Autoclaved aerated concrete block casting and forming device and method

Abstract

The present invention relates to the technical field of concrete piece forming, specifically to an autoclaved aerated concrete block casting and forming device and method, including a lifting frame equipped with a casting head and a defoaming mechanism; the defoaming mechanism includes a mounting seat that is symmetrically arranged and synchronously moves in opposite directions, and a plurality of vibrating heads and a plurality of stirring heads are installed on the mounting seat. The present invention performs casting while defoaming, thereby improving the efficiency and quality of casting, and in the process of defoaming, the vibrating head and the stirring head cooperate with each other to fully and efficiently remove the bubbles in the slurry, and utilize two stirring and homogenizing units to automatically move the middle slurry to both sides during the stirring and defoaming process, and homogenize the slurry in the mold, effectively avoiding the influence of uneven distribution of the slurry on the defoaming effect and efficiency, thereby fully and efficiently removing the bubbles in the slurry, and further improving the efficiency and quality of casting.

Description

Technical Field

[0001] The invention relates to the technical field of concrete piece forming, in particular to a device and method for casting and forming autoclaved aerated concrete blocks. Background Art

[0002] Autoclaved aerated concrete blocks are a lightweight, porous building material with excellent thermal insulation, heat insulation and sound insulation properties. The production steps of autoclaved aerated concrete blocks include slurry preparation, slurry foaming, mold pouring, preliminary solidification, green body cutting, autoclaving and curing. Among them, mold pouring is the most important step in the production of autoclaved aerated concrete blocks. However, when the slurry foams, it will react to produce a lot of gas and gas will also be mixed in the mold pouring process. Therefore, degassing operations must be performed during the mold pouring process to improve the density of the autoclaved aerated concrete blocks, improve physical properties and improve surface quality.

[0003] At present, mold casting is generally treated by vibrating to remove bubbles, but the vibration position is fixed, resulting in poor debubble efficiency, and it is easy for bubbles to be incompletely removed, thereby reducing the casting quality. Secondly, during the casting process, because the slurry pouring position is fixed, it is easy for there to be more slurry in the middle pouring position and less at both ends. Therefore, while the slurry is unevenly distributed, there will be more bubbles in the middle and fewer bubbles on both sides. This further reduces the debubble efficiency and effect, and correspondingly will further reduce the casting quality. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an autoclaved aerated concrete block casting and molding device, which includes a lifting frame on which a casting head and a defoaming mechanism are installed; the defoaming mechanism includes a symmetrically arranged mounting seat, which is reciprocatingly slidably connected to the lifting frame, and a plurality of vibrating heads and a plurality of mixing heads are installed on the mounting seat, and the plurality of mixing heads are divided into two groups and are symmetrically distributed, and the symmetrically distributed mixing heads have opposite stirring directions, and the two groups of mixing heads on the same side of the two symmetrical mounting seats are a mixing and homogenizing unit, and the two groups of mixing heads in the mixing and homogenizing unit rotate in opposite directions and the rotation direction is fixed.

[0005] The stirring head comprises a rotating part, to which are connected a plurality of stirring rods and a plurality of homogenizing parts, the plurality of stirring rods and the plurality of homogenizing parts are all distributed along the rotation path of the rotating part, and the stirring rod is slidably connected to the rotating part. During the pouring process, the lifting frame intermittently rises, and the mounting seat reciprocates. The stirring heads in the two stirring and homogenizing units continuously rotate along their rotation direction, and automatically move the slurry in the middle to both sides during the stirring and defoaming process. The vibrating head and the stirring head cooperate to remove bubbles in the slurry by a combination of stirring and vibrating. During the initial rising process of the lifting frame, the pouring head, the vibrating head and the homogenizing part rise synchronously, and the stirring rod rises asynchronously, so that the stirring rod simultaneously stirs and defoams the slurry that has been vibrated and the slurry that is being vibrated, and the homogenizing part timely homogenizes the pouring liquid as the rotating part rotates.

[0006] In one possible implementation, the top end of the stirring rod is connected to a limiting head, the stirring rod and the rotating part are clearance-matched, and a contact limiting ball is rotatably connected to the rotating part. The contact limiting ball is distributed along the circumference of the stirring rod and is located between the stirring rod and the rotating part.

[0007] In one possible implementation, a rotation control assembly is provided between the rotating member and the lifting frame, and the rotation control assembly includes a ratchet, a first ratchet and a second ratchet. The first ratchet and the second ratchet are evenly distributed along the sliding direction of the mounting seat. The first ratchet and the second ratchet rotate in opposite directions and are respectively located on both sides of the ratchet. During the reciprocating sliding of the mounting seat, the ratchet intermittently engages with the first ratchet and the second ratchet to automatically control the corresponding rotating member to rotate continuously in one direction.

[0008] In a possible implementation, the homogenizing member includes a connecting rod and a homogenizing plate. The homogenizing plate is fixedly connected to the rotating member through the connecting rod, and the homogenizing plate extends along the radial direction of the rotating member.

[0009] In a possible implementation, the lower end of the stirring rod is wavy, and when the stirring rod stirs the slurry, it uses the wavy lower end to expand the range of its own stirring and homogenization.

[0010] In a possible implementation, the rotating member includes a mounting ring and a connecting ring located below the mounting ring, the mounting ring is rotatably connected to the mounting seat, and a fixing rod is connected between the connecting ring and the mounting ring.

[0011] In a possible implementation, the stirring rods and the homogenizing elements distributed along the rotation path of the rotating element are distributed alternately in sequence.

[0012] In one possible implementation, a driving cylinder is installed on the lifting frame, and the driving cylinder is connected to one of the mounting seats. A linkage is connected between the symmetrically distributed mounting seats. When the driving cylinder controls the mounting seat connected to it to slide back and forth, the mounting seat drives the other mounting seat to slide in the opposite direction synchronously through the linkage.

[0013] The present invention also provides a method for casting and forming autoclaved aerated concrete blocks, comprising the following steps: S1, preliminary grouting: the lifting frame descends, the casting head and the defoaming mechanism penetrate into the mold, and then a certain amount of slurry is injected into the mold.

[0014] S2, start debubbling: based on step S1, start the debubbling mechanism to debubble, and continue grouting during the debubbling process.

[0015] S3. On the basis of step S2, the lifting frame is intermittently moved upwards. During this process, grouting and degassing are continuously performed.

[0016] S4, continue the grouting and debubbling process of step S3 until the slurry fills the mold, then continue to move the lifting frame upward to move the pouring head and the debubbling mechanism out of the mold, and send the mold to the next processing step.

[0017] The above one or more technical schemes in the embodiments of the present invention have at least one of the following technical effects: 1. The present invention performs pouring and defoaming at the same time, which improves the efficiency and quality of pouring. In the process of defoaming, the vibrating head and the stirring head cooperate with each other to fully and efficiently remove the bubbles in the slurry, and utilize two stirring and homogenizing units to automatically move the middle slurry to both sides during the stirring and defoaming process, thereby homogenizing the slurry in the mold, effectively avoiding the influence of uneven distribution of the slurry on the defoaming effect and efficiency, and then fully and efficiently removing the bubbles in the slurry, further improving the efficiency and quality of pouring.

[0018] 2. The stirring rod used in the present invention stirs and defoams the slurry that has completed the vibration defoaming treatment and the slurry that is undergoing the vibration defoaming treatment during the continuous pouring process, fully removing the bubbles in the slurry, further improving the defoaming effect, and correspondingly improving the pouring quality.

[0019] 3. The rotation control assembly used in the present invention automatically controls the rotating part to rotate continuously in one direction during the reciprocating movement of the mounting seat, without the need for additional drive, and has a simple structure, which facilitates smooth and stable defoaming work. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an autoclaved aerated concrete block casting and molding device provided by an embodiment of the present invention;

[0021] Figure 2It is a partial cross-sectional schematic diagram of a device for casting and forming autoclaved aerated concrete blocks provided by an embodiment of the present invention;

[0022] Figure 3 This is the structural intention of a mixing head of an autoclaved aerated concrete block casting and forming device provided in an embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a mounting base of an autoclaved aerated concrete block casting and forming device provided in an embodiment of the present invention;

[0024] Figure 5 It is a structural schematic diagram of a stirring rod and a homogenizing member of an autoclaved aerated concrete block casting and forming device provided in an embodiment of the present invention;

[0025] Figure 6 It is a structural schematic diagram of a rotation control assembly of an autoclaved aerated concrete block casting and forming device provided by an embodiment of the present invention;

[0026] Figure 7 yes Figure 6 The enlarged view of point A in the middle;

[0027] Figure 8 The present invention is a schematic diagram of a ratchet movement process of a device for casting and forming autoclaved aerated concrete blocks provided by an embodiment of the present invention.

[0028] In the figure: 1. pouring head; 2. defoaming mechanism; 21. mounting seat; 22. vibrating head; 23. stirring head; 231. rotating part; 2311. mounting ring; 2312. connecting ring; 2313. fixing rod; 232. stirring rod; 233. homogenizing part; 2331. connecting rod; 2332. homogenizing plate; 234. limiting head; 235. contact limiting ball; 24. rotation control assembly; 241. ratchet; 242. first ratchet; 243. second ratchet; 25. linkage; 3. lifting frame; 4. driving cylinder; 5. mold; 6. pouring port. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0030] See also Figure 1 and Figure 2A device for casting and forming autoclaved aerated concrete blocks comprises a lifting frame 3 equipped with a casting head 1 and a defoaming mechanism 2. During the casting process, the lifting frame 3 moves up intermittently, and the casting head 1 and the defoaming mechanism 2 cooperate to remove bubbles while casting. In the defoaming process, the defoaming mechanism 2 performs efficient defoaming treatment on the casting liquid in a moving state, and can fully and quickly eliminate bubbles in the casting liquid. At the same time, in the defoaming process, the defoaming mechanism 2 simultaneously performs homogenization treatment on the slurry in the mold 5. When the casting head 1 is fixed in position, the slurry injected into the mold 5 can be quickly homogenized, thereby effectively avoiding the situation where the defoaming efficiency and effect are affected by uneven distribution of the slurry, and the overall casting efficiency and quality are effectively improved.

[0031] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The defoaming mechanism 2 includes a mounting seat 21 symmetrically arranged front and back, the mounting seat 21 is connected to the lifting frame 3 by reciprocating sliding left and right, the symmetrical mounting seat 21 slides in the opposite direction synchronously, a plurality of vibrating heads 22 and a plurality of stirring heads 23 are installed on the mounting seat 21, the plurality of stirring heads 23 are evenly divided into two groups and the two groups of stirring heads 23 are symmetrically distributed left and right, the stirring directions of the symmetrically distributed stirring heads 23 are opposite, the two groups of stirring heads 23 on the same side of the two symmetrical mounting seats 21 are a stirring and homogenizing unit, the two groups of stirring heads 23 in the stirring and homogenizing unit rotate in opposite directions and the rotation direction is fixed, the number of the vibrating heads 22 and the stirring heads 23 on the mounting seat 21 are both four, and in the process of the mounting seat 21 reciprocating left and right, the vibrating head 22 and the stirring head 23, defoaming treatment is carried out in a manner of vibrating and stirring, which can effectively improve the efficiency and effect of defoaming; at the same time, the two stirring heads 23 at the left end of the rear mounting seat 21 rotate clockwise for stirring, and the two stirring heads 23 at the right end rotate counterclockwise for stirring, the two stirring heads 23 at the left end of the front mounting seat 21 rotate counterclockwise for stirring, and the two stirring heads 23 at the right end rotate clockwise for stirring, and the two stirring heads 23 at the left end of the rear mounting seat 21 that rotate clockwise for stirring and the two stirring heads 23 at the left end of the front mounting seat 21 that rotate counterclockwise for stirring are a stirring and homogenizing unit; the casting head 1 is located at the center of the mold 5, and the casting head 1 is symmetrically provided with casting ports 6, and the casting ports 6 are symmetrically distributed on the left and right (such as Figure 4 As shown in the figure, the slurry flows out from the pouring port 6 and enters the mold 5. During the reciprocating movement of the stirring head 23 with the mounting seat 21, the slurry in the middle can be distributed to the left and right sides, so that the slurry is quickly in a uniform state, which is correspondingly beneficial to improve the efficiency and effect of degassing.

[0032] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The stirring head 23 includes a rotating member 231, and the rotating member 231 is connected with a plurality of stirring rods 232 and a plurality of homogenizing members 233. The plurality of stirring rods 232 and the plurality of homogenizing members 233 are all distributed along the rotation path of the rotating member 231, and the stirring rods 232 and the homogenizing members 233 distributed along the rotation path of the rotating member 231 are alternately distributed in sequence. The stirring rods 232 are connected to the rotating member 231 by sliding up and down, and the homogenizing members 233 are fixedly connected to the rotating member 231. During the initial pouring process, when the lifting frame 3 rises, the installation The seat 21 rises synchronously with the vibrating head 22, while the stirring rod 232 does not rise synchronously therewith. At this time, the stirring rod 232 simultaneously defoams the slurry that has been vibrated and defoamed and the slurry that is being vibrated and defoamed in the mold 5, fully removing the bubbles in the slurry and further improving the defoaming effect. Among them, the lower end of the stirring rod 232 is wavy. When the stirring rod 232 stirs the slurry that has been vibrated and defoamed, the wavy lower end is used to expand the range of its stirring and homogenizing, thereby improving the defoaming effect.

[0033] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 8 The rotating member 231 includes a mounting ring 2311 and a connecting ring 2312 located below the mounting ring 2311. The mounting ring 2311 is rotatably connected to the mounting seat 21. A fixing rod 2313 is connected between the connecting ring 2312 and the mounting ring 2311. A rotation control assembly 24 is arranged between the mounting ring 2311 and the lifting frame 3. The rotation control assembly 24 includes a ratchet 241, a first ratchet 242 and a second ratchet 243. The first ratchet 242 and the second ratchet 243 are evenly distributed on the lifting frame 3 along the sliding direction of the mounting seat 21. The first ratchet 242 and the second ratchet 243 are both rotatably connected to the limiting L-shaped plate. The limiting L-shaped plate is fixedly installed on the lifting frame 3. The rotation points of the first ratchet 242 and the second ratchet 243 correspond to the corresponding corner positions of the limiting L-shaped plates. The two corresponding front and rear limiting L-shaped plates are centrally symmetrically arranged and the corners are relatively arranged (such as Figure 6 As shown in the figure, limited by the horizontal longitudinal section of the corresponding limiting L-shaped plate, the first ratchet tooth 242 and the second ratchet tooth 243 are both unidirectionally rotatable, the first ratchet tooth 242 and the second ratchet tooth 243 rotate in opposite directions and are respectively located on both sides of the ratchet wheel 241, the ratchet wheel 241 is coaxial and fixedly connected to the mounting ring 2311, and during the reciprocating sliding process of the mounting seat 21, the ratchet wheel 241 intermittently engages with the first ratchet tooth 242 and the second ratchet tooth 243, automatically controlling the corresponding rotating member 231 to rotate continuously in one direction, without the need for additional driving force, and with a simple structure.

[0034] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 The top end of the stirring rod 232 is connected to a limiting head 234, the stirring rod 232 and the connecting ring 2312 are clearance-matched, and a contact limiting ball 235 is rotatably connected to the connecting ring 2312, and the contact limiting ball 235 is distributed along the circumference of the stirring rod 232 and is located between the connecting ring 2312 and the stirring rod 232. In the initial casting state, the lower end of the stirring rod 232 abuts against the bottom surface of the mold 5, and then with the lifting and lowering of the lifting frame 3, when the limiting head 234 abuts against the connecting ring 2312, the stirring rod 232 will move up with the lifting frame 3, and the contact limiting ball 235 can effectively reduce the friction between the stirring rod 232 and the connecting ring 2312, thereby improving the flexibility of the movement of the stirring rod 232.

[0035] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 The homogenizing member 233 includes a connecting rod 2331 and a homogenizing plate 2332. The homogenizing plate 2332 is fixedly connected to the connecting ring 2312 through the connecting rod 2331, and the homogenizing plate 2332 extends along the radial direction of the connecting ring 2312. During the rotation of the connecting ring 2312, the homogenizing plate 2332 can effectively scrape the slurry in the middle to the left and right sides, thereby increasing the speed of slurry homogenization.

[0036] See also Figure 1 , Figure 2 and Figure 4 A driving cylinder 4 is installed on the lifting frame 3. The driving cylinder 4 is connected to the front mounting seat 21 and controls the mounting seat 21 to reciprocate left and right. A connecting piece 25 is connected between the symmetrically distributed mounting seats 21. When the front mounting seat 21 reciprocates left and right, the rear mounting seat 21 is synchronously driven to reciprocate left and right through the connecting piece 25, and the moving directions of the two mounting seats 21 are opposite, and the overall operation stability is high. Among them, the connecting piece 25 can be a gear plate, which is meshed with the tooth segments set on the two mounting seats 21 at the same time, and the two mounting seats 21 are respectively located on both sides of the connecting piece 25.

[0037] See also Figure 1-Figure 8 The present invention also provides a method for casting and forming autoclaved aerated concrete blocks, comprising the following steps: S1, preliminary grouting: the lifting frame 3 descends, the casting head 1 and the defoaming mechanism 2 penetrate into the mold 5, and then a certain amount of slurry is injected into the mold 5.

[0038] S2, start debubbling: based on step S1, start the debubbling mechanism 2 to debubble, and continue grouting during the debubbling process.

[0039] S3. On the basis of step S2, the lifting frame 3 is intermittently moved upwards. During this process, grouting and degassing are continuously performed.

[0040] S4, continue the grouting and debubbling process of step S3 until the slurry fills the mold 5, then continue to move the lifting frame 3 upward to move the pouring head 1 and the debubbling mechanism 2 out of the mold 5, and send the mold 5 to the next processing step.

[0041] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for casting and forming autoclaved aerated concrete blocks, characterized in that: It includes a lifting frame equipped with a pouring head and a defoaming mechanism; The defoaming mechanism comprises a symmetrically arranged mounting seat, which is reciprocatingly slidably connected to the lifting frame, and a plurality of vibrating heads and a plurality of stirring heads are installed on the mounting seat, and the plurality of stirring heads are divided into two groups and symmetrically distributed, and the stirring directions of the symmetrically distributed stirring heads are opposite, and the two groups of stirring heads on the same side of the two symmetrical mounting seats constitute a stirring and homogenizing unit, and the two groups of stirring heads in the stirring and homogenizing unit rotate in opposite directions and the rotation direction is fixed; The stirring head comprises a rotating member, a plurality of stirring rods and a plurality of homogenizing members are connected to the rotating member, the plurality of stirring rods and the plurality of homogenizing members are distributed along a rotation path of the rotating member, and the stirring rods are slidably connected to the rotating member; During the pouring process, the lifting frame rises intermittently, the mounting seat moves back and forth, and the stirring heads in the two stirring and homogenizing units continue to rotate along their rotation direction. During the stirring and defoaming process, the slurry in the middle is automatically moved to both sides. The vibrating head and the stirring head cooperate to remove bubbles in the slurry in a combination of stirring and vibrating. During the initial rise of the lifting frame, the pouring head, the vibrating head and the homogenizing member rise synchronously, and the stirring rod rises asynchronously, so that the stirring rod simultaneously stirs and defoams the slurry that has been vibrated and the slurry that is being vibrated. The homogenizing member timely homogenizes the pouring liquid as the rotating member rotates. The top end of the stirring rod is connected to a limiting head, the stirring rod is clearance-matched with the rotating member, and a contact limiting ball is rotatably connected to the rotating member. The contact limiting ball is distributed along the circumference of the stirring rod and is located between the stirring rod and the rotating member.

2. The autoclaved aerated concrete block casting and molding device according to claim 1, characterized in that: A rotation control assembly is arranged between the rotating member and the lifting frame, and the rotation control assembly includes a ratchet, a first ratchet and a second ratchet. The first ratchet and the second ratchet are evenly distributed along the sliding direction of the mounting seat. The first ratchet and the second ratchet rotate in opposite directions and are respectively located on both sides of the ratchet. During the reciprocating sliding of the mounting seat, the ratchet intermittently engages with the first ratchet and the second ratchet to automatically control the corresponding rotating member to rotate continuously in one direction.

3. The autoclaved aerated concrete block casting and molding device according to claim 1, characterized in that: The homogenizing member comprises a connecting rod and a homogenizing plate. The homogenizing plate is fixedly connected to the rotating member through the connecting rod, and the homogenizing plate extends along the radial direction of the rotating member.

4. The autoclaved aerated concrete block casting and molding device according to claim 1, characterized in that: The lower end of the stirring rod is wavy. When the stirring rod stirs the slurry, it uses the wavy lower end to expand the range of its own stirring and homogenization.

5. The autoclaved aerated concrete block casting and molding device according to claim 1, characterized in that: The rotating member comprises a mounting ring and a connecting ring located below the mounting ring. The mounting ring is rotatably connected to the mounting seat, and a fixing rod is connected between the connecting ring and the mounting ring.

6. The autoclaved aerated concrete block casting and molding device according to claim 1 or 4, characterized in that: The stirring rods and the homogenizing members distributed along the rotation path of the rotating member are alternately distributed in sequence, and the lowest point of the homogenizing member is higher than the lowest point of the stirring rod.

7. The autoclaved aerated concrete block casting and molding device according to claim 1, characterized in that: A driving cylinder is installed on the lifting frame, and the driving cylinder is connected to one of the mounting seats. A linkage is connected between the symmetrically distributed mounting seats. The driving cylinder controls the mounting seat connected to it to slide back and forth, and the mounting seat drives the other mounting seat to slide synchronously in the opposite direction through the linkage.

8. A method for casting and forming autoclaved aerated concrete blocks, using the autoclaved aerated concrete block casting and forming device according to claim 1, characterized in that: The following steps are involved: S1. Preliminary grouting: The lifting frame descends, the pouring head and the defoaming mechanism penetrate into the mold, and then a certain amount of slurry is injected into the mold; S2, start debubbling: based on step S1, start the debubbling mechanism to debubble, and continue grouting during the debubbling process; S3, on the basis of step S2, intermittently moving the lifting frame upward, during which grouting and degassing are continuously performed; S4, continue the grouting and debubbling process of step S3 until the slurry in the mold reaches a preset value, then continue to move the lifting frame upward to move the pouring head and the debubbling mechanism out of the mold, and send the mold to the next processing step.

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