were elongated whole coupling mechanism in the lump, the lifter plate descends to the bottom of spout along the length direction of spout under the effect of gasbag elasticity and self gravity, the top of spout upwards is close to the through-hole on the valve body lateral wall, the spring is promoted or is kept compression state by the in-process that is pulled at sleeve pipe two, the gasbag aerifys through the air pump and adjusts the volume of self and the elasticity that produces with carminative mode, and then restricts and adjust the liquid flow and the pressure of hydraulic pressure mouth department.
The electronic device adopted by the technical scheme comprises:
the air pump and a controller and a power supply matched with the air pump;
the electronic devices are all existing products, the technical scheme of the application has no special requirements and changes on the structures of the electronic devices, and the electronic devices all belong to conventional electronic equipment;
in the implementation process of the technical scheme, all the electrical components in the scheme need to be connected with a power supply adapted to the electrical components through a lead, and a suitable controller needs to be selected according to actual conditions to meet control requirements, and specific connection and control sequence should be referred to, in the following working principle, electrical connection is completed between the electrical components in sequence, and the detailed connection means is a known technology in the art, and the following main description of the working principle and process is omitted for description of electrical control;
in the implementation process of the technical scheme, a worker uses the pneumatic air pump to fill a certain amount of air into the air bag according to needs, and the volume and the elasticity of the air bag are guaranteed to meet the use requirements. When liquid enters the valve body through the liquid inlet, the valve plate rotates anticlockwise under the pushing of the liquid, the right side face of the valve plate pushes the sleeve II to slide along the length direction of the connecting rod and push the sleeve I through the extrusion spring, the length of the whole connecting mechanism is compressed, so that enough space is provided for linkage of the whole structure, the sleeve I drives the lifting plate to ascend along the length direction of the sliding groove and extrude the inflated airbag, the airbag generates elastic deformation and generates elastic force, the elastic force can limit the rotation angle of the valve plate and simultaneously provides flexible buffering for the rotation of the valve plate, and the adjustment of the liquid flow and the pressure at the liquid inlet is completed; when liquid does not enter the valve body through the liquid inlet, the left side face of the valve plate covers the liquid inlet, the right side face of the valve plate pulls the second sleeve, the connecting rod, the spring and the sleeve to elongate the whole connecting mechanism, the spring keeps a compression state in the process and gives a thrust to the valve plate to ensure that the valve plate is tightly attached to the liquid inlet, and the lifting plate descends to the bottom end of the sliding groove along the length direction of the sliding groove under the action of the elastic force of the air bag and the self gravity.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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. The use of the phrase "comprising" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the same.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (9)
1. A flange check valve with an automatic adjusting function comprises a valve body (1), wherein a sealing cover (2) is mounted at the top end of the valve body, a valve plate (3) is arranged in an inner cavity of the valve body and is positioned at an inlet of the inner cavity of the valve body, the upper edge of the valve plate is movably connected with the inner surface of the valve body above the inlet through a rotating shaft, the size of the valve plate is matched with the size of the inlet and ensures that the left side surface of the valve plate covers the inlet, a plug body (4) is fixedly mounted on the left side surface of the valve plate and can plug the inlet, and the flange check valve is characterized in that,
the air pump is characterized in that a plurality of sliding grooves (5) are formed in an inner cavity of the valve body and are positioned on the upper portion of the inner cavity of the valve body, the sliding grooves are arranged on the inner surface of the inner cavity of the valve body from top to bottom, a lifting plate (6) is arranged in the inner cavity of the valve body and is perpendicular to the length direction of the sliding grooves, protrusions (7) are arranged on the edges of the lifting plate and are embedded into the sliding grooves and can lift along the length direction of the sliding grooves, air bags (8) are arranged in the inner cavity of the valve body and are positioned between the lifting plate and a sealing cover, through holes are formed in the side wall of the valve body and are positioned on the upper portion of the valve body and close to the sealing cover, the through holes are communicated with the inner cavity of the valve body, an air pump (9) is fixedly installed on the outer surface of the valve body, an air outlet pipe (10) of the air pump is connected with the air bags and controls the air inflation and exhaust of the air bags, and a first pin shaft connecting assembly is fixedly installed on the lower surface of the lifting plate, the right side face of valve plate fixed mounting round pin coupling assembling two, still be equipped with coupling mechanism in the valve body inner chamber, coupling mechanism's both ends respectively with round pin coupling assembling one and round pin coupling assembling two swing joint, when the valve plate is counter-clockwise rotatory under the promotion of liquid of inlet opening department, coupling mechanism can promote the lifter plate upwards to slide and extrude the gasbag.
2. The flange check valve with the automatic adjusting function according to claim 1, wherein the connecting mechanism comprises a first sleeve (11), a second sleeve (12) and a connecting rod (13), one end of the connecting rod is inserted into one end of the first sleeve, the other end of the connecting rod is inserted into one end of the second sleeve, a spring (14) is sleeved on the connecting rod, one end of the spring is fixedly connected with one end of the first sleeve, the other end of the spring is fixedly connected with one end of the second sleeve, the other end of the first sleeve and the other end of the second sleeve are fixedly provided with a pin shaft, the other end of the first sleeve is movably connected with the first connecting component through a pin shaft, and the other end of the second sleeve is movably connected with the second connecting component through a pin shaft.
3. A flange check valve with automatic regulating function, as claimed in claim 2, characterized in that, when the valve plate rotates counterclockwise, the right side of the valve plate pushes the second sleeve to slide along the length direction of the connecting rod and push the first sleeve by the compression spring, the length of the whole connecting mechanism is compressed, the first sleeve drives the lifting plate to ascend along the length direction of the chute and push the inflated airbag, the airbag generates elastic deformation and generates elastic force, the elastic force can limit the rotation angle of the valve plate, and further the liquid flow and pressure at the liquid inlet can be regulated.
4. A flange check valve with automatic regulating function according to claim 3, characterized in that, when the left side of the valve plate covers the liquid inlet, the right side of the valve plate pulls the second sleeve, the connecting rod, the spring and the sleeve to elongate the whole connecting mechanism, the lifting plate descends to the bottom end of the chute along the length direction of the chute under the action of the elastic force of the air bag and the self gravity, and the top end of the chute is upwards close to the through hole on the side wall of the valve body.
5. A flange check valve with automatic regulating function according to claim 4, characterized in that the spring keeps the compression state continuously during the process that the second sleeve is pushed or pulled, the protrusion on the edge of the lifting plate is an arc protrusion, and the cross-sectional shape of the sliding groove is matched with the arc protrusion.
6. A flange check valve with automatic regulating function according to claim 4, characterized in that the air bag adjusts its volume and generated elastic force by means of inflating and deflating the air pump, thereby limiting and regulating the liquid flow and pressure at the hydraulic pressure port.
7. A flange check valve with an automatic adjusting function according to claim 4, characterized in that the first sleeve and the second sleeve are both pipe fittings with one ends closed and the other ends open, the cross-sectional dimension of the connecting rod is matched with the inner dimensions of the first sleeve and the second sleeve, and the two ends of the connecting rod are ensured to form interference fit when being respectively inserted into the open ends of the first sleeve and the second sleeve.
8. The flange check valve with the automatic adjusting function of claim 7, wherein the first sleeve and the second sleeve are both round pipes, the connecting rod is a round rod, and the sum of the length of the first sleeve, the length of the second sleeve and the length of the connecting rod is greater than the distance between the first pin shaft connecting assembly and the second pin shaft connecting assembly.
9. The flange check valve with the automatic adjusting function according to claim 8, wherein the first pin connecting assembly and the second pin connecting assembly are both formed by two connecting pieces (15), the two connecting pieces are parallel to each other, the two connecting pieces are provided with pin shaft holes, and both ends of the pin shaft can be respectively inserted into the pin shaft holes of the two connecting pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210791161.1A CN114935027A (en) | 2022-07-07 | 2022-07-07 | Flange check valve with automatic regulating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210791161.1A CN114935027A (en) | 2022-07-07 | 2022-07-07 | Flange check valve with automatic regulating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114935027A true CN114935027A (en) | 2022-08-23 |
Family
ID=82868141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210791161.1A Withdrawn CN114935027A (en) | 2022-07-07 | 2022-07-07 | Flange check valve with automatic regulating function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114935027A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117537203A (en) * | 2024-01-10 | 2024-02-09 | 威海拓力莱纤维有限公司 | Sealing connecting piece for carbon fiber composite material pipeline |
-
2022
- 2022-07-07 CN CN202210791161.1A patent/CN114935027A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117537203A (en) * | 2024-01-10 | 2024-02-09 | 威海拓力莱纤维有限公司 | Sealing connecting piece for carbon fiber composite material pipeline |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220823 |
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| WW01 | Invention patent application withdrawn after publication |