Safety hoisting device for highway bridge construction

Abstract

The utility model relates to road and bridge construction technical field especially is safe hoisting device for road and bridge construction, including hoist body, the suspension department below of hoist body is equipped with hoisting box, the top fixed connection of hoisting box has middle box board, the both sides symmetrical of middle box board are equipped with side box board, the front side of hoisting box is equipped with open and close subassembly, the rear side of hoisting box is equipped with balance subassembly, open and close subassembly including fixed installation in the first mount of hoisting box front side top center place, the top of first mount is equipped with a pair of the driving gear of up and down coaxial setting, the front and back both sides of driving gear all are equipped with the tooth plate, in the utility model, open and close subassembly drive up and down coaxial driving gear through servo motor, drive tooth plate and staggered setting adjustment support pole synchronous push and pull side box board, realize side box board stable closure, replace traditional unshielded open type hopper, effectively avoid hoist body start and stop too fast or when sand and stone, cement from edge slip when meeting airflow.

Description

Technical Field

[0001] This utility model relates to the field of highway bridge construction technology, specifically to a safety hoisting device for highway bridge construction. Background Technology

[0002] Highway bridge construction refers to the engineering activities of building bridges across obstacles (such as rivers, valleys, roads, railways, etc.) in a highway transportation system. This process involves multiple aspects such as bridge design, material selection, construction technology, and subsequent maintenance. The purpose of highway bridge construction is to ensure the safety, durability, and functionality of the bridge, while also taking into account cost-effectiveness and environmental impact. Safety hoisting devices for highway bridge construction are lifting and hoisting equipment specially designed for the bridge construction process. They aim to ensure construction safety and improve construction efficiency. They are used to hoist construction materials and equipment such as precast components, steel bars, and formwork for bridges. Before use, the equipment must be inspected to ensure that it is in good condition, so as to ensure the safety of construction personnel and the smooth progress of the project. When hoisting sand, gravel, and cement using lifting equipment in highway bridge construction, traditional lifting equipment often uses open hoppers for material hoisting. Due to the lack of a top shielding structure, the material is controlled solely by the tilt angle of the hopper during hoisting. If the hoist starts or stops too quickly or encounters airflow, sand, gravel, and cement can easily slip off the edge of the hopper, making it difficult to effectively prevent materials from falling. Furthermore, the hoisting height in bridge construction is relatively high, and falling materials can generate enormous impact forces, leading to personnel injuries, equipment damage, material losses, and project delays. Therefore, a safe hoisting device for highway bridge construction is proposed to address the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a safe hoisting device for highway bridge construction, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A safety hoisting device for highway bridge construction includes a hoisting machine body. A hoisting box is provided below the suspension point of the hoisting machine body. A middle box plate is fixedly connected to the top of the hoisting box. Side box plates are symmetrically provided on both sides of the middle box plate. An opening and closing assembly is provided on the front side of the hoisting box, and a balancing assembly is provided on the rear side of the hoisting box. The opening and closing assembly includes a first mounting seat fixedly installed at the center of the top of the front side of the hoisting box. A pair of drive gears arranged coaxially are provided above the first mounting seat. Tooth plates are provided on both the front and rear sides of the drive gears. The two tooth plates are respectively meshed with the two drive gears. Adjusting rods are fixedly installed at the ends of the two tooth plates that are far apart from each other. The two adjusting rods are staggered.

[0005] As a further optimization of this utility model, a hoisting assembly is provided at the top center of the middle box plate, and the hoisting box is connected to the suspension point of the hoisting machine body through the hoisting assembly and the hook at the suspension point of the hoisting machine body.

[0006] As a further optimization of this utility model, a servo motor is fixedly connected to the bottom center of the first mounting base, the output end of the servo motor passes through the first mounting base, and the output end of the servo motor is fixedly connected to the center of the two drive gears.

