CN106948470A - The automatic cleaning system of suction-type sewer scavenger - Google Patents
The automatic cleaning system of suction-type sewer scavenger Download PDFInfo
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- CN106948470A CN106948470A CN201710336405.6A CN201710336405A CN106948470A CN 106948470 A CN106948470 A CN 106948470A CN 201710336405 A CN201710336405 A CN 201710336405A CN 106948470 A CN106948470 A CN 106948470A
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- valve
- mouthfuls
- electromagnetic
- gas valve
- button switch
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/10—Wheeled apparatus for emptying sewers or cesspools
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Cleaning In General (AREA)
Abstract
A kind of automatic cleaning system of suction-type sewer scavenger, including gs-oil separator, vavuum pump, four-way valve, steam trap, dirt-absorption tank, the first button switch, master controller, gas bag, the first electromagnetic gas valve, servomotor, cylinder, the second electromagnetic gas valve, aquaporin, electromagnetic switch, water tank and the second button switch；First button switch, the first electromagnetic gas valve, servomotor, the second electromagnetic gas valve, electromagnetic switch and the second button switch are electrically connected with master controller;When pressing the first button switch, electric and control servomotor rotation is obtained by the electromagnetic gas valve of main controller controls first, the second electromagnetic gas valve, meanwhile, the timer in master controller starts timing, when the timer in master controller reaches setting time, main controller controls electromagnetic switch obtains electric；When pressing the second button switch, electric and control servomotor rotation is obtained by the electromagnetic gas valve of main controller controls first.Simple in construction, low cost of manufacture of the invention and with automatic cleaning function.
Description
Technical field
The present invention relates to a kind of suction-type sewer scavenger, and in particular to a kind of automatic cleaning system of suction-type sewer scavenger.
Background technology
The vacuum sewage sucking system of the suction-type sewer scavenger of prior art as shown in Figure 2 and Figure 4, including gs-oil separator 20, vavuum pump
21st, four-way valve 22, steam trap 23 and dirt-absorption tank 24.When suction-type sewer scavenger needs soil pick-up, operation four-way valve 22 is located at exhaust
Position, makes A1 mouthfuls of the first valve port of four-way valve 22 be connected for A3 mouthfuls with the 3rd valve port, A4 mouthfuls of the 4th valve port of four-way valve 22 and second
A2 mouthfuls of connections of valve port, vavuum pump 21 extracts the air in dirt-absorption tank 24 out, certain vacuum is produced in dirt-absorption tank 24 so that air
Pressure is more than pressure in dirt-absorption tank 24, and sewage in the presence of the difference of pressure, passes through dirt sucking tube in atmospheric pressure and dirt-absorption tank 24
In 25 press-in dirt-absorption tanks 24.The air of certain humidity is carried in dirt-absorption tank 24, by steam trap 23, after water is separated
Flow back in dirt-absorption tank 24, gas reaches the air inlet of vavuum pump 21 through four-way valve 22, gas is in the vavuum pump 21 and vavuum pump 21
Lubricating oil mixing, sprayed after vavuum pump 21 from the gas outlet of vavuum pump, oil gas mixture is separated by gs-oil separator 20,
Gas enters four-way valve 22, and air is discharged into by A4 mouthfuls of the 4th valve port of four-way valve 22.The U of Chinese patent literature CN 201800653
（Application number：201020520247.3）Disclosed a kind of novel pipeline system for special sewage-suction vehicles, using above-mentioned vacuum soil pick-up
System.The cleaning device of the suction-type sewer scavenger of prior art is typically improved by the pressure for making water of water pump, with by with pressure
Water cleans dirt-absorption tank 24, the U of Chinese patent literature CN 201932130（Application number：201020640592.0）Disclosed band is clear
The suction-type sewer scavenger of cleaning device, just by water pump make water pressure improve after clean dirt-absorption tank.The above-mentioned suction-type sewer scavenger with cleaning device
Need to carry out soil pick-up by vavuum pump, the pressure of water is cleaned dirt-absorption tank after improving by water pump, and water pump and vavuum pump are both needed to
Power set are set to drive it to rotate.Therefore complex structure, is more expensive to manufacture.
