Foundation pit earth excavation device

Abstract

The utility model discloses a foundation pit earth excavation device, and particularly relates to the technical field of foundation pits, the foundation pit earth excavation device comprises a base, inclined plates are fixedly connected to the two sides of the top of the base, lifting plates are slidably connected to the top ends of the sides, close to each other, of the two inclined plates, and a conveying belt is arranged in the center of the top of the base; a screen is arranged on one side of the top of the conveying belt, a lifting rod is arranged on the side, away from the lifting plate, between the two inclined plates, a driven toothed rod is connected into the top end of the conveying belt, and a driving toothed rod is arranged in the bottom end of the conveying belt. A plurality of baffles are fixedly connected to the center of the outer wall of the conveying belt at equal intervals, and supporting pieces are fixedly connected to the two ends of the sides, close to the conveying belt, of the baffles; the side, close to the lifting rod, of the bottom of the lifting plate is rotationally connected with a rotating rod, and the conveying belt bypasses the outer wall of the rotating rod. The device has the advantages that earthwork transportation and screening are convenient, the conveying height is convenient to adjust, and the device is suitable for foundation pits with different depths.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit technology, specifically to a foundation pit excavation device. Background Technology

[0002] Foundation pit engineering mainly includes the design and construction of foundation pit support system and earthwork excavation. For small and medium-sized foundation pits, the common method of transporting earthwork mostly requires manual labor. In some shallow foundation pit operations, operators can easily transport the earthwork directly to the ground. However, as the depth of foundation pit excavation increases, additional transportation equipment is required to transport the earthwork.

[0003] For example, the existing patent number CN221395789U describes a foundation pit excavation device, which includes a bottom plate, a conveyor belt, and two fixed plates. The two fixed plates are rotatably connected to the conveyor belt. Two U-shaped blocks are fixedly connected to the surface of the conveyor belt at equal intervals. Two clamping plates are fixedly connected between the two fixed plates. Two electric motors are fixedly installed on the front surface of the fixed plate located in front of the two fixed plates. The output shafts of the two electric motors are fixedly connected to the rollers of the conveyor belt. An output block is set on the right side of the two fixed plates. This device solves the problems that common methods of transporting soil in small and medium-sized foundation pits often require manual labor, are too labor-intensive and cumbersome, and lack a certain screening structure for mixing sand and gravel.

[0004] The aforementioned existing technology has some drawbacks in practical use. Because the conveyor belt of this patent is directly connected to two fixed plates for mutual rotation, the length of the conveyor belt and the length of the support rod are fixed. As a result, in actual use, adjusting the conveyor belt's conveying height requires changing the conveying angle of the conveyor belt, which leads to changes in the bottom height of the conveyor belt. This affects the dumping and placement of soil by workers and affects the actual conveying effect. At the same time, the space occupied also changes with the change of the conveying angle. In actual construction, different projects require different foundation pit depths, and the depth of the foundation pit will continue to change as the excavation progresses. Therefore, this device cannot be used for foundation pits of different depths. In addition, when the device is in use, its screening structure is at the bottom of the conveyor belt, which means that the stones and other materials actually screened out are still inside the foundation pit and still need to be transported separately, creating an additional transportation burden. Utility Model Content

[0005] The purpose of this invention is to provide a foundation pit excavation device that solves the problems of existing foundation pit excavation devices being inconvenient to adjust for foundation pits of different depths and requiring additional transportation of screened sand and gravel.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a foundation pit excavation device, comprising a base, wherein inclined plates are fixedly connected to both sides of the top of the base, and a lifting plate is slidably connected to the top of the two inclined plates on the side that is close to each other, a conveyor belt is provided at the top center of the base, a screen is provided on one side of the top of the conveyor belt, a lifting rod is provided on the side away from the lifting plate between the two inclined plates, a driven toothed rod is connected inside the top of the conveyor belt, and a driving toothed rod is provided inside the bottom of the conveyor belt.

[0007] Multiple baffles are fixedly connected at equal intervals at the center of the outer wall of the conveyor belt, and support plates are fixedly connected to both ends of the baffles on the side closest to the conveyor belt.

[0008] The bottom of the lifting plate is rotatably connected to a rotating rod near the lifting rod, and the conveyor belt passes around the outer wall of the rotating rod.

[0009] Both ends of the lifting rod are rotatably connected to sliders, and rectangular holes are opened inside the two inclined plates on the side near the lifting rod. The rectangular holes and sliders are slidably connected to each other.

[0010] Preferably, an electric push rod is fixedly connected to one side of the bottom of the lifting plate, and the bottom protruding end of the electric push rod is fixedly connected to the top of the base. The tops of the two inclined plates are threaded with fixing bolts, and the side wall of the lifting plate is provided with multiple connection holes that are compatible with the fixing bolts.

