CN117386875B - Valve rod locking device for oil drain valve - Google Patents
Valve rod locking device for oil drain valve Download PDFInfo
- Publication number
- CN117386875B CN117386875B CN202311674039.7A CN202311674039A CN117386875B CN 117386875 B CN117386875 B CN 117386875B CN 202311674039 A CN202311674039 A CN 202311674039A CN 117386875 B CN117386875 B CN 117386875B
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- lock box
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- inner sides
- movable
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- 230000006698 induction Effects 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims 2
- 238000003780 insertion Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 244000309464 bull Species 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000012634 fragment Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005096 rolling process 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K35/00—Means to prevent accidental or unauthorised actuation
- F16K35/10—Means to prevent accidental or unauthorised actuation with locking caps or locking bars
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to the technical field of valve lock relatives, in particular to a valve rod locking device for an oil drain valve, which comprises an upper lock box and a lower lock box, wherein the inner sides of the upper lock box and the lower lock box are respectively provided with an arc-shaped groove, the two arc-shaped grooves are spliced into round holes, a magnetic attraction pushing assembly is arranged above the inner side of the upper lock box, the upper surface of the diagonal corner of the lower lock box is respectively provided with a pin rod, a casing is fixedly arranged on the upper surface of the upper lock box, a magnetic attraction seat is fixedly arranged inside the casing, a jack is arranged inside the magnetic attraction seat, and a driving part is arranged above the inner side of the jack.
Description
Technical Field
The invention relates to the technical field of valve locks, and particularly provides a valve rod locking device for an oil drain valve.
Background
The oil drain valve utilizes the vacuum suction force formed by external equipment to drain used lubricating oil in various engines, wave boxes, differentials and other equipment, is called as the oil drain valve for short, and is mainly fixed by adopting a locking bolt and a locking nut when a valve rod is locked, but the step is complicated to operate, the locking effect is mechanical, and the later disassembly is not convenient enough, so that the problems are improved.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a valve rod locking device for an oil drain valve.
In order to achieve the above purpose, the invention provides a valve rod locking device for an oil drain valve, which comprises an upper lock box and a lower lock box, wherein arc grooves are formed in the inner sides of the upper lock box and the lower lock box, the two arc grooves are spliced into round holes, a magnetic attraction pushing assembly is arranged above the inner side of the upper lock box, pin rods are arranged on the upper surface of the diagonal corner of the lower lock box, a casing is fixedly arranged on the upper surface of the upper lock box, a magnetic attraction seat is fixedly arranged on the inner side of the casing, a jack is formed in the inner side of the magnetic attraction seat, and a driving piece is arranged above the inner side of the jack.
Preferably, the magnetic attraction pushing assembly comprises a mounting seat arranged above the inner side of the locking box, an inner cavity is formed in the inner side of the mounting seat, an electromagnetic shell is fixedly connected to the top wall of the diagonal corner of the mounting seat, inserting rods are slidably arranged below the inner side of the electromagnetic shell, elastic sleeves are fixedly arranged at the bottoms of the inserting rods, and rotating elastic clamping pieces are arranged inside one sides of the inserting rods close to each other.
Preferably, the rotation elasticity clamping piece is including the U-shaped seat of equal fixed mounting in the inboard lower extreme of inserted bar, the inboard fixed mounting of U-shaped seat has the inserted bar, the change cover is installed in the rotation of inserted bar outside, change cover outside below fixedly connected with movable rod, the spout has been seted up to the inboard diapire of movable rod, the inboard sliding connection of spout has the shell fragment, shell fragment upper end fixedly connected with fixture block, the fixture block slides inboard at the movable rod, the shell fragment appearance is V-arrangement setting, the movable rod bottom is provided with the connecting seat, the rubber pole has all been extended at the connecting seat both ends, two the rubber pole is connected with the hack lever inner wall that corresponds, the movable rod bottom is provided with the elastic component.
Preferably, the elastic piece comprises a fixed rod fixedly installed in the middle of the bottom of the movable rod, a connecting shaft is rotatably installed on the inner side of the fixed rod, movable sleeves are sleeved on the outer sides of two ends of the connecting shaft, tension springs are arranged above the outer sides of the two groups of movable sleeves, and the upper ends of the tension springs are fixedly installed at the bottom of the movable rod.
Preferably, the equal fixedly connected with hack lever in connecting axle both ends outside, two the bull stick is installed in the equal rotation of hack lever one end inboard, the ball is equipped with to the cover in the middle of the bull stick outside, ball and round pin pole surface movable contact, the draw-in groove has been seted up to the inboard movable rod department that corresponds of round pin pole, the both sides border that the fixture block is close to the draw-in groove all is provided with the oblique angle, the fixture block activity clamps in the inboard of draw-in groove.
Preferably, the driving piece comprises an induction lock head movably clamped at the inner side of the jack, an electromagnetic seat is arranged above the outer side of the induction lock head in a communicating manner, and control lamps are arranged at two ends of the electromagnetic seat.
Preferably, the outer walls of both sides of the locking box and the lower locking box are fixedly provided with fixing buckles, and a clamping sleeve is sleeved outside the fixing buckles corresponding to the outer sides of the locking boxes in a rotating mode.
Preferably, the cutting ferrule becomes oval setting, just cutting ferrule bottom extends has the buckle, the movable clamping of buckle is in the fixed knot outside of lower lock box outside below.
Compared with the prior art, the invention has the following beneficial effects:
after the inner side of the upper lock box is provided with an electromagnetic shell and an inserted bar, the corresponding inserted bar can be driven to move downwards through the induction lock head, the electromagnetic seat and the magnetic attraction seat which are arranged in sequence, so that the inserted bar drives the movable bar at the outer side to move downwards, the ball at the lower end of the movable bar can be abutted against the upper surface of the pin bar on the lower lock box in the slow downward moving process, the corresponding ball is automatically rolled downwards at the inclined surface of the upper end of the pin bar under the pulling of the tension spring, then the vertical rolling is carried out on the outer surface of the pin bar in the downward moving process, the clamping block can be automatically abutted against the outer surface of the pin bar along with the ball abutting direction, the middle of the movable bar is abutted against, one end of the clamping block is slidably abutted against the outer surface of the pin bar through the inclined surface, the clamping block is enabled to move to the clamping groove position, the clamping block can be abutted against the extrusion force of the elastic sheet, the reaction force is released, and the clamping block is clamped to the clamping groove, so that the upper lock box and the lower lock box are self-locked.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram illustrating the overall structure of the present invention;
FIG. 3 is a cross-sectional view showing the internal structure of the locking box of the present invention;
FIG. 4 is a schematic view of the structure of the connecting part between the insert rod and the pin rod according to the present invention;
FIG. 5 is a schematic view of the outside structure of the movable rod of the present invention;
FIG. 6 is a schematic view of the connection between the ball and the movable rod according to the present invention;
fig. 7 is an enlarged view of fig. 3 a in accordance with the present invention.
In the figure: 1. locking the box; 2. a lock box is locked down; 3. an arc-shaped groove; 4. a fixing buckle; 5. a cutting sleeve; 6. a buckle; 7. a casing; 8. a magnetic suction seat; 9. an electromagnetic seat; 10. controlling the lamp; 11. sensing a lock head; 12. a pin rod; 13. an electromagnetic shell; 14. a mounting base; 15. a rod; 16. an inner cavity; 17. a U-shaped seat; 18. a rotating sleeve; 19. inserting a shaft; 20. a movable rod; 21. a clamping groove; 22. a clamping block; 23. a spring plate; 24. a hack lever; 25. a ball; 26. a movable sleeve; 27. a fixed rod; 28. a tension spring; 29. a connecting shaft; 30. a connecting seat; 31. a chute; 32. an elastic sleeve; 33. a rotating rod; 34. a rubber rod.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the present invention is not limited to the specific embodiments disclosed below.
The valve rod locking device for the oil drain valve comprises an upper lock box 1 and a lower lock box 2, wherein arc grooves 3 are formed in the inner sides of the upper lock box 1 and the lower lock box 2, the two arc grooves 3 are spliced into round holes, a magnetic attraction pushing assembly is arranged above the inner side of the upper lock box 1, a pin rod 12 is arranged on the diagonally opposite upper surface of the lower lock box 2, a casing 7 is fixedly arranged on the upper surface of the upper lock box 1, a magnetic attraction seat 8 is fixedly arranged inside the casing 7, a jack is formed in the inner side of the magnetic attraction seat 8, and a driving piece is arranged above the inner side of the jack.
The magnetic attraction pushing assembly comprises a mounting seat 14 arranged above the inner side of the locking box 1, an inner cavity 16 is formed in the inner side of the mounting seat 14, an electromagnetic shell 13 is fixedly connected to the diagonal top wall of the mounting seat 14, an electromagnetic guide coil is arranged on the inner side of the electromagnetic shell 13, after the electromagnetic attraction pushing assembly is electrified, an electromagnetic field generated can drive an inserting rod 15 to move in a telescopic mode, inserting rods 15 are slidably arranged below the inner sides of the two electromagnetic shells 13, elastic sleeves 32 are fixedly arranged at the bottom ends of the two inserting rods 15, the elastic sleeves 32 at the bottom ends of the inserting rods 15 can be pressed against the upper surface of a pin rod 12 in the extrusion self-locking process, hard contact cannot be caused, and rotary elastic clamping pieces are arranged inside one sides of the two inserting rods 15, which are close to each other.
The rotary elastic clamping piece comprises U-shaped seats 17 which are fixedly arranged at the lower end of the inner side of an inserting rod 15, an inserting shaft 19 is fixedly arranged at the inner side of the U-shaped seat 17, a rotating sleeve 18 is rotatably arranged at the outer side of the inserting shaft 19, a movable rod 20 is fixedly connected below the outer side of the rotating sleeve 18, the movable rod 20 can flexibly rotate under the connection of the rotating sleeve 18 and the inserting shaft 19, a sliding groove 31 is formed in the bottom wall of the inner side of the movable rod 20, an elastic piece 23 is slidably connected to the inner side of the sliding groove 31, a clamping block 22 is fixedly connected to the upper end of the elastic piece 23, the clamping block 22 can be driven to transversely move in the middle of the movable rod 20 in the pulling process, the clamping block 22 slides on the inner side of the movable rod 20, the elastic piece 23 is in a V-shaped shape, a connecting seat 30 is arranged at the bottom of the movable rod 20, rubber rods 34 extend out of the two ends of the connecting seat 30, the rubber rods 34 can be elastically rebounded through the elastic piece 23, the two rubber rods 34 are slidably move inside the sliding groove 31, the corresponding hack rods 24 are connected to the inner walls of the bottom of the movable rod 20, and an elastic piece is arranged at the bottom of the movable rod 20.
The elastic component includes dead lever 27 in the middle of dead lever 20 bottom of fixed mounting, and dead lever 27 inboard rotates installs connecting axle 29, and the outside of connecting axle 29 both ends all overlaps and is equipped with movable sleeve 26, can install corresponding extension spring 28 in the dead lever 27 outside through movable sleeve 26 that sets up, under extension spring 28's self-pulling action, can play tensile effect of tightening, in the roll extrusion process, can let extension spring 28 roll with ball 25 and produce extruded reaction force when supporting the subsides, two sets of movable sleeve 26 outside top all is provided with extension spring 28, two extension spring 28 upper end fixed mounting in the bottom of movable lever 20.
The connecting axle 29 both ends outside all fixedly connected with hack lever 24, the bull stick 33 is all installed in rotation of two hack lever 24 one end inboard, the ball 25 is equipped with to the cover in the middle of the bull stick 33 outside, the ball 25 is under the connection of bull stick 33, can rotate in two hack lever 24 insides, can promote the slope that ball 25 surface is close to pin 12 when moving down, thereby confirm the removal orbit, ball 25 and pin 12 surface movable contact, clamping groove 21 has been seted up to pin 12 inboard correspondence movable rod 20 department, clamping block 22 is close to clamping groove 21's both sides border all is provided with the oblique angle, the oblique angle that sets up in clamping block 22 department can cooperate with the border of clamping groove 21 in the figure 4 of description, when inserted bar 15 concertina movement, clamping block 22 self-clamping, clamping block 22 movable clamping is in the inboard of clamping groove 21.
The driving piece includes that the activity clamps in the inboard response tapered end 11 of jack, and electromagnetic socket 9 is installed in response tapered end 11 outside top intercommunication, and response tapered end 11 is connected through the inboard wire of one end, causes inboard can be circular telegram, makes its electromagnetic socket 9 and the inboard electromagnetic field that produces of lock box 1, through the size and the direction of control current, and the intensity of magnetic field is different, can carry out opposite direction and reverse motion to the circular telegram conductor to let the inserted bar 15 of lower extreme vertically remove, thereby realize the auto-lock function, control lamp 10 is installed at electromagnetic socket 9 both ends, and control lamp 10 is used for showing the switching attribute, thereby makes things convenient for people to observe the circular telegram state.
The outer walls of two sides of the upper lock box 1 and the lower lock box 2 are fixedly provided with fixing buckles 4, the clamping sleeves 5 are sleeved outside the fixing buckles 4 corresponding to the outer sides of the upper lock box 1 in a rotating mode, the clamping sleeves 5 are arranged in an oval mode, buckles 6 extend out of the bottoms of the clamping sleeves 5, the buckles 6 are movably clamped on the outer sides of the fixing buckles 4 below the outer sides of the lower lock box 2, the upper ends of the clamping sleeves 5 are rotatably clamped at the fixing buckles 4 outside the upper lock box 1, and the extended half-opening buckles 6 at the lower ends of the clamping sleeves 5 can be clamped at the fixing buckles 4 outside the lower lock box 2 during daily assembly, so that the clamping sleeves can keep uniformity before assembly, and cannot be separated intentionally.
Working principle: when the electromagnetic valve is used, the induction lock 11 at the lower end of the electromagnetic seat 9 is inserted into the jack position corresponding to the inner side of the magnetic seat 8, then after the circuit is electrified, the inserted link 15 at the inner side of the electromagnetic shell 13 moves downwards, thereby driving the movable link 20 at the outer side to move downwards, the ball 25 at the lower end of the movable link 20 can be abutted against the upper surface of the pin 12 on the lower lock box 2 in the slow downwards moving process, then the corresponding ball 25 is pulled down by the tension spring 28 in the downwards moving process, the movable link 20 is automatically promoted to incline to one side, the clamping block 22 can automatically move flexibly at the middle of the movable link 20 along with the direction of the ball 25, when the ball 25 rolls on the vertical surface of the pin 12, the ball 25 extends downwards, at the moment, the clamping block 22 can be pulled by the linkage of the rubber link 34 and the elastic sheet 23, so that one end inclined plane of the clamping block 22 is pasted on the outer surface of the pin 12 until the clamping block 22 moves to the position of the clamping groove 21, the clamping block 22 can stretch along with the extrusion of the ball 25 and the reaction force of the V-shaped elastic sheet 23, the clamping block 22 is blocked at the position of the clamping groove 21, the clamping block 22 can be promoted to lock the upper lock box 1 and the lower lock box 2 in the aspect of the lock box 2, the lock can be more effectively locked by the lock box 1, and the lock can be more effectively locked by the electromagnetic valve can be more conveniently and more conveniently locked by the lock box 2, and the lock can be more conveniently and more conveniently locked by the lock box 2.