CN218712863U - Vacuum preloading continuous drainage device with cleaning function - Google Patents
Vacuum preloading continuous drainage device with cleaning function Download PDFInfo
- Publication number
- CN218712863U CN218712863U CN202222682068.5U CN202222682068U CN218712863U CN 218712863 U CN218712863 U CN 218712863U CN 202222682068 U CN202222682068 U CN 202222682068U CN 218712863 U CN218712863 U CN 218712863U
- Authority
- CN
- China
- Prior art keywords
- pipe
- impurity removing
- edulcoration
- removing bin
- water
- 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
- 238000004140 cleaning Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 239000012535 impurity Substances 0.000 claims description 61
- 230000006698 induction Effects 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 239000002245 particle Substances 0.000 abstract description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 3
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 3
- 241001330002 Bambuseae Species 0.000 abstract description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 3
- 239000011425 bamboo Substances 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 11
- 239000004576 sand Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 239000002689 soil Substances 0.000 description 9
- 238000007664 blowing Methods 0.000 description 7
- 239000011148 porous material Substances 0.000 description 5
- 238000000605 extraction Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Landscapes
- Cleaning In General (AREA)
Abstract
The utility model provides a from vacuum preloading who takes cleaning function lasts drainage device, the device include the header tank, and the top of header tank is provided with the vacuum pump, and the play water side and the header tank intercommunication of vacuum pump, and the vacuum pump side of intaking is connected with the inlet tube, still includes the edulcoration subassembly, the edulcoration subassembly includes the edulcoration case, and is provided with first edulcoration storehouse and second edulcoration storehouse in the edulcoration incasement respectively, and the inner wall in first edulcoration storehouse and second edulcoration storehouse all is provided with strains a section of thick bamboo, the play water side in first edulcoration storehouse and second edulcoration storehouse is through deriving pipe fitting and water piping connection, the side of intaking in first edulcoration storehouse and second edulcoration storehouse is through leading-in pipe fitting and pre-buried union coupling. This drainage device prevents through two independent edulcoration casees that set up that silt particle in the aqueous vapor is inhaled the vacuum pump and leads to the excessive corrosive wear of equipment, the on-state of switching two edulcoration casees that also can be nimble to really realized carrying out continuous and efficient drainage effect to moisture in the soft base.
Description
Technical Field
The utility model relates to the technical field of drainage, especially, relate to a vacuum preloading of taking cleaning function lasts drainage device.
Background
The vacuum preloading soft foundation treatment is a foundation reinforcing method for forming a local negative pressure source in a soil body by utilizing a vacuumizing method, discharging pore water in the soil body by reducing the pore water pressure in a sand well or a drainage plate so as to increase effective stress to compact the soil body, firstly, arranging a plastic drainage plate on an original foundation as a vertical drainage body, then paving a sand cushion layer with a certain thickness on the surface of the foundation, paving a drainage filter pipe in the sand cushion layer, paving an airtight film on the sand cushion layer, and burying the periphery of the film into the soil; pumping out air in the sand cushion layer under the film through a drainage filter pipe embedded in the sand cushion layer; therefore, negative vacuum pressure is formed in the sand cushion layer and the drainage plate, a hole pressure difference is formed between the drainage plate and the surrounding soil body, pore water in the soil body seeps into the drainage plate under the action of the pressure difference and is discharged out of the soil body through the drainage filter pipe, so that the consolidation purpose is achieved, the vacuum preloading system consists of a vacuumizing system, a drainage and exhaust system and a sealing system, and the drainage smoothness and efficiency of the drainage device directly influence the effect of vacuum preloading soft foundation treatment.
Chinese patent publication No.: CN214883570U discloses a vacuum preloading soft foundation treatment integrated drainage device, which is provided with a large-volume water collection underground tank body, wherein a water collection chamber is arranged in the water collection underground tank body, a water inlet pipe communicated with the water collection chamber is arranged on the side wall of the water collection underground tank body, a drainage pump is arranged in the water collection chamber and is connected with an external drainage pipeline, a vacuumizing negative pressure tank is arranged at the top of the water collection underground tank body, a negative pressure cavity is arranged in the vacuumizing negative pressure tank and is communicated with the water collection chamber in the water collection underground tank body downwards, a water ring vacuum pump fixedly arranged at the top of the water collection underground tank body is arranged on one side of the vacuumizing negative pressure tank, an air extraction pipeline of the water ring vacuum pump is connected with the vacuumizing negative pressure tank and is communicated with the negative pressure cavity, and an air extraction check valve is arranged on the air extraction pipeline.
