CN214725275U

CN214725275U - Civil engineering mixes earth agitated vessel

Info

Publication number: CN214725275U
Application number: CN202120376889.9U
Authority: CN
Inventors: 吴博; 原菊蒲; 王雷
Original assignee: Wuchang University of Technology
Current assignee: Wuchang University of Technology
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-11-16
Anticipated expiration: 2031-02-07

Abstract

The utility model relates to a mixing equipment for civil construction concrete, which comprises two tanks arranged side by side, and the top of each tank is provided with a sand feeding device, a stone feeding device, a cement feeding device, a stirring motor, a feeding device and a feeding device. Water pipe and concrete admixture feeding port, sand feeding device, stone feeding device and cement feeding device are also equipped with sand metering control device, stone metering control device and cement metering control device to achieve precise control of sand, The ratio of stones to cement; the top of the tank is also provided with a sand feeding device, a stone feeding device and a cement feeding device that can feed into the two tanks independently; the stirring motor drives the stirring device located in the tank to rotate and stir, and the stirring device It includes a forward stirring part and a reverse stirring part with opposite directions of rotation; a cleaning device is also arranged in the tank to clean the inner side wall of the tank; and a controller is also included. It can precisely control the proportion of sand, stone and cement; stir evenly; can clean the inner wall of the tank.

Description

Civil engineering mixes earth agitated vessel

Technical Field

The utility model relates to an equipment for the civil engineering especially relates to a civil engineering mixes earth agitated vessel.

Background

The concrete mixer is a machine for mixing and stirring cement, gravel aggregate and water into a concrete mixture, construction is started on a civil engineering construction site by taking concrete as a center, and the existing concrete mixing equipment cannot accurately control the proportion of sand, gravel and cement, so that the quality of the concrete is unstable; the stirring is not uniform, and the quality of concrete is influenced; the jar body inside wall can agglomerate, needs clean, and the clear effect of current cleaning device is not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a civil engineering mixes earth agitated vessel is provided to solve above-mentioned problem.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a civil engineering concrete mixing device comprises two tank bodies which are arranged side by side, wherein the top of each tank body is provided with a sand feeding device, a stone feeding device, a cement feeding device, a mixing motor, a water inlet pipe and a concrete additive charging port, and the sand feeding device, the stone feeding device and the cement feeding device are respectively internally provided with a sand metering control device, a stone metering control device and a cement metering control device so as to realize accurate control of the proportion of sand, stone and cement; a sand feeding device, a stone feeding device and a cement feeding device which can independently feed materials to the two tank bodies are also arranged above the tank bodies; the stirring motor drives a stirring device positioned in the tank body to stir in a rotating mode, and the stirring device comprises a forward stirring part and a reverse stirring part which are opposite in rotating direction; the tank body is also internally provided with a cleaning device, and when cleaning is needed, the stirring motor drives the cleaning device to rotate so as to clean the inner side wall of the tank body; the device also comprises a controller.

The sand material feeding device comprises a sand feeding pipe and a sand feeding hopper; the stone feeding device comprises a stone feeding pipe and a stone feeding hopper; the cement feeding device comprises a cement feeding pipe and a cement feeding hopper; the sand inlet pipe stone inlet pipe with the fixed connection that the cement inlet pipe all communicates in the top of the jar body, the sand feeder hopper stone feeder hopper with the fixed connection that the cement feeder hopper communicates respectively in the sand inlet pipe stone inlet pipe with the top of cement inlet pipe.

The sand material metering control device comprises a sand opening and closing door and a sand pressure sensor arranged on the sand opening and closing door, the stone metering control device comprises a stone opening and closing door and a stone pressure sensor arranged on the stone opening and closing door, the cement metering control device comprises a cement opening and closing door and a cement pressure sensor arranged on the cement opening and closing door, and the sand opening and closing door, the stone opening and closing door and the cement opening and closing door are respectively hinged in the sand feeding pipe, the stone feeding pipe and the cement feeding pipe and can swing to open and close the sand feeding pipe, the stone feeding pipe and the cement feeding pipe respectively; the sand opening and closing door, the stone opening and closing door and the swing driving mechanism of the cement opening and closing door, the sand pressure sensor, the stone pressure sensor and the cement pressure sensor are all electrically connected with the controller.