The content of the invention
It is an object of the invention to provide a kind of simple in construction, low cost of manufacture and the suction-type sewer scavenger with automatic cleaning function
Automatic cleaning system.
To achieve these goals, the technical scheme is that：A kind of automatic cleaning system of suction-type sewer scavenger, including oil gas
Separator, vavuum pump, four-way valve, steam trap and dirt-absorption tank.
Also include the first button switch, master controller, gas bag, the first electromagnetic gas valve, servomotor, cylinder, the second electromagnetism
Air valve, aquaporin, electromagnetic switch, water tank and the second button switch.
P mouthfuls of the air inlet of first electromagnetic gas valve is connected with gas bag, and gas outlet T mouthfuls of the first electromagnetic gas valve connects with air
Logical, A mouthfuls of the execution mouth and B mouthfuls of mouth of execution of the first electromagnetic gas valve are connected with the rodless cavity and rod chamber of cylinder respectively, the work of cylinder
Stopper rod is fixedly connected with the handle of four-way valve.
A1 mouthfuls of the first valve port of second electromagnetic gas valve is connected with water tank, A2 mouthfuls of the second valve port of the second electromagnetic gas valve with
Dirt-absorption tank is connected, A3 mouthfuls of the 3rd valve port of the second electromagnetic gas valve and the inlet communication of steam trap, the outlet of steam trap
Connected with A1 mouthfuls of the first valve port of four-way valve, A4 mouthfuls of the 4th valve port and atmosphere of four-way valve, the second valve port A2 of four-way valve
Mouthful and gs-oil separator outlet, A3 mouthfuls of the 3rd valve port of four-way valve connects with the air inlet of vavuum pump, and vavuum pump goes out
The inlet communication and vavuum pump of gas port and gs-oil separator are connected with servo motor transmission；The aquaporin be arranged on dirt-absorption tank with
Between water tank, electromagnetic switch is set in the aquaporin, and P mouthfuls of the water inlet of electromagnetic switch is connected with water tank, electromagnetic switch
T mouthfuls of delivery port is connected with dirt-absorption tank.
First button switch, the terminals K1 and K2 of the first electromagnetic gas valve, servomotor, the second electromagnetic gas valve connect
Line end K, the terminals K of electromagnetic switch and the second button switch are electrically connected with master controller;When pressing the first button switch,
Electric and control servomotor is obtained by the terminals K1 of the electromagnetic gas valve of main controller controls first, the second electromagnetic gas valve terminals K
Rotation, meanwhile, the timer in master controller starts timing, when the timer in master controller reaches setting time, master control
The terminals K of device control electromagnetic switch processed obtains electric；When pressing the second button switch, by the electromagnetic gas valve of main controller controls first
Terminals K2 obtain it is electric and control servomotor rotation.
There is the circular arc of indent on the water tank, and the radius of circular arc and the outer radius of dirt-absorption tank are identical.
First button switch and the second button switch are arranged in driver's cabin.
Benefit of the invention is that：Due to when pressing the first button switch, by the electromagnetic gas valve of main controller controls first
Terminals K1, the terminals K of the second electromagnetic gas valve obtain electric and control servomotor rotation, meanwhile, the timer in master controller
Start the rodless cavity that the pressed gas in timing, gas bag enters cylinder, the handle for promoting four-way valve by cylinder is moved, and makes four-way valve
A3 mouthfuls of the 3rd valve port connected for A4 mouthfuls with the 4th valve port, A1 mouthfuls of the first valve port of four-way valve is connected for A2 mouthfuls with the second valve port.Simultaneously
A1 mouthfuls of the first valve port of second electromagnetic gas valve is connected for A3 mouthfuls with the 3rd valve port, servomotor drive vavuum pump rotate, vavuum pump from
Air is sucked in air, the air of suction passes through gs-oil separator again through four-way valve to steam trap, then passes through the second electromagnetism
Enter water tank after air valve, increase the air pressure in water tank.When the timer in master controller reaches setting time, master controller
The terminals K of control electromagnetic switch obtains electric, P mouthfuls of the water inlet of electromagnetic switch is connected for T mouthfuls with delivery port, at this moment in water tank
Air pressure is larger, therefore the press water in water tank can enter dirt-absorption tank by electromagnetic switch, therefore tank body can be carried out automatic clear
Wash.Because automatic cleaning system is pressurizeed using the vavuum pump of suction-type sewer scavenger to water, it is not necessary to set water pump and drive water pump rotation
The power set turned, therefore simple in construction, low cost of manufacture.
