A concrete test block strength testing device based on pressure method

Abstract

The present invention discloses a concrete test block strength testing device based on a pressure method, which relates to the technical field of concrete strength testing. The device comprises a mounting frame, on which a power element is provided; a threaded member, threadedly connected to the mounting frame, on which a ball joint is provided; a pressure plate, provided on the ball joint, used to squeeze the test block, a support ring fixed to the pressure plate, an adjustment member slidably connected to the lower part of the pressure plate, a spring fixed between the adjustment member and the pressure plate, the adjustment member being used to contact the middle part of the test block and drive the pressure plate to swing to a state parallel to the adjacent side of the test block; a top plate, limitedly slidably connected to the mounting frame, the top plate being located below the pressure plate. The present invention avoids squeezing caused by contact between the pressure plate and the test block due to the contact between the adjustment member and the test block, thereby ensuring the integrity and uniformity of the test block and the accuracy of the test data.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete strength detection, and in particular to a concrete test block strength detection device based on a pressure method. Background Art

[0002] Concrete test block strength testing is a very critical link in construction. It is of great significance to ensure the quality, safety and durability of the project. It includes compressive strength testing, tensile strength testing and shear strength testing. Among them, compressive strength testing is usually carried out on a compression testing machine. During the compressive strength testing process, the test block needs to be placed on the top plate of the compression testing machine, and then the pressure plate of the compression testing machine is moved so that the lower side of the pressure plate contacts the pressure-bearing surface of the test block (that is, the upper side of the test block). In this process, due to the error of the test block mold and the damage of the test block during curing or transportation, the concrete test block is not a complete cube. At the same time, since the pressure plate of the compression testing machine and the testing machine body are in a spherical joint state (the inside of the test block is not uniform, and the deformation of different parts of the test block is different during the test, the spherical joint is used to ensure that the pressure plate can always keep in contact with the pressure-bearing surface of the test block), that is, the lower side of the pressure plate is not parallel to the upper side of the test block at the beginning. In the process of the pressure plate moving downward, the pressure plate first contacts the corners on the upper part of the test block, and the corners push the pressure plate to swing until the pressure plate and the test block are in contact. In the process of the corners of the test block pushing the pressure plate to swing, the corners of the test block are squeezed and easily broken, causing the shape of the test block to change, destroying the integrity and unity of the test block during the test, and increasing the error of the test result. Summary of the Invention

[0003] The present invention provides a concrete test block strength testing device based on a pressure method, so as to overcome the disadvantage that when a pressure plate of an existing compression testing machine contacts the test block, the test block edges and corners are damaged, thereby affecting the detection accuracy.

[0004] A concrete test block strength testing device based on a pressure method comprises a mounting frame on which a power element is provided;

[0005] a threaded member, threadedly connected to the mounting bracket, wherein the threaded member is provided with a ball joint;

[0006] A pressure plate is provided on the ball joint, the pressure plate is used to squeeze the test block, a support ring is fixedly connected to the pressure plate, an adjusting member is slidably connected to the lower part of the pressure plate, a spring is fixedly connected between the adjusting member and the pressure plate, the adjusting member is used to contact the middle part of the test block and drive the pressure plate to swing to a state parallel to the adjacent side of the test block;

[0007] A top plate is connected to the mounting frame in a limited sliding manner, the top plate is located below the pressing plate and is used to support the test block;

[0008] A pushing plate is provided on the mounting frame and is used to move under the drive of the power element on the mounting frame and push the top plate upward;

[0009] The detection component is arranged on the adjusting member and is used to detect the fitting state between the adjusting member and the test block.

[0010] Furthermore, the detection assembly includes: a plurality of limit posts slidably connected to the adjusting member, a spring fixedly connected between the limit posts and the adjusting member, a limit slot and an unlocking slot provided on the limit posts, the limit slot being located above an adjacent unlocking slot, and the limit slot being communicated with the adjacent unlocking slot;

[0011] A plurality of limiting members are slidably connected in the adjusting member, the limiting groove and the unlocking groove are squeezed and matched with the adjacent limiting members, and a plurality of locking grooves are provided in the pressure plate, and the locking grooves are limitedly matched with the adjacent limiting members.

[0012] Furthermore, the support ring is slidably connected to an annularly distributed ball bearing, which contacts the ball joint to ensure the stability of the support ring while reducing the friction force exerted on the support ring and the pressure plate when rotating relative to the threaded member.

[0013] Furthermore, the annularly distributed balls are all located above the center of the ball joint, which facilitates initial adjustment of the position of the pressure plate and suppresses position changes of the pressure plate when squeezing the test block.

[0014] Furthermore, the support ring is fixed with an elastic member, and the threaded member is provided with a step portion near the elastic member, and the step portion is squeezed and fitted with the elastic member for coarsely adjusting the position of the pressure plate through the support ring.

[0015] Furthermore, there is a gap between the elastic member and the step portion, so as to prevent subsequent fine adjustment of the pressing plate from being affected after the coarse adjustment of the pressing plate.

[0016] Furthermore, a liquid storage bag is fixedly connected to the ball joint, a flow channel connected to the liquid storage bag is opened in the threaded part, liquid is stored in the flow channel, a plurality of elastic strips are fixedly connected to the pressure plate, the elastic strips are squeezed and matched with the liquid storage bag, and a schematic column is sealed and slidably connected in the flow channel for displaying the change in the amount of liquid in the flow channel.

[0017] Furthermore, the inner diameter of the liquid storage capsule is larger than the diameter of the flow channel, so as to amplify the moving distance of the schematic column.

[0018] Furthermore, the side of the liquid storage bag contacts the ball joint, and multiple elastic strips are embedded in the ball joint to ensure that the volume of the liquid storage bag shrinks when squeezed by the elastic strips, thereby reducing the volume of the liquid storage bag "overflowing" from between adjacent elastic strips.

[0019] Furthermore, it also includes an adjustment plate, which is limitedly slidably connected to the top plate, and a spring is fixed between the two, and the adjustment plate is used to provide support for the test block;

[0020] A limiting ring is fixed to the mounting frame, the limiting ring is matched with the top plate in a limiting manner, and the adjustment plate is located above the pushing plate.

[0021] Compared with the prior art, the present invention has the following advantages: the present invention avoids the contact and extrusion of the pressing plate and the sharp corners of the test block by the adjusting piece, thereby ensuring the integrity and uniformity of the test block and the accuracy of the test data; the position of the pressing plate is pre-adjusted by the elastic piece to ensure that the adjusting piece can contact the test block before the pressing plate, further preventing the contact of the pressing plate and the sharp corners of the test block, protecting the sharp corners of the test block, and ensuring the integrity and uniformity of the test block; the adjusting plate is squeezed by the test block and then moves downward, so that the top plate and the adjusting plate cooperate to form a pit, which is convenient for the operator to position the test block, saves the time required for positioning, and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 Schematic diagram of the three-dimensional structure of the threaded member, the pressing plate and the support ring of the present invention;

[0024] Figure 3 Schematic diagram of the three-dimensional structure of the pressing plate, support ring and adjusting member of the present invention;

[0025] Figure 4 A sectional view of the three-dimensional structure of the pressing plate, the supporting ring and the adjusting member of the present invention;

[0026] Figure 5 A sectional view of the three-dimensional structure of the threaded member, the pressing plate and the adjusting member of the present invention;

[0027] Figure 6 Schematic diagram of the three-dimensional structure of the threaded member and the schematic column of the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the mounting frame, top plate and adjustment plate of the present invention;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the top plate and the adjustment plate of the present invention.

[0030] The markings of the components in the accompanying drawings are as follows: 1-mounting frame, 2-threaded part, 201-ball joint, 3-pressure plate, 4-support ring, 401-ball, 5-adjusting part, 6-top plate, 7-push plate, 8-limiting column, 801-limiting groove, 802-unlocking groove, 9-limiting part, 901-locking groove, 10-elastic part, 101-step part, 11-liquid storage capsule, 111-flow channel, 12-elastic strip, 13-schematic column, 14-adjustment plate, 141-limiting ring. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] A concrete test block strength testing device based on the pressure method, please refer to Figure 1-Figure 4 , including a mounting frame 1, on which a power element is provided; a threaded member 2, threadedly connected to the mounting frame 1, and a ball joint 201 is provided on the threaded member 2; a pressure plate 3, arranged on the ball joint 201, the pressure plate 3 is used to squeeze the test block, and a support ring 4 is fixedly connected to the pressure plate 3, and an adjusting member 5 is slidably connected to the lower part of the pressure plate 3, and a spring is fixedly connected between the adjusting member 5 and the pressure plate 3, and the adjusting member 5 is used to contact the middle of the test block and drive the pressure plate 3 to swing to a state parallel to the adjacent side of the test block; a top plate 6, limitedly slidably connected to the mounting frame 1, and the top plate 6 is located below the pressure plate 3 and is used to support the test block; a pushing plate 7, arranged on the mounting frame 1, for moving and pushing the top plate 6 upward under the drive of the power element on the mounting frame 1; a detection component, arranged on the adjusting member 5, for detecting the fitting state of the adjusting member 5 and the test block.

[0033] In the above scheme, it is intended to solve the problem that when the compressive strength test of the concrete test block is carried out, the corners of the test block are damaged during the fitting process of the pressure plate 3 and the test block, and the existing testing steps are cumbersome, so as to improve the accuracy of the test results and the testing efficiency; the above power element can be a hydraulic telescopic rod, an electric push rod or other power elements with the same function; the upper part of the threaded member 2 can be splined to a handwheel, and the upper side of the threaded member 2 can be detachably mounted with a cover plate by bolts, and the cover plate is used to fix the handwheel on the threaded member 2, which is convenient for the operator to operate the threaded member The push plate 7, the top plate 6 and the pressure plate 3 can be installed with pressure sensors for detecting the extrusion force applied to the test block through the deformation of the push plate 7, the top plate 6 and the pressure plate 3; the adjusting member 5 contacts the middle of the pressure-bearing surface of the test block and drives the pressure plate 3 to swing to a state parallel to the adjacent side of the test block, thereby eliminating the extrusion between the pressure plate 3 and the corners of the test block, protecting the corners of the test block, and enabling the pressure plate 3 to be straightened without contacting the corners of the test block, thereby reducing the probability of damage to the corners of the test block and ensuring the integrity and unity of the test block.

[0034] See also Figure 3-Figure 5 The detection component includes: a plurality of limit columns 8, which are slidably connected to the adjusting member 5, and a spring is fixed between the limit column 8 and the adjusting member 5. A limit groove 801 and an unlocking groove 802 are provided on the limit column 8, and the limit groove 801 is located on the upper side of the adjacent unlocking groove 802, and the limit groove 801 is communicated with the adjacent unlocking groove 802; a plurality of limit members 9, which are slidably connected to the adjusting member 5, and the limit groove 801 and the unlocking groove 802 are squeezed and matched with the adjacent limit member 9, and a plurality of locking grooves 901 are provided in the pressure plate 3, and the locking groove 901 is limited and matched with the adjacent limit member 9.

[0035] In the above scheme, the aim is to ensure that the adjusting piece 5 can be retracted into the pressure plate 3 only after it is in contact with the pressure-bearing surface of the test block; a number of limiting columns 8 can be evenly distributed in a ring to detect the contact between the lower side of the adjusting piece 5 and the test block in the circumferential direction; the limiting piece 9 can be a steel column or a column with an arc-shaped end face, which can complete the limitation of the adjusting piece 5; in the vertical direction, the minimum distance between the upper side of the limiting column 8 and the adjusting piece 5 can be equal to the minimum distance between the lower side of the limiting column 8 and the adjusting piece 5 5, is used for that after the limiting post 8 is retracted into the adjusting piece 5, the lower side of the limiting post 8 is coplanar with the lower side of the adjusting piece 5, so as to provide uniform extrusion pressure to all parts of the pressure-bearing surface of the test block through the pressure plate 3, the adjusting piece 5 and all the limiting posts 8; after all the limiting posts 8 are in contact with the test block and the limiting posts 8 are squeezed and compressed back into the adjusting piece 5, the limiting of the adjusting piece 5 by the limiting piece 9 will be completely released, and the adjusting piece 5 will be retracted into the pressure plate 3 under the extrusion of the test block.

[0036] See also Figure 4The support ring 4 is slidably connected to an annularly distributed ball 401, which contacts the ball joint 201 to ensure the stability of the support ring 4 while reducing the friction force exerted on the support ring 4 and the pressure plate 3 when rotating relative to the screw member 2.

[0037] The annularly distributed balls 401 are all located above the center of the ball joint 201, which facilitates initial adjustment of the position of the pressing plate 3 and suppresses position changes of the pressing plate 3 when the test block is squeezed.

[0038] In the above scheme, the purpose is to solve the problem that when the position of the pressure plate 3 is adjusted by the adjusting piece 5, the friction between the pressure plate 3 and the support ring 4 and the ball joint 201 is large, which causes the adjusting piece 5 to exert a large extrusion force on the test block, which is easy to cause damage to the test block; a mechanism for continuously adding lubricant to the ball 401 can be provided in the support ring 4 to maintain good lubrication between the ball 401 and the support ring 4; by providing the ball 401, the sliding between the support ring 4 and the ball joint 201 is changed to rolling, thereby reducing the friction between the two, thereby reducing the extrusion force of the adjusting piece 5 on the test block, and facilitating the adjustment of the position of the pressure plate 3 by the adjusting piece 5.

[0039] See also Figure 3 and Figure 4 An elastic member 10 is fixed to the support ring 4, and a step portion 101 is provided on the threaded member 2 near the elastic member 10. The step portion 101 is squeezed and fitted with the elastic member 10 to coarsely adjust the position of the pressure plate 3 through the support ring 4.

[0040] There is a gap between the elastic member 10 and the step portion 101 so as to prevent subsequent fine adjustment of the pressing plate 3 from being affected after the pressing plate 3 is roughly adjusted.

[0041] The above solution aims to solve the problem that when the offset of the pressing plate 3 is too large, it is difficult to avoid the pressing plate 3 from contacting the corners of the test block. By deforming the elastic member 10, the initial angle of the pressing plate 3 relative to the threaded member 2 is maintained within a range, ensuring that the height of the lowest point of the adjusting member 5 is lower than that of the lowest point of the pressing plate 3, so that the adjusting member 5 contacts the test block first.

[0042] See also Figure 5 and Figure 6 A liquid storage capsule 11 is fixedly connected to the ball joint 201, a flow channel 111 connected to the liquid storage capsule 11 is opened in the threaded part 2, liquid is stored in the flow channel 111, a plurality of elastic strips 12 are fixedly connected to the pressure plate 3, the elastic strips 12 are squeezed and matched with the liquid storage capsule 11, and a schematic column 13 is sealed and slidably connected in the flow channel 111 for displaying the change in the amount of liquid in the flow channel 111.

[0043] The inner diameter of the liquid storage capsule 11 is larger than the diameter of the flow channel 111 , so as to amplify the moving distance of the schematic column 13 .

[0044] The side of the liquid reservoir 11 contacts the ball joint 201, and multiple elastic strips 12 are embedded in the ball joint 201. Under the squeezing effect of the multiple elastic strips 12, the liquid reservoir 11 is not a standard cylinder at the beginning. This is to prevent the liquid reservoir 11 from "overflowing" from the gap between two adjacent elastic strips 12 when the elastic strips 12 squeeze the liquid reservoir 11. The volume of liquid squeezed into the flow channel 111 when the liquid reservoir 11 deforms is guaranteed, thereby ensuring the movement distance of the schematic column 13.

[0045] Before the compression test is carried out on the test block, the operator needs to use tools to detect the flatness of the test block surface and the angle between the two adjacent side surfaces of the test block to ensure that the top plate 6, the upper side of the test block and the lower side of the pressure plate 3 are roughly in a parallel state during the compression test to ensure that the test block can be subjected to uniform extrusion pressure at all locations. In the above scheme, it is intended to solve the problem that the above-mentioned detection process of the angle between the adjacent side surfaces on the test block is too cumbersome and is not conducive to improving the detection efficiency, so as to optimize the detection steps of the test block before the existing compression test, save the test operation steps, and improve the detection efficiency; a scale can be set on the schematic column 13 to clearly indicate the length of the threaded member 2 probed by the schematic column 13; the angle of the pressure plate 3 relative to the horizontal plane can be known through the movement distance of the schematic column 13, eliminating the step of manual detection and improving the detection efficiency.

[0046] The specific implementation method is as follows: When conducting a compressive strength test of a concrete test block (hereinafter referred to as a compressive test), the operator places the prepared concrete test block (hereinafter referred to as a test block) on the top plate 6, and then rotates the threaded member 2 to drive the pressure plate 3, the support ring 4 and the parts thereon to move downward. A corner of the lower side of the adjusting member 5 contacts the upper side of the test block and stops moving. As the pressure plate 3 moves downward, the adjusting member 5 swings around the position where it contacts the test block and slides along the upper side of the test block. At the same time, the adjusting member 5 drives the pressure plate 3 to swing until the lower side of the adjusting member 5 is parallel to and fits the upper side of the test block. The adjusting member 5 stops swinging. In this way, the position of the pressure plate 3 is adjusted through the contact between the adjusting member 5 and the test block, thereby preventing the pressure plate 3 from damaging the corners of the test block.

[0047] As the pressure plate 3 slides along the ball joint 201, the angle between the pressure plate 3 and the axis of the threaded member 2 gradually increases. As the pressure plate 3 swings, the pressure plate 3 drives all the elastic strips 12 to move. The elastic strips 12 squeeze the liquid storage capsule 11, so that the liquid in the liquid storage capsule 11 enters the flow channel 111, and pushes the schematic column 13 to move upward, so that the schematic column 13 protrudes from the upper side of the threaded member 2. Until the pressure plate 3 stops swinging (that is, the adjusting member 5 is in contact with the test block), the elastic strips 12 no longer continue to squeeze the liquid storage capsule 11, and the schematic column 13 stops moving upward. The operator can observe the scale on the schematic column 13 to obtain the length of the schematic column 13 protruding from the threaded member 2, and can know the angle between the pressure plate 3 and the axis of the threaded member 2. If the angle is within the error range, the compression test is continued. Otherwise, the compression test is stopped and the test block is replaced. There is no need to perform additional measurements on the test block, saving detection steps.

[0048] During the swinging of the adjusting member 5, the adjusting member 5 drives the limiting posts 8 thereon to swing, and the lower sides of the plurality of limiting posts 8 successively contact the upper side surface of the test block and stop moving. During the swinging of the adjusting member 5, the limiting posts 8 successively retract into the adjusting member 5 and compress the springs adjacent to the limiting posts 8. The limiting posts 8 drive the adjacent limiting grooves 801 and the unlocking grooves 802 to move upward, so that the limiting member 9 slides along the adjacent limiting grooves 801, and finally loses contact with the adjacent limiting grooves 801 and enters the adjacent unlocking grooves 802, releasing the limiting grooves 801 from contacting the adjacent limiting grooves 801. The limiting member 9 is limited until the adjusting member 5 is fitted with the test block, and all the limiting columns 8 are retracted into the adjusting member 5. Thereafter, as the pressure plate 3 moves downward, the pressure plate 3 moves downward relative to the adjusting member 5 and compresses the spring between the adjusting member 5 and the pressure plate 3 (hereinafter referred to as the spring adjacent to the adjusting member 5). The adjusting member 5 drives all the limiting members 9 to move upward. During this process, the limiting member 9 enters the adjusting member 5 under the squeezing of the adjacent locking groove 901 and contacts the adjacent unlocking groove 802. At this time, the limiting of the adjacent limiting member 9 by the locking groove 901 is released.

[0049] After the pressing plate 3 moves downward relative to the adjusting member 5, until the lower side of the adjusting member 5 is coplanar with the lower side of the pressing plate 3, the lower side of the pressing plate 3 is in contact with the test block, at this time the pressing plate 3 stops moving downward, and then the operator starts the power element on the mounting frame 1, and the power element drives the pushing plate 7 to move upward, and the pushing plate 7 pushes the top plate 6 to move upward, and the top plate 6 cooperates with the pressing plate 3 to extrude the test block, and gradually increases the extrusion force of the top plate 6 on the test block. At the same time, the pressure sensor always detects and records the value of the reaction force of the top plate 6 exerted on the pushing plate 7 until the test block is broken. At this time, the limit value recorded by the pressure sensor is recorded, and the power element on the mounting frame 1 is controlled to contract, and the power element drives the pushing plate 7 to move downward, and the top plate 6 moves downward with the pushing plate 7 under the test block and its own gravity until the top plate 6 and the pushing plate 7 are reset, and the power element is stopped. At this time, the operator cleans the broken test block on the top plate 6.

[0050] When the pressure plate 3 and the top plate 6 cooperate to squeeze and crush the test block, the test block is not uniformly crushed due to the different strengths in different places in the test block, that is, one side of the test block is crushed first. At this time, the reaction force of the test block on the pressure plate 3 is uneven, causing the pressure plate 3 to drive the support ring 4 to slide relative to the ball joint 201, that is, the angle between the pressure plate 3 and the axis of the screw member 2 increases, and the support ring 4 drives the elastic member 10 to move, and the distance between the elastic member 10 and the step 101 gradually decreases, and finally the step 101 contacts the elastic member 10. As the support ring 4 continues to swing, the support ring 4 squeezes the elastic member 10 to deform and accumulate force until the test block is broken. The top plate 6 drives the test block to move downward, and the pressure plate 3 and the support ring 4 swing under the resetting action of the elastic member 10, so that the angle between the pressure plate 3 and the axis of the screw member 2 is reduced, the position of the pressure plate 3 is pre-adjusted, and then the above steps are repeated to continue the compression test of the next test block.

[0051] See also Figure 7 and Figure 8 , and also includes an adjustment plate 14, which is slidingly connected to the top plate 6 in a limited manner, and a spring is fixed between the two. The adjustment plate 14 is used to provide support for the test block; a limiting ring 141 is fixed to the mounting frame 1, and the limiting ring 141 is limitedly matched with the top plate 6, and the adjustment plate 14 is located above the pushing plate 7.

[0052] The above scheme aims to solve the problem that, when conducting compression tests on test blocks, the positioning steps are cumbersome and the positioning is inaccurate due to the influence of the observation angle, so as to improve the positioning accuracy of the test blocks and thus improve the reliability of the test results. Initially, there is a distance between the push plate 7 and the adjustment plate 14, which facilitates the subsequent downward movement of the adjustment plate 14 relative to the top plate 6 to form a pit. By setting the pit, it is convenient to position the test block, improve the positioning accuracy of the test block, and thus improve the reliability of the test results.

[0053] When conducting a compression test on a test block, the operator places the test block on the top plate 6 and makes the center point of the test block and the center point of the top plate 6 lie on the same vertical line. A circle is drawn on the upper side of the existing top plate 6. The operator needs to observe to ensure that the test block is within the circle of the top plate 6 when placing the test block. During the observation, the operator needs to observe the four corners of the test block separately to see whether they are within the circle. The steps are cumbersome. At the same time, since the operator observes the four corners of the test block at different angles, it is easy for the test block to not be completely within the circle. As a result, when the test block is subsequently squeezed, the squeezing force on each part of the test block is uneven, and the detection accuracy is not high.

[0054] When conducting a compression test, the operator places the test block on the adjustment plate 14. The adjustment plate 14 moves downward under the action of the gravity of the test block and contacts the upper side of the push plate 7, compressing the spring adjacent to the adjustment plate 14, so that the upper side of the top plate 6 is higher than the upper side of the adjustment plate 14, that is, the adjustment plate 14 and the top plate 6 cooperate to form a pit. Then the operator moves the position of the test block, and finally moves the test block into the pit formed on the top plate 6, thereby completing the positioning of the test block.

[0055] After the positioning of the test block is completed, the power element is started, and the power element drives the pushing plate 7 to move upward, and the pushing plate 7 pushes the adjusting plate 14 to move upward, so that the adjusting plate 14 drives the test block to move upward until the upper side of the adjusting plate 14 is coplanar with the upper side of the top plate 6 again. At this time, the pushing plate 7 contacts the top plate 6, and the pushing plate 7 pushes the top plate 6 and the adjusting plate 14 to move upward together. The top plate 6 loses contact with the limiting ring 141, and the top plate 6 and the adjusting plate 14 cooperate with the pressing plate 3 to squeeze the test block. Afterwards, the pushing plate 7 is moved down and reset by controlling the power element, and the top plate 6 contacts the limit ring 141 again and stops moving down. At this time, the operator cleans the broken test blocks on the top plate 6 and the adjustment plate 14. As the volume of the broken test blocks on the adjustment plate 14 gradually decreases, the gravity on the adjustment plate 14 decreases. Under the action of the adjacent springs, the adjustment plate 14 moves up and resets relative to the top plate 6, so that the upper side of the top plate 6 is coplanar with the upper side of the adjustment plate 14, which is convenient for the operator to clean the broken test blocks.

[0056] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A concrete test block strength testing device based on the pressure method, characterized by: It comprises a mounting frame (1), on which a power element is arranged; A threaded member (2) is threadedly connected to the mounting frame (1), and a ball joint (201) is provided on the threaded member (2); A pressure plate (3) is provided on the ball joint (201), the pressure plate (3) is used to squeeze the test block, a support ring (4) is fixedly connected to the pressure plate (3), an adjustment member (5) is slidably connected to the lower part of the pressure plate (3), a spring is fixedly connected between the adjustment member (5) and the pressure plate (3), and the adjustment member (5) is used to contact the middle part of the test block and drive the pressure plate (3) to swing to a state parallel to the adjacent side of the test block; A top plate (6) is connected to the mounting frame (1) in a limited sliding manner, and the top plate (6) is located below the pressing plate (3) and is used to support the test block; A pushing plate (7) is provided on the mounting frame (1) and is used to move under the drive of a power element on the mounting frame (1) and to push the top plate (6) upward; A detection component, arranged on the adjusting member (5), for detecting the fitting state between the adjusting member (5) and the test block; The detection component includes: A plurality of limiting columns (8) are slidably connected in the adjusting member (5), a spring is fixedly connected between the limiting column (8) and the adjusting member (5), a limiting slot (801) and an unlocking slot (802) are provided on the limiting column (8), and the limiting slot (801) is located on the upper side of the adjacent unlocking slot (802), and the limiting slot (801) is communicated with the adjacent unlocking slot (802); A plurality of limiting members (9) are slidably connected to the adjusting member (5), the limiting grooves (801) and the unlocking grooves (802) are both squeezed and matched with the adjacent limiting members (9), and a plurality of locking grooves (901) are provided in the pressure plate (3), and the locking grooves (901) are limitedly matched with the adjacent limiting members (9); The support ring (4) is fixedly connected to an elastic member (10), and a step portion (101) is provided on the threaded member (2) near the elastic member (10), and the step portion (101) is squeeze-fitted with the elastic member (10) for coarsely adjusting the position of the pressure plate (3) through the support ring (4); There is a gap between the elastic member (10) and the step portion (101), which is used to prevent subsequent fine adjustment of the pressing plate (3) from being affected after the coarse adjustment of the pressing plate (3).

2. The concrete test block strength testing device based on the pressure method according to claim 1 is characterized by: The support ring (4) is slidably connected to an annularly distributed ball bearings (401), which are in contact with the ball joint (201) to ensure the stability of the support ring (4) while reducing the friction force exerted on the support ring (4) and the pressure plate (3) when rotating relative to the threaded member (2).

3. The concrete test block strength testing device based on the pressure method according to claim 2 is characterized by: The annularly distributed balls (401) are all located above the center of the ball joint (201), facilitating initial adjustment of the position of the pressing plate (3) and suppressing position changes of the pressing plate (3) when the test block is squeezed.

4. The concrete test block strength testing device based on the pressure method according to claim 1 is characterized by: A liquid storage capsule (11) is fixedly connected to the ball joint (201), a flow channel (111) communicating with the liquid storage capsule (11) is provided in the threaded member (2), liquid is stored in the flow channel (111), a plurality of elastic strips (12) are fixedly connected to the pressure plate (3), the elastic strips (12) are squeezed and matched with the liquid storage capsule (11), and a schematic column (13) is sealed and slidably connected in the flow channel (111) for displaying the change in the amount of liquid in the flow channel (111).

5. The concrete test block strength testing device based on the pressure method according to claim 4 is characterized by: The inner diameter of the liquid storage capsule (11) is larger than the diameter of the flow channel (111), and is used to amplify the moving distance of the schematic column (13).

6. The concrete test block strength testing device based on the pressure method according to claim 4 is characterized by: The side surface of the liquid storage capsule (11) contacts the ball joint (201), and a plurality of elastic strips (12) are embedded in the ball joint (201), so as to ensure that the volume of the liquid storage capsule (11) contracts when squeezed by the elastic strips (12), thereby reducing the volume of the liquid storage capsule (11) "overflowing" from between adjacent elastic strips (12).

7. The concrete test block strength testing device based on the pressure method according to claim 1 is characterized by: It also includes an adjustment plate (14) that is limitedly slidably connected to the top plate (6), and a spring is fixedly connected between the two. The adjustment plate (14) is used to provide support for the test block; A limiting ring (141) is fixed to the mounting frame (1), the limiting ring (141) is in position-limiting cooperation with the top plate (6), and the adjustment plate (14) is located above the pushing plate (7).

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