CN211100631U - Greasy dirt belt cleaning device in vertical storage tank - Google Patents
Greasy dirt belt cleaning device in vertical storage tank Download PDFInfo
- Publication number
- CN211100631U CN211100631U CN201921610694.5U CN201921610694U CN211100631U CN 211100631 U CN211100631 U CN 211100631U CN 201921610694 U CN201921610694 U CN 201921610694U CN 211100631 U CN211100631 U CN 211100631U
- Authority
- CN
- China
- Prior art keywords
- breaking hammer
- tank
- push shovel
- motor
- hammer
- 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.)
- Active
Links
Images
Abstract
A device for cleaning oil stain in a vertical storage tank. The device comprises a bottom plate, a stirrer motor, a storage oil tank, an upper support, a track, a pan-tilt control system, a high-pressure water gun, a mechanical push shovel, a breaking hammer, a sewage delivery pipe, a sewage pump motor, a water inlet pipe, an infrared explosion-proof camera, a sewage pump inlet pipe, an explosion-proof illuminating lamp, a storage battery and a sewage discharge pipe, wherein the sizes of all the parts are smaller than that of a manhole of the vertical storage tank, so that the parts can be assembled into a whole after entering the vertical storage tank from the manhole respectively; the slope of a push shovel groove of the mechanical push shovel is 5 degrees, and the push shovel groove is connected with a push shovel absorption port; the breaking hammer motor drives the hammer body to rotate; the breaking hammer is positioned at the front end of the device, the lowest height of the breaking hammer is 5 mm away from the bottom of the tank, and the breaking hammer is positioned at the front end of the mechanical push shovel. The utility model discloses with the set of many equipment on a device, adopt the cleaning mode that high-pressure thermokalite water jet and quartering hammer combined together, the clearance is effectual, and the cleaning efficiency increases substantially than traditional cleaning means.
Description
Technical Field
The utility model relates to a device for cleaning oil stains in vertical storage tank.
Background
Crude oil is a complex mixture of constituents, the basic parts of which are paraffins, naphthenes and aromatics, in addition to non-hydrocarbon colloids and asphaltenes. In the process of standing for a long time in the tank, the heavy components in the crude oil can change the saturation of each component in the tank under the comprehensive action of gravity, temperature and pressure, finally, a certain amount of sediments are formed at the bottom of the tank, the storage space is reduced, and the oil product is reduced. Therefore, the crude oil storage tanks require periodic inspection and maintenance and cleaning of the sludge in the tanks. In order to maintain high production efficiency, the storage tank needs to be cleaned timely and effectively. The existing cleaning mode comprises manual tank entering cleaning and high-pressure water gun cleaning outside the tank. In the former mode, the labor intensity of workers is too high, and in the latter mode, the workers are difficult to clean.
Disclosure of Invention
In order to solve the technical problem who mentions among the background art, the utility model provides an greasy dirt belt cleaning device in vertical storage tank utilizes the device to adopt mechanized washing, with the set of many equipment on a device, adopts the cleaning mode that high-pressure thermokalite water jet and quartering hammer combined together, and the clearance is effectual, and the cleaning efficiency increases substantially than traditional cleaning means. In addition, the mechanical push shovel part in the device combines the suction inlet of the dust collector with the common push shovel, so that the cleaning efficiency can be improved, and a sewage pump in work has a certain protection effect. Operating personnel accessible camera to the in-tank operation condition, to track advancing speed with turn to, high-pressure hot alkali water jet velocity of flow etc. control, greatly improved workman's operational environment.
