Concrete sample block compressive strength detection device

Abstract

The utility model discloses a concrete sample block compressive strength detection device which comprises a rack, a tray, an L-shaped plate, a positioning block and a second hydraulic cylinder, a first hydraulic cylinder is mounted at the top of the rack, an upper pressing plate is fixed at the bottom end of the telescopic end of the first hydraulic cylinder, and a base plate is fixed in the middle of the rack; the second hydraulic cylinder is vertically installed at the bottom of the rack, the telescopic end of the second hydraulic cylinder penetrates through the base plate in a guiding and sliding mode and is fixedly connected with the bottom of the tray, and the tray is located under the upper pressing plate. The four positioning blocks are rotationally connected with the edge of the tray respectively; and the L-shaped plate is used for limiting the positioning plate. The compressive strength detection device for the concrete sample block can overcome the defect that an existing compressive strength detection device is inconvenient to accurately position the concrete sample block.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete testing equipment, in particular to a concrete sample block compressive strength testing device. Background Art

[0002] Concrete is a kind of building material that is essential for construction sites. It is an artificial stone made of cement as the main cementing material, mixed with water, sand, gravel, and chemical admixtures and mineral admixtures when necessary, in appropriate proportions, and then evenly mixed, compacted, and cured and hardened. Compressive strength is an important indicator of concrete quality and plays a vital role in ensuring the structural safety and durability of buildings.

[0003] In the prior art, a compressive strength test is performed on a 150mm×150mm×150mm cubic concrete sample using a compressive testing device; the compressive testing device includes a hydraulic cylinder and a pad, an upper pressure plate is installed at the telescopic end of the hydraulic cylinder, and the pad is located directly below the upper pressure plate; during the test, a worker is required to accurately position the concrete sample at the center of the pad, that is, the concrete sample is aligned with the center of the upper pressure plate to ensure that the concrete sample is evenly stressed during the test, thereby ensuring that the test results are true and valid.

[0004] However, the existing compression testing device is not convenient for accurately positioning the concrete sample: the staff usually places the concrete sample at the center of the pad according to their own feelings, which leads to large errors. In order to reduce the error, it is necessary to use a ruler to measure whether the position of the concrete sample is correct. If it is not correct, the concrete sample needs to be adjusted, which takes a certain amount of time. In addition, many concrete samples need to be tested during the compression test, which not only leads to a large workload for the staff, but also leads to low work efficiency.

[0005] Therefore, it is necessary to develop a concrete sample compressive strength testing device to address the above defects. Utility Model Content

[0006] The utility model aims to provide a concrete sample compressive strength detection device, which can solve the defect that the existing compressive strength detection device is not convenient for accurately positioning the concrete sample.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] The utility model discloses a device for testing the compressive strength of concrete sample blocks, comprising a frame, a first hydraulic cylinder is installed on the top of the frame, an upper pressure plate is fixed to the bottom end of the telescopic end of the first hydraulic cylinder, a pad is fixed to the middle of the frame, and also comprises a tray, an L plate, a positioning block and a second hydraulic cylinder, the second hydraulic cylinder is vertically installed at the bottom of the frame, the telescopic end of the second hydraulic cylinder guides and slides through the pad and is fixedly connected to the bottom of the tray, the tray is located directly below the upper pressure plate; four through grooves are vertically opened on the circumference of the tray, the four through grooves are evenly distributed around the circumference, and the four through grooves are horizontally arranged A round rod, the bottom end of the positioning block is semicircular, the bottom end of the positioning block is provided with a through hole rotatably connected to the round rod, the through hole is coaxial with the semicircular, four positioning blocks are provided and correspond to the four round rods one by one; four L-plates are evenly distributed and fixed on the pad and correspond to the positioning blocks one by one, the inner side surface of the top of the L-plate is in sliding contact with the outer side surface of the positioning block, the distance between the inner side surfaces of the top of each two opposite L-plates is equal to twice the diameter of the semicircular and the sum of the side length of the concrete sample, and there is a gap between the two side surfaces of the L-plate and the two side walls of the through groove.

