A surveying device for excavation of earthwork foundation pits for construction.

Abstract

This utility model relates to the field of building construction, and more particularly to a surveying device for excavating foundation pits for construction. It includes a trolley with a gripping frame mounted on it. Two support plates are mounted on the upper side of the trolley, each with an arc-shaped support component. A winding assembly is rotatably mounted between the arc-shaped support components. The connecting wire of the winding assembly moves downwards, parallel to the support plates. A counterweight detection head is connected to the lower end of the connecting wire. A conductor structure is mounted on the right side of the trolley, with the connecting wire slidably connected to it. A counterweight mechanism is rotatably mounted on the trolley. This utility model, by integrating a conductor mechanism with a cross-shaped ring guide structure, forcibly constrains the vertical movement path of the connecting wire, ensuring the absolute vertical accuracy of the foundation pit depth data. The counterweight mechanism adopts a rotatable and detachable modular design, and the counterweight block is quickly locked by a sliding mounting frame, significantly enhancing the trolley's anti-overturning ability and adapting to diverse working conditions.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and in particular to a surveying device for excavating earthwork foundation pits for construction. Background Technology

[0002] In the measurement of foundation pit depth in construction engineering, traditional methods often rely on manual operation using tape measures or laser rangefinders. Tape measurements are easily affected by the tilt of the foundation pit wall, resulting in vertical data deviations. Moreover, they require multiple people to work together, which is inefficient. Although laser rangefinders have higher accuracy, they are limited by power supply dependence, ambient light, and dust interference, and their stability is insufficient in complex construction scenarios. In addition, conventional trolley-type measuring devices lack targeted counterweight balance design, and are prone to overturning on soft or uneven foundations due to the lowering of measuring components (such as probes) or external forces, affecting measurement safety and data reliability. In existing technologies, the counterweight mechanism is usually fixed in installation mode, which cannot flexibly adjust the counterweight according to the working conditions, nor can it be quickly stored. Long-term use can easily cause deformation of the vehicle body structure or damage to the connecting parts.

[0003] Therefore, in order to address the above problems, a construction earthwork foundation pit excavation and measurement device is now being developed. Utility Model Content

[0004] In order to overcome the shortcomings of existing devices, which are usually fixed in installation mode, cannot flexibly adjust the counterweight according to the working conditions, are difficult to store quickly, and are prone to deformation of the vehicle body structure or damage to the connecting parts after long-term use, this utility model provides a construction earthwork foundation pit excavation and measurement device.

[0005] The technical solution of this utility model is as follows:

[0006] A surveying device for excavating foundation pits for construction includes a trolley with a gripping frame. Two support plates are mounted on the upper side of the trolley, each with an arc-shaped support member. A winding assembly is rotatably mounted between the arc-shaped support members. The connecting wire of the winding assembly moves downwards, parallel to the support plates. A counterweight detection head is connected to the lower end of the connecting wire. A wire structure is installed on the right side of the trolley, and the connecting wire is slidably connected to the wire structure. A counterweight mechanism is rotatably mounted on the trolley.

[0007] Optionally, the counterweight mechanism includes a first mounting frame, which is rotatably connected to the left side of the trolley. A second mounting frame is slidably connected to the first mounting frame. A counterweight is placed inside the first mounting frame and is locked by the second mounting frame. Two symmetrically positioned limiting frames are connected to the left side of the trolley. Each limiting frame is slidably and rotatably connected to a latch. The latch is used to lock and compress the left side of the first mounting frame. A first spring is connected between the latch and the limiting frame.

[0008] Optionally, it also includes a buffer mechanism, which includes a mounting cylinder. Multiple mounting cylinders are provided on the left side of the first mounting frame. Each mounting cylinder is equipped with a damper. A contact plate is provided between the dampers. A second spring is connected between the contact plate and the mounting cylinder. The contact plate, damper, and second spring cooperate to provide buffer support for the first mounting frame after it is flipped downward.

[0009] Optionally, a protective frame is installed on the outside of the winding assembly.

[0010] Optionally, the conductor structure has a cross-shaped ring guide structure in the middle.

[0011] Optionally, the first mounting frame and the second mounting frame are connected by a detachable structure.

[0012] By adopting the above technical solution, this utility model has the following advantages:

[0013] This invention integrates a wire guide mechanism with a cross-shaped ring structure to forcibly constrain the vertical movement path of the connecting line, ensuring the absolute vertical accuracy of the pit depth data. The counterweight mechanism adopts a rotatable and detachable modular design, and the counterweight block is quickly locked by a sliding mounting frame, which significantly enhances the trolley's anti-overturning ability and adapts to diverse working conditions. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the present invention.

[0016] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the counterweight mechanism of this utility model.

[0017] Figure 4 This is a partial exploded cross-sectional three-dimensional structural diagram of the counterweight mechanism of this utility model.

[0018] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the buffer mechanism of this utility model.

[0019] The meanings of the reference numerals in the figure are as follows: 1: trolley, 11: support plate, 2: winding assembly, 3: counterweight detection head, 4: wire structure, 5: counterweight mechanism, 51: first mounting frame, 52: second mounting frame, 53: counterweight block, 54: limit frame, 55: bolt, 56: first spring, 6: buffer mechanism, 61: mounting cylinder, 62: contact plate, 63: damper, 64: second spring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0021] A surveying device for excavating foundation pits during construction, such as Figures 1-5 As shown, the device includes a trolley 1 with a grip frame mounted on it. Two support plates 11 are mounted on the upper side of the trolley 1, each with an arc-shaped support member. A winding assembly 2 is rotatably mounted between the arc-shaped support members. A protective frame is mounted on the outside of the winding assembly 2. The connecting wire of the winding assembly 2 moves downwards, parallel to the support plates 11. A counterweight detection head 3 is connected to the lower end of the connecting wire of the winding assembly 2. A wire structure 4 is mounted on the right side of the trolley 1. The wire structure 4 has a cross-shaped ring guide structure in the middle, and the connecting wire is slidably connected to the wire structure 4. A counterweight mechanism 5 is rotatably mounted on the trolley 1. The counterweight mechanism 5 includes... The first mounting frame 51 is rotatably connected to the left side of the trolley 1. The second mounting frame 52 is slidably connected to the first mounting frame 51. The first mounting frame 51 and the second mounting frame 52 are detachable. A counterweight 53 is placed inside the first mounting frame 51. The counterweight 53 is limited and locked by the second mounting frame 52. Two symmetrical limiting frames 54 are connected to the left side of the trolley 1. Each limiting frame 54 is slidably and rotatably connected to a latch 55. The latch 55 is used to lock and compress the left side of the first mounting frame 51. A first spring 56 is connected between the latch 55 and the limiting frame 54.

[0022] It also includes a buffer mechanism 6, which includes a mounting cylinder 61. Multiple mounting cylinders 61 are provided on the left side of the first mounting frame 51. A damper 63 is installed in each mounting cylinder 61. A contact plate 62 is provided between the dampers 63. A second spring 64 is connected between the contact plate 62 and the mounting cylinder 61. The contact plate 62, the damper 63 and the second spring 64 cooperate to provide buffer support for the first mounting frame 51 after it is flipped downward.

[0023] It should be noted that the device uses a mobile trolley 1 as its support base, which integrates a measurement system and a counterweight stabilization mechanism. During operation, the trolley 1 is first moved to the edge of the pit to be measured to ensure that it is parked stably. The operator can move and position the trolley 1 by holding the frame. The measurement work begins with the winding assembly 2, whose shaft is supported by two support plates 11 symmetrically arranged on the upper side of the trolley 1 and corresponding arc-shaped support members on the support plates 11. The arc-shaped support members ensure the smooth and stable rotation of the shaft, while the outer protective frame provides physical protection to prevent the shaft from being damaged by bumps or debris during transportation or operation.