The technical scheme of the utility model is that: this kind of greasy dirt belt cleaning device in vertical storage tank, including bottom plate, agitator motor 1, storage oil drum 2, upper bracket 3, track 4, cloud platform control system 5, high-pressure squirt 6, machinery is pushed away shovel 7, quartering hammer 8, send dirty pipe 9, pump 10, pump motor 11, inlet tube 12, infrared explosion-proof camera 13, pump intake pipe 14, explosion-proof light 15, battery 16 and blow off pipe 17, its characterized in that:
the device comprises a stirrer motor 1, a storage oil tank 2, an upper bracket 3, a track 4, a pan-tilt control system 5, a high-pressure water gun 6, a mechanical push shovel 7, a breaking hammer 8, a sewage delivery pipe 9, a sewage pumping pump 10, a sewage pumping pump motor 11, a water inlet pipe 12, an infrared explosion-proof camera 13, a sewage pumping pump inlet pipe 14, an explosion-proof illuminating lamp 15, a storage battery 16 and a sewage discharge pipe 17, wherein the sizes of the inlet pipe, the outlet pipe, the storage battery 16 and the sewage discharge pipe 17 are smaller than that of a manhole of the vertical storage tank, so that the manhole can be respectively assembled into;
the upper bracket mainly comprises an upper bracket support 301, a sewage delivery pipe port 302, a line port 303 and an upper bracket antifouling plate 304;
the mechanical push shovel is provided with a push shovel suction closing port 701 and a push shovel groove 702; the slope of the push shovel groove is 5 degrees so as to reduce stress concentration at the joint; the push shovel groove 702 is connected with the push shovel suction port 701;
the storage oil drum comprises a drum body, a stirrer motor base 201, a stirrer supporting frame 202, a stirrer 203, a layered partition plate 204, layered partition plate sieve holes 205 and a vortex-proof groove 206; the storage oil barrel is placed behind the device and used for collecting absorbed oil sludge, and the oil sludge is pumped into the barrel through the sewage pumping pump; the barrel body is divided into two layers, and a layering clapboard sieve hole 205 is arranged on a layering clapboard 204, so that the pumped mud-water mixture is driven by a stirrer motor 1 to realize the separation of solid oil sludge and water; the stirrer and the stirrer motor are arranged on a stirrer motor base 201 of the stirrer support; a cleaning port is arranged on the side surface of the barrel body;
the crawler belts are divided into a left crawler belt and a right crawler belt which are both rubber crawler belts; each of which has a track attachment groove 401 and a track non-slip protrusion 402 thereon; the bottom plate is directly inserted into the track connecting groove in the installation process, so that simple and quick installation can be realized; the track antiskid protrusions are used for increasing friction force;
the breaking hammer comprises a hammer body with a breaking hammer protrusion 804, a breaking hammer support connecting hole 801, a breaking hammer motor 802 and a breaking hammer support 803, wherein the breaking hammer motor 802 drives the hammer body to rotate; the breaking hammer is positioned at the front end of the device, the lowest height of the breaking hammer is set to be 5 mm away from the bottom of the tank, and the breaking hammer support is used for supporting the breaking hammer and a breaking hammer motor so as to prevent the breaking hammer from being in direct contact with the bottom of the tank to damage the bottom of the tank; the breaking hammer is positioned at the front end of the mechanical push shovel 7;
the high-pressure water gun 6 is used for spraying high-pressure hot-alkali water, and a water inlet of the high-pressure water gun 6 is connected with the water inlet pipe 12; a gas detector is arranged in the holder control system 5 and is used for monitoring the oxygen concentration in the tank at any time; the outlet end of the mechanical push shovel 7 is connected with an inlet pipe 14 of a sewage pumping pump, and a sewage conveying pipe 9 of the sewage pumping pump 10 is connected to the storage oil drum 2; the water outlet of the storage oil drum 2 is connected with the water discharge pipe 17.
The utility model discloses following beneficial effect has: the utility model discloses a modular design can be through the manhole around the operation with each part of device send into and transport out in the storage tank, install fast and dismantle by the workman in the jar, saved operating time. Meanwhile, a cleaning mode combining a high-pressure hot alkaline water jet and a breaking hammer is adopted in the cleaning process, the high-pressure hot alkaline water jet is connected to the part to be cleaned from the outside of the tank for melting and diluting, and the breaking hammer starts to operate to further break the residual hard sludge blocks in the oil sludge. The suction inlet of the dust collector is combined with the collecting part of the mechanical push shovel, the device walks forwards when the device starts to work, and oil sludge water is collected into the oil drum under the action of inertia force and the sewage suction pump. After the oily sludge is collected to the storage oil barrel, the stirrer in the storage oil barrel starts to work, the oily sludge passes through the screen to realize simple solid-liquid separation, and the screen is prevented from being blocked by the stirrer. And discharging the filtered liquid through a pipeline, and continuously dissolving and diluting the residual oil sludge. When the solid in the storage oil drum reaches the predetermined height, the staff outside the tank can walk to manhole department at the control device, and the change of storing the oil drum is located at the manhole, so that the effect of cleaning the oil sludge in the tank is achieved. In the operation process of the device, the cradle head control system monitors the working condition in the tank in real time, and the workers can correspondingly regulate and control the tank.
