Vertical expansion rate tester for grouting material

Abstract

The utility model discloses a vertical expansion rate determinator for grouting material, which relates to the field of vertical expansion rate determination, and comprises a base and a test mold, the middle part of the upper surface of the base is provided with a limit groove, the test mold is located at one end of the inner side of the limit groove, one end of the upper surface of the base is symmetrically provided with two support rods, and the support rods are connected with the limit groove. A cross beam is connected between the two supporting rods, and a dial indicator is installed in the middle of the cross beam. The limiting groove is formed in the base, meanwhile, the sliding assembly is arranged between the test mold and the limiting groove, the test mold can be taken out from the position below the dial indicator in a sliding mode, after grouting is completed, the sliding assembly pushes the test mold to the position under the dial indicator, and the test mold can be rapidly positioned and fixed; furthermore, when grout in the test mold expands irregularly outwards, the test mold cannot move on the base, so that the measurement precision is ensured; and meanwhile, the test mold can be quickly and accurately positioned in the middle under the dial indicator, so that the measurement precision is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical expansion rate measurement, in particular to a vertical expansion rate measuring instrument for grouting materials. Background Art

[0002] Vertical expansion rate measurement is a key indicator for evaluating the volume change of materials (such as grouting materials and concrete) under specific conditions. It is primarily used to ensure the material's stability and ultimate performance during construction. This measurement aims to assess the material's volumetric expansion during the hardening process, ensuring that the material densely fills the space it is placed in, increasing the effective load-bearing surface and thus effectively carrying the load. This is crucial for determining the density and load-bearing capacity of the grouting layer, as well as preventing quality issues such as hollowing.

[0003] However, the existing method of setting up a dial indicator or micrometer to measure the vertical expansion rate has the following defects: first, the grouting in the test mold will expand outward irregularly, which may cause the test mold to move on the base, resulting in inaccurate measurement accuracy of the grouting vertical expansion rate measuring instrument. Second, during the measurement, the test mold is under the micrometer and the micrometer bracket, which is inconvenient to inject grouting material into the test mold. The test mold is taken out to inject grouting material, and then pushed under the micrometer after grouting. This process requires a lot of time to find the exact center point between the micrometer and the test mold, otherwise it may affect the measurement accuracy. Third, when the glass is placed at the open end of the test mold, only a small gap is left on both sides of the open end of the test mold, so it is likely that the grouting material will be scattered during grouting. Utility Model Content

[0004] The purpose of the present utility model is to provide a vertical expansion rate measuring instrument for grouting materials in order to solve the problems mentioned in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a vertical expansion rate measuring instrument for grouting materials, comprising a base and a test mold, wherein a limit groove is provided in the middle of the upper surface of the base, the test mold is located at one end inside the limit groove, two support rods are symmetrically provided at one end of the upper surface of the base, a crossbeam is connected between the two support rods, and a micrometer is installed in the middle of the crossbeam;

[0006] The test mold is an upper open box structure spliced ​​with multiple steel plates, a glass plate is placed in the middle of the upper open end of the test mold, a pad is placed in the middle of the top of the glass plate, and a sliding component is provided between the limit groove and the test mold;

[0007] Wherein, the sliding assembly includes a slide rail fixedly connected to the bottom of the limiting groove, and the bottom of the test mold is slidably connected to the slide rail via a slider.

[0008] As a further solution of the present utility model: The sliding component further includes a fixed seat, the fixed seat is fixedly connected to the bottom end of the limiting groove by bolts, a connecting rod is arranged between the fixed seat and the test mold, and a screwing head is connected to one end of the connecting rod close to the fixed seat.

[0009] As a further solution of the present utility model: The connecting rod is threadedly connected to the fixed seat, and the connecting rod is rotatably connected to the test mold through a bearing.

[0010] As a further solution of the present utility model: A diversion member is arranged at the upper opening end of the test mold.

[0011] As a further solution of the present utility model: The diversion member and the side plate of the test mold are integrally formed, and the diversion member is inclined relative to the test mold.

[0012] As a further solution of the present utility model: The limiting groove is a "U" - shaped structure with one end open.

[0013] As a further solution of the present utility model: When the test mold moves and contacts the closed end of the limiting groove, the dial indicator is located in the middle directly above the test mold.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] By opening a limiting groove on the base and arranging a sliding component between the test mold and the limiting groove, the present utility model can take out the test mold from under the dial indicator by sliding. After grouting is completed, the sliding component can push the test mold to directly below the dial indicator, quickly positioning and fixing the test mold. Thus, when the grout in the test mold expands irregularly outwards, the test mold will not move on the base, ensuring the measurement accuracy; at the same time, it can also quickly and accurately ensure that the test mold is in the middle directly below the dial indicator, further improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front - view structural schematic diagram of the present utility model;

[0017] Figure 2 is of the present utility model Figure 1 the schematic diagram of structure A in

[0018] Figure 3 is the structural schematic diagram of the support mechanism of the present utility model;

[0019] In the figure: 1. Base; 2. Limiting groove; 3. Test mold; 4. Support rod; 5. Beam; 6. Micrometer; 7. Glass plate; 8. Pad; 9. Sliding assembly; 901. Slide rail; 902. Slider; 903. Fixed seat; 904. Connecting rod; 905. Screw head; 10. Guide piece. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 3 When the trolley is in the working state, the trolley 3 is provided with an eccentric shaft 2, and the trolley 3 is provided with an eccentric shaft 2, and the eccentric shaft 3 is provided with an eccentric shaft 3.

[0022] In this embodiment, the existing method of measuring vertical expansion using a dial indicator or micrometer has the following drawbacks: First, the grouting in the test mold will expand outward irregularly, potentially causing the test mold to move on its base, resulting in inaccurate measurement accuracy. Second, during measurement, the test mold is located below the micrometer and its mounting bracket, making it inconvenient to inject grout into the test mold. The test mold must be removed to inject grouting material, and then pushed back under the micrometer after grouting is complete. This process requires considerable time to find the exact center point between the micrometer and the test mold, which can affect measurement accuracy. Therefore, this solution opens a limit groove 2 on the base and sets a sliding component 9 between the test mold 3 and the limit groove 2. The test mold 3 can be taken out from under the micrometer 6 by sliding. After the grouting is completed, the sliding component 9 pushes the test mold 3 to the bottom of the micrometer 6 (that is, the initial position of the test mold 3). The test mold 3 can be quickly positioned and fixed, and then when the grouting in the test mold expands irregularly outward, the test mold will not move on the base, thereby ensuring the measurement accuracy. At the same time, it can also quickly and accurately ensure that the test mold 3 is in the middle directly below the micrometer 6, further improving the measurement accuracy.

[0023] Please refer to Figures 1 to 3 The sliding assembly 9 also includes a fixed seat 903, which is fixedly connected to one end of the bottom of the limiting groove 2 by a bolt. A connecting rod 904 is provided between the fixed seat 903 and the test mold 3, and a screw head 905 is connected to one end of the connecting rod 904 close to the fixed seat 903; the connecting rod 904 and the fixed seat 903 are connected by a threaded connection, and the connecting rod 904 and the test mold 3 are rotatably connected by a bearing.

[0024] In this embodiment, before measuring the vertical expansion rate of the grouting material, the connecting rod 904 is rotated by turning the screw head 905 clockwise. Since the connecting rod 904 is connected to the fixing seat 903 via a threaded connection, the test mold 3 is moved outward by the connecting rod 904 and removed from directly below the dial indicator 6. The grouting material is then poured into the test mold 3. When the grouting material fills half of the space inside the test mold 3, the grouting material is stirred several times with a stick to reduce the air in the grouting material. Then, the glass plate 7 is placed in the middle of the upper opening of the test mold 3, leaving gaps at both ends of the upper opening of the test mold 3. The remaining grouting material is then injected into the test mold 3 through the gaps until the test mold 3 is completely filled. Finally, by turning the screw head 905 counterclockwise to drive the connecting rod 904 to rotate, the test mold 3 is pushed to the three side walls adjacent to the limit groove 2. At this time, the micrometer 6 is located directly above the test mold 3. The position and height of the beam 5 are adjusted so that the detection end of the micrometer 6 can be made to contact the pad 8, and the expansion rate can be measured after different time periods.

[0025] It should be noted that there is an existing lifting and fixing structure between the crossbeam 5 and the two support rods 4. The outer wall of the upper end of the support rod 4 is provided with an external thread, and through holes are provided at both ends of the crossbeam 5. The outer diameter of the through holes is larger than the outer diameter of the upper end of the support rod 4. The upper and lower ends of the connection between the crossbeam 5 and the support rod 4 are fixed and limited by nuts.

[0026] Please refer to Figures 1 to 3 A flow guide 10 is provided at one end of the upper opening of the test mold 3 ; the flow guide 10 and the side plate of the test mold 3 are integrally formed, and the flow guide 10 is inclined relative to the test mold 3 .

[0027] In this embodiment, because existing grouting material vertical expansion rate measuring devices leave only a small gap on both sides of the test mold 3 opening when the glass plate 7 is placed at the test mold opening, grouting material is likely to be scattered during grouting. Therefore, this solution provides a flow guide 10 on a side panel at the test mold opening. The flow guide is arranged at an angle with the test mold 3. Therefore, when the glass plate 7 is placed at the test mold opening, the operator only needs to pour the grouting material into the flow guide 10, and the grouting material flows into the test mold 3 through the flow guide 10, reducing the problem of grouting material spilling and easing the workload of the operator for subsequent cleaning.

[0028] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vertical expansion rate measuring instrument for grouting material, comprising a base (1) and a test mold (3), characterized in that: A limiting groove (2) is formed in the middle of the upper surface of the base (1). The test die (3) is located at one inner end of the limiting groove (2). Two support rods (4) are symmetrically arranged at one end of the upper surface of the base (1). A cross beam (5) is connected between the two support rods (4). A dial indicator (6) is installed in the middle of the cross beam (5). The test die (3) is an upper-opening box structure assembled by multiple steel plates. A glass plate (7) is placed in the middle of the upper-opening end of the test die (3). A backing plate (8) is placed in the middle of the top end of the glass plate (7). A sliding component (9) is arranged between the limiting groove (2) and the test die (3). Among them, the sliding component (9) includes a slide rail (901) fixedly connected to the bottom of the limiting groove (2). The bottom of the test die (3) is slidably connected to the slide rail (901) through a slider (902).

2. A grouting material vertical expansion rate tester according to claim 1, characterized in that: The sliding component (9) further includes a fixed seat (903). The fixed seat (903) is fixedly connected to one bottom end of the limiting groove (2) by bolts. A connecting rod (904) is arranged between the fixed seat (903) and the test die (3). One end of the connecting rod (904) close to the fixed seat (903) is connected with a screwing head (905).

3. A grouting material vertical expansion rate measuring instrument according to claim 2, characterized in that: The connecting rod (904) is threadedly connected with the fixed seat (903), and the connecting rod (904) is rotatably connected with the test die (3) through a bearing.

4. A grouting material vertical expansion rate measuring instrument according to claim 3, characterized in that: A flow guiding member (10) is arranged at one upper-opening end of the test die (3).

5. A grouting material vertical expansion rate measuring instrument according to claim 4, characterized in that: The flow guiding member (10) and the side plate of the test die (3) are integrally formed, and the flow guiding member (10) is inclined with respect to the test die (3).

6. A grouting material vertical expansion rate tester according to claim 1, characterized in that: The limiting groove (2) is a "U"-shaped structure with one end open.

7. A grouting material vertical expansion rate measuring instrument according to claim 6, characterized in that: When the test die (3) moves and contacts the closed end of the limiting groove (2), the dial indicator (6) is located directly above the middle of the test die (3).

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