[0024] When measurement is required, the operator releases the brake on the winding assembly 2. The connecting wire wound on the winding assembly 2 will be released freely downwards under the gravity of the counterweight detection head 3 suspended at its lower end. The downward movement path of the connecting wire is strictly constrained by the wire structure 4 installed on the right side of the trolley 1. The core of this wire structure 4 is a delicate cross-shaped ring guide structure (which can be understood as consisting of four mutually perpendicular arc-shaped guide rings). The connecting wire passes through this cross-shaped ring guide structure and forms a sliding connection with it. The key function of the cross-shaped ring structure is to forcibly guide the vertical state of the connecting wire, overcoming the deviation of the starting angle of the winding assembly 2 and the possible deviation of the counterweight detection head 3. Slight swaying or tilting of the trolley 1 can cause the connecting line to fall in a non-vertical state. This ensures the absolute perpendicularity of the measuring baseline, i.e., the connecting line, in the direction of gravity. At the same time, the cross ring structure also constrains the trajectory of the connecting line and prevents it from shaking or tangling excessively. The counterweight detection head 3 continues to sink under the action of gravity until its bottom touches the bottom of the pit (or the set measurement reference point) before it stops falling. At this time, the connecting line stops releasing, and the operator locks the braking device of the winding assembly 2. By measuring the length of the connecting line from the exit point of the cross ring guide structure to the top of the counterweight detection head 3 (the equipment needs to be set with the corresponding reference point), the actual depth of the pit can be accurately obtained.

[0025] To ensure the stability of the entire measurement process and the accuracy of the measurement results, especially to overcome the risk of tipping over on non-ideal ground (such as soft or uneven ground) or due to changes in the center of gravity caused by the falling of the counterweight detection head 3, the device is specially designed with a counterweight mechanism 5 and a buffer mechanism 6. The counterweight mechanism 5 is located on the left side of the cart 1 (the operator usually stands on the right rear of the cart 1 to operate the grip and winding assembly 2, where the center of gravity is prone to tilting to the right). It is rotatably connected to the cart 1 body and is composed of a first mounting frame 51 forming the main frame. A second mounting frame 52 that can slide along the top of the first mounting frame 51 is designed, and the first mounting frame 51 and the second mounting frame 52 are connected to the first mounting frame 1. The second mounting frames 52 can be connected by a convenient detachable structure (pin structure). When in use, the counterweight 53 is placed in the inner cavity of the first mounting frame 51, and then the second mounting frame 52 is slid down along the slide to the position. At this time, the second mounting frame 52 acts as a limit locking plate to cover the top of the counterweight 53 and lock it in place, preventing the counterweight 53 from coming out when the device moves or flips. After the second mounting frame 52 is installed in place, the entire counterweight mechanism 5 remains as one unit. At this time, the latches 55 on the left and right limit frames 54 are pulled out, and then rotated at a certain angle so that the locking part no longer locks the left side of the first mounting frame 51.

[0026] Afterwards, the operator can rotate the counterweight mechanism 5 to the lower left around its axis to a horizontal (or near-horizontal) working position. The weight of the counterweight block 53 can be flexibly selected and increased or decreased according to the actual working conditions (weight of trolley 1 and accessories, weight of counterweight detection head 3, degree of soil softness, expected safety factor, etc.). When the measurement task is completed and the equipment needs to be stored, the operator needs to overcome the pulling force of the first spring 56 again to pull out the latch 55 and rotate it to the unlocked position. Then, the counterweight mechanism 5 (first mounting frame 51) can be lifted to the upper right around its axis and rotated back to a vertical storage position near the side wall of trolley 1 to reduce volume and facilitate transportation. As a supporting functional component of the counterweight mechanism 5, the buffer mechanism 6 is provided with Designed to protect the structure of the counterweight mechanism 5 and the trolley 1, the buffer mechanism 6 mainly functions during the process of the counterweight mechanism 5 (carrying heavy objects) flipping downward from the storage position to the working position. The buffer mechanism 6 is installed on the left side (the side facing the ground) of the first mounting frame 51. It consists of multiple mounting cylinders 61 arranged along the length direction. Each mounting cylinder 61 has a built-in damper 63. The piston rod end of the damper 63 is connected to a common, large-area contact plate 62. A second spring 64 is installed between the contact plate 62 and each mounting cylinder 61. Under normal conditions (when the counterweight mechanism 5 is retracted), the contact plate 62 maintains a certain distance from the bottom of the mounting cylinder 61 under the elastic force of the second spring 64.

[0027] As the operator slowly lowers the heavy counterweight mechanism 5 (first mounting frame 51) loaded with counterweight 53 from its vertical storage position to its horizontal working position, as the first mounting frame 51 approaches horizontality, its left contact plate 62 will be the first to contact the ground. Once the contact plate 62 touches the ground, the remaining kinetic energy and gravitational potential energy of the counterweight mechanism 5 (along with the heavy counterweight 53) will be mainly dissipated through the buffer mechanism 6. First, the second spring 64 will be further compressed upon impact, using its elastic deformation to absorb most of the impact energy. At the same time, the piston rod of the built-in damper 63 is pressed into the cylinder at a relatively high speed, and the damper in the cylinder... The damping medium generates strong flow resistance, irreversibly converting the remaining kinetic energy into heat energy, producing a very effective buffering effect. The large-area design of the contact plate 62 helps to disperse the impact force to a larger surface area, avoiding local sinking or violent impact that could damage the ground or the mechanism itself. Under the combined buffering effect of the damper 63 and the second spring 64, the counterweight mechanism 5 can land smoothly and slowly, preventing the rigid collision between the first mounting frame 51 and the ground (especially uneven ground), and preventing the trolley 1 body and the connecting hinge of the counterweight mechanism 5 from bearing excessive instantaneous impact load, greatly improving the safety and durability of the equipment.

[0028] When the counterweight mechanism 5 is lifted, the contact plate 62 is lifted off the ground. Under the restoring force of the second spring 64, the piston rod is pulled out of the damper 63 cylinder, and the contact plate 62 returns to its initial position. This does not affect the normal lifting and retraction of the mechanism. The entire device completes the accurate measurement of the pit depth through the counterweight detection head 3 and the lowering of the precision wire. Through the coordinated work of the adjustable counterweight and the buffer device, it provides stable support for the trolley 1 and protects its own structure in harsh construction environments, thus achieving efficient, accurate and safe pit measurement operations.

[0029] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Therefore, all equivalent changes made based on the content described in the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A surveying device for excavating foundation pits during construction, characterized in that, The device includes a trolley (1), on which a grip frame is installed. Two support plates (11) are provided on the upper side of the trolley (1). Each support plate (11) is provided with an arc-shaped support member. A winding assembly (2) is rotatably arranged between the arc-shaped support members. The connecting line of the winding assembly (2) moves downward and is parallel to the support plate (11). A counterweight detection head (3) is connected to the lower end of the connecting line of the winding assembly (2). A wire structure (4) is installed on the right side of the trolley (1). The connecting line is slidably connected to the wire structure (4). A counterweight mechanism (5) is rotatably arranged on the trolley (1).

2. The earthwork excavation measuring device for construction according to claim 1, wherein The counterweight mechanism (5) includes a first mounting frame (51), the left side of the trolley (1) is rotatably connected to the first mounting frame (51), the first mounting frame (51) is slidably connected to the second mounting frame (52), a counterweight (53) is placed inside the first mounting frame (51), the counterweight (53) is limited and locked by the second mounting frame (52), the left side of the trolley (1) is connected to two symmetrical limiting frames (54), each limiting frame (54) is slidably and rotatably connected to a latch (55), the latch (55) is used to lock and squeeze the left side of the first mounting frame (51), and a first spring (56) is connected between the latch (55) and the limiting frame (54).

3. The earthwork excavation measuring device for construction of claim 2, wherein It also includes a buffer mechanism (6), which includes a mounting cylinder (61). Multiple mounting cylinders (61) are provided on the left side of the first mounting frame (51). Each mounting cylinder (61) is equipped with a damper (63). A contact plate (62) is provided between the dampers (63). A second spring (64) is connected between the contact plate (62) and the mounting cylinder (61). The contact plate (62), the damper (63), and the second spring (64) cooperate to provide buffer support for the first mounting frame (51) after it is flipped downward.

4. The earthwork excavation measuring device for construction of claim 1, wherein A protective frame is installed on the outside of the winding assembly (2).

5. The construction earthwork foundation pit excavation measuring device according to claim 1, characterized by, The conductor structure (4) has a cross-shaped ring guide structure in the middle.

6. The earthwork excavation surveying device for construction of claim 2, wherein, The first mounting frame (51) and the second mounting frame (52) are connected by a detachable structure.

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