CN112811862A

CN112811862A - Concrete for improving strength of PC (polycarbonate) member and preparation method thereof

Info

Publication number: CN112811862A
Application number: CN202110298586.4A
Authority: CN
Inventors: 林锦全
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-05-18

Abstract

The invention discloses concrete for improving the strength of a PC (polycarbonate) member and a preparation method thereof, and relates to the technical field of concrete preparation. The concrete for improving the strength of the PC member comprises the following components, by mass, 300 parts of cement and 620 parts of cement; 500 portions and 830 portions of sand with the mud content of less than 2 percent; 150-300 parts of crushed stone with the particle size of 5-20 mm; 70-100 parts of mineral powder with the loss on ignition of 1.55%; 70-120 parts of fly ash with the loss on ignition of 4.72%; 40-85 parts of an active agent; 50-90 parts of water reducing agent and 200-450 parts of water, and pouring the prepared cement, sand, broken stone and water into a stirrer according to the parts by mass for fully stirring and mixing to obtain a first-stage mixture. According to the concrete for improving the strength of the PC member and the preparation method thereof, the secondary mixing mechanism is involved in the concrete mixing process and can synchronously operate with the primary mixing mechanism to effectively push the solid or liquid water reducing agent into the concrete in the overturning process, so that the combination effect of the water reducing agent and the concrete is fully improved, and the water reducing purpose is achieved.

Description

Concrete for improving strength of PC (polycarbonate) member and preparation method thereof

Technical Field

The invention relates to the technical field of concrete preparation, in particular to concrete for improving the strength of a PC (polycarbonate) member and a preparation method thereof.

Background

The PC component comprises a prefabricated reinforced concrete column foundation, a prefabricated steel structure steel column foundation, a street lamp billboard column reinforced concrete foundation and a prefabricated floor slab. The concrete prefabricated member is widely applied to the fields of buildings, traffic, water conservancy and the like, and plays an important role in national economy.

After the cement is added with water and stirred, a flocculent structure is generated, a lot of mixing water is wrapped in the flocculent structure, so that the workability of fresh concrete is reduced, the required workability of concrete mixture in construction is maintained, the using amount of the concrete mixture is required to be correspondingly increased, and excessive pores are formed in a cement stone structure, so that the strength of a PC member is reduced, and the PC member is required to be destroyed and manufactured again.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the concrete for improving the strength of the PC member and the preparation method thereof, and the water reducing agent can be uniformly added and fully mixed in the cement mixing process to remove free water in a cement flocculating constituent, thereby realizing the purpose of improving the strength of the final PC member.

In order to achieve the purpose, the invention is realized by the following technical scheme: the concrete for improving the strength of the PC member comprises the following components, by mass, 300 parts of cement and 620 parts of cement; 500 portions and 830 portions of sand with the mud content of less than 2 percent; 150-300 parts of crushed stone with the particle size of 5-20 mm; 70-100 parts of mineral powder with the loss on ignition of 1.55%; 70-120 parts of fly ash with the loss on ignition of 4.72%; 40-85 parts of an active agent; 50-90 parts of water reducing agent and 200-450 parts of water.

A method for preparing concrete for improving the strength of PC members comprises the following steps,

and S1, pouring the prepared cement, sand, broken stone and water into a stirrer in parts by mass, and fully stirring and mixing to obtain a first-level mixture.

And S2, pouring the mineral powder and the fly ash with the ignition loss reaching the standard into the stirrer, stirring and mixing again, and fully mixing to obtain a secondary mixture.

And S3, discharging the secondary mixture into the auxiliary mixing device through a discharge port of the stirrer, pouring the active agent and the water reducing agent into the auxiliary mixing device, and stirring and mixing to obtain a final mixture.

And S4, discharging the final mixture from the auxiliary agent mixing device, standing and curing to obtain the finished concrete.

Preferably, the auxiliary agent mixing arrangement includes organism, puddler, pull the moving mechanism and suction mechanism, the top fixedly connected with of organism communicates the income hopper of self inner chamber, the back fixed mounting of organism has driving motor, and driving motor's output shaft runs through the interior back wall of organism and the rear end of fixedly connected with bull stick, the front end of bull stick is pegged graft at the interior antetheca of organism, fixedly connected with array follows the puddler of its axis equidistance distribution on the bull stick, puddler four are a set of and are equidistance and encircle the form fixed connection on the bull stick, equal fixed mounting has two in the every puddler pulls the moving mechanism, several suction mechanism is along bull stick axis direction equidistance fixed mounting in the organism, and every suction mechanism is located between every two sets of adjacent puddlers.

Preferably, the traction moving mechanism comprises a spherical shell with open left and right sides, elastic soft ribs, elastic membranes, fixed ring pieces, magnetic columns, connecting pieces, elastic balls, a first-stage mixing mechanism and a second-stage mixing mechanism, wherein the upper and lower sides of the spherical shell are fixedly connected with a stirring rod through the elastic soft ribs, openings for accommodating the spherical shell and penetrating through the left and right sides of the spherical shell are formed in the stirring rod, one ends of the elastic soft ribs, far away from the spherical shell, are fixedly connected with the inner walls of the openings, two elastic membranes are in a group and are respectively adhered to and sealed at the openings on the left and right sides of the spherical shell, the fixed ring pieces are fixedly connected to the middle of an inner cavity of the spherical shell, the magnetic columns are located in the fixed ring pieces, the connecting pieces are fixedly connected to the left and right ends of the magnetic columns, the connecting pieces are fixedly connected with connecting rods, one ends of the connecting rods, back to the, one end of the connecting rod positioned on the right side of the spherical shell is fixedly provided with a first-stage mixing mechanism, and one end of the connecting rod positioned on the left side of the spherical shell is fixedly provided with a second-stage mixing mechanism.

Preferably, the primary mixing mechanism comprises a first ball body, a rotating shaft, a rotating ring, a pure iron ball, extrusion protrusions, mounting ports, a flexible membrane, iron beads and a connecting block, the first ball body is fixedly connected with the connecting rod positioned on the right side of the spherical shell, the upper end and the lower end of the rotating shaft are respectively inserted into the upper side and the lower side of the inner wall of the first ball body, a torsional spring is sleeved at the joint of the rotating shaft and the first ball body, the elasticity of the torsional spring is larger than the sum of the weights of the rotating shaft, the rotating ring, the pure iron ball and the extrusion protrusions, the rotating ring is sleeved on the rotating shaft, the pure iron ball is fixedly connected to the right side of the inner ring of the rotating ring, the extrusion protrusions are fixedly connected to the outer ring of the rotating ring in an equidistant surrounding manner, the mounting ports are arranged in the first ball body in an equidistant surrounding manner and penetrate through the outer surface of the first ball body, one side of, and one side of the flexible membrane that the several iron beads back on the back of the body in same group all with connecting block fixed connection, the connecting block extends to in the first spheroid on the back of the body one side of iron beads back on the back of the body.

Preferably, the mechanism is blended to second grade includes second spheroid, cross elastic rib, hollow iron ball, tensile soft muscle, impact ball and annular bag, the second spheroid with be located the left connecting rod fixed connection of spherical shell, the four ends of cross elastic rib all with the spheroidal inner wall fixed connection of second, and hollow iron ball cup joints at the middle part of cross elastic rib, the quantity of tensile soft muscle is four, and four tensile soft muscle are the equidistance and encircle the surface of form fixed connection at hollow iron ball, the equal fixedly connected with impact ball of the one end of tensile soft muscle hollow iron ball mutually in the back of the body, and bond in the second spheroid have four to be the annular bag that the equidistance encircles the form and distribute, four impact balls are located four annular bags respectively.

Preferably, the attraction mechanism comprises a first ring body, a second ring body and magnetic balls, the first ring body is fixedly connected with the second ring body through a fixing rod, the first ring body and the second ring body are internally embedded with four magnetic balls distributed in an equidistant surrounding manner, and the first ring body and the second ring body are respectively positioned behind two traction moving mechanisms on the stirring rod.

The invention provides concrete for improving the strength of a PC member and a preparation method thereof. The method has the following beneficial effects:

(1) the concrete for improving the strength of the PC member and the preparation method thereof utilize the cooperation of the first-stage mixing mechanism and the second-stage mixing mechanism in the mixing device, can be added with the water reducing agent in the concrete preparation process, adapt to the form of a solid or liquid water reducing agent, improve the mixing effect of the solid or liquid water reducing agent and the concrete according to the distribution characteristics of the solid and liquid water reducing agent, and fully promote the release of free water in a cement flocculating agent to achieve the effect of reducing the water content in the concrete, thereby being beneficial to reducing the pores formed in the concrete member.

(2) According to the concrete for improving the strength of the PC member and the preparation method thereof, the solid water reducing agent is added into the concrete and then the first-stage mixing mechanism operates, so that the concrete can be effectively stirred to be mixed with the water reducing agent in the process of mixing the concrete, and the condition that the water reducing agent is gathered at one position after being mixed into the concrete to cause uneven distribution to influence the water reducing effect is avoided.

(3) According to the concrete for improving the strength of the PC member and the preparation method thereof, the primary mixing mechanism intervenes in the mixing work of the concrete, the degree of the uniformity of the distribution of the water reducing agent in the concrete is gradually improved along with the increase of the mixing time, meanwhile, the primary mixing mechanism can be synchronously operated all the time in the working process of the mixing device, and the movement direction of the concrete in the turnover process is continuously enlarged, so that the uniformity of the distribution of the solid water reducing agent in the concrete is further improved.

(4) According to the concrete for improving the strength of the PC member and the preparation method thereof, after the liquid water reducing agent is added into the concrete, the operation of the secondary mixing mechanism is carried out, the internal movement direction of the concrete can be further expanded in the process of mixing the concrete, so that the liquid water reducing agent fully permeates into a cement flocculating constituent in the concrete, and the phenomenon that the liquid water reducing agent is blocked on the surface due to poor permeability of the concrete is avoided.

(5) According to the concrete for improving the strength of the PC member and the preparation method thereof, the secondary mixing mechanism is involved in the concrete mixing process, and can synchronously operate with the primary mixing mechanism to effectively push the solid or liquid water reducing agent into the concrete in the overturning process, so that the combination effect of the water reducing agent and the concrete is fully improved, and the purpose of reducing water is achieved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front cross-sectional view of the structure of the present invention;

FIG. 3 is an enlarged view of the structure of FIG. 2;

FIG. 4 is a front cross-sectional view of a primary mixing mechanism of the present invention;

FIG. 5 is a front cross-sectional view of the secondary mixing mechanism of the present invention;

fig. 6 is a front cross-sectional view of the suction mechanism of the present invention.

In the figure: 1 machine body, 2 stirring rods, 3 traction moving mechanism, 4 suction mechanism, 31 spherical shell, 32 elastic soft rib, 33 elastic membrane, 34 fixed ring sheet, 35 magnetic column, 36 connecting sheet, 37 elastic ball, 38 primary mixing mechanism, 39 secondary mixing mechanism, 381 first ball body, 382 rotating shaft, 383 rotating ring, 384 pure iron ball, 385 extrusion protrusion, 386 mounting opening, 387 flexible membrane, 388 iron ball, 389 connecting block, 391 second ball body, 392 cross elastic rib, 393 hollow iron ball, tensile soft rib, 395 ball, 396 annular capsule, 41 first ring body, 42 second ring body, 394 magnetic ball.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Referring to fig. 1-6, the present invention provides a technical solution: the concrete for improving the strength of the PC member comprises the following components, by mass, 300 parts of cement and 620 parts of cement; 500 portions and 830 portions of sand with the mud content of less than 2 percent; 150-300 parts of crushed stone with the particle size of 5-20 mm; 70-100 parts of mineral powder with the loss on ignition of 1.55%; 70-120 parts of fly ash with the loss on ignition of 4.72%; 40-85 parts of an active agent; 50-90 parts of water reducing agent and 200-450 parts of water.

s1, pouring the prepared cement, sand, broken stone and water into a stirrer in parts by mass, and fully stirring and mixing to obtain a primary mixture;

s2, pouring the mineral powder and the fly ash with ignition loss reaching the standard into the stirrer to stir and mix again, and fully mixing to obtain a secondary mixture;

s3, discharging the secondary mixture into an auxiliary mixing device through a discharge port of the stirrer, pouring an active agent and a water reducing agent into the auxiliary mixing device, and stirring and mixing to obtain a final mixture;

Auxiliary agent mixing arrangement includes organism 1, puddler 2, pull movable mechanism 3 and attraction mechanism 4, the go into hopper of organism 1's top fixedly connected with intercommunication self inner chamber, the back fixed mounting of organism 1 has driving motor, and driving motor's output shaft runs through the interior back wall of organism 1 and the rear end of fixedly connected with bull stick, peg graft at organism 1's interior antetheca at the front end of bull stick, fixedly connected with array follows the puddler 2 of its axis equidistance distribution on the bull stick, puddler 2 four are a set of and are equidistance and encircle the form fixed connection on the bull stick, equal fixed mounting has two pull movable mechanism 3 in every puddler 2, several attraction mechanism 4 is along bull stick axis direction equidistance fixed mounting in organism 1, and every attraction mechanism 4 is located between every two sets of adjacent puddler 2.

The traction moving mechanism 3 comprises a spherical shell 31 with open left and right sides, an elastic soft rib 32, an elastic membrane 33, a fixed ring sheet 34, a magnetic column 35, a connecting sheet 36, an elastic ball 37, a first-stage mixing mechanism 38 and a second-stage mixing mechanism 39, wherein the upper side and the lower side of the spherical shell 31 are fixedly connected with a stirring rod 2 through the elastic soft rib 32, the stirring rod 2 is internally provided with an opening for accommodating the spherical shell 31 and penetrating through the left side and the right side of the stirring rod, one end of the elastic soft rib 32 far away from the spherical shell 31 is fixedly connected with the inner wall of the opening, two elastic membranes 33 are in a group and are respectively adhered to and sealed at the openings at the left side and the right side of the spherical shell 31, the fixed ring sheet 34 is fixedly connected to the middle part of the inner cavity of the spherical shell 31, the magnetic column 35 is positioned in the fixed ring sheet 34, the left end and the right end of the, one ends of the two connecting rods opposite to the connecting sheet 36 penetrate through the two elastic films 33 respectively and extend to the outside of the spherical shell 31, a first-stage mixing mechanism 38 is fixedly installed at one end of the connecting rod on the right side of the spherical shell 31, and a second-stage mixing mechanism 39 is fixedly installed at one end of the connecting rod on the left side of the spherical shell 31.

The primary mixing mechanism 38 comprises a first sphere 381, a rotating shaft 382, a rotating ring 383, a pure iron ball 384, a squeezing protrusion 385, a mounting hole 386, a flexible membrane 387, an iron ball 388 and a connecting block 389, wherein the first sphere 381 is fixedly connected with a connecting rod positioned on the right side of the spherical shell 31, the upper end and the lower end of the rotating shaft 382 are respectively inserted into the upper side and the lower side of the inner wall of the first sphere 381, a torsional spring is sleeved at the connecting part of the rotating shaft 382 and the first sphere 381, the elasticity of the torsional spring is larger than the sum of the weights of the rotating shaft 382, the rotating ring 383, the pure iron ball 384 and the squeezing protrusion 385, the rotating ring 383 is sleeved on the rotating shaft 382, the pure iron ball 384 is fixedly connected to the right side of the inner ring 383, the squeezing protrusions 385 are fixedly connected in an equidistant surrounding manner to a plurality of mounting holes 386 of the outer ring of the rotating ring 383 and are arranged in the first sphere 381 in an equidistant surrounding manner and penetrate through the outer surface, the plurality of iron beads 388 are fixedly connected to the inner side of the flexible membrane 387 in a group, one side, opposite to the flexible membrane 387, of each iron bead 388 in the same group is fixedly connected with the connecting block 389, and one side, opposite to the iron bead 388, of each connecting block 389 extends into the first sphere 381.

Second grade mechanism 39 of mixing includes second spheroid 391, cross elastic rib 392, hollow iron ball 393, tensile soft muscle 394, impact ball 395 and annular bag 396, second spheroid 391 with be located the left connecting rod fixed connection of spherical shell 381, the four ends of cross elastic rib 392 all with the inner wall fixed connection of second spheroid 391, and hollow iron ball 393 cup joints the middle part at cross elastic rib 392, the quantity of tensile soft muscle 394 is four, and four tensile soft muscle 394 is equidistance surrounding shape fixed connection on the surface of hollow iron ball 393, the equal fixedly connected with impact ball 395 of one end that tensile soft muscle 394 carried on the back hollow iron ball 393, and it has four annular bags 396 that are the equidistance surrounding shape and distribute to bond in the second spheroid 393, four impact balls 395 are located four annular bags 396 respectively.

The attraction mechanism 4 includes a first ring 41, a second ring 42 and magnetic balls 43, the first ring 41 and the second ring 42 are fixedly connected by a fixing rod, four magnetic balls 43 are embedded in the first ring 41 and the second ring 42 and distributed in an equidistant surrounding manner, and the first ring 41 and the second ring 42 are respectively located behind the two traction moving mechanisms 3 on the stirring rod 2.

When the device is used, a secondary mixture is poured into the machine body 1 through the feeding hopper, the rotating rod is driven to rotate through the operation of the driving motor, the stirring rod 2 is driven to rotate synchronously through the rotation of the rotating rod to stir the secondary mixture, an active agent and a water reducing agent are added into the machine body 1 through the feeding hopper in the stirring process, the spherical shell 31 is driven to be close to the magnetic ball 43 through the elastic soft rib 32 in the rotation process of the stirring rod 2, the magnetic column 35 is close to the magnetic ball 43 and is based on magnetic repulsion force between the magnetic column and the magnetic ball 43, the magnetic column 35 pushed by the magnetic repulsion force drives the two connecting pieces 36 to respectively extrude and stretch the elastic balls 37 on two sides, so that the two elastic balls 37 have elastic potential energy, the connecting pieces 36 drive the connecting pieces to move and stretch the elastic membrane 33 when moving, so that the elastic membrane 33 has the elastic potential energy, and the elastic membrane 33 is further stretched to drive, the elastic soft rib 32 has elastic potential energy, the pure iron ball is attracted by magnetic force to drive the swivel 383 to rotate by taking the rotating shaft 382 as an axis when the first ball body 381 continuously moves to approach the magnetic ball 43, the connecting block 389 is pressed into the mounting opening 386 by the pressing bulge 385 in the rotating process, the iron ball 388 is pushed to extrude the flexible membrane 387 outwards, the stress direction is reversed after the magnetic column 35 moves through the magnetic ball 43, the elastic ball 37, the elastic membrane 33 and the elastic soft rib 32 quickly move towards the movement direction of the reversed magnetic column 35 based on the release of the elastic potential energy, so that effective impact is realized on the interior of the secondary mixture in the stirring process, the effect of driving the water reducer mixture into the interior is achieved, meanwhile, the pure iron ball 384 loses magnetic attraction force after being far away from the magnetic ball 43, the rotating shaft 382 is reset based on the driving of the torsion spring and the swivel 383 drives the connecting block 389 to extrude again, and the flexible membrane 387 protrudes outwards to further improve the impact range of the first ball body 381 on the, when the second sphere 391 approaches the magnetic ball 43, the hollow iron ball 393 is subjected to the attraction of the magnetic ball 43 to shift and stretch the cross-shaped elastic rib 392 to have elastic potential energy, meanwhile, the soft rib 394 is stretched to pull the impact ball 395 to move in the shifting process of the hollow iron ball 393 to impact the annular bag 396, so that the second sphere 391 fixedly connected with the annular bag 396 shakes, the mixture is further stirred to promote the mixing effect of the water reducing agent and the mixture, meanwhile, after the hollow iron ball 393 is far away from the second sphere 391, the elastic potential energy of the cross-shaped elastic rib 392 is released based on the disappearance of the magnetic attraction force and drives the second sphere 391 to impact the annular bag 396 again based on inertia to promote the shaking of the second sphere 391, meanwhile, the shaking generated by the second sphere 391 is transmitted to the magnetic column 35 via the connecting rod and transmitted to the first sphere 381 connected with the other connecting rod, so that the first sphere 381 shakes while forming impact on the inside of the mixture, further enlarging its impact effect on the mixture and promoting a uniform distribution of the water-reducing agent in the mixture.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The concrete for improving the strength of the PC member is characterized in that: the cement comprises the following components, by mass, 300-620 parts of cement; 500 portions and 830 portions of sand with the mud content of less than 2 percent; 150-300 parts of crushed stone with the particle size of 5-20 mm; 70-100 parts of mineral powder with the loss on ignition of 1.55%; 70-120 parts of fly ash with the loss on ignition of 4.72%; 40-85 parts of an active agent; 50-90 parts of water reducing agent and 200-450 parts of water.

2. The method for preparing concrete for improving the strength of a PC member according to claim 1, wherein the method comprises the following steps: comprises the following steps of (a) carrying out,

3. The method for preparing concrete for improving the strength of a PC member according to claim 1, wherein the method comprises the following steps: the auxiliary agent mixing device comprises a machine body (1), a stirring rod (2), a traction movable mechanism (3) and an attraction mechanism (4), the top of the machine body (1) is fixedly connected with a feeding hopper communicated with the inner cavity of the machine body, the back of the machine body (1) is fixedly provided with a driving motor, and the output shaft of the driving motor runs through the inner rear wall of the machine body (1) and is fixedly connected with the rear end of the rotating rod, the front end of the rotating rod is inserted into the inner front wall of the machine body (1), a plurality of groups of stirring rods (2) which are distributed along the axial line of the rotating rod at equal intervals are fixedly connected on the rotating rod, four stirring rods (2) are grouped into one group and are fixedly connected on the rotating rod in an equidistant surrounding manner, two traction movable mechanisms (3) are fixedly arranged in each stirring rod (2), a plurality of suction mechanisms (4) are fixedly arranged in the machine body (1) at equal intervals along the axial direction of the rotating rod, and each suction mechanism (4) is positioned between every two groups of adjacent stirring rods (2).

4. The method for preparing concrete for improving the strength of a PC member according to claim 3, wherein the method comprises the following steps: the traction movable mechanism (3) comprises a spherical shell (31) with the left side and the right side being open, elastic soft ribs (32), elastic membranes (33), fixed ring sheets (34), magnetic columns (35), connecting sheets (36), elastic balls (37), a first-stage mixing mechanism (38) and a second-stage mixing mechanism (39), wherein the upper side and the lower side of the spherical shell (31) are fixedly connected with a stirring rod (2) through the elastic soft ribs (32), openings which are used for accommodating the spherical shell (31) and penetrate through the left side and the right side of the spherical shell are formed in the stirring rod (2), one end, far away from the spherical shell (31), of each elastic soft rib (32) is fixedly connected with the inner wall of each opening, the two elastic membranes (33) are in a group and are respectively bonded at the openings on the left side and the right side of the spherical shell (31) and are closed, the fixed ring sheets (34) are fixedly connected to the middle of the inner cavity of the spherical shell (31), the magnetic columns (, and the equal fixedly connected with connection piece (36) in both ends about magnetic column (35), connection piece (36) carry on the back one side fixedly connected with connecting rod of magnetic column (35) mutually, two connecting rods carry on the back one end of connection piece (36) and run through two elastic membranes (33) respectively and extend to spherical shell (31) outside mutually, be located the connecting rod one end fixed mounting on spherical shell (31) right side and stir mechanism (38), be located the left connecting rod one end fixed mounting of spherical shell (31) and stir mechanism (39) of second grade.

5. The method for preparing the concrete for improving the strength of the PC member according to claim 4, wherein the concrete comprises the following components in percentage by weight: first-order mixing mechanism (38) includes first spheroid (381), pivot (382), swivel (383), pure iron ball (384), extrusion protrusion (385), installing port (386), flexible membrane (387), iron ball (388) and connecting block (389), first spheroid (381) and the connecting rod fixed connection that is located spherical shell (31) right side, the upper and lower both ends of pivot (382) are pegged graft respectively in the upper and lower both sides of first spheroid (381) inner wall, and pivot (382) and the junction of first spheroid (381) have cup jointed the torsional spring, the elasticity of torsional spring is greater than pivot (382), swivel (383), the weight sum of pure iron ball (384) and extrusion protrusion (385), swivel (383) suit is on pivot (382), pure iron ball (384) fixed connection is on the inner circle right side of swivel (383), several extrusion protrusion (385) are that several installing port (386) of equidistance surrounding fixed connection in swivel (383) and run through in first spheroid (381) and surround the equidistance and encircle the form The outer surface, one side fixedly connected with of installing port (386) and first spheroid (381) outside intercommunication seals its flexible membrane (387), and several iron pearl (388) are the inboard of a set of fixed connection at flexible membrane (387), and one side that several iron pearl (388) in the same group carried on the back flexible membrane (387) all with connecting block (389) fixed connection, one side that connecting block (389) carried on the back iron pearl (388) extends to in first spheroid (381).

6. The method for preparing concrete for improving the strength of a PC member according to claim 1, wherein the method comprises the following steps: the secondary mixing mechanism (39) comprises a second ball body (391), a cross-shaped elastic rib (392), a hollow iron ball (393), a stretching soft rib (394), a striking ball (395) and an annular bag (396), the second sphere (391) is fixedly connected with a connecting rod positioned at the left side of the spherical shell (381), four ends of the cross-shaped elastic rib (392) are fixedly connected with the inner wall of the second sphere (391), and the hollow iron ball (393) is sleeved in the middle of the cross-shaped elastic rib (392), the number of the stretching soft ribs (394) is four, and the four stretching soft ribs (394) are fixedly connected on the surface of the hollow iron ball (393) in an equidistant surrounding manner, one end of each stretching soft rib (394) opposite to the hollow iron ball (393) is fixedly connected with an impact ball (395), and four annular bags (396) which are distributed in an equidistant surrounding manner are bonded in the second sphere (393), and four impact balls (395) are respectively positioned in the four annular bags (396).

7. The method for preparing concrete for improving the strength of a PC member according to claim 1, wherein the method comprises the following steps: the attraction mechanism (4) comprises a first ring body (41), a second ring body (42) and magnetic balls (43), the first ring body (41) is fixedly connected with the second ring body (42) through a fixing rod, the first ring body (41) and the second ring body (42) are internally embedded with four magnetic balls (43) which are distributed in an equidistant surrounding mode, and the first ring body (41) and the second ring body (42) are respectively positioned behind two traction moving mechanisms (3) on the stirring rod (2).