CN213495486U - But self-cleaning's water tank - Google Patents
But self-cleaning's water tank Download PDFInfo
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- CN213495486U CN213495486U CN202022592454.6U CN202022592454U CN213495486U CN 213495486 U CN213495486 U CN 213495486U CN 202022592454 U CN202022592454 U CN 202022592454U CN 213495486 U CN213495486 U CN 213495486U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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Abstract
The utility model discloses a but self-cleaning's water tank, including water tank box and cavity, the blow off water pipe is installed to inside bottom one side of cavity, and the one end of blow off water pipe runs through cavity and water tank box, the one end of blow off water pipe is installed and is turned round, the outlet pipe is installed to the bottom of water tank box one side, and the one end of outlet pipe runs through water tank box and the cavity extends to inside, one side of cavity is encircleed and is installed the heating wire, the one side on water tank box top is installed to catchment structrual installation, and one end runs through water tank box and the cavity extends to inside. The utility model discloses under servo motor's drive, be connected with the screw rod through the output, the screw rod begins to rotate thereupon, under the drive of screw rod for first fixed block, head rod, first fixed plate begin to rotate, and the water tank begins to rotate thereupon, and the rotation of the screw rod of the same reason drives the movable block and reciprocates, because reciprocating of the movable block drives the brush and reciprocates, has reached the effect to water tank self-cleaning.
Description
Technical Field
The utility model relates to a domestic water stores technical field, specifically is a but self-cleaning's water tank.
Background
With the increasing apprehension of modern people, some water tanks for household and factory use become more and more robber in the market, and in case of some sudden conditions, water is unnecessary to be lacked, so that the characteristic that the water tank can store water is welcomed.
With the continuous installation and use of the water tank, the following problems are found in the use process:
1. traditional water tank does not have automatic clearance structure when the clearance, needs the manual work to go into clean, causes very big burden.
2. The inside water of traditional water tank comes from artifical transmission, and the source is single, can not carry out automatic collection to the rainwater.
3. The traditional water tank can not control the amount of water inflow when water enters, so that the water tank is filled with too much or too little water, and the utilization rate of the water tank is reduced.
It is therefore desirable to design a water tank that can be automatically cleaned in response to the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a water tank that can clear up automatically to propose the current problem that does not have automatic clearance structure, water source singleness and uncontrollable inflow in solving above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a water tank capable of being automatically cleaned comprises a water tank body and a cavity, and further comprises a water collecting structure for collecting rainwater, a water control structure for controlling water inflow and an automatic cleaning structure with an automatic cleaning function;
a sewage discharge pipe is mounted on one side of the bottom end inside the cavity, one end of the sewage discharge pipe penetrates through the cavity and the water tank body, a rotating head is mounted at one end of the sewage discharge pipe, a water outlet pipe is mounted at the bottom end of one side of the water tank body, one end of the water outlet pipe penetrates through the water tank body and the cavity and extends into the cavity, a heating wire is mounted on one side of the cavity in a surrounding mode, the water collecting structure is mounted on one side of the top end of the water tank body, and one end of the water collecting structure penetrates;
a water inlet pipe is arranged at one side, away from the water collecting structure, of the top end of the water tank body, one end of the water inlet pipe penetrates through the water tank body and the cavity to extend into the water tank body, and the water control structure is arranged at one end of the water inlet pipe; the top intermediate position department of water tank box installs servo motor, and servo motor's output runs through water tank box and cavity and extends to inside, self-cleaning structure installs at servo motor's output.
Preferably, the automatic cleaning structure further comprises a screw rod, the screw rod is installed at the output end of the servo motor, a second fixed block is installed at the top middle position inside the cavity, a moving block is sleeved on the outer wall of the screw rod, second connecting rods are installed on two sides of the moving block, a spring block is installed at one end of the second connecting rod, a brush is installed on one side of the spring block, a first fixed block is installed at one end of the screw rod, first connecting rods are installed on two sides of the first fixed block, a first fixed plate is installed at one end of each first connecting rod, and one side of the first fixed plate is installed at the bottom end of one side inside the cavity.