[0011] Preferably, a rotating shaft is provided at the top end of the conveyor belt near the screen, and one end of the screen is rotatably connected to the lifting plate via the rotating shaft.

[0012] Preferably, an electric adjusting push rod is rotatably connected to the center of both sides of the screen, and the bottom protruding end of the electric adjusting push rod is rotatably connected to one side of the lifting plate.

[0013] Preferably, the conveyor belt passes around the outer wall of the lifting rod, and a lead screw is installed through the inside of the rectangular hole. The outer wall of the lead screw near the top is rotatably connected to the inside of the inclined plate through a bearing. The outer wall of the lead screw passes through the slider and is threadedly connected to the slider.

[0014] Preferably, the inner wall of the conveyor belt is provided with toothed grooves at equal intervals, and the inner wall of the conveyor belt is connected to the outer wall of the driven toothed rod and the driving toothed rod respectively through the toothed grooves. A motor is installed at one end of the driving toothed rod, and the baffle is made of elastic rubber plate.

[0015] Preferably, a support plate is slidably connected to the inside of the conveyor belt near the lifting plate, and the two ends of the support plate are provided with mounting holes corresponding to the connecting holes. The support plate is threadedly connected to the fixing bolts through the mounting holes, and the lifting plate can be fixedly connected to the fixing bolts through the connecting holes.

[0016] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0017] 1. Activate the electric adjusting push rod, which will drive the screen to rotate to the top of the conveyor belt. This allows the soil transported to the top of the conveyor belt to reach the top of the screen, where it can effectively separate the soil from larger sand and gravel structures. This also allows both soil and sand to be transported out of the foundation pit without additional transportation. When screening is not needed, the electric adjusting push rod can be retracted, and the screen will rotate to the lifting plate side, thus avoiding contact between the screen and the soil, facilitating the transportation and screening of the soil.

[0018] 2. The lifting rod moves to the bottom, releasing the tension on the conveyor belt and allowing it to slack off. This makes it easy to activate the electric push rod, which then moves the lifting plate synchronously to the top. This causes the driven rack to move to the top, pulling the conveyor belt upwards, thus raising the conveyor belt. When the conveyor belt needs to descend, the electric push rod retracts, slackening the conveyor belt. The screw then rotates in the opposite direction, moving the slider to the top, which in turn moves the lifting rod to the top, connecting the conveyor belt and the lifting rod. This effectively achieves the lifting and lowering of the conveyor belt without requiring adjustment of the conveyor belt angle, making it suitable for excavation work at different depths. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a front view of the present invention;

[0022] Figure 3 This is a side view of the internal structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the external connection structure of the conveyor belt of this utility model;

[0024] Figure 5 This is a schematic diagram of the side connection structure of the lifting plate of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Base; 101. Inclined plate; 102. Rectangular hole; 2. Lifting plate; 201. Electric push rod; 202. Connecting hole; 203. Fixing bolt; 204. Support plate; 3. Conveyor belt; 301. Baffle; 302. Support plate; 4. Screen; 401. Electric adjusting push rod; 5. Lifting rod; 501. Slider; 502. Lead screw; 6. Driven rack; 601. Rotating shaft; 602. Rotating rod; 7. Drive rack. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] This utility model provides, for example Figure 1-5 The excavation device for foundation pits shown includes a base 1. Inclined plates 101 are fixedly connected to both sides of the top of the base 1. Lifting plates 2 are slidably connected to the top of the two inclined plates 101 on their respective sides. A conveyor belt 3 is provided at the center of the top of the base 1. A screen 4 is provided on one side of the top of the conveyor belt 3. A lifting rod 5 is provided between the two inclined plates 101 on the side away from the lifting plate 2. A driven toothed rod 6 is connected inside the top of the conveyor belt 3, and a driving toothed rod 7 is provided inside the bottom of the conveyor belt 3. Multiple baffles 301 are fixedly connected at equal intervals at the center of the outer wall of the conveyor belt 3. Support plates 302 are fixedly connected to both ends of the baffles 301 on the side of the baffles 3 closest to the conveyor belt 3. A rotating rod 602 is rotatably connected to the bottom of the lifting plate 2 on the side close to the lifting rod 5. The outer wall of the conveyor belt 3 passes around the outer wall of the rotating rod 602. A slider 501 is rotatably connected to both ends of the lifting rod 5. A rectangular hole 102 is opened inside the two inclined plates 101 on the side close to the lifting rod 5. The rectangular hole 102 and the slider 501 are slidably connected to each other.

