Cement mortar fracture resistance testing machine

Abstract

The utility model belongs to the technical field of cement mortar tests, and particularly relates to a cement mortar anti-bending testing machine which comprises a base, a stand column installed in the middle of the base and a lever rotationally connected to the upper end of the stand column, a balance weight is arranged at the left end of the lever, and an anti-bending clamp is installed at the bottom end of the lever through a transmission connecting rod. An adjusting rotating disc is arranged at the bottom end of the anti-bending clamp, a graduated scale is installed at the right end of the lever, a moving weight is arranged outside the graduated scale, and a servo motor is installed at the lower end of the balance weight. The two trays capable of transversely moving are installed at the left end of the base, sliding bases in the two sliding rails can drive the two trays to rapidly move to the lower end of the anti-bending clamp, detachable inner frames are installed in the two trays, and the two inner frames can collect cement mortar in the anti-bending clamp during an experiment; the cement mortar is effectively prevented from falling onto the base, and the integrity of the cement mortar is ensured, so that the fracture of the cement mortar is conveniently observed.

Description

Technical Field

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

[0002] Cement mortar is made by mixing cement, standard sand, and water in a specific ratio. Its mechanical properties directly reflect the quality of cement and are crucial to the safety and durability of the entire engineering project. Among the many mechanical properties, flexural strength is extremely critical. Therefore, flexural strength tests are needed to determine the flexural strength of cement mortar. Existing cement mortar flexural testing machines can basically meet daily usage needs, but there are still some shortcomings that need improvement.

[0003] The widely used cement mortar flexural strength testing machine requires placing the cement mortar in a flexural fixture during use. By continuously applying stress to the cement mortar, it will fracture within the fixture, thus measuring its flexural strength. However, in actual use, after the cement mortar fractures in the fixture, it easily slips out and falls onto the equipment base, causing damage. This not only destroys the integrity of the cement mortar but also makes subsequent observation of the cross-section inconvenient. Therefore, we propose a cement mortar flexural strength testing machine to solve the above problems. Utility Model Content

[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.

[0005] Specifically, the technical problem to be solved by this utility model is to provide a cement mortar flexural strength testing machine to solve the technical problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A cement mortar flexural strength testing machine includes a base, a column installed in the middle of the base, and a lever rotatably connected to the upper end of the column. A counterweight is provided at the left end of the lever, and a flexural strength clamp is installed at the bottom end of the lever via a transmission connecting rod. An adjusting turntable is provided at the bottom end of the flexural strength clamp. A scale is installed at the right end of the lever, and a movable weight is provided outside the scale. A servo motor is installed at the lower end of the counterweight, and a lead screw is connected to the output end of the servo motor. The lead screw and the scale are threaded together. Slide rails are installed on both sides of the front end of the left end of the base. Slide seats are slidably connected in both sets of slide rails. Sleeves are fixed at the top of both sets of slide seats. Two sets of connecting rods are provided in both sets of sleeves. A tray is installed at the opposite end of the connecting rods on both sets of sleeves. An inner frame is placed inside both sets of trays. A pull rod is installed at the opposite end of the connecting rods on both sets of sleeves.

[0008] As an improved technical solution, two sets of sliding grooves are provided in both sets of sleeves, and two sets of connecting rods on the sleeves pass through the two sets of sliding grooves. Sliding sleeves are fixed to the outside of the two sets of connecting rods, and a return spring is provided inside the sliding groove.

[0009] As an improved technical solution, both sets of trays have grooves at the center of opposite ends that correspond to the center of the adjustment turntable, and the two sets of inner frames also have corresponding grooves.

[0010] As an improved technical solution, a linear driver is installed between the two sets of slide rails, and the output end of the linear driver is fixed to the outer wall of the sleeve inside the two sets of slide rails through a connecting bracket.

[0011] As an improved technical solution, both sets of pull rods have a rotating groove in the middle, and a rotating shaft is rotatably connected in the rotating groove. A retaining plate is fixed outside the rotating shaft. Both sets of sleeves have a retaining groove at opposite ends, and the retaining plate can rotate into the retaining groove on the sleeve.

[0012] As an improved technical solution, the return springs in the slide groove are all wound around the outside of the connecting rod, and the two ends of the return springs are respectively connected to the outer wall of the slide sleeve and the inner wall of the slide groove. The slide sleeve is elastically connected to the inner wall of the slide groove through the return springs.

[0013] As an improved technical solution, a control box is provided at the right end of the base, and the output end of the linear driver is electrically connected to the control box through a wire.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are:

[0015] I. This utility model has two sets of pallets that can move laterally installed on the left end of the base. The slides in the two sets of slide rails can drive the two sets of pallets to move quickly to the lower end of the bending clamp. The two sets of pallets are equipped with detachable inner frames, which can collect the cement mortar inside the bending clamp during the experiment. This effectively prevents the cement mortar from falling onto the base, ensuring the integrity of the cement mortar and facilitating the observation of the fracture surface of the cement mortar.

[0016] II. This utility model, by installing sliding sleeves and return springs on the outside of the two sets of connecting rods, allows the two sets of connecting rods to push the trays toward the anti-bending clamp under the elastic force of the return springs, and allows the two sets of trays to move rapidly toward each other under the elastic force of the return springs, so that the two sets of trays are stably located under the anti-bending clamps, ensuring the stability of the two sets of trays and the inner frame during use. Attached Figure Description

[0017] 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:

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of a partial active state structure of the present invention;

[0020] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0021] Figure 4 For the present utility model Figure 2 A magnified structural diagram at point A;

[0022] Figure 5 For the present utility model Figure 3 A magnified structural diagram at point B.

[0023] In the diagram: 1. Base; 2. Column; 3. Lever; 4. Balance weight; 5. Transmission link; 6. Anti-bending clamp; 7. Adjustment turntable; 8. Scale; 9. Swimming weight; 10. Servo motor; 11. Lead screw; 12. Slide rail; 13. Sleeve; 14. Connecting rod; 15. Tray; 16. Inner frame; 17. Linear actuator; 18. Pull rod; 19. Slide groove; 20. Slide sleeve; 21. Return spring; 22. Rotary groove; 23. Rotating shaft; 24. Clamping plate; 25. Clamping slot; 26. Control box; 27. Slide seat; 28. Connecting bracket. Detailed Implementation

[0024] 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.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0027] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] Figures 1 to 5 As shown, this embodiment provides a cement mortar flexural strength testing machine, including a base 1, a column 2 installed in the middle of the base 1, and a lever 3 rotatably connected to the upper end of the column 2. A counterweight 4 is provided at the left end of the lever 3, and a flexural clamp 6 is installed at the bottom end of the lever 3 via a transmission connecting rod 5. An adjusting turntable 7 is provided at the bottom end of the flexural clamp 6. A scale 8 is installed at the right end of the lever 3, and a movable weight 9 is provided outside the scale 8. A servo motor 10 is installed at the lower end of the counterweight 4, and the output end of the servo motor 10 is connected to a wire. Rod 11, lead screw 11 and scale 8 are threaded together. Slide rails 12 are installed on both sides of the left front end of base 1. Slide seats 27 are slidably connected in both slide rails 12. Sleeves 13 are fixed at the top of both slide seats 27. Two sets of connecting rods 14 are provided in both sleeves 13. A tray 15 is installed at the opposite end of the connecting rods 14 on both sleeves 13. An inner frame 16 is placed inside both trays 15. Pull rods 18 are installed at the opposite ends of the connecting rods 14 on both sleeves 13.

[0029] By installing two sets of pallets 15 that can move laterally at the left end of the base 1, the slide blocks 27 in the two sets of slide rails 12 can drive the two sets of pallets 15 to move quickly to the lower end of the bending clamp 6. A detachable inner frame 16 is installed in the two sets of pallets 15, so that the two sets of inner frames 16 can collect the cement mortar inside the bending clamp 6 during the experiment, effectively preventing the cement mortar from falling onto the base 1, ensuring the integrity of the cement mortar, and thus facilitating the observation of the cement mortar fracture.

[0030] In other embodiments, two sets of sliding grooves 19 are provided in both sets of sleeves 13, and two sets of connecting rods 14 on the sleeves 13 pass through the two sets of sliding grooves 19. Sliding sleeves 20 are fixed to the outside of both sets of connecting rods 14, and a return spring 21 is provided inside the sliding grooves 19.

[0031] By installing a sliding sleeve 20 and a return spring 21 on the outside of the two sets of connecting rods 14, the two sets of connecting rods 14 can push the tray 15 toward the anti-bending clamp 6 under the elastic force of the return spring 21, and the two sets of trays 15 can move quickly toward each other under the elastic force of the return spring 21, so that the two sets of trays 15 are stably located below the anti-bending clamp 6, ensuring the stability of the two sets of trays 15 and the inner frame 16 during use.

[0032] like Figure 2 As shown, both sets of trays 15 have grooves at the middle of opposite ends that correspond to the middle of the adjusting turntable 7, and both sets of inner frames 16 also have corresponding grooves.

[0033] This design allows the two sets of trays 15 to fit together, reducing the gap between them and ensuring that the inner frames 16 on the two sets of trays 15 can fully receive the falling cement mortar.

[0034] like Figure 1 and 2 As shown, a linear actuator 17 is installed between the two sets of slide rails 12, and the output end of the linear actuator 17 is fixed to the outer wall of the sleeve 13 inside the two sets of slide rails 12 through the connecting bracket 28.

[0035] This design enables the linear actuator 17 to drive the slide blocks 27 within the two sets of slide rails 12 to move laterally, thereby ensuring the stability of the two sets of slide blocks 27 during movement.

[0036] like Figure 4 As shown, both sets of pull rods 18 have a rotating groove 22 in the middle, and a rotating shaft 23 is rotatably connected in the rotating groove 22. A retaining plate 24 is fixed to the outside of the rotating shaft 23. Both sets of sleeves 13 have a retaining groove 25 at opposite ends, and the retaining plate 24 can rotate into the retaining groove 25 on the sleeve 13.

[0037] By installing a rotatable locking plate 24 on the pull rod 18, when the pull rod 18 is pulled to move the tray 15 away from the lower end of the anti-bending clamp 6, the locking plate 24 can be moved to rotate along the rotating shaft 23 in the rotating groove 22 on the pull rod 18, so that the locking plate 24 rotates into the locking groove 25, forming a lateral limit on the pull rod 18 toward the sleeve 13, so that the two sets of sleeves 13 do not need to continuously pull the pull rod 18 during the movement, which improves the convenience of the device during use.

[0038] In other embodiments, the return springs 21 in the slide groove 19 are all wound around the outside of the connecting rod 14. The two ends of the return springs 21 are respectively connected to the outer wall of the slide sleeve 20 and the inner wall of the slide groove 19. The slide sleeve 20 forms an elastic connection with the inner wall of the slide groove 19 through the return springs 21.

[0039] Through this design,

[0040] In other embodiments, a control box 26 is provided at the right end of the base 1, and the output end of the linear driver 17 is electrically connected to the control box 26 through a wire;

[0041] This design enables the control box 26 to control the start and stop of the linear drive 17 in real time, ensuring that the linear drive 17 can be used normally.

[0042] This utility model provides a cement mortar flexural strength testing machine, the specific working principle of which is as follows:

[0043] When using this equipment, cement mortar can be placed inside the bending clamp 6 first, and then the cement mortar inside the bending clamp 6 can be fixed by rotating the adjusting turntable 7. Then, the linear drive 17 can be started, so that the linear drive 17 drives the slide blocks 27 in the two sets of slide rails 12 to move towards the adjusting turntable 7, so that the two sets of adjusting turntables 7 can drive the trays 15 on the sleeve 13 and the linear drive 17 to the bottom of the bending clamp 6. Then, the locking plate 24 on the rotating shaft 23 is moved, so that the locking plate 24 rotates away from the slot 25, so that the return spring 21 outside the connecting rod 14 releases its elasticity, so that the trays 15 on the two sets of sleeves 13 move towards each other, so that the two sets of trays 15 drive the two sets of inner frames 16 to move towards each other to the front and rear ends of the bending clamp 6. Then, the servo motor 10 can be started, so that the lead screw 11 rotates, so that the floating weight 9 moves to the right side of the scale 8 to gradually increase the load and apply a test force to the cement mortar inside the bending clamp 6. As the test force increases, The bending stress on the cement mortar inside the flexural clamp 6 gradually increases. When it reaches the flexural strength of the cement mortar, it fractures. After the cement mortar fractures, the two sets of inner frames 16 at the bottom of the flexural clamp 6 can completely collect the broken cement mortar and debris. Then, the pull rods 18 on the two sets of sleeves 13 can be pulled outwards, causing the pull rods 18 to move the two sets of connecting rods 14 and trays 15 away from the flexural clamp 6, and causing the sliding sleeves 20 outside the connecting rods 14 to counteract the fracture. The spring 21 is compressed, and then the card plate 24 is moved to rotate into the slot 25, fixing the position of the pull rod 18. Then the linear actuator 17 is activated, pushing the two sets of slide blocks 27 to move laterally along the slide rail 12, so that the two sets of trays 15 move the inner frame 16 away from the anti-bending clamp 6. Then the inner frame 16 in the tray 15 can be taken out, and the cement mortar in the inner frame 16 can be collected and weighed. The operation is then completed.