Foretell drainage device passes through the compound mode in proper order of vacuum pump, vacuum tube and water collecting tank for the cavity volume of vacuum pump negative pressure side is great, leads to the vacuum pump to need great vacuum suction just can inhale the catchment jar in with rivers, and lack the filtration edulcoration to vacuum intake's aqueous vapor mixture and handle, makes the silt granule in the intake aqueous vapor mixture cause the jam or corrode the phenomenon to the pipeline easily.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an adopt to set up two edulcoration storehouses that can switch over on-state in a flexible way on the inlet tube, carry out continuous not shut down filtration edulcoration treatment effect's a vacuum preloading from taking cleaning function to vacuum suction's aqueous vapor mixture and continue drainage device.
In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a from vacuum preloading who takes cleaning function lasts drainage device, includes the header tank:
a drain pipe is arranged at the bottom of the water collecting tank;
the top of the water collecting tank is provided with a vacuum pump, the water outlet side of the vacuum pump is communicated with the water collecting tank, and the water inlet side of the vacuum pump is connected with a water inlet pipe;
the device is characterized by also comprising an impurity removing component, wherein the impurity removing component comprises an impurity removing box, a first impurity removing bin and a second impurity removing bin are respectively arranged in the impurity removing box, and filter cylinders are respectively arranged on the inner walls of the first impurity removing bin and the second impurity removing bin;
the water outlet sides of the first impurity removing bin and the second impurity removing bin are connected with a water inlet pipe through a guide-out pipe fitting, and the water inlet sides of the first impurity removing bin and the second impurity removing bin are connected with a pre-buried pipe through a guide-in pipe fitting.
As a further description of the above technical solution:
the leading-in pipe fitting includes first induction pipe and the second induction pipe that is located first edulcoration storehouse and second edulcoration storehouse side of intaking respectively, connects through first three-way valve between first induction pipe and the second induction pipe.
As a further description of the above technical solution:
the guiding pipe fitting comprises a first guiding pipe and a second guiding pipe which are respectively positioned on water outlet sides of the first impurity removing bin and the second impurity removing bin, and the first guiding pipe and the second guiding pipe are connected through a second three-way valve.
As a further description of the above technical solution:
the device also comprises a recoil component;
the recoil assembly comprises a plunger pump arranged in the water collecting tank, a recoil pipe is connected to the water outlet side of the plunger pump, the recoil pipe is connected with the first recoil head and the second recoil head through a third three-way valve respectively, and the first recoil head and the second recoil head are connected and extend into the first impurity removing bin and the second impurity removing bin respectively.
As a further description of the above technical solution:
all be provided with the delivery pipe that extends to the edulcoration case outside on first induction pipe and the second induction pipe, and be provided with the solenoid valve on the delivery pipe.
As a further description of the above technical solution:
the inner wall of the water collecting tank is provided with an inclined filter plate, and the outer wall of the water collecting tank is provided with a drain pipe at the bottom of the inclined end of the filter plate.
As a further description of the above technical solution:
the end part of the water inlet pipe extending into the water collecting tank is provided with an inclined injection pipe, and the injection pipe is provided with an injection head.
As a further description of the above technical solution:
the end part of the water inlet pipe extending into the water collecting tank is provided with an inclined injection pipe, and the injection pipe is provided with an injection head.
In the technical scheme, the utility model provides a pair of from vacuum preloading of taking cleaning function lasts drainage device has following beneficial effect:
this drainage device is through two independent edulcoration storehouses that set up, can enough play filterable effect to the silt granule in the vacuum pump vacuum suction's aqueous vapor mixture, prevent that the silt granule in the aqueous vapor from being inhaled the vacuum pump and leading to the excessive erosive wear of equipment, the on-state of switching two edulcoration storehouses that also can be nimble simultaneously, another can keep the running state when guaranteeing a maintenance clearance, thereby need not drainage device and shut down the processing, and the jetting head of jetting pipe can realize self-cleaning to straining a section of thick bamboo to the recoil head of filter plate and recoil pipe, thereby really realized carrying out in succession and efficient drainage effect to moisture in the soft base.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed 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 described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic structural view of a vacuum preloading continuous drainage device with a cleaning function according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a joint of the impurity removing assembly and the backflushing assembly provided by the embodiment of the present invention.
