Concrete strength detection device for road construction

Abstract

The application provides a concrete strength detection device for road construction, which comprises a pressure test mechanism, the pressure test mechanism has a base, a pressure bearing support is fixedly arranged on the top of the base, a square guard fence is centrally arranged above the pressure bearing support, a lifting mechanism is symmetrically arranged above the guard fence, the lifting mechanism is fixedly arranged above the guard fence, the lifting mechanism drives the guard fence to move up and down, and a centering mechanism corresponding to the side surface of a test block is arranged in the guard fence; in the application, the square guard fence can form a continuous barrier around the test block, the broken concrete can be prevented from splashing around in the test process, and the test protection effect is improved; the automatic centering of the test block, the anti-splashing in the test process and the lifting of the guard fence can be realized by only controlling the position of the lifting mechanism.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of detection equipment, and particularly relates to a concrete strength detection device for road construction. BACKGROUND

[0002] As a main building material, the strength of concrete directly affects the durability and safety of roads. If the strength is insufficient, it may lead to cracking and deformation of the road surface, even structural failure, and cause safety hazards.

[0003] The test block method is a basic method for detecting the strength of concrete in road construction. The strength of concrete is directly reflected by the compression test of standard cubic test blocks (such as 150mmx150mmx150mm). At least one group of test blocks (3 blocks per group) are required for every 100m3 of poured concrete for strength evaluation after 28 days of standard curing, which is the core basis for quality acceptance.

[0004] In the prior art, the Chinese utility model patent document with the authorization announcement number CN210243374U discloses a pressure testing machine convenient for collecting chips, wherein a lower pressing plate is arranged on the pressure bearing table, a cleaning device for cleaning the test block residues on the lower pressing plate is arranged on the lower pressing plate, a movable cover door is further arranged on one side of the lower pressing plate, a lifting mechanism for lifting the movable cover door is further arranged on the base, a protective cover for shielding the splashed fragments generated when the test block breaks is used when the movable cover door is lifted, and the test block waste pushed out from the lower pressing plate by the cleaning device enters the waste barrel when the cover door falls. In the above prior art, the movable cover door can only protect one side of the test block, and the protection effect is limited. In addition, the test block needs to be manually positioned when placed on the top of the lower pressing plate to avoid the offset of the test block affecting the test results. Manual positioning not only consumes time, but also the positioning accuracy is greatly affected by human factors.

[0005] In some prior art, mechanisms for positioning test blocks are disclosed, such as the concrete strength detection equipment disclosed in the Chinese invention patent document with the authorization announcement number CN119246217B, which specifically discloses a calibration assembly for test block positioning. The calibration assembly needs to occupy the space on the top of the pressure bearing table, which is not convenient for cleaning the top of the pressure bearing table after the test is completed.

[0006] Therefore, it is necessary to design a concrete strength detection device for road construction which can improve the test protection effect and automatically center the test block for centering positioning to solve the technical problems currently faced. SUMMARY

[0007] In view of the deficiencies in the prior art, the application provides a concrete strength detection device for road construction which can improve the test protection effect and automatically center the test block for centering positioning.

[0008] The technical scheme of the present application is: a concrete strength detection device for road construction, comprising a pressure test mechanism, the pressure test mechanism has a base, the top of the base is fixedly provided with a pressure bearing support, the upper side of the pressure bearing support is provided with a pressure plate corresponding to the middle part thereof, the upper side of the pressure plate is provided with a lower pressing driving cylinder driving the upper and lower movement thereof;

[0009] The upper side of the pressure bearing support is centrally provided with a square protection fence, the upper side of the protection fence is symmetrically provided with a lifting mechanism, the lifting mechanism is fixedly arranged on the upper side of the protection fence, the lifting mechanism drives the upper and lower movement of the protection fence, the inside of the protection fence is provided with a centering mechanism corresponding to the side of the test block.

