Sandstone screening device for engineering construction

Abstract

The utility model discloses a sandstone screening device of engineering construction, include: support, belt roller, pretreatment box, vibrating screen body, the inside installation of support has the belt roller, the right side end of belt roller extends to the inside of pretreatment box, the connecting surface of pretreatment box and belt roller is opened to have the pass -through, the top of pass -through is installed with the bag opening mechanism, the utility model provides a sandstone screening device of engineering construction solves the prior art device before vibrating screen work, for the early stage processing of sandstone is through manual handheld shovel body and is lifted sandstone, and is put into vibrating screen inside, this mode will not only make the labor intensity of manual increase, in the operation process, the dust in the sandstone that is raised can be scattered in the work area, causes the pollution of work area, is not favorable to actual operation use.

Description

Technical Field

[0001] This utility model relates to the technical field of sand and gravel processing equipment, and in particular to a sand and gravel screening device for engineering construction. Background Technology

[0002] In engineering construction, sand and gravel of different particle sizes have different uses. For example, in concrete mixing, sand and gravel within a specific particle size range are needed to ensure the workability, strength, and other properties of the concrete. Sand and gravel screening devices can classify sand and gravel according to particle size, removing excessively large or small particles that do not meet the requirements. This ensures the stable quality of sand and gravel materials used in engineering construction, thereby guaranteeing the quality of the entire engineering structure. Unscreened sand and gravel may contain impurities and particles that do not meet the size requirements. If such sand and gravel are used directly during construction, it may lead to problems such as equipment blockage and slow construction progress. Screened sand and gravel can better adapt to the feeding requirements of various construction equipment, such as concrete mixers and asphalt pavers, making the construction process smoother, improving construction efficiency, and promoting the rational use of resources: the screening device can fully filter out the usable portion of the sand and gravel raw materials. Sand and gravel that do not meet the current project requirements can be further processed or used in other suitable engineering scenarios. This avoids resource waste, achieves the rational classification and utilization of sand and gravel resources, and reduces engineering construction costs.

[0003] Vibrating screens are a common type of sand and gravel screening device. They mainly consist of a screen box, vibrator, screen mesh, and support device. When the vibrator is working, it generates a periodic excitation force. This excitation force causes the screen box to move the sand and gravel on the screen mesh in a reciprocating motion. Due to the different sizes, shapes, and weights of the sand and gravel particles, their movement trajectories on the screen mesh and their ability to pass through the screen mesh are also different. Smaller particles can fall through the mesh and become undersize material, while larger particles remain on the screen mesh and move forward continuously with the vibration of the screen box, eventually being discharged from the other end of the screen.

[0004] The vibrating screen mentioned above is a common operating component. However, before the vibrating screen is in operation, the pre-treatment of sand and gravel is often done by manually scooping up the sand and gravel with a hand shovel and putting it into the vibrating screen. This method not only increases the labor intensity of the workers, but also causes the dust in the sand and gravel to be scattered in the working area during operation, which will cause pollution to the working area and is not conducive to actual operation.

[0005] Therefore, it is necessary to provide a sand and gravel screening device for engineering construction to solve the above-mentioned technical problems. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the existing technology, this utility model provides a sand and gravel screening device for engineering construction. The existing device often requires manual handling of sand and gravel before the vibrating screen is in operation. This method not only increases the labor intensity of the workers, but also causes dust from the sand and gravel to be scattered in the working area during operation, which is not conducive to actual operation.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A sand and gravel screening device for engineering construction includes: a support frame, belt rollers, a pretreatment box, and a vibrating screen body;

[0009] The bracket is equipped with a belt roller, the right end of which extends into the pretreatment box. An opening is provided at the connection surface between the pretreatment box and the belt roller, and a bag opening mechanism is installed above the opening.

[0010] In one embodiment, the bag opening mechanism comprises a mounting plate, an electric push rod, a mounting frame, and a blade. The electric push rod is mounted on the bottom of the mounting plate, and the mounting frame is mounted on the bottom of the electric push rod. Blades are installed at intervals on the bottom surface of the mounting frame. The blade has a double-edged structure with a pointed blade at its bottom.