Description of reference numerals:
1. a water collection tank; 2. a drain pipe; 3. a liquid level sensor; 4. a blow-off pipe; 5. filtering the plate; 6. a vacuum pump; 7. a water inlet pipe; 8. a one-way valve; 9. an impurity removal component; 91. an impurity removal box; 92. a first impurity removal bin; 93. a second impurity removal bin; 94. a filter cartridge; 95. a first introduction tube; 96. a first three-way valve; 97. a second introduction tube; 98. a first delivery pipe; 99. a second three-way valve; 910. a second delivery pipe; 911. a discharge pipe; 912. an electromagnetic valve; 10. pre-burying a pipe; 11. a connector; 12. a blowing head; 13. a blowing pipe; 14. a recoil assembly; 141. a plunger pump; 142. back flushing the pipe; 143. a third three-way valve; 144. a first counter punch; 145. a second counter punch.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the attached drawings.
Example 1: as shown in fig. 1-2, a vacuum preloading continuous drainage device with a cleaning function comprises a water collecting tank 1:
the bottom of the water collecting tank 1 is provided with a drain pipe 2, and the drain pipe 2 can be provided with an automatic control valve, so that water flow is discharged outwards when the water flow in the water collecting tank 1 is high;
the top of the water collecting tank 1 is provided with a vacuum pump 6, the water outlet side of the vacuum pump 6 is communicated with the water collecting tank 1, the water inlet side of the vacuum pump 6 is connected with a water inlet pipe 7, negative pressure suction is generated in the water inlet pipe 7 under the action of the vacuum pump 6, a local negative pressure source can be generated in the soft foundation soil, pore water in a soil body is discharged by reducing the pore water pressure in a sand well or a drainage plate, and the vacuum preloading drainage effect can be achieved on the soft foundation;
still include edulcoration subassembly 9, edulcoration subassembly 9 is including edulcoration case 91, and be provided with first edulcoration storehouse 92 and second edulcoration storehouse 93 in the edulcoration case 91 respectively, and the inner wall of first edulcoration storehouse 92 and second edulcoration storehouse 93 all is provided with and strains a section of thick bamboo 94, the play water side of first edulcoration storehouse 92 and second edulcoration storehouse 93 is connected with inlet tube 7 through deriving the pipe fitting, the side of intaking of first edulcoration storehouse 92 and second edulcoration storehouse 93 is connected with buried pipe 10 through leading-in pipe fitting, be provided with a plurality of connector 11 on the buried pipe 10, and connector 11 is connected with pre-buried sand-shaft or collector pipe in the soft base earth, realize the effect that the multiple spot is intake, leading-in pipe fitting can play the circulation pipeline switching effect to the aqueous vapor mixture that gets into first edulcoration storehouse 92 and second edulcoration storehouse 93 in buried pipe 10, and derive the leading-in pipe fitting cooperation leading-in pipe fitting and play the circulation pipeline switching effect to the aqueous vapor mixture that first edulcoration storehouse 92 and second edulcoration storehouse 93 go out, thereby it need not to carry out the continuous impurity removal water drainage processing device and the efficient to carry out impurity removal storehouse 92 in the impurity removal and the drain water when another impurity case, thereby the drain off the continuous drainage effect of first edulcoration storehouse 93, thereby the efficient is realized the first edulcoration storehouse 92 and the efficient.
The leading-in pipe fitting includes first induction pipe 95 and the second induction pipe 97 that is located first edulcoration storehouse 92 and the second edulcoration storehouse 93 side of intaking respectively, connects through first three-way valve 96 between first induction pipe 95 and the second induction pipe 97, under the control of first three-way valve 96, can be independent the state of switching on of control first induction pipe 95 and second induction pipe 97 for the aqueous vapor mixture that gets into in the pre-buried pipe 10 can get into respectively in first edulcoration storehouse 92 and the second edulcoration storehouse 93 and carry out the edulcoration processing.
The guiding pipe fitting comprises a first guiding pipe 98 and a second guiding pipe 910 which are respectively positioned on the water outlet sides of the first impurity removing bin 92 and the second impurity removing bin 93, the first guiding pipe 98 and the second guiding pipe 910 are connected through a second three-way valve 99, and the conducting states of the first guiding pipe 98 and the second guiding pipe 910 can be independently controlled under the control of the second three-way valve 99, so that the water-gas mixture flowing out of the first impurity removing bin 92 and the second impurity removing bin 93 can respectively enter the water inlet pipe 7 and flow into the outer water collecting tank 1.