Brief description of the drawings
Fig. 1 is the schematic diagram of the present invention；
Fig. 2 is the water tank of the present invention and the connection diagram of aquaporin and dirt-absorption tank；
Fig. 3 is Fig. 2 left view schematic diagram；
Fig. 4 is the schematic diagram of the vacuum sewage sucking system of prior art.
Reference in above-mentioned accompanying drawing is as follows：First button switch 1, master controller 2, gas bag 3, the first electromagnetic gas valve 4,
Servomotor 5, cylinder 6, the second electromagnetic gas valve 7, water channel 8, electromagnetic switch 9, water tank 10, the second button switch 11, oil gas point
From device 20, vavuum pump 21, four-way valve 22, steam trap 23, dirt-absorption tank 24.
Embodiment
Below in conjunction with accompanying drawing and the embodiment provided, the present invention is further illustrated.
As shown in Figure 1 to Figure 3, a kind of automatic cleaning system of suction-type sewer scavenger, including gs-oil separator 20, vavuum pump 21, four
Port valve 22, steam trap 23, dirt-absorption tank 24, the first button switch 1, master controller 2, gas bag 3, the first electromagnetic gas valve 4, servo
Motor 5, cylinder 6, the second electromagnetic gas valve 7, water channel 8, electromagnetic switch 9, the button switch 11 of water tank 10 and second.
P mouthfuls of the air inlet of first electromagnetic gas valve 4 is connected with gas bag 3, gas outlet T mouthfuls of the first electromagnetic gas valve 4 with it is big
Gas is connected, and A mouthfuls of the execution mouth and B mouthfuls of mouth of execution of the first electromagnetic gas valve 4 are connected with the rodless cavity and rod chamber of cylinder 6 respectively, gas
The piston rod of cylinder 6 is fixedly connected with the handle of four-way valve 22；The piston rod of cylinder 6 can drive the handle motion of four-way valve 22, make
Four-way valve 22 is located at different operating positions.
A1 mouthfuls of the first valve port of second electromagnetic gas valve 7 is connected with water tank 10, the second valve port A2 of the second electromagnetic gas valve 7
Mouthful connected with dirt-absorption tank 24, the inlet communication of A3 mouthfuls of the 3rd valve port of the second electromagnetic gas valve 7 and steam trap 23, steam is separated
The outlet of device 23 is connected with A1 mouthfuls of the first valve port of four-way valve 22, A4 mouthfuls of the 4th valve port and atmosphere of four-way valve 22, four-way
A2 mouthfuls of the second valve port of valve 22 and the outlet of gs-oil separator 20, A3 mouthfuls of the 3rd valve port and the vavuum pump 21 of four-way valve 22
Air inlet is connected, the gas outlet of vavuum pump 21 and the inlet communication of gs-oil separator 20 and vavuum pump 21 is driven with servomotor 5
Connection；The water channel 8 is arranged between dirt-absorption tank 24 and water tank 10, and electromagnetic switch 9 is arranged in the water channel 8, and electromagnetism
P mouthfuls of the water inlet of switch 9 is connected with water tank 10, and T mouthfuls of the delivery port of electromagnetic switch 9 is connected with dirt-absorption tank 24.
First button switch 1, the terminals K1 and K2 of the first electromagnetic gas valve 4, servomotor 5, the second electromagnetic gas valve 7
Terminals K, the terminals K of electromagnetic switch 9 and the second button switch 11 electrically connected with master controller 2;When press first by
During button switch 1, by master controller 2 control the terminals K1 of the first electromagnetic gas valve 4, the terminals K of the second electromagnetic gas valve 7 obtain it is electric and
Control servomotor 5 rotates, meanwhile, the timer in master controller 2 starts timing, when the timer in master controller 2 is reached
During setting time, the terminals K of the control electromagnetic switch 9 of master controller 2 obtains electric；When pressing the second button switch 11, by master control
Device 2 processed controls the terminals K2 of the first electromagnetic gas valve 4 to obtain electric and controls servomotor 5 to rotate.The master controller 2 is controlled for PLC
Device processed, the model Mitsubishi F × 3U or siemens PLC of master controller 2.
There is the circular arc of indent on the water tank 10, and the radius of circular arc is identical with the outer radius of dirt-absorption tank 24.So may be used
Make the compact conformation of the present invention, save space.
The button switch 11 of first button switch 1 and second is arranged in driver's cabin.More convenient operation can so be made.
As shown in Figure 1 to Figure 3, the process that the present invention is cleaned automatically is as follows：When suction-type sewer scavenger is cleaned automatically, press
During lower first button switch 1, the terminals K1, the second electromagnetic gas valve 7 of the first electromagnetic gas valve 4 wiring are controlled by master controller 2
End K obtains electric and control servomotor 5 and rotated.P mouthfuls of the air inlet of such first electromagnetic gas valve 4 is connected with performing mouth A mouthfuls, the first electricity
Pressed gas in execution mouthful B mouthfuls and the atmosphere of magnetism valve 4, gas bag 3 enters the nothing of cylinder 6 by the first electromagnetic gas valve 4
Rod cavity, the handle for promoting four-way valve 22 by cylinder 6 is moved, and A3 mouthfuls of the 3rd valve port of four-way valve 22 is connected for A4 mouthfuls with the 4th valve port
Logical, A1 mouthfuls of the first valve port of four-way valve 22 is connected for A2 mouthfuls with the second valve port.Simultaneously A1 mouthful of the first valve port of the second electromagnetic gas valve 7 and
3rd A3 mouthfuls of valve port is connected, and servomotor 5 also begins to rotation, and servomotor 5 drives vavuum pump 21 to rotate, and vavuum pump 21 is from big
Air is sucked in gas, the air of suction arrives steam trap 23 through four-way valve 22 again by gs-oil separator 20, then passes through second
Enter water tank 10 after electromagnetic gas valve 7, increase the air pressure in water tank 10.
When the timer in master controller 2 reaches setting time, the terminals K of the control electromagnetic switch 9 of master controller 2 is obtained
Electricity, makes P mouthfuls of the water inlet of electromagnetic switch 9 be connected for T mouthfuls with delivery port, at this moment the air pressure in water tank 10 is larger, therefore water tank
Press water in 10 can enter dirt-absorption tank 24 by electromagnetic switch 9, therefore tank body 24 can be cleaned automatically.Due to automatic clear
Wash system to pressurize to water using the vavuum pump 21 of suction-type sewer scavenger, it is not necessary to set water pump and drive the power dress of water pump rotation
Put, therefore simple in construction, low cost of manufacture.
After the completion of cleaning, the first button switch 1 is resetted, the terminals of the first electromagnetic gas valve 4 are controlled by master controller 2
K1, the terminals K of the second electromagnetic gas valve 7, the terminals K dead electricity of electromagnetic switch 9 and control servomotor 5 no longer rotate, at this moment
P mouthfuls of the air inlet of first electromagnetic gas valve 4 is not communicated with performing mouth A mouthfuls and performing B mouthfuls of mouth, the second valve of the second electromagnetic gas valve 7
A3 mouthfuls with the 3rd valve port of A2 mouthfuls of mouth is connected, and P mouthfuls of the water inlet of electromagnetic switch 9 is not communicated with for T mouthfuls with delivery port.
When pressing the second button switch 11, the terminals K2 of the first electromagnetic gas valve 4 is controlled to obtain electric and control by master controller 2
Servomotor 5 processed rotates.P mouthfuls of the air inlet of such first electromagnetic gas valve 4 connected with performing mouth B mouthfuls, and the first electromagnetic gas valve 4 is held
Pressed gas in A mouthfuls of row mouth and atmosphere, gas bag 3 enters the rod chamber of cylinder 6, and the hand of four-way valve 22 is promoted by cylinder 6
Handle is moved, and A3 mouthful of the 3rd valve port of four-way valve 60 is connected for A1 mouthfuls with the first valve port, A2 mouthfuls of the second valve port of four-way valve 60 and
4th A4 mouthfuls of valve port is connected, while the control servomotor 5 of master controller 2 rotates, servomotor 5 drives vavuum pump 21 to rotate, by
Connected for A3 mouthfuls with the 3rd valve port in A2 mouthfuls of the second valve port of now the second electromagnetic gas valve 7, vavuum pump 21 can be by dirt-absorption tank 24
Air is extracted out, and certain vacuum is produced in dirt-absorption tank 24, soil pick-up operation at this moment can be carried out.
Claims (3)
1. a kind of automatic cleaning system of suction-type sewer scavenger, including gs-oil separator（20）, vavuum pump（21）, four-way valve（22）, steam
Separator（23）And dirt-absorption tank（24）；It is characterized in that：
Also include the first button switch（1）, master controller（2）, gas bag（3）, the first electromagnetic gas valve（4）, servomotor（5）, gas
Cylinder（6）, the second electromagnetic gas valve（7）, aquaporin（8）, electromagnetic switch（9）, water tank（10）With the second button switch（11）；
First electromagnetic gas valve（4）P mouthfuls of air inlet and gas bag（3）Connection, the first electromagnetic gas valve（4）Gas outlet T mouthfuls with
Atmosphere, the first electromagnetic gas valve（4）Execution mouthfuls A mouthful and B mouthfuls of mouth of execution respectively with cylinder（6）Rodless cavity and rod chamber connect
It is logical, cylinder（6）Piston rod and four-way valve（22）Handle be fixedly connected；
Second electromagnetic gas valve（7）A1 mouthfuls of the first valve port and water tank（10）Connection, the second electromagnetic gas valve（7）The second valve port
A2 mouthfuls and dirt-absorption tank（24）Connection, the second electromagnetic gas valve（7）A3 mouthfuls of the 3rd valve port and steam trap（23）Inlet communication,
Steam trap（23）Outlet and four-way valve（22）The connection of A1 mouthfuls of the first valve port, four-way valve（22）A4 mouthfuls of the 4th valve port with
Atmosphere, four-way valve（22）A2 mouthfuls of the second valve port and gs-oil separator（20）Outlet, four-way valve（22）The 3rd
A3 mouthfuls of valve port and vavuum pump（21）Air inlet connection, vavuum pump（21）Gas outlet and gs-oil separator（20）Inlet communication
And vavuum pump（21）With servomotor（5）Drive connection；The aquaporin（8）It is arranged on dirt-absorption tank（24）With water tank（10）It
Between, electromagnetic switch（9）It is arranged on the aquaporin（8）In, and electromagnetic switch（9）P mouthfuls of water inlet and water tank（10）Connection, electromagnetism
Switch（9）T mouthfuls of delivery port and dirt-absorption tank（24）Connection；
First button switch（1）, the first electromagnetic gas valve（4）Terminals K1 and K2, servomotor（5）, the second electromagnetism gas
Valve（7）Terminals K, electromagnetic switch（9）Terminals K and the second button switch（11）And master controller（2）Electrical connection;When
Press the first button switch（1）When, by master controller（2）Control the first electromagnetic gas valve（4）Terminals K1, the second electromagnetic gas valve
（7）Terminals K obtain it is electric and control servomotor（5）Rotation, meanwhile, master controller（2）In timer start timing, work as master
Controller（2）In timer reach setting time when, master controller（2）Control electromagnetic switch（9）Terminals K obtain electric；When
Press the second button switch（11）When, by master controller（2）Control the first electromagnetic gas valve（4）Terminals K2 obtain electric and control and watch
Take motor（5）Rotation.
2. the automatic cleaning system of suction-type sewer scavenger according to claim 1, it is characterised in that：The water tank（10）Above have interior
Recessed circular arc, and the radius and dirt-absorption tank of circular arc（24）Outer radius it is identical.
3. the automatic cleaning system of suction-type sewer scavenger according to claim 1, it is characterised in that：First button switch（1）
With the second button switch（11）It is arranged in driver's cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710336405.6A CN106948470B (en) | 2017-05-13 | 2017-05-13 | The automatic cleaning system of suction-type sewer scavenger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710336405.6A CN106948470B (en) | 2017-05-13 | 2017-05-13 | The automatic cleaning system of suction-type sewer scavenger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106948470A true CN106948470A (en) | 2017-07-14 |
| CN106948470B CN106948470B (en) | 2019-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710336405.6A Active CN106948470B (en) | 2017-05-13 | 2017-05-13 | The automatic cleaning system of suction-type sewer scavenger |
Country Status (1)
| Country | Link |
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| CN (1) | CN106948470B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20307502U1 (en) * | 2003-05-13 | 2003-07-24 | Baier & Koeppel Gmbh & Co | Device designed and intended for installation in a suction rinsing vehicle equipped with a suction container, a vacuum pump and an exhaust pipe |
| CN103407399A (en) * | 2013-09-02 | 2013-11-27 | 湖北三环专用汽车有限公司 | Novel biogas slurry and biogas residue pumping and discharging vehicle |
| CN104088358A (en) * | 2014-06-16 | 2014-10-08 | 浙江广厦建设职业技术学院 | Automatic green manure transporter |
| CN104746638A (en) * | 2015-04-08 | 2015-07-01 | 杨朝虹 | Powerful stain absorbing type sludge and liquid separating vehicle |
| US9611636B2 (en) * | 2013-01-11 | 2017-04-04 | Super Products Llc | Mobile water reclaiming system |
-
2017
- 2017-05-13 CN CN201710336405.6A patent/CN106948470B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20307502U1 (en) * | 2003-05-13 | 2003-07-24 | Baier & Koeppel Gmbh & Co | Device designed and intended for installation in a suction rinsing vehicle equipped with a suction container, a vacuum pump and an exhaust pipe |
| US9611636B2 (en) * | 2013-01-11 | 2017-04-04 | Super Products Llc | Mobile water reclaiming system |
| CN103407399A (en) * | 2013-09-02 | 2013-11-27 | 湖北三环专用汽车有限公司 | Novel biogas slurry and biogas residue pumping and discharging vehicle |
| CN104088358A (en) * | 2014-06-16 | 2014-10-08 | 浙江广厦建设职业技术学院 | Automatic green manure transporter |
| CN104746638A (en) * | 2015-04-08 | 2015-07-01 | 杨朝虹 | Powerful stain absorbing type sludge and liquid separating vehicle |
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| Publication number | Publication date |
|---|---|
| CN106948470B (en) | 2019-05-10 |
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Effective date of registration: 20190213 Address after: Room 605-2, Building 7, Central Plains National Advertising Industry Park, 450000 Zhengzhou High-tech Industrial Development Zone, Henan Province Applicant after: Zhengzhou hern Electronic Information Technology Co., Ltd. Address before: 213000 Tianshan Road, Xinbei District, Changzhou, Jiangsu Province, No. 21 Applicant before: Liu Jian |
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Effective date of registration: 20190408 Address after: No. 17-1-6, Building No. 3, Yuanjiang Road, Liuzhou City, 545000 Guangxi Zhuang Autonomous Region Applicant after: Guangxi Hengmei Environmental Protection Engineering Co., Ltd. Address before: Room 605-2, Building 7, Central Plains National Advertising Industry Park, 450000 Zhengzhou High-tech Industrial Development Zone, Henan Province Applicant before: Zhengzhou hern Electronic Information Technology Co., Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Automatic cleaning system of sewage suction vehicle Effective date of registration: 20220328 Granted publication date: 20190510 Pledgee: Guangxi Guihui Financing Guarantee Co.,Ltd. Pledgor: GUANGXI HENGMEILI ENVIRONMENTAL PROTECTION ENGINEERING Co.,Ltd. Registration number: Y2022450000022 |
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