CN116608343A - Self-sealing quick pneumatic connector - Google Patents
Self-sealing quick pneumatic connector Download PDFInfo
- Publication number
- CN116608343A CN116608343A CN202310759982.1A CN202310759982A CN116608343A CN 116608343 A CN116608343 A CN 116608343A CN 202310759982 A CN202310759982 A CN 202310759982A CN 116608343 A CN116608343 A CN 116608343A
- Authority
- CN
- China
- Prior art keywords
- groove
- valve
- jack
- self
- joint
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 43
- 241000283216 Phocidae Species 0.000 claims abstract description 7
- 238000003780 insertion Methods 0.000 claims description 14
- 230000037431 insertion Effects 0.000 claims description 14
- 238000012856 packing Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
Classifications
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/0845—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of retaining members associated with the packing member
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
- F16L37/1235—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members the connection taking place from inside the pipes
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
- F16L37/14—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Fluid Mechanics (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The utility model provides a quick pneumatic connector of self sealss, includes male joint and female joint, and the one end that male joint and female joint all are equipped with the connecting pipe, and the other end that male joint and female joint are equipped with intubate and jack respectively, intubate and jack grafting cooperation, be equipped with annular mounting groove in the jack, fixed mounting has the elastic sealing collar in the annular mounting groove, is equipped with the inflatable gasket between annular mounting groove and the elastic sealing collar, is equipped with communicating pipe between inflatable gasket and the jack, is equipped with sealed draw-in groove on the intubate, and sealed draw-in groove carries out unsmooth sealing cooperation with the elastic sealing collar. When the pipe is used, the inflatable gasket expands under the action of air pressure in the pipe, the elastic sealing collar is pressed, reliable sealing and fixed connection are formed, and when the pipe is disassembled, air in the inflatable gasket can be discharged, so that the male connector is convenient to take down.
Description
Technical Field
The invention relates to the technical field of pneumatic connectors, in particular to a self-sealing rapid pneumatic connector.
Background
The pneumatic quick connector is mainly used for air piping and pneumatic tools. The patent document in China with the publication number of CN112228659B discloses a stable hydraulic pneumatic connector with adjustable flow, the hydraulic pneumatic connector comprises a pneumatic connector body and a connecting tail pipe, a first connecting hose is fixedly connected to one side of the vertical end of the pneumatic connector body, and a wing plate is fixedly connected to the outer surface wall of the pneumatic connector body. During the installation, insert pneumatic plug along pneumatic connector pipe wall, the stopper is along with pneumatic plug's removal upward movement, the stopper shrink, after the stopper passes through the tube head, the spring resumes deformation, drive the stopper and reset, the stopper can block in the centre of tube head and slider, when needs dismantlement, rotate the picture peg, move pneumatic plug forward, the stopper card is gone into between slider and the connection tail pipe, pull pneumatic plug backward, the stopper drives the slider and slides tube head department, the stopper upwards contracts whole pneumatic plug and can extract, and then the result of use of hydropneumatic connector has been improved. The drawbacks of the above prior art are: the length of the pneumatic plug needs to be long enough, the plug board needs to be rotated firstly during disassembly, then the pneumatic plug is pulled back rapidly after moving forward, the operation is inconvenient, the resistance is large, and the pneumatic plug is easy to wear and clamp during use. And the connecting tail pipe is movably connected with the plugboard through the damping rotating shaft, and the sealing performance of the movable connection part is not strong.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a self-sealing quick pneumatic connector which is convenient to install and disassemble and good in sealing performance.
The invention solves the technical problems by adopting the technical scheme that: the utility model provides a quick pneumatic connector of self sealss, includes male joint and female joint, and the one end that male joint and female joint all are equipped with the connecting pipe, and the other end that male joint and female joint are equipped with intubate and jack respectively, intubate and jack grafting cooperation, be equipped with annular mounting groove in the jack, fixed mounting has the elastic sealing collar in the annular mounting groove, is equipped with the inflatable gasket between annular mounting groove and the elastic sealing collar, is equipped with communicating pipe between inflatable gasket and the jack, be equipped with sealed draw-in groove on the intubate, sealed draw-in groove carries out unsmooth sealing cooperation with the elastic sealing collar.
