CN212888274U

CN212888274U - Screw conveyer for production of premixed concrete

Info

Publication number: CN212888274U
Application number: CN202021158292.9U
Authority: CN
Inventors: 王朝淮; 徐春明
Original assignee: Wujiang Hengtai Concrete Products Co ltd
Current assignee: Wujiang Hengtai Concrete Products Co ltd
Priority date: 2020-06-20
Filing date: 2020-06-20
Publication date: 2021-04-06
Anticipated expiration: 2030-06-20

Abstract

The utility model relates to a screw conveyer for production of ready-mixed concrete, which comprises a screw conveyer, wherein the screw conveyer is provided with a feed inlet and a discharge opening, the feed inlet is arranged upwards, a protective square ring for placing cement packaging bags is arranged on the feed inlet along the vertical direction, the top end and the bottom end of the protective square ring are both open, the bottom end of the protective square ring is communicated with the feed inlet, and a cutting device for cutting the cement packaging bags is arranged on the protective square ring; the protection square ring is provided with an isolating device used for isolating raised dust in the protection square ring, the protection square ring is communicated with a fan, an air inlet end of the fan is communicated with the protection square ring, an air outlet end of the fan is communicated with a dust removal box, and the protection square ring is provided with a control device used for controlling the isolating device to isolate the raised dust and then start the fan to remove the dust. The utility model discloses have the effect of environmental protection more in process of production.

Description

Screw conveyer for production of premixed concrete

Technical Field

The utility model belongs to the technical field of the technique of concrete equipment and specifically relates to a screw conveyer is used in production of ready-mixed concrete.

Background

Premixed concrete is also commercial concrete, and the concrete generally uses cement as a cementing material and sand and stone as aggregates; mixing with water (with or without additive and admixture) in a certain proportion, stirring, forming and curing to obtain the cement concrete. Cement is the essential raw and other materials of ready-mixed concrete when production, and cement is generally bagged, when transporting cement through screw conveyer, the staff cuts open the wrapping bag of cement through the cutter, then transports the cement in the bag to screw conveyer's feed inlet department through the spade, and rethread screw conveyer transports cement.

The existing Chinese patent with the publication number of CN209758303U discloses a high-efficiency screw conveyor, which comprises a shell arranged obliquely upwards, wherein two ends of the shell are respectively provided with a feed inlet and a discharge outlet, the feed inlet is arranged at the lower end of the shell and is arranged vertically upwards, and the discharge outlet is arranged at the upper end of the shell and is arranged downwards; still rotate in the casing and be connected with the spirochaeta, thereby still be provided with on the casing and be used for driving the spirochaeta to rotate the speed reducer that carries out the pay-off, the top of feed inlet still is provided with the supporting seat, and the supporting seat passes through a plurality of support column fixed connection on the feed inlet of casing, and the supporting seat includes braced frame, a plurality of parallel arrangement in braced frame's bracing piece on fixed connection on the support column. After setting up the supporting seat, can directly place the cement bag and reinforced on the supporting seat, the supporting seat includes braced frame, and braced frame is last to be provided with ring baffle, and braced frame's lateral wall still is provided with and drives actuating cylinder, drives actuating cylinder's piston rod towards braced frame in, and the piston rod that drives actuating cylinder is on a parallel with the bracing piece setting, still is provided with the cutting edge that is used for cutting the cement wrapping bag on actuating cylinder's the piston rod.

The above prior art solutions have the following drawbacks: because cement is powdered, after cutting the cement wrapping bag through the cutting blade, cement can produce the raise dust at the in-process that falls to the feed inlet by braced frame. Although the annular baffle can play certain effect of blockking to the raise dust, because the top opening of annular baffle, a large amount of raise dusts still can spill the air through the top of annular baffle in, harm the environment, influence staff's healthy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art exists, the utility model aims at providing a screw conveyer is used in production of ready-mixed concrete, and it has the advantage of environmental protection more in process of production.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a screw conveyor for producing premixed concrete comprises a screw conveyor, wherein a feed inlet and a discharge opening are formed in the screw conveyor, the feed inlet is arranged upwards, a protective square ring for placing a cement packaging bag is arranged on the feed inlet in the vertical direction, the top end and the bottom end of the protective square ring are both open, the bottom end of the protective square ring is communicated with the feed inlet, and a cutting device for cutting the cement packaging bag is arranged on the protective square ring; the dust removal device is characterized in that an isolating device used for isolating raised dust in the protecting square ring is arranged on the protecting square ring, the protecting square ring is communicated with a fan, an air inlet end of the fan is communicated with the protecting square ring, an air outlet end of the fan is communicated with a dust removal box, and a control device used for controlling the isolating device to isolate the raised dust and then starting the fan to remove the dust is arranged on the protecting square ring.

