Adjustable gauge length ultra-high performance concrete tensile specimen mold structure

Abstract

The utility model belongs to building material test equipment technical field, concretely relates to adjustable gauge length's ultra high performance concrete tensile specimen mould structure, the utility model discloses through setting telescopic intermediate mould and the sliding fit of upper chord mould, lower chord mould and bottom plate, can conveniently adjust the interval between upper chord mould and lower chord mould, and further realized the flexible adjustment of mould gauge length, can satisfy the preparation demand of different gauge length ultra high performance concrete tensile specimen, need not to change mould, reduced the mould cost, the utility model discloses the bottom plate upper surface is provided with scale ruler, can provide accurate reference in the process of adjusting gauge length, is convenient for operating personnel to adjust gauge length to the required size quickly and accurately, improves the efficiency and accuracy of sample preparation, the utility model discloses the mould overall structure design is reasonable, and convenient operation, easy to manufacture and maintain, has stronger practicality and popularization value.

Description

Technical Field

[0001] This utility model belongs to the technical field of building material testing equipment, specifically relating to an adjustable gauge length ultra-high performance concrete tensile specimen mold structure. Background Technology

[0002] Ultra-high performance concrete (UHPC) is a cement-based composite material characterized by ultra-high strength, high toughness and high durability. It is composed of steel fibers, silica fume and other materials. The particle size distribution is optimized using the maximum bulk density theory. It has the characteristics of low water-cement ratio and no coarse aggregate. Its compressive strength can reach more than 400 MPa.

[0003] Tensile testing is a crucial test in the performance evaluation of ultra-high performance concrete. It provides key performance indicators such as yield strength, tensile strength, and elongation. The quality of the tensile specimen preparation directly affects the accuracy of the test results, with the gauge length being a critical parameter.

[0004] Currently, the gauge length of commonly used ultra-high performance concrete tensile specimen molds is mostly fixed, which makes it difficult to meet the different requirements of different testing standards or specific tests for the gauge length of tensile specimens. Moreover, existing technologies require changing different molds when preparing tensile specimens with different gauge lengths, which not only increases the manufacturing cost of the molds but also reduces the efficiency of specimen preparation. At the same time, improper operation during mold replacement may lead to deviations in specimen dimensions, affecting the reliability of test results. Utility Model Content The technical problem to be solved by this utility model is to provide an adjustable gauge length ultra-high performance concrete tensile specimen mold structure, which is compact, easy to use, and can realize flexible adjustment of the mold gauge length to meet the preparation requirements of tensile specimens with different gauge lengths, and can greatly improve the efficiency and quality of specimen preparation.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: An adjustable gauge length ultra-high performance concrete tensile test specimen mold structure includes an upper chord mold 2 and a lower chord mold 3 symmetrically arranged. The upper chord mold 2 and the lower chord mold 3 are both slidably arranged on the upper surface of the base plate 1, and a telescopic intermediate mold 4 is connected between the upper chord mold 2 and the lower chord mold 3. A scale 5 is provided on the upper surface of the base plate 1 along the telescopic direction of the telescopic intermediate mold 4. The telescopic intermediate mold 4 includes an upper template 10 fixedly connected to the upper chord mold 2 and a lower template 11 fixedly connected to the lower chord mold 3, and the lower template 11 is slidably sleeved on the outside of the upper template 10.

[0006] Preferably, two sliding grooves 6 are symmetrically provided on both sides of the upper chord mold 2 along the telescopic direction of the telescopic intermediate mold 4, and fastening bolts 7 are inserted in each sliding groove 6. The fastening bolts 7 pass through the sliding groove 6 and are screwed into the corresponding screw holes on the upper surface of the base plate 1.

[0007] Preferably, two sliding grooves 8 are symmetrically opened on both sides of the lower chord mold 3 along the telescopic direction of the telescopic intermediate mold 4, and fastening bolts 9 are inserted in each sliding groove 8. The fastening bolts 9 pass through the sliding groove 8 and are screwed into the corresponding screw holes 2 on the upper surface of the base plate 1.