The utility model discloses with shower nozzle, recovery oil tank and the suction pipeline set among the COWS cleaning system in a vertical storage tank greasy dirt belt cleaning device, furthest outstanding technical cost is low, the construction is swift, the effectual advantage of construction, really accomplish economy and convenience. The COWS cleaning system relates to a spare oil storage tank and a large amount of pure crude oil in the cleaning process, the crude oil is polluted after being cleaned and needs to be purified again, and the phenomenon of great resource waste exists. The vertical oil stain cleaning device for the storage tank adopts high-pressure hot alkali water jet to wash solid oil sludge at the bottom of the tank, so that not only is the consumption of crude oil avoided, but also the cleaning effect is good, and the cleaning efficiency is high. An operator observes the cleaning condition in the tank and controls the operation of the cleaning device through remote monitoring outside the tank, and the working environment of the operator is greatly improved. The suction port is combined with the push shovel by referring to the shape of the suction port of the dust collector, so that the absorption efficiency is improved, the sewage pumping pump can be protected, and the air-bound phenomenon of the pump is prevented.
Description of the drawings:
fig. 1 is a schematic diagram of the three-dimensional structure of the present invention.
Fig. 2 is a schematic diagram of the left three-dimensional structure of the present invention.
Fig. 3 is a right three-dimensional structure diagram of the present invention.
Fig. 4 is a schematic structural view of the mechanical push shovel of the present invention.
Figure 5 is the utility model discloses a store the inner structure schematic diagram of oil drum.
Figure 6 is the utility model discloses a store the external structure schematic diagram of oil drum.
Fig. 7 is a schematic structural view of the crawler of the present invention.
Fig. 8 is a schematic structural view of the breaking hammer of the present invention.
Fig. 9 is a schematic structural view of the upper bracket of the present invention.
Figure 10 is a schematic view of the installation of the track and part of the assembly of the present invention.
Fig. 11 is a schematic diagram of the dilution crushing process of the present invention.
Fig. 12 is a schematic diagram of the process of the present invention for collecting and filtering.
In the figure, 1-a stirrer motor, 2-a storage oil drum, 3-an upper bracket, 4-a crawler belt, 5-a pan-tilt control system, 6-a high-pressure water gun, 7-a mechanical push shovel, 8-a breaking hammer, 9-a sewage conveying pipe, 10-a sewage pumping pump, 11-a sewage pumping pump motor, 12-a water inlet pipe, 13-an infrared explosion-proof camera, 14-a sewage pumping pump inlet pipe, 15-an explosion-proof illuminating lamp, 16-a storage battery and 17-a sewage draining pipe.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
this kind of device is as shown in fig. 1, fig. 2, fig. 3, this belt cleaning device includes agitator motor 1, store oil drum 2, upper bracket 3, track 4, cloud platform control system 5, high-pressure squirt 6, machinery pushes away shovel 7, quartering hammer 8, send dirty pipe 9, pump 10, pump motor 11, inlet tube 12, infrared explosion-proof camera 13, pump import pipe 14, explosion-proof light 15, battery 16, blow off pipe 17, its unique part lies in:
as shown in fig. 4, the mechanical pushing shovel mainly comprises 701 mechanical pushing shovel suction port and a pushing shovel groove 702. The current shovel that pushes away only can realize the separation to solid fatlute and tank bottoms, and the walking in-process produces great stress at the junction, and this design has proposed a new machinery and has pushed away shovel structure, and the machinery of design pushes away the shovel through pushing away the shovel groove, realizes only having the slope of 5 degrees with the tank bottoms face, reduces the stress concentration of junction. In addition, the mechanical push shovel of this design will push away the shovel and combine together with absorbing the mouth, improves substantially the absorption rate of working area and muddy water mixture. The water inlet of the pump in the device is further away from the bottom of the pump by a certain distance, and in the process of pumping water, gas is easy to enter due to uneven liquid level, so that gas is bound, and the pump is greatly damaged. The mechanical pushing shovel suction port is designed according to the structure of the dust collector, and the problem is well solved by combining the mechanical pushing shovel suction port with the pushing shovel.
The oil storage barrel in fig. 5 and 6 mainly comprises a stirrer motor 201, a stirrer support frame 202, a stirrer 203, a layered partition 204, a layered partition sieve hole 205 and a vortex-proof groove 206. The storage oil barrel is placed behind the device, and its main function is to collect absorptive sludge, pumps sludge to the bucket in through taking out dirty pump. The interior of the barrel is divided into two layers, sieve pores are arranged on the layered partition plate, so that the pumped mud-water mixture is driven by the stirrer motor to realize the separation of solid oil sludge and water, and the stirrer motor are arranged on the stirrer support. The side of the barrel is provided with a cleaning opening. When the oil drum is transported to a manhole by the trolley, the oil drum is lifted out through the suspension arm, and collected oil sludge is discharged in time.
The track in fig. 7 is mainly composed of track connecting grooves 401 and track anti-slip protrusions 402. The bottom plate is directly inserted into the connecting groove of the crawler belt in the installation process, so that simple and quick installation can be realized. The presence of the track cleats increases friction. The whole crawler belt consists of a left crawler belt and a right crawler belt, and the rubber crawler belt has the characteristics of oil resistance, low noise, small vibration, large traction force, small ground pressure, no damage to an oil tank and the like.
The breaking hammer in fig. 8 is mainly composed of a breaking hammer support connecting hole 801, a breaking hammer motor 802, a breaking hammer support 803 and a breaking hammer protrusion 804. The quartering hammer structure sets for about its minimum height apart from the tank bottoms five millimeters at the device front end, and the quartering hammer support supports quartering hammer and quartering hammer motor, avoids with tank bottoms direct contact, causes tank bottoms destruction. In the cleaning process, the breaking hammer is driven by the breaking hammer motor to rotate, and the surface breaking hammer protrusion breaks oil sludge at the bottom of the storage tank. The high-pressure hot alkaline water sprayed by the high-pressure water gun is integrated, the broken and diluted oil sludge is loosened, the viscosity is greatly reduced, and the cleaning is convenient.
The upper rack in fig. 9 is mainly composed of an upper rack support 301, a sewage delivery pipe port 302, a line port 303, and an upper rack antifouling plate 304. The space of device is rationally arranged to the existence of upper bracket, and the antifouling board of upper bracket can avoid device inner structure to suffer sludge contamination.
All the structures can enter the storage tank through a manhole, and the storage tank can be quickly installed and detached by an operator. After the device is installed to fig. 1, 2 and 3, the operator leaves the tank and introduces shielding gas into the tank. The holder control system 5 is provided with a gas detector for constantly monitoring the oxygen concentration and the like in the tank, and when the oxygen concentration in the storage tank is reduced to a safe range, the protection gas is stopped to be introduced into the tank. After the device is started, the high-pressure water gun 6 sprays high-pressure hot alkaline water to a position to be cleaned, the hot alkaline water at 40 ℃ is adopted to carry out primary melting on the oil sludge, most of the melted and diluted oil sludge is oil sludge water with stronger fluidity and smaller viscosity, and a small amount of hard oil sludge blocks are still treated by the breaking hammer. The motor of the breaking hammer 802 drives the breaking hammer 8 to rotate, the breaking hammer protrusions 804 in the breaking hammer 8 can effectively break solid oil sludge, the loosened oil sludge after breaking and dilution and the viscosity of the oil sludge are greatly reduced, cleaning is facilitated, and a better cleaning effect is achieved. Along with the rotation of the breaking hammer when the cleaning device moves forwards, under the action of inertia force and the sewage pump, oil sludge water flows to the mechanical push shovel 7, the mechanical push shovel 3 combines a suction inlet of a dust collector and a common push shovel, and due to the existence of the push shovel groove 702, the oil sludge at the bottom of the tank can be shoveled while stress concentration is avoided. The designed mechanical push shovel suction closing port 701 is low in height, and normal work