Preferably, the water collecting structure comprises a filter screen, a second fixing plate, a flow collecting cover, a threaded block, a screw rod, a rotating block, a fixing rod, a third connecting rod, a supporting tube and a water inlet hole, the supporting tube is arranged at one side of the top end of the water tank body, which is far away from the water inlet tube, the bottom end of the supporting tube penetrates through the water tank body and the cavity to extend into the water tank body, the filter screen is arranged at the middle position of two sides of the interior of the supporting tube, the second fixing plate is arranged at the top end of the supporting tube, the water inlet hole is formed in the middle position of the second fixing plate, the fixing rod is arranged on the inner wall of the water inlet hole, the flow collecting cover is hinged to the top end of the inner wall of the water inlet hole through an articulated piece, the screw rod is arranged at the bottom end of the rotating block, one end of the screw rod is connected with the fixed rod through a bearing.
Preferably, accuse water structure still includes chock, stopper, slide rail, third fixed plate, slider and third fixed block, the third fixed plate is installed on the outer wall of inlet tube one end, the third fixed block is all installed to the both sides of chock, and one side of third fixed block installs the slider, one side of third fixed plate be provided with slider assorted slide rail, the sliding connection that the third fixed block passes through slider and slide rail constitutes sliding structure with the third fixed plate, the stopper is installed to the bottom of slide rail.
Preferably, the output end of the servo motor penetrates through the second fixing block and is connected with the screw rod.
Preferably, the aperture of the water inlet hole is smaller than that of the support tube.
Preferably, the top end of the chock block is arc-shaped, and the size of the top end of the chock block is the same as the diameter of the water inlet pipe.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the automatic cleaning device is provided with the servo motor, the moving block, the second connecting rod, the spring block, the brush, the first fixing plate and the first fixing block, when the automatic cleaning device is used, the servo motor is started, the screw rod is connected with the screw rod through the output end under the driving of the servo motor, the screw rod starts to rotate along with the screw rod, the first fixing block, the first connecting rod and the first fixing plate start to rotate under the driving of the screw rod, the water tank starts to rotate along with the screw rod, the moving block is driven to move up and down through the rotation of the screw rod in a similar manner, and the brush is driven to move up and;
2. by arranging the flow collecting cover, the threaded block, the screw rod, the fixed rod, the filter screen, the rotating block, the third connecting rod and the second fixed plate, in the rainy weather during use, a worker can drive the screw rod to rotate by rotating the rotating block due to the structural relationship between the screw rod and the threaded block, the threaded block can be driven to move downwards by rotating the screw rod, the flow collecting cover is gradually unfolded along with the downward movement of the threaded block through the hinged relationship with the third connecting rod and the hinged relationship between the third connecting rod and the flow collecting cover, rainwater enters the support tube under the guidance of the flow collecting cover and finally enters the cavity after being filtered by the filter screen, and the rainwater is collected, so that the cost is saved;
3. through being provided with the chock, the stopper, the slide rail, the third fixed plate, the slider, the third fixed block, when using, the staff is connected with the water source from the inlet tube, open the water source switch, water the water tank, increase along with the inside water yield of cavity, the water level rises, rise to the chock of contacting at the water level, because density relation reason, the buoyancy that the chock can receive water rises along with water, again because the sliding structure relation of chock and third fixed plate, when the water level rises to the one end of inlet tube, the chock can be plugged up the one end of inlet tube, the inside of cavity can not intake, the accuse water effect has been reached.
Drawings
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is a schematic view of the water collecting structure of the present invention;
FIG. 3 is a schematic view of the structure of the water control structure of the present invention;
fig. 4 is a schematic top view of the present invention.
