Low-strain take-up device

Abstract

The utility model discloses a low-strain take-up device in the related technical field of sensing wire take-up, which comprises a hollow box body, a rotary top cover which covers the box body and is rotationally connected with the upper edge of the box body, and a rotary column which is arranged in the box body and is used for connecting the box body and the rotary top cover, a containing space is formed between the rotating top cover and the box body, two symmetrical clamping grooves are formed in the box body, and the clamping grooves face the rotating top cover and extend to the upper end face of the rotating top cover. The sensing wire storage box comprises the baffle arranged in the closed cavity, the baffle is connected with the inner wall of the box body through the elastic supporting piece, the sensing wire is gathered and limited, when the sensing wire is wound to the enough width, acting force is generated on the baffle, the elastic supporting piece is pressed and contracted, it is guaranteed that the sensing wire can be normally wound and stored, and meanwhile the sensing wire storage box is convenient to use. The sensing line is prevented from loosening and scattering after being stored in the box body, and a guarantee is provided for drawing out the sensing line again.

Description

Low strain take-up Technical Field

[0001] This utility model belongs to the technical field of sensor wire take-up, specifically, it relates to a low-strain take-up device. Background Technology

[0002] Low-strain testing is a commonly used method in pile foundation testing. It involves striking the top of the pile with a small hammer, and then using a sensor attached to the pile top to receive stress wave signals from within the pile. Stress wave theory is then used to study the dynamic response of the pile-soil system, and the measured velocity and frequency signals are analyzed to determine the pile's integrity. This method requires practical instruments, including low-strain sensors connected by sensor wires. In actual field testing, due to the variable conditions of construction sites, testing personnel need to constantly reel in and out the wires, which is cumbersome, increases their workload, and reduces testing efficiency. Furthermore, the thin sensor wires are easily dragged or trampled during field testing, increasing the damage rate and affecting testing efficiency. Therefore, it is crucial to develop a device that can both protect the sensor wires and meet testing requirements.

[0003] The purpose of this invention is to solve the above-mentioned problems and provide a sensor take-up device that can both protect the sensor wire from damage and allow it to extend and retract freely. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a low-strain take-up device. The basic concept of the technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows:

[0005] The low strain take-up device includes a hollow box, a rotating top cover covering the box and rotatably connected to the upper edge of the box, and a rotating column located inside the box and connecting the box and the rotating top cover. A receiving space is formed between the rotating top cover and the box. The box has two symmetrical slots facing the rotating top cover and extending to the upper end face of the rotating top cover.

[0006] The rotating column includes a support base located at the center of the box and a connecting column rotatably connected to the support base. The connecting column is connected to the rotating top cover and has a wire groove in the same direction as the slot opening. The wire groove communicates with the slot to form a wire take-up area, and the wire take-up area communicates with the receiving space.

[0007] A sensor wire is threaded through the slot and passes through both ends of the slot.

[0008] Furthermore, the sealed cavity formed by the box body and the rotating top cover is provided with several baffles parallel to the connecting columns. The baffles are symmetrical arc-shaped structures arranged on both sides of the slot. Sliding parts are provided on the adjacent end faces of the baffles, the box body, and the rotating top cover. Slide rails are provided at the corresponding positions of the sliding parts on the box body and the rotating top cover. The baffles are connected to the inner wall of the box body by elastic support parts.

[0009] Furthermore, both the box body and the rotating top cover are cylindrical, with a height of 3-5cm and an outer diameter of 4.5-6cm. The box body and the rotating top cover are connected to form a cylinder, and the outer diameter of the box body is equal to the outer diameter of the rotating top cover.

[0010] Furthermore, the bottom of the card slot is provided with a flexible interlayer for holding the sensor wire.

[0011] Furthermore, the rotating top cover has a dust cover on the opening area, and the rotating top cover is provided with a groove that matches the card slot.

[0012] Furthermore, the rotating column also includes a rotating component that rotatably connects the support base and the connecting column.

[0013] Furthermore, the sensor wires are driven to move by the connecting column.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0015] This utility model includes a baffle installed in a sealed chamber. The baffle is connected to the inner wall of the box through an elastic support member, which plays a role in gathering and limiting the sensor wire. When the sensor wire is wound to a sufficient width, it exerts a force on the baffle, causing the elastic support member to be compressed and contracted. This ensures that the sensor wire can be wound and stored normally, while preventing the sensor wire from becoming loose and scattered after being stored inside the box, thus providing a guarantee for the sensor wire to be pulled out again.

[0016] The bottom of the slot of this utility model is provided with a flexible interlayer. The flexible interlayer stretches the sensing wire, keeping the sensing wire neat and preventing it from bending or knotting. This prevents the conductive wire from being bent and damaged or broken after being stored in the sealed chamber. At the same time, the flexible interlayer rubs against the sensing wire, keeping the surface of the sensing wire clean and preventing contaminants adhering to the sensing wire from being drawn into the take-up device and damaging it, thus ensuring the safe and normal use of the take-up device.

[0017] This invention enables automatic winding and unwinding of the sensor wire, allowing the length of the sensor wire to be adjusted according to the actual situation on site during the testing process. This facilitates on-site testing, improves the efficiency of data acquisition, and avoids the risk of the sensor wire being dragged or stepped on by personnel due to its excessive length on the construction site. It also protects the sensor wire from external damage and extends its service life.

[0018] The retractor of this utility model has a compact overall size, is easy to operate, does not take up too much storage space, and can be neatly stored after measurement, which facilitates the storage of the instrument. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the sensor take-up device of this utility model;

[0020] Figure 2 is a schematic diagram of the box body of this utility model;

[0021] Figure 3 is a schematic diagram of the rotating column of this utility model;

[0022] Figure 4 is a schematic diagram of the sensor take-up device of Embodiment 2 of this utility model;

[0023] Figure 5 is a schematic diagram of the rotating column in Embodiment 3 of this utility model;

[0024] Figure 6 is a schematic diagram of the rotating column in Embodiment 4 of this utility model.

[0025] Figure 7 is a schematic diagram of the sensor take-up device according to Embodiment 5 of this utility model.

[0026] In the diagram: 1. Box body; 2. Rotating top cover; 3. Rotating column; 31. Support base; 32. Connecting column; 321. Cable groove; 33. Rotating component; 4. Baffle; 41. Sliding component; 5. Elastic support component; 6. Dust cover; 7. Sensor wire; 11. Slot; 111. Flexible interlayer. Detailed Implementation

[0027] As shown in Figures 1 to 7, the low-strain take-up device includes a hollow box 1, a rotating top cover 2 that covers the box 1 and is rotatably connected to the upper edge of the box 1, and a rotating column 3 located inside the box 1 that connects the box 1 and the rotating top cover 2. A receiving space is formed between the rotating top cover 2 and the box 1. The box 1 has two symmetrical slots 11 facing the rotating top cover 2 and extending to the upper end face of the rotating top cover 2. The rotating column 3 includes a support base 31 located at the center of the box and a connecting column 32 rotatably connected to the support base 31. The connecting column 32 is connected to the rotating top cover 2 and has a wire groove 321 that faces the same direction as the opening of the slot 11. The wire groove 321 communicates with the slot 11 to form a take-up area. The take-up area communicates with the receiving space. A sensing wire 7 is threaded through the wire groove 321. The sensing wire 7 passes through both ends of the slot 11 and is driven to move by the connecting column 32.

[0028] Example 1: The entire cable take-up device is cylindrical, with a height of 3-5cm and an outer diameter of 4.5-6cm. The structure formed by connecting the box body 1 and the rotating top cover 2 is cylindrical, and the outer diameter of the main body of the box body 1 is equal to the outer diameter of the rotating top cover 2.

[0029] The bottom of the card slot 11 may be provided with an arc-shaped flexible interlayer 111 for holding the sensor wire 7;

[0030] The rotating top cover 2 and the connecting column 32 are connected or fixedly connected by a snap-fit ​​structure. The snap-fit ​​structure includes a protrusion perpendicular to the outer wall of the connecting column 32 and a connecting groove provided in the rotating top cover 2 that mates with the protrusion; or the rotating top cover 2 and the connecting column 32 are integrally formed.

[0031] The connection between the box body 1 and the rotating top cover 2 includes, but is not limited to, the following:

[0032] 1. The lower part of the rotating top cover 2 is fitted onto the outer side of the upper edge of the box body 1: the outer diameter of the upper edge of the box body 1 is smaller than the outer diameter of the main body of the box body 1, that is, the connection between the upper edge of the box body 1 and the outer wall of the main body of the box body 1 forms an outer platform for receiving the rotating top cover 2. The inner diameter of the rotating top cover 2 matches the outer diameter of the upper edge of the box body 1, and the rotating top cover 2 overlaps on the outer platform.

