A device for detecting the unconfined compressive strength of cement stabilized soil

Abstract

The utility model provides a cement stabilized soil non -side limit compressive strength detection device relates to building detection technical field, including base, the top rear side cooperation four groups of stand column fixed settings of base have support frame, two groups of vertical guide rod are fixedly arranged between the both sides of the bottom of support frame and base, and the same side two groups of vertical guide rod are rotatably arranged with lead screw, the middle fixed setting of support frame's top has hydraulic cylinder, and the telescopic end of hydraulic cylinder is fixedly arranged with pressure sensor through support frame, two groups of mobile seat are slidably arranged in the top both sides front end of base, the top rear end fixed setting of base has electric cylinder, the double -deck closed structure that constitutes through the outer cover and the inner cover, cooperation butt joint ring and the accurate butt joint design of lifter, can intercept the splashing broken lump in all directions in the detection material crushing process, solve the broken lump splashing safety problem that the traditional detection device causes because of no protection thoroughly, adopts detachable design simultaneously in the inner cover, is convenient for replacement maintenance, guarantees long -term protection effectiveness.

Description

Technical Field

[0001] This utility model belongs to the field of building testing technology, and more specifically, it relates to a device for testing the unconfined compressive strength of cement-stabilized soil. Background Technology

[0002] Cement-stabilized soil is a semi-rigid material formed by mixing cement, graded aggregates and a certain proportion of water, and then compacting and curing it. It combines the bonding strength of inorganic binders with the skeletal support of aggregates. Due to its strong integrity, good water stability, convenient construction and controllable cost, it is widely used in highway, railway subgrade and pavement base engineering. Its unconfined compressive strength directly determines the bearing capacity and long-term service life of the engineering structure.

[0003] Based on the above, the current testing devices mainly use hydraulic presses to directly squeeze and test materials. During the squeezing process, the materials are easily crushed and pulverized, causing problems such as splashing. They lack the function of automatically protecting against splashing during the testing process. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a device for testing the unconfined compressive strength of cement-stabilized soil. This addresses the issue that the testing devices mentioned in the background technology primarily rely on direct compression testing via a hydraulic press, which can easily crush and pulverize materials during the compression process, causing splashing and other problems. Furthermore, these devices lack the ability to automatically protect against splashing during the testing process.

[0005] The purpose and effectiveness of this utility model's unconfined compressive strength testing device for cement-stabilized soil are achieved through the following specific technical means: A device for testing the unconfined compressive strength of cement-stabilized soil includes a base. A support frame is fixedly mounted on the top rear side of the base with four sets of columns. Two sets of vertical guide rods are fixedly mounted on both sides of the bottom of the support frame between the support frame and the base. A lead screw is rotatably mounted between the two sets of vertical guide rods on the same side. A hydraulic cylinder is fixedly mounted in the middle of the top of the support frame, and a pressure sensor is fixedly mounted on the telescopic end of the hydraulic cylinder through the support frame. Two sets of movable seats are slidably mounted on the front ends of both sides of the top of the base. An electric cylinder is fixedly mounted at the rear end of the top of the base.

[0006] Furthermore, the top of the support frame is rotatably equipped with two sets of linkage shafts, and a servo motor is fixedly installed on the top of the support frame. The servo motor is connected to the two sets of linkage shafts by bevel gear transmission. Each linkage shaft is connected to the top of a set of lead screws by bevel gear transmission. Lifters are slidably installed on the outside of the two sets of vertical guide rods on the same side. The lifters are threadedly connected to the lead screws. The lifters are all L-shaped structures that turn forward, and the upper and lower sides of the front end of the lifters are rounded.

[0007] Furthermore, a mounting plate is fixedly provided at the bottom of the pressure sensor, and a fitting mold is provided outside the mounting plate; four sets of screw holes are opened on the side of the mounting plate, and four sets of through holes are opened on the side of the fitting mold. The fitting mold is fixed to the outside of the mounting plate by bolts passing through the through holes and being inserted into the screw holes of the mounting plate.

[0008] Furthermore, vertical rods are fixedly installed at both ends of the top of the movable seat, and movable seats are slidably installed on the outside of the vertical rods above the movable seats on both sides. A pressure-resistant seat is fixedly installed on the top of the movable seat; a sliding pile is fixedly installed on the front side of the bottom of the movable seat.

[0009] Furthermore, the telescopic end of the electric cylinder is fixedly provided with a sliding frame, which is slidably connected to the sliding pile.

[0010] Furthermore, the pressure-resistant seat is provided with an outer cover, which is a cylindrical structure. Two sets of outer edges are fixedly provided on the outside of the outer cover. Support piles are evenly distributed on the inner side of the outer cover. A cylindrical inner cover is fixedly provided on the inner side of the outer cover. The outer side of the inner cover is attached to the support piles, and the inner side of the inner cover is attached to the pressure-resistant seat. The height of the lifting device is consistent with the interval between the two sets of outer edges. A docking ring is fixedly provided at the bottom of the support frame. The lower edge of the outer side of the docking ring is rounded, and the docking ring can fit and dock with the outer cover.

[0011] Furthermore, two sets of support blocks are fixedly installed on the top rear side of the base. The top of the support blocks is higher than the movable base, and the front and rear sides of the top of the support blocks are rounded.

[0012] Compared with the prior art, the present invention has the following beneficial effects: With its double-layered enclosed structure consisting of an outer cover and an inner cover, combined with the precise docking design of the docking ring and the lifting device, the device can intercept flying fragments in all directions during the crushing of the tested materials, completely solving the safety problem of flying fragments caused by the lack of protection in traditional testing devices. At the same time, the inner cover adopts a detachable design, which is convenient for replacement and maintenance, and ensures long-term protective effectiveness.

[0013] The device provides stable pressure output through a hydraulic cylinder, and the pressure sensor collects data in real time, which can accurately capture the maximum pressure resistance value of the material before crushing, ensuring the accuracy and reliability of the test data. The device achieves automated docking and opening and closing of the protective structure through an electric cylinder and a servo motor, eliminating the need for manual adjustment of the protective components, simplifying the operation process and improving the testing efficiency.

[0014] The kit mold is detachably connected to the mounting plate via bolts, and the corresponding specification kit mold can be replaced according to the size of the material being tested to adapt to the testing needs in different scenarios; the movable seat achieves automatic lifting and positioning during movement through the support block, and with the guide transmission structure of the lead screw and vertical guide rod, it ensures accurate docking of the outer cover and smooth lifting, and the support block can support the movable seat, so the overall structure is stable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation state structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the working position structure of this utility model.

[0017] Figure 3 This is a utility model Figure 2 A side-view diagram of the structure.

[0018] Figure 4 This is a three-dimensional sectional view of the present invention.

[0019] Figure 5 This is a three-dimensional sectional view of the outer cover of this utility model.

[0020] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Base; 101. Support frame; 102. Vertical guide rod; 103. Lead screw; 104. Lifter; 105. Linkage shaft; 106. Servo motor; 107. Connecting ring; 2. Hydraulic cylinder; 201. Pressure sensor; 202. Mounting plate; 203. Set mold; 3. Moving seat; 301. Vertical rod; 302. Movable seat; 303. Pressure-resistant seat; 304. Sliding pile; 4. Electric cylinder; 401. Sliding frame; 5. Outer cover; 501. Outer edge; 502. Support pile; 503. Inner cover; 6. Support block. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0022] Example 1: As attached Figure 1 To be continued Figure 5 As shown: This utility model provides a device for testing the unconfined compressive strength of cement-stabilized soil, including a base 1. A support frame 101 is fixedly installed on the top rear side of the base 1 with four sets of columns. Two sets of vertical guide rods 102 are fixedly installed on both sides of the bottom of the support frame 101 and the base 1. A lead screw 103 is rotatably installed between the two sets of vertical guide rods 102 on the same side. A hydraulic cylinder 2 is fixedly installed in the middle of the top of the support frame 101. A pressure sensor 201 is fixedly installed through the extension end of the hydraulic cylinder 2 through the support frame 101. Two sets of movable seats 3 are slidably installed on the front ends of the top sides of the base 1. An electric cylinder 4 is fixedly installed at the rear end of the top of the base 1.

[0023] The support frame 101 has two sets of linkage shafts 105 rotatably mounted on its top, and a servo motor 106 is fixedly mounted on its top. The servo motor 106 is connected to the two sets of linkage shafts 105 by bevel gear transmission. Each linkage shaft 105 is connected to the top of a set of lead screws 103 by bevel gear transmission. Lifters 104 are slidably mounted on the outside of the two sets of vertical guide rods 102 on the same side. The lifters 104 are threadedly connected to the lead screws 103. The lifters 104 are all L-shaped structures that turn forward, and the upper and lower sides of the front end of the lifters 104 are rounded.

[0024] The pressure sensor 201 is fixedly provided with a mounting plate 202 at its bottom, and a fitting mold 203 is provided outside the mounting plate 202. The mounting plate 202 has four sets of screw holes on its side, and the fitting mold 203 has four sets of through holes on its side. The fitting mold 203 is fixed to the outside of the mounting plate 202 by bolts passing through the through holes and inserting into the screw holes of the mounting plate 202.

[0025] The movable seat 3 has vertical rods 301 fixedly installed at both ends of the top. Movable seats 302 are slidably installed on the upper vertical rods 301 of the movable seats 3 on both sides. Anti-compression seats 303 are fixedly installed on the top of the movable seats 302. Sliding piles 304 are fixedly installed on the front side of the bottom of the movable seats 302.

[0026] Among them, the telescopic end of the electric cylinder 4 is fixedly provided with a sliding frame 401, and the sliding frame 401 is slidably connected to the sliding pile 304.

[0027] The pressure-resistant seat 303 is provided with an outer cover 5, which is a cylindrical structure. Two sets of outer edges 501 are fixedly provided on the outside of the outer cover 5. Support piles 502 are evenly distributed on the inner side of the outer cover 5. A cylindrical inner cover 503 is fixedly provided on the inner side of the outer cover 5. The outer side of the inner cover 503 is attached to the support piles 502, and the inner side of the inner cover 503 is attached to the pressure-resistant seat 303. The height of the lifting device 104 is consistent with the interval between the two sets of outer edges 501. A docking ring 107 is fixedly provided at the bottom of the support frame 101. The lower edge of the outer side of the docking ring 107 is rounded, and the docking ring 107 can fit and dock with the outer cover 5.

[0028] Two sets of support blocks 6 are fixedly installed on the top rear side of the base 1. The top of the support block 6 is higher than the movable seat 3, and the front and rear sides of the top of the support block 6 are rounded.

[0029] Testing preparation and equipment docking Place the material to be tested on top of the compression seat 303, ensuring it is placed flat; The retracting electric cylinder 4 drives the movable seat 302 to move backward through the sliding frame 401 and the sliding pile 304 until the movable seat 302 is aligned with the docking ring 107; Continue moving the movable seat 302 until it contacts the support block 6 and is lifted upwards; continue moving backwards until the outer edge 501 mates with the outside of the lifter 104; Start the servo motor 106 to drive the linkage shaft 105 and the lead screw 103 to rotate, thereby raising the lifter 104 and lifting the outer cover 5. The upper end of the outer cover 5 is then connected to the outside of the docking ring 107 to form a closed enclosure structure. At this time, the support block 6 bears the load of the movable seat 302.

[0030] Pressure resistance testing and safety protection Start hydraulic cylinder 2 to drive pressure sensor 201, mounting plate 202 and mold set 203 to descend synchronously and apply pressure to the test material; The pressure sensor 201 collects data in real time to accurately detect the maximum pressure resistance that the material can withstand before crushing. If fragments fly out during the material crushing process, they will be intercepted by the inner cover 503 to prevent the fragments from flying out and causing safety hazards; The inner cover 503 is prone to deformation due to long-term impact, and can be directly disassembled and replaced to ensure the protective effect and the continuity of testing.

[0031] Subsequent cleanup and duplicate testing After the inspection is completed, clean the debris and residual material from the top surface of the movable seat 302 before proceeding to the next inspection.

[0032] Example 2: Based on Embodiment 1, proximity sensors are installed on the outside of the vertical guide rods 102 on both sides to determine the position of the lift 104 and assist it in resetting, so that when the lift 104 is reset, the outer edge 501 can move outside the lift 104.

[0033] The specific usage and function of this embodiment are as follows: In this utility model, when in use, such as Figure 1 In this state, the material to be tested is placed above the pressure seat 303, and then the electric cylinder 4 is retracted, which pulls the movable seat 302 backward through the sliding frame 401 and the sliding pile 304. The movable seat 302 moves to a position aligned with the docking ring 107. When the movable seat 302 contacts the support block 6, it is pushed upward. As it continues to move backward, the outer edge 501 moves to the outside of the lifter 104. At this time, the servo motor 106 is started to drive the linkage shaft 105 and the lead screw 103 to rotate, raising the lifter 104 and lifting the outer cover 5. The upper end of the outer cover 5 is moved to the outside of the docking ring 107 to form an enclosing structure. At this time, the support block 6 supports the movable seat 302. The hydraulic cylinder 2 is activated to lower the pressure sensor 201, mounting plate 202 and mold 203, thereby pressurizing the material. The maximum resistance of the material before crushing can be detected by the pressure sensor 201. If splashing occurs during material crushing, the splashed fragments are intercepted by the inner cover 503 to prevent them from flying out; if the inner cover 503 is deformed after being impacted for a long time, it can be disassembled and replaced. After cleaning the top surface of the movable seat 302, it can be tested again.

Claims

1. A device for testing the unconfined compressive strength of cement-stabilized soil, characterized in that, include: The base (1) has a support frame (101) fixedly installed on the top rear side in conjunction with four sets of columns; two sets of vertical guide rods (102) are fixedly installed on both sides of the bottom of the support frame (101) and the base (1), and a lead screw (103) is rotatably installed between the two sets of vertical guide rods (102) on the same side; a hydraulic cylinder (2) is fixedly installed in the middle of the top of the support frame (101), and a pressure sensor (201) is fixedly installed through the extension end of the hydraulic cylinder (2) through the support frame (101); two sets of movable seats (3) are slidably installed on the front ends of the top two sides of the base (1); and an electric cylinder (4) is fixedly installed at the rear end of the top of the base (1).

2. The unconfined compressive strength testing device for cement-stabilized soil as described in claim 1, characterized in that: The support frame (101) has two sets of linkage shafts (105) rotatably mounted on its top. A servo motor (106) is fixedly mounted on the top of the support frame (101). The servo motor (106) is connected to the two sets of linkage shafts (105) by bevel gear transmission. The linkage shafts (105) are all connected to the top of a set of lead screws (103) by bevel gear transmission. Lifters (104) are slidably mounted on the outside of the two sets of vertical guide rods (102) on the same side. The lifters (104) are threadedly connected to the lead screws (103). The lifters (104) are all L-shaped structures that turn forward. The front end of the lifters (104) is rounded at both the top and bottom.

3. The unconfined compressive strength testing device for cement-stabilized soil as described in claim 1, characterized in that: The pressure sensor (201) is fixedly provided with a mounting plate (202) at the bottom, and a fitting mold (203) is provided outside the mounting plate (202); four sets of screw holes are opened on the side of the mounting plate (202), and four sets of through holes are opened on the side of the fitting mold (203). The fitting mold (203) is fixed outside the mounting plate (202) by bolts passing through the through holes and inserting into the screw holes of the mounting plate (202).

4. The unconfined compressive strength testing device for cement-stabilized soil as described in claim 2, characterized in that: The top two ends of the movable seat (3) are fixedly provided with vertical rods (301), and movable seats (302) are slidably provided on the outside of the vertical rods (301) above the movable seats (3) on both sides. The top of the movable seats (302) is fixedly provided with a pressure-resistant seat (303); and a sliding pile (304) is fixedly provided on the front side of the bottom of the movable seats (302).

5. The unconfined compressive strength testing device for cement-stabilized soil as described in claim 4, characterized in that: The telescopic end of the electric cylinder (4) is fixedly provided with a sliding frame (401), and the sliding frame (401) is slidably connected to the sliding pile (304).

6. The unconfined compressive strength testing device for cement-stabilized soil as described in claim 4, characterized in that: The pressure-resistant seat (303) is provided with an outer cover (5), which is a cylindrical structure. Two sets of outer edges (501) are fixedly provided on the outside of the outer cover (5). Support piles (502) are distributed at equal intervals on the inner side of the outer cover (5). A cylindrical inner cover (503) is fixedly provided on the inner side of the outer cover (5). The outer side of the inner cover (503) is attached to the support piles (502), and the inner side of the inner cover (503) is attached to the pressure-resistant seat (303). The height of the lifting device (104) is consistent with the interval between the two sets of outer edges (501). A docking ring (107) is fixedly provided at the bottom of the support frame (101). The lower edge of the outer side of the docking ring (107) is rounded. The docking ring (107) can fit and dock with the outer cover (5).

7. The unconfined compressive strength testing device for cement-stabilized soil as described in claim 1, characterized in that: Two sets of support blocks (6) are fixedly installed on the top rear side of the base (1). The top of the support block (6) is higher than the movable seat (3). The front and rear sides of the top of the support block (6) are rounded.

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