Further perfecting, the communicating pipe is provided with a one-way valve and an adjustable relief valve, and the one-way valve and the adjustable relief valve are sequentially arranged in the direction from the jack to the inflatable gasket.
Further perfecting, the reversing valve is arranged outside the one-way valve and comprises a valve rod and a valve core, and the one-way valve is fixedly arranged on the valve core.
Further perfecting, the valve core is fixedly provided with a valve mouth, and the valve mouth is arranged at the downstream pointed by the one-way valve.
Further perfects, be equipped with the helping hand spring in the jack, the one end fixed connection female joint of helping hand spring, the other end fixed mounting of helping hand spring has the clamping ring, and the clamping ring is located between helping hand spring and the intubate.
Further perfecting, be equipped with annular draw-in groove on the lateral wall of clamping ring, be equipped with the concertina type hole on the inner wall of jack, slidable mounting has the elasticity trip on the concertina type hole, the inner and the annular draw-in groove assorted of elasticity trip, be equipped with the tripping device that is used for driving the elasticity trip to go up and down and reset on the female joint.
The tripping mechanism comprises a driving ring rotatably arranged on the female connector, an inclined guide groove is arranged on the driving ring, the inclined guide groove is in sliding connection with the outer end of the elastic clamping hook, and a reset spring is arranged between the inclined guide groove or the telescopic hole and the outer end of the elastic clamping hook.
Further perfecting, one side of the inclined guide groove is provided with a bouncing avoiding groove, and the bouncing avoiding groove is positioned in the telescopic direction of the elastic clamping hook.
The beneficial effects of the invention are as follows: the pneumatic connector is convenient to install and detach, the insertion pipe of the male connector is inserted into the insertion hole of the female connector, the elastic sealing clamping ring can be clamped into the sealing clamping groove to form sealing after being unfolded, the inflatable gasket is inflated under the action of air pressure in the pipe to compress the elastic sealing clamping ring to form reliable sealing and fixed connection when being detached, and gas in the inflatable gasket can be discharged to facilitate the removal of the male connector.
Drawings
Fig. 1 is a schematic structural view of embodiment 1;
fig. 2 is a schematic structural view of embodiment 2;
FIG. 3 is a schematic view of the first state structure of the embodiment 3;
fig. 4 is a second state structure diagram of embodiment 3;
fig. 5 is a schematic structural view of embodiment 4;
fig. 6 is a schematic structural view of a trip mechanism in embodiment 4;
reference numerals illustrate: 1. the device comprises a male connector, 2, a female connector, 3, a connecting pipe, 4, a cannula, 5, an inserting hole, 6, an annular mounting groove, 7, an elastic sealing collar, 8, an inflatable gasket, 9, a communicating pipe, 10, a sealing clamping groove, 11, a one-way valve, 12, an adjustable relief valve, 13, a reversing valve, 14, a valve rod, 15, a valve core, 16, a valve mouth, 17, a booster spring, 18, a compression ring, 19, an annular clamping groove, 20, a telescopic hole, 21, an elastic clamping hook, 22, a driving ring, 23, an inclined guide groove, 24, a reset spring, 25 and a bouncing avoidance groove.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
referring to fig. 1: the quick pneumatic connector of self sealss in this embodiment 1, including public joint 1 and female joint 2, the one end that public joint 1 and female joint 2 all are equipped with connecting pipe 3, and the other end that public joint 1 and female joint 2 are equipped with intubate 4 and jack 5 respectively, intubate 4 and jack 5 grafting cooperation, be equipped with annular mounting groove 6 in the jack 5, fixed mounting has elastic sealing collar 7 in the annular mounting groove 6, is equipped with between annular mounting groove 6 and the elastic sealing collar 7 and aerifys packing ring 8, is equipped with communicating pipe 9 between aerifys packing ring 8 and the jack 5, be equipped with sealed draw-in groove 10 on the intubate 4, sealed draw-in groove 10 carries out unsmooth sealing cooperation with elastic sealing collar 7.
Working principle: during installation, the insertion pipe 4 of the male connector 1 is inserted into the insertion hole 5 of the female connector 2, the elastic sealing collar 7 can be clamped into the sealing clamping groove 10 to form sealing after being spread by the insertion pipe 4, and during use, the two connecting pipes 3 are respectively connected with a pneumatic tool (such as a pneumatic motor) and a pneumatic control system, and the pneumatic control system inputs high-pressure gas into the pneumatic tool through the male connector 1 and the female connector 2 to drive the pneumatic tool to work. The gas can flow into the inflatable gasket 8 through the communicating pipe 9, the inflatable gasket 8 expands under the action of air pressure in the pipe, the elastic sealing collar 7 is compressed, reliable sealing and fixed connection are formed, when the pneumatic control system is closed, the pressure in the jack 5 is recovered to be normal, and when the male connector 1 is pulled out, the gas in the inflatable gasket 8 can be discharged into the jack 5, so that the elastic sealing collar 7 is easy to expand outwards to elastically deform, and the male connector 1 is convenient to take down.
In embodiment 2, as shown in fig. 2, on the basis of embodiment 1, a check valve 11 and an adjustable relief valve 12 are installed on the communicating pipe 9, and the check valve 11 and the adjustable relief valve 12 are sequentially disposed in the direction from the jack 5 to the inflatable gasket 8. The internal gas of the jack 5 can be filled into the inflatable gasket 8 through the one-way valve 11 and plays a role in preventing diversion, the adjustable pressure release valve 12 can play a role in safely releasing pressure, the pipeline is protected, the unloading pressure value can be set by rotating a knob on the adjustable pressure release valve 12, and the inflatable gasket 8 is controlled to release air, so that the inflatable gasket is convenient to detach and set a proper sealing pressure.
In embodiment 3, as shown in fig. 3-4, on the basis of embodiment 2, a reversing valve 13 is disposed outside the unidirectional valve 11, the reversing valve 13 includes a valve rod 14 and a valve core 15, and the unidirectional valve 11 is fixedly mounted on the valve core 15. The valve rod 14 can rotate the valve core 15 by 180 degrees, so that the flow direction of the one-way valve 11 is changed, the air inflation of the air inflation gasket 8 is stopped, and the noise or the service life reduction caused by frequent air leakage of the adjustable pressure release valve 12 is avoided.
The valve core 15 is also fixedly provided with a valve 16, and the valve 16 is arranged at the downstream pointed by the one-way valve 11. The valve 16 has the functions of blocking and inflating and deflating. The one-way valve 11 is directed to the inflatable gasket 8, and the inflatable gasket 8 can be actively inflated and deflated through the valve 16. When the one-way valve 11 is directed towards the receptacle 5, the pressure in the pipe can be released by opening the valve 16 or used to charge the pipe with some gas.
In embodiment 3, as shown in fig. 5, on the basis of embodiment 1 or 2, a booster spring 17 is disposed in the insertion hole 5, one end of the booster spring 17 is fixedly connected with the female connector 2, the other end of the booster spring 17 is fixedly provided with a compression ring 18, and the compression ring 18 is located between the booster spring 17 and the insertion tube 4. After the insertion tube 4 is inserted into the insertion hole 5, the insertion tube 4 compresses the booster spring 17 through the compression ring 18, and when the insertion tube 4 is pulled out, the booster spring 17 stretches to help the insertion tube 4 to pop out, so that the joint is detached more labor-saving.
The side wall of the compression ring 18 is provided with an annular clamping groove 19, the inner wall of the jack 5 is provided with a telescopic hole 20, an elastic clamping hook 21 is slidably arranged on the telescopic hole 20, the inner end of the elastic clamping hook 21 is matched with the annular clamping groove 19, and the female connector 2 is provided with a tripping mechanism for driving the elastic clamping hook 21 to lift and reset. When the compression ring 18 is pushed into the jack 5, the elastic clamping hooks 21 are buckled into the annular clamping grooves 19 to form buckles, so that the compression of the booster spring 17 is kept, and the risk of joint falling is reduced. When the connector needs to be disassembled, the elastic clamping hooks 21 can be separated from the annular clamping grooves 19 through the tripping mechanism, so that the elastic potential energy of the booster spring 17 is released, and the disassembly is completed in an auxiliary manner.
As shown in fig. 6, the trip mechanism includes a driving ring 22 rotatably mounted on the female connector 2, an inclined guide groove 23 is disposed on the driving ring 22, the inclined guide groove 23 is slidably connected with the outer end of the elastic hook 21, and a return spring 24 is disposed between the inclined guide groove 23 or the telescopic hole 20 and the outer end of the elastic hook 21. When the driving ring 22 rotates, the inclined guide groove 23 drives the elastic clamping hook 21 to lift up, the elastic clamping hook 21 is separated from the annular clamping groove 19, and the driving ring 22 and the elastic clamping hook 21 automatically reset under the action of the reset spring 24 after the hand is loosened. One side of the inclined guide groove 23 is provided with a bouncing avoidance groove 25, and the bouncing avoidance groove 25 is positioned in the telescopic direction of the elastic clamping hook 21, so that the pressing ring 18 can not drive the driving ring 22 to rotate when pushing the elastic clamping hook 21 to lift, and the resistance during installation is reduced. The compression ring 18 can be further provided with a positioning guide sleeve which is in plug-in fit with the inner hole of the insertion tube 4, so that the sealing performance during installation is further improved.
While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the invention.
Claims (8)
1. The utility model provides a quick pneumatic joint of self sealss, includes male joint (1) and female joint (2), and the one end of male joint (1) and female joint (2) all is equipped with connecting pipe (3), and the other end of male joint (1) and female joint (2) is equipped with intubate (4) and jack (5) respectively, and intubate (4) and jack (5) are pegged graft and are cooperated, its characterized in that: be equipped with annular mounting groove (6) in jack (5), annular mounting groove (6) internal fixation has elastic seal collar (7), is equipped with between annular mounting groove (6) and elastic seal collar (7) and aerifys packing ring (8), is equipped with communicating pipe (9) between packing ring (8) and jack (5), be equipped with sealed draw-in groove (10) on intubate (4), sealed draw-in groove (10) carry out unsmooth sealing fit with elastic seal collar (7).
2. A self-sealing quick acting pneumatic fitting as claimed in claim 1 wherein: the one-way valve (11) and the adjustable pressure release valve (12) are arranged on the communicating pipe (9), and the one-way valve (11) and the adjustable pressure release valve (12) are sequentially arranged in the direction from the jack (5) to the inflatable gasket (8).
3. A self-sealing quick pneumatic connector as claimed in claim 2, wherein: the outside of check valve (11) is equipped with switching-over valve (13), and switching-over valve (13) are including valve rod (14) and case (15), fixed mounting check valve (11) on case (15).
4. A self-sealing quick acting pneumatic fitting as claimed in claim 3 wherein: and the valve core (15) is fixedly provided with a valve mouth (16), and the valve mouth (16) is arranged at the downstream pointed by the one-way valve (11).
5. A self-sealing quick acting pneumatic fitting as claimed in claim 1 wherein: be equipped with helping hand spring (17) in jack (5), the one end fixed connection female joint (2) of helping hand spring (17), the other end fixed mounting of helping hand spring (17) has clamping ring (18), and clamping ring (18) are located between helping hand spring (17) and intubate (4).
