Cylindrical solidified soil sample preparation mold

Abstract

The utility model discloses a cylindrical solidified soil sample preparation mould, include: first mould, second mould and locking assembly, the middle part can enclose cylindrical mould cavity after the butt joint of first mould, second mould, the mutual matching of second magnetic block on first mould and first magnetic block on second mould makes first mould and second mould when butt joint are subjected to magnetic attraction force, locking assembly has support sleeve, support rod and first lock block, the middle part is fixed on first mould in support sleeve, one end can be inserted in the circular groove, and support rod eccentric rotation is connected in support sleeve, and one end is located outside support sleeve and is equipped with first lock block, when support rod rotates, the circumferential surface of first lock block can extrude the inner wall of circular groove, the utility model discloses simple structure and convenient operation realize the quick locking of first mould and second mould and fix, and the convenient dismounting can reduce longitudinal joint and reduce the risk of fixed soil slurry from the leakage of joint.

Description

Technical Field

[0001] This utility model relates to experimental mold technology, belonging to the field of geotechnical engineering testing, and specifically relates to a mold for preparing columnar solidified soil samples. Background Technology

[0002] In geotechnical engineering, road engineering and other fields, solidified soil is an important soil improvement material, and its mechanical property testing is crucial. Cylindrical specimens are commonly used standard specimens for determining the unconfined compressive strength, shear strength and other mechanical properties of solidified soil. At present, the laboratory preparation of such cylindrical specimens mostly uses the traditional three-lobed metal mold. This mold usually consists of three arc-shaped side plates, one or two ring clamps and a base plate. That is, the three arc-shaped side plates are installed on the base plate and fixedly connected by multiple ring clamps to complete the assembly of the specimen mold. However, the traditional method of preparing solidified soil specimens using molds has the following drawbacks: 1. The mold has three longitudinal joints. During filling, compaction, or vibration compaction, the solidified soil slurry with high water content is prone to seeping out from the joints, which not only pollutes the environment but also causes specimen size distortion and uneven density, seriously affecting the accuracy of test data; 2. The roundness and overall rigidity of the mold depend on the tightening force of the clamps and the rigidity of the side plates themselves. After long-term use, the clamps are prone to loosening and deformation, and the joints of the side plates are prone to wear, resulting in poor roundness and verticality of the assembled mold, which in turn affects the quality of specimen molding; 3. During assembly, the three side plates need to be manually aligned and the clamps tightened. After demolding, the residual soil at multiple joints needs to be carefully cleaned. The operation process is cumbersome and inefficient, making it difficult to meet the needs of large-scale, high-efficiency sample preparation. Utility Model Content

[0003] The purpose of this invention is to provide a cylindrical solidified soil sample preparation mold with a simple structure and convenient operation. It enables the first mold and the second mold to be quickly locked and fixed, and is easy to disassemble and assemble. It can reduce longitudinal joints and reduce the risk of leakage of the solidified soil slurry from the joints.

[0004] To achieve the above objectives, this cylindrical solidified soil sample preparation mold includes: The first mold and the second mold, when joined together, can form a cylindrical mold cavity in the middle, and the lower end of the mold cavity is closed by the base; The first mold is provided with a first magnetic block, and the second mold is provided with a second magnetic block and a circular groove; the second magnetic block and the first magnetic block match each other so that the first mold and the second mold are attracted by magnetic attraction when they are docked; The locking assembly, corresponding to the circular groove, has a support sleeve, a support rod, and a first locking block; The middle part of the support sleeve is fixed on the first mold, and one end can be inserted into the circular groove. The support rod is eccentrically rotatably connected to the support sleeve, with one end located on the outside of the support sleeve and provided with a first locking block, and the other end extending outward. When the support rod rotates, the circumferential side of the first locking block can press against the inner wall of the circular groove.

[0005] In some examples of this utility model, the circular groove is provided with an inner ring; The locking assembly also includes a second locking block mounted on the support rod and capable of being located within the inner ring; When the support rod rotates, the axial surface of the second locking block can press against the inner ring sidewall, causing the second mold to be subjected to a force toward the first mold.