[0029] Activating the electric adjusting push rod 401 causes the screen 4 to rotate to the top of the conveyor belt 3, allowing the soil dumped on the top of the conveyor belt 3 to reach the top of the screen 4. The screen 4 effectively separates loose soil from large pieces of sand and gravel, and also allows both soil and gravel to be transported out of the pit without additional transport. The lifting rod 5 moves to the bottom, releasing the tension on the conveyor belt 3 and slackening it. At this point, the electric push rod 201 can be easily activated, causing the lifting plate 2 to move synchronously to the top. This causes the driven toothed rod 6 to move to the top, which in turn pulls the conveyor belt 3 to the top, thus adjusting the height of the conveyor belt 3.

[0030] like Figure 3 , Figure 5As shown, an electric push rod 201 is fixedly connected to one side of the bottom of the lifting plate 2, and the bottom protruding end of the electric push rod 201 is fixedly connected to the top of the base 1. The tops of the two inclined plates 101 are threaded with fixing bolts 203. The side wall of the lifting plate 2 has multiple connecting holes 202 that are compatible with the fixing bolts 203. Removing the installation of the fixing bolts 203 releases the fixing between the lifting plate 2 and the inclined plate 101, making it convenient to adjust the raising and lowering of the lifting plate 2. Removing the installation of the fixing bolts 203 releases the fixing of the support plate 204. Then, different support plates 204 can be replaced as needed, and the fixing bolts 203 can be reconnected to the support plate 204 through the connecting holes 202.

[0031] like Figure 3 , Figure 5 As shown, a rotating shaft 601 is provided at the top of the conveyor belt 3 near the screen 4. One end of the screen 4 is rotatably connected to the lifting plate 2 via the rotating shaft 601. Electric adjusting push rods 401 are rotatably connected to the center of both sides of the screen 4. The bottom extension of the electric adjusting push rod 401 is rotatably connected to one side of the lifting plate 2. The driven toothed rod 6 moves to the top, thereby pulling the conveyor belt 3 to the top, thus realizing the upward movement of the conveyor belt 3. When the conveyor belt 3 needs to descend, the electric push rod 201 can be retracted. The lifting plate 2 moves to the bottom, causing the driven toothed rod 6 to move to the bottom, thereby causing the driven toothed rod 6 to loosen the conveyor belt 3. The electric adjusting push rod 401 is activated, thereby driving the screen 4 to rotate to the top side of the conveyor belt 3. This allows the soil transported by the conveyor belt 3 to reach the top of the screen 4. The screen 4 can effectively separate the soil and sand structure, and also allows the soil and sand to be transported out of the foundation pit without additional transportation.

[0032] like Figure 5 As shown, the conveyor belt 3 passes around the outer wall of the lifting rod 5. A lead screw 502 is installed inside the rectangular hole 102. The outer wall of the lead screw 502 near the top is rotatably connected to the inside of the inclined plate 101 via a bearing. The outer wall of the lead screw 502 passes through the slider 501 and is threadedly connected to the slider 501. Rotating the lead screw 502 causes the slider 501 to slide along the rectangular hole 102, thereby causing the lifting rod 5 to move to the bottom, thus releasing the tension on the conveyor belt 3 and making the conveyor belt 3 slack. Reverse rotation of the lead screw 502 causes the slider 501 to move to the top, which in turn causes the lifting rod 5 to move to the top, thereby pulling the conveyor belt 3 and preventing insufficient tension of the conveyor belt 3 from affecting transportation.

[0033] like Figure 3 , Figure 4As shown, the inner wall of the conveyor belt 3 is provided with toothed grooves at equal intervals. The inner wall of the conveyor belt 3 is connected to the outer wall of the driven toothed rod 6 and the driving toothed rod 7 respectively through the toothed grooves. A motor is installed at one end of the driving toothed rod 7. The baffle 301 is made of flexible rubber. A support plate 204 is slidably connected to the side of the conveyor belt 3 near the lifting plate 2. The two ends of the support plate 204 are provided with mounting holes corresponding to the connecting holes 202. The support plate 204 is threadedly connected to the fixing bolts 203 through the mounting holes.

[0034] In use, this invention allows for convenient dumping of soil onto the side of the baffle 301 near the conveyor belt 3. The motor is then started to rotate the drive rack 7, causing the conveyor belt 3 to rotate and move the baffle 301 upwards, thus conveying the soil to the top of the conveyor belt 3. Simultaneously, the electric adjusting push rod 401 can be easily activated, extending to rotate the screen 4 around the shaft to the top of the conveyor belt 3. This ensures that the dumped soil reaches the top of the screen 4, effectively separating loose soil from large pieces of sand and gravel. Both soil and gravel are then transported out of the pit without additional transport. When screening is not needed, the electric adjusting push rod 401 can be retracted, rotating the screen 4 towards the lifting plate 2 to prevent contact between the screen 4 and the soil, allowing the soil to fall directly through the top of the conveyor belt 3, facilitating both transport and screening.

[0035] When working on foundation pits at different heights, to easily remove the fixing bolts 203, it is necessary to release the fixing between the lifting plate 2 and the inclined plate 101, and release the fixing to the support plate 204. Then, the screw 502 can be rotated to drive the slider 501 to slide along the rectangular hole 102, thereby moving the lifting rod 5 to the bottom and releasing the pull on the conveyor belt 3. This allows the conveyor belt 3 to loosen, making it easy to activate the electric push rod 201. The electric push rod 201 then moves the lifting plate 2 synchronously to the top, causing the driven rack 6 to move to the top. The driven rack 6 then pulls the conveyor belt 3 to the top, thus raising the conveyor belt 3 and facilitating the raising of the baffle 301 to a higher position, thereby achieving the conveying of earth. When conveyor belt 3 needs to be lowered, the electric push rod 201 retracts, and the lifting plate 2 moves to the bottom, causing the driven toothed rod 6 to move to the bottom, thus loosening the conveyor belt 3. Then, the screw 502 rotates in the opposite direction, driving the slider 501 to move to the top, which in turn drives the lifting rod 5 to move to the top, thereby pulling the conveyor belt 3 and causing it to move to the bottom to re-engage with the driven toothed rod 6, preventing the conveyor belt 3 from loosening. This effectively achieves the lifting and lowering movement of the conveyor belt 3 without the need to adjust the angle of the conveyor belt 3. By changing the support plate 204 of different lengths according to the change in the distance between the driving toothed rod 7 and the driven toothed rod 6, and reconnecting the fixing bolt 203 through the connecting hole 202 to the support plate 204, it can be used for excavation operations of different depths of foundation pits.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A foundation pit excavation device, comprising a base (1), characterized in that: The base (1) has inclined plates (101) fixedly connected to both sides of the top. The top of the two inclined plates (101) are slidably connected to the top of the side that is close to each other. A conveyor belt (3) is provided at the top center of the base (1). A screen (4) is provided on one side of the top of the conveyor belt (3). A lifting rod (5) is provided between the two inclined plates (101) on the side away from the lifting plate (2). A driven toothed rod (6) is connected inside the top of the conveyor belt (3). A driving toothed rod (7) is provided inside the bottom of the conveyor belt (3). Multiple baffles (301) are fixedly connected at equal intervals at the center of the outer wall of the conveyor belt (3), and support plates (302) are fixedly connected at both ends of the side of the baffle (301) closest to the conveyor belt (3). The bottom of the lifting plate (2) is rotatably connected to a rotating rod (602) near the lifting rod (5), and the outer wall of the conveyor belt (3) passes around the outer wall of the rotating rod (602); Both ends of the lifting rod (5) are rotatably connected to sliders (501). The two inclined plates (101) have rectangular holes (102) inside on the side near the lifting rod (5). The rectangular holes (102) and sliders (501) are slidably connected to each other.

2. The foundation pit excavation device according to claim 1, characterized in that: An electric push rod (201) is fixedly connected to one side of the bottom of the lifting plate (2), and the bottom extension end of the electric push rod (201) is fixedly connected to the top of the base (1). The tops of the two inclined plates (101) are threaded with fixing bolts (203), and the side wall of the lifting plate (2) is provided with multiple connection holes (202) that are compatible with the fixing bolts (203).

3. The foundation pit excavation device according to claim 1, characterized in that: The top of the conveyor belt (3) is provided with a rotating shaft (601) near the screen (4), and one end of the screen (4) is connected to the lifting plate (2) by rotating shaft (601).

4. The foundation pit excavation device according to claim 1, characterized in that: Electric adjustment push rods (401) are rotatably connected to the center of both sides of the screen (4), and the bottom protruding end of the electric adjustment push rods (401) is rotatably connected to one side of the lifting plate (2).

5. The foundation pit excavation device according to claim 1, characterized in that: The conveyor belt (3) passes around the outer wall of the lifting rod (5), and a lead screw (502) is installed inside the rectangular hole (102). The outer wall of the lead screw (502) near the top is rotatably connected to the inside of the inclined plate (101) through a bearing. The outer wall of the lead screw (502) passes through the slider (501) and is threadedly connected to the slider (501).

6. The foundation pit excavation device according to claim 1, characterized in that: The inner wall of the conveyor belt (3) is provided with toothed grooves at equal intervals. The inner wall of the conveyor belt (3) is connected to the outer wall of the driven toothed rod (6) and the driving toothed rod (7) respectively through the toothed grooves. A motor is installed at one end of the driving toothed rod (7).

7. The foundation pit excavation device according to claim 2, characterized in that: The conveyor belt (3) has a support plate (204) slidably connected to the side of the lifting plate (2) inside, and the two ends of the support plate (204) are provided with mounting holes corresponding to the connecting holes (202). The support plate (204) is threadedly connected to the fixing bolts (203) through the mounting holes.

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