In the figure: 1. a first fixing plate; 2. a brush; 3. a first fixed block; 4. a water outlet pipe; 5. a first connecting rod; 6. a sewage draining pipe; 7. turning the head; 8. a water tank body; 9. heating wires; 10. a chamber; 11. a second connecting rod; 12. a water collection structure; 1201. a filter screen; 1202. a second fixing plate; 1203. a flow-collecting hood; 1204. a thread block; 1205. a screw rod; 1206. rotating the block; 1207. fixing the rod; 1208. a third connecting rod; 1209. supporting a tube; 1210. a water inlet hole; 13. a moving block; 14. a servo motor; 15. A second fixed block; 16. a screw; 17. a water inlet pipe; 18. a water control structure; 1801. a chock block; 1802. a limiting block; 1803. a slide rail; 1804. a third fixing plate; 1805. a slider; 1806. a third fixed block; 19. And a spring block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1: referring to fig. 1-4, the present invention provides a technical solution: a water tank capable of being automatically cleaned comprises a water tank body 8, a cavity 10, a water collecting structure 12 for collecting rainwater, a water control structure 18 for controlling water inflow and an automatic cleaning structure with an automatic cleaning function;
a sewage discharge pipe 6 is installed on one side of the bottom end inside the cavity 10, one end of the sewage discharge pipe 6 penetrates through the cavity 10 and the water tank body 8, a rotating head 7 is installed on one end of the sewage discharge pipe 6, a water outlet pipe 4 is installed on the bottom end of one side of the water tank body 8, one end of the water outlet pipe 4 penetrates through the water tank body 8 and the cavity 10 and extends to the inside, a heating wire 9 is installed on one side of the cavity 10 in a surrounding mode, a water collecting structure 12 is installed on one side of the top end of the water tank body 8, and one end of the water;
a water inlet pipe 17 is arranged at one side of the top end of the water tank body 8, which is far away from the water collecting structure 12, one end of the water inlet pipe 17 penetrates through the water tank body 8 and the cavity 10 and extends to the inside, and a water control structure 18 is arranged at one end of the water inlet pipe 17;
a servo motor 14 is arranged in the middle of the top end of the water tank body 8, the output end of the servo motor 14 penetrates through the water tank body 8 and the cavity 10 and extends to the inside, and the automatic cleaning structure is arranged at the output end of the servo motor 14;
referring to fig. 1-4, the water tank capable of being automatically cleaned further comprises an automatic cleaning structure, the automatic cleaning structure comprises a screw 16, the screw 16 is mounted at an output end of a servo motor 14, a second fixed block 15 is mounted at a middle position of a top end inside a chamber 10, a moving block 13 is sleeved on an outer wall of the screw 16, second connecting rods 11 are mounted on two sides of the moving block 13, a spring block 19 is mounted at one end of each second connecting rod 11, a brush 2 is mounted on one side of the spring block 19, a first fixed block 3 is mounted at one end of the screw 16, first connecting rods 5 are mounted on two sides of the first fixed block 3, a first fixed plate 1 is mounted at one end of each first connecting rod 5, and one side of the first fixed plate 1 is mounted at a bottom end of one side;
the output end of the servo motor 14 penetrates through the second fixing block 15 and is connected with the screw 16;
specifically, as shown in fig. 1 and 4, by providing a servo motor, a moving block, a second connecting rod, a spring block, a brush, a first fixing plate and a first fixing block, the servo motor is turned on during use, the screw 16 is connected with the output end under the driving of the servo motor 14, the screw 16 starts to rotate therewith, the first fixing block 3, the first connecting rod 5 and the first fixing plate 1 start to rotate under the driving of the screw 16, the water tank starts to rotate therewith, and the moving block 13 is driven to move up and down by the rotation of the screw 16 in a similar manner, the brush 2 is driven to move up and down by the up and down movement of the moving block 13, and the switch valve 7 is turned on after the cleaning is finished, so that the effect of automatically cleaning the water tank is achieved, and the labor.