[0006] In some examples of this utility model, the axial surface of the second locking block facing the support sleeve is provided with a helical surface; As the support rod rotates and locks in the same direction, the thickness of the spiral surface gradually increases. The second locking block is staggered from the first locking block by a certain angle, so that when the support rod is rotated and locked, the second locking block can exert a squeezing effect before the first locking block.

[0007] In some examples of this utility model, the periphery of the first locking block is an arc-shaped surface, which contacts the inner wall of the circular groove.

[0008] In some examples of this utility model, the mating surfaces of the first mold and the second mold are both provided with grooves. The first magnetic block is located in the corresponding groove, and its end face does not exceed the mating surface of the first mold. The second magnetic block is located in the corresponding groove, and its end face does not exceed the mating surface of the second mold.

[0009] In some examples of this utility model, there are multiple first magnetic blocks and second magnetic blocks, which are arranged in an array with the axis of the mold cavity as the center; The circular grooves and locking components are multiple and arranged in an array with the axis of the mold cavity as the center.

[0010] In some examples of this utility model, the upper end of the base is provided with a blind hole that is consistent with the first mold and the second mold after docking.

[0011] Compared with existing technologies, this cylindrical solidified soil sample preparation mold uses a first mold and a second mold to dock, which can reduce longitudinal joints and reduce the risk of leakage of the soil slurry from the joints. The first mold and the second mold are positioned by inserting a support sleeve into a circular groove. The first magnetic block and the second magnetic block match each other to achieve the fit between the first mold and the second mold at the docking position. The rotation of the support rod causes the first locking block to squeeze against the inner wall of the circular groove to quickly lock and fix the first mold and the second mold. The mold is easy to operate as a whole. While ensuring the roundness and overall rigidity of the docking, it reduces the deformation caused by the traditional clamp method, which affects the sample forming quality.

[0012] Because a second locking block with a helical surface is provided on the end side of the support rod, the thickness of the helical surface gradually increases along the locking direction of the support rod rotation. When the support rod rotates, the second locking block first squeezes against the inner ring, so that the second mold can withstand a large axial locking force. Then the first locking block contacts the circular groove to lock. Therefore, the operation is simple and the locking and positioning effect between the first mold and the second mold is enhanced. Attached Figure Description

[0013] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is an overall exploded view of the present invention; Figure 3 This is a schematic diagram of the locking component in this utility model; Figure 4 This is a schematic diagram of the first mold in this utility model; Figure 5 This is a schematic diagram of the second mold in this utility model; Figure 6 This is a schematic diagram of the assembly of the locking component with the second locking block in this utility model; Figure 7 This is a schematic diagram of a locking assembly with a second locking block in this utility model; Figure 8 This is a front view of the locking assembly when the support rod rotates in this utility model; In the diagram: 10. First mold; 11. First magnetic block; 20. Second mold; 21. Circular groove; 211. Inner ring; 22. Second magnetic block; 30. Base; 40. Locking assembly; 41. Support sleeve; 42. Support rod; 43. First locking block; 44. Second locking block; 441. Helical surface. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0015] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0016] like Figures 1 to 5 As shown, the mold for preparing this cylindrical solidified soil sample includes: The first mold 10 and the second mold 20, after being joined together, can form a cylindrical mold cavity in the middle, and the lower end of the mold cavity is closed by the base 30. The first mold 10 is provided with a first magnetic block 11, and the second mold 20 is provided with a second magnetic block 22 and at least two circular grooves 21; the second magnetic block 22 and the first magnetic block 11 are matched with each other so that the first mold 10 and the second mold 20 are magnetically attracted when they are docked. Each locking assembly 40, corresponding to the circular groove 21, has a support sleeve 41, a support rod 42, and a first locking block 43. The middle part of the support sleeve 41 is fixed on the first mold 10, and one end can be inserted into the circular groove 21. The support rod 42 is eccentrically rotatably connected to the support sleeve 41, one end is located outside the support sleeve 41 and is provided with a first locking block 43, and the other end extends outward. When the support rod 42 rotates, the peripheral side of the first locking block 43 can press against the inner wall of the circular groove 21. Specifically, the middle part of the first mold 10 and the second mold 20 are both arc-shaped structures, and the two sides are integrally arranged fixed plates. The arc-shaped structure in the middle is connected to form a cylindrical mold cavity. The fixed plates on both sides are used for docking and locking. That is, the circular groove 21 and the locking component 40 are both located on the fixed plate. The N pole of the first magnetic block 11 on the first mold 10 is located on the mating surface, and the S pole of the second magnetic block 22 on the second mold 20 is located on the mating surface, so as to achieve mutual attraction between the first mold 10 and the second mold 20 at the mating surface. The circular groove 21 corresponds to the locking component 40, meaning that the number and position are consistent to ensure that the support sleeve 41 is inserted into the circular groove 21; preferably, the locking component 40 is located at the four corners of the first mold 10; the support sleeve 41 can be fixedly connected to the first mold 10 by bolts or welding, and the first locking block 43 is connected to the end of the eccentrically arranged support rod 42, making the whole structure a cam-like structure. One end of the support rod 42 extends outward and is provided with a handle for easy operation by personnel; When this columnar solidified soil sample preparation mold is first used, a release agent can be evenly applied to the inner wall of the middle part of the first mold 10 and the second mold 20 and the base 30. The support rod 42 is rotated at a certain angle so that the maximum outline of the first locking block 43 is within the outer diameter range of the support sleeve 41. When the first mold 10 and the second mold 20 are brought close to each other, under the interaction of the first magnetic block 11 and the second magnetic block 22, the first mold 10 and the second mold 20 can attract each other at the mating surface and be aligned to the approximate position. At this time, the support sleeve 41 in the locking assembly 40 can be naturally and accurately inserted into the circular groove 21, completing the precise positioning of the first mold 10 and the second mold 20 in the horizontal and vertical directions. Rotate the support rod 42 in a specific direction, such as 90°, and the maximum outline of the first locking block 43 gradually exceeds the outer diameter of the support sleeve 41, squeezing the inner wall of the circular groove 21 to generate a large locking force, so that the first mold 10 and the second mold 20 are tightly pressed together to form a complete cylindrical mold cavity. Place the first mold 10 and the second mold 20, which have been connected, on the base 30 and assemble them completely. Fill the assembled mold with the prepared solidified soil mixture in batches and compact it using a vibrator or by placing it on a vibrating table. After the specimen has been cured to the strength required for demolding, first remove the mold as a whole from the base 30, then rotate the support rod 42 in the opposite direction to release the locking force of the first locking block 43. Then, use your hand or a simple tool to apply a separation force between the first mold 10 and the second mold 20 to separate them and remove the formed cylindrical solidified soil specimen. Clean all parts of the mold after use for future use. In this example, the first mold 10 and the second mold 20 are connected, which can reduce the longitudinal joint and reduce the risk of leakage of the fixing soil slurry from the joint. The first mold 10 and the second mold 20 are positioned by inserting the support sleeve 41 into the circular groove 21. The first magnetic block 11 and the second magnetic block 22 match each other to achieve the fit of the first mold 10 and the second mold 20 at the docking position. The rotation of the support rod 42 causes the first locking block 43 to press against the inner wall of the circular groove 21 to achieve quick locking and fixing of the first mold 10 and the second mold 20. The mold is easy to operate as a whole. While ensuring the roundness and overall rigidity of the docking, it reduces the deformation caused by the traditional clamp and reduces the impact on the sample molding quality.

[0017] In some examples of this utility model, such as Figure 3 As shown, the periphery of the first locking block 43 is an arc-shaped surface, which contacts the inner wall of the circular groove 21. After the support rod 42 rotates, the arc-shaped surface of the first locking block 43 can smoothly press and contact the inner wall of the circular groove 21; In some examples of this utility model, such as Figure 2 , Figure 4 , Figure 5 As shown, the end face of the first magnetic block 11 does not exceed the mating surface of the first mold 10, and the end face of the second magnetic block 22 does not exceed the mating surface of the second mold 20. Furthermore, there are multiple first magnetic blocks 11 and second magnetic blocks 22, which are arranged in an array with the axis of the mold cavity as the center. Specifically, the arrangement of multiple first magnetic blocks 11 and second magnetic blocks 22 along the axis of the cylindrical mold cavity can increase the contact and attraction surface between the first mold 10 and the second mold 20, and avoid large gaps between the molds. In particular, since the end faces of the first magnetic block 11 and the second magnetic block 22 do not exceed the mating surface, grooves can be set on the mating surface of the corresponding mold. The depth of the grooves is greater than the length of the magnetic blocks. At this time, the adjacent magnetic blocks on the mating surface attract each other in a non-contact manner, which enhances the mating effect.

[0018] Similarly, there are multiple circular grooves 21 and locking components 40, arranged in an array with the axis of the mold cavity as the center.

[0019] In some examples of this utility model, such as Figure 2 As shown, the upper end of the base 30 is provided with a blind hole that is consistent with the first mold 10 and the second mold 20 after they are docked; Specifically, the blind hole at the upper end of the base 30 is used to position and seal the corresponding mold. That is, after the first mold 10 and the second mold 20 are connected, they are inserted into the blind hole of the base 30, which effectively prevents the leakage of the solidified soil mixture from below.

[0020] In some examples of this utility model, such as Figures 6 to 8 As shown, the circular groove 21 has an inner ring 211 inside; The locking assembly 40 also includes a second locking block 44 mounted on the support rod 42 and capable of being located within the inner ring 211; When the support rod 42 rotates, the axial surface of the second locking block 44 can press against the side wall of the inner ring 211, so that the second mold 20 is subjected to a force toward the first mold 10. Specifically, the outer diameter of the inner ring 211 is larger than the outer diameter of the circular groove 21, which can prevent the second locking block 44 from being squeezed circumferentially inside the inner ring 211; The second locking block 44 can also be a semi-cylindrical structure, with its central axis aligned with that of the first locking block 43. Initially, the maximum profile of the second locking block 44 is located within the outer diameter range of the support sleeve 41 and at the inner ring 211. When the support rod 42 rotates, the maximum profile of the second locking block 44 gradually deflects. During the deflection process, the axial surface of the second locking block 44 can press against the side wall of the inner ring 211, tightly fitting the second mold 20 and the first mold 10 together. Furthermore, such as Figures 6 to 8 As shown, the second locking block 44 has a helical surface 441 on its axial surface facing the support sleeve 41; As the support rod 42 rotates and locks in the same direction, the thickness of the spiral surface 441 gradually increases. The second locking block 44 is staggered from the first locking block 43 by a certain angle, so that when the support rod 42 is rotated and locked, the second locking block 44 can exert a squeezing action before the first locking block 43. When using this cylindrical solidified soil sample preparation mold initially, such as... Figure 8 As shown, the maximum contours of the first locking block 43 and the second locking block 44 are both within the outer diameter range of the support sleeve 41, that is, the first locking block 43 and the second locking block 44 do not affect the support sleeve 41 being inserted into the circular groove 21. When the first mold 10 and the second mold 20 approach each other and dock, the support sleeve 41 is inserted into the circular groove 21, and at this time the second locking block 44 can be located in the inner ring 211. Rotating the support rod 42, the first locking block 43 and the second locking block 44 rotate synchronously and their maximum contours gradually exceed the outer diameter of the support sleeve 41. Because the second locking block 44 and the first locking block 43 are offset by a certain angle, the narrower axial spiral surface of the second locking block 44 enters the inner ring 211 first. As the thickness of the spiral surface 441 increases, it gradually squeezes the axial wall of the inner ring 211, so that the second mold 20 can withstand a large axial locking force. After the second locking block 44 is squeezed, the first locking block 43 rotates by a certain angle and squeezes the inner wall of the circular groove 21 on its circumference to generate a large locking force. Finally, the first mold 10 and the second mold 20 are tightly pressed together to form a complete cylindrical mold cavity. Place the first mold 10 and the second mold 20, which have been connected, on the base 30 and assemble them completely. Then fill the assembled mold with the prepared solidified soil mixture. After demolding, rotate the support rod 42 in the opposite direction. The first locking block 43 rotates and first disengages from the inner wall of the circular groove 21. The second locking block 44 then releases from the axial wall of the inner ring 211. The maximum outlines of the first locking block 43 and the second locking block 44 gradually lie within the outer diameter of the support sleeve 41. Finally, separate the first mold 10 and the second mold 20, take out the formed cylindrical solidified soil specimen, and clean all parts of the mold after use for future use.

[0021] The foregoing description, with reference to preferred embodiments, details an exemplary implementation of the cylindrical solidified soil sample preparation mold proposed by this utility model. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this utility model, and various combinations can be made to the various technical features and structures proposed by this utility model without exceeding the protection scope of this utility model, which is determined by the appended claims.

Claims

1. A mold for preparing cylindrical solidified soil samples, characterized in that, include: The first mold (10) and the second mold (20) can form a cylindrical mold cavity in the middle after docking, and the lower end of the mold cavity is closed by the base (30); The first mold (10) is provided with a first magnetic block (11), and the second mold (20) is provided with a second magnetic block (22) and a circular groove (21); the second magnetic block (22) and the first magnetic block (11) are matched with each other so that the first mold (10) and the second mold (20) are attracted by magnetic attraction when they are docked; The locking assembly (40), corresponding to the circular groove (21), has a support sleeve (41), a support rod (42), and a first locking block (43). The middle part of the support sleeve (41) is fixed on the first mold (10), and one end can be inserted into the circular groove (21). The support rod (42) is eccentrically rotatably connected to the support sleeve (41), one end is located outside the support sleeve (41) and is provided with a first locking block (43), and the other end extends outward. When the support rod (42) rotates, the circumferential side of the first locking block (43) can press against the inner wall of the circular groove (21).

2. The cylindrical solidified soil sample preparation mold according to claim 1, characterized in that, The circular groove (21) is provided with an inner ring (211); The locking assembly (40) also includes a second locking block (44) mounted on the support rod (42) and capable of being located within the inner ring (211). When the support rod (42) rotates, the axial surface of the second locking block (44) can press against the side wall of the inner ring (211), so that the second mold (20) is subjected to a force toward the first mold (10).

3. The cylindrical solidified soil sample preparation mold according to claim 2, characterized in that, The second locking block (44) has a helical surface (441) on its axial surface facing the support sleeve (41). As the support rod (42) rotates and locks in the same direction, the thickness of the spiral surface (441) gradually increases. The second locking block (44) is staggered from the first locking block (43) by a certain angle, so that when the support rod (42) is rotated and locked, the second locking block (44) can exert a squeezing effect before the first locking block (43).

4. The cylindrical solidified soil sample preparation mold according to any one of claims 1 to 3, characterized in that, The periphery of the first locking block (43) is an arc-shaped surface, which contacts the inner wall of the circular groove (21).

5. The cylindrical solidified soil sample preparation mold according to any one of claims 1 to 3, characterized in that, The mating surfaces of the first mold (10) and the second mold (20) are both provided with grooves. The first magnetic block (11) is located in the corresponding groove and its end face does not exceed the mating surface of the first mold (10). The second magnetic block (22) is located in the corresponding groove and its end face does not exceed the mating surface of the second mold (20).

6. The cylindrical solidified soil sample preparation mold according to claim 5, characterized in that, The first magnetic block (11) and the second magnetic block (22) are multiple and are arranged in an array with the axis of the mold cavity as the center; The circular groove (21) and locking assembly (40) are multiple and arranged in an array with the axis of the mold cavity as the center.

7. The cylindrical solidified soil sample preparation mold according to any one of claims 1 to 3, characterized in that, The upper end of the base (30) is provided with a blind hole that is consistent with the first mold (10) and the second mold (20) after docking.

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