CN210073651U - Mechanical switch remote control device - Google Patents
Mechanical switch remote control device Download PDFInfo
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- CN210073651U CN210073651U CN201920627640.3U CN201920627640U CN210073651U CN 210073651 U CN210073651 U CN 210073651U CN 201920627640 U CN201920627640 U CN 201920627640U CN 210073651 U CN210073651 U CN 210073651U
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Abstract
The utility model relates to a remote control unit technical field, concretely relates to mechanical type switch remote control unit, this mechanical type switch remote control unit include the fixing base, install output spare on the fixing base, and output spare is for being used for operating the roof pressure piece that the push type switch opened and shut or being used for operating knob formula switch pivoted rotating member, and output spare transmission is connected with the driver, and the driver disposes the controller, and the controller has wireless receiving module to dispose the remote controller, the remote controller have with the wireless transmitting module that wireless receiving module matches. The wireless transmitting module of the remote controller is used for transmitting signals to the wireless receiving module of the controller, the controller drives the output part to move through the control driver, and then the pressing switch is operated to open and close or the knob switch is operated to rotate, so that the remote controller realizes the opening and closing control of the target switch at a longer distance on the premise of not changing the circuits and structures of related equipment and ensuring the stable operation of the related equipment.
Description
Technical Field
The invention relates to the technical field of remote control devices, in particular to a mechanical switch remote control device.
Background
In a factory building, a lot of mechanical devices and electrical devices do not have a function of performing switching operation through remote control, and particularly, when the devices are far apart, a worker is required to walk back and forth to control the switching operation of the devices, which is time-consuming and labor-consuming, and even more, when an emergency occurs, all the devices need to be controlled in a short time, for example, for opening and closing of a push switch or for rotation adjustment of a knob switch, the devices are often far apart, so that it is difficult to control the corresponding switches in a short time, and thus a greater loss is caused. Based on this, in the prior art, people try to refit mechanical equipment or electrical equipment in aspects such as circuits and structures to realize remote control operation, so that the problems of time and labor waste of switch control are solved to a certain extent, and the problem that the switch control operation is difficult to realize in a short time when encountering emergency is also solved.
Because need carry out the repacking in aspects such as circuit, structure to mechanical equipment or electrical equipment, probably influence the stability and the security of former equipment, simultaneously, to some circuit, the comparatively complicated equipment of structure, the cost is too high in the transformation. Therefore, it is an urgent need in the art to provide a mechanical switch remote control device for remotely controlling the switch of a related device without changing the circuit and structure of the related device.
Disclosure of Invention
The invention aims to provide a mechanical switch remote control device, which is used for solving the technical problem that the switch of equipment is difficult to control remotely under the condition of not changing the circuit and the structure of related equipment in the prior art.
In order to achieve the purpose, the mechanical switch remote control device adopts the following technical scheme:
mechanical switch remote control unit, including be used for with push type switch or knob formula switch position fixed connection's fixing base, install output on the fixing base, output for being used for operating the top pressure piece that push type switch opened and shut or being used for operating knob formula switch pivoted rotating member, output transmission is connected with the driver, the driver disposes the controller, and the controller has wireless receiving module to dispose the remote controller, the remote controller have with wireless transmitting module that wireless receiving module matches.
The beneficial effects of the above technical scheme are that: utilize the wireless transmitting module of remote controller to give the wireless receiving module of controller with the signal transmission, the controller drives output piece motion through the control driver, and then the operation push type switch opens and shuts or the rotation of knob formula switch, like this, do not change the circuit of relevant equipment, the structure, under the prerequisite of having guaranteed relevant equipment steady operation, realized the control to the target switch outside far away through the remote controller, better solution exist among the prior art not changing relevant equipment circuit, under the condition of structure, the difficult technical problem of remote control equipment switch.
