CN212715290U - Sewage lifting device with backwashing function - Google Patents
Sewage lifting device with backwashing function Download PDFInfo
- Publication number
- CN212715290U CN212715290U CN202021434224.0U CN202021434224U CN212715290U CN 212715290 U CN212715290 U CN 212715290U CN 202021434224 U CN202021434224 U CN 202021434224U CN 212715290 U CN212715290 U CN 212715290U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- filter screen
- communicated
- liquid separator
- solid
- 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
Landscapes
- Sewage (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a sewage lifting device with back washing, which comprises a bracket, wherein a solid-liquid separator and a water collecting tank are arranged on the bracket, a connecting pipeline is communicated between the solid-liquid separator and the water collecting tank, and a water inlet pipe and a water outlet pipe are respectively communicated on the solid-liquid separator; the solid-liquid separator comprises a shell, a partition board is fixedly connected in the shell, a filter screen assembly is arranged on one side of the partition board, two sliding rods are arranged in the shell, the sliding rods penetrate through the filter screen assembly and are in sliding connection with the filter screen assembly, two ends of each sliding rod are fixedly connected to the shell and the partition board respectively, a driving device is fixedly connected to one side of the filter screen assembly, and the driving device penetrates through the partition board; a submersible pump is arranged in the water collecting tank, a water outlet pipeline of the submersible pump is communicated with a connecting pipeline, a back flushing pipeline is arranged on a water outlet pipeline of the submersible pump, and a drainage pipeline is communicated on the connecting pipeline. The utility model discloses make immersible pump impeller and header tank bottom silt realize the back flush, make the inside impurity of solid-liquid separator realize automatic clearly drawing, extension immersible pump life reduces intensity of labour.
Description
Technical Field
The utility model relates to a sewage treatment technical field especially relates to a take sewage hoisting device of back flush.
Background
The sewage lifting device is a system formed by a sewage pump, a water collecting tank, a control device and related pipe fittings and valves, and is used for lifting and conveying waste sewage lower than a sewer or far away from a municipal pipe network, so that the problems existing in the traditional water collecting pit can be effectively solved or avoided; the sewage lifting device with the sewage pump is generally arranged at the bottom in the water collecting tank positioned at the bottom of sewage water and used for discharging the sewage pumped into the water collecting tank, and along with the continuous inflow of the sewage, the more the sewage is accumulated at the bottom of the water collecting tank, namely the pump bottom. Especially, when the sewage lifting device is started again for sewage disposal after a period of shutdown, part of the sewage may be dried, the sewage cannot be discharged by the suction force of the pump alone, and operations such as backwashing, dilution and the like need to be performed first, so that the normal operation of the pump cannot be influenced. The existing sewage lifting device has the following defects: 1. the larger impurities in the solid-liquid separator can be deposited at the bottom of the solid-liquid separator, and the larger deposited impurities at the bottom of the solid-liquid separator cannot be completely conveyed to a municipal pipe network only by the hydraulic pressure of the submersible pump; 2. the back-washing water is also sewage from the water collecting tank and often contains larger impurities, so that sludge at the bottom of the water collecting tank and at the inlet of the sewage pump is accumulated after long-term use, the stability and the durability of the sewage lifting device can be reduced, and the manufacturing and maintenance cost of the sewage lifting device is increased; 3. after long-term use, the solid-liquid separator needs to be cleaned, so that the labor intensity is increased. Therefore, a sewage lifting device with backwashing is needed to be designed to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a take sewage hoisting device of back flush to solve the problem that above-mentioned prior art exists, make immersible pump impeller and header tank bottom silt realize the back flush, make the inside impurity of solid-liquid separator realize automatic clearly drawing, extension immersible pump life reduces intensity of labour.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a sewage lifting device with back washing, which comprises a bracket, wherein a solid-liquid separator and a water collecting tank are arranged on the bracket, a connecting pipeline is communicated between the solid-liquid separator and the water collecting tank, and a water inlet pipe and a water outlet pipe are respectively communicated on the solid-liquid separator;
the solid-liquid separator comprises a shell, a partition board is fixedly connected in the shell, a filter screen assembly is arranged on one side of the partition board, two slide bars are horizontally arranged on the upper side and the lower side of an inner cavity of the shell, the two slide bars penetrate through the filter screen assembly and are in sliding connection with the filter screen assembly, one ends of the slide bars penetrate through the partition board and are fixedly connected with the partition board, the other ends of the slide bars are fixedly connected on the shell, a driving device is arranged on one side, away from the filter screen assembly, of the partition board, the driving device penetrates through the partition board, and the driving device is fixedly connected with the filter screen;
the water collecting tank is internally provided with a submersible pump, a submersible pump water outlet pipeline is communicated with the connecting pipeline, a back flushing pipeline is arranged on the submersible pump water outlet pipeline, and the connecting pipeline is communicated with a drainage pipeline.
