Pressure head for force value calibration of consolidometer

Abstract

The utility model discloses a pressure head for calibrating a force value of a consolidometer, which relates to the technical field of civil engineering test equipment and comprises a convex spherical surface and a connecting part, and the convex spherical surface is used for extending into a concave spherical surface of a consolidometer pressing cap and is attached to the concave spherical surface of the consolidometer pressing cap; the connecting part is used for being fixedly connected with the bottom of the convex spherical surface, and the connecting part is used for being detachably and fixedly connected with the dynamometer, so that the structure is simple, the use is convenient, and the detection accuracy and reliability are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering testing equipment technology, and in particular to a pressure head for calibrating the force value of a consolidation apparatus. Background Technology

[0002] Consolidation apparatuses are used in geotechnical engineering testing to determine the compressibility of soil, and the accuracy of their force values ​​directly affects the reliability of experimental data. In existing technologies, the contact between the force gauge and the pressure cap of the consolidation apparatus's pressure frame is mostly a combination of a flat surface and a concave spherical surface. Due to the imperfect fit of the geometry, uneven force distribution can easily occur, affecting the accuracy of the calibration results. Utility Model Content

[0003] The purpose of this invention is to provide a pressure head for force calibration of a consolidation apparatus, which solves the problems existing in the prior art. It has a simple structure, is easy to use, and effectively improves the accuracy and reliability of the test.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a pressure head for calibrating the force value of a consolidation apparatus, comprising: a convex spherical surface and a connecting part, wherein the convex spherical surface is used to extend into the concave spherical surface of the consolidation apparatus pressure cap and is fitted to the concave spherical surface of the consolidation apparatus pressure cap; the connecting part is used to be fixedly connected to the bottom of the convex spherical surface, and the connecting part is used to be detachably fixedly connected to the force measuring instrument.

[0006] Preferably, the connecting part is a threaded interface, which is used to connect to the threaded hole on the top of the force gauge.

[0007] Preferably, it also includes a wrench portion, which is disposed between the convex spherical surface and the threaded interface for use with a wrench.

[0008] Preferably, the outer periphery of the wrench portion has a regular hexagonal structure.

[0009] Preferably, it further includes a first connecting post and a second connecting post, wherein the first connecting post is used to integrally connect the convex spherical surface and the wrench portion, and the second connecting post is used to integrally connect the wrench portion and the threaded interface.

[0010] Preferably, the radius of the convex spherical surface is 6.5 mm, the diameter of the first connecting post is 13 mm, the length of the first connecting post is 6.5 mm, the width of the wrench part is 22 mm, the length of the wrench part is 5 mm, the diameter of the second connecting post is 10 mm, the diameter of the threaded interface is 13 mm, and the length of the threaded interface is 6.5 mm.

[0011] The present invention achieves the following technical advantages over the prior art:

[0012] The purpose of this invention is to provide a pressure head for calibrating the force value of a consolidation apparatus. By connecting the connecting part to the top of the force measuring instrument, the convex spherical surface can accurately match the concave spherical surface of the pressure cap of the consolidation apparatus, ensuring that the two contact surfaces can achieve full and uniform contact when force is applied, reducing edge effects, improving the consistency and accuracy of force value transmission, with a simple structure, convenient use, and effectively improving the accuracy and reliability of detection. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A front view of the pressure head for force calibration of the consolidation apparatus provided by this utility model;

[0015] Figure 2 for Figure 1 Top view;

[0016] In the diagram: 1. Convex spherical surface; 2. Threaded interface; 3. Wrench part; 4. First connecting post; 5. Second connecting post. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The purpose of this invention is to provide a pressure head for force calibration of a consolidation apparatus, which solves the problems existing in the prior art. It has a simple structure, is easy to use, and effectively improves the accuracy and reliability of the test.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] This utility model provides a pressure head for calibrating the force value of a consolidation apparatus, such as... Figures 1-2As shown, it includes: a convex spherical surface 1 and a connecting part. The convex spherical surface 1 is used to extend into the concave spherical surface of the consolidation apparatus cap and fits against the concave spherical surface of the consolidation apparatus cap. The connecting part is used to be fixedly connected to the bottom of the convex spherical surface 1 and to be detachably fixedly connected to the force measuring instrument. By connecting the connecting part to the top of the force measuring instrument, the convex spherical surface 1 can accurately match the concave spherical surface of the consolidation apparatus cap, ensuring that the two contact surfaces can achieve full and uniform fit when force is applied, reducing edge effects, improving the consistency and accuracy of force transmission, with a simple structure, convenient use, and effectively improving the accuracy and reliability of detection.

[0021] In a preferred embodiment, the connecting part is a threaded interface 2, which is used to connect to the threaded hole on the top of the force measuring instrument. The threaded interface 2 is compatible with the threaded interface 2 of the force measuring instrument, which facilitates quick installation onto the force measuring instrument.

[0022] In a preferred embodiment, the pressure head for calibrating the force value of the consolidation instrument further includes a wrench part 3, which is disposed between the convex spherical surface 1 and the threaded interface 2 for use with a wrench. The structure is simple, convenient for use with a wrench, and effectively ensures the firmness of the connection between the threaded interface 2 and the force measuring instrument.

[0023] In a preferred embodiment, the outer periphery of the wrench portion 3 has a regular hexagonal structure, which is simple in structure and convenient to use with commonly used handles.

[0024] In a preferred embodiment, the pressure head for calibrating the force value of the consolidation apparatus further includes a first connecting post 4 and a second connecting post 5. The first connecting post 4 is used to integrally connect the convex spherical surface 1 and the wrench part 3, and the second connecting post 5 is used to integrally connect the wrench part 3 and the threaded interface 2.

[0025] In a preferred embodiment, the radius of the convex spherical surface 1 is 6.5 mm, the diameter of the first connecting post 4 is 13 mm, the length of the first connecting post 4 is 6.5 mm, the width of the wrench part 3 is 22 mm, the length of the wrench part 3 is 5 mm, the diameter of the second connecting post 5 is 10 mm, the diameter of the threaded interface 2 is 13 mm, and the length of the threaded interface 2 is 6.5 mm.

[0026] Usage procedure: Confirm that the force gauge is in the off state, tighten the convex spherical head 1 to the corresponding position of the force gauge through the threaded interface 2 until the specified torque is reached, and ensure that the connection is secure;

[0027] Use a special tool to check the seal between the pressure head and the pressure cap. If necessary, slightly adjust the position of the pressure head to achieve the best fit.

[0028] Currently, the company has about 100 consolidation instruments in various units. If the calibration cost is 500 yuan per instrument, this method can save 50,000 yuan in external calibration costs.

[0029] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pressure head for calibrating the force value of a consolidation apparatus, characterized in that: include: A convex spherical surface is used to extend into the concave spherical surface of the consolidation apparatus cap and is fitted to fit the concave spherical surface of the consolidation apparatus cap. as well as A connecting part is provided for fixed connection to the bottom of the convex spherical surface and for detachably fixed connection to the force measuring instrument.

2. The pressure head for force calibration of the consolidation apparatus according to claim 1, characterized in that: The connecting part is a threaded interface, which is used to connect to the threaded hole on the top of the force measuring instrument.

3. The pressure head for force calibration of the consolidation apparatus according to claim 2, characterized in that: It also includes a wrench portion, which is disposed between the convex spherical surface and the threaded interface for use with a wrench.

4. The pressure head for force calibration of the consolidation apparatus according to claim 3, characterized in that: The outer periphery of the wrench part has a regular hexagonal structure.

5. The pressure head for force calibration of the consolidation apparatus according to claim 4, characterized in that: It also includes a first connecting post and a second connecting post, the first connecting post being used to integrally connect the convex spherical surface and the wrench part, and the second connecting post being used to integrally connect the wrench part and the threaded interface.

6. The pressure head for force calibration of the consolidation apparatus according to claim 5, characterized in that: The radius of the convex spherical surface is 6.5 mm, the diameter of the first connecting post is 13 mm, the length of the first connecting post is 6.5 mm, the width of the wrench part is 22 mm, the length of the wrench part is 5 mm, the diameter of the second connecting post is 10 mm, the diameter of the threaded interface is 13 mm, and the length of the threaded interface is 6.5 mm.

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