Concrete compression resistance detection equipment

Abstract

The utility model discloses concrete compression resistance detection equipment, and belongs to the technical field of concrete compression resistance detection. Comprising a pedestal, a press assembly, a pressure-bearing platform, a core fixing unit and a protective sleeve, and the press assembly comprises stand columns fixed to the two sides of the top face of the pedestal; a span beam is fixed to the tops of the stand columns. A press machine is fixed on the span beam; the pressure bearing platform is fixed to the top face of the pedestal and arranged under the press machine. The core fixing unit comprises supporting tables fixed to the two sides of the pressure bearing platform, and manual screw rod and screw rod sliding tables are fixed to the tops of the supporting tables. An overturning limiting seat is fixed at the sliding end of the manual screw rod and screw rod sliding table; a fixed core swing arm is rotationally mounted on the turnover limiting seat through a pin shaft; the fixed core swing arm is attached to the top face of the pressure bearing platform. According to the concrete compression resistance detection equipment disclosed by the utility model, automatic centering and detection protection can be carried out on a concrete test piece, and compression resistance detection can be carried out.

Description

Technical Field

[0001] The utility model specifically relates to concrete compression resistance testing equipment and belongs to the technical field of concrete compression resistance testing. Background Art

[0002] As one of the most common testing items in engineering projects, concrete compressive strength testing has a great demand in actual testing. At present, most domestic concrete compressive strength tests are performed by placing a group of concrete specimens directly on the pressure platform of a pressure testing machine for pressure testing; compression testing equipment such as China Patent Authorization Announcement No.: CN220084596U discloses a concrete compression testing equipment, including a cleaning mechanism and a testing mechanism. When the pallet moves to the bottom, the larger stones and residues on the pallet are pushed to one side of the pallet through the movement of the scraper, and then fall into the inside of the storage box for centralized collection; another example is China Authorization Announcement No.: CN214373825U, which discloses a concrete compression testing equipment for measurement and testing of construction projects, which solves the problem that the position of the concrete needs to be manually adjusted when the concrete compression testing equipment is used, which is very time-consuming and has low placement accuracy; but the existing compression testing equipment cannot realize the centering of the specimen and cannot realize automatic protection compression testing. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes a concrete compression testing device, which can automatically center and detect the concrete specimen and perform compression testing.

[0004] The concrete compression testing device of the utility model comprises:

[0005] pedestal;

[0006] A press assembly, the press assembly comprising columns fixed to both sides of the top surface of the pedestal; a cross beam fixed to the top of the columns; a press fixed on the cross beam;

[0007] A pressure-bearing platform, which is fixed to the top surface of the pedestal and is arranged directly below the press;

[0008] A core fixing unit, the core fixing unit comprises a support fixed on both sides of the pressure-bearing platform, a manual screw guide slide is fixed on the top of the support, a flip limit seat is fixed on the sliding end of the manual screw guide slide, a core fixing swing arm is rotatably mounted on the flip limit seat through a pin shaft, and the core fixing swing arm is attached to the top surface of the pressure-bearing platform;

[0009] A protective cover is arranged outside the pressure platform, and sliders are fixed on both sides of the protective cover, and the sliders are slidably installed on the support platform up and down; the protective cover is fixed to the lifting end of the lifting drive unit; the upper pressure plate is fixed at the telescopic end of the press; and the lower pressure plate is fixed on the top surface of the pressure platform.