Preferably, the filter screen subassembly includes the filter screen, rigid coupling two sliding sleeves of filter screen, the sliding sleeve cup joint on the slide bar and with slide bar sliding connection.
Preferably, one side of the sliding sleeve fixedly connected with the bottom end of the filter screen is detachably connected with a scraper, and the scraper is arranged on one side, away from the partition plate, of the sliding sleeve.
Preferably, the driving device comprises an air cylinder, an air cylinder body is fixedly connected to the side wall of the shell, an air cylinder piston rod penetrates through the partition plate and is in sliding connection with the partition plate, and the air cylinder piston rod is fixedly connected with the filter screen.
Preferably, the air inlet and the air outlet of the air cylinder are respectively communicated with an air source.
Preferably, the back flush pipeline includes L shape pipeline and V-arrangement pipeline, be provided with first solenoid valve on the L shape pipeline, L shape pipeline delivery port with V-arrangement pipeline intercommunication, V-arrangement pipeline one end orientation submerged pump impeller department, the V-arrangement pipeline other end orientation the water catch bowl inner chamber bottom wall.
Preferably, the connecting pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline and the second pipeline are arranged up and down correspondingly, and the first pipeline, the second pipeline and the third pipeline are communicated with each other.
Preferably, the water inlet pipe and the water outlet pipe are respectively provided with a check valve.
Preferably, the water discharge pipeline is provided with a second electromagnetic valve.
Preferably, the first electromagnetic valve, the second electromagnetic valve, the air cylinder and the submersible pump are respectively and electrically connected with a control circuit.
The utility model discloses a following technological effect:
the utility model discloses a set up the baffle in solid-liquid separator, the slide bar, the sliding sleeve, filter screen and cylinder, promote the filter screen through the cylinder and drive the sliding sleeve and slide on the slide bar, realize scraping the great impurity of solid-liquid separator bottom, and finally scrape great impurity into the outlet pipe, cooperate the immersible pump to continuously extract the sewage in the header tank and strike the great impurity of filter screen one side when scraping great impurity, more be favorable to great impurity to get into in the outlet pipe, after great impurity gets into the outlet pipe, the immersible pump continues to draw water and suppresses, along with the rising of water pressure, finally carry great impurity whole to municipal pipe network, the work of following need artifical clear drawing impurity in the solid-liquid separator has been removed, intensity of labour is reduced;
through set up the back flush pipeline on immersible pump outlet pipe way to set up the solenoid valve on L-shaped pipeline, with the one end of V-shaped pipeline both ends department towards submersible pump impeller, with the other end of V-shaped pipeline both ends department towards the header tank bottom, can realize the washing to submersible pump impeller and header tank bottom when the back flush, make submersible pump impeller and header tank bottom not block up, prolonged the life of immersible pump, be favorable to continuously extracting the sewage in the header tank, improve work efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged view of a in fig. 1.
Wherein, 1 is the support, 2 is the casing, 3 is the header tank, 4 is the inlet tube, 5 is the outlet pipe, 6 is the baffle, 7 is the slide bar, 8 is the sliding sleeve, 9 is the filter screen, 10 is the cylinder, 11 is the air supply, 12 is first pipeline, 13 is the second pipeline, 14 is the third pipeline, 16 is the immersible pump, 18 is L shape pipeline, 19 is the V-arrangement pipeline, 20 is first solenoid valve, 21 is the drainage pipeline, 22 is the second solenoid valve, 23 is the check valve, 24 is the scraper.
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.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1-2, the utility model provides a sewage lifting device with back flush, which comprises a support 1, wherein a solid-liquid separator and a water collecting tank 3 are arranged on the support 1, a connecting pipeline is communicated between the solid-liquid separator and the water collecting tank 3, and the solid-liquid separator is respectively communicated with a water inlet pipe 4 and a water outlet pipe 5;
the solid-liquid separator comprises a shell 2, a partition plate 6 is fixedly connected in the shell 2, a filter screen 9 assembly is arranged on one side of the partition plate 6, two slide bars 7 are horizontally arranged on the upper side and the lower side of an inner cavity of the shell 2, the two slide bars 7 penetrate through the filter screen 9 assembly and are in sliding connection with the filter screen 9 assembly, one end of each slide bar 7 penetrates through the partition plate 6 and is fixedly connected with the partition plate 6, the other end of each slide bar 7 is fixedly connected to the shell 2, a driving device is arranged on one side, away from the filter screen 9 assembly, of the partition plate 6 and penetrates through the partition plate 6, and the driving device is fixedly connected with the filter screen 9 assembly;
a submersible pump 16 is arranged in the water collecting tank 3, an outlet pipeline of the submersible pump 16 is communicated with the connecting pipeline, a back flushing pipeline is arranged on an outlet pipeline of the submersible pump 16, and a drainage pipeline 21 is communicated with the connecting pipeline.