[0010] Further, the upper side of the protection fence is provided with a lifting frame corresponding thereto, the lifting mechanism drives the upper and lower movement of the lifting frame, the protection fence is slidingly connected below the lifting frame in the vertical direction; the centering mechanism has a centering push rod corresponding to the side of the test block, both ends of the centering push rod are hingedly connected with upper and lower connecting rods, the end of the lower connecting rod away from the centering push rod is hingedly connected with the inside bottom of the protection fence, the end of the upper connecting rod away from the centering push rod is hingedly connected with the inside of the lifting frame.

[0011] Further, the top end outside of the protection fence is uniformly provided with a reset sliding seat, a sliding rod is slidingly arranged in the vertical direction inside the reset sliding seat, the upper end of the sliding rod is fixedly connected with the bottom of the lifting frame, the lower end of the sliding rod is fixedly provided with a limiting plate, a reset spring is sleeved outside the sliding rod between the reset sliding seat and the lifting frame.

[0012] Further, the lifting mechanism has parallel upper and lower support plates, two lifting guide rods are symmetrically arranged between the upper and lower support plates, a lifting support is slidingly arranged on the lifting guide rod, a lifting lead screw is threadedly connected to the middle part of the lifting support, both ends of the lifting lead screw are rotatably connected with the upper and lower support plates, respectively, and the upper support plate is provided with a lifting driving motor driving the rotation of the lifting lead screw; the lifting support is fixedly arranged on the upper side of the protection fence through a fence support.

[0013] Further, the top of the pressure bearing support is slidingly provided with a pressure bearing platform, a translation mechanism driving the reciprocating movement of the pressure bearing platform is fixedly arranged on one side of the base, and the translation mechanism is hingedly connected with one side of the pressure bearing platform.

[0014] Further, one end of the pressure bearing support away from the translation mechanism is fixedly provided with a table plate support, an included angle alpha between the table plate support and the top surface of the pressure bearing support is obtuse, the table plate support and the pressure bearing support are smoothly transitioned through a circular arc transition plate, and both ends of the table plate support and the pressure bearing support are fixedly provided with side plates.

[0015] Further, the upper portion of the table plate support is provided with a cleaning mechanism, the cleaning mechanism has a sweeping roller corresponding to the pressure bearing table plate, both ends of the sweeping roller are rotatably provided with a sweeping roller shaft seat, the sweeping roller shaft seat is provided with a sweeping roller driving motor for driving the sweeping roller to rotate, and the side plates are provided with a lifting driving cylinder for driving the sweeping roller to move up and down.

[0016] Further, a dust collecting cover corresponding to the sweeping roller is fixedly arranged on one side of the sweeping roller shaft seat away from the protective fence, one side of the dust collecting cover close to the sweeping roller and the bottom of the dust collecting cover are open, and the dust collecting cover is provided with a dust suction pipe in communication therewith.

[0017] Further, the translation mechanism has a bracket fixedly arranged above one side of the base, the bracket is centrally provided with a translation driving cylinder, and the end of the translation driving cylinder is hingedly connected with the pressure bearing table plate.

[0018] Further, two translation guide rods parallel to the axis of the translation driving cylinder are symmetrically arranged on the bracket, the end of the translation guide rod is hingedly connected with the pressure bearing table plate, and a translation sliding seat is slidably arranged on the outer side of the translation guide rod, and the translation sliding seat is fixedly arranged on the top of the bracket.

[0019] The present application has the following beneficial effects:

[0020] (1) In the present application, the protective fence in the form of a square can form a continuous barrier around the test block, and can avoid the broken concrete from splashing around during the test, thereby improving the test protection effect.

[0021] (2) When the lifting mechanism is in the first position, the protective fence is located at the highest position, and the gap between the protective fence and the pressure bearing support can place the test block on the top of the pressure bearing support. After the test block is placed on the top of the pressure bearing support, the lifting mechanism drives the protective fence to move downward to the second position, and surrounds the outside of the test block. The lifting mechanism continues to move downward to the third position, and in the process of moving downward to the third position, the centering mechanism around the protective fence moves synchronously to the axis direction of the pressing plate, and pushes the test block to be centered and positioned above the pressure bearing support and corresponding to the pressing plate.