[0044] 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 cement mortar flexural strength testing machine, comprising a base (1), a column (2) installed in the middle of the base (1), and a lever (3) rotatably connected to the upper end of the column (2), wherein a balance weight (4) is provided at the left end of the lever (3), and a flexural strength clamp (6) is installed at the bottom end of the lever (3) via a transmission connecting rod (5), wherein an adjusting turntable (7) is provided at the bottom end of the flexural strength clamp (6), characterized in that: A scale (8) is installed on the right end of the lever (3). A movable weight (9) is provided on the outside of the scale (8). A servo motor (10) is installed at the lower end of the balance weight (4). A lead screw (11) is connected to the output end of the servo motor (10). The lead screw (11) and the scale (8) are connected by a thread. Slide rails (12) are installed on both sides of the front end of the left end of the base (1). Both sets of slide rails (12) are slidably connected to each other. Slide (27), each of the two sets of slides (27) has a sleeve (13) fixed at its top, each of the two sets of sleeves (13) has two sets of connecting rods (14), each of the two sets of sleeves (13) has a tray (15) installed at the opposite end of the connecting rods (14) on the two sets of sleeves (13), each of the two sets of trays (15) has an inner frame (16) placed inside, and each of the two sets of sleeves (13) has a pull rod (18) installed at the opposite end of the connecting rods (14) on the two sets of sleeves (13).

2. The cement mortar flexural strength testing machine according to claim 1, characterized in that: Two sets of sliding grooves (19) are provided in both sets of sleeves (13). Two sets of connecting rods (14) on the sleeves (13) pass through the two sets of sliding grooves (19). Sliding sleeves (20) are fixed to the outside of the two sets of connecting rods (14). A return spring (21) is provided inside the sliding grooves (19).

3. The cement mortar flexural strength testing machine according to claim 1, characterized in that: Both sets of trays (15) have a groove at the middle of one end that corresponds to the middle of the adjusting turntable (7), and both sets of inner frames (16) also have a corresponding groove.

4. The cement mortar flexural strength testing machine according to claim 1, characterized in that: A linear actuator (17) is installed between the two sets of slide rails (12), and the output end of the linear actuator (17) is fixed to the outer wall of the sleeve (13) inside the two sets of slide rails (12) by a connecting bracket (28).

5. A cement mortar flexural strength testing machine according to claim 1, characterized in that: Both sets of pull rods (18) have a rotating groove (22) in the middle, and a rotating shaft (23) is rotatably connected in the rotating groove (22). A retaining plate (24) is fixed on the outside of the rotating shaft (23). Both sets of sleeves (13) have a retaining groove (25) at opposite ends, and the retaining plate (24) can rotate into the retaining groove (25) on the sleeve (13).

6. A cement mortar flexural strength testing machine according to claim 2, characterized in that: The return springs (21) inside the slide groove (19) are all wrapped around the outside of the connecting rod (14). The two ends of the return springs (21) are respectively connected to the outer wall of the slide sleeve (20) and the inner wall of the slide groove (19). The slide sleeve (20) is elastically connected to the inner wall of the slide groove (19) through the return springs (21).

7. A cement mortar flexural strength testing machine according to claim 4, characterized in that: A control box (26) is provided on the right end of the base (1), and the output end of the linear driver (17) is electrically connected to the control box (26) through a wire.

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