[0009] Furthermore, the frame includes a test cavity, vertical plates symmetrically arranged on both sides of the bottom surface of the pad, and a bottom plate fixedly connected to the bottom surfaces of the two vertical plates; the test cavity includes side plates symmetrically arranged on both sides of the top surface of the pad, a top plate fixedly mounted on the top surfaces of the two side plates, and two outward-opening doors located at the openings at both ends of the test cavity; the first hydraulic cylinder is fixed to the top surface of the top plate by bolts, the telescopic end of the first hydraulic cylinder slides through the top plate, and the second hydraulic cylinder is fixed to the bottom plate by bolts.

[0010] Furthermore, it also includes a dust suction pipe, one end of which is connected to the test chamber, and the other end of which is connected to a vacuum cleaner.

[0011] Furthermore, a counterweight portion is provided at the outer top angle edge of the positioning block, and the weight of the counterweight portion is half of the positioning block; the distance between the center axis of the round rod and the top surface of the pallet is greater than or equal to the radius of the semicircular arc, and a third hydraulic cylinder is horizontally fixed on one of the side plates, and a push plate is fixed to the telescopic end of the third hydraulic cylinder, the length of the push plate is greater than or equal to the diameter of the pallet, and the distance from the bottom surface of the push plate to the top surface of the pad is greater than or equal to the sum of the height of the L plate and the diameter of the semicircular arc.

[0012] Furthermore, the bottom end of the tray is in the shape of an inverted truncated cone, and the top surface of the pad is provided with a conical groove matching the shape of the truncated cone.

[0013] Furthermore, the backing plate is provided with a through hole matching the telescopic end of the second hydraulic cylinder, a sliding key is provided in the through hole, and a sliding groove matching the sliding key is provided on the telescopic end of the second hydraulic cylinder.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are:

[0015] The utility model provides a concrete sample compressive strength testing device, wherein the tray is driven down by the second hydraulic cylinder, the positioning block gradually descends and swings upward with the tray, the positioning block generates a force on the concrete sample, and when the positioning block is in an upright state, the concrete sample is accurately positioned at the center of the tray. The positioning process is completed by the device itself, which is convenient and fast, accurate in positioning, and highly efficient, reducing the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 It is a left-side structural schematic diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the main structure of the utility model when the door is opened;

[0020] Figure 4 It is a cross-sectional structural schematic diagram of a part of the structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the exploded structure of the pad and tray of the utility model;

[0022] Figure 6 for Figure 3 The enlarged structural diagram at A in the middle;

[0023] Figure 7 for Figure 4 Enlarged structural diagram at B in the middle.

[0024] Explanation of the reference numerals: 1. frame; 101. side plate; 102. top plate; 103. vertical plate; 104. bottom plate; 2. first hydraulic cylinder; 3. upper pressure plate; 4. pad; 401. sliding key; 5. tray; 501. through groove; 502. round rod; 6. L-plate; 7. positioning block; 701. counterweight; 8. second hydraulic cylinder; 801. slide groove; 9. concrete sample; 10. dust suction pipe; 11. outward opening door; 1101. tempered glass window; 12. third hydraulic cylinder; 13. push plate; 14. filter plate; 15. controller. DETAILED DESCRIPTION

[0025] The core of the utility model is to provide a concrete sample compressive strength detection device, which can solve the defect that the existing compressive strength detection device is not convenient for accurately positioning the concrete sample.

