Automatic mold opening and closing device for small box girder end mold

Abstract

The utility model discloses an automatic mould stripping and closing device for small box girder end mould, including support seat, end mould assembly, at least one transmission system, the support seat is installed in the bottom tire end, the end mould assembly sets up in one side of support seat, the transmission system includes guide pillar, guide bush and hydraulic oil cylinder, and the guide bush is fixedly connected in the support seat, and the guide pillar is slidably arranged in the guide bush, and one end of guide pillar is hingedly connected with end mould assembly, and the other end is connected with the piston rod of hydraulic oil cylinder, and the hydraulic oil cylinder is fixedly installed in the support seat, and is used for driving guide pillar to move along the axial movement to drive end mould assembly to realize automatic mould stripping or mould closing operation. The utility model discloses compact structure, and the assembly is convenient, and the operation is stable, and effectively solve traditional end mould stripping difficult, poor safety, operation intensity big etc. problem, is applicable to the automatic mould stripping system of small box girder prefabricated end mould.

Description

Technical Field

[0001] This utility model relates to the field of small box girder technology, and in particular to an automatic mold release device for the end mold of small box girders. Background Technology

[0002] The protruding reinforcing bars of the beam are a key part of its structural connection, but their existence fundamentally conflicts with the physical space requirements of the end formwork adjustment and demolding mechanism. This leads to core defects such as demolding obstruction, difficulty in adjusting beam length, inefficient and dangerous operation, and easy equipment damage.

[0003] Traditional formwork can cause several problems during prefabrication, including structural interference leading to difficulties in demolding, difficulty or obstruction in adjusting beam length, low operational efficiency and safety risks, and easy equipment damage. Structural interference caused difficulties in demolding: the end formwork could not detach smoothly from the beam along its length. After the main formwork, such as the side and bottom forms, was removed, the beam was basically exposed, but the end formwork remained attached to the beam end. Operators began operating the adjusting screws or attempting to move the beam length adjustment mechanism to detach the end formwork from the concrete surface. The pre-embedded reinforcing bars at the beam end blocked the connection between the inner side of the end formwork and the concrete end face of the beam. When the end face attempted to move outward, the reinforcing bars directly pressed against the inner side plate of the end formwork or protruding structures such as ribs and fasteners on the end formwork. The larger the diameter, number, and density of the reinforcing bars, the more pronounced the blocking effect. The end formwork was stuck by the reinforcing bars and could not move further outward. Forced operation may result in bending of the reinforcing bars, deformation of the end formwork, or damage to the adjustment mechanism.

[0004] The function of adjusting beam length is difficult or limited: There are obvious drawbacks when adjusting beam length with adjusting screws. Manually adjusting each screw is cumbersome and time-consuming; the accuracy is difficult to guarantee due to human factors; the fully manual operation is labor-intensive; and it has poor adaptability to different beam length specifications, often requiring the replacement of parts, which increases costs and preparation time.

[0005] The process is inefficient and poses safety risks: the demolding process is cumbersome and time-consuming, requiring additional manual intervention, and the operating environment is hazardous. Operators may find that the end formwork is stuck by rebar or the adjustment mechanism is inoperable. Additional measures are required, such as forcibly prying the end formwork with a crowbar, striking the end formwork or rebar with a sledgehammer to deform and reposition it, partially cutting or bending the rebar, disassembling part of the adjustment mechanism, or using additional manpower to forcibly drag it. These measures lead to delays in demolding time, and the crowbar slipping, rebar springing, or heavy objects falling accidentally could cause injuries such as being struck or cut.

[0006] The equipment is prone to damage: adjusting screws, lead screws, nuts, etc., are easily deformed or damaged during forced operation. When interference exists, operators may apply excessive force to complete demolding or adjustment, potentially causing the adjusting screw to bend, the threads to break, the nut to crack, or dents, perforations, or overall warping deformation to occur on the end formwork panel where it is pressed by reinforcing bars. Damaged parts require repair or replacement, increasing maintenance and time costs. Deformed end formwork or adjusting mechanisms will reduce accuracy, affecting the dimensional accuracy of subsequent beam precasting. Utility Model Content

[0007] The purpose of this invention is to provide an automatic mold opening and closing device for the end molds of small box girders, so as to achieve precise, synchronous and automated mold opening and closing control of the end molds, improve prefabrication efficiency and end dimension accuracy, improve the on-site working environment, and adapt to the production needs of small box girders of different types and lengths.

[0008] This utility model is achieved using the following technical solution: an automatic demolding and closing device for end molds of small box girders, characterized in that it includes a support base, an end mold assembly, and at least one transmission system; the support base is installed at the end of the base plate, and the end mold assembly is disposed on one side of the support base; the transmission system includes a guide column, a guide sleeve, and a hydraulic cylinder, wherein the guide sleeve is fixedly connected to the support base, the guide column is slidably inserted in the guide sleeve, one end of the guide column is hinged to the end mold assembly, and the other end is connected to the piston rod of the hydraulic cylinder, the hydraulic cylinder is fixedly installed on the support base, and is used to drive the guide column to move axially, thereby driving the end mold assembly to perform demolding or closing operations. Through this structural design, automatic linear reciprocating motion of the end mold in the beam length direction is realized, effectively avoiding the danger and inefficiency of traditional prying demolding processes.

[0009] Furthermore, the guide post and the end mold assembly are hinged together by a connecting lug using a pin-type connection. This connection method ensures free rotation and uniform force distribution during the movement of the end mold driven by the guide post, improving assembly accuracy and structural reliability.

[0010] Furthermore, the hydraulic cylinder is fixedly mounted on the bracket, and its piston rod is connected to the guide post via a pin. This fixing method ensures the stability of the driving process, and the pin connection improves the ease of replacement and maintenance of the transmission structure.

[0011] Furthermore, the support base includes a support base body and an extended rectangular tube, the extended rectangular tube being laterally disposed on the support base body. This lateral structure enables the support base to be quickly connected to the side mold without increasing the overall volume, facilitating rapid on-site setup and disassembly.

[0012] Furthermore, the side mold is equipped with a side mold fixing rod, which has a slot. The extended rectangular tube is inserted into the slot to achieve a limiting connection between the support base and the side mold. This insert-type limiting method forms a mechanical self-locking structure, improving overall stability and reducing assembly displacement problems caused by construction errors.

[0013] Furthermore, the automatic end mold structure is equipped with multiple transmission systems, and multiple guide pillars are respectively connected to the end mold assembly for synchronously driving the end mold assembly to move in a predetermined direction. Multi-point synchronous driving can achieve stable force on the end mold, avoid end mold tilting or pre-fabricated size deviation caused by force on one side, and improve the overall demolding accuracy.

[0014] Furthermore, the guide post has a wear-resistant coating on its surface, and a removable bushing is provided inside the guide sleeve for guiding and reducing frictional wear. This design improves the durability and ease of maintenance of the device, reduces clearance errors caused by long-term use, and ensures long-term accurate operation of the equipment.

[0015] The automatic demolding device for the end mold of a small box girder described in this utility model has the following advantages: The hydraulically driven automatic mold opening and closing eliminates the need for traditional manual prying of the end molds, reducing operator risks and improving production safety. Components connecting the end molds, guide pillars, and support bases are connected using pin hinges and slot snap-fit ​​methods, facilitating easy assembly and disassembly, and resulting in a compact and reliable structure. Multiple transmission systems enable synchronous multi-point drive, ensuring uniform stress on the end molds during demolding, suitable for various beam types and specifications. The guide pillars feature a wear-resistant coating, and the guide sleeves include replaceable bushings to reduce friction loss and facilitate maintenance and long-term use. The support base's lateral extension structure snaps into the side molds, resulting in a compact overall layout that meets the installation requirements of standardized small box girder production lines. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a side view schematic diagram of an automatic demolding device for the end mold of a small box girder; Figure 2 This is a frontal schematic diagram of an automatic demolding device for the end mold of a small box girder; Figure 3 This is a schematic diagram of the transmission system structure; In the diagram, 1-transmission system, 2-support base, 3-end mold assembly, 4-side mold, 5-bottom tire, 111-guide post, 112-guide sleeve, 121-hydraulic piston rod, 122-hydraulic cylinder, 123-sensor, 21-support base body, 22-extension tube, 23-electric control system, 24-hydraulic pump station, 31-connecting lug, 41-side mold fixing rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example

[0020] like Figure 1-3 As shown, this embodiment provides an automatic mold release device for the end mold of a small box girder, including: a transmission system 1, a support base 2, an end mold assembly 3, a side mold 4, and a base 5.

[0021] The support base 2 is the core load-bearing structure, installed at the end of the base 5 and fixed by bolts. The support base 2 includes a support base body 21, an outwardly extending rectangular tube 22, an electrical control system 23, and a hydraulic pump station 24. The support base body 21 is a rectangular welded steel frame, with the outwardly extending rectangular tube 22 welded to its lateral sides and extending outwards a certain distance for connection and positioning with the side mold 4.

[0022] The extended rectangular tube 22 is snapped into the side mold fixing rod 41 installed on the side mold 4. The side mold fixing rod 41 is provided with a slot. After the extended rectangular tube 22 is inserted into the slot, a stable mechanical fit relationship is formed, which effectively restricts the displacement of the support seat 2 in the lateral direction and improves the stability and accuracy of the structural installation.

[0023] The transmission system 1 consists of four sets, located at four positions on the support body 21. Each set includes a guide post 111 and a matching guide sleeve 112. The guide sleeve 112 is fixed to the support body 21, and the guide post 111 slides through it to achieve linear guidance along the beam length. One end of the guide post 111 is hinged to the connecting lug 31 in the end mold assembly 3 via a pin, and the other end is connected to the hydraulic piston rod 121.

[0024] The hydraulic piston rod 121 is driven to extend and retract by the hydraulic cylinder 122, which is also fixedly mounted on the support body 21. Under hydraulic drive, the piston rod 121 drives the guide column 111 to reciprocate, thereby realizing the automatic opening and closing of the end mold assembly 3 in the beam length direction. Through the coordinated action of the four sets of transmission structures, the end mold is subjected to balanced force during movement, runs smoothly, and avoids dimensional errors caused by end mold skewing or force concentration.

[0025] The electronic control system 23 and the hydraulic pump station 24 are both mounted on the support body 21, forming a centralized integrated control platform. The electronic control system 23 uses a PLC as the core control unit. After receiving operation commands, it controls the solenoid directional valve to switch the oil circuit direction and drive the hydraulic cylinder to move. The sensor 123 is fixed on the hydraulic cylinder 122 to detect the piston displacement and oil pressure of the hydraulic cylinder and feeds the signal back to the PLC to realize closed-loop control.

[0026] During operation, the operator inputs the target beam length through the control panel. The PLC system calculates the cylinder stroke based on this, controls the hydraulic system to drive the end mold to move, and dynamically adjusts the output signal according to the feedback data from sensors 123 to ensure that the end mold is accurately positioned and automatically locked in place.

[0027] In addition, to improve system durability and maintainability, the guide post 111 is coated with a wear-resistant coating, and the guide sleeve 112 is equipped with a replaceable wear-resistant bushing. When the bushing wears out, it can be disassembled and replaced individually, avoiding the need to replace the entire guide sleeve structure, thereby extending the service life of the equipment and reducing maintenance costs.

[0028] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. An automatic demolding device for the end mold of a small box girder, characterized in that, The system includes a support base (2), an end mold assembly (3), and at least one transmission system (1). The support base (2) is installed at the end of the base (5), and the end mold assembly (3) is located on one side of the support base (2). The transmission system (1) includes a guide post (111), a guide sleeve (112), and a hydraulic cylinder (122). The guide sleeve (112) is fixedly connected to the support base (2), and the guide post (111) is slidably inserted in the guide sleeve (112). One end of the guide post (111) is hinged to the end mold assembly (3), and the other end is connected to the piston rod of the hydraulic cylinder (122). The hydraulic cylinder (122) is fixedly installed on the support base (2) and is used to drive the guide post (111) to move axially so as to drive the end mold assembly (3) to perform demolding or mold closing operations.

2. The automatic demolding device for the end mold of a small box girder according to claim 1, characterized in that, The guide post (111) and the end mold assembly (3) are hinged together by a connecting lug (31) in the form of a pin.

3. The automatic demolding device for the end mold of a small box girder according to claim 1, characterized in that, The hydraulic cylinder (122) is fixedly mounted on the bracket (2), and its piston rod (121) is connected to the guide column (111) by a pin.

4. An automatic demolding device for the end mold of a small box girder according to claim 1, characterized in that, The bracket (2) includes a bracket body (21) and an extended rectangular tube (22), which is laterally arranged on the bracket body (21).

5. An automatic demolding device for the end mold of a small box girder according to claim 4, characterized in that, It also includes a side mold fixing rod (41) provided on the side mold (4), which has a slot, and the outwardly extending rectangular tube (22) is inserted into the slot to realize the limiting connection between the support base (2) and the side mold (4).

6. An automatic demolding device for the end mold of a small box girder according to claim 1, characterized in that, It includes multiple transmission systems (1), and multiple guide posts (111) are respectively connected to the end mold assembly (3) for synchronously driving the end mold assembly (3) to move in a predetermined direction.

7. An automatic demolding device for the end mold of a small box girder according to claim 1, characterized in that, The surface of the guide post (111) is provided with a wear-resistant coating, and the guide sleeve (112) is provided with a detachable bushing for guiding and reducing friction and wear.

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