[0010] When testing with concrete compression testing equipment, after taking the concrete specimen out from the curing site, conduct the test in time and clean the surface of the concrete specimen, the upper pressure plate and the lower pressure plate; then, adjust the manual screw guide according to the size of the concrete specimen, and drive the spacing between the centering swing arms through the manual screw guide to make it fit the size of the concrete specimen; then, place the concrete specimen on the lower pressure plate and position the concrete specimen through the centering unit; make the axis of the concrete specimen face the center point of the upper pressure plate, start the press, and when the upper pressure plate is pressed against the concrete specimen, the lifting drive unit is activated to drive the slider of the protective sleeve to slide upward along the support platform; drive the protective sleeve to Step up, turn the fixed core swing arm outward through the top surface of the protective cover, detach it from the concrete specimen, and make the outer part of the fixed core swing arm fit to the top of the flip limit seat; at this time, the protective cover covers and protects the outer part of the concrete specimen; then, the press performs compression test, and the press applies load continuously and evenly. When the concrete strength grade of the concrete specimen is less than C30, the loading speed is 0.3~0.5MPa per second; when the concrete strength grade is greater than or equal to C30 and less than C60, the loading speed is 0.5~0.8MPa per second; when the concrete strength grade is greater than C60, the loading speed is 0.8~1.0Mpa per second; when the specimen is close to failure and begins to deform sharply, stop adjusting the throttle of the testing machine until it is destroyed and record the failure load.

[0011] Furthermore, the core-fixing swing arm includes an arm body, one end of which is integrally formed with a hinged ear hole, and the other end is fixed with a core-fixing template; the arm body can swing along the hinged ear hole, thereby driving the core-fixing template to flip synchronously, and the core-fixing template can fit the outer wall of the concrete specimen.

[0012] Furthermore, the core fixing template includes an insert, one end of which is embedded in the end of the arm body and locked by bolts; the other end of the insert is integrally made into a limit plate; the limit plate is a ring plate or an open frame seat that fits the outer surface of the specimen; the core fixing template can select a limit plate that matches the shape of the concrete specimen according to the shape of the concrete specimen; so that it can adapt to the shape of the concrete specimen.

[0013] Furthermore, the lifting drive unit is an electric telescopic rod or an electric lifting slide; the protective sleeve is driven to be lifted or lowered by a piston rod of the electric telescopic rod; or the protective sleeve is driven to be lifted or lowered by a slider of the electric lifting slide.

[0014] Furthermore, a notch is pressed into the upper part of the protective cover, a grating ruler is embedded and fixed inside the notch, and a grating transmitter head is arranged on the outside of the telescopic end of the press; through the cooperation of the grating ruler and the grating transmitter head, the position of the protective cover after rising can be achieved, and when the grating ruler detects that the set position is reached, the lifting drive unit stops to complete the positioning of the protective cover; when the specimen is close to failure and begins to deform sharply, the grating transmitter head fluctuates in the position of the grating ruler, and at the moment when the fluctuation range reaches the set value, the current load can be quickly acquired and the failure load can be recorded.

[0015] Furthermore, the bottom of the protective sleeve is hollow, and the top of the protective sleeve is integrally formed with a protective baffle ring; the protective baffle ring can prevent concrete debris from being forced out from the top of the protective sleeve.

[0016] Furthermore, the flip limit seat includes a groove seat body fixed to the sliding end of the manual screw guide slide, and a flip stop edge is fixed to the top surface of the groove seat body; the groove seat body can facilitate the swinging of the centering swing arm, and the flip stop edge can limit the swinging angle of the centering swing arm.

[0017] Compared with the prior art, the concrete compression test equipment of the utility model places the concrete specimen on the pressure platform, selects the limit plate according to the size and shape of the concrete specimen, and adjusts the spacing between the limit plates; after the adjustment is completed, the compression test can be carried out. During the test, the concrete specimen is automatically centered by the core fixing unit. After the centering is completed, the test protection is automatically performed by the protective cover. When the protective cover protects the concrete specimen, the core fixing unit can be automatically removed to avoid interference with the concrete specimen. The press performs compression test on the concrete specimen under the protection of the protective cover; during the compression test, the pressure value of the sharp deformation is monitored by the grating ruler to automatically complete the compression test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the concrete compression testing equipment of the present utility model.

[0019] Figure 2 For the utility model Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0020] Figure 3 This is a schematic diagram of the overall structure of Example 2 of the concrete compression resistance testing equipment of the present utility model.

[0021] Figure numerals: 1. pedestal, 2. column, 3. cross beam, 4. press, 5. pressure platform, 6. support platform, 7. manual screw lead screw slide, 8. flip limit seat, 9. centering swing arm, 10. protective cover, 11. slider, 12. lifting drive unit, 13. upper pressure plate, 14. lower pressure plate, 15. arm body, 16. centering template, 17. insert, 18. limit plate, 19. grating scale, 20. grating transmitter head, 21. protective retaining ring, 22. slot seat body, 23. flip retaining edge. DETAILED DESCRIPTION

[0022] Embodiment 1:

[0023] like Figure 1 and Figure 2 The concrete compression testing equipment shown includes:

[0024] Pedestal 1;

[0025] A press assembly, the press assembly comprising columns 2 fixed to both sides of the top surface of the pedestal 1; a cross beam 3 is fixed on the top of the column 2; a press 4 is fixed on the cross beam 3;

[0026] A pressure-bearing platform 5, which is fixed to the top surface of the pedestal 1 and is arranged directly below the press 4;

[0027] The core fixing unit includes a support 6 fixed on both sides of the pressure platform 5, a manual screw guide 7 is fixed on the top of the support 6; a flip limit seat 8 is fixed on the sliding end of the manual screw guide 7; a core fixing swing arm 9 is rotatably mounted on the flip limit seat 8 through a pin shaft; the core fixing swing arm 9 is attached to the top surface of the pressure platform 5;

[0028] The protective cover 10 is arranged outside the pressure platform 5, and sliders 11 are fixed on both sides of the protective cover 10. The sliders 11 are installed to slide up and down with the support platform 6; the protective cover 10 is fixed to the lifting end of the lifting drive unit 12; the upper pressure plate 13 is fixed to the telescopic end of the press 4; the lower pressure plate 14 is fixed to the top surface of the pressure platform 5.

[0029] When testing with concrete compression testing equipment, after taking the concrete specimen out from the maintenance site, conduct the test in time, and clean the surface of the concrete specimen, the upper pressure plate 13, and the lower pressure plate 14; then, adjust the manual screw guide slide 7 according to the size of the concrete specimen, and drive the spacing between the centering swing arms 9 through the manual screw guide slide 7 to make it fit the size of the concrete specimen; then, place the concrete specimen on the lower pressure plate 14, and position the concrete specimen through the centering unit; make the axis of the concrete specimen face the center point of the upper pressure plate 13, start the press 4, and when the upper pressure plate 13 is pressed against the concrete specimen, the lifting drive unit 12 is actuated to drive the slider 11 of the protective cover 10 to slide upward along the support 6; drive The dynamic protective cover 10 is synchronously pushed up, and the fixed core swing arm 9 is turned outward through the top surface of the protective cover 10 to separate from the concrete specimen, so that the outer part of the fixed core swing arm 9 fits the top of the flip limit seat 8; at this time, the protective cover 10 covers and protects the outer part of the concrete specimen; then, the press 4 performs a compressive test, and the press 4 continuously and evenly applies load. When the concrete strength grade of the concrete specimen is less than C30, the loading speed is 0.3~0.5MPa per second; when the concrete strength grade is greater than or equal to C30 and less than C60, the loading speed is 0.5~0.8MPa per second; when the concrete strength grade is greater than C60, the loading speed is 0.8~1.0Mpa per second; when the specimen is close to failure and begins to deform sharply, the throttle of the testing machine should be stopped from being adjusted until it is destroyed and the failure load is recorded.

[0030] The core fixing swing arm 9 includes an arm body 15, one end of which is integrally formed with a hinged ear hole, and the other end is fixed with a core fixing template 16; the arm body 15 can swing along the hinged ear hole, thereby driving the core fixing template 16 to flip synchronously, and the core fixing template 16 can fit the outer wall of the concrete specimen.

[0031] The core fixing template 16 includes an insert 17, one end of which is embedded in the end of the arm body 15 and locked by bolts; the other end of the insert 17 is integrally made into a limiting plate 18; the limiting plate 18 is a ring plate or an open frame seat that fits the outer surface of the specimen; the core fixing template 16 can select a matching limiting plate 18 according to the shape of the concrete specimen, so that it can adapt to the shape of the concrete specimen.

[0032] The lifting drive unit 12 is an electric telescopic rod or an electric lifting slide; the protective cover 10 is driven to be lifted or lowered by the piston rod of the electric telescopic rod; or the protective cover 10 is driven to be lifted or lowered by the slider 11 of the electric lifting slide.

[0033] The bottom of the protective sleeve 10 is hollow, and a protective baffle ring 21 is integrally formed on the top of the protective sleeve 10 ; the protective baffle ring 21 can prevent concrete debris from being forced out from the top of the protective sleeve 10 .

[0034] The flip limit seat 8 includes a groove seat body 22 fixed to the sliding end of the manual screw guide slide 7, and a flip stop edge 23 is fixed to the top surface of the groove seat body 22; the groove seat body 22 can facilitate the centering swing arm 9 to swing, and the flip stop edge 23 can limit the swing angle of the centering swing arm 9.

[0035] Embodiment 2:

[0036] like Figure 3 In the concrete compression resistance testing equipment shown in the figure, the protective cover 10 is pressed with a notch on the upper part, and a grating ruler 19 is embedded and fixed on the inner side of the notch, and a grating transmitter head 20 is arranged on the outside of the telescopic end of the press 4; through the cooperation of the grating ruler 19 and the grating transmitter head 20, the position of the protective cover 10 after rising can be achieved, and when the grating ruler 19 detects that the set position is reached, the lifting drive unit 12 stops and the position of the protective cover 10 is completed; when the specimen is close to failure and begins to deform sharply, the grating transmitter head 20 fluctuates at the position of the grating ruler 19, and the moment the fluctuation range reaches the set value, the current load can be quickly acquired and the failure load can be recorded.

[0037] The above embodiments are only preferred implementations of the present invention, so any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A concrete compression testing device, characterized in that: include: pedestal; A press assembly, the press assembly comprising columns fixed to both sides of the top surface of the pedestal; a cross beam fixed to the top of the columns; a press fixed on the cross beam; A pressure-bearing platform, which is fixed to the top surface of the pedestal and is arranged directly below the press; A core fixing unit, the core fixing unit comprises a support fixed on both sides of the pressure-bearing platform, a manual screw guide slide is fixed on the top of the support, a flip limit seat is fixed on the sliding end of the manual screw guide slide, a core fixing swing arm is rotatably mounted on the flip limit seat through a pin shaft, and the core fixing swing arm is attached to the top surface of the pressure-bearing platform; A protective cover is arranged outside the pressure-bearing platform, and sliders are fixed on both sides of the protective cover. The sliders are slidably installed on the support platform up and down; the protective cover is fixed to the lifting end of the lifting drive unit.

2. The concrete compression testing equipment according to claim 1 is characterized in that: The core fixing swing arm comprises an arm body, one end of the arm body is integrally formed with a hinged ear hole, and the other end is fixed with a core fixing template.

3. The concrete compression testing device according to claim 2 is characterized in that: The core fixing template includes an insert, one end of which is embedded in the end of the arm body and locked by bolts; the other end of the insert is integrally made into a limiting plate; the limiting plate is a ring plate or an open frame seat that fits the outer surface of the specimen.

4. The concrete compression testing equipment according to claim 1 is characterized in that: The lifting drive unit is an electric telescopic rod or an electric lifting slide.

5. The concrete compression testing equipment according to claim 1 is characterized in that: An upper pressure plate is fixed to the telescopic end of the press; and a lower pressure plate is fixed to the top surface of the pressure platform.

6. The concrete compression testing equipment according to claim 1 is characterized in that: A notch is pressed into the upper part of the protective sleeve, a grating ruler is embedded and fixed inside the notch, and a grating transmitter head is arranged outside the telescopic end of the press.

7. The concrete compression testing equipment according to claim 1 is characterized in that: The bottom of the protective sleeve is hollow, and the top of the protective sleeve is integrally formed with a protective baffle ring.

8. The concrete compression testing equipment according to claim 1 is characterized in that: The flip limit seat comprises a slot seat body fixed to the sliding end of the manual screw rod slide, and a flip stop edge is fixed on the top surface of the slot seat body.

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