Further, the driver is a driving motor fixed on the fixing seat, the press-type switch is a ship-type switch, the jacking piece comprises two linkage straight moving rods arranged at intervals, racks are arranged on the two linkage straight moving rods, a gear is arranged at the output end of the driving motor, the two linkage straight moving rods are respectively located on two radial sides of the gear, and the driving motor and the two linkage straight moving rods are in meshing transmission through the racks and the gears so as to drive the two linkage straight moving rods to alternatively jack the ship-type switch when the driving motor rotates forwards and backwards. Because the two operation parts of the ship-shaped switch need to move up and down alternately to realize opening and closing, the opening and closing of the ship-shaped switch can be realized by driving the two linkage straight moving rods of the motor to move up and down alternately, the structure is simple, and the arrangement is convenient; meanwhile, the gear and rack meshing is utilized, and the advantages of high transmission precision and reliable work are achieved.
Furthermore, the push switch is a key switch, and the pressing member includes a reciprocating straight moving rod which is driven by the driver to press the key switch in a reciprocating manner. The key switch needs to move up and down in a reciprocating mode to achieve opening and closing, the driver is used for driving the reciprocating straight moving rod to move in a reciprocating mode, opening and closing of the target switch can be achieved, and the device is simple in arrangement and convenient to achieve.
Furthermore, the driver is a driving motor fixed on the fixed seat, a rack is arranged on the reciprocating linear motion rod, a gear is arranged at the output end of the driving motor, and the driving motor and the reciprocating linear motion rod are in meshing transmission through the gear and the rack so as to drive the reciprocating linear motion rod to push the button switch when the driving motor rotates. Utilize driving motor as the driver, it is convenient to set up, simultaneously, utilize rack and pinion meshing to have the advantage that transmission precision is high, reliable operation.
Furthermore, the reciprocating straight moving rod is provided with a return spring which is used for applying acting force moving in the direction opposite to the jacking direction to the reciprocating straight moving rod so as to reset the reciprocating straight moving rod. After the driving motor controls the reciprocating linear motion rod to complete one-time jacking on the key switch, the reciprocating linear motion rod does not need to return by controlling the driving motor to rotate reversely, but returns under the driving of the return spring, and the energy consumption in the control process is reduced to a certain extent.
Furthermore, one end of the jacking piece, which is in jacking fit with the push switch, is provided with a keycap, and one end of the jacking piece, which is back to the keycap, is provided with a pressing part for manually operating the opening and closing of the push switch. The keycap can prevent the top pressing piece from damaging the push switch in long-term contact with the push switch; and set up and press the splenium for when this device broke down, can realize opening and shutting of push type switch through manual operation according to the splenium, do not influence the normal use of relevant equipment.
Furthermore, the driver is a driving motor fixed on the fixed seat, the rotating part comprises a rotating shaft fixedly connected with the knob switch, a fluted disc is fixed on the rotating shaft, a gear is arranged at the output end of the driving motor, and the driving motor and the rotating shaft are in meshing transmission through the fluted disc so as to drive the rotating shaft to reciprocate to drive the knob switch to rotate when the driving motor rotates forwards and reversely. The knob type switch needs to be adjusted in different states through reciprocating rotation, and the rotating shaft is driven by the driving motor to drive the knob type switch to rotate, so that the structure is simple and the arrangement is convenient; meanwhile, the gear fluted disc meshing has the advantages of high transmission precision and reliable work.
Furthermore, the rotating shaft and the knob switch are fixedly connected through suction of a sucker, and a rotating part used for manually operating the knob switch to rotate is arranged at one end of the rotating shaft, which is back to the sucker. The fixed connection between the sucker and the knob switch is realized through the attraction of the sucker and the knob switch, the process is simple, and the assembly and the disassembly are convenient; simultaneously when this device breaks down, can realize the rotation of knob formula switch through manual operation rotating part to do not influence the normal use of relevant equipment.
Furthermore, a pre-tightening spring for applying an acting force on the sucker to move towards the knob switch is arranged on the rotating shaft. The pre-tightening spring is used for jacking the sucker, so that the stable connection between the sucker and the knob switch is further ensured.
Furthermore, the fixed seat and the push switch or the knob switch are fixedly connected through the attraction of the strong magnet and the magnetic guiding sheet. The strong magnet and the magnetic guiding sheet are attracted to each other, so that the fixed connection between the fixed frame and the target switch is realized, the arrangement is convenient, and the assembly and the disassembly are convenient.
Drawings
FIG. 1 is a diagram illustrating the operation of the remote control device of the mechanical switch according to the present invention;
FIG. 2 is a schematic diagram of the ship-shaped switch controlled by the remote control device for mechanical switch of the present invention;
FIG. 3 is a schematic diagram of the mechanical switch remote control device for controlling the key switch according to the present invention;
FIG. 4 is a schematic diagram of the mechanical switch remote control device for controlling the knob switch according to the present invention;
description of reference numerals: 1-remote controller, 2-controller, 3-wire, 4-driving motor, 401-rack, 402-fluted disc, 403-driving gear, 5-fixed seat, 501-support leg, 502-strong magnet, 503-magnetic guiding sheet, 6-linkage straight moving rod, 7-rotating shaft, 701-rotating part, 702-pre-tightening spring, 703-sucking disc, 8-ship type switch, 9-key switch, 10-knob type switch, 11-pressing part, 12-key cap, 13-reset spring and 14-reciprocating straight moving rod.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The invention relates to a specific embodiment of a mechanical switch remote control device, which comprises the following components:
as shown in fig. 1, the mechanical switch remote control device includes a remote controller 1, a controller 2, a driver and a fixing base 5, the remote controller 1 has a wireless transmitting module, the controller 2 has a wireless receiving module and is adapted to the driver, the fixing base 5 is used for being fixedly connected to a position of a push switch or a knob switch 10, an output member is disposed on the fixing base 5, the output member is a pressing member for operating opening and closing of the push switch or a rotating member for operating rotation of the knob switch 10, the remote controller 1 can transmit a wireless signal to the controller 2 through the wireless transmitting module, the controller 2 converts the wireless signal into an electrical signal and transmits the electrical signal to the driver after receiving the wireless signal, and the driver operates opening and closing of the push switch or rotation of the knob switch 10 through the output member.
In this embodiment, as shown in fig. 1 to 4, the fixing base 5 is a frame structure, and includes an upper cover and a supporting leg 501, a strong magnet 502 is disposed at the bottom of the supporting leg 501, correspondingly, a magnetic guiding sheet 503 is bonded at the position of the target switch, the strong magnet 502 and the magnetic guiding sheet 503 are attracted to achieve the fixed connection between the fixing frame 5 and the position of the target switch, and the attraction connection is convenient for assembly and disassembly. The driver is a driving motor 4 fixed on the fixed seat 5, the controller 2 converts a wireless signal into an electric signal and then transmits the electric signal to the driving motor 4 through the wire 3, and the driving motor 4 operates the opening and closing of the push switch or the rotation of the knob switch through the output part.
Specifically, as shown in fig. 1 and fig. 2, when the target switch is a ship-type switch 8, according to the characteristic that the ship-type switch needs to be opened and closed by the alternate up-and-down movement of two operation parts of the ship-type switch, the jacking member is provided as two interlocked straight moving rods 6 arranged at intervals, the length extending direction of the interlocked straight moving rods 6 is perpendicular to the ship-type switch 8, the output end of the driving motor 4 is provided with a gear, the two interlocked straight moving rods 6 are respectively located at two sides of the gear in the radial direction, and one sides of the two interlocked straight moving rods 6 close to the gear are both provided with a rack 401, and the driving motor 4 and the two interlocked straight moving rods 6 are engaged through the gear and.
When the opening and closing of the ship-shaped switch 8 are controlled, the remote controller 1 controls the forward rotation and the reverse rotation of the driving motor 4 through the controller 2, the driving motor 4 drives the two linkage straight moving rods 6 to alternately move up and down through the forward rotation and the reverse rotation of the driving motor 4, so that the two linkage straight moving rods 6 alternately press the ship-shaped switch 8, and the opening and closing operation of the ship-shaped switch 8 is further realized.
One end of each of the two linkage straight moving rods 6, which is used for being in press fit with the ship-shaped switch 8, is provided with a keycap 12, and the keycaps 12 are made of rubber materials, so that the damage to the ship-shaped switch 8 caused by the linkage straight moving rods 6 in long-term contact with the ship-shaped switch 8 can be avoided; simultaneously, the straight moving rod of interlock 6 one end protrusion in the upper cover of fixing base 5 that faces away from key cap 12, this tip is provided with presses splenium 11, presses splenium 11 to be the rubber material equally, when this device broke down, can press splenium 11 to realize opening and shutting of ship type switch 8 through manual operation to do not influence the normal use of relevant equipment.
As shown in fig. 1 and 3, when the target switch is the key switch 9, according to the feature that the key switch needs to move up and down to realize opening and closing, the pressing member is set as a reciprocating straight moving rod 14, the driving motor 4 and the reciprocating straight moving rod 14 are also in meshing transmission connection through a gear and a rack, specifically, the output end of the driving motor 4 is provided with a gear, the corresponding side of the reciprocating straight moving rod 14 is provided with a rack 401, and the gear is meshed with the rack 401 to realize transmission connection. Meanwhile, one end of the reciprocating straight moving rod 14, which is in abutting fit with the key switch 9, is also provided with a keycap 12 made of rubber for avoiding damage to the key switch 9, one end of the reciprocating straight moving rod 14, which is back to the keycap 12, protrudes out of the upper cover of the fixing seat 5, the end part is also provided with a pressing part 11 which can be used for manual operation to realize opening and closing of the key switch 9, and the pressing part 11 is also made of rubber.
In addition, a reset spring 13 sleeved on the reciprocating straight rod 14 is further arranged between the pressing portion 11 and the upper cover of the fixing seat 5, when the driving motor 4 drives the reciprocating straight rod 14 to press the key switch 9, the reset spring 13 is opened, an acting force moving in the direction opposite to the pressing direction can be applied to the reciprocating straight rod 14, after the driving motor 4 drives the reciprocating straight rod 14 to press the key switch 9, the driving motor 4 is powered off, the reciprocating straight rod 14 is not controlled any more, the reciprocating straight rod 14 resets under the action of the elastic force of the reset spring 13, and the resetting of the reciprocating straight rod 14 is not realized by controlling the driving motor to rotate reversely.
As shown in fig. 1 and 4, when the target switch is the knob switch 10, according to the characteristic that the knob switch needs to be adjusted in different states by reciprocating rotation, the rotating member is configured as a rotating shaft 7 fixedly connected with the knob switch 10, the driving motor 4 is in meshed transmission connection with the rotating shaft 7 through a gear and a toothed disc, specifically, the output end of the driving motor 4 is provided with a driving gear 403, the toothed disc 402 is sleeved and fixed at the middle part of the rotating shaft 7, and the driving gear 403 is meshed with the toothed disc 402 to achieve transmission connection.
The bottom of the rotating shaft 7 is provided with a suction cup 703, the rotating shaft 7 is fixedly connected with the knob switch 10 through the suction of the suction cup 703 and the knob switch 10, and in order to further ensure the stable connection of the suction cup 703 and the knob switch 10, a pre-tightening spring 702 sleeved on the rotating shaft 7 is further arranged between the suction cup 703 and the upper cover of the fixed seat 5, and the pre-tightening spring 702 is in a compressed state and can push the fluted disc 402 to realize the tight suction of the suction cup 703 of the rotating shaft 7 and the knob switch 10.
When the rotation of the knob switch is controlled, the remote controller 1 controls the forward rotation and the reverse rotation of the driving motor 4 through the controller 2, the driving motor 4 drives the rotating shaft 7 to do reciprocating rotation movement through the forward rotation and the reverse rotation of the driving motor 4, so as to operate the rotation of the knob switch 10 and realize the adjustment of different states of the knob switch 10.
In addition, the one end that deviates from sucking disc 703 of rotation axis 7 is protruding in the upper cover of fixing base 5 equally, and this end tip is provided with rotating part 701, and rotating part 701 is the rubber material, when this device broke down, can realize the rotation of knob formula switch 10 through manual operation rotating part 701 to do not influence the normal use of relevant equipment.
When the mechanical switch remote control device works, a remote controller 1 transmits a wireless signal to a controller 2 through a wireless transmitting module, the controller 2 converts the wireless signal into an electric signal after receiving the wireless signal and transmits the electric signal to corresponding driving motors 4 of a ship-shaped switch 8, a key switch 9 and a knob-type switch 10, the driving motors 4 respectively realize the transmission of a linkage straight moving rod 6, a reciprocating straight moving rod 14 and a rotating shaft 7 through the rotation of the driving motors, the linkage straight moving rod 6 controls the ship-shaped switch 8 to be opened and closed, the reciprocating straight moving rod 14 controls the key switch 9 to be opened and closed, the rotating shaft 7 controls the knob-type switch 10 to rotate, when the device is in failure, the ship-shaped switch 8 and the key switch 9 can be controlled to be opened and closed in time by operating the pressing part 11, and the rotating part 701 is operated to control the rotation of the knob-type switch 10, so that the normal use of related equipment is not influenced.
In this embodiment, the fixed connection between the fixing base and the target switch is realized through the attraction between the strong magnet and the magnetic guiding sheet, in other embodiments, a transverse plate parallel to the target switch is integrally arranged at the bottom of the fixing base body, a through hole is formed in the transverse plate, a threaded hole is correspondingly formed in the target switch, and the fixing base is fixedly connected to the target switch through the plug-in bolt.
In this embodiment, the pre-tightening spring is used for pushing the fluted disc to realize the tight suction between the sucker of the rotating shaft and the knob switch, and in other embodiments, the pre-tightening spring may not be provided under the condition that the tight suction between the sucker and the knob switch meets the requirement.
In this embodiment, the rotating shaft and the knob switch are stably connected through the suction of the suction cup and the knob switch, in other embodiments, the suction cup may not be provided, the magnet is arranged at the bottom of the rotating shaft, the magnetic guiding sheet is bonded on the surface of the knob switch, and the rotating shaft and the knob switch are stably connected through the suction of the magnet and the magnetic guiding sheet.
In this embodiment, the end of the rotating shaft protruding out of the upper cover of the fixing frame is provided with a rotating part of a manually rotatable knob switch, the rotating part is made of rubber material, in other embodiments, the rotating part may be made of metal material, such as copper or iron, and of course, in other embodiments, the rotating part may not be provided.
In this embodiment, the end portions of the linkage linear motion rod and the reciprocating linear motion rod, which penetrate through the upper cover of the fixing seat, are provided with pressing portions which can be manually pressed, the pressing portions are made of rubber materials, in other embodiments, the pressing portions can be made of metal materials, such as copper or iron, and of course, in other embodiments, the pressing portions are not provided.
In this embodiment, the driver is a driving motor, in other embodiments, the driver may also be an electric push rod, specifically, the electric push rod may be connected to a link mechanism through an output end, and the link mechanism is in transmission connection with the linkage linear motion rod, the reciprocating linear motion rod and the rotating shaft, so as to realize corresponding movement of the linkage linear motion rod, the reciprocating linear motion rod and the rotating shaft.
In this embodiment, the end of the pressing member, which is in pressing fit with the push switch, has a key cap, and the key cap is made of rubber material, so that the pressing member can be prevented from damaging the push switch in long-term contact with the push switch. In other embodiments, the key cap may also be made of metal, such as copper or iron, but in other embodiments, the key cap may not be provided.
In this embodiment, the reciprocating linear motion rod is provided with a return spring for applying an acting force moving in a direction opposite to the jacking direction to the reciprocating linear motion rod so as to reset the reciprocating linear motion rod, and after the driving motor controls the reciprocating linear motion rod to finish jacking the key switch once, the driving motor does not need to be controlled to rotate reversely so as to realize the resetting of the reciprocating linear motion rod. In other embodiments, the return spring may not be provided, and the reciprocating motion of the reciprocating straight rod is achieved by the forward rotation and the reverse rotation of the driving motor.
In this embodiment, the driver controlling the key switch is a driving motor. In other embodiments, the driver for controlling the key switch may also be an electromagnet, specifically, the electromagnet is disposed on the fixed frame, an armature of the electromagnet is connected to an end of the reciprocating linear motion rod away from the key switch, when the electromagnet is powered on, the armature extends to push the reciprocating linear motion rod to push the key switch, and when the electromagnet is powered off, the armature and the return spring drive the reciprocating linear motion rod to retract.
Claims (10)
1. Mechanical switch remote control unit, its characterized in that: including being used for with push type switch or knob formula switch position fixed connection's fixing base, install output on the fixing base, output for being used for operating the top pressure piece that push type switch opened and shut or being used for operating knob formula switch pivoted rotating member, output transmission is connected with the driver, the driver disposes the controller, and the controller has wireless receiving module to dispose the remote controller, the remote controller have with wireless transmitting module that wireless receiving module matches.
2. The mechanical switch remote control device of claim 1, wherein: the driver is a driving motor fixed on the fixing seat, the press type switch is a boat type switch, the jacking part comprises two linkage straight moving rods arranged at intervals, racks are arranged on the two linkage straight moving rods, the output end of the driving motor is provided with a gear, the two linkage straight moving rods are respectively positioned on two radial sides of the gear, and the driving motor and the two linkage straight moving rods are meshed and driven through the gears and the racks to drive the two linkage straight moving rods to alternatively jack the boat type switch when the driving motor rotates forwards and reversely.
3. The mechanical switch remote control device of claim 1, wherein: the push switch is a key switch, the jacking piece comprises a reciprocating straight moving rod, and the reciprocating straight moving rod is driven by the driver to jack the key switch in a reciprocating mode.
4. The mechanical switch remote control device of claim 3, wherein: the driver is a driving motor fixed on the fixed seat, a rack is arranged on the reciprocating straight moving rod, a gear is arranged at the output end of the driving motor, and the driving motor and the reciprocating straight moving rod are in meshing transmission through the gear and the rack so as to drive the reciprocating straight moving rod to push the key switch when the driving motor rotates.
5. The mechanical switch remote control device of claim 4, wherein: and the reciprocating straight moving rod is provided with a return spring which is used for applying acting force moving in the direction opposite to the jacking direction to the reciprocating straight moving rod so as to reset the reciprocating straight moving rod.
6. The mechanical switch remote control device of any one of claims 2-4, wherein: the end of the top pressing piece, which is in top pressing fit with the pressing switch, is provided with a keycap, and the end of the top pressing piece, which is back to the keycap, is provided with a pressing part for manually operating the opening and closing of the pressing switch.
7. The mechanical switch remote control device of claim 1, wherein: the driver is the driving motor who fixes on the fixing base, the rotating member is including being used for with knob formula switch fixed connection's rotation axis, is fixed with the fluted disc on the rotation axis, and driving motor's output is provided with the gear, and driving motor passes through the gear fluted disc meshing transmission with the rotation axis and reciprocates and drive knob formula switch rotation when driving motor just reverses.
8. The mechanical switch remote control device of claim 7, wherein: the rotary shaft and the knob switch are fixedly connected through suction of the sucker, and a rotary part for manually operating the knob switch to rotate is arranged at one end of the rotary shaft, which faces away from the sucker.
9. The mechanical switch remote control device of claim 8, wherein: and a pre-tightening spring for applying acting force to the sucker to move towards the knob switch is arranged on the rotating shaft.
10. The mechanical switch remote control device of any one of claims 1-5, wherein: the fixed seat and the push switch or the knob switch are fixedly connected through the attraction of the strong magnet and the magnetic guiding sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920627640.3U CN210073651U (en) | 2019-05-05 | 2019-05-05 | Mechanical switch remote control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920627640.3U CN210073651U (en) | 2019-05-05 | 2019-05-05 | Mechanical switch remote control device |
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| Publication Number | Publication Date |
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| CN210073651U true CN210073651U (en) | 2020-02-14 |
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| CN201920627640.3U Active CN210073651U (en) | 2019-05-05 | 2019-05-05 | Mechanical switch remote control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904233A (en) * | 2021-09-30 | 2022-01-07 | 江苏雨龙低压电气设备有限公司 | Intelligent switch cabinet with remote monitoring function and use method thereof |
| CN116650873A (en) * | 2022-02-17 | 2023-08-29 | 中国石油化工股份有限公司 | Remote point/fire extinguishing bomb launching device |
-
2019
- 2019-05-05 CN CN201920627640.3U patent/CN210073651U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904233A (en) * | 2021-09-30 | 2022-01-07 | 江苏雨龙低压电气设备有限公司 | Intelligent switch cabinet with remote monitoring function and use method thereof |
| CN116650873A (en) * | 2022-02-17 | 2023-08-29 | 中国石油化工股份有限公司 | Remote point/fire extinguishing bomb launching device |
| CN116650873B (en) * | 2022-02-17 | 2024-07-23 | 中国石油化工股份有限公司 | Remote point/fire extinguishing bomb launching device |
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