CN115474578A - Oxygenation equipment for aquaculture - Google Patents
Oxygenation equipment for aquaculture Download PDFInfo
- Publication number
- CN115474578A CN115474578A CN202211368490.1A CN202211368490A CN115474578A CN 115474578 A CN115474578 A CN 115474578A CN 202211368490 A CN202211368490 A CN 202211368490A CN 115474578 A CN115474578 A CN 115474578A
- Authority
- CN
- China
- Prior art keywords
- aquaculture
- sliding groove
- fixed mounting
- spout
- sliding block
- 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
- 238000009360 aquaculture Methods 0.000 title claims abstract description 16
- 244000144974 aquaculture Species 0.000 title claims abstract description 16
- 238000006213 oxygenation reaction Methods 0.000 title claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 24
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 239000008188 pellet Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 36
- 230000009467 reduction Effects 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000005276 aerator Methods 0.000 description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 238000000034 method Methods 0.000 description 7
- 241000251468 Actinopterygii Species 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 241000143060 Americamysis bahia Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
Abstract
The invention relates to the technical field of oxygenation equipment, and discloses oxygenation equipment for aquaculture, which comprises a shell and an upper cover, wherein a sliding groove is formed in the lower end face of the upper cover, two first wiring terminals are fixedly mounted at the top end of the inner wall of the sliding groove, a spring and a sliding block are mounted in the sliding groove, a conductor ring is mounted at the edge of the upper end face of the sliding block, a limiting ring is mounted at the lower end of the inner wall of the sliding groove, the first wiring terminals, the conductor ring and a protective resistor are electrically connected with a power supply, a second wiring terminal is symmetrically embedded in the inner wall of the sliding groove at the lower position, a connecting rod and a floating small ball are fixedly mounted at the central position of the lower end face of the sliding block, an indicator lamp is fixedly mounted on the outer side of the sliding groove, and the indicator lamp, the power supply and the second wiring terminal are electrically connected. After the oxygenation equipment for aquaculture is electrified, judging the oil quantity of the speed reducer or judging whether oil leaks according to whether the indicator lamp emits light; shut down the cooling through making the motor short circuit, prevent that reduction gear internal pressure is too high to lead to the oil leak.
Description
Technical Field
The invention relates to the technical field of oxygenation equipment, in particular to oxygenation equipment for aquaculture.
Background
In artificial aquaculture, the densities of fishes, shrimps and the like in a farm are high, and the oxygen content in water is difficult to ensure that the fishes, shrimps and the like in water cannot lack oxygen, so that oxygen increasing equipment is required in aquaculture, and the oxygen increasing equipment at the present stage is mainly an oxygen increasing machine.
The oxygen-increasing machine mainly functions to increase the oxygen content in water so as to ensure that the fish in the water cannot lack oxygen, and can inhibit the growth of anaerobic bacteria in the water, thereby preventing the water in the pool from deteriorating and threatening the living environment of the fish. The aerator can be divided into an impeller type aerator, a waterwheel type aerator, a jet type aerator, a water spray type aerator, an inflatable type aerator, a suction type aerator, a vortex type aerator, an aerator pump and the like, and the impeller type aerator is widely used at present and comprises a motor, a speed reducer, a water surface impeller, a bracket and a floating ball.
When the aerator runs, the motor drives the water surface impeller to rotate through the speed reducer, so that clear water is stirred to be sprayed into the air, and the oxygen solubility in the clear water is increased, however, in the long-time running process of the aerator, the gear friction of the speed reducer continuously generates a large amount of heat, so that the temperature of gearbox oil in the speed reducer is raised and expanded or the gearbox oil is gasified, the pressure in the speed reducer is too high, the gearbox oil in the speed reducer overflows, a water source is polluted, and the normal growth of fishes, shrimps and the like is influenced; moreover, because the aerator runs in water, even if the gearbox oil in the speed reducer leaks, the oil is difficult to find, and the phenomenon of oil shortage and damage of the speed reducer of the aerator occurs.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the existing aerator in the background technology in the using process, the invention provides the aerator for aquaculture, which has the advantages of preventing the oil of the gearbox from expanding and gasifying to overflow and detecting the oil quantity of the gearbox, and solves the technical problems in the background technology.
(II) technical scheme
The invention provides the following technical scheme: the utility model provides an oxygenation equipment for aquaculture, includes casing, upper cover, gear and transmission shaft, the upper end fixed mounting of casing has the upper cover, fixed mounting has the transmission shaft in the casing, the gear has been cup jointed in the activity on the transmission shaft, the meshing transmission between the gear, the spout has been seted up to the lower terminal surface of upper cover, the top fixed mounting of the inner wall of spout has two first terminals, the top fixed mounting of spout has the spring, slidable mounting has the slider in the spout, the slider is located the lower extreme of spring, the border position fixed mounting of slider up end has the conductor ring, the lower extreme position fixed mounting of spout inner wall has the spacing ring, first terminal, conductor ring, protection resistance and power electric connection.
Preferably, the inner wall of the sliding groove is symmetrically embedded into the second wiring terminal by the lower position, the center of the lower end face of the sliding block is fixedly provided with a connecting rod, the lower end of the connecting rod is fixedly connected with a floating ball, the outer side of the sliding groove is fixedly provided with an indicating lamp, and the indicating lamp, the power supply and the second wiring terminal are electrically connected.
Preferably, the air in the chute is at normal atmospheric pressure, the upper end face of the conductor ring slides to the lower end face of the first binding post from an initial state, and the pressure of the compressed air and the spring in the chute on the sliding block reaches a limited pressure.
Preferably, the length of the second binding post is the distance from the initial liquid level of the oil in the reduction gearbox to the specified lowest liquid level.
Preferably, the volume of said floating globule V > (G) Floating ball +G Connecting rod +G Sliding block +kX max ）/（ρ Oil(s) g）。
Preferably, the spring is always in a compressed state.
(III) advantageous effects
The invention has the following beneficial effects:
1. according to the invention, the sliding groove is formed in the upper cover of the speed reducer in an annular array, two first binding posts are fixedly mounted on two sides of the top end of the sliding groove, the spring is mounted in the sliding groove, the sliding block is slidably mounted in the sliding groove, the conductor ring is fixedly mounted at the edge position of the upper end surface of the sliding block, the limiting ring is fixedly mounted at the bottom end of the side surface of the sliding groove, the first binding posts, the protective resistor and the motor are electrically connected, when the automatic aerator works, gears in the speed reducer rub against each other to generate a large amount of heat, gearbox oil in the speed reducer is heated to expand and gasify, the pressure in the speed reducer is increased, at the moment, the pressure in the speed reducer pushes the sliding block to slide upwards in the sliding groove, the volume in the speed reducer is increased, and the phenomenon that the gearbox oil overflows due to high pressure in the speed reducer so as to pollute a water source is avoided.
2. When the automatic aerator continuously works, gearbox oil continues to be heated and expanded and gasified, when the pressure in the speed reducer reaches a limit value, the conductor ring of the upper end surface of the sliding block contacts with the first binding post, so that the motor is short-circuited, the motor stops running, the purpose of stopping and cooling is achieved, when the temperature is reduced, the pressure in the speed reducer is reduced, the conductor ring of the upper end surface of the sliding block leaves the first binding post, the motor is recovered to be electrified, the automatic aerator continues to work, and the oil spilling phenomenon caused by the overhigh internal pressure of the speed reducer is avoided.
3. According to the invention, two second binding posts are symmetrically arranged on the side surface of the sliding chute, the lower end of the sliding block is fixedly provided with the connecting rod, the bottom end of the connecting rod is fixedly provided with the floating small ball, the outer side of the sliding chute is fixedly provided with the indicating lamp, and the indicating lamp, the second binding posts and the power supply are electrically connected. The floating ball floats on the surface of the gearbox oil, the floating ball supports the connecting rod and the sliding block under the action of buoyancy, when the gearbox oil is in a specified range and the aerator is electrified, the conductor ring is in contact with the second wiring terminal, and at the moment, the indicator lamp is electrified and shines to indicate that the gearbox oil is in the specified range and does not overflow; when gearbox oil is not in the specified range, the oxygen-increasing machine circular telegram, the conductor ring is kept away from the second terminal, and the state of opening circuit appears in the pilot lamp, and the pilot lamp can not give out light, shows that gearbox oil is not in the specified range, and gearbox oil probably has the overflow phenomenon, or need add gearbox oil, whether luminous through the pilot lamp to judge gearbox oil and spill over.
Drawings
FIG. 1 is a schematic structural view of a conventional impeller type aerator;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the reducer of the present invention;
FIG. 4 is an enlarged view of a portion of the structure shown in FIG. 3A according to the present invention;
fig. 5 is a circuit diagram of the motor, the first terminal stud and the conductor ring of the present invention.
In the figure: 1. a motor; 2. a speed reducer; 201. a housing; 202. an upper cover; 203. a gear; 204. a drive shaft; 205. a chute; 206. a spring; 207. a first terminal post; 208. a slider; 209. a conductor ring; 210. a limiting ring; 211. a second terminal; 212. a connecting rod; 213. floating the pellets; 214. an indicator light; 3. a water surface impeller; 4. a support; 5. floating the ball; 6. and (4) protecting the resistor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, 3 and 4, an oxygen increasing device for aquaculture comprises a motor 1, a speed reducer 2, a shell 201, a transmission shaft 204, a water surface impeller 3 and floating balls 5, wherein the motor 1 is fixedly connected with the transmission shaft 204 on the upper side of the speed reducer 2 through the transmission shaft 204, the motor 1 is fixedly installed on the upper end of the speed reducer 2, the water surface impeller 3 is fixedly installed on the transmission shaft 204 on the lower end of the speed reducer 2, three supports 4 are arranged on the outer side surface of the speed reducer 2 in an array mode, one end of each support 4 is fixedly installed with the outer side surface of the shell 201 of the speed reducer 2, and the other end of each support 4 is fixedly installed with the floating ball 5.
The speed reducer 2 comprises a shell 201, an upper cover 202, a gear 203 and a transmission shaft 204, wherein the upper cover 202 is fixedly installed at the upper end of the shell 201, the transmission shaft 204 is fixedly installed in the shell 201, the gear 203 is movably sleeved on the transmission shaft 204, the gear 203 is in meshing transmission, a plurality of convex blocks are arrayed on the upper end face of the upper cover 202 by taking the axis of the upper cover 202 as the center, a sliding groove 205 is formed in the lower end face of the upper cover 202, the sliding groove 205 is located in each convex block, two first binding posts 207 are fixedly installed at the top end of the inner wall of the sliding groove 205, the two first binding posts 207 are respectively electrically connected to two ends of a power supply, a spring 206 is fixedly installed at the top end of the sliding groove 205, a sliding block 208 is installed in the sliding groove 205, the sliding block 208 is located at the lower end of the spring 206, the sliding block 208 can only slide axially in the sliding groove 205, the upper end face of the sliding block 208 is fixedly connected with the spring 206, a conductor ring 209 is fixedly installed at the edge position of the upper end face of the sliding block 208, a limit ring 210 is fixedly installed at the lower end position of the inner wall of the sliding groove 205, the first binding post 207, the conductor ring 209 and the protective resistor 6 is electrically connected with the power supply.
The inner wall of the sliding groove 205 is symmetrically embedded into the second binding post 211 at a lower position, a connecting rod 212 is fixedly mounted at the center position of the lower end face of the sliding block 208, a floating ball 213 is fixedly connected to the lower end of the connecting rod 212, an indicator lamp 214 is fixedly mounted on the outer side of the sliding groove 205, and the indicator lamp 214, a power supply and the second binding post 211 are electrically connected.
The air in the chute 205 is at normal atmospheric pressure, the upper end face of the conductor ring 209 slides to the lower end face of the first binding post 207 from the initial state, and the compressed air in the chute 205 and the pressure of the spring 206 on the sliding block 208 reach a limited pressure. And the machine is stopped to cool down after the pressure in the speed reducer 2 reaches a limit value.
The length of the second terminal 211 is the distance from the initial liquid level of the gearbox oil to the specified lowest liquid level. In the initial state, the conductor ring 209 can be in contact with the second terminal 211, and when the reduction gear box oil level is lower than a predetermined level, the conductor ring 209 does not contact the second terminal 211.
The spring 206 is always in compression.
Buoyancy F to which the floating ball 213 is subjected Floating body =ρ Oil(s) gV, spring 206 receives spring force F Bullet =kX。
Wherein: rho Oil Is the density of the transmission oil; g is the acceleration of gravity; v is the volume of the floating pellet 213; k is the spring constant of spring 206; x is the amount of deformation of the spring 206.
F Floating body =G Floating ball +G Connecting rod +G Sliding block +F Bullet
I.e. p Oil(s) gV Row board =G Floating ball +G Connecting rod +G Sliding block +kX
V Row board =（G Floating ball +G Connecting rod +G Sliding block +kX）/（ρ Oil g）
Wherein: g Floating ball The weight of the floating pellet 213; g Connecting rod Is the weight of the connecting rod 212; g Sliding block Is the weight of the slider 208; v Row board Displacing volume of transmission oil for the floating ball 213.
The volume V of the floating ball 213 is more than V Row board ，
I.e. V > (G) Floating ball +G Connecting rod +G Sliding block +kX max ）/（ρ Oil(s) g）。
A plurality of groups of first binding posts 207 and second binding posts 211 can be connected in series in a circuit, so that the detection accuracy is improved; multiple sets of the first terminal post 207 and the second terminal post 211 can be connected in parallel in the circuit, so that the circuit sensitivity is improved.
The use method (working principle) of the invention is as follows:
referring to fig. 2, 3, 4 and 5, when the aerator works, the motor 1 drives the transmission shaft 204 to rotate, the transmission shaft 204 drives the gear 203 in the speed reducer 2 to mesh for transmission, the gear 203 rubs against each other to generate a large amount of heat, the gearbox oil in the speed reducer 2 is heated to expand and gasify, the pressure in the speed reducer 2 is increased, at the moment, the pressure in the speed reducer 2 pushes the sliding block 208 to slide upwards in the sliding groove 205, the internal volume of the speed reducer 2 is increased, the pressure in the speed reducer 2 is balanced, and the phenomenon that the gearbox oil overflows due to high pressure in the speed reducer 2, so that a water source is polluted is avoided; when the oxygen-increasing machine lasts the during operation, gearbox oil continues to be heated expansion and gasification, when pressure in reduction gear 2 reached the limit value, the conductor ring 209 contact first terminal 207 of slider 208 up end, thereby make short circuit phenomenon appear in motor 1, the shutdown, reach the purpose of shutting down the cooling, 2 temperature drop when reduction gear, 2 internal pressure of reduction gear reduce the back, slider 208 moves down, the conductor ring 209 of slider 208 up end leaves first terminal 207, 1 power-on that resumes of motor, the oxygen-increasing machine continues to work, the condition of oil spilling has been avoided appearing because of reduction gear 2 internal pressure is too high.
When the automatic aerator is started, the floating ball 213 floats on the surface of the gearbox oil, the floating ball 213 supports the connecting rod 212 and the sliding block 208 under the action of buoyancy, when the height of the gearbox oil is in a specified range, the conductor ring 209 is in contact with the second wiring terminal 211 when the automatic aerator is electrified, and at the moment, the indicator lamp 214 is electrified and shines to indicate that the gearbox oil is in the specified range and the overflow condition does not occur; when the gearbox oil is lower than the specified range, the floating ball 213 drives the connecting rod 212 and the sliding block 208 to move downwards, when the aerator is electrified, the conductor ring 209 on the upper end surface of the sliding block 208 is disconnected from the second binding post 211, the indicator lamp 214 is in an open circuit state, the indicator lamp 214 does not emit light, the phenomenon that the gearbox oil possibly overflows when the gearbox oil is lower than the specified range is shown, or the gearbox oil needs to be added, the indicator lamp 214 is observed to emit light after the aerator is electrified, the gearbox oil quantity is detected, and therefore whether the gearbox oil overflows is judged.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an oxygen equipments for aquaculture, includes casing (201), upper cover (202), gear (203) and transmission shaft (204), the upper end fixed mounting of casing (201) has upper cover (202), fixed mounting has transmission shaft (204) in casing (201), gear (203) have been cup jointed in the activity on transmission shaft (204), meshing transmission, its characterized in that between gear (203): spout (205) have been seted up to the lower terminal surface of upper cover (202), the top fixed mounting of the inner wall of spout (205) has two first terminal (207), the top fixed mounting of spout (205) has spring (206), slidable mounting has slider (208) in spout (205), slider (208) are located the lower extreme of spring (206), the border position fixed mounting of slider (208) up end has conductor ring (209), the lower extreme position fixed mounting of spout (205) inner wall has spacing ring (210), first terminal (207), conductor ring (209), protective resistor (6) and power electric connection.
2. The oxygenation device for aquaculture of claim 1, wherein: spout (205) inner wall leans on lower position symmetry to imbed second terminal (211), the central point of terminal surface puts fixed mounting has connecting rod (212) under slider (208), connecting rod (212) lower extreme fixedly connected with floats bobble (213), spout (205) outside fixed mounting has pilot lamp (214), power and second terminal (211) electric connection.
3. The oxygenation device for aquaculture of claim 2, wherein: the air in the sliding groove (205) is at normal atmospheric pressure, the upper end face of the conductor ring (209) slides to the lower end face of the first binding post (207) from an initial state, and the pressure of the compressed air in the sliding groove (205) and the spring (206) on the sliding block (208) reaches a limited pressure.
4. The oxygenation device for aquaculture of claim 3, wherein: the length of the second binding post (211) is the distance from the initial liquid level of the gearbox oil to the specified lowest liquid level.
5. The oxygenation device for aquaculture of claim 4, wherein: volume V > (G) of said floating pellet (213) Floating ball +G Connecting rod +G Sliding block +kX max ）/（ρ Oil(s) g）。
6. The oxygenation device for aquaculture of claim 5, wherein: the spring (206) is always in a compressed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211368490.1A CN115474578A (en) | 2022-11-03 | 2022-11-03 | Oxygenation equipment for aquaculture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211368490.1A CN115474578A (en) | 2022-11-03 | 2022-11-03 | Oxygenation equipment for aquaculture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115474578A true CN115474578A (en) | 2022-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211368490.1A Pending CN115474578A (en) | 2022-11-03 | 2022-11-03 | Oxygenation equipment for aquaculture |
Country Status (1)
| Country | Link |
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| CN (1) | CN115474578A (en) |
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|---|---|---|---|---|
| CN2307356Y (en) * | 1997-06-27 | 1999-02-10 | 蔡荣吉 | Ball structure of float switch |
| CN104221988A (en) * | 2014-09-10 | 2014-12-24 | 许爱军 | Water trough type aeration and wave production integrated machine |
| CN104855329A (en) * | 2015-04-23 | 2015-08-26 | 河南省水产科学研究院 | Oxygen increasing machine impeller and oxygen increasing machine with oxygen increasing machine impeller |
| CN109361462A (en) * | 2018-11-17 | 2019-02-19 | 罗瑞琪 | A kind of protective device of local cable optical transmission device |
| RU195744U1 (en) * | 2019-10-21 | 2020-02-04 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Петрозаводский государственный университет" | WATER OXYGENATION DEVICE |
| CN215412832U (en) * | 2021-06-25 | 2022-01-04 | 泰兴市志晋金属制品有限公司 | Dryer with temperature control function |
-
2022
- 2022-11-03 CN CN202211368490.1A patent/CN115474578A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2307356Y (en) * | 1997-06-27 | 1999-02-10 | 蔡荣吉 | Ball structure of float switch |
| CN104221988A (en) * | 2014-09-10 | 2014-12-24 | 许爱军 | Water trough type aeration and wave production integrated machine |
| CN104855329A (en) * | 2015-04-23 | 2015-08-26 | 河南省水产科学研究院 | Oxygen increasing machine impeller and oxygen increasing machine with oxygen increasing machine impeller |
| CN109361462A (en) * | 2018-11-17 | 2019-02-19 | 罗瑞琪 | A kind of protective device of local cable optical transmission device |
| RU195744U1 (en) * | 2019-10-21 | 2020-02-04 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Петрозаводский государственный университет" | WATER OXYGENATION DEVICE |
| CN215412832U (en) * | 2021-06-25 | 2022-01-04 | 泰兴市志晋金属制品有限公司 | Dryer with temperature control function |
Non-Patent Citations (1)
| Title |
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| 鲁植雄: "《汽车拖拉机学》" * |
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Application publication date: 20221216 |