The sand feeding device, the stone feeding device and the cement feeding device respectively comprise a sand conveying chute, a stone chute and a cement chute, one end of the sand conveying chute, one end of the stone chute and one end of the cement chute are respectively communicated with an outlet of a sand conveying device, an outlet of a stone conveying device and an outlet of a cement conveying device, and the other end of the sand conveying chute, one end of the stone chute and one end of the cement chute extend into the sand feeding hopper, the stone feeding hopper and the cement feeding hopper on the same tank body; the sand conveying chute, the stone chute and the cement chute are respectively provided with a sand access door, a stone access door and a cement access door which can be opened and closed, and the sand access door, the stone access door and the cement access door are respectively positioned above the sand feed hopper, the stone feed hopper and the cement feed hopper on the other tank body; the sand access door, the stone access door and the drive device of the cement access door are electrically connected with the controller.

The forward stirring part comprises a stirring shaft and stirring blades, the stirring shaft is coaxial with a motor shaft of the stirring motor and is fixedly connected with the stirring motor, and the stirring blades are provided with a plurality of stirring blades which are fixedly connected onto the stirring shaft at uniform intervals.

The reverse stirring part comprises a planetary gear mechanism and a reverse stirring rod connected with the planetary gear mechanism, the reverse stirring rod is arranged along the circumference of the central axis of the stirring shaft at intervals uniformly, and each reverse stirring rod is fixedly connected with stirring blades at intervals uniformly.

The planetary gear mechanism comprises a sun gear, three planet carriers, two gear shafts, planetary gears and a gear ring, the sun gear is coaxially arranged on the stirring shaft, the gear shafts and the planetary gears correspond to each other one by one and are respectively provided with three, the planet carriers are symmetrically arranged on two sides of the sun gear, the planet carriers are fixedly connected with the tank body, the stirring shaft penetrates through the planet carriers, two ends of each gear shaft respectively penetrate through the two planet carriers and are rotatably connected with the two planet carriers, each planetary gear is arranged on the corresponding gear shaft, the central axes of the three gear shafts are parallel to the central axis of the stirring shaft and are distributed in an equilateral triangle, and the gear ring is sleeved outside the three planetary gears and is meshed with the three planetary gears; every reverse puddler all with the periphery fixed connection of ring gear.

The cleaning device comprises a cleaning sleeve, a plurality of cleaning support rods and a plurality of cleaning scraping blades, wherein the cleaning sleeve is sleeved on the stirring shaft, the cleaning support rods and the cleaning scraping blades are uniformly arranged at intervals along the circumferential direction of the central line axis of the stirring shaft and are in one-to-one correspondence, one end of each cleaning support rod is fixedly connected with the periphery of the cleaning sleeve, the other end of each cleaning support rod is fixedly connected with the cleaning scraping blades, and each cleaning scraping blade is matched with the inner side wall of the tank body and is abutted against the inner side wall; and a clutch device is arranged on the stirring shaft and used for selectively fixedly connecting the cleaning sleeve with the stirring shaft.

The clutch device comprises a cleaning vertical rod, a cleaning connecting rod, a cleaning sliding block, a cleaning hydraulic cylinder and a linkage rod, the cleaning vertical rod is coaxially arranged in the stirring shaft and can move along the central axis of the stirring shaft, the two cleaning connecting rods and the two cleaning sliding blocks are symmetrically arranged by taking the central axis of the stirring shaft as a symmetry axis and are in one-to-one correspondence, the cleaning connecting rods and the cleaning sliding blocks are arranged in the stirring shaft, two ends of each cleaning connecting rod are respectively hinged with the cleaning vertical rod and the corresponding cleaning sliding block, the two cleaning sliding blocks can be close to or far away from each other along the direction vertical to the central axis of the stirring shaft, the cleaning hydraulic cylinder is vertically arranged, the cylinder body of the cleaning hydraulic cylinder is fixedly connected to the stirring shaft, and a piston rod of the cleaning hydraulic cylinder is fixedly connected with the cleaning vertical rod through the linkage rod and drives the cleaning vertical rod to vertically move; the cleaning sliding block can move to abut against the inner side wall of the cleaning sleeve; the cleaning hydraulic cylinder is electrically connected with the controller.

