A concrete compressive strength testing device and testing method

Abstract

The present application relates to the field of concrete performance testing, and specifically discloses a concrete compressive strength testing device and testing method, wherein the testing device includes a penetrometer body, a stabilizing mechanism, and the stabilizing mechanism includes a fixed ring seat, a support plate and a stabilizing roller. The penetrometer body is detachably connected to the inner circumferential wall of the fixed ring seat through a mounting assembly; the end of the support plate with a smaller radius is connected to the end wall of the fixed ring seat; the axial end wall of the support plate away from the fixed seat is provided with a mounting groove, two stabilizing rollers form a group, and several groups of stabilizing rollers are rotatably connected to the groove wall of the mounting groove, the axes of the stabilizing rollers in the same group are parallel and opposite along the radial direction of the support plate, and a reverse linkage assembly is provided between the stabilizing rollers in the same group to cause the stabilizing rollers in the same group to rotate in the opposite direction; the stabilizing mechanism also includes an alarm assembly. The present application can not only reduce the deviation of the penetrometer during operation, but also give an alarm in time when the penetrometer deviates too much, thereby improving the accuracy of the test results.

Description

Technical Field

[0001] The present application relates to the field of concrete performance testing, and more specifically, to a concrete compressive strength testing device and a testing method. Background Art

[0002] The penetration method for testing masonry mortar is based on the correlation between the depth of penetration of the measuring nail into the mortar and the compressive strength of the mortar. A compressive working spring is used to load the measuring nail and penetrate it into the mortar. The penetration depth of the measuring nail is used to convert the compressive strength of the mortar into the strength curve.

[0003] The instruments used in the penetration method test include the penetration type mortar strength tester, referred to as the penetrometer. When using it, first insert the measuring nail into the measuring nail seat of the penetration rod with the tip of the measuring nail facing outward, then operate the penetrometer and hang the penetration hook. During the test, hold the penetrometer horizontally with one hand, let the flat head of the penetrometer contact the polished surface of the mortar joint, and pull the trigger with the other hand, the penetrometer releases energy freely, and the test is completed; remove the penetrometer and the measuring nail, and blow and suck the measuring hole with a hair dryer. Finally, use a depth gauge to measure the depth, read the display value of the measuring gauge directly from the dial, and record it in the record table. The mortar strength can be known by checking the strength curve.

[0004] However, when existing penetrometers measure concrete, especially high-strength concrete, the spring force is very large, so the operator must also apply sufficiently large force during operation. This process can easily cause the penetrometer body to shake and deflect, which in turn affects the accuracy of the test results. Summary of the invention

[0005] The present application provides a concrete compressive strength testing device and testing method, which can not only stabilize the penetrometer, but also give an alarm in time when the penetrometer deviates too much, thereby improving the accuracy of the test results.

[0006] In a first aspect, the present application provides a concrete compressive strength detection device, which adopts the following technical solution:

[0007] A concrete compressive strength detection device comprises a penetrometer body, and also comprises a stabilizing mechanism detachably connected to the penetrometer body through a mounting assembly, the stabilizing mechanism comprises a fixed ring seat, a support plate and a stabilizing roller, the penetrometer body is detachably connected to the inner peripheral wall of the fixed ring seat through the mounting assembly; the support plate is an annular plate and its radius gradually increases along the axial direction, the end of the support plate with a smaller radius is connected to the end wall of the fixed ring seat, and the support plate and the fixed ring seat share a central axis; the axial end wall of the support plate away from the fixed seat is provided with a mounting groove, two stabilizing rollers form a group, and several groups of stabilizing rollers are rotatably connected to the groove wall of the mounting groove, the axes of the stabilizing rollers in the same group are parallel and opposite to each other along the radial direction of the support plate, the circumferential wall of the stabilizing roller is flush with the end wall of the support plate along the axial direction of the fixed ring seat and away from the fixed ring seat, and a reverse linkage assembly is provided between the stabilizing rollers in the same group to cause the stabilizing rollers in the same group to rotate in the opposite direction; the stabilizing mechanism also comprises an alarm assembly, and the alarm assembly is used to detect the rotation of the stabilizing roller to judge the degree of deviation of the penetrometer body and to alarm.

[0008] Furthermore, the reverse linkage assembly includes a first linkage roller, a second linkage roller, a linkage tooth plate, a pull rod and a linkage ring, the fixed ring seat is provided with a housing ring cavity having a common central axis with the fixed ring seat, the support plate is provided with a plurality of housing oblique cavities extending along the inclined side walls of the support plate, the end of the housing ring cavity close to the support plate and the mounting groove are both in communication with the housing oblique cavity; the first linkage roller and the stabilizing roller are coaxially connected, the second linkage roller and the first linkage roller are arranged one by one and are rotatably connected to the cavity wall of the housing ring cavity close to the housing oblique cavity, and the first linkage roller and the corresponding second linkage roller are both connected There is a linkage belt, which passes through the inclined accommodating cavity; a linkage gear is arranged on the second linkage roller, and the linkage tooth plate and the linkage gear are arranged in a one-to-one correspondence, and the linkage tooth plate is radially slidingly arranged on the side wall of the accommodating ring cavity along the fixed ring seat, and the linkage gear is meshed with the linkage tooth plate, and the meshing directions of the two pairs of linkage gears and linkage tooth plates corresponding to the same group of stabilizing rollers are opposite; the linkage ring is axially slidingly arranged on the cavity wall of the fixed ring cavity along the fixed ring seat and has a common central axis with the fixed ring seat, one end of the pull rod is hinged on the outer peripheral wall of the linkage ring, and the two ends of the pull rod are hinged on the linkage tooth plate.

[0009] Furthermore, the stabilizing roller includes a base shaft rotatably connected to the wall of the mounting groove and a latching tooth arranged on the circumferential wall of the base shaft.

[0010] Furthermore, a plurality of guide base blocks are fixedly connected to the base shaft, a telescopic column is provided on the inner wall of the guide base block so as to slide radially along the base shaft, a pressure elastic member is provided between one end of the telescopic column extending into the guide base block and the inner wall of the guide base block, and the latch is provided at one end of the telescopic column extending out of the guide base block.

[0011] Furthermore, the alarm component includes a displacement sensor, a sensing block and an alarm. A clearance groove is provided through the circumferential wall of the linkage ring, and the clearance groove extends along the axial direction of the linkage ring. The sensing block is provided on the circumferential wall of the linkage ring and is located in the middle of the clearance groove. Displacement sensors are provided on the groove walls at both ends of the clearance groove along the axial direction of the linkage ring. The displacement sensor is opposite to the sensing block along the axial direction of the linkage ring, and the displacement sensor controls the operation of the alarm.

[0012] Furthermore, the mounting assembly includes an elastic rubber pad, a compacting block and a driving member, the elastic rubber pad is arranged on the inner circumferential wall of the fixed ring seat, the elastic rubber pad forms a closed ring and the inner circumferential wall is adapted to the shape of the circumferential wall of the mounting portion of the penetrometer body; a plurality of feed grooves are arranged on the inner side wall of the fixed ring seat, the notches of the feed grooves are opposite to the elastic rubber pad, the compacting block is arranged on the feed groove wall along the radial sliding direction of the fixed ring seat, and the driving member is arranged on the fixed ring seat and connected to the compacting block.

[0013] Furthermore, the driving member includes a driving push ring and a pushing block, an operating chamber communicated with the sliding groove is arranged in the fixed ring seat, the pushing block is arranged on the side of the compacting block away from the center of the fixed ring seat, the pushing block is located in the operating chamber, and the side wall of the pushing block radially away from the compacting block along the fixed ring seat is an inclined surface, the driven push ring is threadedly connected to the fixed ring seat and has a common center axis with the fixed ring seat, the end wall of the driving push ring extends into the operating chamber, the inner wall of the driving push ring is fitted with the inclined side walls of several pushing blocks, and the inclined side walls of the push ring approach the center axis of the fixed ring seat along the direction toward the driving push ring.

[0014] In a second aspect, the present application provides a method for testing the compressive strength of concrete, which adopts the following technical solution:

[0015] A method for testing the compressive strength of concrete comprises the following steps:

[0016] Step (1): placing the working end of the penetrometer body against the concrete side wall, using a support plate to form a limit between the penetrometer body and the concrete side wall, and the end wall of the support plate away from the penetrometer body is attached to the concrete side wall;

[0017] Step (2): operating the penetrometer body and detecting the displacement of the support plate along the concrete side wall during the operation;

[0018] Step (3): Analyze the moving distance of the support plate. If it is greater than the set value, repeat steps (1)-(3) until the displacement of the support plate meets the standard.