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A valve stem locking device for an oil drain valve, characterized by: the novel anti-theft lock comprises an upper lock box (1) and a lower lock box (2), wherein arc grooves (3) are formed in the inner sides of the upper lock box (1) and the lower lock box (2), two arc grooves (3) are spliced into round holes, a magnetic attraction pushing assembly is arranged above the inner sides of the upper lock box (1), pin rods (12) are arranged on the upper diagonal surfaces of the lower lock box (2), a casing (7) is fixedly arranged on the upper surfaces of the upper lock box (1), a magnetic attraction seat (8) is fixedly arranged on the inner sides of the casing (7), insertion holes are formed in the inner sides of the magnetic attraction seat (8), and driving parts are arranged above the inner sides of the insertion holes;
the magnetic attraction pushing assembly comprises mounting seats (14) arranged above the inner sides of the locking boxes (1), inner cavities (16) are formed in the inner sides of the mounting seats (14), electromagnetic shells (13) are fixedly connected to the diagonal top walls of the mounting seats (14), inserting rods (15) are slidably arranged below the inner sides of the two electromagnetic shells (13), elastic sleeves (32) are fixedly arranged at the bottom ends of the two inserting rods (15), and rotary elastic clamping pieces are arranged inside one sides, close to each other, of the two inserting rods (15);
the rotary elastic clamping piece comprises U-shaped seats (17) which are fixedly arranged at the lower ends of the inner sides of inserting rods (15), inserting shafts (19) are fixedly arranged at the inner sides of the U-shaped seats (17), rotating sleeves (18) are rotatably arranged at the outer sides of the inserting shafts (19), movable rods (20) are fixedly connected to the lower sides of the outer sides of the rotating sleeves (18), sliding grooves (31) are formed in the bottom walls of the inner sides of the movable rods (20), elastic pieces (23) are slidably connected to the inner sides of the sliding grooves (31), clamping blocks (22) are fixedly connected to the upper ends of the elastic pieces (23), the clamping blocks (22) are slidably arranged at the inner sides of the movable rods (20), the elastic pieces (23) are arranged in a V-shaped shape, connecting seats (30) are arranged at the bottoms of the movable rods (20), rubber rods (34) are respectively extended from the two ends of each connecting seat (30), the two rubber rods (34) are connected with the inner walls of corresponding hack rods (24), and elastic pieces are arranged at the bottoms of the movable rods (20).
The elastic piece comprises a fixed rod (27) fixedly arranged in the middle of the bottom of the movable rod (20), a connecting shaft (29) is rotatably arranged on the inner side of the fixed rod (27), movable sleeves (26) are sleeved on the outer sides of two ends of the connecting shaft (29), tension springs (28) are arranged above the outer sides of the two groups of movable sleeves (26), and the upper ends of the two tension springs (28) are fixedly arranged at the bottom of the movable rod (20);
the two ends of the connecting shaft (29) are fixedly connected with hack levers (24), the inner sides of one end of each hack lever (24) are rotatably provided with rotating rods (33), the ball (25) is sleeved in the middle of the outer sides of the rotating rods (33), the ball (25) is in movable contact with the surface of the pin rod (12), a clamping groove (21) is formed in the inner side of the pin rod (12) corresponding to the movable rod (20), oblique angles are formed in edges of two sides, close to the clamping groove (21), of each clamping block (22), and the clamping blocks (22) are movably clamped in the inner sides of the clamping grooves (21);
the driving piece comprises an induction lock head (11) movably clamped at the inner side of the jack, an electromagnetic seat (9) is arranged above the outer side of the induction lock head (11) in a communicating mode, and control lamps (10) are arranged at two ends of the electromagnetic seat (9).
