Node efficiency clamp

Abstract

The utility model relates to a node efficiency clamp, which comprises a back plate, two fixing structures and a power device, the two fixing structures are detachably connected to the back plate and are transversely arranged, the power device drives the back plate to move, each fixing structure comprises two pressing blocks which are oppositely arranged and are detachably connected, and a transverse rib connected with a node is located between the two pressing blocks. During use, the node is positioned in the gap between the two fixing structures, so that the clamp for clamping the grating leaves the node position, the two pressing blocks are connected to clamp the transverse rib, and at the moment, due to the arrangement of the pressing blocks between the transverse rib and the back plate, a gap is formed between the node and the back plate, so that the transverse rib is clamped. Therefore, the situation that the numerical value is too large due to friction between the node and the rear fixing plate in the testing process is avoided, and the accuracy of a testing result is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of geogrids, in particular to the technical field of geogrid testing, and specifically refers to a node efficiency fixture. Background Art

[0002] Nodes are the physical, mechanical or molecular connection points between the longitudinal and transverse reinforcements of geogrids, which constrain the grid structure to provide dimensional stability and load transfer.

[0003] Node efficiency: the ratio of node strength to rib strength, expressed in %.

[0004] Node efficiency reflects the ability of the node to transmit load. If the node is not strong enough, no matter how high the rib strength is, it will be meaningless. The reinforced soil structure will lose its due stability due to the weak point of the node.

[0005] The test method standard is the Geotechnical Research Institute (GRI) system of the United States, but there is no corresponding fixture under the existing technology. Wedge-shaped fixtures are still used, but their jaws are too narrow and the friction surface is continuous, which cannot leave room for node positions, making it impossible to meet the requirements of testing the efficiency index of the biaxial tensile node of plastic grids. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a node efficiency clamp, which uses fixed structures located on both sides of the node to clamp the transverse reinforcement, thereby leaving the node position vacant, thereby meeting the requirements for testing the bidirectional tension node efficiency index of the plastic grating.

[0007] The utility model is realized through the following technical scheme: a node efficiency clamp, comprising a back plate, two fixed structures detachably connected to the back plate and arranged laterally, and a power device for driving the back plate to move, wherein the node is located in a gap between the two fixed structures, the fixed structure comprises two pressure blocks which are relatively arranged and detachably connected, and a transverse rib connected to the node is located between the two pressure blocks.

[0008] When the utility model is in use, the node is located in the gap between the two fixed structures, so the clamp for clamping the grid leaves the node position vacant, and at the same time the two pressing blocks are connected, thereby completing the clamping of the transverse ribs. At this time, due to the setting of the pressing block between the transverse ribs and the back plate, a gap exists between the node back plate, thereby avoiding the situation in which the value is too large due to the friction between the node and the rear fixed plate during the test, thereby ensuring the accuracy of the test results.

[0009] Preferably, friction lines are provided on the inner side surfaces of the two pressing block extruded transverse ribs.

[0010] In this preferred solution, by setting the friction lines, both opposite sides of the transverse ribs are squeezed by the friction lines, thereby increasing the friction force and ensuring the fixing strength of the transverse ribs.

[0011] Preferably, the power device includes a telescopic rod, a top plate fixedly connected to the telescopic rod, and the back plate located below the top plate and fixedly connected to the top plate.

[0012] This preferred solution facilitates the movement of the back plate by arranging the telescopic rod and the top rod, thereby completing the test.

[0013] Preferably, the fixing structure further comprises bolts which penetrate the two pressing blocks in sequence, and nuts which are threadedly connected to the bolts. There are two bolts, which are arranged longitudinally, and the transverse rib is located between the two bolts.

[0014] This preferred solution facilitates the disassembly and assembly of the two pressing blocks through the provision of bolts and nuts, and also ensures the extrusion strength of the transverse ribs.

[0015] Preferably, the bolt passes through the back plate and is fastened by the nut.

[0016] The configuration of this preferred solution facilitates the use of bolts to connect the two fixing plates and the back plate, thereby ensuring the connection between the fixing structure and the back plate while ensuring the connection between the two pressing blocks.

[0017] Preferably, the pressing block is provided with a long hole through which a bolt passes and extends laterally.

[0018] This preferred solution facilitates the adjustment of the position of the pressing block by providing the long holes, thereby adapting to different grid tests.

[0019] The beneficial effects of the utility model are as follows: the node is located in the gap between the two fixed structures, so the clamp for clamping the grid leaves the node position vacant, and at the same time the two pressing blocks are connected, thereby completing the clamping of the transverse ribs. At this time, due to the setting of the pressing block between the transverse ribs and the back plate, there is a gap between the node back plate, thereby avoiding the situation in which the value is too large due to the friction between the node and the rear fixed plate during the test, thereby ensuring the accuracy of the test results; through the setting of the friction pattern, the opposite sides of the transverse ribs are squeezed by the friction pattern, thereby ensuring the fixing strength of the transverse ribs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0021] Figure 2 It is a side view schematic diagram of the utility model;

[0022] Figure 3 Schematic diagram of friction pattern;

[0023] As shown in the figure:

[0024] 1. Node, 2. Pressure block, 3. Back plate, 4. Top plate, 5. Bolts, 6. Nuts, 7. Long hole, 8. Telescopic rod. DETAILED DESCRIPTION

[0025] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0026] Refer to the attached Figure 1-3 The utility model discloses a node efficiency clamp, wherein the node refers to the physical, mechanical or molecular connection point between the longitudinal reinforcement and the transverse reinforcement of the geogrid, and the clamp comprises a back plate 3, two fixed structures detachably connected to the back plate 3 and arranged laterally, and a power device for driving the back plate 3 to move, wherein the node is located in the gap between the two fixed structures, and the fixed structure comprises two pressing blocks 2 which are arranged relatively and detachably connected, and the transverse reinforcement connected to the node is located between the two pressing blocks 2, and friction lines are arranged on the inner side surfaces of the two pressing blocks 2 for squeezing the transverse reinforcement.

[0027] The fixing structure also includes a bolt 5 that passes through the two pressing blocks 2 in sequence, and a nut 6 that is threadedly connected to the bolt 5. The bolt 5 extends along the arrangement direction of the two pressing blocks 2. The pressing blocks 2 are provided with a long hole 7 that the bolt 5 passes through and extends laterally.

[0028] There are two bolts 5 , which are arranged in the longitudinal direction, and the transverse rib is located between the two bolts 5 . The bolts 5 pass through the back plate 3 and are fastened by the nuts 6 .

[0029] The power device includes a telescopic rod 8, a top plate 4 fixedly connected to the telescopic rod 8, and the back plate 3 located below the top plate 4 and fixedly connected to the top plate 4, and the node is located on the extension line of the axis of the telescopic rod 8.

[0030] When the utility model is in use, two pressing blocks 2 are used to clamp the transverse ribs, and the node is located between the two pressing blocks 2, and then the two pressing blocks 2 and the back plate 3 are fixed by bolts 5 and nuts 6, and finally the grille is stretched by extending and retracting the telescopic rod 8.

[0031] Since the node is located in the gap between the two fixed structures, the clamps for clamping the grid leave the node position vacant, and the two pressure blocks 2 are connected at the same time, so as to complete the clamping of the transverse ribs. At this time, due to the setting of the pressure block 2 located between the transverse ribs and the back plate 3, there is a gap between the node back plate 3, thereby avoiding the situation where the value is too large due to the friction between the node and the rear fixed plate during the test, thereby ensuring the accuracy of the test results. Of course, the above description is not limited to the above examples. The technical features not described in the present utility model can be realized by or using the existing technology, which will not be repeated here; the above embodiments and drawings are only used to illustrate the technical solution of the present utility model and are not limitations of the present utility model. The present utility model is described in detail with reference to the preferred implementation mode. Those of ordinary skill in the art should understand that the changes, modifications, additions or substitutions made by those of ordinary skill in the art within the substantial scope of the present utility model do not deviate from the purpose of the present utility model, and should also fall within the scope of protection of the claims of the present utility model.

Claims

1. A node efficiency fixture, characterized by: The invention comprises a back plate (3), two fixed structures which are detachably connected to the back plate (3) and arranged transversely, and a power device for driving the back plate (3) to move, wherein the node is located in a gap between the two fixed structures, the fixed structure comprises two pressing blocks (2) which are arranged opposite to each other and detachably connected, and a transverse rib connected to the node is located between the two pressing blocks (2).

2. The node efficiency fixture according to claim 1, characterized in that: Friction lines are provided on the inner side surfaces of the two pressing blocks (2) for extruding the transverse ribs.

3. The node efficiency fixture according to claim 1, characterized in that: The power device comprises a telescopic rod (8), a top plate (4) fixedly connected to the telescopic rod (8), and the back plate (3) located below the top plate (4) and fixedly connected to the top plate (4).

4. The node efficiency fixture according to claim 3, characterized in that: The fixing structure further comprises a bolt (5) which passes through the two pressing blocks (2) in sequence, and a nut (6) which is threadedly connected to the bolt (5), wherein two bolts (5) are provided, the two bolts (5) are arranged in the longitudinal direction, and the transverse rib is located between the two bolts (5).

5. The node efficiency fixture according to claim 4, characterized in that: The bolt (5) passes through the back plate (3) and is fastened by the nut (6).

6. The node efficiency fixture according to claim 4, characterized in that: The pressing block (2) is provided with a long hole (7) through which the bolt (5) passes and which extends transversely.

Images