[0033] 2. The lower part of the rotating top cover 2 is connected to the inner side of the upper edge of the box body 1: The inner diameter of the upper edge of the box body 1 is larger than the inner diameter of the main body of the box body 1. That is, the connection between the upper edge of the box body 1 and the inner wall of the main body of the box body 1 forms an internal platform for supporting the main body of the box body 1. The outer diameter of the rotating top cover 2 matches the inner diameter of the upper edge of the box body 1. The lower part of the rotating top cover 2 overlaps on the internal platform.

[0034] As shown in Figure 3, the bottom of the connecting post 32 is sleeved on the support base 31, and the connecting post 32 is movably connected to the support base 31. Since the upper part of the connecting post 32 is relatively fixedly connected to the rotating top cover 2, when the rotating top cover 2 rotates, it drives the connecting post 32 to rotate, thereby winding or unwinding the sensing wire provided in the wire groove of the connecting post 32.

[0035] Example 2: Compared with Example 1, the sensor retractor in this example also includes a baffle 4 disposed inside the receiving space and arranged in the same direction as the connecting column 32. Figure 4 is a schematic diagram of the sensor retractor of Example 2. As shown in Figure 4, the baffle 4 is an arc-shaped baffle symmetrically disposed on both sides of the rotating column 3. Sliding members 41 are provided on the upper and lower end faces of the baffle 4. That is, the sliding members 41 are disposed on the end faces adjacent to the box body 1 and the rotating top cover 2. The box body 1 and the rotating top cover 2 are respectively provided with slide rails for the sliding members to slide at the corresponding positions of the sliding members 41. The baffle 4 is connected to the inner wall of the box body 1 by providing elastic support members 5.

[0036] The baffle 4 is connected to the inner wall of the box 1 through the elastic support 5, which plays a role in gathering and limiting the sensor wire 7. When the sensor wire 7 is wound to a sufficient width, it exerts a force on the baffle 4, causing the elastic support 5 to be compressed and contracted. This ensures that the sensor wire 7 can be wound and stored normally, while preventing the sensor wire 7 from becoming loose and scattered after being stored inside the box 1, thus providing a guarantee for the sensor wire 7 to be pulled out again.

[0037] The distance between the bottom of the slot 11 and the bottom surface of the box 1 is 1 / 3 to 1 / 2 of the height of the box 1. The rotating top cover 2 has a corresponding slot in the area adjacent to the slot 11.

[0038] As shown in Figure 4, the baffle 4 is an arc-shaped baffle symmetrically arranged on both sides of the slot 11. The arc-shaped baffle and the adjacent end face of the box body 1 and the rotating top cover 2 are provided with sliding parts 41. The box body 1 and the rotating top cover 2 are provided with slide rails at the corresponding positions of the sliding parts 41. The baffle 4 and the inner wall of the box body 1 are connected by elastic support parts 5.

[0039] In this embodiment of the invention, the elastic support 5 is a compression spring. When the line is not being wound up, the elastic support 5 is in a naturally relaxed state, and the distance between the baffle 4 and the inner wall of the box 1 is the farthest.

[0040] The central area of ​​the connecting post 32 is provided with a groove 321 for the sensor wire 7 to pass through. The opening width of the groove 321 is equal to the opening width of the slot 11. The distance between the groove 321 and the bottom surface of the box 1 corresponds to the distance between the bottom surface of the slot 11 and the bottom surface of the box 1, or the lowest point of the opening of the groove 321 is flush with the lowest point of the slot 11.

[0041] The bottom of the slot 11 is provided with a flexible interlayer 111 for holding the sensor wire 7. The sensor wire 7 is clamped on the flexible interlayer 111. The outline of the flexible interlayer 111 fits the bottom of the slot 11, and a connection hole for the sensor wire 7 to pass through is provided near the symmetrical area of ​​the slot 11. The flexible interlayer 111 is a flexible polymer material interlayer.

[0042] The rotating top cover 2 can be equipped with a handle for easy rotation;

[0043] The bottom of the housing 1 can be provided with support feet for connecting to the ground, which increases the grip and ensures a stable connection between the reel and the ground, thus ensuring the stability of the reel during use.

[0044] The operation method of the take-up device in this embodiment includes the following steps:

[0045] During on-site testing, the sensor wire 7 is placed in the wire groove 321 of the connecting post 32 and passes through the slot 11 at the same time. At this time, the direction of the wire groove 321 is the same as the direction of the slot 11, and the orientation of the corresponding groove is the same as the orientation of the slot 11. That is, the section of the sensor wire 7 in the take-up device is in a straight state, the elastic support 5 is naturally straightened, and the distance of the baffle 4 is minimized.

[0046] Reeling in: Rotate the top cover 2 to drive the connecting post 32 to rotate, so that the sensor wire 7 moves from the slot 11 into the sealed chamber of the reel. The sensor wire 7 is cleaned and straightened through the flexible interlayer 111. The sensor wire 7 is wound around the connecting post 32. As the number of turns of the sensor wire 7 increases, the sensor wire 7 exerts a force on the baffle 4, which compresses the elastic support 5, thereby driving the baffle 4 to move outward.

[0047] Wire placement: Rotate the top cover 2 in the opposite direction to make the component move in the opposite direction, and finally make the sensor wire 7 move out of the slot 11.

[0048] When performing take-up or release operations, the sensor wires placed on the connecting post 32 move circumferentially around the connecting post 32, allowing the sensor wires to enter or leave the slots at both ends simultaneously, increasing the efficiency of take-up and release.

[0049] Example 3: In the above embodiment, the rotating column 3 also includes a rotating component 33 that rotatably connects the support base 31 and the connecting column 32, as shown in Figure 5. The rotating component 33 is a driving device provided on the support base 31 for driving the connecting column 32 to rotate. Optionally, the driving device is a driving motor provided in the mounting groove of the support base 31. The rotating shaft of the driving motor is connected to the connecting column 32, thereby driving the connecting column 32 to rotate. The rotating top cover 2 connected to the connecting column 32 rotates in the same direction as the connecting column 2.

[0050] The rotating shaft of the drive motor is connected to the connecting column 32. The drive motor is a drive motor that can rotate in both directions. The drive motor is electrically connected to the drive power supply through a circuit.

[0051] When winding up the wire, the drive motor is started, causing the connecting post 32 to rotate, which in turn drives the rotating top cover 2 to rotate, and the sensing wire 7 is wound around the connecting post 32; when unwinding the wire, the drive motor is rotated in the opposite direction, and finally the sensing wire 7 is released from the slot 11.

[0052] Example 4: Compared with Example 3, the difference in this example is that the rotating component is an inverted T-shaped rotating rod 33 that penetrates the bottom of the box body and the support base 31, and is connected to the connecting column 32 at the top; the rotating rod includes a vertical shaft portion that penetrates the bottom of the box body 1 and the support base 31 and extends to the lower part of the connecting column 32, and a horizontal portion located at the bottom of the box body 1. A through hole is provided at the central axis of the support base 31, and the vertical shaft portion of the rotating rod is located in the through hole; the vertical shaft portion rotates coaxially with the connecting column 32, and the upper part of the vertical shaft portion is connected to the connecting column 32 by a spline combination or directly fixedly connected to the connecting column 32;

[0053] The horizontal part is cylindrical or strip-shaped and is embedded in the bottom surface of the box body 1. The length of the horizontal part is less than the diameter of the bottom surface of the shell. The bottom surface of the box body 1 is provided with a cylindrical groove for the horizontal part to rotate. The central axis of the cylindrical groove is coaxial with the central axis of the rotating part. The outer wall of the vertical shaft part is provided with a spring. One end of the spring is connected to the vertical shaft part and the other end is connected to the side wall of the through hole.

[0054] Near the side of the cylindrical groove, the horizontal part is provided with a built-in pin assembly. The side wall of the cylindrical groove is provided with a slot corresponding to the pin shaft of the pin assembly. The slot is arranged circumferentially along the side wall of the cylindrical groove. The depth of the cylindrical groove is less than the thickness of the bottom surface of the box 1.

[0055] When the rotating part rotates, the pin end face of the pin assembly is flush with the end face of the horizontal part on which it is installed; when winding up the wire, the horizontal part is rotated, causing it to rotate in the cylindrical groove, which in turn drives the vertical shaft to rotate, and further drives the connecting post 32 to rotate, causing it to wind the sensing wire in the wire groove, so that the sensing wire is stored in the receiving space. After winding up the wire, the pin assembly is operated so that the pin protrudes from the end face of the horizontal part, extends into the slot and abuts against the slot, preventing the vertical shaft from reversing under the action of the spring.

[0056] During the wire release, the pin of the latch assembly is reset, causing the vertical shaft to reverse under the force of the spring, which moves the sensing wire out of the receiving space. After the wire is released to the required length, the pin is protruded from the horizontal end face again, causing the rotating part to stop rotating.

[0057] Example 5: The take-up device may also include a dust cover 6 located on the opening area of ​​the rotating top cover 2, as shown in Figure 7. The side of the dust cover 6 is connected to the opening edge of the rotating top cover 2. The dust cover 6 includes a first cover body connected to the top surface of the rotating top cover 2, a second cover body and a third cover body located at both ends of the first cover body and perpendicular to the two ends of the cover body. The first cover body is connected to the top surface of the box body 1 through a connecting component. The connecting component includes a connecting protrusion located on the side of the first cover body and extending to the top surface of the box body, and a slot located on the top surface of the box body 1 and corresponding to the connecting protrusion. The lower ends of the second cover body and the third cover body are higher than the top edge of the box body 1, that is, the height of the second cover body and the third cover body is less than the height of the rotating top cover 2.

[0058] As an alternative, the connecting component can also be a ball-operated buckle component, which includes an "Ω"-shaped clip located on the side of the first cover and an elastic gripper located on the top surface of the rotating box 1 and corresponding to the clip.

[0059] The connecting component makes the first cover body and the box body 1 relatively fixedly connected, ensuring that the dust cover 6 will not fall off when rotating together with the rotating top cover 2; the dust cover 6 can prevent dust from entering the interior of the receiving space through the slot of the corresponding slot, thereby contaminating the components and sensing wires inside the receiving space, ensuring the cleanliness of the components and sensing wires, and ensuring the stability of the performance and service life of the sensing wire take-up device.

[0060] Before the sensor wire take-up and take-up operation, place the sensor wire on the wire groove and then install the dust cover 6.

[0061] Among them, the sliding component 41 is a pulley;

[0062] The outer wall of the connecting column 32 may also be provided with a horizontal column perpendicular to itself. When the elastic support 5 is in a free and relaxed state, the end of the horizontal column is in contact with the inner surface of the baffle or there is a gap of 0.5 to 1 mm.

[0063] The horizontal column helps to organize and further fix the sensor wires wound on the connecting column 32, so that the sensor wires can be compactly and orderly stored inside the receiving space.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above embodiments merely illustrate preferred implementations of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of this invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A low-strain take-up device, comprising a hollow box (1), a rotating top cover (2) covering the box (1) and rotatably connected to the upper edge of the box (1), and a rotating column (3) disposed inside the box (1) connecting the box (1) and the rotating top cover (2), characterized in that: The rotating top cover (2) and the box body (1) form a receiving space. The box body (1) is provided with two symmetrical slots (11). The slots (11) face the rotating top cover (2) and extend to the upper surface of the rotating top cover (2). The rotating column (3) includes a support base (31) located at the center of the box body and a connecting column (32) rotatably connected to the support base (31). The connecting column (32) is connected to the rotating top cover (2) and is provided with a wire groove (321) in the same direction as the opening of the slot (11). The wire groove (321) communicates with the slot (11) to form a wire take-up area. The wire take-up area communicates with the receiving space. A sensor wire (7) is threaded through the wire groove (321). The sensor wire (7) passes through both ends of the slot (11).

2. The low-strain take-up device according to claim 1, characterized in that, The sealed cavity formed by the box body (1) and the rotating top cover (2) is provided with several baffles (4) parallel to the connecting column (32). The baffles (4) are arc-shaped structures symmetrically arranged on both sides of the slot (11). Sliding parts (41) are provided on the adjacent end faces of the baffles (4), the box body (1) and the rotating top cover (2). Slide rails are provided at the corresponding positions of the box body (1) and the rotating top cover (2) and the sliding parts (41). The baffles (4) are connected to the inner wall of the box body (1) by elastic support members (5).

3. The low-strain take-up device according to claim 1, characterized in that, Both the box body (1) and the rotating top cover (2) are cylindrical, with a total height of 3-5cm and an outer diameter of 4.5-6cm.

4. The low-strain take-up device according to claim 1, characterized in that, The bottom of the slot (11) is provided with a flexible interlayer (111) for holding the sensor wire (7).

5. The low-strain take-up device according to claim 1, characterized in that, The dust cover (6) on the opening area of ​​the rotating top cover (2) is provided with a groove that matches the slot (11).

6. The low-strain take-up device according to claim 1, characterized in that, The rotating column (3) also includes a rotating component (33) that rotatably connects the support base (31) and the connecting column (32).

7. The low-strain take-up device according to claim 1, characterized in that, The sensing line (7) is driven to move by the connecting column (32).

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