2. A valve stem locking device for an oil drain valve according to claim 1, wherein: the outer walls of the two sides of the upper lock box (1) and the lower lock box (2) are fixedly provided with fixing buckles (4), and a clamping sleeve (5) is sleeved outside the fixing buckles (4) corresponding to the outer sides of the upper lock box (1) in a rotating mode.
3. A valve stem locking device for an oil drain valve according to claim 2, wherein: the clamping sleeve (5) is arranged in an oval shape, a buckle (6) extends out of the bottom of the clamping sleeve (5), and the buckle (6) is movably clamped outside the fixed buckle (4) below the outer side of the lower lock box (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311674039.7A CN117386875B (en) | 2023-12-07 | 2023-12-07 | Valve rod locking device for oil drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311674039.7A CN117386875B (en) | 2023-12-07 | 2023-12-07 | Valve rod locking device for oil drain valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117386875A CN117386875A (en) | 2024-01-12 |
| CN117386875B true CN117386875B (en) | 2024-02-06 |
Family
ID=89437567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311674039.7A Active CN117386875B (en) | 2023-12-07 | 2023-12-07 | Valve rod locking device for oil drain valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117386875B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049483A1 (en) * | 1997-04-25 | 1998-11-05 | Neelchine Engineering, Inc. | Lockout device |
| CN210325654U (en) * | 2019-10-09 | 2020-04-14 | 时维峰 | Novel remote circuit breaker for coal mine equipment |
| WO2021174831A1 (en) * | 2020-03-18 | 2021-09-10 | 广州地铁设计研究院股份有限公司 | Single-leaf concrete fireproof protective closed door for high-speed railway and subway tunnels |
| CN215059602U (en) * | 2021-03-11 | 2021-12-07 | 河源新奥燃气有限公司 | Self-locking valve structure of gas tank |
| CN215168942U (en) * | 2021-05-26 | 2021-12-14 | 福建省申伯仕门业有限公司 | Locking device for automatic door automatic lock falling |
| CN216429311U (en) * | 2021-11-17 | 2022-05-03 | 正雄箱包（河源）有限公司 | Intelligent luggage lock and password device |
| CN115095682A (en) * | 2022-07-25 | 2022-09-23 | 蚌埠亿佰年工程检测有限公司 | High-temperature and high-pressure valve |
| CN218598958U (en) * | 2022-11-28 | 2023-03-10 | 上海力典电磁阀有限公司 | Valve capable of preventing misoperation |
-
2023
- 2023-12-07 CN CN202311674039.7A patent/CN117386875B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049483A1 (en) * | 1997-04-25 | 1998-11-05 | Neelchine Engineering, Inc. | Lockout device |
| CN210325654U (en) * | 2019-10-09 | 2020-04-14 | 时维峰 | Novel remote circuit breaker for coal mine equipment |
| WO2021174831A1 (en) * | 2020-03-18 | 2021-09-10 | 广州地铁设计研究院股份有限公司 | Single-leaf concrete fireproof protective closed door for high-speed railway and subway tunnels |
| CN215059602U (en) * | 2021-03-11 | 2021-12-07 | 河源新奥燃气有限公司 | Self-locking valve structure of gas tank |
| CN215168942U (en) * | 2021-05-26 | 2021-12-14 | 福建省申伯仕门业有限公司 | Locking device for automatic door automatic lock falling |
| CN216429311U (en) * | 2021-11-17 | 2022-05-03 | 正雄箱包（河源）有限公司 | Intelligent luggage lock and password device |
| CN115095682A (en) * | 2022-07-25 | 2022-09-23 | 蚌埠亿佰年工程检测有限公司 | High-temperature and high-pressure valve |
| CN218598958U (en) * | 2022-11-28 | 2023-03-10 | 上海力典电磁阀有限公司 | Valve capable of preventing misoperation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117386875A (en) | 2024-01-12 |
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