Further preferred scheme, filter screen 9 subassembly includes filter screen 9, rigid coupling two sliding sleeves 8 of filter screen 9, sliding sleeve 8 cup joints on the slide bar 7 and with slide bar 7 sliding connection, the cylinder promotes filter screen 9, and filter screen 9 drives sliding sleeve 8 and slides on slide bar 7 to the realization is carried the great impurity on one side of filter screen 9 in outlet pipe 5.
Further preferred scheme, 8 one sides of sliding sleeve of filter screen 9 bottom rigid coupling can be dismantled and be connected with scraper 24, scraper 24 sets up and keeps away from at sliding sleeve 8 one side of baffle 6, scraper 24 can be more easily will bond the great impurity scraping in solid-liquid separator bottom.
In a further preferred scheme, the driving device comprises an air cylinder 10, the cylinder body of the air cylinder 10 is fixedly connected to the side wall of the shell 2, the piston rod of the air cylinder 10 penetrates through the partition plate 6 and is in sliding connection with the partition plate 6, and the piston rod of the air cylinder 10 is fixedly connected with the filter screen 9.
In a further preferable scheme, an air inlet and an air outlet of the air cylinder 10 are respectively communicated with an air source 11.
Further preferred scheme, the back flush pipeline includes L shape pipeline 18 and V-arrangement pipeline 19, be provided with first solenoid valve 20 on the L shape pipeline 18, L shape pipeline 18 delivery port with V-arrangement pipeline 19 intercommunication, the one end of V-arrangement pipeline 19 bi-polar mouth is towards 16 impellers of immersible pump department, the other end of V-arrangement pipeline 19 bi-polar mouth is towards the water catch tank 3 inner chamber bottom wall.
In a further preferred scheme, the connecting pipeline comprises a first pipeline 12, a second pipeline 13 and a third pipeline 14, the first pipeline 12 and the second pipeline 13 are arranged up and down correspondingly, the first pipeline 12, the second pipeline 13 and the third pipeline 14 are communicated with each other, the third pipeline 14 penetrates through the water collecting tank and is communicated with a water outlet pipe of the submersible pump, and the first pipeline 12 and the second pipeline 13 penetrate through the side wall of the solid-liquid separator and further penetrate through the partition plate 6.
In a further preferred scheme, check valves 23 are respectively arranged on the water inlet pipe 4 and the water outlet pipe 5.
Further preferably, a second electromagnetic valve 22 is disposed on the drain line 21.
In a further preferred embodiment, the first electromagnetic valve 20, the second electromagnetic valve 22, the cylinder 10 and the submersible pump 16 are respectively electrically connected to a control circuit, the control circuit is a PLC controller, and the connection manner between the PLC controller and the first electromagnetic valve 20, the second electromagnetic valve 22, the cylinder 10 and the submersible pump 16 is common knowledge of those skilled in the art and is not described herein again.
