CN109624074A - A kind of movable concrete stirring machine - Google Patents

A kind of movable concrete stirring machine Download PDF

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Publication number
CN109624074A
CN109624074A CN201910031377.6A CN201910031377A CN109624074A CN 109624074 A CN109624074 A CN 109624074A CN 201910031377 A CN201910031377 A CN 201910031377A CN 109624074 A CN109624074 A CN 109624074A
Authority
CN
China
Prior art keywords
rack
concrete stirring
stirring machine
support
supporting leg
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.)
Withdrawn
Application number
CN201910031377.6A
Other languages
Chinese (zh)
Inventor
鲍少权
王学俊
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN201910031377.6A priority Critical patent/CN109624074A/en
Publication of CN109624074A publication Critical patent/CN109624074A/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/18Mixing in containers to which motion is imparted to effect the mixing
    • B28C5/20Mixing in containers to which motion is imparted to effect the mixing rotating about a horizontal or substantially horizontal axis during mixing, e.g. without independent stirrers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/0806Details; Accessories
    • B28C5/0856Supporting frames or structures, e.g. supporting wheels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/18Mixing in containers to which motion is imparted to effect the mixing
    • B28C5/20Mixing in containers to which motion is imparted to effect the mixing rotating about a horizontal or substantially horizontal axis during mixing, e.g. without independent stirrers
    • B28C5/2018Transportable containers, e.g. on a wheelbarrow, to be fixed totally or partly in a mixer, e.g. for rotation therewith
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04Supplying or proportioning the ingredients
    • B28C7/06Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
    • B28C7/064Supply from sacks; Sack openers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The present invention relates to a kind of movable concrete stirring machines, including organic frame, rack is equipped with mixing drum and feeding funnel, it further include having bracket, front axle, hind axle, the bottom of rack is equipped with one group of front wheel, one group of rear roller, front wheel is mounted on the two sides of bracket through front axle, and the front end of bracket and rack is rotatably assorted, and rear roller is mounted on the two sides of rear end of rack through hind axle.By adopting the above technical scheme, the present invention provides a kind of movable concrete stirring machines, and not only conveniently moving, can also realize to different directions movement, moreover, stability is good, will not generate inclination.

