Cement strength breaking testing machine

Abstract

The utility model discloses a cement strength anti -break testing machine relates to cement performance test field, including equipment main part, equipment main part top one side is provided with the pressure -bending detection mechanism, is provided with the pressurizing mechanism in equipment main part, and the pressurizing mechanism includes elevating support, and the elevating support is rotationally connected with worm wheel, and the elevating support front side is fixed with second motor, and second motor output is fixed with worm, and worm is engaged with worm wheel, and the middle screw thread of worm wheel is connected with elevating stud, and the bottom hinged of equipment main part has pressurizing lever, and two connecting sliding blocks are slidably connected on pressurizing lever, and connecting sliding block is hinged with elevating stud, and another connecting sliding block is connected with pressure -bending detection mechanism. Advantageous effects lie in: second motor drives elevating stud to go up and down through worm and worm wheel, and elevating stud drives force transmission vertical pole to go up through pressurizing lever, and can pressurize cement test block like this, utilizes the big transmission ratio and self -locking characteristic of worm and worm wheel, can fine control pressure and the stability of pressure.

Description

Technical Field

[0001] This utility model relates to the field of cement performance testing, and in particular to a cement strength flexural strength testing machine. Background Technology

[0002] Cement is a widely used primary material in infrastructure construction projects, and its quality directly affects the quality of the construction project. Through scientific and comprehensive testing methods, the quality of cement testing can be effectively improved, ensuring that cement performance indicators meet construction design specifications and achieve the intended application effects. Therefore, cement quality testing is of paramount importance.

[0003] For example, patent document CN218782136U discloses an electronic cement strength flexural strength testing machine, which includes a rotary drive device, a motion conversion device, and a working device fixed on a frame. The rotary drive device provides power, and the motion conversion device is connected to the output end of the rotary drive device. The motion conversion device drives the working device to reciprocate, thereby realizing the flexural tensile test of the standard cement sample being tested. The working device includes a flexural pressure roller device and a flexural support roller device. The flexural pressure roller device is fixed on the top of the frame, and the flexural support roller device is located below the flexural pressure roller device. The flexural pressure roller device includes a pressure roller body, and the flexural support roller device includes two or more support roller bodies. The pressure roller body and the support roller bodies are arranged facing each other, and the gap between the pressure roller bodies corresponds to the gap between two adjacent support roller bodies. In existing technologies, cement flexural strength tests are mostly conducted by using a hydraulic system to continuously pressurize the cement specimen until it collapses. During the pressurization process, a force sensor collects data to obtain the flexural strength of the cement. However, the hydraulic system pressurization method is costly, troublesome to maintain, and has poor accuracy and stability. Utility Model Content

[0004] The purpose of this invention is to provide a cement strength flexural strength testing machine to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A cement strength flexural strength testing machine includes a main body with a compression-flexural testing mechanism on one side of the top. The main body includes a worktable, which is a box-shaped structure with legs. A pressure mechanism is installed inside the worktable, including a sliding guide rail bracket fixedly connected to the worktable. A lifting bracket is slidably connected to the sliding guide rail bracket. A transverse drive component for driving the lifting bracket is installed on the sliding guide rail bracket. A worm gear is rotatably connected to the lifting bracket. A second motor is fixedly connected to the front of the lifting bracket. A worm is fixedly connected to the output end of the second motor. The worm is rotatably connected to the lifting bracket and meshes with the worm gear. A lifting stud is threadedly connected to the middle of the worm gear and is slidably connected to the lifting bracket. A pressure lever is hinged to the bottom of the worktable. Two connecting sliders are slidably connected to the pressure lever. The connecting sliders are hinged to the lifting studs, and the other connecting slider is connected to the compression-flexural testing mechanism.

[0007] Preferably, the lateral drive assembly includes a first motor fixedly connected to the sliding guide rail bracket, a translation screw fixedly connected to the output end of the first motor, the translation screw being rotatably connected to the sliding guide rail bracket, and the translation screw being threadedly connected to the lifting bracket.

[0008] Preferably, the front end of the workbench has two symmetrically arranged inspection doors that are rotatably connected, the top of the workbench is fixedly connected to a protective box, the front end of the protective box is rotatably connected to a protective door, the protective door has an observation window covered with transparent material, and the pressure and folding detection mechanism is set inside the protective box.

[0009] Preferably, the flexural testing mechanism includes a testing bracket fixedly connected to the top of the workbench, the testing bracket being fixedly connected to the protective box, a force sensor fixedly connected to the upper end of the testing bracket, an anti-flexural pressure roller fixedly connected to the bottom of the force sensor, a force transmission vertical rod slidably connected to the lower end of the testing bracket, a test block base fixedly connected to the top of the force transmission vertical rod, a cement test block placed on the test block base, and a connecting slider rotatably connected to the bottom of the force transmission vertical rod.