[0019] In summary, this application has the following beneficial effects:

[0020] 1. The present application utilizes a support plate to form a limiter between the penetrometer body and the concrete side wall, which can not only reduce the offset of the penetrometer on a surface perpendicular to the concrete side wall, but also determine the offset of the penetrometer body by detecting the displacement of the support plate along a surface parallel to the concrete side wall, which is conducive to obtaining more accurate detection data.

[0021] 2. In the stabilizing mechanism of the present application, under the action of the reverse linkage assembly, the stabilizing rollers in the same group that are radially opposite to each other along the fixed ring seat have opposite rotation tendencies, which can stabilize the support plate and then stabilize the penetrometer body, thereby improving detection accuracy; in addition, once the penetrometer body, that is, the support plate, has an excessively large offset, this will cause one of the stabilizing rollers in the same group to slip, etc., which will cause the linkage ring in the reverse linkage assembly to shift. At this time, the offset of the penetrometer body can be reflected by detecting the displacement of the linkage ring, thereby determining whether the detection data at this time is accurate, thereby facilitating the acquisition of more accurate data. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a concrete compressive strength detection device in an embodiment of the present application;

[0023] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0024] Figure 3 It is a structural diagram of the reverse linkage component in the embodiment of the present application;

[0025] Figure 4 is a schematic structural diagram of a stabilizing roller in an embodiment of the present application;

[0026] Figure 5 is a cross-sectional view of the reverse linkage assembly structure in an embodiment of the present application;

[0027] Figure 6 yes Figure 5 The enlarged view of point B in the middle;

[0028] Figure 7 is a cross-sectional view of the alarm component structure in an embodiment of the present application;

[0029] Figure 8yes Figure 7 Enlarged view of point C in the middle.

[0030] Explanation of the accompanying drawings: 1. Penetrometer body; 2. Installation assembly; 21. Elastic rubber pad; 22. Compacting block; 23. Driving member; 24. Dial block; 25. Feed groove; 26. Driving push ring; 27. Push block; 28. Threaded ring groove; 29. ​​Operating chamber; 3. Fixed ring seat; 31. Support plate; 32. Installation groove; 4. Stabilizing roller; 41. Base shaft; 42. Guide base block; 43. Telescopic column; 44. Pressure elastic member; 45. Gear; 5. Reverse linkage assembly; 51. First linkage roller; 52. Second linkage roller; 53. Linkage tooth plate; 54. Pull rod; 55. Linkage ring; 56. Accommodating ring cavity; 57. Accommodating oblique cavity; 58. Linkage gear; 59. Linkage belt; 6. Alarm assembly; 61. Displacement sensor; 62. Sensor block; 63. Make way groove; 64. Alarm. DETAILED DESCRIPTION

[0031] The present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0032] Example

[0033] like Figure 1 and Figure 2 As shown, this embodiment provides a concrete compressive strength testing device, including a penetrometer body 1 and a stabilizing mechanism detachably connected to the penetrometer body 1 through a mounting assembly 2. The penetrometer body 1 in this embodiment is a test host of a commonly used penetrating mortar strength tester, and the specific structure is not repeated here.

[0034] like Figure 1 and Figure 2 As shown, the stabilizing mechanism in this embodiment includes a fixed ring seat 3, a support plate 31 and a stabilizing roller 4. The penetrometer body 1 is detachably connected to the inner circumferential wall of the fixed ring seat 3 through the mounting assembly 2; the support plate 31 is an annular plate with a radius that gradually increases along the axial direction, and the end of the support plate 31 with a smaller radius is fixedly connected to the end wall of the fixed ring seat 3, and the support plate 31 and the fixed ring seat 3 share a central axis. The axial end wall of the support plate 31 away from the fixed seat is provided with mounting grooves 32 evenly arranged in the circumferential direction, and there are ten mounting grooves 32 in this embodiment. There are five groups of stabilizing rollers 4, two of them in a group. A stabilizing roller 4 is rotatably connected to the wall of each mounting groove 32, and the axes of the stabilizing rollers 4 in the same group are parallel and opposite to each other along the radial direction of the support plate 31. The peripheral walls of the stabilizing rollers 4 are flush with the end wall of the support plate 31 along the axial direction of the fixed ring seat 3 and away from the side of the fixed ring seat 3. A reverse linkage component 5 is arranged between the stabilizing rollers 4 in the same group to cause the stabilizing rollers 4 in the same group to rotate in the opposite direction. The stabilizing mechanism also includes an alarm component 6, which is used to detect the rotation of the stabilizing roller 4 to determine the degree of deviation of the penetrometer body 1 and to alarm.

[0035] When detecting the compressive strength of concrete, operate and install the assembly 2, fix the fixed ring seat 3 at a suitable position on the penetrometer body 1, and then operate the penetrometer body 1 normally. Make the end wall of the support plate 31 away from the fixed ring seat 3 and the end wall of the stabilizing roller 4 abut against the concrete side wall on the circumferential side of the penetrometer body 1 to achieve stable support for the penetrometer body 1. During the operation of the penetrometer body 1, when the operator makes a mistake and causes the penetrometer body 1 to deviate, the stabilizing rollers 4 in the same group in the deviation direction are driven to rotate in the opposite direction under the action of the reverse linkage assembly 5, and then generate a pulling force along the left and right sides in the deviation direction to limit the support plate 31, thereby improving the stability of the penetrometer body 1. At the same time, when the force generated by the deviation is too large and causes the stabilizing rollers 4 in the same group to lose their limiting effect, the alarm assembly 6 alarms, and the operator re-performs the detection.

[0036] As Figure 2 and Figure 4 shown, the stabilizing roller 4 includes a base shaft 41 rotatably connected to the groove wall of the installation groove 32. A number of guiding base blocks 42 are fixedly connected to the base shaft 41. The guiding base blocks 42 of the present application are in a U shape. A telescopic column 43 is slidably arranged on the inner wall of the guiding base block 42 in the radial direction of the base shaft 41. A pressure elastic member 44 is arranged between the end of the telescopic column 43 extending into the guiding base block 42 and the inner side wall of the guiding base block 42. The elastic member in this embodiment is an elastic block. The stabilizing roller 4 further includes a tooth 45 fixedly connected to the end of the telescopic column 43 extending out of the guiding base block 42. The stabilizing roller 4 in this embodiment can increase the resistance between it and the concrete side wall and improve the stability of the stabilizing roller 4.

[0037] As Figure 5 and Figure 6As shown, for the installation of the stabilizing mechanism, the installation assembly 2 in this embodiment includes an elastic rubber pad 21, a compacting block 22 and a driving member 23. The elastic rubber pad 21 is fixedly connected to the inner circumferential wall of the fixed ring seat 3. The elastic rubber pad 21 forms a closed ring and the inner circumferential wall is adapted to the shape of the circumferential wall of the mounting portion of the penetrometer body 1. A plurality of feed grooves 25 are provided on the inner side wall of the fixed ring seat 3. The notches of the feed grooves 25 are opposite to the elastic rubber pad 21. The compacting block 22 is arranged on the groove wall of the feed groove 25 along the radial sliding of the fixed ring seat 3. The driving member 23 includes a driving push ring 26 and a pushing block 27. An operating chamber 29 communicating with the sliding groove is provided in the fixed ring seat 3. In this embodiment, the operating chamber 29 is communicated with the accommodating ring chamber 56. The pushing block 27 is arranged on the side of the compacting block 22 away from the center of the fixed ring seat 3. The pushing block 27 is located in the operating chamber 29. The side wall of the pushing block 27 radially away from the compacting block 22 of the fixed ring seat 3 is an inclined surface. The inclined side wall of the pushing block 27 gradually approaches the central axis of the fixed ring seat 3 along the side away from the support plate 31. A threaded ring groove 28 is provided on the end wall of the fixed ring seat 3 away from the support plate 31. The driving push ring 26 is threadedly connected to the groove wall of the threaded ring groove 28 and has the same central axis as the fixed ring seat 3. The end wall of the driving push ring 26 extends into the operating chamber 29, and the inner wall of the driving push ring 26 fits with the inclined side walls of several pushing blocks 27. In order to facilitate the rotation of the driving push ring 26, several shifting blocks 24 are fixedly connected to the outer peripheral wall of the driving push ring 26.

[0038] First, insert the penetrometer body 1 into the inner side of the elastic rubber pad 21, taking care not to affect the normal operation of the penetrometer body 1. After the support plate 31 is moved to the appropriate position, rotate the drive push ring 26. The drive push ring 26 slides in the box operating cavity 29 by thread feed. At this time, the end wall of the drive push block squeezes the side wall of the push block 27, so that the push block 27 can squeeze the compacting block 22. The compacting block 22 squeezes the elastic rubber pad 21, so that the elastic rubber pad 21 is close to the side wall of the penetrometer body 1, and the fixed ring seat 3 is fixed on the penetrometer body 1.

[0039] like Figure 3 , Figure 5 and Figure 6As shown, the reverse linkage component 5 includes a first linkage roller 51, a second linkage roller 52, a linkage tooth plate 53, a pull rod 54 and a linkage ring 55. A housing ring cavity 56 having a common central axis with the fixed ring seat 3 is provided in the fixed ring seat 3. A plurality of housing oblique cavities 57 extending along the inclined side walls of the support plate 31 are provided in the support plate 31. The housing oblique cavities 57 and the mounting grooves 32 are arranged in a one-to-one correspondence; one end of the housing oblique cavity 57 is communicated with the corresponding mounting groove 32, and the other end is communicated with an end of the housing ring cavity 56 close to the support plate 31; each stabilizing roller 4 corresponds to a first linkage roller 51, and the first linkage roller 51 and the stabilizing roller 4 are coaxially connected; the second linkage roller 52 and the first linkage roller 51 are arranged in a one-to-one correspondence, and the second linkage roller 52 is rotatably connected to the cavity wall at the communicating position of the housing ring cavity 56 and the housing oblique cavity 57. A linkage belt 59 is connected between the first linkage roller 51 and the corresponding second linkage roller 52, and the linkage belt 59 passes through the housing oblique cavity 57. A linkage gear 58 is coaxially fixedly connected to the second linkage roller 52, and the linkage tooth plate 53 and the linkage gear 58 are arranged in a one-to-one correspondence. The linkage tooth plate 53 is radially slidably arranged on the side wall of the accommodating ring cavity 56 along the fixed ring seat 3, and the bottom wall of the linkage gear 58 is meshed with the top of the linkage tooth plate 53; the linkage ring 55 is axially slidably arranged on the cavity wall of the fixed ring cavity along the fixed ring seat 3 and shares the same central axis with the fixed ring seat 3, one end of the pull rod 54 is hinged on the outer peripheral wall of the linkage ring 55 and the hinge point is located on the same circle with the common central axis of the linkage ring 55, and both ends of the pull rod 54 are hinged on the linkage tooth plate 53 and the hinge points are located on the same circle with the common central axis of the linkage ring 55.

[0040] When one of the stabilizing rollers 4 in the same group tends to rotate, the force caused by the rotation will be transmitted to the linkage ring 55 through the first linkage roller 51, the linkage belt 59, the second linkage roller 52, the linkage gear 58, the linkage tooth plate 53 and the pull rod 54. At this time, the linkage ring 55 tends to slip along the axial direction of the fixed ring seat 3, and the force generated by the linkage ring 55 will be transmitted to the linkage tooth plate 53 along the other pull rod 54 in the same group, causing the two pairs of linkage gears 58 and linkage tooth plates 53 corresponding to the stabilizing rollers 4 in the same group to mesh in opposite directions, and then the opposite forces are transmitted to the stabilizing rollers 4 in the same group through the second linkage roller 52, the linkage belt 59 and the first linkage roller 51 in turn. The two stabilizing rollers 4 in the same group rotate in opposite directions, and the resistance generated between them and the concrete side wall is opposite, thereby playing a role in stabilizing the support plate 31.

[0041] like Figure 7 and Figure 8As shown, the alarm assembly 6 in this embodiment includes a displacement sensor 61, a sensor block 62 and an alarm 64. A clearance groove 63 is provided on the circumferential wall of the linkage ring 55. The clearance groove 63 extends along the axial direction of the linkage ring 55. The sensor block 62 is fixedly connected to the circumferential wall of the linkage ring 55 and is located in the middle of the clearance groove 63. Displacement sensors 61 are installed on both end walls of the clearance groove 63 along the axial direction of the linkage ring 55. The displacement sensor 61 is opposite to the sensor block 62 along the axial direction of the linkage ring 55. When the stabilizing rollers 4 in the same group cannot stabilize the support plate 31 well, one of the stabilizing rollers 4 will rotate, the linkage ring 55 will be displaced, and the other stabilizing roller 4 will slip on the concrete side wall. At this time, the displacement sensor 61 can make a judgment based on the displacement setting value set. Once the displacement of the linkage ring 55 exceeds the setting value, the displacement sensor 61 controls the alarm 64 to start the alarm.

[0042] The present application also provides a method for testing the compressive strength of concrete, comprising the following steps:

[0043] The stabilizing mechanism is pre-installed on the penetrometer body 1 .

[0044] Step (1): The flat head of the penetrometer body 1 is pressed against the concrete side wall, so that the end wall of the support plate 31 is pressed against the concrete side wall, thereby forming a limit between the penetrometer body 1 and the concrete side wall, and the penetrometer and the concrete side wall are perpendicular;

[0045] Step (2): operate the penetrometer body 1 to work, and detect the displacement of the support plate 31 along the concrete side wall during the process; the specific process is as follows:

[0046] If the penetrometer body 1 has a tendency to vibrate or deviate along the concrete side wall at the moment of operation, since the two stabilizing rollers 4 in the same group rotate in opposite directions, the resistance generated between them and the concrete side wall is opposite, thereby playing a role in stabilizing the support plate 31; if the penetrometer body 1 deviates too much, the two stabilizing rollers 4 in the same group are not enough to stabilize the support plate 31, so that the support plate 31 deviates with the penetrometer, which will cause one of the stabilizing rollers 4 to rotate, the linkage ring 55 to be displaced, and the other stabilizing roller 4 to slip on the concrete side wall. At this time, the displacement sensor 61 reflects the displacement of the support plate 31 according to the displacement of the linkage ring 55;

[0047] Step (3): Analyze the moving distance of the support plate 31. If it is greater than the set value, the alarm will sound 64, and steps (1)-(3) will be repeated until the displacement of the support plate 31 meets the standard.

[0048] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A concrete compressive strength testing device, comprising a penetrometer body (1), characterized in that: The invention also comprises a stabilizing mechanism which is detachably connected to the penetrometer body (1) via a mounting assembly (2), the stabilizing mechanism comprising a fixed ring seat (3), a support plate (31) and a stabilizing roller (4), the penetrometer body (1) being detachably connected to the inner peripheral wall of the fixed ring seat (3) via the mounting assembly (2); the support plate (31) being an annular plate and having a radius which gradually increases along the axial direction, the end of the support plate (31) having a smaller radius being connected to the end wall of the fixed ring seat (3), the support plate (31) and the fixed ring seat (3) sharing a central axis; the axial end wall of the support plate (31) which is away from the fixed ring seat (3) is provided with a mounting groove (32), the stabilizing roller (4) ) two in a group, several groups of the stabilizing rollers (4) are rotatably connected to the groove wall of the mounting groove (32), the axes of the stabilizing rollers (4) in the same group are parallel and opposite to each other along the radial direction of the support plate (31), the peripheral walls of the stabilizing rollers (4) are flush with the end wall of the support plate (31) along the axial direction of the fixed ring seat (3) and away from the fixed ring seat (3), and a reverse linkage component (5) is arranged between the stabilizing rollers (4) in the same group to promote the reverse rotation of the stabilizing rollers (4) in the same group; the stabilizing mechanism also includes an alarm component (6), which is used to detect the rotation of the stabilizing rollers (4) to determine the degree of deviation of the penetrometer body (1) and to alarm; The reverse linkage component (5) comprises a first linkage roller (51), a second linkage roller (52), a linkage tooth plate (53), a pull rod (54) and a linkage ring (55); the fixed ring seat (3) is provided with a housing ring cavity (56) having a common central axis with the fixed ring seat (3); the support plate (31) is provided with a plurality of housing oblique cavities (57) extending along the inclined side walls of the support plate (31); the housing ring cavity (56) is close to the support plate (31) and the mounting groove (32) and is in communication with the housing oblique cavity (57); the first linkage roller (51) and the stabilizing roller (4) are coaxially connected; the second linkage roller (52) and the first linkage roller (51) are arranged in a one-to-one correspondence and are rotatably connected to the cavity wall of the housing ring cavity (56) close to the housing oblique cavity (57); the first linkage roller (51) and the corresponding second linkage roller (52) are connected to each other. A linkage belt (59) is connected, and the linkage belt (59) passes through the inclined accommodating cavity (57); a linkage gear (58) is arranged on the second linkage roller (52), and the linkage tooth plate (53) and the linkage gear (58) are arranged one by one, and the linkage tooth plate (53) is arranged on the side wall of the accommodating ring cavity (56) along the radial sliding direction of the fixed ring seat (3), and the linkage gear (58) and the linkage tooth plate (53) are meshed, and the meshing directions of the two pairs of linkage gears (58) and the linkage tooth plate (53) corresponding to the same group of stabilizing rollers (4) are opposite; the linkage ring (55) is arranged on the cavity wall of the fixed ring cavity along the axial sliding direction of the fixed ring seat (3) and has a common central axis with the fixed ring seat (3), one end of the pull rod (54) is hinged on the outer peripheral wall of the linkage ring (55), and the two ends of the pull rod (54) are hinged on the linkage tooth plate (53); The alarm component (6) comprises a displacement sensor (61), a sensing block (62) and an alarm (64). A clearance groove (63) is provided through the circumferential wall of the linkage ring (55). The clearance groove (63) extends along the axial direction of the linkage ring (55). The sensing block (62) is provided on the circumferential wall of the linkage ring (55) and is located in the middle of the clearance groove (63). Displacement sensors (61) are provided on the groove walls at both ends of the clearance groove (63) along the axial direction of the linkage ring (55). The displacement sensor (61) is opposite to the sensing block (62) along the axial direction of the linkage ring (55). The displacement sensor (61) controls the operation of the alarm (64).

2. A concrete compressive strength testing device according to claim 1, characterized in that: The stabilizing roller (4) comprises a base shaft (41) rotatably connected to the groove wall of the mounting groove (32) and latching teeth (45) arranged on the circumferential wall of the base shaft (41).

3. A concrete compressive strength testing device according to claim 2, characterized in that: A plurality of guide base blocks (42) are fixedly connected to the base shaft (41); a telescopic column (43) is provided on the inner wall of the guide base block (42) to slide radially along the base shaft (41); a pressure elastic member (44) is provided between one end of the telescopic column (43) extending into the guide base block (42) and the inner wall of the guide base block (42); and the latching tooth (45) is provided at one end of the telescopic column (43) extending out of the guide base block (42).

4. A concrete compressive strength testing device according to claim 1, characterized in that: The mounting assembly (2) comprises an elastic rubber pad (21), a compacting block (22) and a driving member (23); the elastic rubber pad (21) is arranged on the inner peripheral wall of the fixed ring seat (3); the elastic rubber pad (21) forms a closed ring and the inner peripheral wall is adapted to the peripheral wall of the mounting portion of the penetrometer body (1); a plurality of feed grooves (25) are arranged on the inner side wall of the fixed ring seat (3); the notches of the feed grooves (25) are opposite to the elastic rubber pad (21); the compacting block (22) is arranged on the groove wall of the feed groove (25) along the radial sliding direction of the fixed ring seat (3); the driving member (23) is arranged on the fixed ring seat (3) and connected to the compacting block (22).

5. A concrete compressive strength testing device according to claim 4, characterized in that: The driving member (23) comprises a driving push ring (26) and a push block (27); an operating cavity (29) communicating with the feed groove (25) is arranged in the fixed ring seat (3); the push block (27) is arranged on a side of the compacting block (22) away from the center of the fixed ring seat (3); the push block (27) is located in the operating cavity (29); and the push block (27) is radially away from the compacting block (22) along the fixed ring seat (3). The side wall is an inclined surface, the driven push ring (26) is threadedly connected to the fixed ring seat (3) and has a common center axis with the fixed ring seat (3), the end wall of the driven push ring (26) extends into the operating cavity (29), the inner wall of the driven push ring (26) is in contact with the inclined side walls of a plurality of push blocks (27), and the inclined side walls of the push blocks (27) approach the center axis of the fixed ring seat (3) along the direction toward the driven push ring (26).

6. A method for testing the compressive strength of concrete using the concrete compressive strength testing device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step (1): placing the working end of the penetrometer body (1) against the concrete side wall, using a support plate (31) to form a limit between the penetrometer body (1) and the concrete side wall, and the end wall of the support plate (31) away from the penetrometer body (1) is attached to the concrete side wall; Step (2): operating the penetrometer body (1) to work, and in the process detecting the displacement of the support plate (31) along the concrete side wall; Step (3): Analyze the moving distance of the support plate (31). If the moving distance is greater than the set value, repeat steps (1) to (3) until the displacement of the support plate (31) meets the standard.

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