Through adopting above-mentioned technical scheme, place at the intra-annular back of protection side at the cement wrapping bag, cutting device cuts the cement wrapping bag, and isolating device can keep apart the raise dust at the intra-annular of protection side, and the fan can be used for removing dust, consequently can keep apart the raise dust through controlling means and then start the fan and remove dust after the raise dust is produced, and then prevent that the raise dust from spilling to the air in, environmental protection more in process of production.

The present invention may be further configured in a preferred embodiment as: the cement packaging bag is characterized in that a plurality of supporting rods are arranged in the protection square ring and are parallel to each other, and the distance between the supporting rods and the top end of the protection square ring is larger than the height of the cement packaging bag in the vertical direction after the cement packaging bag is placed on the supporting rods.

Through adopting above-mentioned technical scheme, a plurality of bracing pieces can be used for placing the cement wrapping bag, and the bracing piece sets up along the horizontal direction, makes to be in the horizontality when placing the cement wrapping bag, prevents the cement wrapping bag landing.

The present invention may be further configured in a preferred embodiment as: the cutting device comprises a cutting motor and two cutting knives, and a motor shaft of the cutting motor is positioned in the protective square ring and below the supporting rod; two the cutting knife all is located between two adjacent bracing pieces, two the one end that the cutting motor was kept away from to the cutting knife all is located the top of bracing piece.

Through adopting above-mentioned technical scheme, the cutting knife is parallel with each bracing piece and is located between two bracing pieces, and the one end that the cutting motor was kept away from to the cutting knife is located the top of bracing piece, and after the cutting motor started, the top that the one end that the cutting motor was kept away from to the cutting knife can be changeed to the bracing piece was cut open the cement wrapping bag.

The present invention may be further configured in a preferred embodiment as: the isolation device comprises an isolation cover, a top cover and a bottom cover which are arranged along the horizontal direction, the top cover is positioned at the top end of the protection square ring, a top end air cylinder is arranged on one side of the top cover, a piston rod of the top end air cylinder is arranged along the horizontal direction and is fixedly connected with the top cover, and the top cover covers the top end of the protection square ring after the piston rod of the top end air cylinder extends out; the bottom cover is positioned at the bottom end of the protection square ring, a bottom end air cylinder is arranged on one side of the bottom cover, a piston rod of the bottom end air cylinder is arranged along the horizontal direction and is fixedly connected with the bottom cover, and the bottom cover covers the bottom end of the protection square ring after the piston rod of the bottom end air cylinder extends out; the isolation cover is positioned between the supporting rod and the top cover, a plurality of dust removal holes are formed in the isolation cover in the vertical direction, the isolation cover is movably arranged in the protection square ring, and the air inlet end of the fan is positioned between the isolation cover and the top cover.

Through adopting above-mentioned technical scheme, the top cap can cover the top of protection square ring through the promotion of top cylinder, and the bottom can cover the feed inlet through the promotion of bottom cylinder, and then keeps apart the raise dust in protection square ring, shifts to screw conveyer back in cement is by the cement wrapping bag in, keeps apart the lid and can restrict empty cement wrapping bag between bracing piece and isolation lid, places the cement wrapping bag and is siphoned away by the fan.

The present invention may be further configured in a preferred embodiment as: the side wall of the protection square ring is provided with an isolation opening for the isolation cover to enter and exit, one side of the isolation cover close to the isolation opening is provided with an isolation cylinder, and a piston rod of the isolation cylinder is arranged along the horizontal direction and is fixedly connected with the isolation cover.

Through adopting above-mentioned technical scheme, keep apart the cylinder and can control isolation lid business turn over isolation mouthful and then with the cement wrapping bag restriction between bracing piece and isolation lid.

The present invention may be further configured in a preferred embodiment as: the control device comprises a controller and a pressure sensor, the controller is positioned on the outer side wall of the protective square ring, the two cutting knives are respectively positioned on two sides of the pressure sensor, and the pressure sensor is positioned on the support rod; the controller is all connected with the motor of pressure sensor, fan, isolation cylinder, top cylinder and bottom cylinder, be provided with the preset pressure value on the controller, the piston rod that the controller is used for controlling the top cylinder when the pressure signal of pressure sensor transmission is greater than the preset pressure value and stretches out, the controller is used for controlling the piston rod that isolation cylinder and bottom cylinder stretch out and control the motor start of fan when the pressure signal of pressure sensor transmission equals the preset pressure value.

Through adopting above-mentioned technical scheme, pressure sensor can sense pressure and give the controller with pressure signal transmission, pressure signal this moment after placing the cement wrapping bag on the bracing piece is greater than preset pressure value, the top cylinder starts, after cement in the cement wrapping bag is whole to be poured into screw conveyer in, when pressure signal equals preset pressure value, keep apart the cylinder, the bottom cylinder starts and the motor of fan can start, protection square ring is in encapsulated situation this moment, the fan can be siphoned away the raise dust.

The present invention may be further configured in a preferred embodiment as: the cutting motor is connected with the controller, and the controller is used for controlling the motor shaft of the cutting motor to rotate for a circle when the pressure signal transmitted by the pressure sensor is greater than a preset pressure value.

Through adopting above-mentioned technical scheme, the back is connected with the controller to the cutting motor, and after the cement wrapping bag was put on the bracing piece, pressure signal was greater than preset pressure value, and the cutting motor rotated a week and cut out the cement wrapping bag this moment the back and stop rotating promptly.

The present invention may be further configured in a preferred embodiment as: the controller is provided with a button, the button is connected with the controller, and the controller is used for controlling the motor of the fan to stop and controlling the piston rods of the isolation cylinder, the top end cylinder and the bottom end cylinder to retract after the button is pressed.

Through adopting above-mentioned technical scheme, press the button and can make the motor of fan stop to keep apart lid, top cap and bottom are opened.

The present invention may be further configured in a preferred embodiment as: the dust removal case includes box and the dust removal drawer with box swing joint.

Through adopting above-mentioned technical scheme, dust removal drawer and box swing joint can take out the dust removal drawer, will raise dust clean up.

The present invention may be further configured in a preferred embodiment as: an organic glass observation window is arranged on the side wall of the protection square ring.

Through adopting above-mentioned technical scheme, can conveniently observe the condition of raise dust clearance in the protection square ring, and then make things convenient for the staff to carry out operation on next step.

To sum up, the utility model discloses a following at least one useful technological effect:

1. through the arrangement of the protective square ring, the cutting device, the isolating device, the fan, the dust removal box and the control device, the raised dust can be contained in the dust removal box, and the purpose of protecting the environment is achieved;

2. through the setting of pressure sensor and controller, can sense the cement wrapping bag and place through controller control isolating device and cutting device start behind the protection square ring through pressure sensor.

Drawings

FIG. 1 is a schematic view showing the overall structure of a screw conveyor for producing ready-mixed concrete according to the present embodiment;

FIG. 2 is a partial exploded view of the screw conveyor for producing ready-mixed concrete shown in the present embodiment;

fig. 3 is a block diagram of a structure for embodying a connection relationship between a controller and each structure shown in this embodiment.

In the figure, 1, a screw conveyer; 11. a feed inlet; 12. a discharge opening; 2. a protective square ring; 21. a support bar; 22. an organic glass observation window; 23. an isolation cover; 231. a dust removal hole; 232. an isolation port; 233. an isolation cylinder; 24. a top cover; 241. a top cylinder; 25. a bottom cover; 251. a bottom cylinder; 252. an inlet and an outlet; 3. cutting the motor; 31. a cutting knife; 4. a fan; 41. a dust removal box; 42. a dust removal drawer; 5. a controller; 51. a pressure sensor; 52. a button; 6. a support frame.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Examples

Referring to fig. 1 and 2, for the utility model discloses a screw conveyer is used in production of ready-mixed concrete, including screw conveyer 1, screw conveyer 1 is last to be provided with feed inlet 11 and discharge opening 12, and feed inlet 11 sets up, and feed inlet 11 is the loudspeaker form, and feed inlet 11 is square along the cross-section of horizontal direction, and the great one end of feed inlet 11 bore just is connected with up along the protection square ring 2 that is used for placing the cement wrapping bag of vertical direction setting, and protection square ring 2 is formed around four rectangular slabs. The top and the bottom of protection square ring 2 are all opened and the bottom communicates with feed inlet 11, and equidistant a plurality of bracing pieces 21 are provided with in the protection square ring 2, and bracing piece 21 is used for placing the cement wrapping bag. The support rods 21 are parallel to each other, and the distance between the support rods 21 and the top end of the protection square ring 2 is larger than the height of a cement packaging bag in the vertical direction after the cement packaging bag is placed on the support rods 21. An organic glass observation window 22 is arranged on the side wall of the protection square ring 2.

Referring to fig. 1 and 2, a cutting device for cutting the cement packing bag is provided on the protection square ring 2. Specifically, cutting device includes cutting motor 3 and two cutting knives 31, and cutting motor 3 is step motor, and the motor shaft of cutting motor 3 passes the lateral wall that protects square ring 2 and is located protection square ring 2 and be located the below of bracing piece 21. Two cutting knives all with 31 cutting motor 3's motor shaft fixed connection, two cutting knives 31 initial state all are located the below of bracing piece 21, when cutting cement package bag, cutting knife 31 all rotates along with the rotation of cutting motor 3's motor shaft, when rotating to vertical up state, two cutting knives all are located the top of bracing piece 21.

Referring to fig. 1 and 2, the protection square ring 2 is provided with an isolating device for isolating raised dust in the protection square ring 2, the isolating device comprises a square isolating cover 23, a top cover 24 and a bottom cover 25 which are arranged along the horizontal direction, one side of the feed inlet 11 is provided with a support frame 6, and the top cover 24, the isolating cover 23 and the bottom cover 25 are sequentially arranged from top to bottom. The top cap 24 is located the top of protection square ring 2, and one side of top cap 24 is provided with top cylinder 241, and top cylinder 241 is located support frame 6, and top cylinder 241 is two effect cylinders, and the piston rod of top cylinder 241 sets up and with top cap 24 fixed connection along the horizontal direction, and the piston rod of top cylinder 241 stretches out the top that back top cap 24 covered protection square ring 2. An inlet and an outlet 252 for the bottom cover 25 to enter and exit the protective square ring 2 are formed in the side wall of the protective square ring 2, a bottom end air cylinder 251 is arranged on one side of the bottom cover 25 close to the inlet and the outlet 252, the bottom end air cylinder 251 is located on the support frame 6, the bottom end air cylinder 251 is a double-acting air cylinder, a piston rod of the bottom end air cylinder 251 is arranged along the horizontal direction and is fixedly connected with the bottom cover 25, and the bottom cover 25 covers the bottom end of the protective square ring 2 after the piston rod.

Referring to fig. 2, evenly be provided with a plurality of dust removal holes 231 along vertical direction on keeping apart the lid 23, keep apart lid 23 activity and set up in protection square ring 2, specifically, set up the isolation mouth 232 that supplies to keep apart lid 23 business turn over on the lateral wall of protection square ring 2, keep apart one side that lid 23 is close to isolation mouth 232 and be provided with isolation cylinder 233, isolation cylinder 233 is located support frame 6, isolation cylinder 233 is double-acting cylinder, isolation cylinder 233's piston rod along the horizontal direction setting and with keep apart lid 23 fixed connection.

Referring to fig. 1 and 2, the side wall of the protection square ring 2 is communicated with a fan 4 through a ventilation pipe, the fan 4 is a dust removal fan, the air inlet end of the fan 4 is communicated with the protection square ring 2, and the air inlet end of the fan 4 is positioned between an isolation cover 23 and a top cover 24. The air outlet end of the fan 4 is communicated with a dust removing box 41, the dust removing box 41 comprises a box body and a dust removing drawer 42 movably connected with the box body, and specifically, an opening at one side of the box body is used for the dust removing drawer 42 to go in and out.

Referring to fig. 1 and 3, a control device for controlling the isolation device to isolate the raised dust and then starting the fan 4 to remove the dust is arranged on the protection square ring 2. The control device comprises a controller 5 and a pressure sensor 51, wherein the controller 5 is positioned on the outer side wall of the protection square ring 2. Pressure sensor 51 is located bracing piece 21, and pressure sensor 51 is located the intermediate position of protection square ring 2, and pressure sensor 51 sets up upwards, and two cutting knives 31 are located pressure sensor 51's both sides respectively. The controller 5 is connected with the pressure sensor 51, the motor of the fan, the isolation cylinder 233, the top cylinder 241, the bottom cylinder 251 and the cutting motor 3, a preset pressure value is preset in the controller 5, and the preset pressure value can be set to be 0.1kg-0.3kg according to different production conditions.

Referring to fig. 1 and 3, the controller 5 is configured to control the piston rod of the top end cylinder 241 to extend and control the motor shaft of the cutting motor 3 to rotate for one circle when the pressure signal transmitted by the pressure sensor 51 is greater than a preset pressure value, and specifically, when the pressure signal transmitted by the pressure sensor 51 is greater than the preset pressure value because the cutting motor 3 is a stepping motor, the controller 5 controls the motor shaft of the cutting motor 3 to rotate for one circle and then stop. The controller 5 is used for controlling the piston rods of the isolation cylinder 233 and the bottom cylinder 251 to extend when the pressure signal transmitted by the pressure sensor 51 is equal to a preset pressure value, and controlling the motor of the fan to start in a delayed manner after the piston rods of the isolation cylinder 233 and the bottom cylinder 251 extend, wherein the delayed time can be set to 1-3 seconds according to specific situations.

Referring to fig. 2 and 3, a button 52 is provided on the controller 5, the button 52 is connected to the controller 5, and the controller 5 is configured to control the motor of the blower to stop after the button 52 is pressed, and control the piston rods of the isolation cylinder 233, the top cylinder 241 and the bottom cylinder 251 to retract in a delayed manner after the motor of the blower stops, wherein the delay time may be set to 1-3 seconds as the case may be. When the piston rods of the isolation cylinder 233 and the bottom cylinder 251 are completely retracted, one end of the isolation cover 23 away from the isolation cylinder 233 is positioned in the isolation opening 232, and one end of the bottom cover 25 away from the bottom cylinder 251 is positioned in the inlet and outlet 252, so that dust can not overflow from the isolation opening 232 and the inlet and outlet 252 in the process of feeding cement from the cement packaging bag to the screw conveyor 1.

The implementation principle of the above embodiment is as follows:

in the initial state, the cutting knife 31 is vertically arranged downwards, the piston rods of the isolation cylinder 233, the top end cylinder 241 and the bottom end cylinder 251 are in a retraction state, and the isolation opening 232 and the inlet and outlet 252 are respectively sealed by the isolation cover 23 and the bottom cover 25.

When transporting cement using the screw conveyor 1, the pressure sensor 51 continuously transmits a pressure value to the controller 5. The cement packaging bag filled with cement is placed on the support rod 21, the pressure value at the moment is larger than the preset pressure value, the piston rod of the top end cylinder 241 extends out to cover the top end of the protection square ring 2, and the cement is prevented from overflowing and scattering in the pouring process. The isolation opening 232 and the inlet and outlet 252 are respectively sealed by the isolation cover 23 and the bottom cover 25, so that cement is prevented from overflowing from the isolation opening 232 and the inlet and outlet 252 in the blanking process. And the motor shaft of cutting motor 3 rotates a week and cuts open the cement wrapping bag and carry out the unloading, pressure value this moment is transmitted for controller 5, when the pressure value equals preset pressure value, then keep apart the piston rod of cylinder 233 and bottom cylinder 251 and stretch out, the motor of fan starts, keep apart lid 23 and inject the cement wrapping bag between keeping apart lid 23 and bracing piece 21, prevent that the cement wrapping bag from being siphoned away by fan 4, bottom 25 keeps apart screw conveyer 1 and protection square ring 2, prevent that the cement that is located screw conveyer 1 is siphoned away by fan 4.

When the dust is absorbed by the fan 4 through the organic glass observation window 22, the button 52 is pressed, the motor of the fan stops at the moment, and the piston rods of the isolation cylinder 233, the top cylinder 241 and the bottom cylinder 251 are retracted.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a screw conveyer is used in production of ready-mixed concrete, includes screw conveyer, be provided with feed inlet (11) and discharge opening (12) on screw conveyer (1), its characterized in that: the cement packaging bag cutting device is characterized in that the feeding hole (11) is arranged upwards, a protection square ring (2) used for placing a cement packaging bag is arranged on the feeding hole (11) in the vertical direction, the top end and the bottom end of the protection square ring (2) are both open, the bottom end of the protection square ring is communicated with the feeding hole (11), and a cutting device used for cutting the cement packaging bag is arranged on the protection square ring (2); be provided with on protection square ring (2) and be used for keeping apart the isolating device in protection square ring (2) with the raise dust, the intercommunication has fan (4) on protection square ring (2), the air intake end and the protection square ring (2) intercommunication of fan (4), the air outlet end intercommunication of fan (4) has dust removal case (41), be provided with on protection square ring (2) and be used for controlling isolating device and keep apart after-starting fan (4) with the raise dust and carry out the controlling means that removes dust.

2. The screw conveyor for production of ready-mixed concrete according to claim 1, characterized in that: be provided with a plurality of bracing pieces (21) in protection square ring (2), it is a plurality of bracing piece (21) all are parallel to each other, the distance between the top of bracing piece (21) and protection square ring (2) is greater than the cement wrapping bag and places the height of back cement wrapping bag along vertical direction on bracing piece (21).

3. The screw conveyor for production of ready-mixed concrete according to claim 2, characterized in that: the cutting device comprises a cutting motor (3) and two cutting knives (31), wherein a motor shaft of the cutting motor (3) is positioned in the protective square ring (2) and below the supporting rod (21); two cutting knife (31) all are located between two adjacent bracing pieces (21), two the one end that cutting knife (31) kept away from cutting motor (3) all is located the top of bracing piece (21).

4. The screw conveyor for production of ready-mixed concrete according to claim 3, characterized in that: the isolation device comprises an isolation cover (23), a top cover (24) and a bottom cover (25) which are arranged along the horizontal direction, the top cover (24) is positioned at the top end of the protection square ring (2), a top end cylinder (241) is arranged on one side of the top cover (24), a piston rod of the top end cylinder (241) is arranged along the horizontal direction and is fixedly connected with the top cover (24), and the piston rod of the top end cylinder (241) extends out of the top end of the protection square ring (2) covered by the top cover (24); the bottom cover (25) is positioned at the bottom end of the protection square ring (2), a bottom end air cylinder (251) is arranged on one side of the bottom cover (25), a piston rod of the bottom end air cylinder (251) is arranged along the horizontal direction and is fixedly connected with the bottom cover (25), and after the piston rod of the bottom end air cylinder (251) extends out, the bottom cover (25) covers the bottom end of the protection square ring (2); keep apart lid (23) and be located between bracing piece (21) and top cap (24), keep apart and be provided with a plurality of dust removal holes (231) along vertical direction on lid (23), keep apart lid (23) activity and set up in protection square ring (2), the air intake end of fan (4) is located and keeps apart between lid (23) and top cap (24).

5. The screw conveyor for production of ready-mixed concrete according to claim 4, characterized in that: offer on the lateral wall of protection square ring (2) and supply isolation lid (23) isolation mouth (232) of business turn over, one side that isolation lid (23) are close to isolation mouth (232) is provided with isolation cylinder (233), the piston rod of isolation cylinder (233) set up and with isolation lid (23) fixed connection along the horizontal direction.

6. The screw conveyor for production of ready-mixed concrete according to claim 5, characterized in that: the control device comprises a controller (5) and a pressure sensor (51), the controller (5) is positioned on the outer side wall of the protective square ring (2), the two cutting knives (31) are respectively positioned on two sides of the pressure sensor (51), and the pressure sensor (51) is positioned on the support rod (21); the fan control device is characterized in that the controller (5) is connected with the pressure sensor (51), a motor of the fan, the isolation cylinder (233), the top cylinder (241) and the bottom cylinder (251), a preset pressure value is arranged on the controller (5), the controller (5) is used for controlling a piston rod of the top cylinder (241) to stretch out when a pressure signal transmitted by the pressure sensor (51) is larger than the preset pressure value, and the controller (5) is used for controlling the piston rods of the isolation cylinder (233) and the bottom cylinder (251) to stretch out and controlling the motor of the fan to start when the pressure signal transmitted by the pressure sensor (51) is equal to the preset pressure value.

7. The screw conveyor for production of ready-mixed concrete according to claim 6, characterized in that: the cutting motor (3) is connected with the controller (5), and the controller (5) is used for controlling the motor shaft of the cutting motor (3) to rotate for a circle when the pressure signal transmitted by the pressure sensor (51) is greater than a preset pressure value.

8. The screw conveyor for production of ready-mixed concrete according to claim 6, characterized in that: the controller (5) is provided with a button (52), the button (52) is connected with the controller (5), and the controller (5) is used for controlling a motor of the fan to stop and controlling piston rods of the isolation cylinder (233), the top end cylinder (241) and the bottom end cylinder (251) to retract after the button (52) is pressed.

9. The screw conveyor for production of ready-mixed concrete according to claim 1, characterized in that: the dust removal box (41) comprises a box body and a dust removal drawer (42) movably connected with the box body.

10. The screw conveyor for production of ready-mixed concrete according to claim 1, characterized in that: an organic glass observation window (22) is arranged on the side wall of the protection square ring (2).