Precast concrete member surface defoaming device

Abstract

The invention discloses a precast concrete member surface defoaming device, and relates to the technical field of concrete production, the precast concrete member surface defoaming device comprises a tank body, a scraping rod which moves in a spiral track in the tank body, and extrusion rollers which are driven to rotate and are arranged on the scraping rod, a conveying channel with the sectional area decreasing progressively in the conveying direction is formed between the extrusion rollers. The extrusion rollers comprise rotating rollers and tooth-missing rollers rotationally arranged on the rotating rollers, and the rotating rollers and the tooth-missing rollers are staggered so that a continuous cambered surface and a concave-convex tooth surface can be formed on the two sides of each extrusion roller correspondingly. In the surface defoaming device for the precast concrete member, materials are extruded by concave-convex tooth surfaces of the extrusion rollers in the conveying channel and are pushed upwards, small bubbles can be conveyed to the upper layer through the bottom channel at the bottom of the scraping rod, and under continuous spiral movement of the scraping rod, the bubbles suspended in concrete are lifted to the top layer layer by layer, so that the surface of the precast concrete member is defoamed. And after the bubbles reach the liquid level, the bubbles are automatically broken under atmospheric pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete production, and more particularly to an air bubble eliminating device for the surface of precast concrete components. Background Art

[0002] During the pouring and vibration processes of precast concrete components, internal air is likely to form surface bubbles, which affect aesthetics, waterproofness, and durability. Through the organic combination of mechanical vibration, vacuum adsorption, and intelligent control, the problem of surface bubbles in precast concrete can be efficiently solved.

[0003] Combined with the publication number CN119427501A, the publication date is February 14, 2025, which discloses a processing device for precast concrete components in construction engineering, including a pouring mold for pouring precast concrete components and a conveying mechanism for conveying the pouring mold. Above the conveying mechanism, there is a feeding structure for pouring concrete, and a moving air bubble eliminating mechanism is arranged above the conveying mechanism; relying on the conveying rollers to drive the pouring mold to move. After the pouring mold moves below the feeding pipe, the concrete is conveyed into the mold of the pouring mold by the feeding pipe, thereby improving the pouring efficiency of the concrete; when the concrete pouring is completed, the pouring mold is driven to move below the arc-shaped plate, and the vibrating rod is inserted into the pouring mold to vibrate and eliminate air bubbles in the concrete, thereby improving the convenience of air bubble elimination in the concrete.

[0004] In the prior art including the above patent, the concrete is defoamed by the vertical reciprocating motion of the end of the vibrating rod. However, when the vibrating rod moves upward away from the concrete liquid surface, the vibrating rod will pull the concrete upward, and the concrete will continue to adhere to the vibrating rod under the action of surface tension and become thinner. When the vibrating rod moves downward again, the thinner concrete will entrain some air and penetrate into the concrete together, resulting in the appearance of air bubbles at the bottom layer of the concrete material, and each downward vibration operation of the vibrating rod will always press the air bubbles at the bottom layer of the concrete. Summary of the Invention

[0005] The purpose of the present invention is to provide an air bubble eliminating device for the surface of precast concrete components to solve the above problems.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An air bubble eliminating device for the surface of precast concrete components, including a tank body and a scraping rod moving in a spiral trajectory inside it, including a pressing roller rotatably arranged on the scraping rod driven by a drive, and the pressing rollers are arranged in a group of two and meshed with each other, and the conveying channel between the pressing rollers has a cross-sectional area decreasing along the conveying direction;

[0007] The pressing roller includes a plurality of rotating rollers and a toothless roller rotatably arranged on the rotating rollers, and the rotating rollers and the toothless rollers are staggered so that continuous arc surfaces and concave-convex tooth surfaces are respectively formed on both sides of the pressing roller;

[0008] A scraping wall plate arranged at the end of a scraping rod, which has a scraping station pressing against the inner wall of the tank;

[0009] A rotating roller rotatably arranged on the scraping rod;

[0010] It further includes a liquid inlet pipe for transporting defoaming agent.

[0011] Preferably, an elastic member is arranged on the toothless roller so that the toothless roller and the rotating roller are kept at a predetermined angle.

[0012] Preferably, the scraping wall plate deforms under the blockage of materials;

[0013] It further includes a triggering mechanism for detecting the deformation of the scraping wall plate, which includes a sliding plate slidably arranged at the end of the scraping rod and pushing against the scraping wall plate.

[0014] Preferably, the triggering mechanism further includes a movable plate for locking the sliding plate, and the movable plate is pushed by the deformed scraping wall plate to unlock the sliding plate.

[0015] Preferably, it further includes a roller rotatably arranged on the scraping rod, which drives the rotating roller to rotate when the scraping wall plate is at the scraping station.

[0016] Preferably, it further includes an arc plate fixedly arranged on the sliding plate, and a rolling channel is formed by enclosing between it and the rotating roller.

[0017] Preferably, it further includes a pressing plate fixedly arranged on the scraping wall plate, and the pressing plate has two stations perpendicular to the rotating roller and tangent to the rotating roller.

[0018] Preferably, it further includes a conveying cavity opened on the scraping rod and facing the continuous arc surface side of the extrusion roller.

[0019] Preferably, the inner diameter of the output port of the conveying cavity decreases along the conveying direction, and a side flow channel pointing to the output port is opened on the scraping rod.

[0020] Preferably, an opening and closing plate that cooperates with the extrusion roller for blocking and separating is fixedly arranged on the conveying cavity.

[0021] In the above technical solution, a surface defoaming device for precast concrete components provided by the present invention has the following beneficial effects: The materials are squeezed by the concave and convex tooth surfaces of the extrusion roller in the conveying channel and pushed upward, and the small bubbles are also transported to the upper layer through the bottom channel at the bottom of the scraping rod. Under the continuous spiral movement of the scraping rod, the bubbles suspended in the concrete are lifted layer by layer to the top layer until the bubbles reach the liquid surface and automatically break under the atmospheric pressure. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is the overall three-dimensional schematic diagram provided by the embodiment of the present invention;

[0024] Figure 2 It is the structural schematic diagram of the scraping rod and the scraping wall plate provided by the embodiment of the present invention;

[0025] Figure 3 It is the structural schematic diagram of the scraping rod and the scraping teeth provided by the embodiment of the present invention;

[0026] Figure 4 It is the structural schematic diagram of the scraping wall plate and the rotating roller provided by the embodiment of the present invention;

[0027] Figure 5 It is the exploded structural schematic diagram of the scraping rod and the rotating roller provided by the embodiment of the present invention;

[0028] Figure 6 It is the structural schematic diagram of the movable plate and the roller provided by the embodiment of the present invention;

[0029] Figure 7 It is the structural schematic diagram of the sliding plate and the movable plate provided by the embodiment of the present invention;

[0030] Figure 8 It is the structural schematic diagram of the movable plate provided by the embodiment of the present invention;

[0031] Figure 9 It is the schematic diagram of the state of the scraping wall plate when it is not in the scraping station provided by the embodiment of the present invention;

[0032] Figure 10 It is the schematic diagram of the state of the scraping wall plate when it is in the scraping station provided by the embodiment of the present invention;

[0033] Figure 11 It is the sectional structural schematic diagram of the scraping rod provided by the embodiment of the present invention;

[0034] Figure 12 It is the structural schematic diagram of the extrusion roller provided by the embodiment of the present invention.

[0035] Explanation of reference numerals:

[0036] 1. Tank body; 2. Threaded column; 3. First motor; 4. Scraping rod; 41. Extrusion roller; 411. Rotating roller; 412. Toothless roller; 413. Elastic member; 414. Second motor; 42. Scraping teeth; 43. Rotating roller; 44. Roller; 45. Driven gear; 46. Transmission member; 47. Movable plate; 48. Second spring; 49. Fixed wheel; 410. First spring; 5. Sleeve; 6. Wall scraping plate; 61. Protrusion; 62. Pressing plate; 7. Slide plate; 71. Pressing rod; 72. Arc plate; 73. Driving gear; 74. Transmission belt; 75. Stopper; 8. Liquid inlet pipe; 81. Delivery cavity; 82. Side flow channel; 83. Opening and closing plate. Detailed implementation mode

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0038] As Figures 1-12 shown, a defoaming device for the surface of precast concrete components includes a tank body 1 and a scraping rod 4 moving in a spiral trajectory therein, and includes an extrusion roller 41 rotatably driven and arranged on the scraping rod 4. As Figure 11 shown, and the extrusion rollers 41 are arranged in pairs and meshed with each other, and the cross-sectional area between the extrusion rollers 41 decreases along the conveying direction;

[0039] The extrusion roller 41 includes a plurality of rotating rollers 411 and a toothless roller 412 rotatably arranged on the rotating rollers 411. (Among them, the plurality of rotating rollers 411 are arranged at intervals and fixedly connected, and the toothless roller 412 is rotatably arranged between two adjacent rotating rollers 411), and the rotating rollers 411 and the toothless roller 412 are staggered so that continuous arc surfaces and concave-convex tooth surfaces are respectively formed on both sides of the extrusion roller 41 (as Figure 12 shown);

[0040] A wall scraping plate 6 arranged at the end of the scraping rod 4 (as Figure 3 shown), which has a scraping station pressing against the inner wall of the tank body 1;

[0041] A rotating roller 43 rotatably arranged on the scraping rod 4;

[0042] It also includes a liquid inlet pipe 8 for conveying defoaming agent (as Figure 11 shown).

[0043] Specifically, it also includes a threaded column 2 fixedly arranged at the center of the tank body 1 and a first motor 3 fixedly arranged in the tank body 1. The first end of the scraping rod 4 is fixedly provided with a sleeve 5, and the sleeve 5 is threadedly connected with the threaded column 2 and is slidably matched with the output shaft of the first motor 3. A plurality of vertical columns are fixedly arranged on the output shaft of the first motor 3, and the vertical columns surround the outside of the threaded column 2, and the vertical columns are slidably connected with the sleeve 5.

[0044] By driving the first motor 3, the first motor 3 drives the sleeve 5 to rotate and move along the thread groove of the threaded column 2 (as Figure 2 shown), so that the scraping rod 4 spirally ascends from the bottom of the inner wall of the tank body 1. Through the spiral movement of the scraping rod 4, the concrete material in the tank body 1 can be stirred layer by layer. And a plurality of scraping teeth 42 are arranged on the side of the scraping rod 4 facing the concrete. Through the rotation of the scraping rod 4, the bubbles suspended in the concrete material are crushed by the scraping rod 4, and the concrete is driven to perform centrifugation under the rotation of the scraping rod 4. The bubbles with smaller density (the density is much lower than that of the concrete) are thrown to the outer edge of the circular motion, so as to accelerate the migration of the bubbles to the surface.

[0045] Furthermore, the extrusion roller 41 is composed of a rotating roller 411 and a toothless roller 412 arranged at intervals. It also includes a second motor 414 fixedly arranged on the scraping rod 4. The second motor 414 is used to drive the left rotating roller 411 to rotate counterclockwise (as Figure 12 shown), while the right rotating roller 411 rotates passively clockwise. At this time, the concrete material will be guided to the left side of the extrusion roller 41 along the inclined surface of the scraping teeth 42, and the concrete material will be guided to the conveying channel between the two extrusion rollers 41 as the rotating roller 411 rotates.

[0046] Moreover, the number of teeth of the toothless roller 412 is less than that of the rotating roller 411, and there is a gap of 1 - N° (the value of N is taken as 1 / 10 - 1 / 12 of the pitch angle of the rotating roller 411, and the number of teeth of the rotating roller 411 is 12 - 15) between the pitch angle of the teeth of the rotating roller 411 (that is, the included angle formed by the center lines of two teeth) and the pitch angle of the toothless roller 412. That is, the pitch angle of the rotating roller 411 is a°, and the pitch angle of the toothless roller 412 is b°, b = a ± N. When the two rotating rollers 411 are meshed, the teeth of the toothless roller 412 on the adjacent side will be passively adapted so that the teeth at the meshing part are completely coincident with the rotating roller 411 (the meshing transmission mode of the clearance gear can be referred to). At this time, a concave-convex tooth surface is formed at the meshing part (that is, Figure 11 shown in the middle). On the side far from the meshing part, due to the accumulation of the movement degrees of the teeth of a plurality of toothless rollers 412 (as Figure 11 shown, the teeth at the meshing part are staggered 0° and coincident, then the teeth of the next toothless roller 412 to be meshed and the rotating roller 411 are staggered N°, and the staggered angle of the next one is 2N°, and so on), the teeth on the opposite side of the toothless roller 412 and the teeth of the rotating roller 411 are completely staggered, forming a continuous arc surface (on both sides of the two extrusion rollers 41 as Figure 11 shown), so that the material is guided from the continuous arc surface to the concave-convex tooth surface in the counterclockwise direction, and the overall gear gap of the extrusion roller 41 contacted by the material gradually increases, so as to play a role in gradually "stretching" the material.

[0047] On both sides of the conveying channel are the opposite sides of the two squeezing rollers 41, and the distance between the two opposite sides decreases along the conveying direction ( Figure 11 the dotted line shown in

[0048] ), so that the material is squeezed by the concave-convex tooth surfaces of the squeezing rollers 41 in the conveying channel and pushed upward. At this time, the material is subjected to a shearing force from the concave-convex tooth surfaces, and this shearing force has a crushing effect on the bubbles. Moreover, a bottom channel pointing to the bottom of the conveying channel is provided at the bottom of the scraping rod 4, so that the bottom layer of concrete will be sucked into the conveying channel and conveyed to a higher layer. Even if there are small bubbles that have not been broken at the bottom layer, these small bubbles will be conveyed to the upper layer through the bottom channel at the bottom of the scraping rod 4. Under the continuous spiral movement of the scraping rod 4, the bubbles suspended in the concrete are lifted layer by layer to the top layer until the bubbles reach the liquid surface and automatically break under the atmospheric pressure.

[0049] In the above technology, the material is squeezed by the concave-convex tooth surfaces of the squeezing rollers 41 in the conveying channel and pushed upward. The small bubbles will also be conveyed to the upper layer through the bottom channel at the bottom of the scraping rod 4. Under the continuous spiral movement of the scraping rod 4, the bubbles suspended in the concrete are lifted layer by layer to the top layer until the bubbles reach the liquid surface and automatically break under the atmospheric pressure.

[0050] As an embodiment provided by the present invention, an elastic member 413 is provided on the toothless roller 412 to keep the toothless roller 412 and the rotating roller 411 at a predetermined angle.

[0051] Specifically, the number of teeth of the toothless roller 412 is less than that of the rotating roller 411. During the meshing process, the toothless roller 412 will deflect one degree each time it meshes. When the missing teeth of the toothless roller 412 rotate to the meshing position, due to the lack of corresponding meshing teeth, at this time, the rotating roller 411 meshes completely, and the toothless roller 412 is reset to the initial angle through the elastic member 413 at this time, that is, the toothless roller 412 will rotate relative to the rotating roller 411. When the scraping rod 4 is above the liquid surface, the rotation of the toothless roller 412 is driven by the elastic member 413 to shake off the material on the surface of the toothless roller 412, and at the same time, the material in the tooth gaps of the rotating roller 411 is slightly scraped, playing a self-cleaning role.

[0052] As another embodiment provided by the present invention, the scraping wall plate 6 deforms under the blockage of the material;

[0053] It further includes a triggering mechanism for detecting the deformation of the scraping wall plate 6, which includes a sliding plate 7 slidably arranged at the end of the scraping rod 4 and pushing against the scraping wall plate 6.

[0054] Specifically, the scraper plate 6 is in a "F" shape, and a pressure sensor or a tension sensor can be used to detect the deformation degree of the scraper plate 6. In the initial state, the scraper plate 6 scrapes along the surface of the tank body 1 (such as Figure 9 When agglomerated material appears on the inner wall of the tank body 1, the material will press against the scraper plate 6, causing one side of the scraper plate 6 to bend after being blocked (as shown in the solid line); Figure 9 (As shown by the dotted line in the middle), at this time, the deformation signal of the scraper plate 6 is transmitted to the trigger mechanism, which can drive the slide plate 7 to approach the inner wall of the tank body 1 by setting an electric telescopic rod or a hydraulic rod. The end of the slide plate 7 is fixedly provided with a pressure rod 71 for supporting the scraper plate 6. The slide plate 7 is extended to press the scraper plate 6 against the inner wall of the tank body 1. This is the scraping position of the scraper plate 6. At this time, the angle between the side of the scraper plate 6 and the tank body 1 is smaller (as shown in the dotted line in the middle). Figure 10 As shown), it can better scrape off the agglomerated materials.

[0055] However, the above technology requires the use of highly sensitive detection equipment. However, the detection environment is inside the tank body 1 filled with concrete, which may easily cause the concrete to penetrate into the gaps inside the detection equipment, causing damage to the electronic components.

[0056] As an embodiment of the present invention for solving the above problem, the trigger mechanism further includes a movable plate 47 for locking the slide plate 7 , and the movable plate 47 is pushed by the deformed scraper plate 6 to unlock the slide plate 7 .

[0057] Specifically, the slide plate 7 is further provided with a first spring 410, and the movable plate 47 is provided with a second spring 48 to keep the movable plate 47 at a fixed height. At this height, the side of the movable plate 47 abuts against the stopper 75 fixedly provided on the slide plate 7, and the slide plate 7 is locked by the movable plate 47. The first spring 410 is in a contracted and force-accumulating state (such as Figure 7 As shown). A transmission member 46 is also fixedly provided on the movable plate 47. The transmission member 46 has an inclined surface, and a protrusion 61 is fixedly provided at the position corresponding to the scraper plate 6 and the transmission member 46 (as shown). Figure 7 、 Figure 9 and Figure 10 When agglomerated materials appear on the inner wall of the tank body 1, the materials will press against the scraper plate 6, causing one side of the scraper plate 6 to be blocked and then bent (as shown). Figure 9 As shown by the dotted line in the middle, at this time, the protrusion 61 squeezes the inclined surface of the transmission member 46, and the transmission member 46 drives the movable plate 47 to overcome the elasticity of the second spring 48 and rise, so that the movable plate 47 and the stopper 75 are staggered. After losing the blocking force, the stored force of the first spring 410 is released and drives the slide plate 7 to extend toward the inner wall of the tank body 1. At this time, the stopper 75 slides along the inclined surface at the bottom of the movable plate 47 (as shown in the dotted line in the middle). Figure 6 and Figure 7As shown in the figure, the bottom of the inclined plane abuts against the chamfered part on the stopper 75 to contain the downward movement trend of the movable plate 47. At this time, the elastic force of the second spring 48 is offset by the elastic force of the first spring 410, and the movable plate 47 and the stopper 75 are in balance. The sliding plate 7 presses the scraping plate 6 tightly against the inner wall of the tank body 1. The movable plate 47 is arranged inside the scraping rod 4. The cooperation between the movable plate 47 and the sliding plate 7 can trigger the sliding plate 7, and this triggering process is a mechanical transmission, which does not require other detection equipment, is relatively economical, and is conducive to later maintenance.

[0058] A pressing block extending out of the scraping rod 4 is fixedly arranged on the movable plate 47. After the scraping plate 6 finishes scraping and cleaning the inner wall of the tank body 1 and reaches above the concrete liquid level, at this time, the staff can understand whether there is a caking problem in the tank body 1 by observing the shape of the scraping plate 6. By manually pressing the movable plate 47 by the staff, the inclined plane is driven to squeeze the sliding plate 7 to reset. After the movable plate 47 returns to the fixed height, the inclined plane is below the chamfered part of the stopper 75 (as Figure 7 shown), and the side surface of the movable plate 47 locks the stopper 75. After the sliding plate 7 no longer presses the scraping plate 6, the scraping plate 6 returns to the non-scraping working position.

[0059] Subsequently, the first motor 3 is driven to rotate in the reverse direction, driving the sleeve 5 and the scraping rod 4 to move spirally downward until the scraping rod 4 reaches the bottom of the tank body 1, and then the first motor 3 is driven to rotate forward, so that the scraping plate 6 first scrapes in the reverse direction along the inner wall of the tank body 1 and then in the forward direction, forming multiple reciprocations. After the scraping plate 6 fully cleans the inner wall of the tank body 1, it rises to the liquid level for the staff to observe. Until there is no caking on the inner wall of the tank body 1, when the scraping plate 6 rises to the liquid level, it is still in the non-scraping working position state, playing a role in detecting caking on the inner wall of the tank body 1.

[0060] As another embodiment provided by the present invention, it further includes a roller 44 rotatably arranged on the scraping rod 4, which drives the rotating roller 43 to rotate when the scraping plate 6 is in the scraping working position.

[0061] Specifically, a driving gear 73 is rotatably arranged on the sliding plate 7, and a driven gear 45 is fixedly arranged at the end of the rotating roller 43 (as Figure 5 shown). The sliding plate 7 extends towards the inner wall of the tank body 1 and drives the driving gear 73 to approach the driven gear 45. When the stroke of the sliding plate 7 reaches the limit position, the driving gear 73 and the driven gear 45 are engaged. A transmission belt 74 is arranged between the roller 44 and the driving gear 73, so that when the roller 44 rotates by friction with the inner wall of the tank body 1, the driving gear 73 is synchronously driven to rotate, and the driving gear 73 drives the driven gear 45 and the rotating roller 43 to rotate. At the same time, a fixed wheel 49 is rotatably arranged inside the scraping rod 4, and the transmission belt 74 bypasses the side surface of the fixed wheel 49. When the sliding plate 7 approaches the inner wall 1, the fixed wheel 49 remains in place and tightens the transmission belt 74, so that the transmission belt 74 is always kept taut.

[0062] When the scraping rod 4 rotates clockwise and the scraping plate 6 is not in the scraping position, the rotating roller 43 rotates counterclockwise due to the tangential friction force of the inner wall of the tank body 1. When the scraping plate 6 reaches the scraping position, the rotating roller 43 is driven by the roller 44. At this time, the rotating roller 43 overcomes the friction force of the tank body 1 and rotates clockwise.

[0063] As another embodiment provided by the present invention, it also includes an arc plate 72 fixedly set on the slide plate 7, which forms a rolling channel between the arc plate 72 and the rotating roller 43.

[0064] Specifically, a plurality of circular convex points are provided on the rotating roller 43. When the scraping plate 6 is not in the scraping position, the distance between the arc plate 72 and the rotating roller 43 is large (e.g. Figure 9 As shown), the concrete material passes directly through the arc plate 72 along the side of the scraper plate 6.

[0065] When agglomerated materials appear on the inner wall of the tank body 1, the scraper plate 6 reaches the scraping station, and the slide plate 7 drives the arc plate 72 to extend toward the inner wall of the tank body 1. At this time, the distance between the arc plate 72 and the rotating roller 43 is reduced and enclosed to form a rolling channel (such as Figure 10 As shown in the figure), the rotating roller 43 rotates clockwise to drive the material in the rolling channel to flow to the right spontaneously, thereby playing a suction role on the left entrance of the rolling channel. After the agglomerated material is scooped up by the scraper plate 6, the agglomerated material is sucked into the rolling channel along the upper surface of the scraper plate 6. Since the distance between the arc plate 72 and the rotating roller 43 is small, the circular convex point of the rotating roller 43 will rotate and roll the agglomerated material to crush the agglomerated material.

[0066] As another embodiment provided by the present invention, it also includes a pressing plate 62 fixedly arranged on the scraper plate 6, and the pressing plate 62 has two working positions: perpendicular to the rotating roller 43 and tangent to the rotating roller 43.

[0067] Specifically, the pressing plate 62 is made of elastic plastic material, so the end of the pressing plate 62 can swing. Figure 9 As shown, when the scraper plate 6 is not in the scraping station, the pressure plate 62 is perpendicular to the rotating roller 43. At this time, the pressure plate 62 is overlapped on the rotating roller 43, and the material flows into the arc plate 72 along the upper side of the scraper plate 6. At this time, when the rotating roller 43 rotates counterclockwise, the continuously rotating circular protrusions will drive the two pressure plates 62 to swing until the protrusions are separated from the pressure plates 62. The pressure plates 62 recover under the action of their own deformation potential energy, and the pressure plates 62 swing back and forth. In this process, the materials are rolled by the rotating roller 43 between the scraper plate 6 and the tank body 1. These materials are rolled by the rotating roller 43 and bubbles are removed. The centrifugal force of the concrete stirred by the scraping rod 4 causes the bubbles thrown to the inner wall of the tank body 1 by the centrifugal force to be rolled and removed by the rotating roller 43. The scraper plate 6 in the non-scraping station will clean the small bubbles attached to the inner wall layer by layer along the spiral trajectory.

[0068] When caked materials appear on the inner wall of the tank body 1, the scraping plate 6 reaches the scraping station. At the same time, the pressing plate 62 is pressed by the rotating roller 43, so that the pressing plate 62 is tangent to the rotating roller 43. At this time, the pressing plate 62 does not interfere with the rotation of the rotating roller 43.

[0069] As another embodiment provided by the present invention, it further includes a conveying cavity 81 opened on the scraping rod 4 and facing the continuous arc surface side of the extrusion roller 41 (as Figure 11 shown).

[0070] Specifically, the inner diameter of the output port of the conveying cavity 81 decreases along the conveying direction, and a side flow channel 82 pointing to the output port is opened on the scraping rod 4. The conveying cavity 81 is communicated with the liquid inlet pipe 8. When the defoaming agent is conveyed through the conveying cavity 81, since the inner diameter of the output port of the conveying cavity 81 decreases along the conveying direction, the liquid is bundled when passing through the output port, the flow rate of the liquid increases and the pressure decreases, so that a negative pressure attraction is generated at the output port, so that the concrete is sucked into the output port through the side flow channel 82 to be mixed with the defoaming agent, and then diffuses outward under the pressure of the defoaming agent sprayed outward. And it spirally rises along with the scraping rod 4, so that the defoaming agent is distributed at different heights in the tank body 1, and the defoaming effect is better achieved.

[0071] As another embodiment provided by the present invention, an opening and closing plate 83 that is in blocking and disassembling cooperation with the extrusion roller 41 is fixedly arranged on the conveying cavity 81.

[0072] Specifically, the inside of the liquid inlet pipe 8 is always under positive pressure. The end of the opening and closing plate 83 extends between the teeth of the extrusion roller 41. When the extrusion roller 41 rotates, it drives the opening and closing plate 83 to be intermittently opened, and the defoaming agent is conveyed to the extrusion roller 41 every time it is opened, so as to control the output amount of the defoaming agent. The defoaming agent is mixed with the concrete in a small amount, and then the sufficiently mixed concrete is conveyed to the upper layer, so as to achieve the effect of spreading the defoaming agent, thereby reducing the required amount of the defoaming agent.

[0073] Working principle: By driving the first motor 3, the first motor 3 drives the sleeve 5 to rotate and move along the thread groove of the threaded column 2 (as Figure 2 shown), so that the scraping rod 4 spirally rises from the bottom of the inner wall of the tank body 1. Through the spiral movement of the scraping rod 4, the concrete material in the tank body 1 can be stirred layer by layer.

[0074] Both sides of the conveying channel are the opposite sides of the two extrusion rollers 41, and the distance between the two opposite sides decreases along the conveying direction ( Figure 11 the dotted line shown in), so that the material is squeezed by the concave and convex tooth surfaces of the extrusion rollers 41 and pushed upward in the conveying channel. At this time, the material is subjected to a shearing force from the concave and convex tooth surfaces, and this shearing force has a crushing effect on the bubbles. And a bottom channel pointing to the conveying channel is opened at the bottom of the scraping rod 4, so that the bottom layer of concrete will be sucked into the conveying channel and conveyed to a higher layer.

[0075] When the scraper plate 6 is not in the scraping station, the rotating roller 43 rotates counterclockwise due to the tangential friction force of the inner wall of the tank body 1. The continuously rotating circular convex point will drive the two pressure plates 62 to swing until the convex point is separated from the pressure plate 62. The pressure plate 62 recovers under the action of its own deformation potential energy, and the pressure plate 62 swings back and forth. In this process, the material is rolled into the space between the scraper plate 6 and the tank body 1 by the rotating roller 43. These materials are rolled by the rotating roller 43 and bubbles are removed. In combination with the centrifugal force of the scraper rod 4 stirring the concrete, the bubbles thrown to the inner wall of the tank body 1 by the centrifugal force are rolled and removed by the rotating roller 43.

[0076] When agglomerated materials appear on the inner wall of the tank body 1, the materials will press against the scraper plate 6, causing one side of the scraper plate 6 to be blocked and then bent (such as Figure 9 As shown by the dotted line in the middle, at this time, the protrusion 61 squeezes the inclined surface of the transmission member 46, and the transmission member 46 drives the movable plate 47 to overcome the elasticity of the second spring 48 and rise, so that the movable plate 47 and the stopper 75 are staggered. After losing the blocking force, the stored force of the first spring 410 is released and drives the slide plate 7 to extend toward the inner wall of the tank body 1. At this time, the stopper 75 slides along the inclined surface at the bottom of the movable plate 47 (as shown in the dotted line in the middle). Figure 6 and Figure 7 As shown), the bottom of the inclined surface abuts against the cut corner of the stopper 75 to prevent the downward movement of the movable plate 47. At this time, the elastic force of the second spring 48 is offset by the elastic force of the first spring 410, and the movable plate 47 and the stopper 75 are balanced. The slide plate 7 presses the scraper plate 6 against the inner wall of the tank body 1, which is the scraping position of the scraper plate 6. At this time, the angle between the side of the scraper plate 6 and the tank body 1 is smaller (as shown). Figure 10 As shown), it can better scrape off the agglomerated materials.

[0077] The rotating roller 43 rotates clockwise to drive the material in the rolling channel to flow spontaneously to the right, thereby acting as a suction on the left inlet of the rolling channel. After the agglomerated material is scooped up by the scraper plate 6, the agglomerated material is sucked into the rolling channel along the upper surface of the scraper plate 6. Since the distance between the arc plate 72 and the rotating roller 43 is small, the circular convex point of the rotating roller 43 will rotate and crush the agglomerated material to crush the agglomerated material.

[0078] After the scraper 6 has finished scraping and cleaning the inner wall of the tank body 1, it reaches above the concrete liquid level. The staff manually presses the movable plate 47 to drive the inclined surface extrusion slide 7 to reset. After the movable plate 47 returns to a fixed height, the inclined surface is located below the cut corner of the stopper 75 (such as Figure 7 As shown), through the side locking stopper 75 of the movable plate 47, the slide plate 7 no longer presses the scraper plate 6, so that the scraper plate 6 returns to the non-scraping position.

[0079] Only some exemplary embodiments of the present invention have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A surface defoaming device for precast concrete components, comprising a tank body (1) and a scraping rod (4) that moves in a spiral trajectory inside it, characterized in that, It includes extrusion rollers (41) which are driven to rotate and arranged on a scraping rod (4), and the extrusion rollers (41) are arranged in groups of two and meshed with each other. A conveying channel with a gradually decreasing cross-sectional area in the conveying direction is formed between the extrusion rollers (41). The extrusion roller (41) includes a plurality of rotating rollers (411) and tooth-deficient rollers (412) rotatably arranged on the rotating rollers (411). The rotating rollers (411) and the tooth-deficient rollers (412) are staggered so that continuous arc surfaces and concave-convex tooth surfaces are respectively formed on both sides of the extrusion roller (41). A scraping wall plate (6) arranged at the end of the scraping rod (4), which has a scraping station pressing against the inner wall of the tank body (1). A rotating roller (43) rotatably arranged on the scraping rod (4). It also includes a liquid inlet pipe (8) for conveying defoamer.

2. The surface defoaming device for precast concrete components according to claim 1, characterized in that, An elastic member (413) is arranged on the tooth-deficient roller (412) so that the tooth-deficient roller (412) and the rotating roller (411) are kept at a predetermined angle.

3. A surface defoaming device for precast concrete components according to claim 1, characterized in that, The scraping wall plate (6) deforms under the blockage of materials. It also includes a triggering mechanism for detecting the deformation of the scraping wall plate (6), which includes a sliding plate (7) slidably arranged at the end of the scraping rod (4) and pushing against the scraping wall plate (6).

4. A surface defoaming device for precast concrete components according to claim 3, characterized in that, The triggering mechanism also includes a movable plate (47) for locking the sliding plate (7), and the movable plate (47) is pushed by the deformed scraping wall plate (6) to unlock the sliding plate (7).

5. A surface defoaming device for precast concrete components according to claim 1, characterized in that, It also includes a roller (44) rotatably arranged on the scraping rod (4), which drives the rotating roller (43) to rotate when the scraping wall plate (6) is at the scraping station.

6. The surface defoaming device for precast concrete components according to claim 3, characterized in that, It also includes an arc plate (72) fixedly arranged on the sliding plate (7), and a rolling channel is formed by enclosing between it and the rotating roller (43).

7. The surface defoaming device for precast concrete components according to claim 1, characterized in that, It also includes a pressing plate (62) fixedly arranged on the scraping wall plate (6), and the pressing plate (62) has two stations perpendicular to the rotating roller (43) and tangent to the rotating roller (43).

8. A surface defoaming device for precast concrete components according to claim 1, characterized in that, It also includes a conveying cavity (81) opened on the scraping rod (4) and facing the continuous arc surface side of the extrusion roller (41).

9. The surface defoaming device for precast concrete components according to claim 8, characterized in that, The inner diameter of the output port of the conveying cavity (81) decreases along the conveying direction, and a side flow channel (82) pointing to the output port is opened on the scraping rod (4).

10. A surface defoaming device for precast concrete components according to claim 9, characterized in that, An opening and closing plate (83) which is fixedly arranged on the conveying cavity (81) and is in blocking and disassembling cooperation with the extrusion roller (41) is provided.

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