CN114438885A

CN114438885A - Pouring auxiliary system for cast-in-place bent cap construction and method thereof

Info

Publication number: CN114438885A
Application number: CN202111514313.5A
Authority: CN
Inventors: 贾云飞; 霍艳林; 郭哲; 周丽苹; 李斌; 张贺; 钟晨; 刘傲然; 霍俊超
Original assignee: Beijing Uni Construction Group Co Ltd
Current assignee: Beijing Uni Construction Group Co Ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-05-06
Anticipated expiration: 2041-12-10
Also published as: CN114438885B

Abstract

The invention relates to a pouring auxiliary system for cast-in-place bent cap construction, which at least comprises an outer cylinder protecting part and a first vibration excitation part arranged in the outer cylinder protecting part, and is characterized by also comprising a second vibration excitation part which can enter and exit the outer cylinder protecting part in a reciprocating manner through a guide hole formed in the outer cylinder protecting part, wherein the outer cylinder protecting part can intervene in a pouring object with a first size in the radial direction in a manner of regulating the relative position of the second vibration excitation part on the outer cylinder protecting part and is converted into a second size after intervention, and when the outer cylinder protecting part is intervened in a local space limited by criss-cross reinforcing steel bars in the pouring object, the second vibration excitation part enters an unsteady state under the magnetic influence of the reinforcing steel bars arranged outside the outer cylinder protecting part so as to generate second vibration coupled with the first vibration generated by the first vibration excitation part.

Description

Pouring auxiliary system for cast-in-place bent cap construction and method thereof

Technical Field

The invention relates to the technical field of concrete vibration, in particular to a pouring auxiliary system for cast-in-place bent cap construction and a method thereof.

Background

The bent cap is an important member for bearing the upper part and the lower part in the bridge structure, and the constant load and the live load of the upper structure are transmitted to the pier column and the foundation through the bent cap. The capping beam is used as a connecting member between the bridge box beam and the pier stud, is the main stressed part of the lower part structure of the reinforced concrete simply-supported beam bridge arranged at the top of the pier stud, bears the main supporting function of the bridge, and is the main point of engineering control generally in construction quality. The construction processes of the capping beam bracket have various types, each process has specific functions and process flows, and different results can be formed under different construction processes. The cast-in-place construction is a common construction mode in a capping beam construction process, and the construction quality of the cast-in-place construction is influenced by various factors, such as a concrete mixing ratio method, a pouring process, an adopted bracket and the like. The support is a supporting structure in the construction process of the cast-in-place beam, and the strength, rigidity, stability and deformation of the support directly influence the quality and safety of the structure. The cast-in-place support mostly uses a steel structure support except a foundation, and has the advantages of small elastic deformation and non-elastic deformation, and large rigidity and strength. In the construction process, the quality of the engineering can be ensured only by selecting a solid bracket, the construction load and the dead weight of the concrete can be resisted to the maximum extent, and the construction quality and the safety are ensured.

In the process of pouring concrete to the built steel reinforcement framework and the bottom die, in order to avoid the influence of air bubbles in the concrete on the dense combination of the concrete and the phenomena of eliminating the cellular pitted surface of the concrete, the poured concrete is tamped by means of a special concrete vibrator, so that the concrete is densely combined, the phenomena of eliminating the cellular pitted surface of the concrete and the like are avoided, the combination strength of the concrete is improved, and the quality of a concrete member is ensured. The process of eliminating air bubbles and tamping concrete is also called concrete vibration.

An insertion vibrator is often adopted in a concrete pouring process of the bent cap, and a vibrating head needs to be inserted into concrete during working, so that the vibration waves of the vibrating head are directly transmitted to the concrete. When the concrete vibrator works, the internal friction force and the adhesive force among the particles in the concrete are reduced sharply, and the concrete is in a heavy liquid state. Under the action of the exciting force, aggregate particles slide to approach each other and are rearranged, gaps among the aggregates are filled with cementing materials such as mortar, and air in the mixture drives a part of cement paste to be extruded out of the upper part and is discharged to the outside, so that the tamping effect is achieved. When the concrete vibrator works, the vibrating rod is required to be prevented from contacting the template and the embedded steel bars so as to prevent the template from running or the embedded steel bars from deforming; the action ranges of the vibrating rods must be crossed and overlapped to ensure that all areas are vibrated fully; the vibrating rod needs to be pulled up and down to ensure uniform vibration; the vibrating rod needs to be quickly inserted and slowly pulled, the quick insertion is to prevent the phenomenon that the surface concrete is compacted and is layered and separated with the lower concrete, and the slow pulling is to fill the cavity caused by the pulling of the vibrating rod.

In the prior art, as disclosed in patent document CN104594639B, an air-entraining type concrete vibrator is proposed, which includes: vibrating the outer wall of the rod; the inner wall of the vibrating rod is positioned at the inner side of the outer wall of the vibrating rod; the exhaust cavity is clamped between the outer wall of the vibrating rod and the inner wall of the vibrating rod; the first vent hole is arranged on the outer wall of the vibrating rod and communicated with the exhaust cavity; and the filtering device is arranged at the first vent hole. This technical scheme has set up double-deck lateral wall, the excellent outer wall that vibrates promptly and the excellent inner wall that vibrates to set up the exhaust chamber between the excellent outer wall that vibrates and the excellent inner wall that vibrates, its inside air can directly communicate with each other through the excellent outer wall that vibrates and atmosphere when the concrete vibrates, and direct discharge has reduced the air and has passed through the concrete resistance that rises, has improved the air exhaust speed, has reduced the amount of staying of bubble in the concrete, has reduced the concrete bubble, and the concrete is more closely knit, and the outward appearance is better relatively.

However, the air inlet holes adopted in the technical scheme are small-aperture straight holes, the efficiency of enabling air in the surrounding concrete to enter the air inlet holes is low only through the vibration effect of the vibrating rod, and in addition, the concrete flowing out of the slurry discharge holes is small particles obtained after being screened by a steel filter screen, so that the density of the concrete around the slurry discharge holes is lower certainly, and the requirement of engineering quality cannot be met.

In view of the above, in the prior art, patent document No. CN107905539B proposes a concrete vibrating and stirring apparatus, which includes a rod structure composed of a cylindrical outer wall of the vibrating apparatus and a cylindrical inner wall of the vibrating apparatus, wherein the inner wall of the vibrating apparatus is disposed inside the outer wall of the vibrating apparatus, the two are coaxially disposed to form a whole, and an exhaust cavity is formed between the two; the vibrating device comprises a vibrating device, a rotating device, a vibrating device and a vibrating device, wherein the vibrating device is arranged on the top of the inner wall of the vibrating device and the outer wall of the vibrating device; the polyurethane strip is installed between every two vertical inlet ports, and when concrete is stirred, on one hand, large bubbles which cannot enter the inlet ports are separated into small bubbles, and on the other hand, the concrete discharged from the grout outlet holes is mixed with the concrete around. When the concrete is vibrated, vertically inserting the column structure of the device into the stirred cement concrete material, turning on a switch after switching on a power supply, and simultaneously operating the vibration device and the rotating device; the motor of the rotating device drives the rotating shaft to rotate, and the rotating shaft drives all the rods at the lower part to rotate through the connection with the middle section of the vibrating device; the vibration device impels the whole device to vibrate under the action of the polarization rotor, and impels cement concrete particles to enter the air inlet hole while the vibration impels the cement concrete; the outer wall of the vibrating device rotates in a cement concrete material and directly contacts with concrete under the action of the rotating device, cement concrete particles enter the air inlet hole under the action of the vibration of the rod body and the rotation of the rod body, the cement concrete particles flow to the bottom end under the action of gravity after being separated from bubbles through a steel filter screen, and finally the cement concrete particles can randomly flow out of the outside through the grout outlet hole, and the separated bubbles rise in the air exhaust cavity and are directly exhausted into the atmosphere through the air exhaust hole; the density of concrete particles near the grout discharging hole is lower than that of particles at other parts, and the concrete particles are mixed with surrounding concrete under the stirring action of the polyurethane strips, so that the high-quality concrete material with uniform particle size and extremely low bubble content is finally obtained.

The prior vibrating device provided by the technical scheme mostly adopts stirring auxiliary exhaust, and increases the releasing chance of gas in concrete under the stirring of a stirring end. However, the problem is that the mixing ends of the prior vibrating devices are far from the air inlet ends, the air inlet ends can only contact the gas in the concrete near the mixing ends, and the gas is difficult to move to the air inlet ends in the transverse direction and is discharged to the outside.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the applicant has studied a great deal of literature and patents when making the present invention, but the disclosure is not limited thereto and the details and contents thereof are not listed in detail, it is by no means the present invention has these prior art features, but the present invention has all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

The casting auxiliary system for the cast-in-place bent cap construction is characterized by further comprising a second excitation part which can enter and exit the outer barrel protection part in a reciprocating mode through a guide hole formed in the outer barrel protection part, the outer barrel protection part can intervene in a casting object in a first size in the radial direction in a mode of regulating and controlling the relative position of the second excitation part on the outer barrel protection part and can be converted to a second size after intervention, and when the outer barrel protection part is intervened in a local space limited by criss-cross reinforcing steel bars in the casting object, the second excitation part enters an unsteady state under the influence of the magnetism of the reinforcing steel bars arranged outside the outer barrel protection part to generate second vibration coupled with the first vibration generated by the first excitation part.

The intervention referred to in this application may refer to insertion or placement. The first dimension and the second dimension refer to width parameters of the outer cylinder protecting portion in a radial direction thereof. For the bent cap construction, a plurality of reinforcing bars are criss-cross to form a plurality of cuboid-shaped three-dimensional spaces, when the vibrating device is placed downwards, the vibrating device vertically penetrates through a plurality of vertically parallel three-dimensional spaces, and the vertically parallel three-dimensional spaces are called local spaces limited by the criss-cross reinforcing bars in the application.

According to a preferred embodiment, the outer cylinder protection part has a cavity and an inner cylinder driving part which is sleeved in the cavity of the outer cylinder protection part in a manner that the length extension direction of the inner cylinder driving part is consistent with that of the outer cylinder protection part, a fitting gap is reserved between the inner cylinder driving part and the outer cylinder protection part, and the projection area of the second excitation part on the projection plane which is perpendicular to the length extension direction of the outer cylinder protection part is related to the projection areas of the outer cylinder protection part and the inner cylinder driving part on the projection plane.

According to a preferred embodiment, the second excitation portion has a cavity, and at least an excitation assembly for generating a vibration effect is arranged in the cavity, the excitation assembly at least comprises a coating layer, a compressible elastic member and a movable magnetic member, the compressible elastic member and the movable magnetic member are arranged in the coating layer, one end of the compressible elastic member is connected to the fixed magnetic member, the movable magnetic member is forced to deform under the condition that the movable magnetic member is influenced by magnetism and moves in the coating layer, and the movable magnetic member can move reversely under the elastic potential energy released by the compressible elastic member when the magnetic influence changes.

According to a preferred embodiment, the excitation assembly further comprises a fixed magnetic member relatively fixed in the cladding, the compressible elastic member is formed between the fixed magnetic member and the movable magnetic member to isolate the fixed magnetic member from the movable magnetic member, and a relative distance between the fixed magnetic member and the movable magnetic member can be changed by a combined action of a magnetic influence formed by the fixed magnetic member and a magnetic influence formed by a reinforcing steel bar surrounding the outer cylinder protection part.

The unsteady state of the second excitation portion referred to in the present application mainly means that the magnetic attraction force received by the movable magnetic member is changed or dynamically changed. The first vibration referred to in the present application mainly refers to a vibration action obtained by the first excitation portion by driving the motor. The second vibration mentioned in the present application mainly refers to a vibration action generated when the second excitation portion enters an unsteady state under the magnetic influence of the reinforcing steel bars surrounding the outer cylinder protection portion. The second vibration mentioned in the present application does not refer to the vibration action caused by the magnetic influence of the steel bar surrounding the outer cylindrical protective part singly, but includes the combined action formed by coupling the second vibration with the magnetic influence formed by the fixed magnetic member.

According to a preferred embodiment, the excitation assembly further comprises a phase transformation portion disposed in the cladding, wherein the phase transformation portion at least partially covers the fixed magnetic element, the movable magnetic element and the elastic compressible element, and is configured to form a first configuration for limiting the relative positions of the movable magnetic element and the elastic compressible element in the cladding under the triggering condition, and to form a second configuration for allowing the movable magnetic element and the elastic compressible element to move relative to each other in the cladding when the triggering condition is released.

According to a preferred embodiment, the excitation assembly comprises two elastic compressible members, which are respectively disposed on two opposite sides of the movable magnetic member and respectively have free ends far away from the side of the movable magnetic member.

According to a preferred embodiment, the second excitation portion further includes a gas adsorption means for adsorbing and discharging residual gas in the casting, and the gas adsorption means is communicable to the external environment of the outer cylinder protection portion through a first vent hole provided in a wall surface of the second excitation portion.

According to a preferred embodiment, the gas adsorption assembly has a shaped inner layer and an unshaped outer layer, and an interlayer space formed between the unshaped outer layer and the shaped inner layer can be communicated with an inner layer gas cavity formed by the shaped inner layer covering the first vent hole.

According to a preferred embodiment, the system is adapted to selectively draw or expel gas through the first vent by varying the volume of the interlayer space by manipulating the configuration of the amorphous outer layer relative to the shaped inner layer.

The application also provides a pouring auxiliary method for the construction of the cast-in-place bent cap, which at least comprises the following steps: regulating and controlling the relative position of a vibration excitation part on the outer cylinder protection part to enable the outer cylinder protection part to have a first size in the radial direction; the outer cylinder protecting part under the first size is inserted into a casting and is converted into a second size after being inserted; when the outer cylinder protection part is inserted into a local space defined by criss-cross reinforcing steel bars in a casting, the excitation part enters an unsteady state under the influence of the magnetism of the reinforcing steel bars arranged outside the outer cylinder protection part so as to generate second vibration coupled with first vibration generated by other excitation parts.

Drawings

Fig. 1 is a simplified internal structural diagram of a vibrating device in a pouring auxiliary system for cast-in-place bent cap construction according to the present application;

fig. 2 is a simplified structural schematic diagram of a transmission groove formed in a support member used in the pouring auxiliary system for cast-in-place bent cap construction of the present application.

List of reference numerals

1: a first excitation section; 2: a second excitation section; 3: an outer cylinder protection part; 4: an inner cylinder driving part; 5: a guide hole; 6: fitting clearance; 7: a transmission accessory; 8: a support member; 9: a transmission groove.

Detailed Description

The present application will be described in detail below with reference to the accompanying drawings.

The application provides a pouring auxiliary system for cast-in-place bent cap construction, which at least comprises a vibration device, wherein the vibration device is used for inserting uncured pouring objects and exciting the uncured pouring objects in the concrete pouring process.

Compared with the traditional single cylinder type structure which only arranges the first excitation part 1 in the vibrating device and has limited effective vibrating range, the vibrating device provided by the application is simultaneously provided with the first excitation part 1 and the second excitation part 2 which have mutually exciting effects and can be coupled and acted on the casting, and the second excitation part 2 can extend to the outside of the vibrating device to change the relative position relation between the second excitation part and the first excitation part 1, under the arrangement, on one hand, the traditional single cylinder type structure is changed, because of the change of the relative position relation between the first excitation part 1 and the second excitation part 2, when the vibrating device provided by the application enters the casting, a larger effective vibrating range can be formed, and the vibrating device is different from the wolf tooth rod type structure which is additionally provided with a plurality of extending type stirring strips on the traditional single cylinder type structure in the prior art, the part extending to the outside of the vibrating device comprises the second excitation part 2, the first excitation part 1 and the second excitation part 2 which are positioned at different positions and have different excitation forms are matched to form a certain disordered excitation coupling effect, so that a better excitation effect can be achieved. On the other hand, due to the changeability of the relative position relation between the first vibration excitation part 1 and the second vibration excitation part 2, the vibration device provided by the application can be converted into a structure similar to a straight cylinder before being placed into a casting, so that the vibration device can smoothly enter the casting with smaller placing resistance, and can be quickly inserted and slowly pulled out, and a gap is prevented from being left in the casting due to the inserting and pulling process.

In order to realize the purpose that the relative position relationship between the first excitation part 1 and the second excitation part 2 can be changed, the outer cylinder protecting part 3 of the vibrating device is provided with a cavity, and an inner cylinder driving part 4 is arranged in the cavity. The inner tube driving part 4 is fitted in the outer tube protecting part 3 in such a manner that the extending direction thereof coincides with the outer tube protecting part 3. A fitting gap 6 is reserved between the inner cylinder driving part 4 and the outer cylinder protecting part 3.

Through the metal fitting gap 6, the projection area of the second excitation portion 2 on the projection plane perpendicular to the first direction is related to the projection areas of the outer cylinder protection portion 3 and the inner cylinder driving portion 4 on the projection plane. In other words, the second excitation portion 2 mainly refers to a whole composed of a plurality of components, and the whole has a connection relationship with the outer cylinder protection portion 3 and the inner cylinder driving portion 4, and the connection relationship mentioned herein does not refer to a fixed connection absolutely, but may refer to a through sliding connection or a linkage indirect connection, etc. The first direction refers to a length extending direction of the vibrating device which is similar to a cylindrical structure as a whole, and can also refer to a vertical direction.

In order to realize the relationship between the projection area of the second excitation part 2 on the projection plane perpendicular to the first direction and the projection area of the outer cylinder protection part 3 on the projection plane, at least one guide hole 5 is formed in the wall of the outer cylinder protection part 3. Both ends of the guide hole 5 are communicated to the outside of the outer cylinder protecting part 3 and the fitting gap 6, respectively. The guide hole 5 is used for guiding the moving direction of the second excitation portion 2 extending to the outside of the vibrating device.

The guide hole 5 may be formed in the wall of the outer tube protecting part 3 so that the through hole direction thereof is perpendicular to the first direction. Since the second excitation part 2 penetrates the guide hole 5 and is located in concrete which is a fluid casting during operation, in order to prevent the fluid casting from entering or blocking the guide hole 5, a soft rubber isolation sleeve is further arranged on the shell wall of the outer cylinder protection part 3. One end of the soft rubber isolation sleeve is connected to the outer side of the guide hole 5 in a circumferential direction around the guide hole 5. The other end of the soft rubber isolation sleeve is annularly connected to the outer side of the second excitation part 2. Here, the outer side of the second excitation portion 2 may refer to an end portion of the second excitation portion 2 extending outside the guide hole 5. The soft rubber isolation sleeve can be a folding rubber expansion sleeve, and a plurality of folding parts are arranged in the folding direction of the soft rubber isolation sleeve. When the second excitation portion 2 moves from the guide hole 5 to the outside or the inside of the outer tube protection portion 3, the soft gum spacer can be folded or unfolded along with the movement of the second excitation portion 2. Under this arrangement, the influence of the fluid-shaped casting entering the interior of the vibrating device from the guide hole 5 on the normal operation of the internal components can be effectively avoided in the using process.

In order to reduce the size of the vibrating device when entering and exiting the casting, an annular groove is formed in the outer cylinder protecting part 3 in the circumferential direction of the guide hole 5. One end of the soft rubber isolating sleeve connected to the outer side of the guide hole 5 is connected in the inner wall of the annular groove. The soft rubber isolation sleeve can be at least partially folded into the annular groove, so that the radial size of the vibrating device is reduced.

In order to better fold the soft gum isolation sleeve in the annular groove, the flexible gum isolation sleeve is vertically observed in the radial direction of the first direction on the vibrating device, and the flexible gum isolation sleeve has a bending radian which is close to the outer wall of the outer cylinder protection part 3 in the width direction. Thereby further reducing the radial dimension of the tamper assembly as it enters and exits the casting.

The second excitation portion 2 may have a long structure that conforms to the shape of the guide hole 5. The second excitation portion 2 has a cavity, and at least an excitation member for generating a vibration action is provided in the cavity.

When the outer cylinder protecting part 3 is inserted into a local space defined by criss-cross reinforcing steel bars in a casting, the excitation components in the second excitation part 2 can enter an unsteady state under the magnetic influence of the reinforcing steel bars surrounding the outer cylinder protecting part 3 to generate second vibration coupled with the first vibration generated by the first excitation part 1.

The excitation assembly includes one or more of a cladding layer, a phase change portion, a compressible resilient member, a fixed magnetic member, and a movable magnetic member, as described below.

The fixed magnetic part is arranged in the cladding layer. The position of the fixed magnetic element in the cladding layer is relatively fixed. An effective magnetic attraction effect for driving the fixed magnetic part and the movable magnetic part to approach each other is formed between the fixed magnetic part and the movable magnetic part. When the outer cylinder protecting part 3 is inserted into a local space defined by criss-cross reinforcing steel bars in a casting, the movable magnetic part is subjected to effective magnetic attraction of the external reinforcing steel bars.

Preferably, the coating layer may be an elongated cylindrical structure having a cavity for accommodating one or more of the phase change portion, the compressible elastic member, the fixed magnetic member, and the movable magnetic member. Preferably, the fixed magnetic member and the movable magnetic member may be both spherical members.

The phase change part is arranged in the cladding layer and at least partially wraps the fixed magnetic piece and the movable magnetic piece. The phase change part has two mutually switchable phase change forms, and can be switched from a solid state to a liquid state after being heated and warmed. The phase change portion is in a solid state at a relatively low temperature and in a liquid state at a relatively high temperature. The inner wall of the coating layer can be provided with a heating part with adjustable temperature for realizing the temperature regulation and control of the phase change part.

Before the outer cylinder protecting part 3 is inserted into a local space defined by criss-cross steel bars in a casting, the phase change part is in a solid state, so that the relative position relation between the fixed magnetic part and the movable magnetic part is limited. At this time, the second excitation portion 2 does not generate vibration.

After the outer cylinder protecting part 3 is inserted into a local space defined by criss-cross steel bars in a casting, the temperature in the cladding is raised, so that the phase change part is converted from a solid state to a liquid state, and the limiting effect of the phase change part on the relative position relation between the fixed magnetic element and the movable magnetic element is relieved. At this time, the second excitation portion 2 can generate vibration.

As a preferred embodiment, the coating can be designed as a material that is not easily deformable. The movable magnetic piece is arranged in the coating layer and can move in the coating layer under the trigger condition or be relatively fixed at different positions in the coating layer after the trigger condition is released. The triggering condition mentioned here refers to a change in temperature, or to an operation of withdrawing from or interposing into the casting, or to a corresponding change in the phase change portion due to a change in temperature. Specifically, due to the transformation of the phase change state of the phase change portion, the phase change portion in the solid state will form a resistance effect on the movable magnetic member to limit it to different positions in the cladding layer. The phase change part in the liquid state releases the resistance effect on the fixed magnetic part, and the movable magnetic part can move relatively in the coating layer along with the magnetic effect on the movable magnetic part.

In this arrangement, the phase change portion in the solid state will act as a resistance to the fixed magnetic element and confine it to different locations within the cladding layer due to the transition of the phase change state of the phase change portion. Preferably, the phase change part in the liquid state releases the resistance effect on the fixed magnetic element, and the fixed magnetic element can move relatively in the cladding layer along with the magnetic effect on the fixed magnetic element.

As a further preferred embodiment, the coating can be designed as a material which is easily deformable. The movable magnetic part is arranged in the coating layer and can move relative to the fixed magnetic part in a mode of deforming the coating layer under a trigger condition. The movable magnetic part is fixedly connected with one end of the coating layer or the inner wall of the coating layer, so that the coating layer is correspondingly deformed when the movable magnetic part moves left and right under the influence of external force. Preferably, in this arrangement, the excitation assembly may include one or more of a cladding, a phase change portion, a fixed magnetic element, and a movable magnetic element, wherein at least a portion of the cladding is an elastic material. Here, at least partially covering means especially a covering except for a part of a covering the fixed magnetic member, or especially a covering located between the fixed magnetic member and the movable magnetic member.

The compressible elastic member is arranged in the cladding layer. One end of the compressible elastic part is a free end, and the other end of the compressible elastic part is relatively fixed on the fixed magnetic part. The compressible elastic element is positioned in the phase change part between the fixed magnetic element and the movable magnetic element to isolate the fixed magnetic element from the movable magnetic element. When the movable magnetic part is subjected to the magnetic action of the fixed magnetic part or other external forces to move towards the fixed magnetic part, the elastic potential energy of the compressible elastic part is increased along with the increase of the deviation degree between the distance between the fixed magnetic part and the movable magnetic part and the preset distance threshold value; as the deviation degree between the distance between the fixed magnetic part and the movable magnetic part and the preset distance threshold value is reduced, the elastic potential energy of the compressible elastic part is reduced, so that the movable magnetic part generates high-frequency vibration.

Preferably, the second excitation portion 2 includes an inner and outer sleeve type structure, the outer sleeve has a first end portion of the second excitation portion 2 which is always located inside the outer cylinder protection portion 3, and the inner sleeve has a second end portion of the second excitation portion 2 which is movable to the outside of the outer cylinder protection portion 3 through the guide hole 5. As a preferred embodiment, the outer wall of the cladding layer of the excitation assembly corresponding to the position where the movable magnetic member is disposed may be fixedly connected to the inner wall of the second end portion of the inner sleeve. So that the high-frequency vibration generated by the movable magnetic member can be better transmitted to the casting located outside the second excitation portion 2. As another preferred embodiment, an outer wall of the cladding layer of the excitation assembly corresponding to a position where the fixed magnetic member is disposed may be fixedly connected to an inner wall of the other end portion of the inner sleeve opposite to the second end portion thereof. So that the high-frequency vibration generated by the movable magnetic member can be better transmitted to the casting located outside the second excitation portion 2.

The excitation assembly is provided in the second excitation portion 2 such that the movable magnetic member is closer to the second end or the free end of the second excitation portion 2 than the fixed magnetic member. In this arrangement, the high-frequency vibration generated by the moving magnet occurs at the distal end of the second excitation portion 2 like a cantilever, whereby the degree of vibration or the vibration radiation range can be enhanced.

Preferably, the outer wall of the soft rubber isolation sleeve can be provided with a plurality of extension rods. Because the soft gum spacer sleeve is connected with the second vibration excitation part 2, the high-frequency vibration generated by the second vibration excitation part 2 is synchronously transmitted to the soft gum spacer sleeve, so that the extension rod extending to the interior of the casting on the outer wall of the extension rod vibrates the casting to further enhance the vibration effect.

The plurality of extension rods can be arranged around the circumference of the soft rubber isolation sleeve at intervals. The ring shape formed by the extension rods can be one or a plurality of extension rods arranged along the length direction of the second excitation part 2. For example, a plurality of layers of extension rods are arranged around the circumference of the soft rubber isolation sleeve at intervals, and each layer comprises a plurality of extension rods. The plurality of extension rods can also be arranged on the outer wall of the soft rubber isolation sleeve in a staggered manner. The staggered arrangement referred to herein may refer to ordered staggering or unordered staggering.

As a preferred embodiment, the excitation assembly may include two elastic compressible members, which are respectively disposed on two opposite sides of the movable magnetic member and respectively have free ends far away from the side of the movable magnetic member. The elastic potential energy in two directions can further enhance the high-frequency vibration generated by the movable magnetic part.

Preferably, the phase change portion may be made of a phase change material. Preferably, the phase change part may be prepared by mixing a phase change material and nanoscale iron powder dedicated to magnetic shielding. The phase change material is used for realizing the conversion of the phase change part form, and when the phase change part form is solid, the special iron powder for magnetic shielding plays a role in shielding a magnetic field between the movable magnetic piece and the fixed magnetic piece. When the phase transition portion is in a liquid state, the iron powder dedicated for magnetic shielding is dispersed, and the magnetic field shielding effect on the movable magnetic material and the fixed magnetic material is removed.

Preferably, the clad layer may be made of an elastic heat conductive material capable of transferring external heat to the phase change part. Preferably, the coating layer may be made of an elastic heat insulating material, and the temperature change of the phase change part is not affected by external heat.

Because criss-cross reinforcing steel bars are formed inside the casting, after the vibrating device is operated to be inserted into the casting, the vibrating device is surrounded between the reinforcing steel bars, and the movable magnetic part is influenced by the reinforcing steel bars surrounding the outer side of the vibrating device as well as the suction force of the fixed magnetic part, so that the high-frequency vibration effect generated by the second vibration excitation part 2 is enhanced. In addition, in order to enhance the vibrating effect of the vibrating device, the vibrating device generally needs to be lifted back and forth, so that the distribution of the reinforcing steel bars around the outer part of the vibrating device is relatively changed, that is, the movable magnetic part is influenced by the external influence is changed but not fixed, and therefore, the unsteadiness of the movable magnetic part can be further enhanced by means of the change of the distribution of the external reinforcing steel bars caused by lifting and lowering the vibrating device in the casting, and the high-frequency vibration effect generated by the second excitation part 2 is further enhanced.

At least a gas adsorption means for adsorbing and discharging residual gas in the casting is provided in the cavity of the second excitation section 2. The gas adsorption module is communicated to the external environment of the vibrating device through a first vent hole formed in the wall surface of the second vibration excitation portion 2. The gas adsorption component has a shaped inner layer and an amorphous outer layer.

The interlayer space formed between the amorphous outer layer and the shaping inner layer can be communicated with an inner layer air cavity formed by the shaping inner layer coated on the first vent hole.

The gas adsorption module is formed with a selective passage membrane that allows gas to pass through but does not allow liquids or solids to pass through on the first vent hole.

The volume of the interlayer space can be changed by regulating the form of the amorphous outer layer relative to the form of the amorphous inner layer, so that gas can be selectively sucked or discharged through the first vent hole.

The shaping inner layer can be prepared from a material with a non-convertible shape or a material with a restorable deformation.

Specifically, after the vibrating device is placed in the casting, the casting is coated on the outer wall of the first vent hole, so that the first vent hole is temporarily isolated from the external environment. At this time, the shape of the amorphous outer layer can be regulated and controlled, so that the volume of the interlayer space is increased. Because the interlayer space is communicated with the outside only through the first vent hole, and the first vent hole is relatively closed by the coating of the pouring object which cannot pass through the first vent hole, the volume of the interlayer space is increased, and the interlayer space and the limited gas in the shaping inner layer form a negative pressure state. The negative pressure condition may be used to force gas located outside the first vent hole inward into the interior of the gas adsorption assembly.

Under the condition that partial gas in the pouring object is forced to enter the gas adsorption component, the continuous negative pressure state in the gas adsorption component can be kept by continuously regulating and controlling the form of the amorphous outer layer. Therefore, the gas adsorption component can continuously and effectively adsorb the gas in the casting.

In the prior art, as proposed in the patent document with publication number CN107905539B, a concrete vibrating and stirring device is disclosed, which discloses the internal gas exhausting method of the concrete adopted by most of the prior vibrating devices, that is, a through hole is opened on the outer wall of the vibrating device with a single cylinder structure, and the vibrated gas can be exhausted through the through hole by means of the vibration generated by the vibrating device or the lifting and lowering processes, although a passage for the gas is provided, the problem is that even if the gas is located at the position adjacent to the through hole, the gas itself will not actively move towards the inside of the through hole, so the vibrating device under the technical scheme actually only has the single function of vibration, and the auxiliary function for exhausting the gas is very small. To this, although also there is the relevant research to propose at the inside technical scheme who forms piston structure of vibrating device, piston structure can make the inside negative pressure environment that forms of through-hole, provide the effect of adsorbed gas, however piston structure weight is great, the whole weight of vibrating device has been increased, be unfavorable for vibrating device's the effect of vibrating, and vibrating device's inside cavity is great, if form negative pressure environment inside vibrating device through piston structure, then need the longer distance's of piston structure removal, require vibrating device to need to set up bigger size in length direction.

Compared with the prior art, the vibrating device provided by the application directly sets the negative pressure environment on the second excitation part 2 extending to the interior of the casting, can form the negative pressure environment on a plurality of different positions in a mode of setting a plurality of second excitation parts 2, on one hand, the realization of the negative pressure environment is easier, and the temperature of the casting is directly utilized to promote the formation of the negative pressure environment and actively adsorb gas. In addition, the distributed negative pressure environments are independent of each other, and even if a single second excitation portion 2 fails to form a negative pressure environment, the normal operation of other second excitation portions 2 is not affected. The negative pressure environment is relatively small and is more easily formed. On the other hand, most of the gas required to be exhausted from the casting is directly lifted to the external environment from the interior of the casting under the vibrating action, so that the gas required to be adsorbed and exhausted by the vibrating device through the through holes is less and dispersed, the negative pressure environment formed by the vibrating device is closer to the interior of the casting, the gas adsorption range is radially extended, and the vibrating device is more suitable for adsorbing and exhausting the less and dispersed gas.

Preferably, after the vibrating device is placed in the casting, the first vent hole which is separated from the coating of the casting can be directly communicated with the external environment/air outside the casting, so that the negative pressure state in the gas adsorption component is relieved. At the moment, the shape of the amorphous outer layer can be regulated and controlled, so that the volume of the interlayer space is reduced, gas in the interlayer space is forced to be output from the first vent hole, and the amorphous outer layer is restored to the original shape. With this arrangement, the gas absorbed into the gas absorption assembly can be exhausted to the external environment after a single vibration is completed, and the gas can be prevented from being exhausted into the casting again. For the technical scheme of arranging the piston type structure in the vibrating device, related researches propose that an additional oxygen consumption part is arranged on the vibrating device, the gas sucked into the vibrating device is consumed by chemical reaction, or additional heat can be generated, but the arrangement has the problems that a large amount of gas exists in the vibrating device, the gas can react with the oxygen consumption part, the oxygen consumption capacity of the oxygen consumption part is limited, the oxygen consumption part is arranged in the vibrating device and cannot be frequently replaced, the service cycle of the oxygen consumption part is short, the part is required to be frequently replaced, and the vibrating step is more troublesome. Compared with the prior art, the vibrating device provided by the application does not need to maintain a negative pressure environment through gas consumption, so that the vibrating device can be repeatedly adsorbed and then discharged, can be repeatedly used, and has a longer service cycle.

Preferably, the gas adsorption module may be provided at a position corresponding to the second end of the second excitation portion 2. The gas adsorption component is arranged in the soft rubber isolation sleeve. The gas adsorption assembly may extend into the interior of the casting.

Preferably, the soft rubber isolation sleeve is of a double-layer structure. The soft rubber isolation sleeve is provided with an inner isolation sleeve and an outer isolation sleeve, and an interlayer space is reserved between the inner isolation sleeve and the outer isolation sleeve. The interlayer space referred to in this application is understood to be the space between the inner and outer insulating sleeves.

The inner layer isolation sleeve and the outer layer isolation sleeve can be arranged on the second excitation part 2 respectively according to the following modes: one end of the soft rubber isolating sleeve is connected to the outer side of the guide hole 5 in an annular mode around the circumferential direction of the guide hole 5; the other end of the soft rubber isolation sleeve is annularly connected to the outer side of the second excitation part 2. The inner and outer isolation sleeves are foldable rubber telescopic sleeves, and a plurality of folding parts are arranged in the folding direction of the inner and outer isolation sleeves. When the second excitation portion 2 moves from the guide hole 5 to the outside or inside of the outer tube protecting portion 3, the inner and outer insulating sleeves can be folded or unfolded together with the movement of the second excitation portion 2.

The outer layer isolation sleeve is provided with the first vent hole. The amorphous outer layer of the gas adsorption component is an expansion bag structure. One end of the amorphous outer layer of the gas adsorption component is connected to the outer wall of the outer cylinder protection part 3, which is provided with the second vent hole. The second vent hole is opened on the outer wall of the outer cylinder protecting part 3 between the inner and outer isolation sleeves. The second vent hole is used for the gas in and out of the inner part of the expansion capsule structure/amorphous outer layer.

The change of the shape of the expansion capsule structure/the amorphous outer layer refers to the expansion or contraction and the contraction of the expansion capsule structure/the amorphous outer layer. The outer layer of the balloon structure/amorphous material may be made of a shape memory material. Preferably, the expansion bladder structure/amorphous outer layer collapses upon folding at a relatively high temperature such that the expansion bladder structure/amorphous outer layer decreases in volume. Preferably, upon transition to a relatively low temperature state, the expansion bladder structure/amorphous outer layer stretches and expands such that the expansion bladder structure/amorphous outer layer increases in volume.

Preferably, the balloon structure/amorphous outer layer may be provided with a heating portion. The shape of the amorphous outer layer is controlled by the temperature rise or the temperature fall of the heating part. The heating portion may be a heat conducting wire arranged on or in the amorphous outer layer in a meandering manner, or a heat conducting layer arranged on or in the amorphous outer layer at least partially covering it. The amorphous outer layer has at least a first form and a second form that are mutually converted by controlling the temperature of the heating portion.

As a preferred embodiment, for convenience of description, the soft rubber isolation sleeve may be provided as a part of the second excitation portion 2. For example, the soft rubber spacer is the outermost layer structure of the second excitation part 2. The second excitation part 2 is provided with a flexible soft gum isolation sleeve positioned at the outermost layer. Preferably, the strip-shaped excitation assembly is coated in the soft rubber isolation sleeve. Preferably, the flexible glue isolation sleeve is internally wrapped with the strip-shaped inner sleeve and the strip-shaped outer sleeve. Preferably, to avoid redundancy, references herein to terms such as "balloon structure/amorphous outer layer" refer to either the balloon structure or the amorphous outer layer. Preferably, the inner and outer sleeve structures may be considered part of the excitation assembly, and thus the excitation assembly/inner and outer sleeve structures described below are actually referred to as the inner and outer sleeve structures.

The two ends of the soft rubber isolation sleeve are respectively connected to the outer wall of the outer barrel protection part 3 and the end part of the vibration excitation component/inner and outer sleeve structures. When the vibration exciting assembly/the inner sleeve and the outer sleeve are stretched/moved back and forth along the guide hole 5 arranged on the outer sleeve protecting part 3, the soft rubber isolation sleeve is stretched and folded back and forth.

The shaped inner layer of the gas adsorption assembly may be a number of bulge-like shells. The bulge-shaped shell is reversely buckled and relatively fixed on the position of the soft rubber isolation sleeve, which is provided with the through hole. The expansion and folding of the soft rubber isolation sleeve can not be influenced by the arrangement of the bulge-shaped shell. Preferably, the bulge-like housing herein may be made of a material that is deformable but automatically restores its original shape after removal of an external force forcing its deformation. The shaping inner layer is formed in the interlayer space of the soft rubber isolation sleeve.

Preferably, the soft gum isolation sleeve has certain hardness and is not easy to deform. For example, the soft rubber isolation sleeve can be prepared from natural rubber, fluororubber, nitrile rubber and the like. Therefore, when the amorphous outer layer expands to form a negative pressure environment between the amorphous outer layer and the soft rubber isolation sleeve, the soft rubber isolation sleeve cannot deform to damage the negative pressure environment.

Specifically, after the vibrating device is placed in the casting, the casting is coated on the outer wall of the first vent hole, so that the first vent hole is temporarily isolated from the external environment. The expansion bladder structure/amorphous outer layer may then be switched to a higher temperature, by adjusting the temperature of the heating portion, toward a deflated state. So that the volume of the interlayer space increases. Because the interlayer space is communicated with the outside only through the first vent hole, and the first vent hole is relatively closed by the coating of the pouring object which cannot pass through the first vent hole, the volume of the interlayer space is increased, and the interlayer space and the limited gas in the shaping inner layer form a negative pressure state. The negative pressure condition may be used to force gas located outside the first vent hole inward into the interior of the gas adsorption assembly. Conversely, after the vibrator is extracted from the casting, the first vent hole is in communication with the external environment. The expandable bladder structure/amorphous outer layer may be switched to a lower temperature and toward an expanded, expanded state by adjusting the temperature of the heating portion. So that the volume of the interlayer space is reduced. Because the interlayer space is communicated with the outside only through the first vent hole, the reduction of the volume of the interlayer space enables trapped gas in the interlayer space and the shaping inner layer to be discharged from the first vent hole.

The inner cylinder driving portion 4 and the second excitation portion 2 are coupled to each other. The inner cylinder driving part 4 can relatively rotate in the outer cylinder protecting part 3. The inner cylinder driving portion 4 can move the second exciting portion 2 forward and backward relative to the guide hole 5 in conjunction with the second exciting portion 2. The coupling relationship mentioned herein may refer to a linkage connection or a transmission connection with each other through other components.

The system further comprises a transmission fitting 7, which is provided in the fitting gap 6. The transmission fitting 7 comprises at least one distribution gear. A transmission groove 9 is formed in the supporting piece 8 of the excitation assembly, one of two sides of the transmission groove 9, which are opposite to each other, is arranged to be in a rack shape, and the other side of the transmission groove 9 is arranged to be in a plane shape. The distributed gear is connected to the inside of the power transmission groove 9 such that the tooth surface thereof simultaneously engages with one side of the power transmission groove 9, which is rack-shaped, and abuts against the other side, which is flat. The position of the distributed gear in the vibrating device is relatively fixed. Therefore, when the distributed gear rotates under the action of external force, the distributed gear drives the supporting piece and the second excitation part 2 to move back and forth together.

Preferably, the driving groove 9 may be opened on the vertical top surface of the support. Preferably, the driving groove 9 may be opened on the vertical bottom surface of the support 8. To avoid the distributive gear from being out of meshed connection with the driving groove 9, both ends of the driving groove 9 in the extending direction of the rack-shaped side face thereof are closed ends. The transmission fitting 7 also comprises a transmission rod which is fixedly arranged on the distribution gear. The drive rod is fixed to the non-toothed surface of the distribution gear with one end perpendicular to the non-toothed surface. The transmission rod is used for fixing the position of the distribution gear in the vibrating device relatively.

The inner wall of the outer cylinder protection part 3 can be fixedly provided with a mounting surface positioned on one side of the distributed gear in the vertical direction, and the mounting surface extends from the inner wall of the outer cylinder protection part 3 to the center of the outer cylinder protection part 3. Preferably, a mounting surface above the distribution gear may be fixedly provided on an inner wall of the outer cylinder protecting part 3. The mounting face is parallel to the non-toothed surface of the distribution gear. One end of the transmission rod extends away from the distributive gear and is connected to the mounting surface in an inseparable manner in a rotating manner. The transmission rod can rotate relative to the installation surface but is fixed relative to the vertical position.

The inner cylinder driving section 4 includes at least a center cylinder and a center gear. The center cylinder is provided in the outer cylinder protecting part 3 in such a manner that the cylinder extending direction thereof is parallel to the first direction, and the center gear is provided at one end of the center cylinder in such a manner that the non-gear surface thereof is perpendicular to the first direction. Preferably, a central cylinder is provided on each side of a central gear in the first direction to achieve relative fixation thereof in the outer cylinder protecting part 3. The center cylinder located below the center gear may be rotatably attached to the bottom surface of the outer cylinder protecting part 3 in an inseparable manner. The central cylinder located above the central gear may be connected to a drive motor.

The sun gear is provided in the outer cylinder protecting part 3 so as to mesh with the distributed gear. Preferably, a plurality of distributed gears which are arranged at intervals are sequentially arranged around the circumference of the central gear, and a single central gear can synchronously drive the plurality of second excitation parts 2 to extend into the casting to assist in vibrating.

Preferably, the inner cylinder driving part 4 may be provided with a plurality of sun gears arranged in parallel with each other in the first direction, and the outer cylinder driving part may be provided with a plurality of layers of the second exciting parts 2 in the first direction. And a central cylinder is arranged between every two central gears at intervals to realize the connection and fixation between the two central gears.

The first excitation section 1 includes a transmission shaft and a polarization rotor. The transmission shaft runs through the inside of inner tube drive division 4, and its top is connected to driving motor, and its bottom is provided with this polarization rotor in order to realize the main vibration function of vibrating device.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents. The present description contains several inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", each indicating that the respective paragraph discloses a separate concept, the applicant reserves the right to submit divisional applications according to each inventive concept. Throughout this document, the features referred to as "preferably" are only an optional feature and should not be understood as necessarily requiring that such applicant reserves the right to disclaim or delete the associated preferred feature at any time.

Claims

1. A pouring auxiliary system for cast-in-place bent cap construction at least comprises an outer cylinder protecting part (3) and a first vibration excitation part (1) arranged in the outer cylinder protecting part (3), and is characterized by also comprising a second vibration excitation part (2) which can pass in and out of the outer cylinder protecting part (3) in a reciprocating manner through a guide hole (5) formed in the outer cylinder protecting part (3),

the outer cylinder protecting part (3) can be inserted into a casting in a first size in the radial direction by regulating the relative position of the second excitation part (2) on the outer cylinder protecting part (3) and is converted into a second size after insertion, wherein when the outer cylinder protecting part (3) is inserted into a local space limited by criss-cross reinforcing steel bars in the casting, the second excitation part (2) enters an unstable state under the magnetic influence of the reinforcing steel bars arranged around the outer cylinder protecting part (3) to generate second vibration coupled with the first vibration generated by the first excitation part (1).

2. The system according to claim 1, characterized in that the outer cylinder protector (3) has a cavity and an inner cylinder drive (4) which is fitted into the cavity of the outer cylinder protector (3) in such a way that the length extension direction coincides with the outer cylinder protector (3), a fitting gap (6) remains between the inner cylinder drive (4) and the outer cylinder protector (3), and the projection area of the second excitation (2) on a projection plane perpendicular to the length extension direction of the outer cylinder protector (3) is linked to the projection area of the outer cylinder protector (3) and the inner cylinder drive (4) on the projection plane.

3. The system according to claim 2, characterized in that the second excitation portion (2) has a cavity and at least an excitation assembly for generating a vibration effect is provided in the cavity, the excitation assembly comprises at least a cladding and a compressible elastic member and a movable magnetic member provided in the cladding, one end of the compressible elastic member is connected to the fixed magnetic member, the movable magnetic member is forced to deform under the magnetic influence to move in the cladding and can move in a reverse direction under the elastic potential energy released by the compressible elastic member when the magnetic influence changes.

4. The system as claimed in claim 3, wherein the excitation assembly further comprises a fixed magnetic member relatively fixed in the cladding, the compressible elastic member is formed between the fixed magnetic member and the movable magnetic member to isolate the fixed magnetic member from the movable magnetic member, and the relative distance between the fixed magnetic member and the movable magnetic member is variable by a combined action of a magnetic influence of the fixed magnetic member on the fixed magnetic member and a magnetic influence of a reinforcing steel bar surrounding the outer cylinder protection part (3).

5. The system of claim 4, wherein the excitation assembly further comprises a phase transition portion disposed within the cladding, the phase transition portion at least partially surrounding the fixed magnetic element, the movable magnetic element, and the elastic compressible element and configured to define a first configuration that limits the relative position of the movable magnetic element and the elastic compressible element within the cladding when the excitation assembly is in the triggered condition and a second configuration that allows the movable magnetic element and the elastic compressible element to move relative to each other within the cladding when the excitation assembly is released from the triggered condition.

6. The system of claim 5, wherein the excitation assembly comprises two elastic compressible members disposed on opposite sides of the movable magnetic member and having free ends remote from the movable magnetic member.

7. The system according to claim 6, characterized in that the second excitation part (2) further comprises a gas adsorption module for adsorbing and discharging residual gas in the casting, and the gas adsorption module is communicated to the external environment of the outer cylinder protection part (3) through a first vent hole formed on the wall surface of the second excitation part (2).

8. The system of claim 7, wherein the gas adsorbing assembly has a shaped inner layer and an unshaped outer layer, and the interlayer space formed between the unshaped outer layer and the shaped inner layer can be communicated with the inner layer gas cavity formed by the shaped inner layer covering the first vent hole.

9. The system of claim 8, wherein the system is configured to selectively draw or exhaust gas through the first vent by varying the volume of the interlayer space by manipulating the configuration of the amorphous outer layer relative to the shaped inner layer.

10. The casting auxiliary method for the cast-in-place bent cap construction is characterized by at least comprising the following steps of:

regulating and controlling the relative position of an excitation part on the outer cylinder protecting part (3) to ensure that the outer cylinder protecting part (3) has a first size in the radial direction;

the outer cylinder protection part (3) under the first size is inserted into the casting and is converted into the second size after being inserted;

when the outer cylinder protection part (3) is inserted into a local space defined by criss-cross reinforcing steel bars in a casting, the excitation part enters an unsteady state under the influence of the magnetism of the reinforcing steel bars arranged around the outer cylinder protection part (3) to generate second vibration coupled with first vibration generated by other excitation parts.