Aggregate alkali reactivity apparatus

Abstract

The utility model belongs to building material detection device technical field, specifically disclose a kind of aggregate alkali activity length measuring instrument, including support plate, the front of support plate is equipped with first sliding slot, the inside rotationally connected of support plate has threaded rod, the top of threaded rod is fixedly connected with rotating block, the inside sliding connection of first sliding slot has slider, the front of slider is fixedly connected with limit block, the inside of slider is screw thread connection with the outer surface of threaded rod, the utility model uses rotating block to drive threaded rod to rotate, make threaded rod and slider carry out screw thread transmission, make slider slide down in the inside of first sliding slot, drive limit block and dial gauge to move downwards, make the contact of dial gauge bottom end and the top of material contact, then observe the numerical value of dial gauge, make dial gauge zero, make threaded rod drive slider to move, so that different shape's mortar stick can be detected, reduce the use cost of detection device.

Description

Technical Field

[0001] This utility model relates to the technical field of building material testing devices, specifically a material alkali activity measuring instrument. Background Technology

[0002] The alkali-aggregate reactivity length gauge, a core piece of equipment in the field of building material safety testing, is valuable because its core value lies in its ability to scientifically assess the potential safety hazards arising from the expansion effect produced by the chemical reaction between the alkali components in cement and reactive aggregates by precisely tracking changes in the length of cement mortar specimens. If this chemical reaction gets out of control, it can lead to problems such as cracks and reduced strength in concrete structures, and even cause building safety accidents. In the field of building materials, the durability of concrete is paramount. The alkali-aggregate reaction is one of the key factors affecting concrete durability.

[0003] Currently, various methods have been developed in the industry for determining the alkali reactivity of aggregates, such as the petrographic method, mortar bar method, rapid mortar bar method, and concrete prism method. Among them, the rapid mortar bar method is characterized by its short test cycle and reliable results. This method involves preparing mortar specimens with a specific mix ratio and placing them in a high-alkali and high-temperature environment for accelerated curing. Under these conditions, active silica and alkali metal ions rapidly undergo an expansive gel reaction. Researchers determine the hazard level of the aggregate by monitoring the change rate of the specimen length. However, in the practical application of existing technologies, dial gauges generally adopt a fixed design, and their installation position and clamping structure are rigidly fixed, making it impossible to flexibly adjust according to the shape and size characteristics of the mortar bar. When testing mortar bars of different sizes, the fixed dial gauge is difficult to accurately fit with the measurement reference surface of the specimen, resulting in increased measurement error. This design flaw directly leads to the fact that in order to adapt to mortar bars of different specifications, enterprises have to equip themselves with multiple sets of testing devices. Each set of devices can only correspond to specimens of a specific size, which not only occupies a lot of storage space, but also requires additional investment in purchasing special equipment, significantly increasing the equipment procurement cost. Therefore, an aggregate alkali activity length measuring instrument was proposed. Utility Model Content

[0004] The purpose of this invention is to provide a material alkali-active length measuring instrument to solve the problem mentioned in the background art that fixed measuring devices cannot detect materials of different sizes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a material alkali activity measuring instrument, comprising a support plate, a first groove on the front of the support plate, a threaded rod rotatably connected inside the support plate, a rotating block fixedly connected to the top of the threaded rod, a slider slidably connected inside the first groove, a limiting block fixedly connected to the front of the slider, the inside of the slider being threadedly connected to the outer surface of the threaded rod, and the threads on the outer surface of the slider being compatible with the threads on the outer surface of the threaded rod, a dial indicator being fixedly connected inside the limiting block by screws, a third groove on the front of the support plate, a limiting post fixedly connected inside the third groove, fixing blocks slidably connected to the outer surfaces of both ends of the limiting post, a second spring fixedly connected to the opposite ends of the two fixing blocks, a second spring fixedly connected to the end of the second spring away from the fixing block, and the end of the second spring away from the fixing block being fixedly connected to the inner wall of the third groove, and clamping blocks fixedly connected to the upper surfaces of the two fixing blocks.

[0006] Preferably, a limiting plate is fixedly connected to the front of the support plate, and a second sliding groove is provided inside the limiting plate.

[0007] Preferably, a locking block is slidably connected inside the second groove, and a first spring is sleeved on the outer surface of the locking block.