The utility model relates to a take sewage hoisting device of back flush's theory of operation:
opening a check valve 23 of a water inlet pipe 4, closing a check valve 23 of a water outlet pipe 5, naturally flowing sewage into a solid-liquid separator through the water inlet pipe 4, retaining larger impurities on one side of a filter screen 9 under the action of the filter screen 9, allowing the filtered sewage to enter a space formed by the filter screen 9 and a partition plate 6, allowing the filtered sewage to flow into a water collecting tank 3 by controlling a second electromagnetic valve 22 to be opened through a control circuit and realizing the collection of the sewage as a first pipeline 12 and a second pipeline 13 are communicated with the partition plate, allowing the filtered sewage to be gathered into a third pipeline 14 through the first pipeline 12 and the second pipeline 13 and enter a water drainage pipeline 21, closing the check valve 23 of the water inlet pipe 4 after the sewage is fully collected, opening the check valve 23 of the water outlet pipe 5, closing the second electromagnetic valve 22 through the control circuit, and simultaneously opening the first electromagnetic valve 20 and a submersible pump 16 to allow an L-shaped pipeline 18 to form a passage, after the submersible pump 16 extracts sewage in the water collecting tank 3, one part of the sewage is conveyed to the first pipeline 12 and the second pipeline 13 through the third pipeline 14 and then conveyed to a position between the separation plate and the filter screen 9 and impacts the filter screen 9, the other part of the sewage is conveyed to the V-shaped pipeline 19 through the L-shaped pipeline 18, sludge at the impeller of the submersible pump 16 and at the bottom of the water collecting tank 3 is washed through the V-shaped pipeline 19, the sludge at the impeller of the submersible pump 16 and at the bottom of the water collecting tank 3 is cleaned, after the backwashing is carried out for a period of time, the first electromagnetic valve 20 is closed through the control circuit to enable the L-shaped pipeline 18 to form an open circuit, when the submersible pump 16 continuously extracts sewage and conveys the sewage to the first pipeline 12 and the second pipeline 13, the piston rod of the cylinder 10 is controlled to extend through the control circuit, so that the filter screen 9 is driven to move along the direction of the, because the sliding sleeve 8 at the bottom end of the filter screen 9 is detachably connected with the scraper 24, larger impurities adhered to the bottom of the solid-liquid separator can be scraped more easily and move to the water outlet pipe 5 along with the filter screen 9, the first pipeline 12 and the second pipeline 13 can continuously impact the sewage extracted by the submersible pump 16 on the impurities on one side of the filter screen 9 while the filter screen 9 pushes the larger impurities, the conveying of the larger impurities is assisted, and the submersible pump 16 continuously extracts the sewage in the water collecting tank 3 because the first electromagnetic valve 20 is closed and the L-shaped pipeline 18 forms a short circuit, so that the pressure in the solid-liquid separator is continuously increased, and the larger impurities conveyed in the water outlet pipe 5 are finally conveyed to a municipal pipe network, thereby realizing the cleaning work of the larger impurities in the solid-liquid separator and the back flushing work of sludge at the impeller and the bottom of the water collecting tank 3 of the submersible pump 16, the labor intensity is reduced.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.
Claims (10)
1. The utility model provides a take sewage hoisting device of back flush which characterized in that: the device comprises a support (1), wherein a solid-liquid separator and a water collecting tank (3) are arranged on the support (1), a connecting pipeline is communicated between the solid-liquid separator and the water collecting tank (3), and a water inlet pipe (4) and a water outlet pipe (5) are respectively communicated on the solid-liquid separator;
the solid-liquid separator comprises a shell (2), a partition plate (6) is fixedly connected in the shell (2), a filter screen assembly is arranged on one side of the partition plate (6), two slide rods (7) are horizontally arranged on the upper side and the lower side of an inner cavity of the shell (2), the two slide rods (7) penetrate through the filter screen assembly and are in sliding connection with the filter screen assembly, one end of each slide rod (7) penetrates through the partition plate (6) and is fixedly connected with the partition plate (6), the other end of each slide rod (7) is fixedly connected to the shell (2), a driving device is arranged on one side, far away from the filter screen assembly, of the partition plate (6), the driving device penetrates through the partition plate (6), and the driving device is fixedly connected with the filter screen assembly;
the water collecting tank (3) is internally provided with a submersible pump (16), a water outlet pipeline of the submersible pump (16) is communicated with the connecting pipeline, a back flushing pipeline is arranged on the water outlet pipeline of the submersible pump (16), and the connecting pipeline is communicated with a drainage pipeline (21).
2. The sewage lifting device with backwashing according to claim 1, wherein: the filter screen assembly comprises a filter screen (9) and two sliding sleeves (8) fixedly connected with the filter screen (9), wherein the sliding sleeves (8) are sleeved on the sliding rod (7) and are in sliding connection with the sliding rod (7).
3. The sewage lifting device with backwashing according to claim 2, wherein: sliding sleeve (8) one side of filter screen (9) bottom rigid coupling can be dismantled and be connected with scraper (24), scraper (24) set up sliding sleeve (8) are kept away from one side of baffle (6).
4. The sewage lifting device with backwashing according to claim 2, wherein: the driving device comprises a cylinder (10), the cylinder body of the cylinder (10) is fixedly connected with the side wall of the shell (2), a piston rod of the cylinder (10) penetrates through the partition board (6) and is in sliding connection with the partition board (6), and the piston rod of the cylinder (10) is fixedly connected with the filter screen (9).