The device further comprises a backflushing assembly 14, the backflushing assembly 14 comprises a plunger pump 141 arranged in the water collecting tank 1, a backflushing pipe 142 is connected to the water outlet side of the plunger pump 141, the backflushing pipe 142 is connected with a first backflushing head 144 and a second backflushing head 145 through a third three-way valve 143, and the first backflushing head 144 and the second backflushing head 145 are connected and extend into the first impurity removing bin 92 and the second impurity removing bin 93 respectively. When the filter cartridge 94 in the first impurity removing bin 92 or the second impurity removing bin 93 is blocked by silt particles, the conduction state of the first counter punch 144 and the second counter punch 145 is controlled by the third three-way valve 143, and at the moment, the purified water in the water collecting tank 1 is pumped into the counter-punch pipe 142 under the action of the plunger pump 141 and is respectively back-flushed into the first impurity removing bin 92 or the second impurity removing bin 93 at high pressure through the first counter punch 144 or the second counter punch 145, so that the effect of automatically cleaning the filter cartridge 94 can be achieved.
The first inlet pipe 95 and the second inlet pipe 97 are provided with discharge pipes 911 extending to the outer side of the impurity removing box 91, electromagnetic valves 912 are arranged on the discharge pipes 911, sand particles cleaned by back flushing on the filter cartridges 94 in the first impurity removing bin 92 or the second impurity removing bin 93 can fall into the first inlet pipe 95 and the second inlet pipe 97, the conduction states of the corresponding discharge pipes 911 on the first inlet pipe 95 and the second inlet pipe 97 can be controlled by opening the electromagnetic valves 912, and the sand particle impurities in the first inlet pipe 95 and the second inlet pipe 97 can be discharged outwards.
The inner wall of header tank 1 is provided with the filter plate 5 of slope, and the outer wall of header tank 1 and the slope end bottom that is located filter plate 5 are provided with blow off pipe 4, and the aqueous vapor mixture after silt particle impurity edulcoration is handled enters into header tank 1 to filter the aqueous vapor mixture once more via filter plate 5, clear up tiny particle impurity, and filter the impurity that gets off on the filter plate 5 and along the downward landing of filter plate 5, outwards discharge through blow off pipe 4 at last.
The end part of the water inlet pipe 7 extending into the water collecting tank 1 is provided with a blowing pipe 13 parallel to the filter plates 5, the blowing pipe 13 is provided with a blowing head 12, the water-air mixture in the water inlet pipe 7 can enter the blowing pipe 13 and is sprayed out through the blowing head 12 under high pressure, so that the impurities accumulated on the surface of the filter plates 5 can be automatically cleaned, and the filter plates 5 are ensured to be in a smooth state.
The inner wall of the water collecting tank 1 is provided with a liquid level sensor 3 below the filter plate 5, so that the water level in the water collecting tank 1 can be monitored in real time.
The downstream that lies in edulcoration case 91 on inlet tube 7 is provided with check valve 8, can prevent the rivers reflux in the inlet tube 7 in the edulcoration case 91 when vacuum pump 6 shut down.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the function and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (5)
1. The utility model provides a from vacuum preloading who takes cleaning function lasts drainage device, includes header tank (1), its characterized in that:
a drain pipe (2) is arranged at the bottom of the water collecting tank (1);
a vacuum pump (6) is arranged at the top of the water collecting tank (1), the water outlet side of the vacuum pump (6) is communicated with the water collecting tank (1), and the water inlet side of the vacuum pump (6) is connected with a water inlet pipe (7);
the device is characterized by further comprising an impurity removing component (9), wherein the impurity removing component (9) comprises an impurity removing box (91), a first impurity removing bin (92) and a second impurity removing bin (93) are respectively arranged in the impurity removing box (91), and filter cylinders (94) are respectively arranged on the inner walls of the first impurity removing bin (92) and the second impurity removing bin (93);
the water outlet sides of the first impurity removing bin (92) and the second impurity removing bin (93) are connected with a water inlet pipe (7) through a guide-out pipe fitting, and the water inlet sides of the first impurity removing bin (92) and the second impurity removing bin (93) are connected with a pre-buried pipe (10) through a guide-in pipe fitting;
the leading-in pipe fitting comprises a first leading-in pipe (95) and a second leading-in pipe (97) which are respectively positioned at the water inlet sides of a first impurity removing bin (92) and a second impurity removing bin (93), and the first leading-in pipe (95) is connected with the second leading-in pipe (97) through a first three-way valve (96);
the outlet pipe fitting comprises a first outlet pipe (98) and a second outlet pipe (910) which are respectively positioned at the water outlet sides of the first impurity removing bin (92) and the second impurity removing bin (93), and the first outlet pipe (98) is connected with the second outlet pipe (910) through a second three-way valve (99);
the device also comprises a recoil assembly (14);
the backflushing component (14) comprises a plunger pump (141) arranged in the water collecting tank (1), a backflushing pipe (142) is connected to the water outlet side of the plunger pump (141), the backflushing pipe (142) is connected with a first backflushing head (144) and a second backflushing head (145) through a third three-way valve (143), and the first backflushing head (144) and the second backflushing head (145) are connected and extend into the first impurity removing bin (92) and the second impurity removing bin (93) respectively.