Example 2: the water collecting structure 12 comprises a filter screen 1201, a second fixing plate 1202, a flow collecting cover 1203, a thread block 1204, a screw mandrel 1205, a rotating block 1206, a fixing rod 1207, a third connecting rod 1208, a supporting pipe 1209 and a water inlet 1210, wherein the supporting pipe 1209 is installed on one side, far away from the water inlet pipe 17, of the top end of the water tank box 8, the bottom end of the supporting pipe 1209 penetrates through the water tank box 8 and the chamber 10 and extends to the inside, the filter screen 1201 is installed at the middle position of two sides of the inside of the supporting pipe 1209, the second fixing plate 1202 is installed at the top end of the supporting pipe 1209, the water inlet 1210 is arranged at the middle position of the second fixing plate 1202, the fixing rod 1207 is installed on the inner wall of the water inlet 1210, the flow collecting cover 1203 is hinged to the top end of the inner wall of the water inlet 1210 through a hinge, the screw mandrel 1205, one end of a third connecting rod 1208 is hinged with the current collecting cover 1203 through a hinge, and one end of a screw rod 1205 is connected with the fixing rod 1207 through a bearing;
the aperture of the water inlet 1210 should be smaller than that of the support tube 1209;
specifically, as shown in fig. 1, fig. 2 and fig. 3, by being provided with the mass flow cover, the thread block, the lead screw, the fixed rod, the filter screen, the rotation block, the third connecting rod, the second fixed plate, in rainy weather during the use, the staff can rotate the rotation block 1206, the rotation of the rotation block 1206 drives the rotation of the lead screw 1205, because of the structural relationship of the lead screw 1205 and the thread block 1204, it can drive the thread block 1204 to move downwards to rotate at the lead screw 1205, along with the downward movement of the thread block 1204, through the hinged relationship with the third connecting rod 1208 and the hinged relationship of the third connecting rod 1208 and the mass flow cover 1203, the mass flow cover 1203 gradually expands, the rainwater enters the support tube 1209 under the guide of the mass flow cover 1203, finally enters the chamber 10 through the filtration of the filter screen 1201, and in the rainy weather, the collection and utilization can be.
Example 3: the water control structure 18 further comprises a stopper 1801, a limit block 1802, a slide rail 1803, a third fixing plate 1804, a slide block 1805 and a third fixing block 1806, the third fixing plate 1804 is mounted on the outer wall of one end of the water inlet pipe 17, the third fixing block 1806 is mounted on both sides of the stopper 1801, the slide block 1805 is mounted on one side of the third fixing block 1806, the slide rail 1803 matched with the slide block 1805 is arranged on one side of the third fixing plate 1804, the third fixing block 1806 forms a sliding structure with the third fixing plate 1804 through the sliding connection of the slide block 1805 and the slide rail 1803, and the limit block 1802 is mounted at the bottom end of the slide rail 1803;
the top end of the chock 1801 is arc-shaped, and the size of the top end of the chock 1801 is the same as the diameter of the water inlet pipe 17;
specifically, as shown in fig. 1 and 3, through being provided with the chock, the stopper, a slide rail, the third fixed plate, the slider, the third fixed block, when using, the staff is connected with the water source from inlet tube 17, open the water source switch, water the water tank, increase along with the inside water yield of cavity 10, the water level rises, rise to contact chock 1801 at the water level, because density relation reason, chock 1801 can receive the buoyancy of water and rise along with water, because the sliding structure relation of chock 1801 and third fixed plate 1804, when the water level rises to the one end of inlet tube 17, chock 1801 can block up the one end of inlet tube 17, the inside of cavity 10 can not intake, thereby reached in the cavity when the water level rises to certain degree just automatic shutdown. The control of the water inflow is realized.
The working principle is as follows: when using this device, at first the staff is connected with the water source from inlet tube 17, open the water source switch, water the water tank, increase along with the inside water yield of cavity 10, the water level rises, it touches chock 1801 to rise to the water level, because density relation reason, the buoyancy that water can be received to chock 1801 rises along with water, again because the sliding structure relation of chock 1801 and third fixed plate 1804, when the water level rises to the one end of inlet tube 17, chock 1801 can be stopped up the one end of inlet tube 17, the inside of cavity 10 can not intake, water control effect has been reached.