5. The sewage lifting device with backwashing according to claim 4, wherein: the air inlet and the air outlet of the air cylinder (10) are respectively communicated with an air source (11).
6. The sewage lifting device with backwashing according to claim 4, wherein: the backwashing pipeline comprises an L-shaped pipeline (18) and a V-shaped pipeline (19), a first electromagnetic valve (20) is arranged on the L-shaped pipeline (18), a water outlet of the L-shaped pipeline (18) is communicated with the V-shaped pipeline (19), one end of the double-opening end of the V-shaped pipeline (19) faces to the impeller of the submersible pump (16), and the other end of the double-opening end of the V-shaped pipeline (19) faces to the bottom wall of the inner cavity of the water collecting tank (3).
7. The sewage lifting device with backwashing according to claim 1, wherein: the connecting pipeline comprises a first pipeline (12), a second pipeline (13) and a third pipeline (14), the first pipeline (12) and the second pipeline (13) are arranged in a vertically corresponding mode, and the first pipeline (12), the second pipeline (13) and the third pipeline (14) are communicated with each other.
8. The sewage lifting device with backwashing according to claim 1, wherein: and check valves (23) are respectively arranged on the water inlet pipe (4) and the water outlet pipe (5).
9. The sewage lifting device with backwashing according to claim 6, wherein: and a second electromagnetic valve (22) is arranged on the drainage pipeline (21).
10. The sewage lifting device with backwashing according to claim 9, wherein: the first electromagnetic valve (20), the second electromagnetic valve (22), the air cylinder (10) and the submersible pump (16) are respectively and electrically connected with a control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021434224.0U CN212715290U (en) | 2020-07-20 | 2020-07-20 | Sewage lifting device with backwashing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021434224.0U CN212715290U (en) | 2020-07-20 | 2020-07-20 | Sewage lifting device with backwashing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212715290U true CN212715290U (en) | 2021-03-16 |
Family
ID=74907052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021434224.0U Active CN212715290U (en) | 2020-07-20 | 2020-07-20 | Sewage lifting device with backwashing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212715290U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123437A (en) * | 2021-04-25 | 2021-07-16 | 洁禹通河北环保设备有限公司 | Take airtight hoisting device of sewage of back flush of preliminary treatment |
-
2020
- 2020-07-20 CN CN202021434224.0U patent/CN212715290U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123437A (en) * | 2021-04-25 | 2021-07-16 | 洁禹通河北环保设备有限公司 | Take airtight hoisting device of sewage of back flush of preliminary treatment |
| CN113123437B (en) * | 2021-04-25 | 2023-01-31 | 北京洁禹通环保科技有限公司 | Take airtight hoisting device of sewage of back flush of preliminary treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208340293U (en) | A kind of sewage treatment separate tank | |
| CN107569876B (en) | For the settler handled the small particle sediment in sewage | |
| CN212715290U (en) | Sewage lifting device with backwashing function | |
| CN110604971B (en) | Sediment device is arranged before intelligent sewage pump | |
| CN212001543U (en) | Based on prefabricated for pump station blowdown circulation system of integration | |
| CN214809133U (en) | Pump station for urban water supply and drainage | |
| CN214271685U (en) | Drainage device for bridge | |
| CN109663410A (en) | A kind of mud abatement system and method that removable silting is intelligently cleaned | |
| CN210480968U (en) | MBR membrane bioreactor integration equipment | |
| CN211462381U (en) | Flushing device of grating dirt remover | |
| CN217204579U (en) | Prefabricated pump station of high-efficient type stainless steel | |
| CN216497990U (en) | Rainwater collecting and recycling system | |
| CN212039256U (en) | Long shaft pump filter for oil field oil unloading pool | |
| CN215888543U (en) | Self-cleaning sewage lifting machine | |
| CN220237870U (en) | Automatic clearance formula pipeline dirt remover | |
| CN210543684U (en) | Impurity filtering and separating device in liquid | |
| CN220666332U (en) | River channel dredging device | |
| CN216062351U (en) | Filtering device for fish pond for removing solid suspended matters | |
| CN211987230U (en) | Desilting device of primary sedimentation tank | |
| CN219058621U (en) | Oil-water separation equipment | |
| CN216038704U (en) | Bury formula sewage treatment device integratedly | |
| CN112627138B (en) | Filtration formula guiding device for water conservancy construction convenient to clearance | |
| CN214719052U (en) | Descaling circulating pipe for reduction denitration | |
| CN219848541U (en) | Industrial wastewater regulating tank | |
| CN217632968U (en) | Sewage pump and clean water pump combined self-cleaning sewage pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |