A concrete bonding strength testing device

Abstract

The present invention relates to the technical field of concrete testing, and the application discloses a device for testing the bonding strength of concrete, comprising a base, a negative pressure chamber fixedly installed on the top of the base, a top hole opened at a central position on the top of the negative pressure chamber, a connecting shaft seat fixedly installed on the top of the negative pressure chamber at a position outside the top hole, a rotating device movably sleeved on the outer surface of the connecting shaft seat, a force-applying device movably installed inside the rotating device, the rotating device as a whole loses its limiting effect and rotates, the elastic force of the force-applying spring is released and pushes the lower pressure seat downward, during this process, the pressure sensor constantly detects the elastic force data of the force-applying spring, and the operator can calculate the shear force limit borne by the bonding seat and the bonding concrete block according to the peak value of the elastic force stored in the force-applying spring, thereby obtaining the bonding strength of the concrete, and during the testing process, the load-bearing sleeve can apply the force more evenly to the outer surface of the bonding concrete block.

Description

Technical Field

[0001] The present application relates to the technical field of concrete detection, and in particular to a concrete bonding strength detection device. Background Art

[0002] Concrete of different specifications has different physical properties, and bonding strength is one of the important indicators of concrete. In order to ensure that the bonding strength of concrete can be suitable for engineering operations, a concrete bonding strength testing device is used for experiments. Traditional testing devices use telescopic rods to squeeze the concrete bonding points to form shear force until the bonding points break. The concrete bonding strength is obtained by the pressure output by the telescopic rod at this time. However, during the testing process, since the contact area between the telescopic rod and the concrete block is small, a large pressure will be generated on the surface of the concrete block when pressure is applied, causing the concrete bonding points to break and collapse before breaking, resulting in a decrease in testing accuracy. In this regard, the present application document proposes a concrete bonding strength testing device to solve the above-mentioned problems. Summary of the invention

[0003] The present application proposes a concrete bonding strength detection device, which has the advantage of being able to better apply shear force to the bonded concrete blocks, and is used to solve the problem of deformation and shrinkage caused by excessive local pressure on the bonded concrete blocks.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a concrete bonding strength detection device, comprising a base, a negative pressure bin is fixedly installed on the top of the base, a top hole is opened at a center position on the top of the negative pressure bin, a connecting shaft seat is fixedly installed at a position on the top of the negative pressure bin outside the top hole, a rotating device is movably sleeved on the outer surface of the connecting shaft seat, a second mounting groove is provided at a position on the top of the negative pressure bin outside the rotating device, the number of the second mounting grooves is six and they are distributed in a ring array, a bonding seat is provided inside the second mounting groove, and the top surface of the bonding seat is kept flush with the top surface of the second mounting groove.

[0005] Specifically, a travel device is provided on a movable sleeve near the top of the inner cavity of the negative pressure bin, and a return spring is clamped at the bottom of the travel device. The bottom of the return spring is fixedly connected to the bottom of the inner cavity of the negative pressure bin. When the travel device is pressed down, the return spring is compressed and stores elastic force. When the hydraulic telescopic machine is lifted, the elastic force stored in the return spring will drive the travel device to reset.

[0006] Specifically, a force-applying device is movably installed inside the rotating device, a vertical frame is fixedly installed on the top of the base at positions on both sides of the negative pressure bin, a hydraulic telescopic machine is fixedly installed on the top of the vertical frame at a middle position, and the output shaft of the hydraulic telescopic machine extends into the interior of the rotating device, and a force-applying device is opened on the top of the negative pressure bin at a position between the second mounting grooves, and the interior is fixedly installed.

[0007] Furthermore, the stroke device includes a stroke plate, the outer surface of the stroke plate is fixed with an outer sealing strip, a matching inner hole is opened at the top of the stroke plate near the outer side, and the inner wall of the matching inner hole is fixed with an inner sealing strip.

[0008] Specifically, the outer side of the outer sealing strip contacts the inner wall of the negative pressure chamber, and the inner side of the inner sealing strip contacts the outer surface of the second mounting groove, so that the travel plate is sealed from the inner wall of the negative pressure chamber and the outer surface of the second mounting groove, preventing the gas on the upper and lower sides of the travel plate from circulating with each other.

[0009] Furthermore, the rotating device includes a rotating drum, and a matching shaft hole is provided at the bottom of the rotating drum. The matching shaft hole is movably sleeved with the connecting shaft seat, and the matching shaft hole can rotate with its own axis as the rotation center.

[0010] Specifically, the inner wall of the rotating drum is provided with a first mounting groove, the interior of the first mounting groove is clamped with a guide device, the outer surface of the rotating drum is provided with a connecting convex plate, the number of the connecting convex plates is six and they are distributed in a circular array, the top of the connecting convex plate is provided with a clamping hole, the interior of the clamping hole is movably provided with a mounting rod, the mounting rod extends from the bottom of the clamping hole, and the outer surface of the protruding part is provided with a bearing device, when the mounting rod is pulled out, the bearing device is disengaged from the connecting convex plate, and the bearing device can be disassembled.

[0011] Specifically, the force applying device is movably installed inside the rotating drum.

[0012] Furthermore, the guide device comprises a guide plate, an inner side of the guide plate is provided with a guide bevel groove, the guide bevel groove cooperates with the force applying device, and both sides and the bottom of the guide plate are provided with limit plates.

[0013] Specifically, the guide plate is installed inside the first installation groove, and after installation, the limiting plate is engaged with the first installation groove.

[0014] Furthermore, the bearing device includes a bearing plate, a fixing hole is opened at a position near the inner side of the top of the bearing plate, the fixing hole is fitted with the bottom of the mounting rod, a bearing hole is opened at the top of the bearing plate, a bearing sleeve is placed inside the bearing hole, and the bearing sleeve has different models, and the diameter of the inner hole of different models is different, so that the contact area between the bonding concrete block and the top of the bonding seat is different.

[0015] Specifically, the concrete to be tested can be directly poured into the interior of the bonding concrete block and compacted, and after the concrete solidifies, the bottom of the bonding concrete block will naturally bond with the top of the bonding seat.

[0016] Specifically, a bonding concrete block is disposed inside the bearing sleeve, and the bottom of the bonding concrete block is bonded to the bonding seat;

[0017] Specifically, in the initial state, the axis of the bearing sleeve and the axis of the second mounting groove are located on the same center line.

[0018] Furthermore, the force-applying device includes a top seat, and a force-applying protrusion is provided on the outer surface of the top seat near the top. The force-applying protrusion cooperates with the guide inclined groove, so that when the hydraulic telescopic machine is pressed downward, the guide inclined groove is subjected to the circumferential force of the force-applying protrusion, so that the rotating drum tends to rotate, thereby applying shear force to the connection between the bonding concrete block and the bonding seat.

[0019] Specifically, a lower pressure seat is fixedly installed at the bottom of the top seat, a pressure sensor is provided on a movable sleeve near the bottom of the inner cavity of the lower pressure seat, a force spring is clamped at the top of the pressure sensor, a gasket is arranged between the pressure sensor and the force spring, a lower pressure rod is fixedly installed at the bottom of the outer surface of the force protrusion, and the bottom of the lower pressure rod is fixedly connected to the stroke plate.

[0020] This application has the following beneficial effects.

[0021] The user can directly pour the concrete to be tested into the interior of the bearing sleeve and tamp it. When the concrete solidifies, a bonding concrete block is formed, and its bottom naturally bonds to the top of the bonding seat, which reduces the difficulty of using the device. The device can also replace the specifications of the bearing sleeve to adjust the contact area between the bonding concrete block and the bonding seat. At the same time, a single bearing device can be set to perform bonding strength testing on a single group of bonding concrete blocks and bonding seats. At the same time, the device can also be set with multiple groups of bearing devices to perform bonding strength testing on multiple groups of bonding concrete blocks and bonding seats at the same time, and the average value is calculated through the final result. In addition, the bearing sleeve can apply the force more evenly on the outer surface of the bonding concrete block to avoid the situation where the local pressure on the bonding concrete block is too high, which causes deformation and shrinkage, resulting in inaccurate test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0023] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a cross-sectional view of the structure of the present invention;

[0026] Figure 3 It is the main structure diagram of the structure of the present invention;

[0027] Figure 4 It is a cross-sectional view of the main structure of the present invention;

[0028] Figure 5 It is a structural stroke device diagram of the present invention;

[0029] Figure 6 This is a diagram of the structural rotating device of the present invention;

[0030] Figure 7 It is a cross-sectional view of the rotating device of the structure of the present invention;

[0031] Figure 8 It is a structural guide device diagram of the present invention;

[0032] Fig. 9 This is a diagram of the structural bearing device of the present invention;

[0033] Fig.10 It is a cross-sectional view of the structural bearing device of the present invention;

[0034] Fig.11 This is a diagram of a force applying device for the structure of the present invention;

[0035] Fig.12 It is a cross-sectional view of the structural force applying device of the present invention.

[0036] In the figure; 1, base; 2, negative pressure bin; 3, top hole; 4, connecting shaft seat; 5, rotating device; 51, rotating roller; 52, matching shaft hole; 53, first mounting groove; 54, guiding device; 541, guide plate; 542, guide inclined groove; 543, limit plate; 55, connecting convex plate; 56, clamping hole; 57, mounting rod; 58, bearing device; 581, bearing plate; 582, fixing hole; 583, bearing hole; 584, bearing Carrying sleeve; 585, bonding concrete block; 6, second mounting groove; 7, bonding seat; 8, stroke device; 81, stroke plate; 82, outer sealing strip; 83, matching inner hole; 84, inner sealing strip; 9, reset spring; 10, force device; 101, top seat; 102, force protrusion; 103, lower pressure seat; 104, pressure sensor; 105, force spring; 106, lower pressure rod; 11, stand; 12, hydraulic telescopic machine. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] A concrete bond strength testing device, see Figure 1-Figure 4 , including a base 1, a negative pressure bin 2 is fixedly installed on the top of the base 1, a top hole 3 is opened at the center position of the top of the negative pressure bin 2, a connecting shaft seat 4 is fixedly installed at the position outside the top hole 3 on the top of the negative pressure bin 2, a rotating device 5 is movably sleeved on the outer surface of the connecting shaft seat 4, a second mounting groove 6 is provided on the top of the negative pressure bin 2 at the outside of the rotating device 5, the number of the second mounting grooves 6 is six and they are distributed in a ring array, a bonding seat 7 is provided inside the second mounting groove 6, and the top surface of the bonding seat 7 is kept flush with the top surface of the second mounting groove 6.

[0039] See also Figure 1-Figure 4 A travel device 8 is movablely sleeved near the top of the inner cavity of the negative pressure bin 2, and a return spring 9 is clamped at the bottom of the travel device 8. The bottom of the return spring 9 is fixedly connected to the bottom of the inner cavity of the negative pressure bin 2. When the travel device 8 is pressed down, the return spring 9 is compressed and stores elastic force. When the hydraulic telescopic machine 12 is lifted, the elastic force stored in the return spring 9 will drive the travel device 8 to reset.

[0040] See also Figure 1-Figure 4A force-applying device 10 is movably installed inside the rotating device 5, a stand 11 is fixedly installed on the top of the base 1 at positions on both sides of the negative pressure bin 2, a hydraulic telescopic machine 12 is fixedly installed on the top of the stand 11 at a middle position, and the output shaft of the hydraulic telescopic machine 12 extends into the interior of the rotating device 5, and a 13 is opened on the top of the negative pressure bin 2 between the second mounting grooves 6, and 14 is fixedly installed inside 13.

[0041] See also Figure 5 The travel device 8 includes a travel plate 81, an outer surface fixed sleeve of the travel plate 81 is provided with an outer sealing strip 82, a matching inner hole 83 is opened at the top of the travel plate 81 near the outer side, and an inner wall fixed sleeve of the matching inner hole 83 is provided with an inner sealing strip 84.

[0042] See also Figure 3-Figure 5 The outer side of the outer sealing strip 82 contacts the inner wall of the negative pressure chamber 2, and the inner side of the inner sealing strip 84 contacts the outer surface of the second mounting groove 6, so that the travel plate 81 is sealed with the inner wall of the negative pressure chamber 2 and the outer surface of the second mounting groove 6, preventing the gas on the upper and lower sides of the travel plate 81 from circulating with each other.

[0043] See also Figure 3-Figure 4 and Figure 6 The rotating device 5 includes a rotating drum 51. A matching shaft hole 52 is provided at the bottom of the rotating drum 51. The matching shaft hole 52 is movably sleeved with the connecting shaft seat 4. The matching shaft hole 52 can rotate with its own axis as the rotation center.

[0044] See also Figure 6-Figure 7 A first mounting groove 53 is provided on the inner wall of the rotating drum 51, and a guide device 54 is clamped inside the first mounting groove 53. A connecting convex plate 55 is provided on the outer surface of the rotating drum 51. The number of the connecting convex plates 55 is six and they are distributed in a circular array. A clamping hole 56 is provided on the top of the connecting convex plate 55. A mounting rod 57 is movably installed inside the clamping hole 56. The mounting rod 57 extends from the bottom of the clamping hole 56, and a bearing device 58 is provided on the outer surface of the protruding part. When the mounting rod 57 is pulled out, the bearing device 58 is separated from the connecting convex plate 55, and the bearing device 58 can be disassembled.

[0045] See also Figure 2 and Figure 7 The force applying device 10 is movably installed inside the rotating drum 51.

[0046] See also Figure 2 and Fig.10 The guide device 54 includes a guide plate 541 , a guide bevel groove 542 is provided on the inner side of the guide plate 541 , the guide bevel groove 542 cooperates with the force applying device 10 , and limiting plates 543 are provided on both sides and the bottom of the guide plate 541 .

[0047] See also Figure 6-Figure 8 The guide plate 541 is installed inside the first installation groove 53 , and after installation, the limiting piece 543 is engaged with the first installation groove 53 .

[0048] See also Figure 4 , Figure 6-Figure 7 and Figure 9-10 The bearing device 58 includes a bearing plate 581. A fixing hole 582 is opened at the top of the bearing plate 581 near the inner side. The fixing hole 582 is fitted with the bottom of the mounting rod 57. A bearing hole 583 is opened at the top of the bearing plate 581. A bearing sleeve 584 is placed inside the bearing hole 583. The bearing sleeve 584 has different models. The diameter of the inner hole of different models is different, so that the contact area between the bonding concrete block 585 and the top of the bonding seat 7 is different.

[0049] See also Figure 4 and Fig. 9 The concrete to be tested can be directly poured into the interior of the bonding concrete block 585 and compacted. After the concrete solidifies, the bottom of the bonding concrete block 585 will naturally bond with the top of the bonding seat 7.

[0050] See also Figure 4 and Fig. 9 , a bonding concrete block 585 is provided inside the bearing sleeve 584, and the bottom of the bonding concrete block 585 is bonded to the bonding seat 7;

[0051] See also Figure 4 and Fig.10 In the initial state, the axis of the bearing sleeve 584 and the axis of the second mounting groove 6 are located on the same center line.

[0052] When the fixing hole 582 is matched with the mounting rod 57, the bearing plate 581 is fixed and connected to the connecting protruding plate 55. At this time, the bearing sleeve 584 is placed inside the bearing hole 583 so that the bottom of the bearing sleeve 584 contacts the top of the bonding seat 7. Concrete is directly poured into the bearing sleeve 584 and compacted. After the concrete is completely solidified, a bonding concrete block 585 is formed. At this time, the bottom of the bonding concrete block 585 is completely bonded to the top of the bonding seat 7, and the bonding area is the same as the cross-sectional area of ​​the opening of the bearing sleeve 584, so that the difficulty of preparing the bonding concrete block 585 is reduced, and the bonding area can also be well controlled, which reduces the difficulty and accuracy of preparing the bonding concrete block 585, reduces the difficulty of using the device, and improves the practicality of the device.

[0053] According to the detection requirements, when the contact surface between the bonding concrete block 585 and the bonding seat 7 needs to be adjusted, the bearing sleeves 584 of different specifications can be replaced. The bearing sleeves 584 of different specifications have inner hole diameters of different specifications, so that after the concrete is injected into the inner hole of the bearing sleeve 584 and solidified, the bonding area between the bottom of the bearing sleeve 584 and the top of the bonding seat 7 is also changed, so that the device can adjust the bonding area between the bonding concrete block 585 and the bonding seat 7 according to different detection requirements, thereby improving the practicality of the device.

[0054] While the device can be provided with a single load-bearing device 58, so as to perform a bonding strength test on a single group of bonding concrete blocks 585 and bonding seats 7, the device can also be provided with multiple groups of load-bearing devices 58, so as to perform a bonding strength test on multiple groups of bonding concrete blocks 585 and bonding seats 7 at the same time, and the average value is calculated through the final result to obtain a bonding degree that is closer to the actual degree of concrete, so that the detection means of the device is more flexible and the results obtained are more accurate.

[0055] See also Figure 2 , Figure 8 and Figure 10-12 The force-applying device 10 includes a top seat 101, and a force-applying protrusion 102 is provided on the outer surface of the top seat 101 near the top. The force-applying protrusion 102 cooperates with the guide inclined groove 542, so that when the hydraulic telescopic machine 12 is pressed down, the guide inclined groove 542 is subjected to the circumferential force of the force-applying protrusion 102, so that the rotating drum 51 tends to rotate, thereby applying shear force to the connection between the bonding concrete block 585 and the bonding seat 7.

[0056] See also Figure 5 and Figure 11-Figure 12 A lower pressure seat 103 is fixedly installed at the bottom of the top seat 101, and a pressure sensor 104 is movably sleeved on the inner cavity of the lower pressure seat 103 near the bottom. A force spring 105 is clamped on the top of the pressure sensor 104, and a gasket is arranged between the pressure sensor 104 and the force spring 105. A lower pressure rod 106 is fixedly installed at the bottom of the outer surface of the force protrusion 102, and the bottom of the lower pressure rod 106 is fixedly connected to the stroke plate 81.

[0057] The device is pressed down by the hydraulic telescopic machine 12 and contacts with the top of the force spring 105. When the force spring 105 is compressed, the lower pressure seat 103 will also receive a vertical downward force at the same time. Since the force protrusion 102 is in a matched state with the guide inclined groove 542, the two ends of the lower pressure rod 106 are respectively fixedly connected to the lower pressure seat 103 and the stroke plate 81, and the stroke plate 81 is limited by the second mounting groove 6 and cannot rotate, so that the force-applying device 10 as a whole cannot rotate. At this time, the downward force applied to the lower pressure seat 103 will be transmitted to the guide inclined groove 542 through the force protrusion 102, so that the rotating drum 51 has a tendency to rotate circumferentially, and the rotation tendency is transmitted to the bearing sleeve 584 through the connecting convex plate 55, the mounting rod 57 and the bearing plate 581, thereby acting on the outer surface of the bonding concrete block 585, and a shear effect is generated at the bonding point between the bonding concrete block 585 and the bonding seat 7. The hydraulic telescopic machine 12 continues to press down, and the bonding concrete block 58 5 and the bonding seat 7 are subjected to the shear force which is continuously increased until the bonding concrete block 585 and the bonding seat 7 are disconnected. At this time, the rotating device 5 loses its limiting function as a whole and rotates. The elastic force of the force spring 105 is released and pushes the lower pressure seat 103 downward. During this process, the pressure sensor 104 constantly detects the elastic force data of the force spring 105. The operator can calculate the shear force limit borne by the bonding seat 7 and the bonding concrete block 585 according to the peak value of the elastic force stored in the force spring 105, thereby obtaining the bonding strength of the concrete. During the detection process, the bearing sleeve 584 can apply the force more evenly to the outer surface of the bonding concrete block 585. The traditional concrete bonding strength detection device applies the shear force to the connection position, which makes the local concrete receive too much pressure, which is easy to cause deformation and collapse at the force application position, resulting in inaccurate final detection results. The present application document avoids this problem well and improves the accuracy of the detection results.

[0058] When the bonding concrete block 585 and the bonding seat 7 are separated under the action of shear force, the lower pressure seat 103 will be pressed down, and at the same time, the stroke device 8 will be driven downward through the lower pressure rod 106, so that negative pressure is formed in the space above the stroke device 8 inside the negative pressure bin 2, and the outside air enters the negative pressure area through 14, thereby absorbing the broken dust formed by the disconnection of the bonding concrete block 585 and the bonding seat 7 into the inside of the negative pressure bin 2, and the bonding concrete block 585 and the bonding seat 7 rotate the roller 51 after disconnection, so that the disconnected bonding concrete block 585 will move to the top of 13, so that it can better absorb the broken dust, avoid pollution to the surrounding environment, and improve the reliability of the device.

[0059] The method of use of the present invention is as follows:

[0060] Before use, when it is necessary to adjust the contact surface between the bonding concrete block 585 and the bonding seat 7 according to the detection requirements, the bearing sleeves 584 of different specifications can be replaced. The bearing sleeves 584 of different specifications have different specifications of inner hole diameters, so that after the concrete is injected into the inner hole of the bearing sleeve 584 and solidifies, the bonding area between the bottom of the bearing sleeve 584 and the top of the bonding seat 7 also changes, so that the device can adjust the bonding area between the bonding concrete block 585 and the bonding seat 7 according to different detection requirements.

[0061] During use, the base to be bonded with concrete is installed inside the second mounting groove 6, and the bearing device 58 is installed. The bearing device 58 and the connecting convex plate 55 are connected and fixed by using the mounting rod 57. At this time, the bearing sleeve 584 is placed inside the bearing hole 583, so that the bottom of the bearing sleeve 584 contacts the top of the bonding seat 7, and concrete is directly poured into the bearing sleeve 584 and tamped. After the concrete is completely solidified, a bonding concrete block 585 is formed. At this time, the bottom of the bonding concrete block 585 is completely bonded to the top of the bonding seat 7, and the bonding area is the same as the cross-sectional area of ​​the opening of the bearing sleeve 584. When the device can be provided with a single bearing device 58, a single group of bonding concrete blocks 585 and bonding concrete blocks 585 can be bonded. The bonding strength of the bonding seat 7 is tested. At the same time, the device can also be provided with multiple groups of bearing devices 58, so as to simultaneously test the bonding strength of multiple groups of bonding concrete blocks 585 and the bonding seat 7, and the average value is calculated through the final result, so as to obtain a bonding degree closer to the actual concrete. The device is pressed down by the hydraulic telescopic machine 12 and contacts with the top of the force spring 105. When the force spring 105 is compressed, the lower pressure seat 103 will also receive a vertical downward force at the same time. Since the force protrusion 102 is in a matched state with the guide inclined groove 542, the two ends of the lower pressure rod 106 are respectively fixedly connected to the lower pressure seat 103 and the stroke plate 81, and the stroke plate 81 is limited by the second mounting groove 6 and cannot rotate, so that the force device 10 as a whole cannot be moved. The downward force on the lower pressing seat 103 is transmitted to the guide inclined groove 542 through the force-applying protrusion 102, so that the rotating drum 51 has a tendency to rotate in the circumferential direction, and the rotation tendency is transmitted to the bearing sleeve 584 through the connecting protrusion 55, the mounting rod 57 and the bearing plate 581, thereby acting on the outer surface of the bonding concrete block 585, and a shearing effect is generated at the bonding point between the bonding concrete block 585 and the bonding seat 7. The hydraulic telescopic machine 12 is continuously pressed downward, and the shearing force on the bonding point between the bonding concrete block 585 and the bonding seat 7 is continuously increased until the bonding concrete block 585 and the bonding seat 7 are disconnected. At this time, the rotating device 5 loses its limiting effect as a whole and rotates, and the elastic force of the force-applying spring 105 Release and push the lower pressure seat 103 downward. During this process, the pressure sensor 104 constantly detects the elastic force data of the force spring 105. The operator can calculate the shear force limit borne by the bonding seat 7 and the bonding concrete block 585 based on the peak value of the elastic force stored in the force spring 105, thereby obtaining the bonding strength of the concrete. During the detection process, the bearing sleeve 584 can apply the force more evenly to the outer surface of the bonding concrete block 585. When the bonding concrete block 585 and the bonding seat 7 are separated under the action of the shear force, the lower pressure seat 103 will be pressed downward, and at the same time, the stroke device 8 will be driven downward through the lower pressure rod 106, which forms a negative pressure in the space above the stroke device 8 inside the negative pressure chamber 2, and the outside air enters the negative pressure area through 14.Thus, the broken dust formed by the disconnection of the bonding concrete block 585 and the bonding seat 7 is adsorbed into the interior of the negative pressure chamber 2, and the bonding concrete block 585 and the bonding seat 7 rotate the roller 51 after disconnection, so that the disconnected bonding concrete block 585 will move to the top of 13, so that it can better adsorb the broken dust.

Claims

1. A concrete bond strength detection device, characterized in that: The invention comprises a base (1), a negative pressure chamber (2) is fixedly mounted on the top of the base (1), a top hole (3) is opened at a central position on the top of the negative pressure chamber (2), a connecting shaft seat (4) is fixedly mounted at a position on the outside of the top hole (3) on the top of the negative pressure chamber (2), a rotating device (5) is movably sleeved on the outer surface of the connecting shaft seat (4), a second mounting groove (6) is arranged at a position on the outside of the rotating device (5) on the top of the negative pressure chamber (2), the number of the second mounting grooves (6) is six and they are distributed in a circular array, an adhesive seat (7) is arranged inside the second mounting groove (6), A travel device (8) is movably mounted on a position near the top of the inner cavity of the negative pressure chamber (2); a return spring (9) is clamped at the bottom of the travel device (8); the bottom of the return spring (9) is fixedly connected to the bottom of the inner cavity of the negative pressure chamber (2); a force-applying device (10) is movably mounted inside the rotating device (5); a stand (11) is fixedly mounted on the top of the base (1) at positions on both sides of the negative pressure chamber (2); a hydraulic telescopic machine (12) is fixedly mounted on the top of the stand (11) at a position in the middle; the output shaft of the hydraulic telescopic machine (12) extends into the interior of the rotating device (5).

2. A concrete bond strength detection device according to claim 1, characterized in that: The stroke device (8) comprises a stroke plate (81), an outer surface of the stroke plate (81) is fixedly sleeved with an outer sealing strip (82), a matching inner hole (83) is opened at a position close to the outer side of the top of the stroke plate (81), and an inner wall of the matching inner hole (83) is fixedly sleeved with an inner sealing strip (84); The outer side of the outer sealing strip (82) contacts the inner wall of the negative pressure chamber (2), and the inner side of the inner sealing strip (84) contacts the outer surface of the second mounting groove (6).

3. A concrete bonding strength detection device according to claim 2, characterized in that: The rotating device (5) comprises a rotating drum (51), a matching shaft hole (52) is provided at the bottom of the rotating drum (51), the matching shaft hole (52) is movably sleeved with the connecting shaft seat (4), a first mounting groove (53) is provided on the inner wall of the rotating drum (51), a guide device (54) is clamped inside the first mounting groove (53), a connecting convex plate (55) is provided on the outer surface of the rotating drum (51), the number of the connecting convex plates (55) is six and they are distributed in a circular array, a clamping hole (56) is provided on the top of the connecting convex plate (55), a mounting rod (57) is movably mounted inside the clamping hole (56), the mounting rod (57) protrudes from below the clamping hole (56), and a bearing device (58) is provided on the outer surface of the protruding portion, and a force applying device (10) is movably mounted inside the rotating drum (51).

4. A concrete bonding strength detection device according to claim 3, characterized in that: The guide device (54) comprises a guide plate (541), a guide inclined groove (542) is provided on the inner side of the guide plate (541), the guide inclined groove (542) cooperates with the force applying device (10), and limiting plates (543) are provided on both sides and the bottom of the guide plate (541); The guide plate (541) is installed inside the first installation groove (53), and after installation, the limiting plate (543) is engaged with the first installation groove (53) in a matching manner.

5. A concrete bonding strength detection device according to claim 4, characterized in that: The bearing device (58) comprises a bearing plate (581), a fixing hole (582) is provided at a position near the inner side of the top of the bearing plate (581), the fixing hole (582) is sleeved and matched with the bottom of the mounting rod (57), a bearing hole (583) is provided at the top of the bearing plate (581), a bearing sleeve (584) is placed inside the bearing hole (583), a bonding concrete block (585) is provided inside the bearing sleeve (584), and the bottom of the bonding concrete block (585) is bonded to the bonding seat (7); In the initial state, the axis of the bearing sleeve (584) and the axis of the second mounting groove (6) are located on the same center line.

6. A concrete bonding strength detection device according to claim 5, characterized in that: The force-applying device (10) comprises a top seat (101), a force-applying protrusion (102) is arranged on the outer surface of the top seat (101) near the top, the force-applying protrusion (102) cooperates with the guide inclined groove (542), a lower pressure seat (103) is fixedly installed on the bottom of the top seat (101), a pressure sensor (104) is movably sleeved on the inner cavity of the lower pressure seat (103) near the bottom, a force-applying spring (105) is clamped on the top of the pressure sensor (104), a gasket is arranged between the pressure sensor (104) and the force-applying spring (105), a lower pressure rod (106) is fixedly installed on the bottom of the outer surface of the force-applying protrusion (102), and the bottom of the lower pressure rod (106) is fixedly connected to the stroke plate (81).

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