of the sewage pumping pump under the working condition can be guaranteed. The water inlet of the existing pump is further away from the bottom of the pump by a certain distance, and in the process of pumping water, gas is easy to enter due to uneven liquid level, so that gas is bound, and the pump is greatly damaged. The mechanical pushing shovel designed by imitating the structure of the dust collector well solves the problem and greatly improves the working area and the absorption rate of the mud-water mixture. The oil sludge water enters an inlet pipe 14 of the sewage pumping pump through a mechanical push shovel 7, is pumped by the sewage pumping pump 10 to pass through a sewage conveying pipe 9 to the storage oil drum 2, and is subjected to preliminary solid-liquid separation. The stirrer 203 and the stirrer motor 201 in the storage oil barrel 2 are fixed through the stirrer bracket 202. A layered partition plate sieve hole 205 is formed in a layered partition plate 204 in the barrel, and the stirrer is driven by a stirrer motor to perform a stirring function, so that solid oil sludge in a sleep mixture is prevented from blocking the sieve hole of the layered partition plate. The solids of the stirring couple are still left in the barrel, and the liquid is discharged through a drain pipe 17 to continuously melt the residual oil sludge in the dilution tank. The side of the barrel is provided with a cleaning opening. When the oil drum is conveyed to a manhole by the trolley, the oil drum is lifted out through the suspension arm, collected oil sludge is timely discharged, and the oil sludge in the storage tank is cleaned up through the circulating work.
The device configuration parameters determined in one embodiment are given below in table 1.
TABLE 1 structural parameters
TABLE 1
Through calculation, the cleaning efficiency of the device is obviously improved compared with a COWS cleaning system. The calculation results are shown in Table 2.
TABLE 2 basic procedure required time
| Basic procedure | Numerical value |
| Selected volume V/m of storage tank3 | 50000 |
| Working area per unit time/m2 | 0.01 |
| Working time T in tank0 /h | 80 |
| Tank inlet installation time T1/ |
3 |
| Can discharging and disassembling time T2/ |
3 |
| Temperature of hot alkaline water C/. degree.C | 40 |
| Residence time T in tank3/ |
5 |
| Total time T/h | 91 |
Claims (1)
1. The utility model provides an greasy dirt belt cleaning device in vertical storage tank, includes bottom plate, agitator motor, stores the oil drum, upper bracket, track, cloud platform control system, high-pressure squirt, machinery push away shovel, quartering hammer, send dirty pipe, take out dirty pump motor, inlet tube, infrared explosion-proof camera, take out dirty pump import pipe, explosion-proof light, battery and blow off pipe, its characterized in that:
the sizes of the stirrer motor, the storage oil tank, the upper bracket, the crawler belt, the pan-tilt control system, the high-pressure water gun, the mechanical push shovel, the breaking hammer, the sewage conveying pipe, the sewage pumping pump motor, the water inlet pipe, the infrared explosion-proof camera, the sewage pumping pump inlet pipe, the explosion-proof illuminating lamp, the storage battery and the sewage discharge pipe are all smaller than that of a manhole of the vertical storage tank, so that the stirrer motor, the storage oil tank, the upper bracket, the crawler belt, the pan-tilt control system, the high;
the upper bracket mainly comprises an upper bracket support, a sewage delivery pipe orifice, a line orifice and an upper bracket antifouling plate;
the mechanical push shovel is provided with a push shovel suction closing end and a push shovel groove; the slope of the push shovel groove is 5 degrees so as to reduce stress concentration at the joint; the push shovel groove is connected with the push shovel absorption port;
the storage oil drum comprises a drum body, a stirrer motor base, a stirrer supporting frame, a stirrer, a layering partition plate sieve mesh and a vortex-proof groove; the storage oil barrel is placed behind the device and used for collecting absorbed oil sludge, and the oil sludge is pumped into the barrel through the sewage pumping pump; the barrel body is divided into two layers, and a layering clapboard sieve hole is arranged on the layering clapboard, so that the pumped mud-water mixture is driven by a stirrer motor to realize the separation of solid oil sludge and water; the stirrer and the stirrer motor are arranged on a stirrer motor base of the stirrer support; a cleaning port is arranged on the side surface of the barrel body;