[0022] (3) The position control of the lifting mechanism can realize the automatic centering of the test block, the anti-splashing during the test, and the lifting of the protective fence.

[0023] (4) The centering mechanism is arranged inside the protective fence, and is driven to rise and fall with the protective fence through the lifting mechanism, and when the lifting mechanism is in the first position, the centering mechanism and the protective fence have a certain distance from the pressure bearing platform, and do not affect the cleaning of the top of the pressure bearing platform after the test is completed. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is one of structural schematic views of the concrete strength detection device for road construction in the application.

[0025] Figure 2 It is the second structural schematic view of the concrete strength detection device for road construction in the application.

[0026] Figure 3 It is the third structural schematic view of the concrete strength detection device for road construction in the application.

[0027] Figure 4 It is the structural schematic view of the lifting mechanism and the centering mechanism in the application.

[0028] Figure 5 It is the structural schematic view of the cleaning mechanism and the pressure bearing platform in the application.

[0029] Figure 6 It is the structural schematic view of the pressure bearing platform in the application. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative in nature and is in no way intended to limit the application, its application, or its uses, to such embodiments. The application can be implemented in numerous ways, including but not limited to those set forth in the following description below. Such embodiments of the application will be described in sufficient detail to enable those skilled in the art to make and use the application, and the embodiments set forth herein with reference to the Figures are illustrative only, and not intended to be limiting, unless otherwise specified. The description set forth herein of exemplary embodiments of the application includes various alternative steps and / or processes in the improvement of an existing technology. The description as set forth herein includes various alternative steps and / or processes in the improvement of an existing technology.

[0031] The terms "first", "second", and similar terms in the present application do not denote any order, number, or importance, but are only used to distinguish different parts. The terms "include" or "contain" and the like mean that the elements before the terms encompass the elements listed after the terms, and do not exclude the possibility of also encompassing other elements. "Up", "down", "left", "right", and the like are only used to indicate relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] As Figures 1 to 6The concrete strength detection device for road construction shown comprises a pressure test mechanism 1, the pressure test mechanism 1 has a base 11, the top of the base 11 is fixedly provided with a pressure bearing support 15, the upper portion of the pressure bearing support 15 is provided with a pressure applying plate 16 corresponding to the middle portion, the upper portion of the pressure applying plate 16 is provided with a pressure applying driving cylinder 13 driving the pressure applying plate 16 to move up and down, the pressure bearing support 15 is fixedly supported on the upper portion of the base 11 through a pressure bearing column 17, and a top frame 12 is fixedly supported on the upper portion of the base 11 through a stand column 14; a square protection fence 2 is centrally arranged on the upper portion of the pressure bearing support 15, symmetrical lifting mechanisms 3 are arranged on the upper portion of the protection fence 2, the lifting mechanisms 3 are fixedly arranged on the upper portion of the protection fence 2, the lifting mechanisms 3 drive the protection fence 2 to move up and down, and the protection fence 2 is internally provided with centering mechanisms 4 corresponding to the side surfaces of a test block.

[0033] In the above embodiment, the square protection fence 2 can form a continuous barrier around the test block, and can avoid the broken concrete from splashing around during the test, thereby improving the test protection effect; when the lifting mechanisms 3 are in the first position, the protection fence 2 is located at the highest position, and the gap between the protection fence 2 and the pressure bearing support 15 can be used to place the test block on the top of the pressure bearing support 15; when the test block is placed on the top of the pressure bearing support 15, the lifting mechanisms 3 drive the protection fence 2 to move downward to the second position, and surround the outside of the test block; the lifting mechanisms 3 continue to move downward to the third position, and in the process of moving downward to the third position, the centering mechanisms 4 around the protection fence 2 move synchronously to the axial direction of the pressure applying plate 16, thereby pushing the test block to be centered above the pressure bearing support 15 and corresponding to the pressure applying plate 16, and the test block is automatically centered and positioned; after the test block is centered, the lifting mechanisms 3 move to the second position again, the centering mechanisms 4 are away from the test block, and the test can be started; the test block is automatically centered, the splashing during the test is prevented, and the protection fence 2 is lifted only by controlling the position of the lifting mechanisms 3; the centering mechanisms 4 are arranged in the interior of the protection fence 2, and are driven to move up and down with the protection fence 2 by the lifting mechanisms 3; when the lifting mechanisms 3 are in the first position, the centering mechanisms 4 and the protection fence 2 have a certain distance from the pressure bearing support 15, and the top of the pressure bearing support 15 can be cleaned after the test; specifically, the protection fence 2 is a square cylindrical structure.

[0034] As a specific embodiment of the centering mechanisms 4 in the above embodiment, as shown in Figure 4As shown, the upper part of the protective fence 2 is provided with a lifting frame 8 corresponding thereto, the lifting mechanism 3 drives the lifting frame 8 to move up and down, and the protective fence 2 is connected to the lower part of the lifting frame 8 in a sliding manner in the vertical direction; the centering mechanism 4 has a centering push rod 41 corresponding to the side of the test block, both ends of the centering push rod 41 are hingedly connected with an upper connecting rod 42 and a lower connecting rod 43, one end of the lower connecting rod 43 away from the centering push rod 41 is hingedly connected with the inner bottom of the protective fence 2, and one end of the upper connecting rod 42 away from the centering push rod 41 is hingedly connected with the inner side of the lifting frame 8; when the lifting mechanism 3 is in the second position, the protective fence 2 is in contact with the top of the pressure support 15, and when the lifting mechanism 3 moves downward to the third position, the lifting frame 8 is driven to move downward, the upper end of the upper connecting rod 42 is driven to move downward, the upper connecting rod 42 cooperates with the lower connecting rod 43 to drive the centering push rod 41 to move to the axis direction of the pressing plate 16, and the four centering push rods 41 around the test block move synchronously, the centering push rod 41 drives the middle and lower parts of the test block to move to complete the centering, and the lifting mechanism 3 just moves to the third position after the centering is completed; after the centering is completed, the lifting mechanism 3 moves upward to the second position, the lifting frame 8 and the upper end of the upper connecting rod 42 are driven to move upward, and the centering push rod 41 is away from the test block to avoid affecting the test block during the test.

[0035] In some embodiments, the top end of the protective fence 2 is uniformly provided with a reset sliding seat 46, a sliding rod 44 is slidably arranged in the vertical direction in the inner part of the reset sliding seat 46, the upper end of the sliding rod 44 is fixedly connected with the bottom of the lifting frame 8, the lower end of the sliding rod 44 is fixedly provided with a limiting plate 47, and the outer side of the sliding rod 44 between the reset sliding seat 46 and the lifting frame 8 is sleeved with a reset spring 45; when the lifting mechanism 3 is in the first position, the limiting plate 47 supports the bottom of the reset sliding seat 46, the protective fence 2 is lifted upward, and there is enough gap between the protective fence 2 and the pressure support 15 to place the test block; when the lifting mechanism 3 is in the second position, the reset spring 45 is just compressed by 0.5-2 cm, and the bottom of the protective fence 2 is tightly attached to the top of the pressure support 15 through the elastic force of the reset spring 45; when the lifting mechanism 3 moves from the second position to the third position, the reset spring 45 is continuously compressed, and the reset spring 45 is gradually released when the lifting mechanism 3 moves from the third position to the second position; the reset sliding seat 46 continuously receives the downward elastic force when the lifting mechanism 3 is in the second position and the third position, so that the protective fence 2 is tightly attached to the top of the pressure support 15.

[0036] As one of the specific embodiments of the lifting mechanism 3 in the above embodiment, the lifting mechanism 3 has a parallel upper support plate 32 and a lower support plate 33, two lifting guide rods 36 are symmetrically arranged between the upper support plate 32 and the lower support plate 33, a lifting support 31 is slidably arranged on the lifting guide rod 36, a lifting lead screw 35 is threadedly connected to the middle part of the lifting support 31, the two ends of the lifting lead screw 35 are rotatably connected to the upper support plate 32 and the lower support plate 33 respectively, and the upper support plate 32 is provided with a lifting drive motor 34 for driving the lifting lead screw 35 to rotate; the lifting support 31 is fixedly arranged above the protective fence 2 through the enclosing support 21; in the lifting mechanism 3, the lifting drive motor 34 drives the lifting lead screw 35 to rotate, the thread structure between the lifting lead screw 35 and the lifting support 31 drives the lifting lead screw 35 to move up and down, the lifting lead screw 35 drives the lower support plate 33 to move up and down, the lower support plate 33 is fixedly connected with the lifting frame 8, so as to drive the lifting frame 8 to move up and down; the first position, the second position and the third position of the lifting mechanism 3 mentioned in the above embodiment refer to the height position of the lower support plate 33 in the lifting mechanism 3; specifically, the bottom end of the enclosing support 21 is fixed on the profile support at the top of the base 11.

[0037] In some embodiments, in order to enable the device to automatically dump the test block residue generated after the test, as shown in Figure 1 and 2 , a pressure bearing platform 5 is slidably arranged on the top of the pressure bearing platform 15, a translation mechanism 6 for driving the pressure bearing platform 5 to reciprocate is fixedly arranged on one side of the base 11, and the translation mechanism 6 is hingedly connected to one side of the pressure bearing platform 5; during the test, the test block is not directly placed on the top of the pressure bearing platform 15, but on the top of the pressure bearing platform 5 on the pressure bearing platform 15; after one test is completed, the translation mechanism 6 drives the pressure bearing platform 5 to slide on the top of the pressure bearing platform 15, when the pressure bearing platform 5 slides to extend outward from the edge of the pressure bearing platform 15, due to the hinged connection between the translation mechanism 6 and the pressure bearing platform 5, the pressure bearing platform 5 is turned downward, so that the test block residue in the pressure bearing platform 5 slides out, realizing automatic cleaning of the test block residue; after the test block slides out, the translation mechanism 6 drives the pressure bearing platform 5 to reset, so that the next test can be started.

[0038] As one of the specific embodiments of the pressure bearing platform 5, the top of the pressure bearing platform 5 is open on the side away from the translation mechanism 6, and the other three sides are all vertically fixedly provided with a blocking edge 51, which can prevent the test block residue from sliding off, and the opening can facilitate the test block residue to be poured out.

[0039] In some embodiments, a high-rigidity chromium-molybdenum steel pad with a thickness not less than 20 mm is arranged at the bottom of the pressure bearing platform 5, so as to improve the elastic modulus of the pressure bearing platform 5, reduce the deformation amount and reduce the test error.

[0040] In some embodiments, as shown in Figure 6As shown, the end of the pressure support platform 15 away from the translation mechanism 6 is fixedly provided with a platform support 151, and the included angle α between the platform support 151 and the top surface of the pressure support platform 15 is obtuse. The platform support 151 and the pressure support platform 15 are smoothly transitioned through a circular arc transition plate 152. The circular arc transition plate 152, the platform support 151 and the pressure support platform 15 are an integral structure. The two ends of the platform support 151 are fixedly provided with side plates 153 between the two ends of the platform support 151 and the pressure support platform 15. The side plates 153 play a supporting role between the two ends of the platform support 151 and the pressure support platform 15. The circular arc transition plate 152 plays a certain transition role when the pressure platform 5 is flipped down. The platform support 151 provides support after the pressure platform 5 is flipped. The pressure platform 5 stays for a period of time under the support of the platform support 151, and then the test block residue on the pressure platform 5 slides off. Specifically, the included angle α between the platform support 151 and the top surface of the pressure support platform 15 is 145°.