2. The vacuum preloading continuous drainage device with the cleaning function as claimed in claim 1, wherein: all be provided with on first induction pipe (95) and second induction pipe (97) and extend to edulcoration case (91) outside discharge pipe (911), and be provided with solenoid valve (912) on discharge pipe (911).
3. The vacuum preloading continuous drainage device with the cleaning function as claimed in claim 1, wherein: the inner wall of the water collecting tank (1) is provided with an inclined filter plate (5), and the outer wall of the water collecting tank (1) and the bottom of the inclined end of the filter plate (5) are provided with a sewage discharge pipe (4).
4. The vacuum preloading continuous drainage device with the cleaning function as claimed in claim 1, wherein: an inclined injection pipe (13) is arranged at the end part of the water inlet pipe (7) extending into the water collecting tank (1), and an injection head (12) is arranged on the injection pipe (13).
5. The vacuum preloading continuous drainage device with the cleaning function as claimed in claim 1, wherein: and a liquid level sensor (3) is arranged on the inner wall of the water collecting tank (1) and below the filter plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222682068.5U CN218712863U (en) | 2022-10-12 | 2022-10-12 | Vacuum preloading continuous drainage device with cleaning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222682068.5U CN218712863U (en) | 2022-10-12 | 2022-10-12 | Vacuum preloading continuous drainage device with cleaning function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218712863U true CN218712863U (en) | 2023-03-24 |
Family
ID=85583217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222682068.5U Active CN218712863U (en) | 2022-10-12 | 2022-10-12 | Vacuum preloading continuous drainage device with cleaning function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218712863U (en) |
-
2022
- 2022-10-12 CN CN202222682068.5U patent/CN218712863U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2006231259A (en) | Sanding system | |
| CN218712863U (en) | Vacuum preloading continuous drainage device with cleaning function | |
| CN108644158A (en) | Automatic exhaust siphoning installation | |
| CN113550880B (en) | Anti-blocking mud pump capable of automatically adjusting water content of sludge and dredging method thereof | |
| CN112889383B (en) | A dark pipe desalination device | |
| EP0415360A2 (en) | Vacuum-type sewage collecting apparatus | |
| JPH0235902A (en) | Stagnant water collection equipment in the sand basin of the pump station | |
| CN110862147A (en) | Pulse water distribution device of leachate anaerobic UASB treatment system | |
| CN217053533U (en) | Prevent blockking up silt cleaning device for building engineering | |
| CN215053498U (en) | Water plant water pump station | |
| CN211873300U (en) | Vacuum flushing system | |
| CN212003619U (en) | Water source pool pumping system | |
| CN208049501U (en) | Sewage self-absorbing filtering device | |
| CN211799317U (en) | Full-automatic vacuum discharge guide device with solid-liquid separation function | |
| CN218923893U (en) | Sewage discharging equipment | |
| CN210009687U (en) | Horizontal filter equipment behind pump | |
| CN207830093U (en) | Diaphragm pump installation for sewage disposal | |
| CN114413179A (en) | A drainage device for steam pipelines | |
| CN207928818U (en) | A kind of intelligentized anti-clogging device for discharging sludge | |
| CN220058044U (en) | Open cut deep basal pit drainage structures | |
| CN205590483U (en) | Intelligent energy -conserving sewage treatment plant | |
| CN2333770Y (en) | Water-saving gravity valveless filter backflushing device | |
| CN107376439A (en) | Horizontal sedimentation tank sludge negative pressure cleaning plant | |
| CN222008969U (en) | Foundation pit tube well dewatering structure | |
| CN222392693U (en) | Steam hose station anti-freezing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |