Fixing device for concrete cylinder detection

Abstract

The utility model belongs to the field of building material detection, and provides a fixing device for concrete cylinder detection, which comprises a circular truncated cone, a fixing table is arranged at the circle center position of the circular truncated cone, a plurality of groups of clamping components are uniformly arranged on the circular truncated cone around the fixing table, each clamping component comprises a base, a sliding seat is arranged on the base in a sliding manner, and the sliding seat is arranged on the base. A connecting block is rotationally arranged at the front end of the sliding seat, a pair of pressing wheels is rotationally arranged on the connecting block, and a baffle is arranged on the base and located on the back face of the sliding seat. Firstly, the sliding seats are pushed backwards through the pushing handle, the guide rods move backwards in the round holes, the springs are compressed, when the sliding seats make contact with the rear limiting columns, the locking assemblies are used for locking the sliding seats, after all the sliding seats are locked, the cylindrical test piece is placed on the fixing table according to requirements, and then the cylindrical test piece is placed on the fixing table. And finally, the locking assembly cancels the locking of the sliding seat, the spring recovers the deformation, the sliding seat moves forwards under the action of the spring, and the pressing wheel presses the cylindrical test piece.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of building material detection, especially relates to a fixing device for concrete cylinder detection. BACKGROUND

[0002] In the field of concrete material performance detection, the axial compressive strength of the cylindrical test piece is regarded as one of the core evaluation indexes. As a base material widely used in the fields of construction, transportation, water conservancy and the like, the performance of concrete is directly related to the safety and durability of structures. The test using the cylindrical test piece can more accurately simulate the stress state in the actual engineering, and the regular geometric shape and uniform stress distribution characteristics make the detection data more representative. When the concrete cylinder is detected, it needs to be fixed by using a fixing device.

[0003] Some conventional fixing devices adopt bolt fastening or manual clamping mode, which can easily lead to uneven distribution of clamping force and cause local damage of the test piece. The independent adjusting mechanism of some fixing devices is inefficient, and it is difficult to adapt to the rapid detection needs of test pieces of different specifications. In addition, the rigid contact surface can easily produce indentation on the surface of the test piece, affecting the detection accuracy. UTILITY MODEL CONTENT

[0004] In view of the above problems, the purpose of the utility model is to provide a fixing device for concrete cylinder detection, which aims to solve the above problems.

[0005] The utility model adopts the following technical scheme:

[0006] The fixing device comprises a circular table, a fixed table is arranged at the center of the circular table, a plurality of clamping assemblies are uniformly arranged around the fixed table, the clamping assembly comprises a base, a sliding seat is slidably arranged on the base, a connecting block is rotatably arranged at the front end of the sliding seat, a pair of pressing wheels are rotatably arranged on the connecting block, a baffle is arranged on the back of the sliding seat on the base, a circular hole is formed in the baffle, a guide rod is arranged on the back of the sliding seat, the guide rod penetrates through the circular hole, a spring is arranged on the guide rod, a limiting column is arranged on the base at the front and rear positions of the sliding seat, and a locking assembly for positioning the sliding seat is arranged on the base.

[0007] Further, a limiting hole is formed in the sliding seat, the locking assembly comprises a bracket mounted on the base, a sleeve is arranged on the bracket, a pair of clamping grooves are formed above the sleeve, a latch is arranged in the sleeve, a top cap is arranged above the latch, the limiting hole is aligned with the latch in the upward and downward directions, a pair of clamping strips matched with the clamping grooves are formed on the top cap, and the sleeve supports the top cap through the clamping strips.

[0008] Further, the circular table is provided with an adjusting groove corresponding to each base, the bottom surface of the base is provided with a silk cover, the silk cover is located in the adjusting groove, an adjusting screw is rotatably arranged in the adjusting groove, and the silk cover is arranged on the adjusting screw.

[0009] Further, the sliding seat is provided with a pushing handle.

[0010] The beneficial effects of the utility model are as follows: firstly, the four sliding seats are pushed a small distance backward in sequence through the pushing handle, the sliding seat and the guide rod move backward in the circular hole, the spring is compressed, until the sliding seat contacts the limiting column at the rear, then the sliding seat is locked through the locking assembly, when all the sliding seats are locked, the cylindrical test piece is placed on the fixing table according to the requirement, finally, the locking assembly cancels the locking of the sliding seat, the spring restores the deformation, the sliding seat moves forward under the action of the spring, the compression wheel compresses the cylindrical test piece, and the fixing of the cylindrical test piece is completed. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the fixing device for detecting concrete cylinder provided by the utility model, and is a top view.

[0012] Figure 2 It is the fixing device for detecting concrete cylinder provided by the utility model, and is a whole view.

[0013] Figure 3 It is the clamping assembly provided by the utility model, and is a schematic view.

[0014] Figure 4 It is the locking assembly provided by the utility model, and is a schematic view.

[0015] Figure 5 It is the adjusting screw and silk cover installation schematic view provided by the utility model. DETAILED DESCRIPTION

[0016] In order to make the utility model patent purposes, technical schemes and advantages more clearly, the following will be further described in detail by combining with the drawings and examples.

[0017] In order to explain the technical scheme of the utility model, the following will be explained through specific examples.

[0018] In order to facilitate the description, only the parts related to the utility model embodiments are shown.

[0019] Combining Figures 1-3As shown, the fixing device includes a frustum 1, a fixed platform 2 at the center of the frustum 1, and multiple clamping assemblies evenly arranged around the fixed platform 2. Each clamping assembly includes a base 3, a slide block 4 slidably mounted on the base 3, a connecting block 5 rotatably mounted at the front end of the slide block 4, a pair of pressure rollers 6 rotatably mounted on the connecting block 5, a baffle 7 located on the back of the slide block 4 on the base 3, a circular hole 8 on the baffle 7, a guide rod 9 located on the back of the slide block 4, the guide rod 9 passing through the circular hole 8, and a spring 10 mounted on the guide rod 9, limiting posts 11 located at both the front and rear positions of the slide block 4 on the base 3, and a locking assembly for positioning the slide block 4 on the base 3.

[0020] In the field of concrete material performance testing, the axial compressive strength of cylindrical specimens is considered one of the core evaluation indicators. This device can be used to fix cylindrical specimens for easier testing.

[0021] In the diagram, there are four sets of clamping assemblies, which are evenly distributed on a circular platform. Each clamping assembly includes a base, on which a slide block is slidably mounted, and on the slide block 4 is a push handle 12.

[0022] When using the fixing device to clamp and fix the concrete cylindrical specimen, firstly, push the four slides backward a short distance using the push handle. The slides, along with the guide rods, move backward within the circular holes, compressing the springs until the slides contact the rear limiting post. Then, use the locking assembly to lock the slides, creating clearance space. After all slides are locked, place the cylindrical specimen on the fixing platform as required. Finally, release the locking assembly from the slides, the springs return to their original deformation, and the slides move forward under the spring's action, pressing the pressure rollers against the cylindrical specimen, thus completing the fixing of the cylindrical specimen.

[0023] In the above structure, the limiting posts at the front and rear of the base provide double protection, preventing the slide from sliding off the track below it due to overload. Furthermore, a pair of pressure rollers are rotatably mounted at the front end of the slide via a connecting block, which is also rotatably installed. Under the preload of the springs, the pressure rollers form rolling friction constraints, ensuring axial positioning while reducing surface damage to the cylindrical specimen.

[0024] As a preferred structure, Figures 3-4 The slide block 4 has a limiting hole 13. The locking assembly includes a bracket 14 mounted on the base 3. The bracket 14 has a sleeve 15. The sleeve 15 has a pair of slots 16 on its upper part. The sleeve 15 has a pin 17 inside. The pin 17 has a top cap 18 on its upper part. The lower part of the pin 17 is aligned vertically with the limiting hole 13. The top cap 18 has a pair of locking strips 19 that match the slots 16. The sleeve 15 supports the top cap 18 through the locking strips 19.

[0025] In the diagram, when the sleeve supports the top cap, the locking strip and the slot are arranged in a cross shape. When the slide is moved backward by pushing the handle, and the back of the slide contacts the rear limiting post, the limiting hole and the bottom of the pin are aligned vertically. At this point, the locking assembly can be used to position the slide, and the slide will be fixed in place. Specifically: first, rotate the top cap to align the locking strip with the slot, then slightly lower the top cap, inserting the locking strip into the slot. The bottom of the pin is then inserted into the limiting hole, completing the positioning of the slide. During this process, when the locking strip is inserted into the slot, the sleeve and the top cap form a self-locking mechanism, ensuring a stable and reliable clamping state.

[0026] In this device, Figures 1-2 , Figure 5 Each of the truncated cones 1 has an adjustment groove 20 corresponding to each base 3. The bottom surface of each base 3 is provided with a threaded sleeve 21, which is located in the adjustment groove 20. An adjustment screw 22 is rotatably provided in the adjustment groove 20. The threaded sleeve 21 is installed on the adjustment screw 22. One end of the adjustment screw 22 passes through the truncated cone 1 and is provided with a knob 23.

[0027] In practice, the installation position of the base can be slightly adjusted forward and backward to accommodate cylindrical specimens of different sizes. To adjust the position of the base, simply rotate the adjusting screw. As the screw rotates, the threaded sleeve moves the base along the length of the adjusting screw until it reaches the desired position.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixture for use in the testing of concrete cylinders, characterized by: The fixing device comprises a circular table, a fixing table is arranged at the center of the circular table, a plurality of clamping assemblies are uniformly arranged around the fixing table, the clamping assembly comprises a base, a sliding seat is slidably arranged on the base, a connecting block is rotatably arranged at the front end of the sliding seat, a pair of pressing wheels are rotatably arranged on the connecting block, a baffle is arranged on the back of the sliding seat, a circular hole is formed in the baffle, a guide rod is arranged on the back of the sliding seat and penetrates through the circular hole, a spring is arranged on the guide rod, a limiting column is arranged on the base at the front and back positions of the sliding seat, and a locking assembly for positioning the sliding seat is arranged on the base.

2. The apparatus of claim 1, wherein: A limiting hole is formed in the sliding seat, the locking assembly comprises a support arranged on the base, a sleeve is arranged on the support, a pair of clamping grooves are formed above the sleeve, a latch is arranged in the sleeve, a top cap is arranged above the latch, the limiting hole is aligned with the latch, a pair of clamping strips matched with the clamping grooves are formed on the top cap, and the sleeve supports the top cap through the clamping strips.

3. The fixing device for testing concrete cylinders as described in claim 2, characterized in that: An adjusting groove is formed in the circular table corresponding to each base, a silk sleeve is arranged on the bottom surface of the base and located in the adjusting groove, an adjusting screw is rotatably arranged in the adjusting groove, and the silk sleeve is arranged on the adjusting screw.

4. The fixing device for testing a concrete cylinder as described in claim 3, characterized in that: A pushing handle is arranged on the sliding seat.

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