Pressure test device for construction engineering concrete

Abstract

The utility model relates to the technical field of test experiment equipment, in particular to a pressure test device for construction engineering concrete. Comprising a base, a frame is arranged on the base, a lifting mechanism is arranged on the frame, a pressed assembly is arranged at the bottom end of the lifting mechanism, and the lifting mechanism is used for driving the pressed assembly to vertically move to downwards press a concrete sample placed on the frame; the base is sleeved with a blocking cover, and a traction mechanism is connected between the blocking cover and the top end of the lifting mechanism. Due to the fact that the compression assembly has the function of changing the pressure application covering area, concrete samples of different sizes can be tested to be in the limited compression state; due to the fact that the blocking cover is connected with the lifting mechanism through the traction mechanism, when the lifting mechanism drives the pressed assembly to move downwards, the blocking cover can oppositely move upwards through the traction mechanism, when the fragments burst out, the fragments are blocked by the blocking cover, and the situation that the fragments splash all around and are inconvenient to clean is avoided.

Description

Technical Field

[0001] This utility model relates to the field of testing and experimental equipment technology, and in particular to a pressure testing device for concrete in construction projects. Background Technology

[0002] Engineering testing is an important task to ensure the safety of completed, under-construction, and planned building projects. It involves testing the foundation, building materials, construction techniques, and building structure of the buildings throughout the entire construction process. Since concrete is frequently used in modern construction projects, concrete compressive strength testing is very important when conducting engineering testing.

[0003] Patent document (CN221840833U) discloses a pressure testing device for concrete testing in building engineering, including a pressure testing assembly. The pressure testing assembly includes a base, a mounting frame, a first hydraulic push rod, an adjustment mechanism, and a U-shaped protective plate. This invention involves activating the first hydraulic push rod, whose piston rod drives the adjustment mechanism to move onto the U-shaped protective plate. Several bearing rods of varying lengths are used to accommodate concrete blocks of different sizes. Then, the adjustment mechanism is activated to adjust the position of the second hydraulic push rod, whose piston rod drives a pressure plate to crush the concrete block. The adjustment mechanism and the U-shaped protective plate protect against the crushed fragments from the concrete blocks of different sizes, preventing accidental injury from the fragments. It also allows for omnidirectional pressure testing of the concrete blocks. The arc-shaped groove and inclined through-hole facilitate the cleaning of the crushed fragments.

[0004] When using the above-mentioned technology, the following technical problems were found in the existing technology: different sized concrete samples can withstand different pressure values, resulting in insufficient rigor in subsequent pressure tests when larger concrete samples exceed the area covered by pressure; in addition, the pressure value generated by the pressure-applying mechanism is much greater than the strength pressure of the concrete, which means that when the concrete block is crushed, fragments are likely to be ejected, which can easily injure test personnel if not protected in time, and the flying fragments are difficult to clean up. Therefore, a pressure testing device for concrete in construction engineering is designed to provide an alternative technical solution to the above-mentioned technical problems. Utility Model Content

[0005] Therefore, it is necessary to provide a pressure testing device for concrete in construction projects to address the above-mentioned technical problems, thereby solving the technical issues of inconvenience in adjusting the pressure application area and the unobstructed scattering of crushed concrete fragments.

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

[0007] A pressure testing device for concrete in construction projects includes a base, a frame mounted on the base, a lifting mechanism mounted on the frame, and further includes:

[0008] A pressure-bearing component, whose variable pressure coverage area is provided on the lifting mechanism, the lifting mechanism being configured to drive the pressure-bearing component to move vertically;

[0009] A shield, fitted onto the base, the shield serving to enclose a portion of the frame; and

[0010] At least two traction mechanisms are provided between the lifting mechanism and the baffle, the traction mechanisms being used to drive the baffle to move in the opposite direction relative to the pressure component via the lifting mechanism.

[0011] As a preferred embodiment of the pressure testing device for concrete in construction engineering provided by this utility model, the frame includes a base plate fixed to the bottom of the base, four pillars fixed to the base plate, and a top plate fixed between the tops of the four pillars. A platform for placing concrete samples is fixed in the middle of the base plate.

