Alkali residue cement limestone soil test piece strength testing device

Abstract

The utility model discloses an alkaline residue cement limestone soil test piece strength testing device, including: main body unit and positioning mechanism, main body unit includes testboard and pressurizing subassembly, the upper end of testboard is fixedly equipped with lower steel plate, the positioning mechanism includes No. 1 straight tube and No. 2 straight tube, the first straight cylinder is fixedly connected to the lower end of the test bench, and the second straight cylinder is fixedly connected to the lower end of the first straight cylinder. The beneficial effects are that the push plate is driven to move relatively through the arrangement of the driving motor, the bidirectional screw rod and the screw rod sleeve, and the clamping plate is driven to move relatively through the push plate and the fixing block; through the arrangement of the two groups of clamping plates, the test piece is located in the middle position in the front-back direction and the left-right direction, so that the test piece is accurately positioned, the pressurization center coincides with the center of the test piece, uneven deformation and damage caused by eccentric force when the test piece is stressed are avoided, and then the accuracy of a test result is improved.

Description

Technical Field

[0001] This utility model relates to the field of cement-lime-soil testing technology, and in particular to a strength testing device for alkali slag cement-lime-soil specimens. Background Technology

[0002] Alkali slag cement lime soil is a material made of alkali slag, cement, lime and soil. It is widely used in construction engineering, especially in foundation reinforcement, soil treatment and roadbed treatment. The strength of alkali slag cement lime soil determines the performance of the foundation and roadbed.

[0003] Although existing compression testing machines can be used to test the strength of alkali-slag cement-lime-soil specimens, they suffer from insufficient positioning mechanisms during the testing process. Specifically, current testing methods cannot accurately position the specimen, resulting in a misalignment between the pressure center and the specimen center. Consequently, during testing, the specimen is not under axial compression but rather subjected to eccentric forces. These eccentric forces can lead to uneven deformation and failure of the specimen under stress, thus affecting the accuracy of the test results.

[0004] Therefore, a strength testing device for alkali slag cement lime-soil specimens is needed to solve the above problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the problems of the above-mentioned strength testing device for alkali slag cement lime soil specimens, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a strength testing device for alkali slag cement lime-soil specimens, which is used to solve the problem that "during the test, the specimen is not under axial compression, but is affected by eccentric force. This eccentric force may cause uneven deformation and damage to the specimen under stress, thus affecting the accuracy of the test results."

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a strength testing device for alkali slag cement lime-soil specimens, comprising:

[0009] The main unit includes a test bench and a pressurization assembly, and a lower steel plate is fixedly installed on the upper end of the test bench;

[0010] The positioning mechanism includes a first straight cylinder and a second straight cylinder. The first straight cylinder is fixedly connected to the lower end of the test platform, and the second straight cylinder is fixedly connected to the lower end of the first straight cylinder. A drive motor is fixedly connected to one end of each of the first and second straight cylinders. The output end of each drive motor passes through the first and second straight cylinders and is fixedly connected to a bidirectional lead screw. Each bidirectional lead screw has two opposite threads. Two lead screw sleeves are meshed with each bidirectional lead screw. A push plate is fixedly connected to the upper end of each lead screw sleeve. Two fixing blocks are fixedly connected to the opposite side of each push plate. A clamping plate is fixedly connected to the opposite ends of every two fixing blocks.

[0011] As a preferred embodiment of the strength testing device for alkali slag cement lime soil specimens described in this utility model, wherein: two No. 1 through holes are symmetrically opened at the upper ends of the No. 1 straight cylinder and the No. 2 straight cylinder, and multiple No. 2 through holes are symmetrically opened on the testing platform, and one end of each of the multiple push plates passes through the No. 1 through hole and the No. 2 through hole and is slidably connected in the No. 1 through hole and the No. 2 through hole.

[0012] As a preferred embodiment of the strength testing device for alkali slag cement lime soil specimens described in this utility model, the pressure assembly includes a vertical plate, which is fixedly connected to the upper end of the test platform. A fixing plate is fixedly connected to one side of the test platform. A hydraulic telescopic rod is fixedly embedded in the inner wall of the fixing plate, and an upper steel plate is fixedly connected to the telescopic end of the hydraulic telescopic rod.

[0013] In a preferred embodiment of the strength testing device for alkali slag cement lime soil specimens described in this utility model, a pressure sensor is fixedly installed at the lower end of the upper steel plate, and a controller is fixedly installed on the front side of the vertical plate. The pressure sensor and the controller are connected by an electrical signal.

[0014] In a preferred embodiment of the strength testing device for alkali slag cement lime soil specimens described in this utility model, the two bidirectional screws are rotatably connected to the inner walls of the first and second straight cylinders, respectively, at one end away from the drive motor.

[0015] In a preferred embodiment of the strength testing device for alkali slag cement lime soil specimens described in this utility model, multiple support legs are symmetrically fixedly installed at the lower end of the test platform, and a reinforcing beam is fixedly connected between every two support legs.

[0016] The beneficial effects of this utility model are:

[0017] The push plate is moved relative to the test specimen by a drive motor, a two-way lead screw and a lead screw sleeve. The push plate and the fixed block move the clamping plate relative to each other. The two sets of clamping plates ensure that the specimen is centered in both the front-back and left-right directions, thus accurately positioning the specimen and aligning the pressure center with the specimen center. This avoids the generation of eccentric forces that could cause uneven deformation and damage to the specimen under stress, thereby improving the accuracy of the test results. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of 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. Among them:

[0019] Figure 1 This is a front structural schematic diagram of a strength testing device for alkali slag cement lime soil specimens according to the present invention.

[0020] Figure 2 This is a schematic diagram of the positioning mechanism in the strength testing device for alkali slag cement lime soil specimens of this utility model.

[0021] Figure 3 This is a top view of the test platform in the strength testing device for alkali slag cement lime soil specimens of this utility model.

[0022] Figure descriptions: 100, Main unit; 101, Test platform; 102, Vertical plate; 103, Fixing plate; 104, Hydraulic telescopic rod; 105, Upper steel plate; 106, Controller; 107, Lower steel plate; 108, Support leg; 200, Positioning mechanism; 201, No. 1 straight cylinder; 202, No. 2 straight cylinder; 203, Drive motor; 204, Bidirectional lead screw; 205, Lead screw sleeve; 206, Push plate; 207, Fixing block; 208, Clamping plate. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0027] Reference Figures 1-3 As an embodiment of this utility model, a strength testing device for alkali slag cement lime-soil specimens is provided, comprising:

[0028] The main unit 100 includes a test bench 101 and a pressurization assembly. A lower steel plate 107 is fixedly installed on the upper end of the test bench 101.

[0029] The positioning mechanism 200 includes a first straight cylinder 201 and a second straight cylinder 202. The first straight cylinder 201 is fixedly connected to the lower end of the test platform 101, and the second straight cylinder 202 is fixedly connected to the lower end of the first straight cylinder 201. A drive motor 203 is fixedly connected to one end of both the first straight cylinder 201 and the second straight cylinder 202. The output end of each drive motor 203 passes through the first straight cylinder 201 and the second straight cylinder 202 respectively and is fixedly connected to a bidirectional lead screw 204. Each bidirectional lead screw 204 is provided with two opposite threads. Two lead screw sleeves 205 are engaged with each bidirectional lead screw 204. A push plate 206 is fixedly connected to the upper end of each lead screw sleeve 205. Two fixing blocks 207 are fixedly connected to the opposite side of each push plate 206. A clamping plate 208 is fixedly connected to the opposite end of each pair of fixing blocks 207.

[0030] The push plate 206 is moved relative to the drive motor 203, the bidirectional lead screw 204, and the lead screw sleeve 205. The push plate 206 and the fixing block 207 move the clamping plate 208 relative to each other. The two sets of clamping plates 208 ensure that the specimen is centered in both the front-back and left-right directions, thereby accurately positioning the specimen and aligning the pressure center with the specimen center. This avoids the generation of eccentric forces that could cause uneven deformation and damage to the specimen under stress, thus improving the accuracy of the test results.

[0031] Among them, the upper ends of the first straight cylinder 201 and the second straight cylinder 202 are symmetrically provided with two No. 1 through holes, and the test platform 101 is symmetrically provided with multiple No. 2 through holes. One end of multiple push plates 206 passes through the No. 1 through hole and the No. 2 through hole and is slidably connected in the No. 1 through hole and the No. 2 through hole. The push plate 206 and the fixing block 207 drive the clamping plate 208 to move.

[0032] The pressurizing component includes a vertical plate 102, which is fixedly connected to the upper end of the test bench 101. A fixing plate 103 is fixedly connected to one side of the test bench 101. A hydraulic telescopic rod 104 is fixedly embedded in the inner wall of the fixing plate 103. An upper steel plate 105 is fixedly connected to the telescopic end of the hydraulic telescopic rod 104. The test specimen is pressurized by the hydraulic telescopic rod 104 and the upper steel plate 105.

[0033] A pressure sensor is fixedly installed at the lower end of the upper steel plate 105, and a controller 106 is fixedly installed on the front side of the vertical plate 102. The pressure sensor and the controller 106 are connected by an electrical signal, and the pressure is detected by the pressure sensor.

[0034] Among them, the two bidirectional lead screws 204 are rotatably connected to the inner walls of the first straight cylinder 201 and the second straight cylinder 202 respectively at the ends opposite to the drive motor 203, and the lead screw sleeve 205 is moved by the bidirectional lead screws 204.

[0035] The test bench 101 has multiple support legs 108 symmetrically fixedly installed at its lower end. A reinforcing beam is fixedly connected between every two support legs 108, which supports the device.

[0036] Working principle: During testing, the alkali residue, cement, lime, and soil specimen is placed on the lower steel plate 107. First, one of the drive motors 203 is started, which drives the bidirectional lead screw 204 to rotate. The bidirectional lead screw 204 drives the lead screw sleeve 205 to move relative to the specimen. The lead screw sleeve 205 drives the push plate 206 to move relative to the specimen. The push plate 206 and the fixing block 207 drive the two clamping plates 208 to move relative to each other. The two clamping plates 208 keep the specimen centered in the left-right direction. Then, the clamping plates 208 are stopped 5cm away from the specimen to provide protection and prevent debris from flying. Then, the other drive motor is started. 203. The drive motor 203, the bidirectional lead screw 204, and the lead screw sleeve 205 drive the push plate 206 to move relative to each other. The push plate 206 and the fixing block 207 drive the clamping plate 208 to move relative to each other, so that the specimen is centered in the front-back direction, thereby accurately positioning the specimen and making the pressure center coincide with the specimen center. This avoids the generation of eccentric force, which would cause uneven deformation and damage to the specimen under stress, thus improving the accuracy of the test results. Finally, the strength of the specimen is tested by the extrusion assembly. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A strength testing device for alkali-slag cement-lime-soil specimens, characterized in that, include: The main unit (100) includes a test bench (101) and a pressurization assembly. A lower steel plate (107) is fixedly installed on the upper end of the test bench (101). A positioning mechanism (200) includes a first straight cylinder (201) and a second straight cylinder (202). The first straight cylinder (201) is fixedly connected to the lower end of the test platform (101), and the second straight cylinder (202) is fixedly connected to the lower end of the first straight cylinder (201). A drive motor (203) is fixedly connected to one end of both the first straight cylinder (201) and the second straight cylinder (202). The output end of each drive motor (203) passes through the first straight cylinder (201) and the second straight cylinder (202), respectively. The cylinder (202) is fixedly connected to a bidirectional lead screw (204). Each bidirectional lead screw (204) is provided with two opposite threads. Each bidirectional lead screw (204) is engaged with two lead screw sleeves (205). Each lead screw sleeve (205) is fixedly connected to a push plate (206) at its upper end. Each push plate (206) is fixedly connected to two fixing blocks (207) on its opposite side. Each pair of fixing blocks (207) is fixedly connected to a clamping plate (208) at their opposite ends.

2. The strength testing device for alkali slag cement lime-soil specimens according to claim 1, characterized in that: The upper ends of the first straight cylinder (201) and the second straight cylinder (202) are symmetrically provided with two first through holes. The test platform (101) is symmetrically provided with multiple second through holes. One end of each of the multiple push plates (206) passes through the first through hole and the second through hole and is slidably connected in the first through hole and the second through hole.

3. The strength testing device for alkali slag cement lime-soil specimens according to claim 1, characterized in that: The pressurization assembly includes a vertical plate (102), which is fixedly connected to the upper end of the test bench (101). A fixing plate (103) is fixedly connected to one side of the test bench (101). A hydraulic telescopic rod (104) is fixedly embedded in the inner wall of the fixing plate (103). An upper steel plate (105) is fixedly connected to the telescopic end of the hydraulic telescopic rod (104).

4. The strength testing device for alkali slag cement lime-soil specimens according to claim 3, characterized in that: A pressure sensor is fixedly installed at the lower end of the upper steel plate (105), and a controller (106) is fixedly installed on the front side of the vertical plate (102). The pressure sensor and the controller (106) are connected by an electrical signal.

5. The strength testing device for alkali slag cement lime-soil specimens according to claim 1, characterized in that: The two bidirectional lead screws (204) are rotatably connected to the inner walls of the first straight cylinder (201) and the second straight cylinder (202) respectively, at the ends opposite to the drive motor (203).

6. The strength testing device for alkali slag cement lime-soil specimens according to claim 1, characterized in that: The lower end of the test bench (101) is symmetrically fixedly equipped with multiple support legs (108), and a reinforcing beam is fixedly connected between every two support legs (108).

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