[0010] Preferably, a dust collection box is fixedly connected to one side of the workbench, and two symmetrically arranged collection hoppers are provided on the front and rear sides of the detection bracket. Both collection hoppers are fixedly connected to the dust collection box and their internal spaces are connected. An opening is provided at a corresponding position on one side of the workbench, and a dust collection drawer is slidably connected in the opening between the dust collection box and the workbench.

[0011] Preferably, a horizontal plate is fixedly connected to the force transmission vertical rod, and two symmetrically arranged hydraulic damping rods are fixedly connected to the horizontal plate of the force transmission vertical rod, with the top of the hydraulic damping rods contacting the worktable.

[0012] The beneficial effects are as follows: To solve the problems of low pressurization accuracy and high control difficulty, this pressurization mechanism is designed using the lever principle. The second motor drives the lifting stud to rise and fall through the worm and worm wheel. The lifting stud presses against the pressurization lever, and the other end of the pressurization lever rises, driving the force transmission vertical rod to rise, thus realizing the pressurization of the cement test block. Utilizing the large transmission ratio and self-locking characteristics of the worm and worm wheel, precise pressure control and stability of the pressurization process can be achieved. The lever torque can be changed by the lateral drive component, thereby changing the pressurization range and the pressure increase rate, thus obtaining more precise data. This pressurization mechanism has a simple structure, is easy to manufacture and maintain, and has the advantages of easy control and adjustment, precise pressurization, and stable pressurization process.

[0013] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a perspective view of a cement strength flexural strength testing machine according to the present invention;

[0016] Figure 2 This is a front sectional view of a cement strength flexural strength testing machine according to the present invention;

[0017] Figure 3 This is a front view of the internal structure of a cement strength flexural strength testing machine according to the present invention;

[0018] Figure 4 This is a front view of the compression and bending testing mechanism of a cement strength flexural strength testing machine according to this utility model;

[0019] Figure 5 This is a perspective view of the relative positions of the testing bracket and the dust collection box of the cement strength flexural strength testing machine described in this utility model;

[0020] Figure 6 This is a perspective view of the relative positions of the compression and bending testing mechanism and the pressure application mechanism of the cement strength flexural strength testing machine described in this utility model;

[0021] Figure 7 This is a top view of the sliding guide rail bracket of the cement strength flexural strength testing machine described in this utility model;

[0022] Figure 8 This is a perspective view of the relative positions of the worm gear and the lifting stud of the cement strength flexural strength testing machine described in this utility model.

[0023] The annotations in the attached figures are explained as follows:

[0024] 101. Workbench; 102. Inspection door; 103. Protective box; 104. Protective door; 105. Dust collection drawer; 106. Dust collection box; 107. Collection hopper; 201. Testing bracket; 202. Force sensor; 203. Bending resistance roller; 204. Test block base; 205. Force transmission vertical rod; 206. Hydraulic damping rod; 207. Cement test block; 301. Sliding guide rail bracket; 302. Lifting bracket; 303. First motor; 304. Translation screw; 305. Second motor; 306. Worm gear; 307. Worm wheel; 308. Lifting stud; 309. Pressure lever; 310. Connecting slider. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] like Figures 1-8As shown, a cement strength flexural strength testing machine includes a main body with a compression-flexural testing mechanism on one side of the top. The main body includes a workbench 101, which is a box-shaped structure with legs. A pressurizing mechanism is installed inside the workbench 101. The pressurizing mechanism includes a sliding guide rail bracket 301 fixedly connected to the workbench 101. The sliding guide rail bracket 301 consists of two parallel guide rails with vertical plates fixed to both ends. The vertical plates are fixedly connected to the workbench 101. A lifting bracket 302 is slidably connected to the sliding guide rail bracket 301, positioned between the two parallel guide rails. The sliding guide rail bracket 301 is equipped with a mechanism for driving the lifting mechanism. The lateral drive assembly for moving the lowering bracket 302 includes a first motor 303 bolted to the sliding guide rail bracket 301. A translation screw 304 is fixedly connected to the output end of the first motor 303, rotatably connected to a bearing in the sliding guide rail bracket 301, and threadedly connected to the lifting bracket 302. A worm gear 307 is rotatably connected to the lifting bracket 302. A second motor 305 is fixedly connected to the front side of the lifting bracket 302, and a worm 306 is fixedly connected to the output end of the second motor 305. The worm 306 is rotatably connected to the lifting bracket 302, and meshes with the worm gear 307. The worm gear 307 has a central screw thread. A lifting stud 308 is connected to the workbench 101, and the lifting stud 308 is slidably connected to the lifting bracket 302. A pressure lever 309 is hinged to the bottom of the workbench 101. The position of the pressure lever 309 and the rotational connection of the workbench 101 is close to the force transmission vertical rod 205. Two connecting sliders 310 are slidably connected to the pressure lever 309. The connecting sliders 310 are hinged to the lifting stud 308, and the other connecting slider 310 is connected to the pressure detection mechanism. To solve the problems of low pressure accuracy and high control difficulty, this pressure mechanism is designed using the lever principle. The second motor 305 drives the worm gear 306 to rotate, the worm gear 306 drives the worm wheel 307 to rotate, and the worm wheel 307 drives the lifting bracket 302 to rotate. The lowering stud 308 is raised and lowered, pressing down on the pressure lever 309. The other end of the pressure lever 309 rises, driving the force transmission vertical rod 205 to rise, thus pressurizing the cement test block 207. Utilizing the large transmission ratio and self-locking characteristics of the worm gear 306 and worm wheel 307, precise control of the pressure intensity and stability during the pressurization process can be achieved. The pressurization range and pressure increase rate can be changed by altering the distance from the lifting bracket 302 to the force transmission vertical rod 205, thus obtaining more precise data. This pressurization mechanism has a simple structure, is easy to manufacture and maintain, and has the advantages of easy control and adjustment, precise pressurization, and stable pressurization process.

[0029] Two symmetrically arranged maintenance doors 102 are rotatably connected to the front end of the workbench 101, facilitating maintenance of the pressurizing mechanism inside the workbench 101 by the operator. A protective box 103 is fixedly connected to the top of the workbench 101, and a protective door 104 is rotatably connected to the front end of the protective box 103. An observation window covered with transparent material is opened on the protective door 104. The arrangement of the protective box 103 and the protective door 104 prevents injury to the operator from debris generated by the breakage of the cement test block 207 during the test. Furthermore, the observation window on the protective door 104 allows the operator to easily observe the test results. The pressure and bending testing mechanism is located inside the protective box 103. A dust collection box 106 is fixedly connected to one side of the workbench 101. Two symmetrically arranged collection hoppers 107 are provided on the front and rear sides of the testing bracket 201. Both collection hoppers 107 are fixedly connected to the dust collection box 106 and their internal spaces are connected. The dust collection box 106 has an opening at a position corresponding to one side of the workbench 101. A dust collection drawer 105 is slidably connected in the opening between the dust collection box 106 and the workbench 101. During the test, the cement test block 207 produces debris that can enter the dust collection box 106 through the collection hopper 107 and finally fall into the dust collection drawer 105. The staff can pull out the dust collection drawer 105 to collect and clean the debris inside.

[0030] The bending test mechanism includes a test bracket 201 fixedly connected to the top of the workbench 101. The test bracket 201 is fixedly connected to the protective box 103. A force sensor 202 (existing technology) is fixedly connected to the upper end of the test bracket 201. A bending resistance roller 203 is fixedly connected to the bottom of the force sensor 202. A force transmission vertical rod 205 is slidably connected to the lower end of the test bracket 201. A test block base 204 is fixedly connected to the top of the force transmission vertical rod 205. A cement test block 207 is placed on the test block base 204. The bottom of the force transmission vertical rod 205 is rotatably connected to the connecting slider 310. A horizontal plate is fixedly connected to the force transmission vertical rod 205. Two symmetrically arranged hydraulic damping rods 206 are fixedly connected to the horizontal plate of the force transmission vertical rod 205. The top of the hydraulic damping rods 206 contacts the workbench 101. The characteristic of this device is that it can move slowly without obstruction, but it produces greater obstruction when moving quickly. The hydraulic damping rod 206 is existing technology. After the worker places the cement block 207 on the block base 204, the pressurizing mechanism starts and drives the force transmission rod 205 to rise. The force transmission rod 205 drives the cement block 207 to rise and contact the anti-bending pressure roller 203. Then the pressurizing mechanism continues to work to apply pressure to the cement block 207. The anti-bending pressure roller 203 is subjected to the same force. The force is transmitted to the force sensor 202, which receives and records the force. When the pressure reaches the limit, the cement block 207 breaks open. The sudden loss of force on the block base 204 may cause the force transmission rod 205 to move upward. At this time, the hydraulic damping rod 206 can buffer the upward movement of the force transmission rod 205, thereby avoiding damage to the equipment.

[0031] Working Principle: During the experiment, the operator opens the protective door 104 and places the cement test block 207 on the test block base 204. Then, the protective door 104 is closed, and the pressurizing mechanism is activated. The second motor 305 drives the worm gear 306 to rotate, which in turn drives the worm wheel 307. The worm wheel 307 drives the lifting stud 308 to rise and fall. The lowering stud 308 presses down on the pressure lever 309, causing the other end of the pressure lever 309 to rise, thus increasing the pressure on the cement test block 207. Utilizing the large transmission ratio and self-locking characteristics of the worm gear 306 and worm wheel 307, precise control of the pressure intensity and stability during the pressurization process can be achieved. The pressurization range and pressure increase rate can be changed by altering the distance from the lifting bracket 302 to the force transmission stud 205, thus obtaining more precise data. This pressurizing mechanism has a simple structure, is easy to manufacture and maintain, and has the advantages of easy control and adjustment, precise pressurization, and stable pressurization process. Subsequently, the pressurizing mechanism continues to work to apply pressure to the cement test block 207. The bending roller 203 is subjected to the same force, which is transmitted to the force sensor 202. The force sensor 202 receives and records the force. When the pressure reaches the limit, the cement test block 207 breaks open. The sudden loss of force on the test block base 204 may cause the force transmission rod 205 to move upward. At this time, the hydraulic damping rod 206 can buffer the upward movement of the force transmission rod 205, thereby avoiding equipment damage. The debris generated by the cement test block 207 during the test can enter the dust collection box 106 through the collection hopper 107 and finally fall into the dust collection drawer 105. The staff can pull out the dust collection drawer 105 to collect and clean the debris inside.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cement strength flexural strength testing machine, comprising a main body of equipment, wherein a compression-flexural testing mechanism is provided on one side of the top of the main body of equipment, characterized in that: The main body of the equipment includes a workbench (101), which is a box-shaped structure with legs. A pressurizing mechanism is installed inside the workbench (101). The pressurizing mechanism includes a sliding guide rail bracket (301) fixedly connected to the workbench (101). A lifting bracket (302) is slidably connected to the sliding guide rail bracket (301). A transverse drive assembly for driving the lifting bracket (302) is installed on the sliding guide rail bracket (301). A worm gear (307) is rotatably connected to the lifting bracket (302). A second motor (305) is fixedly connected to the front side of the lifting bracket (302). 5) A worm gear (306) is fixedly connected to the output end. The worm gear (306) is rotatably connected to the lifting bracket (302). The worm gear (306) meshes with the worm wheel (307). A lifting stud (308) is threadedly connected to the middle of the worm wheel (307). The lifting stud (308) is slidably connected to the lifting bracket (302). A pressure lever (309) is hinged to the bottom of the workbench (101). Two connecting sliders (310) are slidably connected to the pressure lever (309). The connecting sliders (310) are hinged to the lifting stud (308). The connecting sliders (310) on the other side are connected to the pressure and bending detection mechanism.

2. The cement strength flexural strength testing machine according to claim 1, characterized in that: The lateral drive assembly includes a first motor (303) fixedly connected to the sliding guide rail bracket (301), and a translation screw (304) fixedly connected to the output end of the first motor (303). The translation screw (304) is rotatably connected to the sliding guide rail bracket (301), and the translation screw (304) is threadedly connected to the lifting bracket (302).

3. A cement strength flexural strength testing machine according to claim 1, characterized in that: The front end of the workbench (101) is rotatably connected to two symmetrically arranged inspection doors (102). A protective box (103) is fixedly connected to the top of the workbench (101). A protective door (104) is rotatably connected to the front end of the protective box (103). An observation window covered with transparent material is opened on the protective door (104). The pressure and folding detection mechanism is set inside the protective box (103).

4. A cement strength flexural strength testing machine according to claim 3, characterized in that: The pressure and flexure testing mechanism includes a testing bracket (201) fixedly connected to the top of the workbench (101). The testing bracket (201) is fixedly connected to the protective box (103). A force sensor (202) is fixedly connected to the upper end of the testing bracket (201). An anti-flexure roller (203) is fixedly connected to the bottom of the force sensor (202). A force transmission vertical rod (205) is slidably connected to the lower end of the testing bracket (201). A test block base (204) is fixedly connected to the top of the force transmission vertical rod (205). A cement test block (207) is placed on the test block base (204). The bottom of the force transmission vertical rod (205) is rotatably connected to the connecting slider (310).

5. A cement strength flexural strength testing machine according to claim 4, characterized in that: A dust collection box (106) is fixedly connected to one side of the workbench (101). Two symmetrically arranged collection hoppers (107) are provided on the front and rear sides of the detection bracket (201). Both collection hoppers (107) are fixedly connected to the dust collection box (106) and their internal spaces are connected. An opening is provided on one side of the dust collection box (106) corresponding to one side of the workbench (101). A dust collection drawer (105) is slidably connected to the opening of the dust collection box (106) and the workbench (101).

6. A cement strength flexural strength testing machine according to claim 4, characterized in that: A horizontal plate is fixedly connected to the force transmission vertical rod (205), and two symmetrically arranged hydraulic damping rods (206) are fixedly connected to the horizontal plate of the force transmission vertical rod (205). The top of the hydraulic damping rods (206) is in contact with the worktable (101).

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