[0011] In one embodiment, a top cover is bolted to the top of the pretreatment box, and an exhaust pipe is installed in the center of the top surface of the top cover, which is connected to an external fan.

[0012] In one embodiment, the bottom of the pretreatment box is connected to the feed inlet of the vibrating screen body, a receiving plate is installed on the inner bottom surface of the pretreatment box, the receiving plate has several rectangular openings, and a door is installed on the right side of the pretreatment box on the receiving plate.

[0013] In one embodiment, a rubber baffle is installed on the top surface of the opening at the connection between the pretreatment box and the belt roller, and the bottom surface of the opening is sealed to the bottom surface of the support frame.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) This utility model puts bagged sand and gravel into a belt roller, which then transports the bag to the pretreatment box. By reducing the conveying speed of the belt roller, after the bag enters the pretreatment box, the electric push rod is activated to drive the blade to move down, so that the bottom edge of the blade is inserted into the bag. The side edge opens the bag as the bag moves, allowing the sand and gravel inside to be discharged. There is no need for manual supply of sand and gravel, which reduces the labor intensity of manual labor. By activating the external fan, the exhaust pipe is used to suck up the dust generated after the bag has been opened, thereby improving the cleanliness of the overall working environment.

[0016] (2) In this utility model, during the falling process of sand and gravel, some large stones are blocked by the receiving plate, while the sand and gravel that meet the requirements enter the vibrating screen body through the rectangular opening of the receiving plate for more detailed screening. After the bags are opened, they fall onto the top surface of the receiving plate as the belt roller moves. After several bag openings, the door is manually opened to clean the debris on the receiving plate. The cleaning is done during the operation interval between the two bags and can be completed using only a hook rod. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a detailed view of the disassembled components of this utility model;

[0019] Figure 3 This is a detailed diagram of the internal structure of the pretreatment box of this utility model;

[0020] Figure 4 This is a detailed drawing of the bag-opening mechanism of this utility model.

[0021] The corresponding names of the attached figures are: bracket 1, belt roller 2, pretreatment box 3, top cover 31, exhaust pipe 32, receiving plate 33, door 34, vibrating screen body 4, bag opening mechanism 5, mounting plate 51, electric push rod 52, mounting frame 53, and blade body 54. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0023] like Figures 1-2 As shown, the present invention provides a sand and gravel screening device for engineering construction, comprising: a support frame 1, a belt roller 2, a pretreatment box 3, and a vibrating screen body 4;

[0024] like Figure 1-3As shown, a belt roller 2 is installed inside the bracket 1. The right end of the belt roller 2 extends into the pretreatment box 3. An opening is provided at the connection surface between the pretreatment box 3 and the belt roller 2. A bag opening mechanism 5 is installed above the opening. During operation, bags of sand and gravel are put into the belt roller 2 and transported to the pretreatment box 3. Since the right side of the belt roller 2 is inside the pretreatment box 3, the bag opening mechanism 5 is activated in advance when the sand and gravel bag enters the pretreatment box 3 to open the sand and gravel bag and allow the sand and gravel inside to fall out. There is no need for manual supply of sand and gravel, which reduces the labor intensity of manual labor.

[0025] Preferably, in one embodiment, such as Figure 4 As shown, the bag opening mechanism 5 consists of a mounting plate 51, an electric push rod 52, a mounting frame 53, and a blade body 54. The electric push rod 52 is mounted on the bottom of the mounting plate 51, and the mounting frame 53 is mounted on the bottom of the electric push rod 52. Blades 54 are installed at intervals on the bottom surface of the mounting frame 53. The blade body 54 has a double-edged structure with a pointed blade at the bottom. During operation, by reducing the conveying speed of the belt roller 2, after the bag enters the pretreatment box 3, the electric push rod 52 is activated to drive the blade body 54 downward, so that the bottom blade of the blade body 54 inserts into the bag, while the side blade opens the bag as it moves, allowing the sand and gravel inside to be discharged.

[0026] Preferably, in one embodiment, such as Figure 2 As shown, the top of the pretreatment box 3 is bolted with a top cover 31. An exhaust pipe 32 is installed in the middle of the top surface of the top cover 31. The exhaust pipe 32 is connected to an external fan. During operation, by starting the external fan, the exhaust pipe 32 is used to suck up the dust generated after the bag has been opened, thereby improving the cleanliness of the overall working environment.

[0027] Preferably, in one embodiment, such as Figures 2-3 As shown, the bottom of the pretreatment box 3 is connected to the feed inlet of the vibrating screen body 4. A receiving plate 33 is installed on the inner bottom surface of the pretreatment box 3. The receiving plate 33 has several rectangular openings. A door 34 is installed on the right side of the receiving plate 33. During operation, some large stones are blocked by the receiving plate 33 during the falling process of sand and gravel, while the sand and gravel that meet the requirements enter the vibrating screen body 4 through the rectangular openings of the receiving plate 33 for more detailed screening. After the bags are opened, they fall onto the top surface of the receiving plate 33 as the belt roller 2 moves. After several bag openings, the door 34 is manually opened to clean the debris on the receiving plate 33. The cleaning is done during the interval between the operation of the two bags and can be completed using only a hook rod.

[0028] Preferably, in one embodiment, a rubber baffle is installed on the top surface of the opening at the connection between the pretreatment box 3 and the belt roller 2, and the bottom surface of the opening is sealed to the bottom surface of the support frame 1. The rubber baffle can prevent some dust from leaking out.

[0029] Working principle of this utility model:

[0030] During operation, bags of sand and gravel are fed into belt roller 2 and transported to the pretreatment box 3. Since the right side of belt roller 2 is inside the pretreatment box 3, the bag opening mechanism 5 is activated in advance when the sand and gravel bags enter the pretreatment box 3 to open the bags and allow the sand and gravel inside to fall out. This eliminates the need for manual feeding of sand and gravel, reducing the labor intensity. During the fall, some large stones are blocked by the receiving plate 33, while the sand and gravel that meet the requirements enter the vibrating screen body 4 through the rectangular opening of the receiving plate 33 for more detailed screening. After the bags are opened, they fall onto the top surface of the receiving plate 33 as the belt roller 2 moves. After several bag openings, the door 34 is manually opened to clean the debris on the receiving plate 33. The cleaning is done during the interval between the operation of the two bags and can be completed using only a hook rod.

[0031] The above embodiments are merely one of the preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications or refinements made to the main design concept and spirit of this utility model that are not of substantial significance, but solve the same technical problem as this utility model, should be included within the scope of protection of this utility model.

Claims

1. A sand and gravel screening device for engineering construction, characterized in that, include: Support frame, belt rollers, pretreatment box, vibrating screen body; The bracket is equipped with a belt roller, the right end of which extends into the pretreatment box. An opening is provided at the connection surface between the pretreatment box and the belt roller, and a bag opening mechanism is installed above the opening.

2. The sand and gravel screening device for engineering construction according to claim 1, characterized in that, The bag opening mechanism consists of a mounting plate, an electric push rod, a mounting frame, and a blade. The electric push rod is mounted on the bottom of the mounting plate, and the mounting frame is mounted on the bottom of the electric push rod. Blades are installed at intervals on the bottom surface of the mounting frame. The blade has a double-edged structure with a pointed blade at the bottom.

3. The sand and gravel screening device for engineering construction according to claim 1, characterized in that, The top of the pretreatment box is bolted to a top cover, and an exhaust pipe is installed in the middle of the top surface of the top cover. The exhaust pipe is connected to an external fan.

4. The sand and gravel screening device for engineering construction according to claim 3, characterized in that, The bottom of the pretreatment box is connected to the feed inlet of the vibrating screen body. A receiving plate is installed on the inner bottom surface of the pretreatment box. The receiving plate has several rectangular openings. A door is installed on the right side of the receiving plate.

5. The sand and gravel screening device for engineering construction according to claim 4, characterized in that, A rubber baffle is installed on the top surface of the opening at the connection between the pretreatment box and the belt roller, and the bottom surface of the opening is sealed to the bottom surface of the support frame.

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