Automatic clamping device for concrete impermeability test piece

Abstract

The utility model belongs to the technical field of application of concrete experimental equipment, and particularly relates to an automatic clamping device for a concrete anti-permeability test piece. The clamping device comprises two n-shaped racks arranged at an interval and a three-axis truss mechanism arranged on the racks, a clamping mechanism is arranged at the bottom of a Z axis of the three-axis truss mechanism and comprises a fixing frame arranged at the bottom of the Z axis, the fixing frame is arranged in an inverted U shape, a motor base is arranged in the fixing frame, and the motor base is connected with the Z axis of the three-axis truss mechanism. According to the automatic clamping device for the concrete anti-permeability test piece, through the arrangement of the three-axis truss mechanism and the clamping mechanism, the test piece can move among the placing table, the coating table and the pressing machine, and through the design of the clamping mechanism, the requirement for automatic coating is met; therefore, the clamping, smearing and loading actions are automatically completed, the labor intensity of experimenters is reduced, and meanwhile, the device is simple in structure, convenient to process and suitable for large-scale popularization and application.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete experimental equipment application, in particular to an automatic clamping device for concrete anti-seepage test pieces. Background Art

[0002] Concrete is a material widely used in construction and infrastructure projects, and the impermeability of concrete is one of its important mechanical properties. Concrete is a porous body with different pore sizes (10 to 500 μm). When there is a pressure difference (or concentration difference, temperature difference, potential difference) in the surrounding medium, there will be medium migration that obeys fluid mechanics, that is, permeation. The impermeability of concrete is a basic property of concrete and an important feature of concrete durability. The impermeability of concrete not only represents the ability of concrete to resist water flow, but also affects the concrete's resistance to carbonization and chloride ion penetration. Therefore, the testing and evaluation of its impermeability is particularly important.

[0003] The existing concrete impermeability test mainly makes concrete into test blocks with an upper diameter of 175mm, a lower diameter of 185mm, and a height of 150mm. After the test block is dried, a layer of sealing material is applied to the side of the test block, and then it is pressed into the sleeve mold and placed in the impermeability tester for relevant tests. Due to the limitation of volume, the weight of the existing test blocks is generally between 7kg and 8kg. The heavy test blocks bring a greater burden to the experimenters when applying sealing materials and placing them on the press. Therefore, how to reduce the labor intensity of the experimenters is a problem that needs to be solved in this application. Utility Model Content

[0004] Aiming at the technical problems existing in the coating and transportation of test blocks of existing concrete anti-seepage experiments, the utility model proposes an automatic clamping device for concrete anti-seepage test pieces which has a reasonable design, a simple structure and can automatically complete the coating and placement work.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: the utility model provides an automatic clamping device for concrete impermeability test pieces, comprising two gate-shaped frames arranged at intervals and a three-axis truss mechanism arranged on the frames, a clamping mechanism is arranged at the bottom of the Z axis of the three-axis truss mechanism, the clamping mechanism comprises a fixed frame arranged at the bottom of the Z axis, the fixed frame is arranged in an inverted U shape, a motor seat is arranged in the fixed frame, a flip shaft is arranged on both sides of the motor seat, a flip mechanism for driving the flip shaft to flip is arranged on the fixed frame, a rotating motor is arranged at the top of the motor seat, a negative pressure suction cup is arranged at the bottom of the motor seat, the negative pressure suction cup is connected to the power end of the rotating motor, and the negative pressure suction cup can be rotatably arranged at the bottom of the motor seat under the action of the rotating motor, a fixing plate is also arranged at the front end of the fixing frame, the fixing plate and the fixing frame are arranged at intervals, a pushing mechanism is arranged on the fixing plate, the power end of the pushing mechanism is connected to a push rod, and the push rod is arranged toward the fixing frame.

[0006] Preferably, the pushing mechanism is a pneumatic cylinder or an electric cylinder.

[0007] Preferably, the end of the push rod facing one end of the fixing frame is spherical.

[0008] Preferably, the flip mechanism comprises a flip cylinder arranged on one side of the fixing frame and a flip rack arranged on the power end of the flip cylinder, and a gear meshing with the flip rack is arranged on the flip shaft.

[0009] Preferably, a connecting plate is provided between the fixing frame and the fixing plate, and the fixing plate is spaced apart from the fixing frame under the action of the connecting plate.

[0010] Compared with the prior art, the advantages and positive effects of the utility model are:

[0011] 1. The utility model provides an automatic clamping device for concrete impermeability test pieces. Through the arrangement of a three-axis truss mechanism and a clamping mechanism, the movement of the test piece between a placement table, a coating table and a press is satisfied. Through the design of the clamping mechanism, the need for automatic coating is satisfied, thereby realizing the automatic completion of the action requirements of clamping, coating and loading, reducing the labor intensity of the experimenters. At the same time, the utility model has a simple structure, is easy to process, and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0013] Figure 1 A schematic diagram of the structure of the automatic clamping device for concrete impermeability test pieces provided in Example 1;

[0014] Figure 2 A rear view of the automatic clamping device for concrete impermeability test pieces provided in Example 1;

[0015] Figure 3 A schematic diagram of the structure of the clamping mechanism provided in Example 1;

[0016] Figure 4 A schematic diagram of the structure of the clamping mechanism provided in Example 1 in the application state

[0017] In the above figures, 1. frame; 2. three-axis truss mechanism; 21. Z-axis; 3. clamping mechanism; 31. fixed frame; 32. motor seat; 33. flip axis; 34. rotating motor; 35. negative pressure suction cup; 36. gear; 4. flip mechanism; 41. flip cylinder; 42. flip rack; 5. fixed plate; 51. pushing mechanism; 52. push rod; 6. connecting plate. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0020] Embodiment 1, as Figure 1 to Figure 4 As shown, this embodiment is intended to help experimenters carry concrete specimens and reduce labor intensity. To this end, the automatic clamping device for concrete impermeability specimens provided in this embodiment includes two gate-shaped racks 1 arranged at intervals and a three-axis truss mechanism 2 arranged on the rack 1. The three-axis truss mechanism 2 includes an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism, wherein the Y-axis moving mechanism is arranged on the top of the rack 1, the X-axis moving mechanism is horizontal on the two Y-axis moving mechanisms, and the Z-axis moving mechanism is arranged on the X-axis. The above structure is the structure of the existing common truss manipulator. Therefore, in this embodiment, it is not described in detail. The setting of the three-axis truss mechanism 2 is mainly to meet the movement of the specimen between the placement table (for placing the specimen), the coating table and the press.

[0021] In order to realize the movement of the specimen and meet the needs of applying the sealing material, in the present embodiment, a clamping mechanism 3 is arranged at the bottom of the Z-axis 21 of the three-axis truss mechanism 2. Since the side wall (circumferential surface) of the specimen needs to be coated, the clamping mechanism 3 needs to meet the need of exposing all the side walls of the specimen. At the same time, in order to meet the needs of automatic coating, the specimen needs to be exposed and the specimen can rotate. For this reason, the clamping mechanism 3 includes a fixed frame 31 arranged at the bottom of the Z-axis 21. The fixed frame 31 is arranged in an inverted U-shape, that is, the fixed frame 31 includes a top plate and side plates arranged on both sides of the top plate. A motor seat 32 is arranged in the fixed frame 31, and flip shafts 33 are arranged on both sides of the motor seat 32. Bearings are arranged on the fixed frame 31 for flipping the flip shaft 33. At the same time, a flip mechanism 4 for driving the flip shaft 33 to flip is provided on the fixed frame 31. Considering that the flip of the motor base 32 only needs 90 degrees, even if the specimen is kept in a vertical or horizontal state, in this embodiment, the flip mechanism 4 includes a flip cylinder 41 provided on one side of the fixed frame 31 and a flip rack 42 provided at the power end of the flip cylinder 41, and a gear 36 meshing with the flip rack 42 is provided on the flip shaft 33. Of course, a corresponding limit track is provided on the fixed frame 31 to ensure the stability of the flip rack 42.

[0022] In order to realize the rotation of the specimen, in the present embodiment, a rotating motor 34 is arranged on the top of the motor seat 32. At the same time, in order to expose the side wall of the specimen, a negative pressure suction cup 35 is arranged at the bottom of the motor seat 32. The negative pressure suction cup 35 is connected to the power end of the rotating motor 34. The negative pressure suction cup 35 can be rotatably arranged at the bottom of the motor seat 32 under the action of the rotating motor 34. In this way, the rotation of the specimen in a horizontal state can be realized. Of course, the size of the fixing frame 31 should meet the exposure requirements of the specimen in a horizontal state.

[0023] Considering that the specimen needs to be rotated in a horizontal state, and the specimen itself is heavy, in order to ensure the stability of the rotation, in this embodiment, a fixing plate 5 is also provided at the front end of the fixing frame 31, and the fixing plate 5 is spaced apart from the fixing frame 31. Specifically, a connecting plate 6 is provided at the top of the fixing frame 31, and the fixing plate 5 is fixed to the other end of the connecting plate 6, so that an inverted U-shaped arrangement is formed between the fixing frame 31, the connecting plate and the fixing plate 5. At the same time, a pushing mechanism 51 is provided on the fixing plate 5, and the power end of the pushing mechanism 51 is connected to a push rod 52, and the push rod 52 is arranged toward the fixing frame 31. In this way, the other end of the specimen is also supported, thereby meeting the rotation needs of the specimen. Of course, in order to ensure the reliability of the rotation, the end of the push rod 52 facing one end of the fixing frame 31 is spherically arranged. The pushing mechanism 51 is a cylinder or an electric cylinder.

[0024] Through the above-mentioned arrangement, the clamping mechanism 3 firstly adsorbs the specimen on the placing table, and then, with the help of the three-axis truss mechanism 2, moves to the top of the coating table. At this time, the flipping mechanism 4 is actuated to change the specimen from a vertical state to a horizontal state, and then, the pushing mechanism 51 works, and then, the Z axis descends, so that the surface of the specimen contacts the brush or disk containing the sealing material, and the rotating motor 34 works. After the coating is completed, the pushing mechanism 51 is reset, the flipping mechanism 4 is reset, and then, it is moved to the press position.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An automatic clamping device for concrete impermeability test pieces, comprising two gate-shaped frames arranged at intervals and a three-axis truss mechanism arranged on the frames, characterized in that: A clamping mechanism is provided at the bottom of the Z-axis of the three-axis truss mechanism, and the clamping mechanism includes a fixed frame arranged at the bottom of the Z-axis, the fixed frame is arranged in an inverted U-shape, a motor seat is arranged in the fixed frame, a flip shaft is arranged on both sides of the motor seat, and a flip mechanism for driving the flip shaft to flip is arranged on the fixed frame, a rotating motor is arranged on the top of the motor seat, a negative pressure suction cup is arranged at the bottom of the motor seat, the negative pressure suction cup is connected to the power end of the rotating motor, and the negative pressure suction cup can be rotatably arranged at the bottom of the motor seat under the action of the rotating motor, and a fixed plate is also provided at the front end of the fixed frame, and the fixed plate and the fixed frame are spaced apart, and a pushing mechanism is provided on the fixed plate, and the power end of the pushing mechanism is connected to a push rod, and the push rod is arranged toward the direction of the fixed frame.

2. The automatic clamping device for concrete impermeability test piece according to claim 1, characterized in that: The pushing mechanism is a pneumatic cylinder or an electric cylinder.

3. The automatic clamping device for concrete impermeability test piece according to claim 2, characterized in that: The end of the push rod facing one end of the fixing frame is spherical.

4. The automatic clamping device for concrete impermeability test piece according to any one of claims 1 to 3, characterized in that: The flip mechanism comprises a flip cylinder arranged on one side of the fixing frame and a flip rack arranged on the power end of the flip cylinder, and a gear meshing with the flip rack is arranged on the flip shaft.

5. The automatic clamping device for concrete impermeability test piece according to claim 4, characterized in that: A connecting plate is arranged between the fixing frame and the fixing plate, and the fixing plate is arranged at a distance from the fixing frame under the action of the connecting plate.

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