[0012] As a preferred embodiment of the concrete pressure testing device for construction projects provided by this utility model, the lifting mechanism includes a reduction gearbox fixed on the top plate, a motor connected to the reduction gearbox, a lead screw passing through the reduction gearbox and the top plate, and two guide rods connected to the bottom of the lead screw and extending upward through the top plate.

[0013] The pressure-bearing component is also connected to the bottom of the lead screw, which is used to move the pressure-bearing component closer to or away from the platform via a gearbox and guide rod.

[0014] As a preferred embodiment of the pressure testing device for concrete in construction engineering provided by this utility model, the pressure-bearing component includes a transmission part, a pushing part, a pressure-applying part, and a sliding component. The pushing part is connected between the transmission part and the sliding component. The pressure-applying part is disposed on the sliding component and connected to the pushing part. The transmission part is used to change the position of the pushing part on the sliding component through the pushing part, so as to change the pressure-applying coverage area formed by the pressure-applying part.

[0015] As a preferred embodiment of the pressure testing device for concrete in construction engineering provided by this utility model, the transmission part includes a screw fixed to the bottom of the lead screw, a screw sleeve threadedly connected to the screw, and a collar sleeved on the screw sleeve;

[0016] The pushing part includes at least three circumferentially equidistant connecting rods hinged to a collar, and a connecting body hinged to the connecting rods, the connecting body being used to slide on a sliding assembly;

[0017] The sliding assembly includes at least three circumferentially equidistant slide rails fixed to the bottom of the screw, and a plurality of fixed rods fixed between the slide rails;

[0018] The pressure application part includes at least three pressure blocks located at the bottom of the slide rail and fixed to the connecting body, as well as a pressure sensor embedded in the bottom of the pressure blocks.

[0019] As a preferred embodiment of the pressure testing device for concrete in construction engineering provided by this utility model, at least two of the traction mechanisms each include a bracket on a fixed top plate, at least one fixed pulley on the bracket, and a rope with one end fixed to the top of the lead screw and the other end fixed to the guard through the fixed pulley.

[0020] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0021] At the same time, through the above technical solutions, this utility model has at least the following beneficial effects:

[0022] The present invention provides a pressure testing device for concrete in construction projects. Because the pressure-bearing component has a variable pressure coverage area, it is possible to test the ultimate pressure state of concrete samples of different sizes.

[0023] The present invention provides a pressure testing device for concrete in construction projects. Since the baffle is connected to the lifting mechanism through the traction mechanism, when the lifting mechanism drives the pressure-bearing component to move downward, the baffle will move upward in the opposite direction through the traction mechanism. When fragments are ejected, they will be blocked by the baffle, thereby avoiding the fragments from flying everywhere and making them inconvenient to clean. Attached Figure Description

[0024] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of a pressure testing device for concrete in construction projects according to the present invention;

[0026] Figure 2 This is a schematic diagram of the lifting mechanism mounted on a frame of a concrete pressure testing device for construction projects according to this utility model.

[0027] Figure 3 This utility model relates to a pressure testing device for concrete in construction projects. Figure 1 Figure 2 A further enlarged structural diagram of the lifting mechanism shown in the image;

[0028] Figure 4 This is a further enlarged structural schematic diagram of the pressure-bearing component of a pressure testing device for concrete in construction engineering, according to this utility model.

[0029] Figure 5 This utility model relates to a pressure testing device for concrete in construction projects. Figure 4 A further enlarged and exploded structural diagram showing the central propulsion unit and pressure unit;

[0030] Figure 6 This is a further enlarged structural schematic diagram of the traction mechanism of a pressure testing device for concrete in construction projects according to this utility model.