Description

A kind of movable concrete stirring machine
Technical field
The present invention relates to blender field, in particular to a kind of movable concrete stirring machine.
Background technique
Existing concrete mixer has movable type and fixed two kinds, includes organic frame, and rack is equipped with stirring Cylinder and feeding funnel, fixed blender carry when it is highly inconvenient, need to be forked by fork truck or crane or Slinging could carry, labor intensive, financial resources;And mobile blender, the rear side in the bottom of rack are equipped with a pair of of idler wheel, are The balance for guaranteeing rack is equipped with a pair of support arms, still, this travelling mixer, in movement in the front side of bottom of the frame When need the support arm by the front side of blender lift could push its move, it is also desirable to 4,5 workers are just able to achieve, time-consuming Effort.
Summary of the invention
The purpose of the present invention: in order to overcome the drawbacks of the prior art, the present invention provides a kind of stirrings of mobile concrete Machine, not only conveniently moving, can also realize to different directions movement, moreover, stability is good, will not generate inclination.
Technical solution of the present invention: a kind of movable concrete stirring machine, including organic frame, rack be equipped with mixing drum with And feeding funnel, it is characterised in that: further include having bracket, front axle, hind axle, the bottom of rack is equipped with one group of front wheel, one group Rear roller, front wheel are mounted on the two sides of bracket through front axle, and the front end of bracket and rack is rotatably assorted, and rear roller is through hind axle It is mounted on the two sides of rear end of rack.
By adopting the above technical scheme, by one group of front wheel of setting and one group of rear roller, can be convenient will stir in this way Machine moves integrally, and stability is good, inclination will not be generated, without slinging or lifting blender;Furthermore the branch for passing through setting Frame, front wheel are mounted on bracket two sides, and bracket and gantry rotation cooperate, and bracket can be pulled to drive to different directions in this way Blender moves integrally.Therefore, the concrete mixer of this structure, not only conveniently moving, can also realize to not Tongfang To movement, moreover, stability is good, inclination will not be generated.
The further setting of the present invention: the bracket is equipped with lantern ring, the corresponding set ring position in the bottom of the rack Equipped with turntable, the turntable is rotatably arranged in lantern ring, and ball is equipped between turntable and lantern ring.
Using above-mentioned further setting, being rotatably assorted for the front end of bracket and rack, structure are formed by turntable and lantern ring Simply, easy for installation;Ball can reduce the abrasion between turntable and lantern ring, prolong the service life.
Further setting of the invention: corresponding to mixing drum discharge port position and be provided tiltedly with and draw flitch in the rack, Draw flitch and be higher than one end far from discharge port close to one end of mixing drum discharge port, draws flitch and be mounted on the rack through mounting rack, Mounting rack is detachably connected with rack.
Further it is arranged using above-mentioned, since the height of mixing drum discharge port is generally relatively high, is passing through manpower Trolley can introduce the material of mixing drum discharge port on manpower trolley when accepting concrete, to draw flitch;When passing through other fortune When defeated tool (such as tractor, lorry) is transported, it can will draw flitch and disassemble, use scope is wide, more convenient.
Further setting again of the invention: the mounting rack includes first support bar, second support bar, third branch Strut, first support bar are located at the lower section of second support bar and third support rod, and first support bar one end is through bolt, nut and draws Flitch connection, the other end are equipped at intervals with several adjustment holes along its length, and bracket is equipped with mounting base, and mounting base is equipped with Mounting hole is inserted with connecting column between mounting hole and wherein an adjustment hole;Second support bar one end and draw flitch through bolt, nut Connection, the other end and gantry rotation cooperate;Third support rod one end with draw flitch and connect through bolt, nut, the other end also with machine Frame is rotatably assorted.
Using above-mentioned setting further again, several adjustment holes of setting can unclamp first support bar and draw flitch Between bolt, nut then select different adjustment holes, i.e., the changeable tilt angle for drawing flitch meets different transport vehicles Needs, use scope is wide, easy to adjust.
Further setting again of the invention: second support bar is equipped with jack, and jack position is corresponded in rack and is equipped with hinge Hole is connect, articulated shaft is equipped in jack and hinge hole, articulated shaft one end is equipped with bending section, and the other end is equipped with bolt;Third branch Strut and rack articulated manner and second support bar are identical as rack articulated manner.
Using above-mentioned setting further again, the bending section of setting and bolt can prevent articulated shaft from generating axial sliding Dynamic to fall, this mounting means, structure is simple, installation, convenient disassembly.