[0008] Preferably, the two ends of the first spring are fixedly connected to one end of the locking block and the inner wall of the second slide groove, respectively.

[0009] Preferably, the limiting plate is internally threaded with a stud, one end of which contacts the surface of the locking block.

[0010] Preferably, the limiting plate has a top post inside, and the surface of the top post has a slot, the surface of the slot being in contact with one end of the block.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In use, this aggregate alkali reactivity length measuring instrument utilizes a rotating block to drive a threaded rod to rotate, causing the threaded rod to engage with the slider via a threaded transmission. This allows the slider to slide downwards inside the first groove, moving the limit block and dial indicator downwards. The bottom contact of the dial indicator then contacts the top of the material, allowing observation of the dial indicator reading. Once the dial indicator is zeroed, the threaded rod drives the slider to move, facilitating the testing of mortar bars of different shapes and reducing the operating cost of the testing device.

[0013] 2. In use, this aggregate alkali activity length measuring instrument works by rotating the stud, which moves the stud out of the second slide groove, resetting the first spring which was originally compressed, and pushing the locking block to the right. Then, a top post with the required accuracy is inserted into the limiting plate, with the locking groove facing one side of the locking block. The stud is then tightened, causing it to push the locking block to slide inside the second slide groove, compressing the first spring, and making one end of the locking block in close contact with the surface of the locking groove. This limits and fixes the top post, ensuring its installation position and allowing for quick replacement of the top post. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a material alkali activity measuring instrument according to the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the limiting plate of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the second slide groove of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the card block of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the limiting block of this utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the clamping block of this utility model.

[0020] In the diagram: 1. Support plate; 2. Limiting plate; 3. Top column; 4. Clamping block; 5. Limiting block; 6. First slide groove; 7. Threaded rod; 8. Dial indicator; 9. Rotating block; 10. Stud; 11. Sliding block; 12. Slot; 13. Second slide groove; 14. Clamping block; 15. First spring; 16. Limiting column; 17. Second spring; 18. Fixing block; 19. Third slide groove. Detailed Implementation

[0021] Please see Figure 1-6This utility model provides a technical solution: a material alkali activity measuring instrument, including a support plate 1. A first groove 6 is formed on the front of the support plate 1. A threaded rod 7 is rotatably connected inside the support plate 1. A rotating block 9 is fixedly connected to the top of the threaded rod 7, which drives the threaded rod 7 to rotate. A slider 11 is slidably connected inside the first groove 6, which limits the position of the slider 11. A limiting block 5 is fixedly connected to the front of the slider 11. The inside of the slider 11 is threadedly connected to the outer surface of the threaded rod 7, and the threads on the outer surface of the slider 11 are compatible with the threads on the outer surface of the threaded rod 7. The slider 11 limits and fixes the position of the limiting block 5. Furthermore, the threaded rod 7 and the slider 11 are driven by a threaded transmission, allowing the slider 11 to move. The function of the limiting block 5 is as follows: a dial indicator 8 is fixedly connected to the inside of the limiting block 5 by screws; a third slide groove 19 is opened on the front of the support plate 1; a limiting post 16 is fixedly connected inside the third slide groove 19; a fixing block 18 is slidably connected to the outer surfaces of both ends of the limiting post 16; the limiting post 16 is used to limit the position of the fixing block 18; a second spring 17 is fixedly connected to the opposite ends of the two fixing blocks 18; a second spring 17 is fixedly connected to the end of the second spring 17 away from the fixing block 18; the end of the second spring 17 away from the fixing block 18 is fixedly connected to the inner wall of the third slide groove 19; the second spring 17 is used to push the fixing block 18 to the middle position; a clamping block 4 is fixedly connected to the upper surface of the two fixing blocks 18; the clamping block 4 is used to clamp the material.

[0022] Among them, the front of the support plate 1 is fixedly connected to the limiting plate 2, and the limiting plate 2 has a second sliding groove 13 inside. The support plate 1 is used to limit and fix the position of the limiting plate 2.

[0023] The second slide groove 13 has a sliding connection to a locking block 14 inside. The outer surface of the locking block 14 is fitted with a first spring 15, which pushes the locking block 14 to move.

[0024] The two ends of the first spring 15 are fixedly connected to one end of the locking block 14 and the inner wall of the second slide groove 13, respectively. The second slide groove 13 is used to limit the position of the locking block 14.

[0025] The limiting plate 2 has a threaded connection to a stud 10. One end of the stud 10 contacts the surface of the locking block 14. The stud 10 is used to push the locking block 14 to limit and fix the top post 3.

[0026] The limiting plate 2 has a top post 3 inside, and the surface of the top post 3 has a slot 12. The surface of the slot 12 contacts one end of the block 14. The block 14 is used to engage the slot 12 and limit and fix the top post 3.

[0027] Working principle: In use, firstly, rotate the stud 10 to move it out of the second slide groove 13, causing the first spring 15, which was originally compressed, to return to its original state. This pushes the locking block 14 to move to the right. Then, insert the top post 3, which meets the required precision, into the limiting plate 2, with the locking groove 12 facing the locking block 14. Then, tighten the stud 10, causing it to push the locking block 14 to slide inside the second slide groove 13, compressing the first spring 15. This ensures that one end of the locking block 14 is in close contact with the surface of the locking groove 12, limiting and fixing the top post 3 to ensure its installation position. Then, place the standard rod between the two clamping blocks 4, so that the material contacts the inclined surface of the upper surface of the two clamping blocks 4, causing the material to be clamped... Block 4 and fixed block 18 slide inside the third slide groove 19, moving to both sides to compress the second spring 17, so that the two clamping blocks 4 clamp and fix the material, so that one end of the material contacts the top of the top column 3. Then, rotate the rotating block 9, which drives the threaded rod 7 to rotate, so that the threaded rod 7 and the slider 11 are threadedly driven, so that the slider 11 slides downward inside the first slide groove 6, driving the limit block 5 and dial indicator 8 to move downward, so that the contact at the bottom of the dial indicator 8 contacts the top of the material. Then observe the value of the dial indicator 8, zero the dial indicator 8, then remove the standard rod, place the material to be tested, observe the change of the value of the dial indicator 8, and record it to complete the test of the material.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A material alkali reactivity length measuring instrument, comprising a support plate (1), characterized in that: The support plate (1) has a first groove (6) on its front side. A threaded rod (7) is rotatably connected inside the support plate (1). A rotating block (9) is fixedly connected to the top of the threaded rod (7). A slider (11) is slidably connected inside the first groove (6). A limiting block (5) is fixedly connected to the front side of the slider (11). The inside of the slider (11) is threadedly connected to the outer surface of the threaded rod (7), and the thread on the outer surface of the slider (11) is compatible with the thread on the outer surface of the threaded rod (7). A dial indicator (8) is fixedly connected inside the limiting block (5) by screws. The support plate (1) A third slide groove (19) is provided on the front side. A limiting post (16) is fixedly connected inside the third slide groove (19). A fixing block (18) is slidably connected to the outer surfaces of both ends of the limiting post (16). A second spring (17) is fixedly connected to the opposite ends of the two fixing blocks (18). A second spring (17) is fixedly connected to the end of the second spring (17) away from the fixing block (18). The end of the second spring (17) away from the fixing block (18) is fixedly connected to the inner wall of the third slide groove (19). A clamping block (4) is fixedly connected to the upper surface of the two fixing blocks (18).

2. The aggregate alkali activity length measuring instrument according to claim 1, characterized in that: The front of the support plate (1) is fixedly connected to a limiting plate (2), and a second sliding groove (13) is provided inside the limiting plate (2).

3. The aggregate alkali activity length measuring instrument according to claim 2, characterized in that: The second slide groove (13) is slidably connected to a locking block (14), and a first spring (15) is sleeved on the outer surface of the locking block (14).

4. The aggregate alkali activity measuring instrument according to claim 3, characterized in that: The two ends of the first spring (15) are fixedly connected to one end of the locking block (14) and the inner wall of the second slide groove (13), respectively.

5. The aggregate alkali activity length measuring instrument according to claim 2, characterized in that: The limiting plate (2) is internally threaded with a stud (10), one end of which is in contact with the surface of the locking block (14).

6. The aggregate alkali activity length measuring instrument according to claim 2, characterized in that: The limiting plate (2) has a top post (3) inside, and a slot (12) is opened on the surface of the top post (3). The surface of the slot (12) is in contact with one end of the block (14).

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