[0008] Preferably, the upper template 10 and the lower template 11 move relative to each other along the telescopic direction of the telescopic intermediate mold 4, and drive the upper chord mold 2 and the lower chord mold 3 to move relative to each other along the upper surface of the base plate 1, so as to adjust the distance between the upper chord mold 2 and the lower chord mold 3.

[0009] Preferably, the upper template 10 has two symmetrical sliding grooves 12 on both sides along the telescopic direction of the telescopic intermediate mold 4, and the lower template 11 has two symmetrical sliding grooves 13 on both sides along the telescopic direction of the telescopic intermediate mold 4 that are adapted to the sliding grooves 12. A fastening nut 14 is provided between the sliding grooves 12 and 13 on the same side to fix the relative position of the upper template 10 and the lower template 11.

[0010] Preferably, the outer walls on both sides of the upper template 10 and the inner walls on both sides of the lower template 11 are all ground to make the surface roughness lower than a preset value.

[0011] Preferably, the base plate 1 is made of gray cast iron, the upper chord mold 2 and the lower chord mold 3 are made of chromium alloy tool steel, and the upper template 10 and the lower template 11 are made of carbon structural steel, in order to meet the requirements for preparing ultra-high performance concrete tensile specimens.

[0012] Preferably, the fastening bolt 7, the fastening bolt 9, and the fastening nut 14 are all made of alloy structural steel.

[0013] Compared with the prior art, the present invention has the following main advantages: 1. This utility model, by setting a telescopic intermediate mold and the sliding fit between the upper chord mold, the lower chord mold and the base plate, can conveniently adjust the distance between the upper chord mold and the lower chord mold, thereby realizing the flexible adjustment of the mold gauge length. It can meet the preparation requirements of ultra-high performance concrete tensile specimens with different gauge lengths, without the need to replace the mold, thus reducing the mold cost.

[0014] 2. The base plate of this utility model is provided with a graduated scale on its upper surface, which can provide a precise reference during the adjustment of the gauge length, making it easy for operators to quickly and accurately adjust the gauge length to the required size, thereby improving the efficiency and accuracy of sample preparation.

[0015] 3. The upper and lower chord molds of this utility model are fixed to the base plate by fastening bolt one and fastening bolt two, respectively. The upper and lower templates of the telescopic intermediate mold are fixed by fastening nuts. The fixing method is simple and reliable, which can ensure the stability of the mold structure during the sample preparation process, avoid deviations in sample size due to mold loosening, and improve the reliability of test results.

[0016] 4. The mold of this utility model has a reasonable overall structure design, is easy to operate, easy to manufacture and maintain, and has strong practicality and promotion value. Attached Figure Description

[0017] Figure 1 This is a plan view of the tensile specimen mold structure in an embodiment of this utility model; Figure 2 This is a schematic diagram of the telescopic intermediate mold in an embodiment of this utility model.

[0018] In the diagram: 1-base plate; 2-upper chord mold; 3-lower chord mold; 4-telescopic intermediate mold; 5-scale ruler; 6-slide groove one; 7-fastening bolt one; 8-slide groove two; 9-fastening bolt two; 10-upper template; 11-lower template; 12-slide groove three; 13-slide groove four; 14-fastening nut. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0024] Example 1: This example provides an adjustable gauge length ultra-high performance concrete tensile specimen mold structure, such as... Figures 1-2 As shown, it mainly includes: base plate 1, upper chord mold 2, lower chord mold 3, telescopic intermediate mold 4, and scale ruler 5; The upper chord mold 2 and the lower chord mold 3 are both slidably disposed on the upper surface of the base plate 1, and a telescopic intermediate mold 4 is connected between the upper chord mold 2 and the lower chord mold 3. A scale 5 is provided on the upper surface of the base plate 1 along the telescopic direction of the telescopic intermediate mold 4. The telescopic intermediate mold 4 includes an upper template 10 fixedly connected to the upper chord mold 2 and a lower template 11 fixedly connected to the lower chord mold 3, and the lower template 11 is slidably sleeved on the outside of the upper template 10.