Further setting again of the invention: mounting rack further includes having the first support arm, the second support arm, the first support arm One end is fixed with second support bar, and the other end compresses on the rack, and second support arm one end is fixed with third support rod, the other end Also it compresses on the rack.
Using above-mentioned setting further again, the first support arm, the second support arm of setting can be to first support bars, Two support rods play supporting role well, it is prevented to be deformed.
Further setting again of the invention: the rack is equipped with supporting leg, and supporting leg lower end is support end, upper end Hingedly cooperate with rack, be additionally provided in rack for after supporting leg rotation is packed up to supporting leg into line-locked positioning component.
Using above-mentioned setting further again, in blender normal use, can be put down with rotational support leg and ground Face contradicts, so as to integrally play supporting role well to blender;When mixer, supporting leg can be rotated It packs up, is locked supporting leg by positioning component, it is easy to use.
Further setting again of the invention: supporting leg sets there are two and is located at the two sides of rear end of rack, positioning group Part includes drawstring, wherein a supporting leg is equipped with retaining ring, drawstring be located on retaining ring, and drawstring is equipped with lock hook, another support The inside of leg, which is equipped with, hooks slot, and the lock hook of drawstring is hooked to be located at after supporting leg is turned out and packs up and be hooked in slot.
Using above-mentioned setting further again, supporting leg is turned out pack up after, can by the lock hook of drawstring hook prop up In the hook slot of support leg, when blender normal use, the lock hook of drawstring can directly be hooked in the rack of blender i.e. Can, it is easy to use, it is easy to operate;Furthermore the overall weight of supporting leg can be mitigated by hooking slot, save material.
Further setting again of the invention: the rack is equipped with boom, and boom is equipped with motor, hawser, tensioning Wheel, tensioning wheel are located at boom upper end, and hawser one end is equipped with suspension hook, and the other end is connect after bypassing tensioning wheel with the output end of motor.
Using above-mentioned setting further again, the suspension hook of setting can sling bag of cement and be passed in feeding funnel, nothing Manual handling is needed, it is time saving and energy saving, it is easy to operate.
Further setting again of the invention: being additionally provided with pedestal in the rack, the lower end of boom is equipped with cylinder, cylinder Cooperation is circumferentially rotated with pedestal.
It, in this way can be with swinging boom, to change the position of bag of cement on suspension hook, energy using above-mentioned setting further again Meets the needs of different operating conditions;Furthermore this boom rotates set-up mode, can be turned when not in use close to rack, Interference will not be generated to the external world when blender transports, eliminated safe hidden trouble.
Detailed description of the invention
Fig. 1 is the front side structure figure of the specific embodiment of the invention;
Fig. 2 is the rear structure figure of the specific embodiment of the invention;
Fig. 3 is rear structure figure when supporting leg is packed up in the specific embodiment of the invention;
Fig. 4 is front side structure figure when supporting leg is packed up in the specific embodiment of the invention;
Fig. 5 is bracket and gantry rotation matching chart in the specific embodiment of the invention;
Fig. 6 is rack assumption diagram in the specific embodiment of the invention;
Fig. 7 is to draw flitch installation diagram in the specific embodiment of the invention;
Fig. 8 is mounting rack structure chart in the specific embodiment of the invention.
Specific embodiment
As shown in figures 1-8, a kind of movable concrete stirring machine, including organic frame 1, rack 1 be equipped with mixing drum 2 and Feeding funnel 3 further includes having bracket 4, front axle 5, hind axle 6, and the bottom of rack 1 is equipped with one group of front wheel, 7, one groups of rear rollers 8, Front wheel 7 is mounted on the two sides of bracket 4 through front axle 5, and bracket 4 and the front end of rack 1 are rotatably assorted, and rear roller 8 is through hind axle 6 It is mounted on the two sides of 1 rear end of rack, in the specific embodiment of the invention, one group of front wheel 7 and one group of rear roller 8 are respectively set two A, two front wheels 7 are separately positioned on the two sides of bracket 4, and two rear rollers 8 are separately positioned on the two sides of rack 1;Certainly, one Group front wheel 7 and one group of rear roller 8, which also can according to need, is arranged more.After one group of front wheel 7 of setting and one group Idler wheel 8, can be convenient move integrally blender in this way, and stability is good, will not generate inclination, it is not necessary that blender is sling or It lifts;Furthermore by the bracket of setting 4, front wheel 7 is mounted on 4 two sides of bracket, and bracket 4 is rotatably assorted with rack 1, in this way may be used To pull bracket 4 to drive blender to move integrally to different directions.Therefore, the concrete mixer of this structure, no Only conveniently moving can also be realized to different directions movement, moreover, stability is good, will not generate inclination.
In the specific embodiment of the invention, the bracket 4 is equipped with lantern ring 41, and the bottom of the rack 1 corresponds to lantern ring 41 positions are equipped with turntable 11, and the turntable 11 is rotatably arranged in lantern ring 41, and ball is equipped between turntable 11 and lantern ring 41.When So, being rotatably assorted for bracket 4 and rack 1 directly can also be realized by bearing.