[0007] As a further optimization of this utility model, the front and rear ends of the top of the side panel are fixedly connected to connecting blocks, and the ends of the two adjusting rods away from the toothed plate are respectively fixedly connected to the adjacent connecting blocks in front.

[0008] As a further optimization of this utility model, the balancing assembly includes a second mounting base fixedly installed at the center of the top rear side of the hoisting box, a support slide fixedly connected to the top of the second mounting base, and a pair of balancing support rods provided on the rear side of the connecting support block located at the rear.

[0009] As a further optimization of this utility model, the two balance rods are staggered, the balance rods movably pass through the support slide, one end of the balance rod is provided with a limit baffle, and the other end of the balance rod is fixedly connected to the connecting block located at the rear.

[0010] As a further optimization of this utility model, a sealing groove is provided on the side of the middle box panel near the side box panel, and a sealing strip is embedded on the side of the side box panel near the middle box panel. The sealing strip and the sealing groove are positioned correspondingly and matched in specifications.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the opening and closing assembly is driven by a servo motor to drive the upper and lower coaxial drive gears, which in turn drive the toothed plate and the staggered adjusting support rods to push and pull the side box plate synchronously, thereby achieving stable closure of the side box plate. Together with the sealing groove of the middle box plate and the sealing strip of the side box plate, a complete closed space is formed, replacing the traditional open hopper without any obstruction. This effectively prevents sand, gravel, and cement from sliding off the edges when the hoist body starts or stops too quickly or when encountering airflow. The balancing assembly ensures that the side box plate is subjected to balanced forces and slides synchronously during the opening and closing process, preventing the box from tilting and causing material to be squeezed out, and further eliminating the risk of material falling. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the rear structure of this utility model; Figure 3 This is a structural schematic diagram of the hoisting box of this utility model; Figure 4 This is an exploded view of the structure of the hoisting box of this utility model; Figure 5 This is a structural schematic diagram of the side panel of this utility model; Figure 6 This is a schematic diagram of the opening and closing component of this utility model; Figure 7 This utility model Figure 3 Enlarged view of point A; Figure 8 This utility model Figure 5 Enlarged view of point B.

[0013] In the diagram: 1. Hoist body; 2. Hoisting box; 3. Middle box plate; 31. Sealing groove; 4. Hoisting assembly; 5. Side box plate; 51. Sealing strip; 6. Opening and closing assembly; 61. First mounting base; 62. Drive gear; 63. Gear plate; 64. Adjusting support rod; 65. Servo motor; 7. Balancing assembly; 71. Second mounting base; 72. Support slide; 73. Balancing support rod; 8. Connecting support block. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Please see Figures 1-8 This utility model provides a technical solution: A safety hoisting device for highway bridge construction includes a hoisting machine body 1. A hoisting box 2 is provided below the suspension point of the hoisting machine body 1. A middle box plate 3 is fixedly connected to the top of the hoisting box 2. Side box plates 5 are symmetrically provided on both sides of the middle box plate 3. An opening and closing assembly 6 is provided on the front side of the hoisting box 2, and a balancing assembly 7 is provided on the rear side of the hoisting box 2. The opening and closing assembly 6 includes a first mounting seat 61 fixedly installed at the center of the top of the front side of the hoisting box 2. A pair of drive gears 62 arranged coaxially are provided above the first mounting seat 61. Tooth plates 63 are provided on both the front and rear sides of the drive gears 62. The two tooth plates 63 are respectively meshed with the two drive gears 62. Adjusting support rods 64 are fixedly installed at the ends of the two tooth plates 63 that are far apart from each other. The two adjusting support rods 64 are staggered.

[0017] It should be noted that: the hoist body 1 is the power source, and the hook at its suspension point is made of high-strength alloy steel with a wear-resistant surface treatment, which is suitable for the heavy hoisting needs of bulk materials such as sand, gravel and cement in bridge construction. The hoisting box 2 is the core of material bearing, which is welded from Q355B low alloy high-strength steel. It has good load-bearing capacity, can hold a sufficient amount of sand, gravel and cement and is not easily deformed, providing a basic structural guarantee to prevent materials from falling. As a further implementation of this scheme, a hoisting assembly 4 is provided at the top center of the middle box plate 3, and the hoisting box 2 is connected to the suspension point of the hoisting machine body 1 through the hoisting assembly 4 and the hook at the suspension point of the hoisting machine body 1. It should be noted that: the middle box plate 3 is fixed to the top center of the lifting box 2, and the lifting assembly 4 at its top is connected to the middle box plate 3 by high-strength bolts. The ear plate hole diameter in the lifting assembly 4 is precisely matched with the lifting hook of the lifting machine to ensure that the lifting box 2 is stably suspended and reduce the risk of falling. As a further implementation of this solution, a servo motor 65 is fixedly connected to the bottom center of the first mounting base 61. The output end of the servo motor 65 passes through the first mounting base 61, and the output ends of the servo motor 65 are fixedly connected to the center of the two drive gears 62. The front and rear ends of the top of the side box plate 5 are fixedly connected to the connecting blocks 8. The ends of the two adjusting rods 64 away from the toothed plate 63 are fixedly connected to the adjacent connecting blocks 8 in front. It should be noted that: the first mounting base 61 is fixed to the top front side of the hoisting box 2, providing stable support for the servo motor 65 and the drive gear 62. The output end of the servo motor 65 is fixed to the two coaxial drive gears 62, which can drive the two drive gears 62 to rotate synchronously, ensuring that there is no delay in the transmission on both sides and avoiding the box opening from tilting and leaking material due to unilateral opening and closing. Furthermore, the toothed plates 63 (45# steel, tempered and quenched on the tooth surface) on both sides of the drive gear 62 mesh with the gear to form a transmission chain of "servo motor 65 - drive gear 62 - toothed plate 63"; the adjusting support rods 64 at the ends of the toothed plates 63 are staggered, with one end fixed to the toothed plate 63 and the other end connected to the connecting block 8 on the top of the side box plate 5. When the servo motor 65 drives the drive gear 62 to rotate, the toothed plates 63 drive the adjusting support rods 64 to push and pull the side box plate 5. When loading, the side box plate 5 closes inward synchronously, forming a closed box opening with the middle box plate 3 to prevent sand and cement from falling from the height of the box opening; when unloading, the side box plate 5 opens outward slowly synchronously to avoid material spillage due to excessive opening and closing, further improving the safety of preventing falling. As a further implementation of this solution, the balancing assembly 7 includes a second mounting base 71 fixedly installed at the center of the top of the rear side of the hoisting box 2. A support slide 72 is fixedly connected to the top of the second mounting base 71. A pair of balancing support rods 73 are provided on the rear side of the connecting support block 8 located at the rear. The two balancing support rods 73 are staggered and can move through the support slide 72. One end of the balancing support rod 73 is provided with a limit baffle, and the other end of the balancing support rod 73 is fixedly connected to the connecting support block 8 located at the rear. It should be noted that: the balancing component 7 ensures that there is no offset or jamming during the opening and closing of the side box 5 through synchronous guidance and force balance, providing a stable premise for preventing materials from falling. The second mounting base 71 is fixed to the top of the rear side of the hoisting box 2. The inner diameter of the top support slide 72 (made of wear-resistant cast iron with chrome-plated inner wall) is precisely matched with the balance support rod 73, providing stable guidance for the sliding of the balance support rod 73 and avoiding offset when the side box 5 is opened and closed. Furthermore: Two balance support rods 73 are staggered, with one end welded to the connecting support block 8 on the rear side of the side panel 5, and the other end movably passing through the support slide 72 and having a limiting baffle (to prevent the balance support rod 73 from coming off). When the side panel 5 slides under the drive of the opening and closing assembly 6, the balance support rod 73 slides synchronously along the support slide 72. The staggered structure balances the lateral force transmitted by the support rod 64, preventing the side panel 5 from tilting due to excessive force on one side. When the side panel 5 shows a tendency to tilt, the balance support rod 73 will correct it in time through the constraint of the support slide 72, ensuring that the two side panels 5 always open and close synchronously, and preventing sand and cement from falling from the gaps due to the tilt of the side panel 5. As a further implementation of this solution, a sealing groove 31 is provided on the side of the middle box panel 3 near the side box panel 5, and a sealing strip 51 is embedded on the side of the side box panel 5 near the middle box panel 3. The sealing strip 51 and the sealing groove 31 are positioned correspondingly and matched in specifications. It should be noted that the sealing groove 31 of the middle box panel 3 and the sealing strip 51 (EPDM rubber, aging resistant) of the side box panel 5 form a tight seal: when the side box panel 5 is closed, the sealing strip 51 is embedded in the sealing groove 31, filling the tiny gap between the middle box panel 3 and the side box panel 5, preventing sand and cement particles from leaking out from the gap, further enhancing the anti-falling effect, and at the same time preventing rainwater and dust from entering the box and affecting the quality of the materials.

[0018] Workflow: First, start the servo motor 65 of the opening and closing component 6. The output end of the servo motor 65 drives two coaxial drive gears 62 to rotate clockwise (the speed is adjusted to a low gear to avoid opening and closing too quickly). The drive gears 62 mesh with the toothed plates 63 on the front and rear sides, causing the toothed plates 63 on both sides to move in opposite directions (the left toothed plate 63 extends to the left and the right toothed plate 63 extends to the right). The adjusting support rod 64 at the end of the toothed plate 63 pushes and pulls the connecting support block 8 at the front of the top of the side box plate 5 in sync. At this time, the balancing assembly 7 works in sync: the connecting block 8 on the rear side of the side box plate 5 drives the balancing support rod 73 to slide along the support slide 72 (wear-resistant cast iron material, chrome-plated inner wall). The support slide 72 guides and restricts the balancing support rod 73 to move only in the horizontal direction, preventing the side box plate 5 from shifting up and down; the staggered balancing support rods 73 balance the lateral force transmitted by the adjusting support rod 64, ensuring that the two side box plates 5 open outward at the same speed (the opening range is adjusted according to the material loading capacity) until the loading requirements of sand, gravel and cement are met, and then the servo motor 65 is turned off; Sand and cement are loaded into the hoisting container 2 using a loader or conveyor belt. During the loading process, the bottom of the hoisting container 2 remains in contact with the ground to prevent the container from being suspended and causing the material to tip over. At the same time, the loading amount is controlled (not exceeding 80% of the rated load capacity of the hoisting container 2) to prevent the material from piling up too high and exceeding the container opening, thus reducing the risk of falling. After loading is completed, the servo motor 65 is started to reverse, and the drive gear 62 drives the toothed plate 63 to retract inward. The adjusting rod 64 pulls the connecting support block 8, so that the two side box plates 5 slide synchronously towards the middle box plate 3. During the process, the balancing component 7 continues to play a role: the balancing support rod 73 slides in the opposite direction along the support slide 72, and the limit baffle prevents the support rod from coming off. At the same time, it maintains the opening and closing balance of the side box plates 5 to avoid the material being squeezed to one side due to the rapid closing of one side. When the side box panel 5 is attached to the middle box panel 3, the sealing strip 51 (EPDM rubber) on the inner side of the side box panel 5 is completely embedded in the sealing groove 31 of the middle box panel 3, forming a tight seal and filling the gap between the panels (preventing small sand and gravel particles from leaking out); at this time, the servo motor 65 is turned off, the side box panel 5 is completely closed, and the hoisting box 2 forms a closed space, which structurally prevents materials from falling from a height during hoisting. During hoisting, operate the hoisting machine body 1 and connect the hook at its suspension point to the hoisting component 4 of the top middle box plate 3 of the hoisting box 2, ensuring that the hook and the hoisting ear plate are precisely aligned. Start the hoisting machine and slowly lift the hoisting box 2, transporting it to the designated unloading point for bridge construction (such as the formwork pouring area or material stacking area). Slowly lower the hoisting box 2 so that the bottom contacts the ground stably, avoiding shaking of the box during unloading. Restart the servo motor 65 to rotate forward and repeat the initial opening process: drive gear 62 drives toothed plate 63 and adjusting support rod 64 to push side box 5 to open synchronously. Balance component 7 assists in maintaining opening and closing balance until side box 5 is opened to the width required for unloading. By tilting the hoisting box 2 or using unloading tools (such as scrapers), the sand and cement inside are completely unloaded. After unloading is completed, start the servo motor 65 to rotate in reverse so that side box 5 closes synchronously. After checking the fit of sealing strip 51 and sealing groove 31 and that there is no damage to the components of opening and closing component 6 and balance component 7, hoist the hoisting box 2 to the next loading point or storage area to complete a single hoisting process.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety hoisting device for highway bridge construction, comprising a hoisting machine body (1), characterized in that: The hoisting machine body (1) is provided with a hoisting box (2) below the suspension point. The top of the hoisting box (2) is fixedly connected with a middle box plate (3). Side box plates (5) are symmetrically provided on both sides of the middle box plate (3). The front side of the hoisting box (2) is provided with an opening and closing component (6). The rear side of the hoisting box (2) is provided with a balancing component (7). The opening and closing assembly (6) includes a first mounting base (61) fixedly installed at the center of the top front side of the hoisting box (2). A pair of drive gears (62) are arranged coaxially on the top of the first mounting base (61). The drive gears (62) are provided with toothed plates (63) on both the front and rear sides. The two toothed plates (63) are respectively meshed with the two drive gears (62). An adjusting support rod (64) is fixedly installed at the ends of the two toothed plates (63) that are far apart from each other. The two adjusting support rods (64) are staggered.

2. The safety hoisting device for highway bridge construction according to claim 1, characterized in that: A hoisting assembly (4) is provided at the top center of the middle box plate (3). The hoisting box (2) is connected to the suspension point of the hoisting machine body (1) through the hoisting assembly (4) and the hook at the suspension point of the hoisting machine body (1).

3. The safety hoisting device for highway bridge construction according to claim 1, characterized in that: A servo motor (65) is fixedly connected to the bottom center of the first mounting base (61). The output end of the servo motor (65) passes through the first mounting base (61), and the output end of the servo motor (65) is fixedly connected to the center of the two drive gears (62).

4. The safety hoisting device for highway bridge construction according to claim 1, characterized in that: Both ends of the top of the side panel (5) are fixedly connected to connecting blocks (8), and the ends of the two adjusting rods (64) away from the toothed plate (63) are fixedly connected to the adjacent connecting blocks (8) in front.

5. The safety hoisting device for highway bridge construction according to claim 4, characterized in that: The balancing assembly (7) includes a second mounting base (71) fixedly installed at the center of the top of the rear side of the hoisting box (2). A support slide (72) is fixedly connected to the top of the second mounting base (71), and a pair of balancing support rods (73) are provided on the rear side of the connecting block (8) located at the rear.

6. The safety hoisting device for highway bridge construction according to claim 5, characterized in that: The two balance rods (73) are staggered and the balance rods (73) move through the support slide (72). One end of the balance rod (73) is provided with a limit baffle and the other end of the balance rod (73) is fixedly connected to the connecting block (8) located at the rear.

7. The safety hoisting device for highway bridge construction according to claim 1, characterized in that: A sealing groove (31) is provided on the side of the middle box plate (3) near the side box plate (5), and a sealing strip (51) is embedded on the side of the side box plate (5) near the middle box plate (3). The sealing strip (51) and the sealing groove (31) are positioned correspondingly and matched in specifications.

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