[0031] In the diagram: 1. Base; 2. Frame; 21. Base plate; 22. Support column; 23. Top plate; 24. Storage platform; 3. Lifting mechanism; 31. Gearbox; 32. Motor; 33. Lead screw; 34. Guide rod; 4. Pressure-bearing component; 41. Pushing part; 411. Connecting rod; 412. Connecting body; 42. Pressing part; 421. Pressure block; 422. Pressure sensor; 43. Sliding component; 431. Slide rail; 44. Screw; 45. Screw sleeve; 46. Collar; 5. Baffle; 6. Traction mechanism; 61. Bracket; 62. Fixed pulley; 63. Rope. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] like Figure 1As shown, this type of concrete pressure testing device for construction projects includes a base 1, a frame 2 on the base 1, a lifting mechanism 3 on the frame 2, and a pressure-bearing component 4 at the bottom end of the lifting mechanism 3. The lifting mechanism 3 is used to drive the pressure-bearing component 4 to move vertically and press down on the concrete sample placed on the frame 2 to test the ultimate compressive strength of the concrete sample. Therefore, it can verify whether the concrete has reached the load-bearing requirements.

[0037] A shield 5 is fitted over the outside of the base 1. Two traction mechanisms 6 (including but not limited to) are connected between the shield 5 and the top of the lifting mechanism 3, facing each other left and right. The traction mechanism 6 is used to drive the shield 5 to move upward by means of the downward movement of the lifting mechanism 3. Therefore, when the pressure component 4 presses down on the concrete sample, the shield 5 will automatically move upward to surround the frame 2. Thus, when the concrete sample is subjected to extreme pressure and fragments are ejected, the flying fragments will be blocked by the shield 5, preventing the flying fragments from accidentally injuring the test personnel. The shield 5 is preferably made of transparent material, such as stainless steel glass. Therefore, when the shield 5 surrounds the frame 2, the pressure condition of the concrete sample on the frame 2 can be observed through the shield 5.

[0038] like Figure 2 As shown, the frame 2 includes a base plate 21 fixed to the bottom of the base 1, four pillars 22 fixed to the base plate 21, and a top plate 23 fixed between the tops of the four pillars 22. A platform 24 for placing concrete samples is fixed in the middle of the base plate 21, and the lifting mechanism 3 is fixed to the top plate 23. Since the lifting mechanism 3 has a transmission component, the transmission component will pass through the top plate 23 and connect to the pressure-bearing component 4, so that the transmission component can drive the pressure-bearing component 4 to move closer to or away from the platform 24, and apply pressure to the concrete sample on the platform 24.

[0039] like Figure 3 As shown, and with reference Figure 1 and Figure 2 The lifting mechanism 3 includes a reduction gearbox 31 fixed on the top plate 23, a motor 32 connected to the reduction gearbox 31, a lead screw 33 (i.e., a transmission assembly) that passes through the reduction gearbox 31 and the top plate 23, and two guide rods 34 connected to the bottom of the lead screw 33 and extending upward through the top plate 23.

[0040] It should be noted that: the gearbox 31 includes a worm gear assembly, the worm gear shaft is vertically rotatable, and a ball nut is interference-fitted on the worm gear shaft. The lead screw 33 is connected to the ball nut at one end, which passes through the gearbox 31 and the top plate 23. The worm and worm gear mesh and are coaxially connected with the motor 32, so the motor 32 can drive the worm gear to rotate in the gearbox 31 through the worm gear. The worm gear then drives the lead screw 33 to rotate through the ball nut. Since the lead screw 33 needs to move vertically, the two guide rods 34 restrict the lead screw 33 from rotating with the ball nut. Instead, the rotation of the ball nut drives the lead screw 33 to move vertically. Since the pressure-bearing component 4 is connected to the bottom of the lead screw 33, it can move the pressure-bearing component 4 closer to or away from the platform 24.

[0041] like Figure 4 As shown, the pressure-bearing component 4 located at the bottom end of the lead screw 33 includes a transmission part, a pushing part 41, a pressure-applying part 42, and a sliding component 43. The pushing part 41 is connected between the transmission part and the sliding component 43. The pressure-applying part 42 is disposed on the sliding component 43 and connected to the pushing part 41. The transmission part is used to change the position of the pushing part 41 on the sliding component 43 through the pushing part 41, so as to change the pressure-applying coverage area formed by the pressure-applying part 42, thereby enabling the ultimate pressure state to be tested on concrete samples of different sizes.