The cleaning sliding block is matched with the inner side wall of the cleaning sleeve, a friction block is fixedly connected to one side of the cleaning sliding block, and a friction ring is fixedly connected to the inner side wall of the cleaning sleeve.

The utility model has the advantages that: the proportion of sand, stones and cement can be accurately controlled, and the stable quality of the concrete is ensured; the mixture is stirred evenly, and the quality of the concrete is improved; the cleaning device can effectively clean the inner side wall of the tank body; can simultaneously stir the concrete with different proportions of sand, stones and cement.

Drawings

Fig. 1 is a schematic structural view of a civil engineering concrete mixing plant provided by the present invention;

FIG. 2 is a top plan view of two tanks of the civil concrete mixing plant shown in FIG. 1;

FIG. 3 is a top plan view of a civil concrete mixing plant of FIG. 1;

FIG. 4 is a schematic view of the planetary gear structure and the reverse stirring rod of the civil concrete mixing apparatus shown in FIG. 1;

FIG. 5 is a schematic structural view of a cleaning apparatus of the civil concrete mixing plant shown in FIG. 1;

fig. 6 is a partially enlarged view of a clutch device of the cleaning device at the civil concrete mixing plant a shown in fig. 1.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a tank body, 2, a stirring shaft, 3, a stirring blade, 4, a reverse stirring rod, 5, a gear ring, 6, a cleaning sleeve, 7, a cleaning support rod, 8, a cleaning scraper, 9, a stirring motor, 10, a sand feeding pipe, 11, a sand opening and closing door, 12, a sand pressure sensor, 13, a sand feeding hopper, 14, a sand conveying chute, 15, a sand passage door, 16, a water inlet pipe, 17, a stone opening and closing door, 18, a stone pressure sensor, 19, a stone feeding hopper, 20, a cement opening and closing door, 21, a cement pressure sensor, 22, a cement feeding hopper, 23, a stone chute, 24, a stone passage door, 25, a cement chute, 26, a cement passage door, 27, a sun gear, 28, a planet carrier, 29, a gear shaft, 30, a planet gear, 31, a cleaning vertical rod, 32, a cleaning connecting rod, 33, a cleaning slide block, 34, a cleaning hydraulic cylinder, 35, a linkage rod, 36 and a friction block, 37. friction ring 38 and concrete admixture charging port.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1-6, a civil engineering concrete mixing device comprises two tank bodies 1 arranged side by side, the top of each tank body 1 is provided with a sand feeding device, a stone feeding device, a cement feeding device, a mixing motor 9, a water inlet pipe 16 and a concrete admixture feeding port 38, and the sand feeding device, the stone feeding device and the cement feeding device are respectively provided with a sand metering control device, a stone metering control device and a cement metering control device to realize accurate control of the proportion of sand, stone and cement; a sand feeding device, a stone feeding device and a cement feeding device which can independently feed materials to the two tank bodies 1 are also arranged above the tank bodies 1; the stirring motor 9 drives a stirring device positioned in the tank body 1 to stir in a rotating manner, and the stirring device comprises a forward stirring part and a reverse stirring part which are opposite in rotating direction; a cleaning device is further arranged in the tank body 1, and when cleaning is needed, the stirring motor 9 drives the cleaning device to rotate so as to clean the inner side wall of the tank body 1; the device also comprises a controller.

The sand material feeding device comprises a sand feeding pipe 10 and a sand feeding hopper 13; the stone feeding device comprises a stone feeding pipe and a stone feeding hopper 19; the cement feeding device comprises a cement feeding pipe and a cement feeding hopper 22; sand inlet pipe 10 the stone inlet pipe with the fixed connection that the cement inlet pipe all communicates in the top of jar body 1, sand feeder hopper 13 stone feeder hopper 19 with the fixed connection that cement feeder hopper 22 communicates respectively in sand inlet pipe 10 the stone inlet pipe with the top of cement inlet pipe. The sand inlet pipe 10 the stone inlet pipe with the cement inlet pipe is square pipe, sand feeder hopper 13 stone feeder hopper 19 with cement feeder hopper 22 is the bellmouth form that macrostoma up.

The sand material metering control device comprises a sand opening and closing door 11 and a sand pressure sensor 12 arranged on the sand opening and closing door, the stone metering control device comprises a stone opening and closing door 17 and a stone pressure sensor 18 arranged on the stone opening and closing door, the cement metering control device comprises a cement opening and closing door 20 and a cement pressure sensor 21 arranged on the cement opening and closing door, and the sand opening and closing door 11, the stone opening and closing door 17 and the cement opening and closing door 20 are respectively hinged in the sand feeding pipe 10, the stone feeding pipe and the cement feeding pipe and can respectively swing to open and close the sand feeding pipe 10, the stone feeding pipe and the cement feeding pipe; the sand opening and closing door 11, the stone opening and closing door 17, the swing driving mechanism of the cement opening and closing door 20, the sand pressure sensor 12, the stone pressure sensor 18 and the cement pressure sensor 21 are all electrically connected with the controller. The swing driving mechanism can be a hydraulic cylinder or an air cylinder; the proportion of sand, pebble and cement is set for the controller in advance, the weight of the sand, pebble and cement which need to be added at each time is calculated by the controller, the sand pressure sensor 12, the pebble pressure sensor 18 and the cement pressure sensor 21 detect and enter the sand feed hopper 13, the pebble feed hopper 19 and the weight of the sand, pebble and cement of the cement feed hopper 22, when the weight calculated by the controller is reached, the controller controls the sand conveying device, the pebble conveying device and the cement conveying device to stop conveying, the controller controls the swing driving mechanism to open the sand opening and closing door 11, the pebble opening and closing door 17 and the cement opening and closing door 20, and the sand, pebble and cement pass through the sand feed pipe 10, the pebble feed pipe and the cement feed pipe to enter the tank body 1 so as to accurately control the proportion of the sand, the pebble and the cement.

The sand feeding device, the stone feeding device and the cement feeding device respectively comprise a sand conveying chute 14, a stone chute 23 and a cement chute 25, one end of each of the sand conveying chute 14, the stone chute 23 and the cement chute 25 is respectively communicated with an outlet of a sand conveying device, a stone conveying device and a cement conveying device, and the other end of each of the sand conveying chute 14, the stone chute 23 and the cement chute 25 extends into the sand feeding hopper 13, the stone feeding hopper 19 and the cement feeding hopper 22 on the same tank body 1; the sand conveying chute 14, the pebble chute 23 and the cement chute 25 are respectively provided with an openable sand access door 15, a pebble access door 24 and a cement access door 26, and the sand access door 15, the pebble access door 24 and the cement access door 26 are respectively positioned above the sand feed hopper 13, the pebble feed hopper 19 and the cement feed hopper 22 on the other tank body 1; the drives for the sand access door 15, the gravel access door 24 and the cement access door 26 are electrically connected to the controller. The driving device can be a hydraulic cylinder or an air cylinder, the controller controls the opening and closing of the sand passage door 15, the stone passage door 24 and the cement passage door 26 according to requirements, when the sand passage door 15, the stone passage door 24 and the cement passage door 26 are closed, sand, stone and cement respectively enter the sand feed hopper 13, the stone feed hopper 19 and the cement feed hopper 22 which are positioned at the tail ends through the sand conveying chute 14, the stone chute 23 and the cement chute 25, and when the sand passage door 15, the stone passage door 24 and the cement passage door 26 are opened, sand, stone and cement respectively enter the sand feed hopper 13, the stone feed hopper 19 and the cement feed hopper 22 which are positioned at the middle section through the sand conveying chute 14, the stone chute 23 and the cement chute 25 so as to adapt to different proportions of sand, stone and cement mixed in the two tank bodies 1.

The forward stirring part comprises a stirring shaft 2 and stirring blades 3, the stirring shaft 2 is coaxial with a motor shaft of the stirring motor 9, and the stirring blades 3 are provided with a plurality of stirring blades which are uniformly and alternately fixedly connected onto the stirring shaft 2.

Reverse stirring part includes planetary gear mechanism and the reverse puddler 4 of being connected with it, reverse puddler 4 is followed the even spaced circumference of (mixing) shaft 2 the central axis is equipped with a plurality ofly, every equal spaced fixedly connected with is a plurality of on the reverse puddler 4 stirring vane 3. Reverse puddler 4 is located the periphery of (mixing) shaft 2 and is equipped with a plurality ofly, and direction of rotation is opposite with (mixing) shaft 2, (mixing) shaft 2 and reverse puddler 4 cooperate the stirring simultaneously to improve stirring effect, make more even of stirring.

The planetary gear mechanism includes a sun gear 27, a carrier 28, gear shafts 29, planetary gears 30, and a ring gear 5, the sun gears 27 are coaxially arranged on the stirring shaft 2, the gear shafts 29 and the planetary gears 30 are in one-to-one correspondence and are respectively provided with three, the two planet carriers 28 are symmetrically arranged at two sides of the sun gear 27, the planet carriers 28 are fixedly connected with the tank body 1, the stirring shaft 2 penetrates through the planetary carriers 28, two ends of each gear shaft 29 penetrate through the two planetary carriers 28 respectively and are connected with the two planetary carriers 28 in a rotating mode, each planetary gear 30 is installed on the corresponding gear shaft 29, the central axes of the three gear shafts 29 are all parallel to the central axis of the stirring shaft 2 and are distributed in an equilateral triangle shape, the gear ring 5 is sleeved outside the three planetary gears 30 and is meshed with the three planetary gears 30; each reverse stirring rod 4 is fixedly connected with the periphery of the gear ring 5. The planet carrier 28 is in a triangular plate shape and is fixedly connected with the tank body 1 through a rod piece, the stirring shaft 2 is provided with an axial positioning component to axially position the two planet carriers 28 on the stirring shaft 2, so that the sun gear 27 is axially positioned on the stirring shaft 2, the axial positioning component can be a shaft shoulder, the planet carrier 28 is fixedly connected with a limiting block to limit the axial displacement of the gear ring 5 on the stirring shaft 2, the axial positioning is realized, the limiting block is abutted against the end surface of the gear ring 5, and the three gear shafts 29 are also axially positioned on the planet carrier 28; the planetary gear mechanism is utilized to realize that the reverse stirring rods 4 rotate reversely around the stirring shaft 2 simultaneously, the structure is compact, the volume is small, the weight is light, the transmission ratio is large, the efficiency is high, the power loss is small, the transmission balance and the shock and vibration resistance are strong, the volume of the mixed soil is ensured by reserving other functional parts when the volume in the tank body 1 is limited, the space volume is saved due to the characteristics of compact structure, small volume and light weight of the planetary gear mechanism, the large power is needed in the stirring process of the mixed soil, the power guarantee of stirring is facilitated due to the characteristics of large transmission ratio, high efficiency and small power loss of the planetary gear mechanism, sand and stones are contained in the mixed soil, the reverse stirring rods 4 rotate reversely around the stirring shaft 2 simultaneously, the shock and vibration are easy to generate, the transmission balance of the planetary gear mechanism and the strong shock and vibration resistance are favorable for guaranteeing the stable stirring of the mechanism, avoid whole equipment vibration, also can reduce the impact vibration of (mixing) shaft 2 and agitator motor 9, improve the life of each part.

The cleaning device comprises a cleaning sleeve 6, a plurality of cleaning support rods 7 and a plurality of cleaning scraping blades 8, the cleaning sleeve 6 is sleeved on the stirring shaft 2, the cleaning support rods 7 and the cleaning scraping blades 8 are uniformly arranged at intervals along the circumferential direction of the central line axis of the stirring shaft 2 and are in one-to-one correspondence, one end of each cleaning support rod 7 is fixedly connected with the periphery of the cleaning sleeve 6, the other end of each cleaning support rod 7 is fixedly connected with the cleaning scraping blades 8, and each cleaning scraping blade 8 is matched with the inner side wall of the tank body 1 and is abutted against the inner side wall; the stirring shaft 2 is provided with a clutch device for selectively fixedly connecting the cleaning sleeve 6 with the stirring shaft 2.

The clutch device comprises a cleaning vertical rod 31, a cleaning connecting rod 32, a cleaning sliding block 33, a cleaning liquid hydraulic cylinder 34 and a linkage rod 35, the cleaning vertical rod 31 is coaxially arranged in the stirring shaft 2 and can move along the central axis thereof, the cleaning connecting rods 32 and the cleaning sliding blocks 33 are symmetrically arranged in two and one-to-one correspondence with the central axis of the stirring shaft 2 as a symmetry axis, the cleaning connecting rods 32 and the cleaning sliding blocks 33 are arranged in the stirring shaft 2, two ends of each cleaning connecting rod 32 are respectively hinged with the cleaning vertical rod 31 and the corresponding cleaning sliding block 33, the two cleaning sliding blocks 33 can be close to or far away from each other along the direction perpendicular to the central axis of the stirring shaft 2, the cleaning hydraulic cylinder 34 is vertically arranged, the cylinder body of the cleaning hydraulic cylinder is fixedly connected to the stirring shaft 2, and the piston rod of the cleaning hydraulic cylinder 34 is fixedly connected with the cleaning vertical rod 31 through the linkage rod 35 and drives the cleaning vertical rod 31 to vertically move; the cleaning slider 33 can be moved into abutment with the inner side wall of the cleaning sleeve 6; the cleaning fluid pressure cylinder 34 is electrically connected to the controller. A vertical groove and a horizontal groove are formed in the stirring shaft 2, the vertical groove and the horizontal groove are communicated through an arc groove, a linkage rod groove is further formed in the stirring shaft 2, when the inner side wall of the tank body 1 needs to be cleaned, the controller controls the cleaning hydraulic cylinder 34 to drive the linkage rod 35 to vertically move downwards in the linkage rod groove, the linkage rod 35 drives the cleaning vertical rod 31 to move downwards along the vertical groove, the cleaning connecting rod 32 moves in the arc groove, the two cleaning sliders 33 move along the horizontal groove to be away from each other and extend out of the stirring shaft 2 to be abutted against the inner side wall of the cleaning sleeve 6, the cleaning sliders 33 rotate along with the stirring shaft 2, the cleaning sliders 33 are temporarily and fixedly connected into a whole due to being abutted against the inner side wall of the cleaning sleeve 6, the cleaning sleeve 6 also rotates along with the cleaning sliders 33 and the stirring shaft 2, so as to drive the cleaning supporting rod 7 and the cleaning scraper 8 to rotate, the cleaning scraper 8 is matched with and abutted against the inner side wall of the tank body 1, the caking on the inner side wall of the tank body 1 can be scraped; only when the cleaning is needed, the cleaning sleeve 6 rotates along with the cleaning slide block 33 and the stirring shaft 2, so that the energy consumption is saved, the power loss is reduced, and the clutch device is stable and reliable in structure.

The cleaning sliding block 33 is matched with the inner side wall of the cleaning sleeve 6, a friction block 36 is fixedly connected to one side of the cleaning sliding block 33, and a friction ring 37 is fixedly connected to the inner side wall of the cleaning sleeve 6. Clean slider 33 with the inside wall phase-match of clean sleeve 6 can increase clean slider 33 with the effective area of contact of clean sleeve 6 inside wall, rubbing block 36 and friction ring 37 make clean slider 33 with the frictional force of clean sleeve 6 inside wall contact is bigger, connects more firmly, and rubbing block 36 and friction ring 37 are friction material and make, and the surface roughness.

A discharge hole is arranged below the tank body 1, water is added into the tank body 1 from a water inlet pipe 16, and concrete admixture is added from a concrete admixture feeding hole 38.

The fixed connection referred to in this application may be a threaded connection, a welded connection or an adhesive connection.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The civil engineering concrete stirring equipment is characterized by comprising two tank bodies (1) which are arranged side by side, wherein the top of each tank body (1) is provided with a sand feeding device, a stone feeding device, a cement feeding device, a stirring motor (9), a water inlet pipe (16) and a concrete additive feeding port (38), and sand metering control devices, stone metering control devices and cement metering control devices are further arranged in the sand feeding device, the stone feeding device and the cement feeding device respectively so as to realize accurate control of the proportion of sand, stone and cement; a sand feeding device, a stone feeding device and a cement feeding device which can independently feed materials to the two tank bodies (1) are also arranged above the tank bodies (1); the stirring motor (9) drives a stirring device positioned in the tank body (1) to stir in a rotating manner, and the stirring device comprises a forward stirring part and a reverse stirring part which are opposite in rotating direction; a cleaning device is further arranged in the tank body (1), and when cleaning is needed, the stirring motor (9) drives the cleaning device to rotate so as to clean the inner side wall of the tank body (1); the device also comprises a controller.

2. A civil concrete mixing plant according to claim 1, characterised in that said sand feed means comprise a sand feed pipe (10) and a sand feed hopper (13); the stone feeding device comprises a stone feeding pipe and a stone feeding hopper (19); the cement feeding device comprises a cement feeding pipe and a cement feeding hopper (22); sand inlet pipe (10) stone inlet pipe with the fixed connection that the cement inlet pipe all communicates in the top of jar body (1), sand feeder hopper (13) stone feeder hopper (19) with the fixed connection that cement feeder hopper (22) communicates respectively in sand inlet pipe (10) stone inlet pipe with the top of cement inlet pipe.

3. The civil-engineering concrete mixing equipment is characterized in that the sand material metering and controlling device comprises a sand opening and closing door (11) and a sand pressure sensor (12) arranged on the sand opening and closing door, the stone metering and controlling device comprises a stone opening and closing door (17) and a stone pressure sensor (18) arranged on the stone opening and closing door, the cement metering and controlling device comprises a cement opening and closing door (20) and a cement pressure sensor (21) arranged on the cement opening and closing door, and the sand opening and closing door (11), the stone opening and closing door (17) and the cement opening and closing door (20) are respectively hinged in the sand feeding pipe (10), the stone feeding pipe and the cement feeding pipe and can respectively swing to open and close the sand feeding pipe (10), the stone feeding pipe and the cement feeding pipe; the sand opening and closing door (11), the stone opening and closing door (17) and the swing driving mechanism of the cement opening and closing door (20), the sand pressure sensor (12), the stone pressure sensor (18) and the cement pressure sensor (21) are all electrically connected with the controller.

4. The civil engineering concrete mixing plant as claimed in claim 2, wherein the sand feeding device, the gravel feeding device and the cement feeding device respectively comprise a sand conveying chute (14), a gravel chute (23) and a cement chute (25), one end of the sand conveying chute (14), the gravel chute (23) and the cement chute (25) is respectively communicated with the outlet of a sand conveying device, a gravel conveying device and a cement conveying device, and the other end of the sand conveying chute, the gravel conveying device and the cement chute respectively extends into the sand hopper (13), the gravel hopper (19) and the cement hopper (22) on the same tank body (1); the sand conveying chute (14), the stone chute (23) and the cement chute (25) are respectively provided with a sand access door (15), a stone access door (24) and a cement access door (26) which can be opened and closed, and the sand access door (15), the stone access door (24) and the cement access door (26) are respectively positioned above the sand feed hopper (13), the stone feed hopper (19) and the cement feed hopper (22) on the other tank body (1); the sand access door (15), the gravel access door (24), and the drive means of the cement access door (26) are electrically connected to the controller.

5. The civil concrete mixing plant according to claim 1, wherein the forward mixing component comprises a mixing shaft (2) and mixing blades (3), the mixing shaft (2) is fixedly connected with a motor shaft of the mixing motor (9) coaxially, and the mixing blades (3) are fixedly connected with the mixing shaft (2) at a plurality of uniform intervals.

6. A civil concrete mixing plant according to claim 5, characterized in that said reverse mixing elements comprise a planetary gear mechanism and a reverse mixing rod (4) connected thereto, said reverse mixing rod (4) being provided in plurality at uniform intervals along the circumference of the central axis of said mixing shaft (2), each of said reverse mixing rod (4) being fixedly connected with a plurality of said mixing blades (3) at uniform intervals.

7. The civil engineering concrete mixing equipment according to claim 6, wherein the planetary gear mechanism comprises a sun gear (27), a planet carrier (28), a gear shaft (29), a planetary gear (30) and a gear ring (5), the sun gear (27) is coaxially installed on the mixing shaft (2), the gear shaft (29) and the planetary gear (30) are in one-to-one correspondence and are respectively provided with three, the planet carrier (28) is provided with two and is symmetrically arranged at two sides of the sun gear (27), the planet carrier (28) is fixedly connected with the tank body (1), the mixing shaft (2) penetrates through the planet carrier (28), two ends of each gear shaft (29) respectively penetrate through the two planet carriers (28) and are rotatably connected with the same, each planetary gear (30) is installed on the corresponding gear shaft (29), the central axes of the three gear shafts (29) are all parallel to the central axis of the stirring shaft (2) and are distributed in an equilateral triangle shape, and the gear ring (5) is sleeved outside the three planetary gears (30) and is meshed with the three planetary gears (30); each reverse stirring rod (4) is fixedly connected with the periphery of the gear ring (5).

8. The civil-engineering concrete stirring equipment as claimed in claim 5, wherein the cleaning device comprises a cleaning sleeve (6), a cleaning support rod (7) and a cleaning scraping blade (8), the cleaning sleeve (6) is sleeved on the stirring shaft (2), the cleaning support rod (7) and the cleaning scraping blade (8) are uniformly arranged at intervals along the circumferential direction of the central line axis of the stirring shaft (2) and are in one-to-one correspondence, one end of each cleaning support rod (7) is fixedly connected with the periphery of the cleaning sleeve (6), the other end of each cleaning support rod (7) is fixedly connected with the cleaning scraping blade (8), and each cleaning scraping blade (8) is matched with and abutted against the inner side wall of the tank body (1); the stirring shaft (2) is provided with a clutch device for selectively fixedly connecting the cleaning sleeve (6) with the stirring shaft (2).

9. The civil engineering concrete stirring equipment as claimed in claim 8, wherein the clutch device comprises a cleaning vertical rod (31), a cleaning connecting rod (32), a cleaning slider (33), a cleaning hydraulic cylinder (34) and a linkage rod (35), the cleaning vertical rod (31) is coaxially arranged in the stirring shaft (2) and can move along the central axis thereof, the cleaning connecting rod (32) and the cleaning slider (33) are symmetrically arranged in two and one-to-one correspondence with the central axis of the stirring shaft (2) as a symmetry axis, the cleaning connecting rod (32) and the cleaning slider (33) are arranged in the stirring shaft (2), the two ends of each cleaning connecting rod (32) are respectively hinged with the cleaning vertical rod (31) and the corresponding cleaning slider (33), and the two cleaning sliders (33) can be close to or far away from each other along a direction perpendicular to the central axis of the stirring shaft (2), the cleaning hydraulic cylinder (34) is vertically arranged, the cylinder body of the cleaning hydraulic cylinder is fixedly connected to the stirring shaft (2), and the piston rod of the cleaning hydraulic cylinder (34) is fixedly connected with the cleaning vertical rod (31) through the linkage rod (35) and drives the cleaning vertical rod to vertically move; the cleaning slide block (33) can move to abut against the inner side wall of the cleaning sleeve (6); the cleaning hydraulic cylinder (34) is electrically connected with the controller.

10. The civil concrete mixing plant according to claim 9, characterized in that the cleaning slider (33) is matched with the inner side wall of the cleaning sleeve (6), a friction block (36) is fixedly connected to one side of the cleaning slider (33), and a friction ring (37) is fixedly connected to the inner side wall of the cleaning sleeve (6).