[0041] In some embodiments, after the test block residue on the pressure platform 5 slides off, some dust, concrete debris and other particulate matter are easily left on the top of the pressure platform 5, which causes stress concentration during the test and affects the accuracy of the test. Therefore, as shown in Figure 3 and 5 The top of the platform support 151 is provided with a cleaning mechanism 7. The cleaning mechanism 7 has a sweeping roller 71 corresponding to the pressure platform 5. The two ends of the sweeping roller 71 are rotatably provided with sweeping roller shaft seats 72. The sweeping roller shaft seats 72 are provided with a sweeping roller driving motor 73 for driving the sweeping roller 71 to rotate. The side plates 153 are provided with a lifting driving cylinder 74 for driving the sweeping roller 71 to move up and down. After the test block residue on the pressure platform 5 slides off, the sweeping roller driving motor 73 drives the sweeping roller 71 to rotate, and the lifting driving cylinder 74 drives the sweeping roller 71 to move down to contact the top of the pressure platform 5. As the translation mechanism 6 drives the pressure platform 5 to reset, the pressure platform 5 moves relative to the sweeping roller 71, thereby cleaning the pressure platform 5 and sweeping away the dust, concrete debris and other particulate matter on the top of the pressure platform 5, so as to avoid affecting the accuracy of the test.

[0042] In some embodiments, the sweeping roller shaft seats 72 are fixedly provided with a dust collection cover 75 corresponding to the sweeping roller 71 on the side away from the protective fence 2. The dust collection cover 75 is open on the side close to the sweeping roller 71 and the bottom. The dust collection cover 75 is provided with a dust suction pipe 76 in communication therewith. When the device is in use, an external dust suction device is connected to the dust suction pipe 76. During the cleaning process of the pressure platform 5 by the sweeping roller 71, the dust suction device operates synchronously to adsorb the dust, concrete debris and other particulate matter swept out, thereby avoiding secondary pollution of the pressure platform 5.

[0043] In some embodiments, as shown in Figure 2As shown, the translation mechanism 6 has a bracket 64 fixedly arranged above one side of the base 11, the bracket 64 is centrally provided with a translation driving cylinder 61, the end of the translation driving cylinder 61 is hinged with the end of the pressure table 5; the end of the bracket 64 is supported on the top of the base 11 by a profile, the bracket 64 supports the translation driving cylinder 61, by controlling the extension and contraction of the translation driving cylinder 61, the pressure table 5 can be driven to reciprocate.

[0044] In some embodiments, two translation guide rods 62 parallel to the axis of the translation driving cylinder 61 are symmetrically arranged on the bracket 64, the end of the translation guide rod 62 is hinged with the end of the pressure table 5, the outer side of the translation guide rod 62 is slidingly provided with a translation sliding seat 63, the translation sliding seat 63 is fixedly arranged on the top of the bracket 64; by hinging the translation guide rod 62 slidingly arranged on the top of the bracket 64 with the pressure table 5, the stability of the reciprocating movement of the pressure table 5 is improved.

[0045] So far, the embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0046] The above-described embodiments only express some implementation manners of the present application, which are described in a more specific and detailed manner, but can not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A concrete strength testing device for road construction, characterized by: The pressure testing mechanism comprises a base, a pressure support is fixedly provided on the top of the base, a pressure plate corresponding to the middle part of the pressure support is provided above the pressure support, and a downward pressure driving cylinder for driving the pressure plate to move up and down is provided above the pressure plate; A regular quadrilateral protective enclosure is centrally provided above the pressure support, and a lifting mechanism is symmetrically provided above the protective enclosure. The lifting mechanism is fixedly mounted above the protective enclosure and drives the protective enclosure to move up and down. A centering mechanism corresponding to the side faces of the test block is provided inside the protective enclosure; A corresponding lifting frame is provided above the protective enclosure, the lifting mechanism drives the lifting frame to move up and down, and the protective enclosure is slidably connected to the bottom of the lifting frame in the vertical direction; The centering mechanism has a centering push rod corresponding to the side of the test block, and both ends of the centering push rod are hinged with an upper connecting rod and a lower connecting rod, an end of the lower connecting rod facing away from the centering push rod is hinged to the inner bottom of the protective enclosure, and an end of the upper connecting rod facing away from the centering push rod is hinged to the inner side of the lifting frame; The lifting mechanism comprises an upper support plate and a lower support plate which are parallel to each other, two lifting guide rods are symmetrically arranged between the upper support plate and the lower support plate, a lifting support is slidably arranged on the lifting guide rods, a lifting screw is threadedly connected to the middle part of the lifting support, and the two ends of the lifting screw are rotatably connected to the upper support plate and the lower support plate respectively, and a lifting drive motor for driving the lifting screw to rotate is arranged on the upper support plate; The lifting support is fixedly mounted above the protective enclosure through an enclosure bracket; When the lifting mechanism is in the first position, there is a certain distance between the centering mechanism and the protective enclosure and the pressure support platform, which does not affect the cleaning of the top of the pressure support platform after the test; When the lifting mechanism is in the second position, the protective enclosure contacts the top of the pressure support. When the lifting mechanism moves down to the third position, it drives the lifting frame to move down. The downward movement of the lifting frame drives the upper end of the upper connecting rod to move down. The upper connecting rod cooperates with the lower connecting rod to push the centering push rod to move toward the axis of the pressure plate. The four centering push rods around the test block move synchronously. The centering push rods push the middle and lower part of the test block to complete the centering. After the centering is completed, the lifting mechanism moves upward to the second position, driving the lifting frame and the upper end of the upper connecting rod to move upward.

2. The concrete strength detection device for road construction according to claim 1, characterized in that: Reset slides are evenly arranged on the outer side of the top of the protective enclosure, and a sliding rod is arranged inside the reset slide for sliding in the vertical direction. The upper end of the sliding rod is fixedly connected to the bottom of the lifting frame, and a limiting plate is fixedly provided at the lower end of the sliding rod. A reset spring is mounted on the outer side of the sliding rod between the reset slide and the lifting frame.

3. The concrete strength detection device for road construction according to claim 1, characterized in that: A pressure plate is slidably provided on the top of the pressure support, and a translation mechanism for driving the pressure plate to move back and forth is fixedly mounted on one side of the base, and the translation mechanism is hinged to one side of the pressure plate.

4. The concrete strength detection device for road construction according to claim 3, characterized in that: A table bracket is fixedly provided on the end of the pressure-bearing support platform away from the translation mechanism, and the angle α between the table bracket and the top surface of the pressure-bearing support platform is an obtuse angle. The table bracket and the pressure-bearing support platform have a smooth transition through an arc transition plate, and side plates are fixedly provided between the two ends of the table bracket and the pressure-bearing support platform.

5. The concrete strength detection device for road construction according to claim 4, characterized in that: A cleaning mechanism is provided above the table bracket, and the cleaning mechanism has a sweeping roller corresponding to the pressure table, and sweeping roller shaft seats are rotatably provided at both ends of the sweeping roller. A sweeping roller driving motor for driving the sweeping roller to rotate is provided on the sweeping roller shaft seat, and a lifting driving cylinder for driving the sweeping roller to move up and down is provided on the side plate.

6. The concrete strength detection device for road construction according to claim 5, characterized in that: A dust collecting cover corresponding to the sweeping roller is fixedly mounted on the sweeping roller shaft seat on a side away from the protective enclosure. The side of the dust collecting cover close to the sweeping roller and the bottom thereof are open, and a dust suction pipe connected thereto is provided on the dust collecting cover.

7. The concrete strength detection device for road construction according to claim 3, characterized in that: The translation mechanism comprises a bracket fixedly mounted above one side of the base, a translation drive cylinder is centrally arranged on the bracket, and an end portion of the translation drive cylinder is hinged to the pressure plate.

8. The concrete strength detection device for road construction according to claim 7, characterized in that: Two translation guide rods parallel to the axis of the translation drive cylinder are symmetrically arranged on the bracket, the ends of the translation guide rods are hinged to the pressure platform, and a translation slide is slidingly arranged on the outer side of the translation guide rods, and the translation slide is fixedly arranged on the top of the bracket.

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