[0025] Furthermore, two sliding grooves 6 are symmetrically provided on both sides of the upper chord mold 2 along the telescopic direction of the telescopic intermediate mold 4, and fastening bolts 7 are inserted in each sliding groove 6. The fastening bolts 7 pass through the sliding groove 6 and are screwed into the corresponding screw holes on the upper surface of the base plate 1.

[0026] Furthermore, two sliding grooves 8 are symmetrically provided on both sides of the lower chord mold 3 along the telescopic direction of the telescopic intermediate mold 4, and fastening bolts 9 are inserted in each sliding groove 8. The fastening bolts 9 pass through the sliding groove 8 and are screwed into the corresponding screw holes 2 on the upper surface of the base plate 1.

[0027] Furthermore, the upper template 10 and the lower template 11 move relative to each other along the telescopic direction of the telescopic intermediate mold 4, and drive the upper chord mold 2 and the lower chord mold 3 to move relative to each other along the upper surface of the base plate 1, so as to adjust the distance between the upper chord mold 2 and the lower chord mold 3.

[0028] Furthermore, two sliding grooves 12 are symmetrically provided on both sides of the upper template 10 along the telescopic direction of the telescopic intermediate mold 4, and two sliding grooves 13 adapted to the sliding grooves 12 are symmetrically provided on both sides of the lower template 11 along the telescopic direction of the telescopic intermediate mold 4. Fastening nuts 14 are provided between the sliding grooves 12 and 13 on the same side to fix the relative positions of the upper template 10 and the lower template 11.

[0029] Furthermore, the outer walls on both sides of the upper template 10 and the inner walls on both sides of the lower template 11 are all ground to make the surface roughness lower than the preset value.

[0030] Furthermore, the base plate 1 is made of gray cast iron, the upper chord mold 2 and the lower chord mold 3 are made of chromium alloy tool steel, and the upper template 10 and the lower template 11 are made of carbon structural steel, in order to meet the requirements for preparing ultra-high performance concrete tensile specimens.

[0031] Furthermore, the fastening bolt 7, fastening bolt 9, and fastening nut 14 are all made of alloy structural steel.

[0032] Example 2: This example provides an adjustable gauge length ultra-high performance concrete tensile test specimen mold structure. The upper chord mold 2 and the lower chord mold 3 are symmetrically arranged and slidably mounted on the upper surface of the base plate 1, with a telescopic intermediate mold 4 connecting them. The upper surface of the base plate 1 is engraved with a scale 5 along the telescopic direction of the telescopic intermediate mold 4, which is used as a dimensional reference for gauge length adjustment. Furthermore, the telescopic intermediate mold 4 is composed of an upper template 10 and a lower template 11. The upper template 10 is fixedly connected to the upper chord mold 2, and the lower template 11 is fixedly connected to the lower chord mold 3. The lower template 11 is slidably sleeved on the outside of the upper template 10 and can move relative to the upper template 10 in the telescopic direction.

[0033] In practical use: First, according to the required gauge length of the specimen, loosen fastening bolt 7, fastening bolt 9, and fastening nut 14. Then, push the upper chord mold 2 and the lower chord mold 3 to move the upper template 10 and the lower template 11 relative to each other. By observing the scale 5, adjust the distance between the upper chord mold 2 and the lower chord mold 3 to the required gauge length. After adjustment, tighten fastening bolt 7, fastening bolt 9, and fastening nut 14 respectively to fix the position of each component. Then, the tensile specimen can be prepared.

[0034] Furthermore, all parts of this application that are not described in detail are the same as or implemented using existing technology.

[0035] In summary: 1. This utility model, by setting a telescopic intermediate mold and the sliding fit between the upper chord mold, the lower chord mold and the base plate, can conveniently adjust the distance between the upper chord mold and the lower chord mold, thereby realizing the flexible adjustment of the mold gauge length. It can meet the preparation requirements of ultra-high performance concrete tensile specimens with different gauge lengths, without the need to replace the mold, thus reducing the mold cost.

[0036] 2. The base plate of this utility model is provided with a graduated scale on its upper surface, which can provide a precise reference during the adjustment of the gauge length, making it easy for operators to quickly and accurately adjust the gauge length to the required size, thereby improving the efficiency and accuracy of sample preparation.

[0037] 3. The upper and lower chord molds of this utility model are fixed to the base plate by fastening bolt one and fastening bolt two, respectively. The upper and lower templates of the telescopic intermediate mold are fixed by fastening nuts. The fixing method is simple and reliable, which can ensure the stability of the mold structure during the sample preparation process, avoid deviations in sample size due to mold loosening, and improve the reliability of test results.

[0038] 4. The mold of this utility model has a reasonable overall structure design, is easy to operate, easy to manufacture and maintain, and has strong practicality and promotion value.

[0039] The above embodiments are only used to illustrate the design concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The protection scope of this utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in this utility model are within the protection scope of this utility model.

Claims

1. A mold structure for an adjustable gauge length ultra-high performance concrete tensile specimen, characterized in that: It includes an upper chord mold (2) and a lower chord mold (3) arranged symmetrically. The upper chord mold (2) and the lower chord mold (3) are both slidably arranged on the upper surface of the base plate (1). A telescopic intermediate mold (4) is connected between the upper chord mold (2) and the lower chord mold (3). A scale (5) is provided on the upper surface of the base plate (1) along the telescopic direction of the telescopic intermediate mold (4). The telescopic intermediate mold (4) includes an upper template (10) fixedly connected to the upper chord mold (2) and a lower template (11) fixedly connected to the lower chord mold (3), and the lower template (11) is slidably sleeved on the outside of the upper template (10).

2. The tensile specimen mold structure according to claim 1, characterized in that: The upper chord mold (2) has two symmetrical sliding grooves (6) on both sides along the telescopic direction of the telescopic intermediate mold (4), and fastening bolts (7) are inserted in the sliding grooves (6). The fastening bolts (7) pass through the sliding grooves (6) and are screwed into the corresponding screw holes on the upper surface of the base plate (1).

3. The tensile specimen mold structure according to claim 2, characterized in that: The lower chord mold (3) has two symmetrical sliding grooves (8) on both sides along the telescopic direction of the telescopic intermediate mold (4), and fastening bolts (9) are inserted in the sliding grooves (8). The fastening bolts (9) pass through the sliding grooves (8) and are screwed into the corresponding screw holes on the upper surface of the base plate (1).

4. The tensile specimen mold structure according to claim 3, characterized in that: The upper template (10) and the lower template (11) move relative to each other along the telescopic direction of the telescopic intermediate template (4), and drive the upper chord template (2) and the lower chord template (3) to move relative to each other along the upper surface of the base plate (1) to adjust the distance between the upper chord template (2) and the lower chord template (3).

5. The tensile specimen mold structure according to claim 4, characterized in that: The upper template (10) has two symmetrical grooves (12) on both sides along the telescopic direction of the telescopic intermediate mold (4). The lower template (11) has two symmetrical grooves (13) on both sides along the telescopic direction of the telescopic intermediate mold (4) that are compatible with the grooves (12). A fastening nut (14) is inserted between the grooves (12) and the grooves (13) on the same side to fix the relative positions of the upper template (10) and the lower template (11).

6. The tensile specimen mold structure according to claim 5, characterized in that: The outer walls on both sides of the upper template (10) and the inner walls on both sides of the lower template (11) are all ground to make the surface roughness lower than the preset value.

7. The tensile specimen mold structure according to claim 1, characterized in that: The base plate (1) is made of gray cast iron, the upper chord mold (2) and the lower chord mold (3) are made of chromium alloy tool steel, and the upper template (10) and the lower template (11) are made of carbon structural steel.

8. The tensile specimen mold structure according to claim 5, characterized in that: The fastening bolt one (7), fastening bolt two (9) and fastening nut (14) are all made of alloy structural steel.

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