6. A self-sealing quick acting pneumatic fitting as defined in claim 5 wherein: the clamping ring is characterized in that an annular clamping groove (19) is formed in the side wall of the clamping ring (18), a telescopic hole (20) is formed in the inner wall of the insertion hole (5), an elastic clamping hook (21) is slidably mounted on the telescopic hole (20), the inner end of the elastic clamping hook (21) is matched with the annular clamping groove (19), and a tripping mechanism for driving the elastic clamping hook (21) to lift and reset is arranged on the female connector (2).
7. A self-sealing quick acting pneumatic fitting as defined in claim 6 wherein: the tripping mechanism comprises a driving ring (22) rotatably arranged on the female connector (2), an inclined guide groove (23) is arranged on the driving ring (22), the inclined guide groove (23) is slidably connected with the outer end of the elastic clamping hook (21), and a reset spring (24) is arranged between the inclined guide groove (23) or the telescopic hole (20) and the outer end of the elastic clamping hook (21).
8. A self-sealing quick acting pneumatic fitting as defined in claim 7 wherein: one side of the inclined guide groove (23) is provided with a bouncing avoidance groove (25), and the bouncing avoidance groove (25) is positioned in the telescopic direction of the elastic clamping hook (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310759982.1A CN116608343A (en) | 2023-06-26 | 2023-06-26 | Self-sealing quick pneumatic connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310759982.1A CN116608343A (en) | 2023-06-26 | 2023-06-26 | Self-sealing quick pneumatic connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116608343A true CN116608343A (en) | 2023-08-18 |
Family
ID=87680202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310759982.1A Pending CN116608343A (en) | 2023-06-26 | 2023-06-26 | Self-sealing quick pneumatic connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116608343A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117432825A (en) * | 2023-12-19 | 2024-01-23 | 福建耐源阀门有限公司 | Soft sealing gate valve |
-
2023
- 2023-06-26 CN CN202310759982.1A patent/CN116608343A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117432825A (en) * | 2023-12-19 | 2024-01-23 | 福建耐源阀门有限公司 | Soft sealing gate valve |
| CN117432825B (en) * | 2023-12-19 | 2024-03-12 | 福建耐源阀门有限公司 | Soft sealing gate valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116608343A (en) | Self-sealing quick pneumatic connector | |
| CN212053793U (en) | Automatic plugging device suitable for assembled structural steel bar sleeve grouting hole | |
| EP0441560A3 (en) | Wound evacuator | |
| US6263896B1 (en) | Pressure flow stop | |
| CN113309213A (en) | Quick plugging device for sewage pipeline | |
| CN107623218A (en) | A kind of quick replacement manually connector | |
| CN110657314A (en) | Water plugging equipment for maintaining water supply pipeline | |
| CN2453211Y (en) | Quich actioun joint for fuel gas pipe | |
| CN210088240U (en) | Automatic inflating gun | |
| EP2770207A1 (en) | Automatic-switch nozzle head having two valve mouths and single-mouth nozzle head | |
| CN217712894U (en) | Pressure limiting valve for inflator | |
| TWI665401B (en) | Gas nozzle connector with automatic air-stop structure | |
| CN210687464U (en) | Pipeline leakage stopper | |
| CN209705498U (en) | A kind of quickly jointed tubular workpieces with check device | |
| CN205859442U (en) | Rotating clamp claw valve | |
| CN111946389A (en) | Coal mine mining area gas extraction device and method | |
| CN219755723U (en) | Water pipe plugging device for water pump maintenance | |
| CN215053589U (en) | Air inlet valve of pipeline dredging device | |
| CN219587602U (en) | Mining inflation gas-stamping device | |
| CN219712706U (en) | UV pipeline repair seal assembly | |
| CN212959001U (en) | Portable energy-saving inflator pump | |
| CN218934664U (en) | Air pump inflating assembly for bionic midwifery instrument | |
| CN214129869U (en) | Novel balloon catheter | |
| CN219042572U (en) | Inflatable air bag for lumbar support | |
| CN211009335U (en) | One-way hydraulic lock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |