CN209743635U - Gate valve - Google Patents
Gate valve Download PDFInfo
- Publication number
- CN209743635U CN209743635U CN201920436005.7U CN201920436005U CN209743635U CN 209743635 U CN209743635 U CN 209743635U CN 201920436005 U CN201920436005 U CN 201920436005U CN 209743635 U CN209743635 U CN 209743635U
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- China
- Prior art keywords
- valve
- ceramic
- ring
- gate
- flashboard
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- Expired - Fee Related
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Abstract
The utility model discloses a gate valve relates to the valve field. The ceramic valve comprises a valve body, a fluid passage is formed in the valve body, a valve rod is arranged in the valve body, a flashboard is arranged under the valve rod, an opening and closing hole is formed in the flashboard, the ceramic valve seat is arranged at the inlet end of the fluid passage, a first passage communicated with the fluid passage is formed in the ceramic valve seat, one side, away from the inlet end of the fluid passage, of the ceramic valve seat is attached to the side wall of the flashboard, a ceramic sealing ring is detachably connected to one side, away from the flashboard, of the ceramic sealing ring, a valve cover pressing plate is arranged, a second passage communicated with the first passage is formed in the valve cover pressing plate. The utility model has the advantages of dismantle conveniently, can solve the dead phenomenon of flashboard card, overhaul convenient, avoid extravagant.
Description
Technical Field
The utility model relates to a valve field, more specifically says, it relates to a gate valve.
background
The gate valve is a shutter plate, which moves in a direction perpendicular to the direction of flow, and is typically sealed by contact of a valve seat with the plate. The gate valve can only perform the functions of full opening and full closing, but can not perform the functions of adjustment and throttling.
The utility model discloses a gate valve is disclosed in chinese utility model patent that bulletin number is CN205745391U, including valve body and valve rod, be equipped with the flashboard in the valve body, be equipped with the valve gap on the valve body, be connected with the support frame on the valve gap, the top of support frame is equipped with the boss, valve rod threaded connection passes the valve gap and rotates to be connected in the flashboard top in the boss, the one end that the flashboard was kept away from to the valve rod is connected with the hand wheel, the upper end swivelling joint who lies in the support frame on the valve rod has the limiting plate that can reciprocate along with the valve rod, one side downwardly extending of limiting plate has spacing post, spacing post is equipped with spacing logical groove towards one side of valve rod, spacing logical groove is arranged along the direction of height of support frame.
The above prior art solutions have the following drawbacks: the contact surface between the gate plate and the valve body is not improved in the gate valve, and the conventional gate valve generally seals the gate plate and the valve body by contacting each other. In the process gate valve that fluid passed through, because can have some tiny hard particles in the fluid, hard particle piles up easily at flashboard and valve body handing-over department, and at the in-process along with the flashboard rises and descends, hard particle is easy to be gone into between the contact surface of flashboard and valve body, causes the flashboard card to die, and the manual work can't rise the flashboard or descend, and whole gate valve can only scrap the processing, causes the waste.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a gate valve, it has dismantle convenient, can solve the dead phenomenon of flashboard card, overhaul convenient, avoid extravagant advantage.
In order to achieve the above purpose, the utility model provides a following technical scheme:
The utility model provides a gate valve, includes the valve body, fluid passage has been seted up in the valve body, be provided with the valve rod in the valve body, be provided with the flashboard under the valve rod, seted up on the flashboard and opened the obturator, fluid passage's entrance point is provided with ceramic disk seat, set up the first passageway that is linked together with fluid passage on the ceramic disk seat, one side and the laminating of flashboard lateral wall that fluid passage entrance point was kept away from to ceramic disk seat, the one side that ceramic disk seat was kept away from to the flashboard can be dismantled and be connected with ceramic seal, one side that ceramic seal kept away from the flashboard is provided with the valve gap clamp plate, set up the second passageway that is linked together with first.
By adopting the technical scheme, when the hard particles are clamped into the contact surface between the flashboard and the ceramic sealing ring, a worker can firstly disassemble the valve cover pressing plate, then disassemble the ceramic sealing ring and clear the hard particles on the side wall of the flashboard or the ceramic sealing ring; if hard particle card is in the contact surface between flashboard and the ceramic disk seat, repeat above-mentioned operation, because a lateral wall that ceramic disk seat was kept away from to the flashboard is not atress this moment, can produce the gap between flashboard and the ceramic disk seat, orders about the flashboard and patt ceramic disk seat, hard particle can follow the contact surface of the two and fall down, solves the dead phenomenon of flashboard card, installs ceramic seal circle and valve gap clamp plate in proper order afterwards and can continue to use the gate valve, convenient the maintenance avoids extravagant.
Furthermore, an O-shaped ring in a compressed state is arranged between the valve cover pressing plate and the ceramic sealing ring.
By adopting the technical scheme, when the O-shaped ring is in a compressed state, pretightening force is applied to the valve cover pressing plate and the ceramic sealing ring, the ceramic sealing ring can tightly abut against the flashboard after receiving the pretightening force, and the flashboard is firmly abutted against the ceramic valve seat, so that the sealing performance is improved; simultaneously, along with the increase of flashboard number of times of opening and close, wearing and tearing take place easily in the contact surface between flashboard and the ceramic seal circle, the O shape circle can be timely at this moment supports the ceramic seal circle tight flashboard, improves the self-healing ability of flashboard both sides contact surface, guarantees sealing performance, increase of service life.
Further, the valve gap clamp plate is that the echelonment is protruding in proper order towards ceramic seal ring direction and has first butt ring and second butt ring, the centre of a circle of first butt ring and second butt ring is located same water flat line and the internal diameter of first butt ring is less than the internal diameter of second butt ring, the outer wall and the laminating of second butt ring inner wall of ceramic seal ring, protruding third butt ring that has with the laminating of first butt ring inner wall of ceramic seal ring towards valve gap clamp plate direction, O shape circle is located between second butt ring and the ceramic seal ring.
through adopting above-mentioned technical scheme, ceramic seal can cup joint and fix in the second butt ring, and stability is high, and O shape circle is restricted between second butt ring inner wall and third butt ring outer wall simultaneously, and O shape circle is difficult to take place to drop this moment, improves the stability of O shape circle.
Furthermore, the cross sections of the first channel, the second channel, the fluid channel and the opening and closing hole are circular, the diameter of the first channel, the inner diameter of the ceramic sealing ring, the diameter of the opening and closing hole, the diameter of the second channel and the diameter of the fluid channel are equal, and the circle centers of the first channel, the second channel and the fluid channel are located on the same horizontal line.
By adopting the technical scheme, when the flashboard is fully opened, the first channel, the ceramic sealing ring, the opening and closing hole, the second channel and the fluid channel form a smooth channel, the flow resistance coefficient is extremely small, no pressure loss exists, and the instantaneous flow passing through the gate valve is improved; meanwhile, the worker can clean the pipeline through the pompon, and the operation is convenient.
Furthermore, a flange is arranged on one side, away from the ceramic seal ring, of the valve cover pressing plate in the direction away from the second channel, and a fastening bolt used for fastening the valve cover pressing plate to the ceramic seal ring is arranged on one side, away from the valve body, of the flange.
By adopting the technical scheme, a worker can unscrew and detach the abutting bolt, so that the valve cover pressing plate and the ceramic sealing ring are detached, and hard particles are conveniently removed; meanwhile, the working personnel can check whether the tightening bolt is in a screwing state in real time, and the maintenance is convenient; and along with the increase of flashboard number of times of opening and close, the contact surface wearing and tearing of flashboard both sides are serious, and the staff only need will support tight bolt and tighten again and can make the ceramic seal circle support the flashboard tightly once more, improves the leakproofness of gate valve, makes things convenient for staff's operation and the maintenance of gate valve.
Furthermore, the inlet end of the valve body, which is positioned on the fluid channel, protrudes towards the flashboard direction to form a sleeve ring, and the inner wall of the sleeve ring is attached to the outer wall of the ceramic valve seat.
through adopting above-mentioned technical scheme, the ceramic valve seat cup joints in cup jointing the intra-annular, only need during the installation with ceramic valve seat cup joint in cup jointing the intra-annular can, easy to assemble.
Furthermore, the one end arch that the valve rod was kept away from to the flashboard has the spacing piece that is used for avoiding the flashboard excessively to rise.
Through adopting above-mentioned technical scheme, when the valve rod drives the flashboard and rises to being about to break away from with ceramic seal, spacing piece can be blockked by ceramic base or cup joint ring, and the flashboard can't continue to rise, avoids leading to the gate valve to open once more because of the flashboard excessively rises, plays limiting displacement.
Furthermore, the limiting sheet is located on one side, away from the ceramic valve seat, of the flashboard.
By adopting the technical scheme, if the limiting piece is positioned on one side of the flashboard close to the ceramic valve seat, the limiting piece is clamped by the sleeving ring and is difficult to install when the limiting piece slides from top to bottom for installation; and will spacing piece setting be kept away from ceramic valve seat's one side at the flashboard, before installing ceramic seal and valve gap clamp plate, ceramic valve seat's one side is kept away from to the flashboard does not have the obstacle, and the flashboard can descend to ceramic valve seat below with spacing piece, installs the installation that ceramic seal and valve gap clamp plate can accomplish whole gate valve afterwards again, and the installation is very convenient.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) By arranging the ceramic valve seat, the ceramic sealing ring and the valve cover pressing plate, and arranging the ceramic sealing ring and the valve cover pressing plate to be detachable, when the hard particles are clamped into a contact surface between the flashboard and the ceramic sealing ring or a contact surface between the flashboard and the ceramic valve seat, a worker can detach the ceramic sealing ring and the valve cover pressing plate to remove the hard particles, and then the ceramic sealing ring and the valve cover pressing plate are sequentially installed to continue to use the gate valve, so that the maintenance is convenient, and the waste is avoided;
(2) The O-shaped ring in a compressed state is arranged between the ceramic sealing ring and the valve cover pressing plate, the O-shaped ring can apply pretightening force to the valve cover pressing plate and the ceramic sealing ring, the ceramic sealing ring can tightly support the flashboard after receiving the pretightening force, and the flashboard is firmly supported on the ceramic valve seat, so that the self-repairing capability of the contact surfaces at the two sides of the flashboard is improved, the sealing performance is ensured, and the service life is prolonged;
(3) Through setting up spacing piece, avoid the flashboard excessively to rise and lead to the gate valve to open, play limiting displacement.
Drawings
FIG. 1 is a schematic sectional view of the present embodiment;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is an enlarged schematic view of a portion B in fig. 1.
Reference numerals: 1. a valve body; 2. a fluid channel; 201. an inlet end; 202. an outlet end; 3. a valve stem; 4. a shutter plate; 5. opening and closing the hole; 6. a ceramic valve seat; 7. a first channel; 8. a ceramic seal ring; 9. a valve cover pressing plate; 10. a second channel; 11. an O-shaped ring; 12. a first abutment ring; 13. a second abutment ring; 14. a third abutment ring; 15. a flange; 16. tightly abutting against the bolt; 17. a sleeving connection ring; 18. a limiting sheet; 19. a valve cover top plate; 20. an oil cylinder; 21. a rubber plug; 22. a piston rod; 23. and (4) a distance measuring sleeve.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1 and 2, the gate valve includes a valve body 1, a fluid channel 2 is horizontally disposed in the valve body 1, and a cross section of the fluid channel 2 is circular. The fluid channel 2 comprises an inlet end 201 and an outlet end 202, a circular socket ring 17 protrudes from one side of the valve body 1, which is located at the inlet end 201 of the fluid channel 2 and is far away from the outlet end 202, the circle center of the socket ring 17 and the circle center of the cross section of the fluid channel 2 are located on the same horizontal line, and meanwhile, the inner diameter of the socket ring 17 is larger than the diameter of the fluid channel 2.
A valve cover top plate 19 is horizontally fixed at the top of the valve body 1 through a bolt, a valve rod 3 is vertically arranged in the valve body 1, the top end of the valve rod 3 protrudes out of the valve cover top plate 19, an oil cylinder 20 is arranged at the protruding end, the oil cylinder 20 is fixed on the valve cover top plate 19 through a bolt, and the telescopic shaft of the oil cylinder 20 is the valve rod 3. A rubber plug 21 is slidably connected in the oil cylinder 20, a piston rod 22 is fixedly connected at one end of the rubber plug 21 far away from the valve rod 3, and the piston rod 22 penetrates out of the oil cylinder 20 and is slidably connected with the oil cylinder. The oil cylinder 20 is located on the periphery of the piston rod 22 and is fixedly provided with a transparent distance measuring sleeve 23 through bolts, the piston rod 22 is sleeved in the distance measuring sleeve 23, a steel ruler (not shown in the figure) is vertically adhered to the outer wall of the distance measuring sleeve 23, when the piston rod 22 ascends and descends, a worker can confirm the ascending and descending scale of the piston rod 22 through the steel ruler, and the valve rod 3 is prevented from excessively ascending or descending.
The end of the valve rod 3 far away from the oil cylinder 20 is vertically fixed with a shutter plate 4, and the shutter plate 4 is positioned on the side of the inlet end 201 far away from the outlet end 202 of the fluid passage 2. The flashboard 4 is provided with an opening and closing hole 5 with a circular cross section, the diameter of the opening and closing hole 5 is equal to that of the fluid channel 2, and the circle centers of the opening and closing hole 5 and the fluid channel are positioned on the same horizontal line.
The one end arch that the valve rod 3 was kept away from to flashboard 4 has curved spacing piece 18, and spacing piece 18 is the arc and its crest is kept away from valve rod 3. A cylindrical ceramic valve seat 6 is arranged between the inlet end 201 of the fluid passage 2 and the shutter plate 4, and the limiting piece 18 is positioned on one side of the shutter plate 4 far away from the ceramic valve seat 6. The peripheral side of the ceramic valve seat 6 is sleeved in the sleeving ring 17, and one end, far away from the fluid channel 2, of the ceramic valve seat 6 protrudes out of the sleeving ring 17 and is attached to the side wall of the flashboard 4.
The ceramic valve seat 6 is horizontally provided with a first channel 7, two ends of the first channel 7 are respectively communicated with the opening and closing hole 5 and the inlet end 201 of the fluid channel 2, the cross section of the first channel 7 is circular, the diameter of the first channel 7 is equal to that of the opening and closing hole 5, and the circle centers of the first channel 7 and the opening and closing hole 5 are located on the same horizontal line.
One side of the flashboard 4 far away from the ceramic valve seat 6 is provided with a circular ceramic sealing ring 8, the inner diameter of the ceramic sealing ring 8 is equal to the diameter of the opening and closing hole 5, and the circle centers of the two are all located on the same horizontal line. The protruding third butt ring 14 that has of one side that ceramic seal 8 kept away from flashboard 4, the internal diameter of third butt ring 14 equals with ceramic seal 8's internal diameter, and the external diameter of third butt ring 14 is less than ceramic seal 8's external diameter.
One side of the ceramic seal ring 8, which is far away from the flashboard 4, is provided with a cylindrical valve cover pressing plate 9, a second channel 10 communicated with the opening and closing hole 5 is horizontally arranged on the valve cover pressing plate 9, the cross section of the second channel 10 is circular, the circle center of the second channel and the circle of the opening and closing hole 5 are positioned on the same horizontal line, and the diameter of the second channel 10 is equal to that of the opening and closing hole 5. When the gate plate 4 is fully opened, the first channel 7, the ceramic sealing ring 8, the opening and closing hole 5, the second channel 10 and the fluid channel 2 form a smooth channel, the flow resistance coefficient is extremely small, no pressure loss exists, and the instantaneous flow passing through the gate valve is improved.
The bonnet pressure plate 9 is sequentially provided with a first abutting ring 12 and a second abutting ring 13 in a step shape in a protruding mode towards the direction of the ceramic sealing ring 8, and a gap is formed between the second abutting ring 13 and the flashboard 4. The centers of circles of the first abutting ring 12, the second abutting ring 13 and the second channel 10 are all located on the same horizontal line, the inner diameter of the first abutting ring 12 is smaller than that of the second abutting ring 13, and the diameter of the second channel 10 is smaller than that of the first abutting ring 12. The outer wall of the ceramic seal ring 8 is attached to the inner wall of the second abutting ring 13, the outer wall of the third abutting ring 14 is attached to the inner wall of the first abutting ring 12, and one side, far away from the flashboard 4, of the third abutting ring 14 is attached to the side wall of the valve cover pressing plate 9. At this time, the third abutting ring 14 is sleeved in the first abutting ring 12, the ceramic valve seat 6 is sleeved in the second abutting ring 13, and the ceramic valve seat 6 and the third abutting ring 14 are fixed.
Ceramic seal 8 keeps away from one side of flashboard 4 and first butt ring 12 is equipped with the clearance between being close to one side of flashboard 4, be provided with the O shape circle 11 that is compression state in this clearance, O shape circle 11 can exert the pretightning force to valve gap clamp plate 9 and ceramic seal 8 directions, ceramic seal 8 can support tight flashboard 4 after receiving the pretightning force, support that stabilizes flashboard 4 tightly on ceramic valve seat 6, not only improve the self-healing ability of flashboard 4 both sides contact surface, and guarantee sealing performance, increase of service life.
Referring to fig. 2 and 3, an annular flange 15 is arranged at one end, away from the ceramic seal ring 8, of the bonnet pressure plate 9 and circumferentially protrudes around the flange, a tightening bolt 16 is arranged on one side, away from the ceramic seal ring 8, of the flange 15, one side, close to the ceramic seal ring 8, of the flange 15 is attached to the valve body 1, a tightening bolt 16 is arranged on the other side of the flange 15, and the tightening bolt 16 is sequentially screwed into the flange 15 and the valve body 1, so that the flange 15 is fixed to the valve body 1. The worker can sequentially disassemble the valve cover pressing plate 9 and the ceramic sealing ring 8, so that hard particles on two sides of the flashboard 4 can be conveniently removed; meanwhile, the worker can tightly screw the abutting bolt 16 in real time, so that the ceramic sealing ring 8 abuts against the gate plate 4 again, and the sealing performance of the gate valve is improved.
The utility model discloses a working process and beneficial effect as follows: the oil cylinder 20, the valve rod 3 and the gate plate 4 are firstly installed on the valve cover top plate 19, and then the valve cover top plate 19 is installed on the top of the valve body 1, and the valve rod 3 and the gate plate 4 penetrate into the valve body 1 at the moment. And then, the ceramic sealing ring 8, the O-shaped ring 11 and the valve cover pressing plate 9 are sequentially installed to finish the installation of the gate valve. When hard particles are clamped into the contact surface between the flashboard 4 and the ceramic sealing ring 8, a worker firstly detaches the valve cover pressing plate 9, then detaches the O-shaped ring 11 and the ceramic sealing ring 8, and brushes down the hard particles on the side wall of the flashboard 4 or the ceramic sealing ring 8; if hard granule card is in the contact surface between flashboard 4 and ceramic valve seat 6, with valve gap clamp plate 9, O shape circle 11, ceramic seal 8 pull down, this moment because a lateral wall that ceramic valve seat 6 was kept away from to flashboard 4 is not atress, can produce the gap between flashboard 4 and the ceramic valve seat 6, order about flashboard 4 and pat ceramic valve seat 6, hard granule can fall from the contact surface of the two, solve the dead phenomenon of flashboard 4 card, install ceramic seal 8 and valve gap clamp plate 9 in proper order afterwards and can continue to use the gate valve. When the contact surface between the flashboard 4 and the ceramic seal ring 8 or the contact surface between the flashboard 4 and the ceramic valve seat 6 is abraded, a worker can screw the abutting bolt 16 in real time to enable the ceramic seal ring 8 to abut against the flashboard 4, and the sealing performance between the flashboard 4 and the ceramic seal ring 8 and between the flashboard 4 and the ceramic valve seat 6 is improved; meanwhile, the O-shaped ring 11 is in a compressed state, and the ceramic sealing ring 8 can be tightly abutted against the flashboard 4 in time.
to summer up, the utility model discloses not only can dismantle, can solve the dead phenomenon of flashboard 4 card, it is convenient to overhaul moreover, avoids extravagant.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A gate valve comprises a valve body (1), a fluid passage (2) is formed in the valve body (1), a valve rod (3) is arranged in the valve body (1), a gate plate (4) is arranged under the valve rod (3), an opening and closing hole (5) is formed in the gate plate (4), the gate valve is characterized in that a ceramic valve seat (6) is arranged at an inlet end (201) of the fluid passage (2), a first passage (7) communicated with the fluid passage (2) is formed in the ceramic valve seat (6), one side, away from the inlet end (201) of the fluid passage (2), of the ceramic valve seat (6) is attached to the side wall of the gate plate (4), a ceramic sealing ring (8) is detachably connected to one side, away from the ceramic valve seat (6), of the ceramic sealing ring (8) is provided with a valve cover pressing plate (9), and a second channel (10) communicated with the first channel (7) is formed in the valve cover pressing plate (9), and the valve cover pressing plate (9) is detachably connected with the valve body (1).
2. A gate valve according to claim 1, characterised in that an O-ring (11) is arranged in compression between the valve cover pressure plate (9) and the ceramic sealing ring (8).
3. The gate valve according to claim 2, wherein the valve cover pressing plate (9) is sequentially provided with a first abutting ring (12) and a second abutting ring (13) in a stepped manner, the circle centers of the first abutting ring (12) and the second abutting ring (13) are located on the same horizontal line, the inner diameter of the first abutting ring (12) is smaller than that of the second abutting ring (13), the outer wall of the ceramic sealing ring (8) is attached to the inner wall of the second abutting ring (13), a third abutting ring (14) attached to the inner wall of the first abutting ring (12) is arranged in a protruding manner in the direction of the valve cover pressing plate (9) of the ceramic sealing ring (8), and the O-shaped ring (11) is located between the second abutting ring (13) and the ceramic sealing ring (8).
4. a gate valve according to claim 1, characterized in that the cross-section of the first channel (7), the second channel (10), the fluid channel (2) and the opening and closing hole (5) is circular, the diameter of the first channel (7), the inner diameter of the ceramic sealing ring (8), the diameter of the opening and closing hole (5), the inner diameter of the second channel (10) and the diameter of the fluid channel (2) are equal, and the centers of the circles are located on the same horizontal line.
5. A gate valve according to claim 1, wherein a flange (15) is arranged on the side of the valve cover pressing plate (9) far away from the ceramic sealing ring (8) towards the direction far away from the second channel (10), and a fastening bolt (16) for fastening the valve cover pressing plate (9) to the ceramic sealing ring (8) is arranged on the side of the flange (15) far away from the valve body (1).
6. A gate valve according to claim 5, characterized in that the inlet end (201) of the valve body (1) in the fluid passage (2) is provided with a collar (17) projecting towards the gate plate (4), the inner wall of the collar (17) abutting against the outer wall of the ceramic valve seat (6).
7. A gate valve according to claim 6, characterized in that the end of the gate plate (4) remote from the valve stem (3) is provided with a stop tab (18) protruding to prevent the gate plate (4) from rising excessively.
8. A gate valve according to claim 7, characterized in that the stop piece (18) is located on the side of the gate plate (4) facing away from the ceramic valve seat (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920436005.7U CN209743635U (en) | 2019-04-02 | 2019-04-02 | Gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920436005.7U CN209743635U (en) | 2019-04-02 | 2019-04-02 | Gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209743635U true CN209743635U (en) | 2019-12-06 |
Family
ID=68719665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920436005.7U Expired - Fee Related CN209743635U (en) | 2019-04-02 | 2019-04-02 | Gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209743635U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531136A (en) * | 2021-08-09 | 2021-10-22 | 宁波诚天液压有限公司 | One-way fine adjustment type hydraulic control throttling device |
| CN114922994A (en) * | 2022-06-30 | 2022-08-19 | 靖江佳佳精密机械科技有限公司 | Novel air-driven type sealing vacuum valve |
-
2019
- 2019-04-02 CN CN201920436005.7U patent/CN209743635U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531136A (en) * | 2021-08-09 | 2021-10-22 | 宁波诚天液压有限公司 | One-way fine adjustment type hydraulic control throttling device |
| CN114922994A (en) * | 2022-06-30 | 2022-08-19 | 靖江佳佳精密机械科技有限公司 | Novel air-driven type sealing vacuum valve |
| CN114922994B (en) * | 2022-06-30 | 2023-09-15 | 靖江佳佳精密机械科技有限公司 | Air-driven type sealing vacuum valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191206 Termination date: 20210402 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |