CN111346726A - Movable sand washing station - Google Patents

Movable sand washing station Download PDF

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Publication number
CN111346726A
CN111346726A CN202010173563.6A CN202010173563A CN111346726A CN 111346726 A CN111346726 A CN 111346726A CN 202010173563 A CN202010173563 A CN 202010173563A CN 111346726 A CN111346726 A CN 111346726A
Authority
CN
China
Prior art keywords
dewatering screen
tractor
sand
spiral
sand washer
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.)
Pending
Application number
CN202010173563.6A
Other languages
Chinese (zh)
Inventor
马娟
程耀辉
于雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Luoyang Longzhong Heavy Industry Machinery Co ltd
Original Assignee
Luoyang Longzhong Heavy Industry Machinery Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Luoyang Longzhong Heavy Industry Machinery Co ltd filed Critical Luoyang Longzhong Heavy Industry Machinery Co ltd
Priority to CN202010173563.6A priority Critical patent/CN111346726A/en
Publication of CN111346726A publication Critical patent/CN111346726A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/48Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D33/00Filters with filtering elements which move during the filtering operation
    • B01D33/01Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/03Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
    • B01D33/0346Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements
    • B01D33/0353Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements with flat filtering elements self-supporting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/48Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
    • B03B5/52Spiral classifiers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04Cleaning involving contact with liquid
    • B08B3/041Cleaning travelling work
    • B08B3/042Cleaning travelling work the loose articles or bulk material travelling gradually through a drum or other container, e.g. by helix or gravity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04Cleaning involving contact with liquid
    • B08B3/10Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity, by vibration

Abstract

The invention discloses a movable sand washing station, which comprises a tractor, a spiral sand washing machine, a wheel type sand washing machine, a separator and a dewatering screen, wherein the spiral sand washing machine, the wheel type sand washing machine, the separator and the dewatering screen are sequentially arranged on a vehicle plate of the tractor along the direction opposite to the driving direction of the tractor, a slurry pump is fixedly connected to the lower part of the wheel type sand washing machine on the vehicle plate of the tractor, and the slurry pump is inserted into a slurry box positioned below the dewatering screen through a slurry pipe. The invention does not need a large number of foundations and supporting facility engineering construction, avoids the difficulty of civil engineering construction, and can be put into production as soon as possible; the unit devices are pre-assembled, assembled and debugged in a factory, the on-site installation and debugging time is shortened, the layout of the devices is randomly adjusted according to the requirements of a construction site along with construction, the space is saved, the production cost is effectively reduced, and the device is arranged on special vehicle-mounted equipment, so that the functions of high yield, high efficiency, reliable performance, quick installation and production operation after power connection are realized.

Description

Movable sand washing station
Technical Field
The invention relates to the technical field of sand washing equipment, in particular to a movable sand washing station.
Background
The machine-made sand generally contains certain impurities and dust after being crushed and the natural sand is mined, and the product cannot meet the relevant industrial standard, so that the sand washer becomes an indispensable ring on a sand making production line. The appearance of the wheel bucket type sand washer is similar to that of a waterwheel, one side of the manufactured sand flows in, the sand flows out from the other side after the wheel bucket rotates for a circle, water is injected from one side and automatically overflows to one side, and therefore the purity and the cleaning capacity of the water are guaranteed. The screw device of the spiral sand washer stirs the sand and stone material, so that soil in the sand and stone material is mixed with water and discharged from a flow port on the equipment, and the sand and stone material is gradually screened under the action of the screw device and discharged from a discharge port at the top, so that the cleaning and screening effects of the sand and stone material are realized.
In addition, the existing sand washing equipment is single, does not have the functions of dehydration and fine sand recovery, is limited by a sand washing site, environment and foundation configuration, seriously influences the use requirements of customers, and in the field of tunnel earth shield, underground non-excavation and other building engineering, most of the existing sand washing equipment is inconvenient to treat waste slurry, and has serious sludge drying problem, which seriously hinders the economic benefit and the production cost of sandstone aggregate production enterprises.
Disclosure of Invention
Technical problem to be solved
In view of the deficiencies of the prior art, the present invention provides a mobile sand washing station that solves the problems noted in the background above.
(II) technical scheme
In order to solve the problems mentioned in the background art, the invention provides the following technical scheme: portable sand washing station, including tractor, spiral sand washer, wheeled sand washer, separator and dewatering screen have been arranged in proper order along the opposite direction of tractor travel direction on the sweep of tractor, the below fixedly connected with sediment stuff pump that lies in wheeled sand washer on the sweep of tractor, the sediment stuff pump passes through the sediment thick liquid pipe and pegs graft inside the sediment thick liquid incasement portion that lies in the dewatering screen below.
Preferably, the spiral sand washer is hinged to a plate of the tractor, and a lifting device enabling the spiral sand washer to rotate around a hinged point is hinged to a position, far away from the hinged point, of the lower surface of the spiral sand washer.
Preferably, the lifting rod lifting device comprises a push rod hinged on a fixed seat on the lower surface of the spiral sand washer and a protection rod positioned on one side of the fixed seat and hinged with the lower surface of the spiral sand washer.
Preferably, the ground-near ends of the protection rod and the push rod are hinged to a vehicle plate of the tractor, and the protection rod and the push rod form an included angle of 0-90 degrees when in a supporting state to form a triangular stable protection structure.
Preferably, the push rod is one of a hydraulic rod, an electric push rod or a pneumatic push rod, and the guard rod is a hydraulic rod.
Preferably, the non-hinged end of the spiral sand washer is fixedly connected with a spiral sand washer impeller motor, the spiral sand washer impeller motor is a servo motor, the spiral sand washer impeller motor is connected with a spiral sand washer impeller shaft through a conveyor belt in a transmission manner, and a spiral impeller opposite to the running direction of the tractor is arranged on the spiral sand washer impeller shaft.
Preferably, one side of the wheel type sand washer is provided with an impeller water tank for receiving materials of the spiral sand washer, and the inner bottom wall of the impeller water tank is provided with a gauze.
Preferably, the bottom of the dewatering screen is provided with a dewatering screen groove, a high-pressure separation pipe communicated with the separator is arranged in the dewatering screen groove, one end of the high-pressure separation pipe is fixedly connected with a high-pressure water pump, the output end of the high-pressure water pump is connected with the separator, the bottom of the separator is provided with a separator underflow port, and one end of the separator underflow port abuts against a screen plate of the dewatering screen.
Preferably, the dewatering screen passes through damping spring fixed connection on the sweep of tractor, and the dewatering screen is the slope setting, and the one end that is close to the tractor locomotive is lower end, and the one end of keeping away from the tractor locomotive is higher end, the dewatering screen comprises dewatering screen sieve board and dewatering screen groove, dewatering screen groove discharge gate articulates there is dewatering screen unloading swash plate, the below of dewatering screen unloading swash plate is provided with the net workbin.
Preferably, the height of the contact part of the dewatering screen and the wheel type sand washer is higher than that of the blanking inclined plate of the dewatering screen.
(III) advantageous effects
Compared with the prior art, the invention provides a movable sand washing station, which has the following beneficial effects:
1. according to the invention, a series of sand washing devices are assembled and integrated and are arranged on the special vehicle-mounted device, so that the functions of large yield, high efficiency, reliable performance, quickness in installation and operation and production after power connection are realized.
2. The invention does not need a large number of foundations and supporting facility engineering construction, avoids the difficulty of civil engineering construction, and can be put into production as soon as possible; the unit devices are pre-assembled, assembled and debugged in a factory, the on-site installation and debugging time is shortened, the layout of the devices is randomly adjusted according to the requirements of a construction site along with construction, the space is saved, the occupied area of the construction site is reduced, and the production cost is effectively reduced.
3. The invention integrates the process equipment of sand washing, dehydration, transmission and the like, has the advantages of high-quality sand cleaning and dehydration operation performance of sand aggregate production through the optimization of the process flow, convenient and quick maintenance of the equipment, safety and high efficiency, greatly reduces the number of operators, optimizes operation management and the like, adopts a gravity-flow mode basically for fluid, reduces the use of pumps, has small power of the whole machine, saves energy and protects environment, and the treated water and mud can meet the national environmental protection requirement.
4. The whole machine of the invention adopts a standard tire type flat car, has strong maneuverability, is convenient for road transportation and transition, and can quickly transfer to a construction site.
5. The invention can form a strong sand washing operation assembly line by combining different machine types to finish the processing operation with multiple requirements, and one vehicle can be provided with a plurality of devices according to the production requirements to meet the requirement of one vehicle for one line.
Drawings
FIG. 1 is a schematic structural view of a mobile sand washing station according to the present invention;
FIG. 2 is a schematic structural view of a transportation state of the mobile sand washing station according to the present invention;
FIG. 3 is a schematic top view of a mobile sand washing station according to the present invention;
fig. 4 is a schematic process flow diagram of the mobile sand washing station provided by the invention.
In the figure: 1. a tractor; 2. a spiral sand washer; 3. a wheel type sand washer; 4. a separator; 5. dewatering screen; 6. a slurry pump; 7. a slag slurry tank; 8. a push rod; 9. a guard bar; 10. an impeller motor of a spiral sand washer; 11. an impeller shaft of a spiral sand washer; 12. a high pressure water pump; 13. an impeller water tank; 14. a dewatering screen tank; 15. a screen plate of a dewatering screen; 16. purifying the material box; 17. a shock absorbing spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: the movable sand washing station comprises a tractor 1, a spiral sand washing machine 2, a wheel type sand washing machine 3, a separator 4 and a dewatering screen 5, wherein the spiral sand washing machine 2, the wheel type sand washing machine 3, the separator 4 and the dewatering screen 5 are sequentially arranged on a vehicle plate of the tractor 1 along the direction opposite to the driving direction of the tractor 1, a slurry pump 6 is fixedly connected below the wheel type sand washing machine 3 on the vehicle plate of the tractor 1, the slurry pump 6 is inserted into a slurry tank 7 below the dewatering screen 5 through a slurry pipe, the spiral sand washing machine 2 is hinged on the vehicle plate of the tractor 1, a lifting device for enabling the spiral sand washing machine 2 to rotate around a hinged point is hinged to the position, far away from the hinged point, of the lower surface of the spiral sand washing machine 2, and the lifting device comprises a push rod 8 hinged on a fixed seat on the lower surface of the spiral sand washing machine 2 and a rod 9 hinged to the, the ground-near ends of the protective rod 9 and the push rod 8 are both hinged on a plate of the tractor 1, and form an included angle of 0-90 degrees when the protective rod and the push rod are in a supporting state, so that a triangular stable protective structure is formed, when the spiral sand washer 2 is pushed to the highest point by a lifting device, the height of a discharge port is lower than the maximum height of the hinged end of the spiral sand washer, so that sand can be washed in the spiral sand washer 2 for as long as possible, and after sand washing is finished, the sand directly enters the next process due to the action of gravity without overflow, so that the sand washing efficiency is greatly improved, the push rod 8 is one of a hydraulic rod, an electric push rod or a pneumatic push rod, the protective rod 9 is a hydraulic rod, the non-hinged end of the spiral sand washer 2 is fixedly connected with a spiral sand washer impeller motor 10, the spiral sand washer impeller motor 10 is a servo motor, the spiral sand washer impeller motor 10 is connected with a spiral sand washer impeller shaft 11 through, a spiral impeller opposite to the driving direction of the tractor 1 is arranged on an impeller shaft 11 of the spiral sand washer, an impeller water tank 13 for receiving materials of the spiral sand washer 2 is arranged on one side of a wheel type sand washer 3, a gauze is arranged on the inner bottom wall of the impeller water tank 13, a dewatering screen tank 14 is arranged at the bottom of the dewatering screen 5, a high-pressure separation pipe communicated with the separator 4 is arranged inside the dewatering screen tank 14, one end of the high-pressure separation pipe is fixedly connected with a high-pressure water pump 12, the output end of the high-pressure water pump 12 is connected with the separator 4, a separator underflow port is arranged at the bottom of the separator 4, one end of the separator underflow port is abutted against a dewatering screen plate 15, the dewatering screen 5 is fixedly connected to a vehicle plate of the tractor 1 through a damping spring 17, the dewatering screen 5 is obliquely arranged, one end close to the vehicle head of the tractor 1 is a lower end, one end far away from the vehicle head of the tractor 1 is a higher end, the discharge port of the dewatering screen groove 14 is hinged with a dewatering screen blanking inclined plate, a clean material box 16 is arranged below the dewatering screen blanking inclined plate, the height of the contact part of the dewatering screen 5 and the wheel type sand washer 3 is higher than that of the dewatering screen 5, the setting is the same as the setting principle of the spiral sand washer 2, the time of sand and stone on the dewatering screen 5 is prolonged, the sand and stone can be cleaned efficiently, and then the clean material can be conveyed to the inside of the clean material box 16 under the action of gravity.
The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.
When the spiral sand washer is used, sand enters the sand washing water tank from the feeding tank, the impeller motor 10 of the spiral sand washer rotates at a certain rotating speed through the driving belt, sand rolls under the driving of the impeller and is mutually ground, impurities covering the surface of the sand are removed, and meanwhile, a water vapor layer covering sand grains is damaged, so that dehydration is facilitated, and the first-time cleaning is carried out; the finished material mixed spray water of the spiral sand washer 2 directly enters the wheel type sand washer 3, when the wheel type sand washer 3 works, the sand stones cleaned for the first time enter an impeller water tank 13 of the wheel type sand washer 3, the sand stones to be cleaned roll over under the driving of an impeller and are mutually ground, impurities such as dust, mud and the like covering the surfaces of the sand stones are effectively removed, meanwhile, a water vapor layer covering the sand grains is damaged in the washing process, the sand grains are fished up after washing, and in the rotating process of the impeller, most of sewage is removed by using a sand net cleaned by the wheel, the water content of the sand is reduced, so that the cleaning effect is achieved, the dehydration is facilitated, and the second cleaning is carried out; then the sewage enters a dewatering screen 5 for dewatering treatment, the dewatering screen 5 adopts a double-motor self-synchronizing technology, a universal eccentric block and an adjustable amplitude vibrator, the water entering a dewatering screen water tank 14 is fed into a separator 4 by a high-pressure water pump 12, the separator 4 realizes the concentration and separation of solid particles, slurry with the concentration of about 50% flows out from a bottom flow port of the separator 4 and flows into a dewatering screen plate 15, the dewatering operation is completed again, the fine particle sand is recovered with high efficiency, and the wastewater with the suspended matter less than 3% flows into a return water tank from an overflow port of the separator 4 and is discharged through a discharge pipeline.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. Portable sand washing station, its characterized in that: including tractor (1), spiral sand washer (2), wheeled sand washer (3), separator (4) and dewatering screen (5) have been arranged in proper order along the opposite direction of tractor (1) travel direction on the sweep of tractor (1), the below fixedly connected with sediment stuff pump (6) that lie in wheeled sand washer (3) on the sweep of tractor (1), sediment stuff pump (6) are pegged graft inside sediment stuff box (7) that lie in dewatering screen (5) below through the sediment stuff pipe.
2. The mobile sand wash station of claim 1, wherein: the spiral sand washer (2) is hinged to a plate of the tractor (1), and a lifting device enabling the spiral sand washer (2) to rotate around a hinged point is hinged to a position, far away from the hinged point, of the lower surface of the spiral sand washer (2).
3. The mobile sand wash station of claim 2, wherein: the lifting rod lifting device comprises a push rod (8) hinged to a fixed seat on the lower surface of the spiral sand washer (2) and a protection rod (9) located on one side of the fixed seat and hinged to the lower surface of the spiral sand washer (2).
4. The mobile sand wash station of claim 3, wherein: the ground-near ends of the protective rod (9) and the push rod (8) are hinged to a vehicle plate of the tractor (1), and the protective rod and the push rod form an included angle of 0-90 degrees when in a supporting state, so that a triangular stable protective structure is formed.
5. The mobile sand wash station of claim 4, wherein: the push rod (8) is one of a hydraulic rod, an electric push rod or a pneumatic push rod, and the protection rod (9) is a hydraulic rod.
6. The mobile sand wash station according to any one of claims 1 to 4, wherein: the spiral sand washer is characterized in that a non-hinged end of the spiral sand washer (2) is fixedly connected with a spiral sand washer impeller motor (10), the spiral sand washer impeller motor (10) is a servo motor, the spiral sand washer impeller motor (10) is connected with a spiral sand washer impeller shaft (11) through transmission of a conveying belt, and a spiral impeller which is opposite to the driving direction of the tractor (1) is arranged on the spiral sand washer impeller shaft (11).
7. The mobile sand wash station of claim 1, wherein: one side of the wheel type sand washer (3) is provided with an impeller water tank (13) for receiving materials of the spiral sand washer (2), and the inner bottom wall of the impeller water tank (13) is provided with a gauze.
8. The mobile sand wash station of claim 1, wherein: the bottom of dewatering screen (5) is equipped with dewatering screen groove (14), and the inside of dewatering screen groove (14) is equipped with the high pressure separator tube with separator (4) intercommunication, and the one end fixedly connected with high pressure water pump (12) of high pressure separator tube, the output of high pressure water pump (12) are connected with separator (4), and the bottom of separator (4) is equipped with separator underflow opening, the one end butt of separator underflow opening is on dewatering screen sieve (15).
9. The mobile sand wash station of claim 1, wherein: dewatering screen (5) are through damping spring (17) fixed connection on the sweep of tractor (1), and dewatering screen (5) are the slope setting, and the one end that is close to tractor (1) locomotive is lower end, and the one end of keeping away from tractor (1) locomotive is higher end, dewatering screen (5) comprise dewatering screen sieve (15) and dewatering screen groove (14), dewatering screen groove (14) discharge gate articulates there is dewatering screen unloading swash plate, the below of dewatering screen unloading swash plate is provided with net workbin (16).
10. The mobile sand wash station of claim 1, wherein: the height of the contact part of the dewatering screen (5) and the wheel type sand washer (3) is higher than that of the blanking inclined plate of the dewatering screen (5).
CN202010173563.6A 2020-03-13 2020-03-13 Movable sand washing station Pending CN111346726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010173563.6A CN111346726A (en) 2020-03-13 2020-03-13 Movable sand washing station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010173563.6A CN111346726A (en) 2020-03-13 2020-03-13 Movable sand washing station

Publications (1)

Publication Number Publication Date
CN111346726A true CN111346726A (en) 2020-06-30

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ID=71189853

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010173563.6A Pending CN111346726A (en) 2020-03-13 2020-03-13 Movable sand washing station

Country Status (1)

Country Link
CN (1) CN111346726A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5454460A (en) * 1977-10-06 1979-04-28 Kurita Water Ind Ltd Sea sand washer
CN104923380A (en) * 2015-06-26 2015-09-23 洛阳隆中重工机械有限公司 Novel sand washer
CN204685274U (en) * 2015-05-20 2015-10-07 孟永江 A kind of portable sand washer with impeller
CN205392722U (en) * 2016-01-27 2016-07-27 洛阳隆中重工机械有限公司 DS series washing all -in -one
CN106269171A (en) * 2016-09-20 2017-01-04 何春军 A kind of portable sand station processed
CN212167766U (en) * 2020-03-13 2020-12-18 洛阳隆中重工机械有限公司 Movable sand washing station

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5454460A (en) * 1977-10-06 1979-04-28 Kurita Water Ind Ltd Sea sand washer
CN204685274U (en) * 2015-05-20 2015-10-07 孟永江 A kind of portable sand washer with impeller
CN104923380A (en) * 2015-06-26 2015-09-23 洛阳隆中重工机械有限公司 Novel sand washer
CN205392722U (en) * 2016-01-27 2016-07-27 洛阳隆中重工机械有限公司 DS series washing all -in -one
CN106269171A (en) * 2016-09-20 2017-01-04 何春军 A kind of portable sand station processed
CN212167766U (en) * 2020-03-13 2020-12-18 洛阳隆中重工机械有限公司 Movable sand washing station

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