the crawler belts are divided into a left crawler belt and a right crawler belt which are both rubber crawler belts; each upper surface is provided with a track connecting groove and a track antiskid bulge; the bottom plate is directly inserted into the track connecting groove in the installation process, so that simple and quick installation can be realized; the track antiskid protrusions are used for increasing friction force;
the breaking hammer comprises a hammer body with a breaking hammer bulge, a breaking hammer support connecting hole, a breaking hammer motor and a breaking hammer support, wherein the breaking hammer motor drives the hammer body to rotate; the breaking hammer is positioned at the front end of the device, the lowest height of the breaking hammer is set to be 5 mm away from the bottom of the tank, and the breaking hammer support is used for supporting the breaking hammer and a breaking hammer motor so as to prevent the breaking hammer from being in direct contact with the bottom of the tank to damage the bottom of the tank; the breaking hammer is positioned at the front end of the mechanical push shovel;
the high-pressure water gun is used for spraying high-pressure hot alkaline water, and a water inlet of the high-pressure water gun is connected with the water inlet pipe; a gas detector is arranged in the holder control system and is used for monitoring the oxygen concentration in the tank at any time;
the outlet end of the mechanical push shovel is connected with an inlet pipe of a sewage pumping pump, and a sewage conveying pipe of the sewage pumping pump is connected to the storage oil drum; the water outlet of the oil storage barrel is connected with a water discharge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921610694.5U CN211100631U (en) | 2019-09-26 | 2019-09-26 | Greasy dirt belt cleaning device in vertical storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921610694.5U CN211100631U (en) | 2019-09-26 | 2019-09-26 | Greasy dirt belt cleaning device in vertical storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211100631U true CN211100631U (en) | 2020-07-28 |
Family
ID=71709893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921610694.5U Active CN211100631U (en) | 2019-09-26 | 2019-09-26 | Greasy dirt belt cleaning device in vertical storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211100631U (en) |
-
2019
- 2019-09-26 CN CN201921610694.5U patent/CN211100631U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213668135U (en) | Filter equipment for sewage treatment | |
| KR200475726Y1 (en) | Apparatus for washing a vehicle wheel | |
| CN112617687A (en) | Self-drawing water recycling system, cleaning equipment and self-moving equipment | |
| CN110695029A (en) | Greasy dirt belt cleaning device in vertical storage tank | |
| CN211100631U (en) | Greasy dirt belt cleaning device in vertical storage tank | |
| CN203737643U (en) | Automatic cleaning device for tamping device | |
| CN212577111U (en) | Dust device is used in building site construction | |
| KR101093207B1 (en) | Apparatus for purifying waste water in the manhole | |
| CN110898486A (en) | Negative pressure type chip-liquid separator | |
| CN217233557U (en) | Colliery ventilation unit with filtering capability | |
| CN211254084U (en) | Dust removal scraper conveyor for mine | |
| KR20050052851A (en) | Cleaning apparatus in tunnel | |
| KR200345658Y1 (en) | A soil purifying and recovering apparatus | |
| CN110339627A (en) | A kind of automatic dredging system of spraying and dedusting water tank | |
| KR20100021331A (en) | Apparatus for separating a floating from recyclable aggregate | |
| CN105290007A (en) | Gearbox washing system with washing brush | |
| KR200342401Y1 (en) | cleaning apparatus in tunnel | |
| CN212523512U (en) | Mining of environmental protection in mineral engineering field is with quick recovery plant of smoke and dust | |
| CN218716961U (en) | A dust keeper for mining environment in mine | |
| JP2015038453A (en) | High-pressure washing system | |
| CN212759161U (en) | Slag discharging device of centrifugal machine | |
| CN208786661U (en) | A kind of light materials separator in building waste | |
| CN214783076U (en) | Recovery unit is smashed with abandonment pitch to municipal administration highway construction | |
| CN220091674U (en) | Impurity treatment mechanism of ore washer | |
| CN219518048U (en) | Sewage recovery device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |