A cover plate culvert prefabricated cover plate demolding device

Abstract

The application provides a cover plate culvert prefabricated cover plate demolding device, which comprises a mold box, a roller line, a pushing mechanism and a pressing mechanism, wherein a bushing is arranged opposite to the wall of the mold box, the bushing is matched with an insertion block and a locking mechanism, and the insertion block is tightly fixed through the locking mechanism; the pushing mechanism comprises a jacking rod, the jacking rod vertically extends upwards to the space between two corresponding rollers of the roller line, and the jacking rod is matched with a pushing element; the pressing mechanism comprises a pressing head corresponding to the one-side bushing of the mold box, and the pressing head is matched with a pressing element. The application realizes noiseless demolding operation and guarantees the production quality of the cover plate.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated culvert production, and in particular relates to a demolding device for prefabricated culvert covers. Background Technology

[0002] Slab culverts are mainly composed of slabs, culvert abutments, culvert body paving, expansion joints, and waterproofing layers. Before the construction of slab culverts, the production of precast slab culvert components must be carried out, including the precast production of slabs and culvert abutments. Since both slabs and culvert abutments are concrete castings, they need to be demolded after pouring and curing to separate the products from the casting molds.

[0003] Currently, the demolding of the cover plate is completed on a vibratory machine. Before demolding, the mold box containing the cast cover plate is first rotated 180° using a flipping device so that the opening of the mold box faces downward. Then, it is moved to the vibratory machine for high-frequency vibration to loosen the contact surface between the cover plate and the mold box. Then, it is removed from the vibratory machine, and subsequently, a suction cup is used to suck the mold box away to complete the demolding operation of the cover plate.

[0004] Using a vibratory machine to demold the cover plate results in several problems. First, the production noise is high, causing environmental pollution. Second, the high-frequency vibration damages the internal structure of the cover plate, reduces the concrete strength, and consequently affects its quality. Summary of the Invention

[0005] In view of this, the present invention aims to provide a demolding device for prefabricated culvert covers to achieve noiseless demolding of the covers and ensure the quality of the covers.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A demolding device for precast culvert covers includes: A mold box for casting cover plates is a rectangular steel plate box with an upward-facing opening. Two long sides of the box wall are provided with insertion holes. Each insertion hole is fitted with a plug, which includes a positioning plate and a protruding plug on its front end. The plug is inserted into and fills the entire insertion hole, with its end face flush with the inner surface of the box wall. A locking mechanism is provided on the corresponding plug on the outer surface of the box wall to tightly press and fix the plug. Roller conveyor lines are used to transport mold boxes; Two sets of pushing mechanisms are symmetrically arranged below the roller conveyor line, and the distance between the two sets of pushing mechanisms corresponds to the width of the mold box. Each set of pushing mechanisms includes a push rod that extends vertically upward into the space between two corresponding rollers on the roller conveyor line, and the push rod is matched with a pushing element. Two sets of pressing mechanisms are symmetrically arranged above the roller conveyor. Each set of pressing mechanisms includes pressing heads arranged sequentially along the roller conveyor, with varying numbers and positions, and corresponding to the single-sided insertion holes of the mold box. Each pressing head is matched with a pressing element.

[0007] Furthermore, each set of the pushing mechanism has two push rods, arranged one in front of the other along the roller conveyor line.

[0008] Furthermore, the clamping element and the pushing element are both cylinders.

[0009] Furthermore, a positioning mechanism is provided in front of the pressing mechanism on the roller conveyor. The positioning mechanism includes a positioning rod provided below the roller conveyor. The top end of the positioning rod extends between two corresponding support rollers of the roller conveyor, and the bottom end of the positioning rod is connected to a positioning cylinder.

[0010] Furthermore, the locking mechanism includes a locking rod and a locking pin. One end of the locking rod is hinged to the mold box. A fixing block is provided on the mold box to match the locking rod. Locking holes are provided on the other end of the locking rod and the corresponding locking pins of the fixing block. The locking rod and the fixing block are locked and fixed by the locking pin.

[0011] Furthermore, each of the two long side walls of the mold box is provided with two insertion holes, and the two corresponding locking mechanisms are symmetrical and the two locking rods are respectively hinged to the mold box at their far ends.

[0012] Furthermore, the mold box is equipped with a magnet on the outside of the hinge, which will attract and fix the locking rod when it is opened.

[0013] Furthermore, notches are respectively opened on the left and right sides of the front end face of the positioning plate.

[0014] Compared with the prior art, the precast cover demolding device for culverts described in this invention has the following advantages: In this invention, the mold box for casting cover plates is equipped with insertion holes and insertion block structures, and a pressing mechanism and a pushing mechanism are set on the roller conveyor. The pressing mechanism and the pushing mechanism work together to realize the demolding operation of the cover plates in the mold box, replacing the conventional vibration demolding method, realizing noiseless demolding operation, and ensuring the production quality of the cover plates. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a front view of a precast culvert cover demolding device according to an embodiment of the present invention; Figure 2 This is a top view of a precast culvert cover demolding device according to an embodiment of the present invention; Figure 3 This is a front view of the mold box in a precast culvert demolding device according to an embodiment of the present invention; Figure 4 This is a top view of the mold box in a precast culvert demolding device according to an embodiment of the present invention; Figure 5 This is a structural diagram of the mold box in a precast culvert demolding device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the insert block structure in an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1-Mold box; 101-Socket; 2-Plug; 21-Plug; 22-Positioning plate; 24-Notch; 3-Locking mechanism; 31-Locking rod; 32-Locking pin; 4-Magnet; 5-Positioning cylinder; 6-Pushing element; 7-Roller line; 8-Pressure element; 9-Pressure head; 11-Push rod; 12-Positioning rod. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 , Figure 2 As shown, a precast culvert cover demolding device includes a mold box 1 for casting the cover and a roller conveyor 7. The mold box 1 is set up according to the corresponding cover production, and sequentially sets up a cover concrete pouring station, a curing station, a turning station, a demolding station, and a material unloading station. The mold box moves on the roller conveyor 7 to complete the corresponding production operations at each station. (Appendix to this invention) Figure 1 and appendix Figure 2 The diagram shown is a schematic of mold box 1 at the demolding station.

[0019] Mold box 1 is a rectangular steel plate box with its opening facing upwards. When mold box 1 moves on roller conveyor 7, the long side of mold box 1 corresponds to the direction of roller conveyor 7. Before the cover plate is poured, the inner wall (inner surface of the box wall) is coated with a release layer to facilitate demolding. The specific structure of mold box 1 is as follows: Figure 3 , Figure 4 and Figure 5 As shown, each of its two long side walls has two sockets 101, and the sockets 101 on the two long side walls face each other. Each socket 101 is matched with a plug block 2. The structure of the plug block 2 is as follows: Figure 6 As shown, the insert 2 is a one-piece molded structure, which can be made of metal or concrete. It includes a square positioning plate 22 and a plug 21 protruding from its front end and matching the socket 101. The plug 21 is inserted into and fills the entire socket 101. The positioning plate 22 abuts against the outer wall (outer surface of the box wall) of the mold box 1. At this time, the end face of the plug 21 is flush with the inner surface of the box wall. A locking mechanism 3 is provided on the corresponding insert 2 on the outer surface of the box wall. The locking mechanism 3 presses and fixes the insert 2 tightly. At this time, the cover plate concrete can be poured inside the mold box 1. After the cover plate is poured and cured, the locking mechanism is opened, the insert 2 is removed, and the demolding operation can be performed.

[0020] The demolding station is equipped with a demolding unit, which includes two sets of pushing mechanisms and two sets of clamping mechanisms. The two sets of pushing mechanisms are symmetrically arranged below the roller conveyor 7, and the two sets of clamping mechanisms are symmetrically arranged above the roller conveyor 7. The distance between the two sets of pushing mechanisms corresponds to the width of the mold box 1. Each set of pushing mechanisms includes two push rods 11 arranged one in front of the other along the direction of the roller conveyor 7. Both push rods 11 are vertically upward and extend into the space between two corresponding support rollers of the roller conveyor 7. Each push rod 11 is matched with a pushing element 6, preferably a cylinder, and each push rod 11 is equipped with one pushing element 6. The pushing element 6 drives the push rod 11 to move upward until the top of the push rod 11 abuts against the mold box wall (at this time, the mold box is in an inverted state with the opening facing down after being flipped by the flipping device). At this time, the two long sides of the mold box 1 contact the push rod 11 respectively. When the pushing element 6 drives the push rod 11 to continue moving upward, it pushes the mold box 1 upward.

[0021] Two sets of clamping mechanisms are symmetrically arranged above the roller conveyor 7. Each set of clamping mechanisms includes two pressure heads 9 arranged sequentially along the roller conveyor 7, with the two pressure heads 9 facing the two insertion holes 101 of the mold box. Each pressure head 9 is matched with a clamping element 8, which is preferably a cylinder. During demolding, the clamping elements on both sides of the mold box 1 drive the pressure heads 9 to move, and the four pressure heads 9 extend into the corresponding insertion holes 101 of the mold box 1, pressing the cover plate to fix it. Then, the pushing mechanism is used to push the mold box 1 upward, causing the cover plate and the mold box to separate. The clamping mechanism and the pushing mechanism are reset, and the mold box moves to the next station (unloading station). Equipment is used to separate the cover plate and the mold box, for example, a suction cup is used to suck the mold box away, thus achieving the separation of the cover plate and the mold box.

[0022] To further improve operational efficiency, a positioning mechanism is installed in front of the pressing mechanism on the roller conveyor 7. This positioning mechanism prevents the mold box from moving further forward, positioning the mold box to facilitate the operation of the pressing and pushing mechanisms. The positioning mechanism includes positioning rods 12 located below the roller conveyor 7. The top of each positioning rod 12 extends between two corresponding support rollers on the roller conveyor 7, and the bottom of each positioning rod 12 is connected to a positioning cylinder 5. Preferably, two positioning rods 12 are symmetrically arranged on the left and right sides, both driven by the positioning cylinder 5. When the mold box moves to the demolding station, the positioning cylinder 5 drives the two positioning rods 12 upwards, preventing the mold box 1 from moving further forward and limiting its demolding position. This allows the pressure head 9 of the pressing mechanism to be aligned with the insertion hole 101 of the mold box, facilitating the insertion of the pressure head into the insertion hole 101.

[0023] In this invention, locking mechanisms 3 are correspondingly provided with insert blocks 2. Since two insertion holes 101 are respectively provided on the left and right walls of the mold box 1, corresponding to two insert blocks 2, two locking mechanisms 3 are respectively provided on the left and right sides of the mold box 1. Each locking mechanism 3 includes a locking rod 31 and a locking pin 32. The locking rod 31 is an iron rod structure, and one end of it is hinged to the mold box 1. A fixing block is provided on the mold box to match the locking rod 31. The other end of the locking rod 31 and the corresponding locking pin of the fixing block are respectively provided with locking holes. The locking rod 31 and the fixing block are locked and fixed by the locking pin 32. In order to facilitate demolding operations, the two locking rods 31 of the two locking mechanisms on the same side are respectively hinged to the mold box 1 at opposite ends. At this time, the ends of the two locking rods 31 with locking holes are close to each other. When it is necessary to remove the insert block 2, the two locking rods 31 can be opened outward to prevent the two locking rods 31 from affecting each other. In order to fix the locked rod 31 after it is opened, a magnet 4 is provided on the outside of the hinge of the mold box 1. When the locking rod 31 is opened, the magnet 4 will attract and fix the locking rod 31.

[0024] In this invention, notches 24 are respectively opened on the left and right sides of the front end face of the positioning plate 22, such as... Figure 6 As shown. The notch 24 is designed to allow the insert block 2 to be pried outwards from the notch 24 using a tool such as a screwdriver after the cover plate has been poured, so that the insert block 2 can be easily removed.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A demolding device for precast culvert covers, characterized in that: include: A mold box (1) for casting cover plates is a rectangular steel plate box with the opening facing upwards. The two long side walls of the box are provided with insertion holes (101). The insertion holes (101) are matched with insertion blocks (2). The insertion blocks (2) include a positioning plate (22) and a plug (21) protruding from its front end. The plug (21) is inserted into and fills the entire insertion hole (101). The end face of the plug (21) is flush with the inner surface of the box wall. A locking mechanism (3) is provided on the corresponding insertion blocks (2) on the outer surface of the box wall. The insertion blocks (2) are pressed and fixed by the locking mechanism (3). Roller conveyor (7) is used to transport mold boxes; Two sets of push mechanisms are symmetrically arranged below the roller conveyor (7). The distance between the two sets of push mechanisms corresponds to the width of the mold box (1). Each set of push mechanisms includes a push rod (11), which extends vertically upward to the space between two corresponding rollers of the roller conveyor (7). The push rod (11) is matched with a push element (6). Two sets of pressing mechanisms are symmetrically arranged above the roller conveyor (7). Each set of pressing mechanisms includes pressing heads (9) arranged sequentially along the roller conveyor (7) and corresponding to the single-sided insertion hole (101) of the mold box (1). The pressing head (9) is matched with a pressing element (8).

2. The precast cover demolding device for a culvert according to claim 1, characterized in that: Each set of the pushing mechanism has two push rods (11), arranged one in front of the other along the roller conveyor line (7).

3. The precast cover demolding device for a culvert according to claim 1, characterized in that: The clamping element (8) and the pushing element (6) are cylinders.

4. The precast cover demolding device for a culvert according to claim 1, characterized in that: The roller conveyor (7) is provided with a positioning mechanism in front of the pressing mechanism. The positioning mechanism includes a positioning rod (12) provided below the roller conveyor (7). The top end of the positioning rod (12) extends between two corresponding rollers of the roller conveyor (7), and the bottom end of the positioning rod (12) is connected to a positioning cylinder (5).

5. The precast cover demolding device for a culvert according to claim 1, characterized in that: The locking mechanism (3) includes a locking rod (31) and a locking pin (32). One end of the locking rod (31) is hinged to the mold box (1) by a hinge. A fixing block is provided on the mold box to match the locking rod. Locking holes are provided on the other end of the locking rod (31) and the corresponding locking pin of the fixing block. The locking rod (31) and the fixing block are locked and fixed by the locking pin (32).

6. A precast culvert cover demolding device according to claim 5, characterized in that: The mold box (1) has two insertion holes (101) on each of its two long side walls. The two locking mechanisms are symmetrical and the two locking rods (31) are hinged to the mold box (1) at their far ends.

7. A precast culvert cover demolding device according to claim 6, characterized in that: The mold box (1) has a magnet (4) on the outside of the hinge, which will attract and fix the locking rod (31) when the locking rod (31) is opened.

8. A precast culvert cover demolding device according to claim 1, characterized in that: The positioning plate (22) has notches (24) on the left and right sides of its front end face.

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