In the specific embodiment of the invention, 2 discharge port of mixing drum, 21 position is corresponded in the rack 1 and is provided tiltedly with and draws flitch 9, draw flitch 9 close to one end of 2 discharge port 21 of mixing drum and be higher than one end far from discharge port 21, draws flitch 9 and pacify through mounting rack 10 In rack 1, the mounting rack 10 includes first support bar 101, second support bar 102, third support rod 103, and One support rod 101 is located at the lower section of second support bar 102 and third support rod 103, and 101 one end of first support bar is through bolt, spiral shell It is female with draw flitch 9 and connect, the other end is equipped at intervals with several adjustment holes 1011 along its length, and bracket 4 is equipped with mounting base 42, mounting base 42 is equipped with mounting hole, is inserted with connecting column 104 between mounting hole and wherein an adjustment hole 1011;Second support 102 one end of bar with draw flitch 9 and connect through bolt, nut, the other end is rotatably assorted with rack 1;103 one end of third support rod with draw Flitch 9 is connected through bolt, nut, and the other end is also rotatably assorted with rack 1.Due to 2 discharge port 21 of mixing drum height generally all Relatively high, when by manpower trolley to accept concrete, the material of 2 discharge port 21 of mixing drum can be introduced by drawing flitch 9 On manpower trolley;When being transported by other means of transports (such as tractor, lorry), it can will draw flitch 9 and disassemble i.e. Can, use scope is wide, more convenient;By several adjustment holes 1011 of setting, first support bar 101 can be unclamped and draw material Then bolt, nut between plate 9 select different adjustment holes 1011, i.e., the changeable tilt angle for drawing flitch 9 meets not With the needs of haulage vehicle, use scope is wide, easy to adjust.Second support bar 102 is equipped with jack, corresponds to jack in rack 1 Position is equipped with hinge hole, articulated shaft 105 is equipped in jack and hinge hole, 105 one end of articulated shaft is equipped with bending section 1051, another End is equipped with bolt 108;Third support rod 103 and 1 articulated manner of rack and second support bar 102 and 1 articulated manner phase of rack Together, bending section and bolt can prevent articulated shaft generation from sliding axially and fall, and this mounting means, structure is simple, installation, Convenient disassembly.
Mounting rack 10 further includes having the first support arm 106, the second support arm 107,106 one end of the first support arm with second Strut 102 is fixed, and the other end is pressed in rack 1, and 107 one end of the second support arm and third support rod 103 are fixed, the other end It is pressed in rack 1, the first support arm 106, the second support arm 107 can play first support bar 101, second support bar 102 To supporting role well, it is prevented to be deformed.
In the specific embodiment of the invention, the rack 1 is equipped with supporting leg 20, and 20 lower end of supporting leg is support end, on End hingedly cooperates with rack 1, be additionally provided in rack 1 for after the rotation of supporting leg 20 is packed up to supporting leg 20 into line-locked fixed Hyte part.In blender normal use, it can be put down with rotational support leg 20 and be contradicted with ground, so as to blender Entirety plays supporting role well;When mixer, supporting leg 20 can be rotated and be packed up, will propped up by positioning component Support leg 20 locks, easy to use;Supporting leg 20 sets there are two and is located at the two sides of 1 rear end of rack, positioning component packet Drawstring 30 is included, wherein a supporting leg 20 is equipped with retaining ring 201, drawstring 30 be located on retaining ring 201, and drawstring 30 is equipped with lock hook 301, the inside of another supporting leg 20, which is equipped with, hooks slot 202, and the lock hook 301 of drawstring 30 hooks after supporting leg 20 is turned out and packs up to be set Hooking in slot 202, in the specific embodiment of the invention, two supporting legs are symmetrical arranged, be equipped with and hook slot 202, supporting leg 20 to After outer rotation is packed up, it can be hooked in the hook slot of supporting leg 20 by the lock hook of drawstring 30, when blender normal use, The lock hook of drawstring 30 can directly be hooked in the rack 1 of blender, it is easy to use, it is easy to operate;Furthermore hooking slot can be with Mitigate the overall weight of supporting leg 20, saves material.
In the specific embodiment of the invention, the rack 1 be equipped with boom 40, boom 40 be equipped with motor 50, hawser 60, Tensioning wheel 70, tensioning wheel 70 are located at 40 upper end of boom, and 60 one end of hawser is equipped with suspension hook 80, the other end bypass after tensioning wheel 70 with electricity The output end of machine 50 connects, and the driving of motor 50 can sling cement by switch control or remote control, suspension hook 80 Bag is simultaneously passed in feeding funnel 3, is not necessarily to manual handling, time saving and energy saving, easy to operate.Pedestal is additionally provided in the rack 1 12, the lower end of boom 40 is equipped with cylinder 401, and cylinder 401 and pedestal 12 circumferentially rotate cooperation, in this way can with swinging boom, thus The position for changing bag of cement on suspension hook, is able to satisfy the demand of different operating conditions.

Claims (10)

1. a kind of movable concrete stirring machine, including organic frame, rack is equipped with mixing drum and feeding funnel, and feature exists In: it further include having bracket, front axle, hind axle, the bottom of rack is equipped with one group of front wheel, one group of rear roller, and front wheel is premenstrual Wheel shaft is mounted on the two sides of bracket, and the front end of bracket and rack is rotatably assorted, and rear roller is mounted on rear end of rack through hind axle Two sides.
2. movable concrete stirring machine according to claim 1, it is characterised in that: the bracket is equipped with lantern ring, The corresponding set ring position in the bottom of the rack is equipped with turntable, and the turntable is rotatably arranged in lantern ring, turntable and lantern ring it Between be equipped with ball.
3. movable concrete stirring machine according to claim 1 or 2, it is characterised in that: correspondence is stirred in the rack It mixes a discharge port position and is provided tiltedly with and draw flitch, draw flitch close to one end of mixing drum discharge port and be higher than the one of separate discharge port End, draws flitch and is mounted on the rack through mounting rack, mounting rack is detachably connected with rack.
4. movable concrete stirring machine according to claim 3, it is characterised in that: the mounting rack includes first Support rod, second support bar, third support rod, first support bar are located at the lower section of second support bar and third support rod, and first Support rod one end is connect through bolt, nut with flitch is drawn, and the other end is equipped at intervals with several adjustment holes, bracket along its length It is equipped with mounting base, mounting base is equipped with mounting hole, is inserted with connecting column between mounting hole and wherein an adjustment hole;Second support Bar one end with draw flitch and connect through bolt, nut, the other end and gantry rotation cooperate;Third support rod one end and draw flitch through spiral shell Bolt, nut connection, the other end also cooperate with gantry rotation.
5. movable concrete stirring machine according to claim 4, it is characterised in that: second support bar is equipped with jack, Jack position is corresponded in rack and is equipped with hinge hole, and articulated shaft is equipped in jack and hinge hole, articulated shaft one end is equipped with bending section, The other end is equipped with bolt;Third support rod and rack articulated manner and second support bar are identical as rack articulated manner.
6. movable concrete stirring machine according to claim 4 or 5, it is characterised in that: mounting rack further includes having first Support arm, the second support arm, first support arm one end are fixed with second support bar, and the other end compresses on the rack, the second support Arm one end is fixed with third support rod, and the other end also compresses on the rack.
7. movable concrete stirring machine according to claim 1 or 2, it is characterised in that: the rack is equipped with branch Support leg, supporting leg lower end are support end, and upper end hingedly cooperates with rack, are additionally provided in rack for after supporting leg rotation is packed up To supporting leg into line-locked positioning component.
8. movable concrete stirring machine according to claim 7, it is characterised in that: there are two supporting leg is set and difference position In the two sides of rear end of rack, positioning component includes drawstring, and drawstring both ends are respectively equipped with lock hook, and the inside of supporting leg, which is equipped with, to be hooked Slot, the lock hook at drawstring both ends hook after supporting leg is turned out and packs up respectively in the hook slot for being located at supporting leg.
9. movable concrete stirring machine according to claim 1 or 2, it is characterised in that: the rack is equipped with and hangs Arm, boom are equipped with motor, hawser, tensioning wheel, and tensioning wheel is located at boom upper end, and hawser one end is equipped with suspension hook, and the other end bypasses It is connect after tensioning wheel with the output end of motor.
10. movable concrete stirring machine according to claim 9, it is characterised in that: be additionally provided with base in the rack Seat, the lower end of boom are equipped with cylinder, and cylinder and pedestal circumferentially rotate cooperation.
CN201910031377.6A 2019-01-14 2019-01-14 A kind of movable concrete stirring machine Withdrawn CN109624074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910031377.6A CN109624074A (en) 2019-01-14 2019-01-14 A kind of movable concrete stirring machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910031377.6A CN109624074A (en) 2019-01-14 2019-01-14 A kind of movable concrete stirring machine

Publications (1)

Publication Number Publication Date
CN109624074A true CN109624074A (en) 2019-04-16

Family

ID=66061851

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910031377.6A Withdrawn CN109624074A (en) 2019-01-14 2019-01-14 A kind of movable concrete stirring machine

Country Status (1)

Country Link
CN (1) CN109624074A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207465514U (en) * 2017-10-24 2018-06-08 深圳市正强混凝土有限公司 A kind of concrete mixer
CN207654796U (en) * 2017-12-02 2018-07-27 江苏乾元飞达电力设备有限公司 A kind of energy-saving and environment-friendly solid-liquid separating machine
CN209615953U (en) * 2019-01-14 2019-11-12 鲍少权 A kind of movable concrete stirring machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207465514U (en) * 2017-10-24 2018-06-08 深圳市正强混凝土有限公司 A kind of concrete mixer
CN207654796U (en) * 2017-12-02 2018-07-27 江苏乾元飞达电力设备有限公司 A kind of energy-saving and environment-friendly solid-liquid separating machine
CN209615953U (en) * 2019-01-14 2019-11-12 鲍少权 A kind of movable concrete stirring machine

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Application publication date: 20190416

WW01 Invention patent application withdrawn after publication