Concrete impermeability test piece clamping device

Abstract

The utility model relates to concrete anti -permeation test technical field, concretely is a kind of concrete anti -permeation test piece clamping device.The device includes bottom frame, vertical frame fixedly connected on bottom frame, setting mobile wheel on bottom frame, slidingly connected lifting plate on vertical frame, first drive assembly for driving lifting plate up and down displacement, clamping rod slidingly connected on the lifting plate, the clamping rod sets two groups and symmetrically sets, second drive assembly for driving clamping rod each other close or far apart is set on the lifting plate.This device realizes "device overall movement replaces artificial handling, mechanical lifting replaces artificial lifting, replaces traditional manual operation, and can more easily carry the steel test mould of assembled test piece to water pressure type anti -permeation instrument, significantly improves work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of concrete impermeability testing technology, specifically a concrete impermeability specimen clamping device. Background Technology

[0002] The impermeability of concrete is a key testing indicator in the engineering construction field, especially in projects with large concrete usage and specific requirements for impermeability. Accurate testing of this indicator is crucial. Currently, water pressure permeability analyzers are commonly used for testing concrete impermeability. The standard operating procedure is as follows: First, the concrete specimen is pressed into a steel mold. Then, workers move the assembled steel mold onto the water pressure permeability analyzer. Next, the position of the steel mold is adjusted to align with the pre-set installation interface of the analyzer. Finally, the steel mold is secured to the designated installation position of the analyzer with bolts. Workers then operate the analyzer to perform the impermeability test.

[0003] However, due to the combined weight of the concrete specimens and steel molds, the staff needs to expend a lot of physical strength during the handling process. At the same time, due to the large overall weight, it is difficult to accurately align the steel molds with the installation interface of the permeability analyzer. It often requires multiple adjustments to complete the alignment, which significantly prolongs the preparation time for a single test and has a certain impact on the testing efficiency. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a concrete permeability test specimen clamping device, which replaces traditional manual operation and can more easily transport the assembled steel test mold to the hydraulic permeability tester, significantly improving work efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a concrete impermeability test specimen clamping device, comprising a bottom frame, a vertical frame fixedly connected to the bottom frame, movable wheels disposed on the bottom frame, a lifting plate slidably connected to the vertical frame, a first driving component for driving the lifting plate to move up and down, and clamping rods slidably connected to the lifting plate. The clamping rods are provided in two sets and symmetrically arranged. A second driving component is provided on the lifting plate for driving the clamping rods to move closer or further apart from each other.

[0006] With the above structural design, the second drive component can drive the clamping rods to move closer or further apart, and the clamping rods can stably clamp the steel test mold, which can be adapted to steel test molds of different diameters and heights; the first drive component drives the lifting plate to move up and down, replacing manual lifting of the steel test mold, and lifting the steel test mold to the installation position of the hydraulic permeability meter; the entire device can be moved flexibly by the moving wheels, eliminating the need for manual handling of the combination of concrete specimens and steel test molds.

[0007] Preferably, the bottom frame is a U-shaped frame structure with an opening at the front end.

[0008] With the above structural design, the U-shaped opening allows the device to be directly "slipped" into the installation position from the front of the permeameter, without having to go around to the side or back of the permeameter to operate. This is especially suitable for scenarios where the space around the permeameter is narrow (such as when multiple permeameters are placed side by side), reducing spatial interference between the device and the permeameter.

[0009] Preferably, one or more electromagnetic chucks for adsorbing steel test molds are fixedly connected to each of the clamping rods, and the electromagnetic chucks are arranged at equal intervals.

[0010] With the above structural design, the electromagnetic chuck attracts the steel test mold through a magnetic field, eliminating the need for mechanical clamping (such as bolt compression or claw clamping), thus avoiding deformation of the test mold due to excessive mechanical force (especially for thin steel test molds), and preventing cracking of concrete specimens due to uneven clamping force.

[0011] Preferably, the ends of the lifting plates are fixedly connected to clamps, the inner sides of the clamps are rotatably connected to rollers, and the frame of the vertical frame has a sliding groove that matches the rollers.

[0012] With the above structural design, the rollers roll in the chute, converting the sliding friction between the lifting plate and the vertical frame into rolling friction, reducing the friction coefficient by more than 60%. This avoids the jamming caused by dust and oil in traditional sliding structures, ensuring smooth up-and-down movement of the lifting plate. The clamping plate and the chute form a "guiding constraint," limiting the horizontal displacement of the lifting plate (such as left-right swaying), ensuring that the lifting plate rises and falls vertically along the vertical frame. This, in turn, ensures that the clamped specimen does not deviate from the preset trajectory during the lifting process, laying the foundation for subsequent alignment with the permeability analyzer.

[0013] Preferably, the first drive assembly includes a rope with its head fixedly connected to the lifting plate, a pulley fixedly connected to the upper end of the vertical frame, a winch shaft fixedly connected to the tail end of the rope, and a winch fixedly connected to the winch shaft. The rope passes around the pulley, and the end of the winch shaft is rotatably connected to a bearing seat, which is fixedly connected to the vertical frame.

[0014] With the above structural design, the winch winds up and unwinds the rope through the winch shaft. The height of the lifting plate can be precisely adjusted by controlling the number of rotations of the winch (accuracy up to ±1mm). It can be adapted to the installation height of different models of permeability testers (such as 1.2m or 1.5m high permeability testers), avoiding height deviation when manually lifting.

[0015] Preferably, the second drive assembly includes a slider fixedly connected to the clamping rod, a bidirectional lead screw threaded through the slider, an end of the bidirectional lead screw being rotatably connected to a lifting plate, the slider being slidably connected to the lifting plate, and a handwheel being fixedly connected to one end of the bidirectional lead screw.

[0016] With the above structural design, the left and right threads of the bidirectional lead screw rotate in opposite directions. When the handwheel is turned, the sliders on both sides can drive the clamping rods to move closer or further apart synchronously, ensuring that the specimen is always clamped in the center position of the device, avoiding the specimen from tilting or falling due to clamping offset. It is manually driven by the handwheel, without relying on the electric or hydraulic system. At the same time, manual operation can sense the clamping force in real time, avoiding damage to the mold due to excessive power, thus improving safety.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This device achieves "overall device movement to replace manual handling and mechanical lifting to replace manual lifting, replacing traditional manual operation, and can more easily transport the assembled steel test mold to the hydraulic permeability tester, significantly improving work efficiency." Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front structure of this utility model; Figure 2 This is a structural diagram of the back of the present invention; Figure 3 This is a front view structural diagram of the present invention. Detailed Implementation

[0019] Please see Figure 1 , Figure 2 , Figure 3 This utility model provides a technical solution: a concrete impermeability test specimen clamping device, including a bottom frame 1, a vertical frame 2 fixedly connected to the bottom frame 1, a movable wheel 11 set on the bottom frame 1, a lifting plate 3 slidably connected to the vertical frame 2, a first driving component for driving the lifting plate 3 to move up and down, and clamping rods 4 slidably connected to the lifting plate 3. The clamping rods 4 are arranged in two sets and symmetrically. The lifting plate 3 is provided with a second driving component for driving the clamping rods 4 to move closer or further away from each other.

[0020] The caster wheel 11 is a universal caster wheel with a braking function.

[0021] The bottom frame 1 is a U-shaped frame structure with an open front end. The U-shaped open front end design allows the device to be directly "slipped" into the installation position from the front of the permeability meter.

[0022] One or more electromagnetic chucks 5 for adsorbing steel test molds are fixedly connected to each of the clamping rods 4. The electromagnetic chucks 5 are arranged at equal intervals. The electromagnetic chucks 5 use electromagnetic principles. They adsorb when energized and release when de-energized. The electromagnetic chucks 5 adopt an arc-shaped structure that matches the steel test mold. The arc-shaped structure makes the magnetic field evenly distributed along the circumference of the test mold, and the adsorption force changes from "local concentration" to "overall wrapping", without mechanical compression.

[0023] The ends of the lifting plate 3 are all fixedly connected to clamping plates 31, and the inner side of the clamping plates 31 is rotatably connected to rollers 32. The frame of the vertical frame 2 has a sliding groove 33 that matches the rollers 32.

[0024] The first drive assembly includes a rope 41 with its head fixedly connected to the lifting plate 3, a pulley 42 fixedly connected to the upper end of the vertical frame 2, a winch shaft 43 fixedly connected to the tail end of the rope 41, and a winch 44 fixedly connected to the winch shaft 43. The rope 41 passes around the pulley 42, and the end of the winch shaft 43 is rotatably connected to a bearing 45, which is fixedly connected to the vertical frame 2. Figure 1 As shown, two sets of ropes 41 and pulleys 42 are fixed on the lifting plate 3, and two sets of symmetrically arranged limiting plates 47 are fixedly connected to the winch shaft 43, with the ropes 41 positioned between the limiting plates 47. The winch 44 is a slow-speed winch, which can slowly wind up or release the ropes 41, avoiding inertial swaying of the test mold due to excessive lifting speed (such as forward tilting when rapidly rising and stopping, or impact when rapidly descending), further reducing the risk of test mold slippage and concrete specimen collision damage, and improving safety; slow operation allows for more precise height adjustment of the lifting plate 3.

[0025] The second drive assembly includes a slider 61 fixedly connected to the clamping rod 4 and a bidirectional lead screw 62 threaded through the slider 61. The end of the bidirectional lead screw 62 is rotatably connected to the lifting plate 3. The slider 61 is slidably connected to the lifting plate 3. One end of the bidirectional lead screw 62 is fixedly connected to a handwheel 63. A transverse groove matching the slider 61 is opened on the lifting plate 3. The end of the bidirectional lead screw 62 is rotatably connected to the groove wall of the transverse groove.

[0026] Working principle: First, the staff turns the handwheel 63 of the second drive component, which drives the bidirectional lead screw 62 to rotate. Since the left and right threads of the bidirectional lead screw 62 rotate in opposite directions, the slider 61 that meshes with its surface will synchronously drive the two sets of symmetrical clamping rods 4 to move closer to each other until the clamping rods 4 move to both sides of the steel test mold. Next, the slow-speed winch 44 of the first drive component is started. The winch 44 drives the winch shaft 43 to rotate slowly. The two sets of limit plates 47 (symmetrically arranged) on the winch shaft 43 can prevent the rope 41 from deviating during the winding process. After the rope 41 passes around the pulley 42 at the upper end of the vertical frame 2, it slowly winds upward and pulls the lifting plate 3. The inner side of the clamping plate 31 at the end of the lifting plate 3 is provided with rollers 32. The rollers 32 roll along the sliding groove 33 of the frame of the vertical frame 2, converting sliding friction into rolling friction, ensuring that the lifting plate 3 rises vertically and smoothly (without horizontal swaying). The operator finely adjusts the height by using the low speed (lifting speed 5-10mm / s) of the slow-speed winch 44 until the clamping rod 4 moves to below the flange ring at the upper end of the steel test mold. Then the staff turns the handwheel 63 until the electromagnetic chuck 5 adheres to the outer wall of the steel mold. The staff turns on the power of the electromagnetic chuck 5 and uses the electromagnetic principle to generate a magnetic field. The arc structure makes the magnetic field evenly distributed along the circumference of the mold, forming an "overall wrapping" adsorption to prevent the steel mold from tilting or slipping. Next, the staff will start the winch 44 to lift the steel test mold and push the bottom frame 1. The entire device will be moved by the bottom moving wheels 11. Using the U-shaped front opening structure of the bottom frame 1, the steel test mold will be directly "fitted" into the target installation position from the front of the permeability tester, so that the steel test mold is initially aligned with the test mold installation interface of the permeability tester, reducing the subsequent adjustment distance. Finally, the staff started the slow-speed winch 44 and slowly released the rope 41. The lifting plate 3 carried the steel test mold down smoothly along the slide 33 (the roller 32 ensured vertical displacement). The alignment of the steel test mold with the permeability tester installation interface was observed until the steel test mold and the permeability tester installation base were completely aligned. The power of the electromagnetic chuck 5 was disconnected, and the suction force disappeared. The handwheel 63 was rotated in the opposite direction to make the clamping rods 4 move away from each other and detach from the steel test mold. The device was pushed away from the permeability tester position, and the steel test mold was fastened to the permeability tester installation interface, completing the single specimen installation.

[0027] During disassembly, follow the steps outlined above to complete the disassembly of the steel test mold.

[0028] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the scope of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this utility model's implementation.

[0029] The present invention has been described above with reference to preferred embodiments, but the scope of protection of the present invention is not limited thereto. All technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications can be made to the present invention, and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A clamping device for concrete impermeability test specimens, characterized in that: It includes a bottom frame (1), a vertical frame (2) fixedly connected to the bottom frame (1), a moving wheel (11) set on the bottom frame (1), a lifting plate (3) slidably connected to the vertical frame (2), a first driving component for driving the lifting plate (3) to move up and down, and a clamping rod (4) slidably connected to the lifting plate (3). The clamping rod (4) is provided in two sets and symmetrically arranged. The lifting plate (3) is provided with a second driving component for driving the clamping rod (4) to move closer or further away from each other.

2. The concrete impermeability test specimen clamping device according to claim 1, characterized in that: The bottom frame (1) is a U-shaped frame structure with an opening at the front.

3. The concrete impermeability test specimen clamping device according to claim 1, characterized in that: One or more electromagnetic chucks (5) for adsorbing steel test molds are fixedly connected to each of the clamping rods (4), and the electromagnetic chucks (5) are arranged at equal intervals.

4. The concrete impermeability test specimen clamping device according to claim 1, characterized in that: The ends of the lifting plate (3) are all fixedly connected to the clamping plate (31), and the inner side of the clamping plate (31) is rotatably connected to the roller (32). The vertical frame (2) has a sliding groove (33) that matches the roller (32) on its side.

5. A concrete impermeability test specimen clamping device according to any one of claims 1 to 4, characterized in that: The first drive assembly includes a rope (41) whose head end is fixedly connected to the lifting plate (3), a pulley (42) fixedly connected to the upper end of the vertical frame (2), a winch shaft (43) fixedly connected to the tail end of the rope (41), and a winch (44) fixedly connected to the winch shaft (43). The rope (41) passes around the pulley (42), and the end of the winch shaft (43) is rotatably connected to the bearing seat (45). The bearing seat (45) is fixedly connected to the vertical frame (2).

6. The concrete impermeability test specimen clamping device according to claim 5, characterized in that: The second drive assembly includes a slider (61) fixedly connected to the clamping rod (4) and a bidirectional lead screw (62) threaded through the slider (61). The end of the bidirectional lead screw (62) is rotatably connected to the lifting plate (3), the slider (61) is slidably connected to the lifting plate (3), and one end of the bidirectional lead screw (62) is fixedly connected to a handwheel (63).

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