In rainy weather, if the requirement on water quality is not very high, rainwater can be accepted, a worker can rotate the rotating block 1206, the rotating block 1206 rotates to drive the screw rod 1205 to rotate, the screw rod 1205 and the thread block 1204 rotate to drive the thread block 1204 to move downwards, along with the downward movement of the thread block 1204, the flow collecting cover 1203 is gradually unfolded through the hinged relation with the third connecting rod 1208 and the hinged relation between the third connecting rod 1208 and the flow collecting cover 1203, rainwater enters the supporting pipe 1209 under the guide of the flow collecting cover 1203, and finally enters the chamber 10 after being filtered by the filter screen 1201.
Finally, the automatic cleaning function is required to be started in the water tank, a worker needs to fill a little water into the cavity 10 through the water inlet pipe 17 in advance, then the servo motor 14 is started, the screw 16 is connected with the output end under the driving of the servo motor 14, the screw 16 starts to rotate along with the screw, the first fixing block 3, the first connecting rod 5 and the first fixing plate 1 start to rotate under the driving of the screw 16, the water tank starts to rotate along with the rotation of the servo motor 14, the moving block 13 is driven to move up and down by the rotation of the screw 16, the brush 2 is driven to move up and down by the up and down movement of the moving block 13, the effect of rotating and washing the water tank at the same time is achieved.
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 (7)
1. A self-cleaning water tank, comprising a tank body (8) and a chamber (10), characterized in that: the automatic cleaning device also comprises a water collecting structure (12) for collecting rainwater, a water control structure (18) for controlling water inflow and an automatic cleaning structure with an automatic cleaning function;
a sewage discharge pipe (6) is installed on one side of the bottom end inside the cavity (10), one end of the sewage discharge pipe (6) penetrates through the cavity (10) and the water tank body (8), a rotating head (7) is installed at one end of the sewage discharge pipe (6), a water outlet pipe (4) is installed at the bottom end of one side of the water tank body (8), one end of the water outlet pipe (4) penetrates through the water tank body (8) and the cavity (10) and extends to the inside, a heating wire (9) is installed on one side of the cavity (10) in a surrounding mode, the water collecting structure (12) is installed on one side of the top end of the water tank body (8), and one end of the water collecting structure penetrates through the water tank body (;
a water inlet pipe (17) is mounted on one side, away from the water collecting structure (12), of the top end of the water tank body (8), one end of the water inlet pipe (17) penetrates through the water tank body (8) and the cavity (10) and extends to the inside, and the water control structure (18) is mounted at one end of the water inlet pipe (17);
servo motor (14) are installed to the top intermediate position department of water tank box (8), and the output of servo motor (14) runs through water tank box (8) and cavity (10) and extends to inside, the output at servo motor (14) is installed to the self-cleaning structure.
2. An automatically cleanable water tank as claimed in claim 1, wherein: the automatic cleaning structure further comprises a screw rod (16), the output end of a servo motor (14) is installed at the screw rod (16), a second fixed block (15) is installed at the top middle position inside the cavity (10), a moving block (13) is sleeved on the outer wall of the screw rod (16), second connecting rods (11) are installed on two sides of the moving block (13), spring blocks (19) are installed at one ends of the second connecting rods (11), brushes (2) are installed on one sides of the spring blocks (19), first fixed blocks (3) are installed at one ends of the screw rod (16), first connecting rods (5) are installed on two sides of the first fixed blocks (3), first fixing plates (1) are installed at one ends of the first connecting rods (5), and one sides of the first fixing plates (1) are installed at the bottom end of one side inside the cavity (10).
3. An automatically cleanable water tank as claimed in claim 1, wherein: the water collecting structure (12) comprises a filter screen (1201), a second fixing plate (1202), a flow collecting cover (1203), a threaded block (1204), a screw rod (1205), a rotating block (1206), a fixing rod (1207), a third connecting rod (1208), a supporting pipe (1209) and a water inlet hole (1210), wherein the supporting pipe (1209) is installed on one side, far away from a water inlet pipe (17), of the top end of a water tank body (8), the bottom end of the supporting pipe (1209) penetrates through the water tank body (8) and a chamber (10) to extend into the water tank body, the filter screen (1201) is installed at the middle position of two sides of the interior of the supporting pipe (1209), the second fixing plate (1202) is installed at the top end of the supporting pipe (1209), the water inlet hole (1210) is arranged at the middle position of the second fixing plate (1202), the fixing rod (1207) is installed on the inner wall of the water inlet hole (1210, lead screw (1205) is installed to the bottom of rotatory piece (1206), and the outer wall cover of lead screw (1205) is equipped with screw block (1204), the both sides of screw block (1204) all articulate through the articulated elements has third connecting rod (1208), and the one end of third connecting rod (1208) is articulated through articulated elements and collection flow cover (1203), the one end of lead screw (1205) is connected with dead lever (1207) through the bearing.
4. An automatically cleanable water tank as claimed in claim 1, wherein: accuse water structure (18) still includes chock (1801), stopper (1802), slide rail (1803), third fixed plate (1804), slider (1805) and third fixed block (1806), install on the outer wall of inlet tube (17) one end third fixed plate (1804), third fixed block (1806) are all installed to the both sides of chock (1801), and slider (1805) are installed to one side of third fixed block (1806), one side of third fixed plate (1804) is provided with slide rail (1803) with slider (1805) assorted, third fixed block (1806) constitute sliding structure through the sliding connection of slider (1805) and slide rail (1803) and third fixed plate (1804), stopper (1802) are installed to the bottom of slide rail (1803).
5. An automatically cleanable water tank as claimed in claim 2, wherein: the output end of the servo motor (14) penetrates through the second fixing block (15) and is connected with the screw rod (16).
6. A self-cleaning water tank as claimed in claim 3, wherein: the aperture of the water inlet hole (1210) is smaller than that of the supporting pipe (1209).
7. An automatically cleanable water tank as claimed in claim 4, wherein: the top end of the chock block (1801) is arc-shaped, and the size of the top end of the chock block (1801) is the same as the diameter of the water inlet pipe (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022592454.6U CN213495486U (en) | 2020-11-11 | 2020-11-11 | But self-cleaning's water tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022592454.6U CN213495486U (en) | 2020-11-11 | 2020-11-11 | But self-cleaning's water tank |
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| CN213495486U true CN213495486U (en) | 2021-06-22 |
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| CN202022592454.6U Active CN213495486U (en) | 2020-11-11 | 2020-11-11 | But self-cleaning's water tank |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113548283A (en) * | 2021-06-30 | 2021-10-26 | 利辛县众兴食品有限公司 | Pork bin with automatically cleaning equipment |
| CN113735357A (en) * | 2021-09-23 | 2021-12-03 | 济南上华科技有限公司 | Interlocking control cleaning water tank for treating high-salinity wastewater in coal chemical industry |
| CN113957948A (en) * | 2021-11-02 | 2022-01-21 | 曾秀云 | Secondary water supply system for waterproof hammer |
-
2020
- 2020-11-11 CN CN202022592454.6U patent/CN213495486U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113548283A (en) * | 2021-06-30 | 2021-10-26 | 利辛县众兴食品有限公司 | Pork bin with automatically cleaning equipment |
| CN113548283B (en) * | 2021-06-30 | 2023-09-22 | 利辛县众兴食品有限公司 | Pork bin with self-cleaning equipment |
| CN113735357A (en) * | 2021-09-23 | 2021-12-03 | 济南上华科技有限公司 | Interlocking control cleaning water tank for treating high-salinity wastewater in coal chemical industry |
| CN113957948A (en) * | 2021-11-02 | 2022-01-21 | 曾秀云 | Secondary water supply system for waterproof hammer |
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