[0042] Furthermore, the transmission unit includes a screw 44 fixed to the bottom of the lead screw 33, a screw sleeve 45 threadedly connected to the screw 44, and a collar 46 sleeved on the screw sleeve 45. Under the threaded engagement, the screw sleeve 45 can rotate on the screw 44 by rotating it, so that the height of the screw sleeve 45 on the screw 44 changes. For example, the height of the screw sleeve 45 on the screw 44 decreases, so that the collar 46 located outside the screw sleeve 45 also decreases in height. At this time, the collar 46 will drive the pressure application part 42 to move on the sliding assembly 43 through the pushing part 41, that is, the straight distance between the pressure application part 42 and the screw 44 will increase, so that the coverage area formed by the pressure application part 42 on the sliding assembly 43 will be further increased, so that pressure tests can be performed on larger concrete samples. Conversely, when the straight distance between the pressure application part 42 and the screw 44 decreases, the coverage area decreases, so that pressure tests can be performed on smaller concrete samples.

[0043] Furthermore, such as Figure 5 As shown, and for reference Figure 4The pushing part 41 includes at least three circumferentially equidistant connecting rods 411 hinged to the collar 46, and a connecting body 412 hinged to the connecting rods 411. The connecting body 412 is used to slide on the sliding assembly 43. The sliding assembly 43 includes at least three circumferentially equidistant slide rails 431 fixed to the bottom of the screw 44, and a plurality of fixing rods fixed between the slide rails 431. The pressing part 42 includes at least three pressure blocks 421 located at the bottom of the slide rails 431 and fixed to the connecting body 412, and a pressure sensor 422 embedded in the bottom of the pressure block 421.

[0044] When the collar 46 descends, it causes the connecting rod 411 to rotate at both ends of the collar 46 and the connecting body 412, causing the connecting rod 411 to gradually tilt from a near-vertical state. That is, the height of the top of the connecting rod 411 decreases, and the bottom of the connecting body 412 drives the connecting body 412 to slide away from the screw 44 on the slide rail 431. Since the connecting body 412 is connected to the pressure block 421, it drives the position of the pressure block 421 on the slide rail 431 to change. It also combines with the pressure block 421 on each slide rail 431 to form a larger pressure coverage area. Conversely, it reduces the pressure coverage area. The pressure sensor 422 embedded in the pressure block 421 can be used to know the pressure value of the concrete sample in real time.

[0045] It should be noted that the pressure block 421 has a groove recessed from the bottom towards the inside (not shown in the figure). The pressure sensor 422 is fixed in the groove, and the bottom of the pressure sensor 422 is flush with the groove opening. That is, when the pressure block 421 contacts the concrete sample, the probe of the pressure sensor 422 will also contact it. In addition, a wiring groove (not shown in the figure) is also provided on the pressure block 421. The wiring groove is used to allow the wires of the pressure sensor 422 to pass through the instrument that displays the pressure value, so that the signal can be transmitted to the instrument through the wires.

[0046] like Figure 6 As shown, and for reference Figure 1 - Figure 3 At least two traction mechanisms 6 each include a bracket 61 fixed on the top plate 23, at least one fixed pulley 62 fixed on the bracket 61, and a rope 63 with one end fixed to the top of the lead screw 33 and the other end fixed to the guard 5 via the fixed pulley 62.

[0047] The rope 63 has a first end and a second end away from the first end. The first end is connected to the top of the screw 33, and the second end is connected to the baffle 5 via the fixed pulley 62. Therefore, when the first end is driven by the screw 33, it will move downward, while the second end will drive the baffle 5 upward under the action of the fixed pulley 62 changing direction. As the screw 33 descends, it applies pressure to the concrete sample through the pressure-bearing component 4. At the same time, the upward movement of the baffle 5 will surround the frame 2. When fragments are ejected, they will be blocked by the baffle 5, thereby preventing fragments from flying everywhere and making it difficult to clean.

[0048] In some embodiments, the traction mechanism 6 is a component consisting of two racks and a gear. The two racks mesh synchronously with the gear. When one rack moves, it drives the other rack to move in the opposite direction through the gear. Therefore, when the pressure component 4 moves downward, the baffle 5 moves in the opposite direction and surrounds the frame 2.

[0049] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pressure testing device for construction engineering concrete, comprising a base (1), a frame (2) is arranged on the base (1), a lifting mechanism (3) is arranged on the frame (2), characterized in that, Also comprising: a pressure receiving assembly (4) arranged on the lifting mechanism (3) and having a variable pressure receiving area, the lifting mechanism (3) being configured to drive the pressure receiving assembly (4) to move vertically; a cover (5) arranged on the base (1) and used to surround part of the frame (2); and at least two traction mechanisms (6) arranged between the lifting mechanism (3) and the cover (5), the traction mechanisms (6) being used to drive the cover (5) to move reversely relative to the pressure receiving assembly (4) through the lifting mechanism (3).

2. A compression testing apparatus for construction engineering concrete according to claim 1, wherein The frame (2) comprises a bottom plate (21) fixed on the bottom of the base (1), four support columns (22) fixed on the bottom plate (21), and a top plate (23) fixed between the top portions of the four support columns (22), and a sample placing table (24) is fixed on the middle portion of the bottom plate (21) and used to place a concrete sample.

3. The pressure testing device for construction concrete according to claim 1, characterized by The lifting mechanism (3) comprises a speed reducer (31) fixed on the top plate (23), a motor (32) in transmission connection with the speed reducer (31), a lead screw (33) penetrating through the speed reducer (31) and the top plate (23), and two guide rods (34) connected to the bottom of the lead screw (33) and extending upward and out of the top plate (23). The pressure receiving assembly (4) is also connected to the bottom of the lead screw (33), and the lead screw (33) is used to drive the pressure receiving assembly (4) to move close to or away from the sample placing table (24) through the speed reducer (31) and the guide rods (34).

4. The pressure testing apparatus for construction engineering concrete according to claim 3, characterized in that, The pressure receiving assembly (4) comprises a transmission portion, a pushing portion (41), a pressure applying portion (42), and a sliding assembly (43), the pushing portion (41) is connected between the transmission portion and the sliding assembly (43), the pressure applying portion (42) is arranged on the sliding assembly (43) and connected with the pushing portion (41), and the transmission portion is used to change the position of the pushing portion (41) on the sliding assembly (43) through the pushing portion (41) to change the pressure receiving area formed by the pressure applying portion (42).

5. The pressure testing apparatus for construction concrete according to claim 4, wherein The transmission portion comprises a screw rod (44) fixed on the bottom of the lead screw (33), a screw sleeve (45) in threaded connection with the screw rod (44), and a sleeve ring (46) sleeved on the screw sleeve (45); The pushing portion (41) comprises at least three connecting rods (411) circumferentially and equidistantly hinged on the sleeve ring (46), and a connecting body (412) hinged on the connecting rods (411), and the connecting body (412) is used to slide on the sliding assembly (43); The sliding assembly (43) comprises at least three sliding rails (431) circumferentially and equidistantly fixed on the bottom of the screw rod (44), and a plurality of fixed rods fixed between the sliding rails (431); The pressure applying portion (42) comprises at least three pressure blocks (421) located on the bottom of the sliding rails (431) and fixed with the connecting body (412), and a pressure sensor (422) embedded on the bottom of the pressure blocks (421).

6. The pressure testing apparatus for construction engineering concrete according to claim 3, characterized by At least two of the traction mechanisms (6) each include a support (61) fixed on the top plate (23), at least one fixed pulley (62) on the support (61), and a rope body (63) fixed at one end to the top of the lead screw (33) and at the other end to the baffle cover (5) via the fixed pulley (62).

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