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "middle", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] In a specific embodiment of the present invention, Figures 1 to 7 As shown, it includes a frame 1, a first hydraulic cylinder 2 is installed on the top of the frame 1, an upper pressing plate 3 is fixed to the bottom end of the telescopic end of the first hydraulic cylinder 2, a pad 4 is fixed to the middle of the frame 1, and also includes a pallet 5, an L plate 6, a positioning block 7 and a second hydraulic cylinder 8. The second hydraulic cylinder 8 is vertically installed at the bottom of the frame 1, and the telescopic end of the second hydraulic cylinder 8 is guided to slide through the pad 4 and is fixedly connected to the bottom of the pallet 5, and the pallet 5 is located directly below the upper pressing plate 3; four through grooves 501 are vertically opened on the circumference of the pallet 5, and the four through grooves 501 are evenly distributed around the circumference, and round rods 502 are horizontally arranged in the four through grooves 501, the bottom end of the positioning block 7 is semicircular, and the bottom end of the positioning block 7 is provided with a through hole rotatably connected to the round rod 502, the through hole is coaxial with the semicircular arc, and the positioning block 7 is provided with four and corresponds to the four round rods 502 one by one; the L plate 6 is Figure 5 As shown, four L-plates 6 are evenly distributed and fixed on the pad 4 and correspond to the positioning blocks 7 one by one. The inner side surface of the top of the L-plate 6 is in sliding contact with the outer side surface of the positioning block 7. The distance between the inner side surfaces of the top of each two opposite L-plates 6 is equal to the sum of twice the diameter of the semicircular arc and the side length of the concrete sample 9. There is a gap between the two side surfaces of the L-plate 6 and the two side walls of the through groove 501, that is, when the tray 5 moves up and down, the L-plate 6 will not interfere with the tray 5. The diameter of the semicircular arc is equal to the width of the positioning block 7.

[0029] Specifically, initially, there is a gap between the bottom surface of the tray 5 and the pad 4, the concrete sample 9 is placed on the tray 5, and the four side surfaces of the concrete sample 9 are roughly aligned with the four through grooves 501, the telescopic end of the second hydraulic cylinder 8 is contracted, the tray 5 is synchronously lowered, and the positioning block 7 gradually lowers with the tray 5. At the same time, due to the sliding contact between the outer side surface of the positioning block 7 and the inner side surface of the top of the L-plate 6, the positioning block 7 swings upward and exerts a force on the concrete sample 9. When the positioning block 7 is in an upright state, the distance between the inner sides of each two relative positioning blocks 7 is the side length of the concrete sample 9, and the concrete sample 9 is accurately positioned at the center of the tray 5; at this time, the bottom surface of the tray 5 is against the top surface of the pad 4, and the first hydraulic cylinder 2 can be started to start the compressive strength test of the concrete sample 9.

[0030] The frame 1 includes a test chamber, vertical plates 103 symmetrically arranged on both sides of the bottom surface of the pad 4, and a bottom plate 104 fixedly connected to the bottom surfaces of the two vertical plates 103. The test chamber includes side plates 101 symmetrically arranged on both sides of the top surface of the pad 4, a top plate 102 fixedly mounted on the top surfaces of the two side plates 101, and two outward-opening doors 11 located at the openings at both ends of the test chamber; the first hydraulic cylinder 2 is fixed to the top surface of the top plate 102 by bolts, the telescopic end of the first hydraulic cylinder 2 slides through the top plate 102, and the second hydraulic cylinder 8 is fixed to the bottom plate 104 by bolts. Specifically, when performing a compressive strength test, the two outward-opening doors 11 are closed, and the test chamber is in a closed state at this time to prevent the broken pieces of the concrete sample 9 from injuring the staff. A tempered glass window 1101 can be set on the outward-opening door 11 to facilitate the staff to observe the situation in the test chamber in real time.

[0031] It also includes a dust suction pipe 10, one end of which is connected to the test chamber, and the other end of the dust suction pipe 10 is connected to the dust collector. The dust collector adopts an industrial vacuum cleaner in the prior art, and the vacuum cleaner is not shown in the drawings. Specifically, the dust suction pipe 10 can be a corrugated telescopic pipe or a steel pipe; a through hole connected to the dust suction pipe 10 is opened on one of the side panels 101, and a filter plate 14 is installed inside the through hole. A plurality of holes with a diameter of 1 to 5 mm are opened on the filter plate 14. The filter plate 14 prevents the fragments of the concrete sample 9 from collapsing during the test from entering the dust suction pipe 10; the through hole connected to the dust suction pipe 10 can also be opened on the top plate 102. When the compressive strength test starts, the vacuum cleaner is turned on, and the dust generated by the collapse of the concrete sample 9 in the test chamber is sucked away by the vacuum cleaner through the dust suction pipe 10.

[0032] The outer corner of the positioning block 7 is provided with a counterweight 701. Specifically, the counterweight 701 is fixedly connected to the positioning block 7 by bonding; the weight of the counterweight 701 is more than half of the weight of the positioning block 7, so the center of gravity of the positioning block 7 is biased toward the outside. The positioning block 7 can be made of light plastic or light alloy, and the counterweight 701 is made of metal with a density greater than that of the light plastic or light alloy, such as platinum, tungsten, lead, etc.

[0033] The distance between the center axis of the round rod 502 and the top surface of the pallet 5 is greater than or equal to the radius of the semicircular arc. A third hydraulic cylinder 12 is horizontally fixed on one of the side plates 101, and a push plate 13 is fixed to the telescopic end of the third hydraulic cylinder 12. The length of the push plate 13 is greater than or equal to the diameter of the pallet 5, and the distance from the bottom surface of the push plate 13 to the top surface of the pad 4 is greater than or equal to the sum of the height of the L plate 6 and the diameter of the semicircular arc. Specifically, when a concrete sample 9 completes the compressive strength test, the telescopic end of the second hydraulic cylinder 8 extends, the pallet 5 rises synchronously, the outer side surface of the positioning block 7 slides with the inner side surface of the top of the L-plate 6, and when the distance between the center axis of the round rod 502 and the top surface of the L-plate 6 is equal to the radius of the semicircular arc, since the center of gravity of the positioning block 7 is biased to the outside, the positioning block 7 swings outward, and the outer side surface of the positioning block 7 is against the top surface of the L-plate 6. At this time, the positioning block 7 is in a horizontal state, and the inner side surface of the positioning block 7 is lower than or flush with the top surface of the pallet 5. At this time, the telescopic end of the third hydraulic cylinder 12 extends, and the push plate 13 synchronously moves in a straight line and pushes the remains of the concrete sample 9 on the pallet 5 out of the pallet 5, and then the third hydraulic cylinder 12 is reset.

[0034] The bottom end of the tray 5 is in the shape of an inverted truncated cone, and a conical groove matching the shape of the truncated cone is provided on the top surface of the pad 4. Specifically, the conical groove is used to limit the tray 5 with a truncated cone shape at the bottom end to prevent the tray 5 from tilting when the concrete sample 9 is subjected to a compressive strength test.

[0035] The backing plate 4 is provided with a through hole matching the telescopic end of the second hydraulic cylinder 8, a sliding key 401 is provided in the through hole, and a slide groove 801 matching the sliding key 401 is provided on the telescopic end of the second hydraulic cylinder 8. Specifically, the sliding key 401 and the slide groove 801 cooperate with each other to prevent the telescopic end of the second hydraulic cylinder 8 from rotating when it is extended and retracted, thereby preventing the tray 5 from rotating, thereby ensuring that the L plate 6 and the positioning block 7 are always aligned.

[0036] like Figure 1 As shown, the utility model is controlled by a controller 15 , and the first hydraulic cylinder 2 , the second hydraulic cylinder 8 , the third hydraulic cylinder 12 and the vacuum cleaner are all electrically connected to the controller 15 and are controlled to start and stop by the controller 15 .

[0037] The working principle of a concrete sample compressive strength testing device of the utility model is as follows: initially, there is a gap between the bottom surface of the tray 5 and the pad 4, the concrete sample 9 is placed on the tray 5, and the four side surfaces of the concrete sample 9 are roughly aligned with the four through grooves 501, the telescopic end of the second hydraulic cylinder 8 is contracted, the tray 5 is synchronously lowered, and the positioning block 7 is gradually lowered with the tray 5, at the same time, due to the sliding contact between the outer side surface of the positioning block 7 and the inner side surface of the top of the L-plate 6, the positioning block 7 swings upward and exerts a force on the concrete sample 9, when the positioning block 7 is in an upright state, the distance between the inner side surfaces of each two relative positioning blocks 7 is the side length of the concrete sample 9, and the concrete sample 9 is accurately positioned at the center of the tray 5; at this time, the bottom surface of the tray 5 is against the top surface of the pad 4, and the first hydraulic cylinder 2 can be started to start the compressive strength test of the concrete sample 9.

[0038] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other, and the embodiments can be combined with each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0039] The above embodiments are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A concrete sample compressive strength testing device, comprising a frame (1), a first hydraulic cylinder (2) is mounted on the top of the frame (1), an upper pressing plate (3) is fixed to the bottom of the telescopic end of the first hydraulic cylinder (2), a pad (4) is fixed to the middle of the frame (1), and the device is characterized in that: It also includes a tray (5), an L-plate (6), a positioning block (7) and a second hydraulic cylinder (8), wherein the second hydraulic cylinder (8) is vertically mounted at the bottom of the frame (1), the telescopic end of the second hydraulic cylinder (8) is guided and slidably passed through the pad (4) and is fixedly connected to the bottom of the tray (5), and the tray (5) is located directly below the upper pressure plate (3); four through grooves (501) are vertically opened on the circumference of the tray (5), the four through grooves (501) are evenly distributed around the circumference, and round rods (502) are horizontally mounted in the four through grooves (501); the bottom end of the positioning block (7) is semicircular, and the bottom end of the positioning block (7) is provided with a The through hole is rotatably connected to the round rod (502), and the through hole is coaxial with the semicircular arc. The positioning blocks (7) are provided with four and correspond to the four round rods (502) respectively. The four L-plates (6) are evenly distributed and fixed on the pad (4) and correspond to the positioning blocks (7) one by one. The inner side surface of the top of the L-plate (6) is in sliding contact with the outer side surface of the positioning block (7). The distance between the inner side surfaces of the top of each two opposite L-plates (6) is equal to twice the diameter of the semicircular arc and the sum of the side length of the concrete sample (9). There is a gap between the two side surfaces of the L-plate (6) and the two side walls of the through groove (501).

2. The concrete sample compressive strength testing device according to claim 1, characterized in that: The frame (1) comprises a test chamber, vertical plates (103) symmetrically arranged on both sides of the bottom surface of the pad (4), and a bottom plate (104) fixedly connected to the bottom surfaces of the two vertical plates (103); the test chamber comprises side plates (101) symmetrically arranged on both sides of the top surface of the pad (4), a top plate (102) fixedly mounted on the top surfaces of the two side plates (101), and two outward-opening doors (11) located at the openings at both ends of the test chamber; the first hydraulic cylinder (2) is fixed to the top surface of the top plate (102) by bolts, the telescopic end of the first hydraulic cylinder (2) slides through the top plate (102), and the second hydraulic cylinder (8) is fixed to the bottom plate (104) by bolts.

3. The concrete sample compressive strength testing device according to claim 2, characterized in that: It also comprises a dust suction pipe (10), one end of which is connected to the test chamber, and the other end of which is connected to a dust collector.

4. The concrete sample compressive strength testing device according to claim 2, characterized in that: A counterweight (701) is arranged at the outer top corner edge of the positioning block (7), and the weight of the counterweight (701) is half of that of the positioning block (7); the distance between the center axis of the round rod (502) and the top surface of the tray (5) is greater than or equal to the radius of the semicircular arc; a third hydraulic cylinder (12) is horizontally fixed on one of the side plates (101), and a push plate (13) is fixed to the telescopic end of the third hydraulic cylinder (12); the length of the push plate (13) is greater than or equal to the diameter of the tray (5), and the distance from the bottom surface of the push plate (13) to the top surface of the pad (4) is greater than or equal to the sum of the height of the L plate (6) and the diameter of the semicircular arc.

5. The concrete sample compressive strength testing device according to claim 1, characterized in that: The bottom end of the tray (5) is in the shape of an inverted truncated cone, and the top surface of the pad (4) is provided with a conical groove matching the shape of the truncated cone.

6. The concrete sample compressive strength testing device according to claim 1, characterized in that: The backing plate (4) is provided with a through hole matching the telescopic end of the second hydraulic cylinder (8), a sliding key (401) is provided in the through hole, and a sliding groove (801) matching the sliding key (401) is provided on the telescopic end of the second hydraulic cylinder (8).

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