Solidified sludge hollow cylinder sample preparation and rotary demolding device and use method

Abstract

A solidified sludge hollow cylinder sample preparation and rotary demolding device comprises a base and an outer cylinder assembly which comprises at least two outer cylinder bodies; the inner cylinder assembly is located in the outer cylinder assembly and comprises a support and at least two inner cylinder bodies, the support is provided with a switching unit, and the switching unit acts on the inner cylinder bodies and drives the adjacent inner cylinder bodies to rotate reversely; the compaction assembly is detachably arranged above the outer cylinder assembly, and a compaction block is arranged and used for stretching into the space between the outer cylinder body and the inner cylinder body; the stirring assembly is detachably arranged above the outer cylinder assembly and comprises stirring blades and a stirring power part, and the stirring power part is used for driving the stirring blades to rotate. According to the scheme, the functions of stirring, compacting, sample preparation, demolding and the like can be achieved at the same time, the sample preparation precision and efficiency of the solidified sludge hollow cylinder are remarkably improved, and the problem of sample damage in the demolding process is solved. The invention further provides a using method of the solidified sludge hollow cylinder sample preparation and rotary demolding device.

Description

Technical Field

[0001] The present invention relates to the technical field of geotechnical engineering, and particularly relates to a device for preparing and rotating demolding a solidified silt hollow cylinder, and a method for using the device for preparing and rotating demolding a solidified silt hollow cylinder. Background Art

[0002] With the economic development of our country, the demand for land use is constantly expanding. The development of coastal silt areas is an effective way to solve the shortage of land use. However, silt has a high natural water content, a large void ratio, and a low bearing capacity, and cannot be directly used as roadbed filler. It needs to be solidified before it can be used for road engineering requirements. Revealing the development law of the dynamic characteristics of solidified silt unit under traffic load through hollow cylinder torsional shear test is one of the important ways to evaluate the suitability of solidified silt roadbed filler. However, there are the following deficiencies in the existing devices for preparing solidified silt hollow cylinder units, which seriously affect the uniformity and integrity of the specimens and the credibility of the test results: (1) Currently, the demolding of hollow cylinder specimens generally adopts the static pressure method, that is, using an external force to push the specimen out of the device. In this demolding method, during the demolding process, since the mold fits tightly with the specimen and it is difficult to separate from the specimen, a large load needs to be applied during separation. However, the strength of the specimen itself is relatively fragile, which easily causes different degrees of cracking on the side wall of the specimen, ultimately leading to the failure of specimen preparation, etc.; and during the process of pushing the specimen, the thrust is easily too large, resulting in the offset of the chassis, thus causing the deformation of the specimen, etc.

[0003] (2) Some hollow cylinder specimens are demolded by the method of disassembling multi-piece molds. However, since the multi-piece molds are not a whole, it is easy to form misalignment at the end during assembly, affecting the integrity of the specimen end, and stress concentration is likely to occur at the connection of each piece of the mold, making the stress at the connection relatively large. The connection is relatively fragile and is prone to deformation after long-term use, thus making the produced specimen incomplete, and soil will seep out between adjacent molds, which will cause a large test error.

[0004] (3) The traditional stirring device has poor stirring effect during the stirring process, seriously affecting the uniformity of the specimen. There is an urgent need to develop a device that can fully and evenly stir the soil sample.

[0005] (4) Currently, in the field of geotechnical engineering during the specimen preparation process, the stirring and solidification of the test soil sample are carried out in different devices respectively, which is cumbersome to operate and easily causes loss of the soil sample. There is an urgent need to develop an integrated device that can simultaneously carry out stirring and solidifying the specimen. Summary of the Invention

[0006] The purpose of the present invention is to provide a device for preparing and rotating demolding a solidified silt hollow cylinder, which can simultaneously realize functions such as stirring, compaction, specimen preparation, and rotating and disturbing demolding, can significantly improve the precision and efficiency of preparing a solidified silt hollow cylinder, and avoid the problem of damage to the specimen during the demolding process.

[0007] To solve the above problems, the present invention provides a device for preparing and rotating demolding of solidified sludge hollow cylinders, including a base and:

[0008] An outer cylinder assembly, including at least two outer cylinders, the outer cylinders are arranged in vertical layers and are coaxial with each other, the adjacent outer cylinders are detachably connected, and the bottom outer cylinder is detachably connected to the base;

[0009] An inner cylinder assembly, located inside the outer cylinder assembly, including a bracket and at least two inner cylinders, the bracket is arranged vertically, the inner cylinders are arranged in vertical layers and are all centered on the bracket, the adjacent inner cylinders are rotatably connected, the bracket is provided with a transfer unit, the transfer unit acts on the inner cylinder and drives the adjacent inner cylinders to rotate in opposite directions, and the bottom inner cylinder is detachably connected to the base;

[0010] A compaction assembly, detachably arranged above the outer cylinder assembly, ensuring a compaction block, the compaction block is used to extend between the outer cylinder and the inner cylinder;

[0011] A stirring assembly, detachably arranged above the outer cylinder assembly, including stirring blades and a stirring power member, the stirring blades are used to extend between the outer cylinder and the inner cylinder, and the stirring power member is used to drive the rotation of the stirring blades.

[0012] Preferably, the stirring assembly further includes a housing, a stirring motor and a limiting frame. The housing is fixedly connected with a large gear arranged horizontally. The limiting frame is rotatably arranged in the housing and is coaxial with the large gear. A plurality of gear rods that can rotate vertically are arranged on the outer peripheral side of the limiting frame. A small gear is sleeved on each gear rod, and the small gears are all meshed with the large gear. The stirring blades are connected to the bottom ends of the gear rods. The output shaft of the stirring motor is connected to the limiting frame and is used to drive the rotation of the limiting frame so that the small gears revolve around the large gear. After adopting this structure, the small gears rotate around the large gear and also rotate on their own axes. Therefore, the gear rods can rotate around the inner cylinder while rotating on their own axes under the drive of the small gears, realizing a more uniform and sufficient stirring effect of the stirring blades.

[0013] Preferably, the stirring assembly further comprises a cover plate, the cover plate is located above the outer cylinder assembly, a transfer hole is provided in the middle of the cover plate which penetrates vertically, the transfer hole is rotatably sleeved to the bracket, the bracket is provided with a fixing part which abuts against the cover plate to realize axial limitation of the cover plate; the cover plate is provided with mud retaining holes of the same number as the stirring blade, the positions of the mud retaining holes correspond to the stirring blades one by one, the shape of the mud retaining holes is the same as the cross-sectional shape of the stirring blade, and the output shaft of the stirring motor is connected to the middle of the cover plate to drive the rotation of the cover plate. When the stirring blade is pulled out from between the outer cylinder and the inner cylinder after stirring is completed, the mud retaining hole can peel off the soil sample attached to the stirring blade to reduce the loss of the soil sample.

[0014] Preferably, the stirring blade comprises multiple layers of blades stacked vertically, the blades of adjacent layers are detachably connected, and the transverse cross-section of the blade is cross-shaped, so that the height of the stirring blade can be adjusted by disassembling the blades.

[0015] Preferably, the transfer unit includes a turntable and a guide member, the number of the turntables is the same as the inner cylinder so that each inner cylinder is connected to a coaxial turntable, and the turntables can rotate relative to the bracket; the guide member is connected to the bracket, and there is a guide member between two adjacent turntables, the guide member is provided with a slider that can slide in the transverse direction, the opposite sides of the two adjacent turntables are respectively provided with side push rods facing opposite directions, and the side push rods are rotatably connected to the turntable with the axis of the turntable as the rotation axis, the slider is rotatably connected to a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are respectively rotatably connected to two side push rods on the opposite sides of the corresponding adjacent turntables, so that when the slider slides relative to the guide member, the corresponding two adjacent turntables rotate in opposite directions, thereby achieving the effect of opposite rotation directions of the adjacent inner cylinders.

[0016] Preferably, the guide member is a piston sleeve, the slider is a piston, and a toggle rod is provided on the upper side of the top turntable, so that the top turntable can be rotated by pushing the toggle rod, and the remaining turntables are also driven to rotate under the action of the corresponding guide members.

[0017] Preferably, the above scheme also includes an external demolding assembly detachably arranged above the outer cylinder assembly, the external demolding assembly includes a rotating frame coaxial with the outer cylinder body and a demolding motor for driving the rotating frame to rotate, adjacent outer cylinder bodies are threadedly connected, the outer side wall of each outer cylinder body is provided with at least one handle, the rotating frame is provided with a clamping claw detachably connected to the handle, so that when the adhesion force of the sample is small, the outer cylinder body can be directly manually rotated to achieve disassembly, and when the adhesion force of the sample is large, the clamping claw of the external demolding assembly can be connected to the handle, and the outer cylinder body can be driven to rotate by the demolding motor to achieve disassembly.

[0018] Preferably, the compaction assembly further comprises a jack, the compaction block is in a circular ring shape, a punch is provided on the bottom surface of the compaction block, and the jack is used to drive the compaction block to rise and fall in the area between the outer cylinder and the inner cylinder, thereby achieving effective compaction of the soil sample.

[0019] Compared with the prior art, the above solution has the following beneficial effects:

[0020] 1. The inner cylinder assembly is designed to include a plurality of inner cylinders that can rotate relative to the bracket. At the same time, due to the setting of the adapter unit on the bracket, when demoulding is required, the adjacent inner cylinders can be rotated in the opposite direction to achieve loosening and separation from the soil sample, thereby avoiding the problem that the sample is too close to the outer wall of the inner cylinder and the friction resistance is too large, resulting in the inability to demould. In addition, this design can make the inner cylinder assembly evenly stressed during demoulding, reduce the disturbance to the sample, and improve the stability of demoulding, thereby solving the problem of large stress in the static pressure method in the prior art, which easily causes the sample to tilt or crack;

[0021] 2. The outer cylinder assembly consists of multiple outer cylinders that are detachably connected to each other, so that the outer cylinders can be disassembled in layers to avoid excessive disturbance to the sample;

[0022] 3. The compaction assembly and the stirring assembly can be installed replaceably on the top of the outer cylinder assembly, so as to stir and compact the soil sample as needed. The two processes are carried out in the same device, reducing the cumbersome steps of replacing the device and avoiding the loss of sludge quality;

[0023] 4. The stirring assembly includes a fixed large gear and a number of small gears meshed with the large gear. When the stirring motor drives the limit frame to rotate, the small gears will rotate while revolving around the large gear, so that the gear rod can drive the stirring blades to revolve around the inner cylinder as the axis while rotating, so as to achieve more uniform stirring of the sample between the outer cylinder and the inner cylinder; and because the stirring blades are composed of multiple blades that can be detachably connected, the height of the stirring blades can be adjusted as needed to ensure that the stirring range can cover all soil samples and achieve sufficient stirring;

[0024] 5. The bottom surface of the compaction block is provided with a convex mold, which can engage with the soil sample more effectively, saving the step of scraping with a scraper alone and improving efficiency. Moreover, manual scraping cannot ensure the consistency of scraping degree of each layer, which seriously affects the credibility of the control experimental data. The above design can effectively solve the above problem.

[0025] 6. After the stirring blade is finished, the stirring blade can be disassembled and taken out. During the removal of the stirring blade, the stirring blade will pass through the rubber hole and the two will come into contact, thereby avoiding the sludge attached to the stirring blade from being brought out and reducing the loss of sludge.

[0026] The present invention also provides a method for using a device for preparing solidified silt hollow cylinder specimens and rotary demolding, which is applied to the device as described above, and includes the following steps:

[0027] S1. Select a corresponding number of outer cylinders according to the height of the specimen to be prepared, and arrange them in a vertically stacked manner coaxially. The bottom outer cylinder is detachably installed on the base; at the same time, set a corresponding number of inner cylinders on the bracket, and detachably install the bottom inner cylinder on the base;

[0028] S2. Fill the area between the outer cylinder and the inner cylinder with soil samples and solidifying materials, install the stirring assembly above the outer cylinder assembly, select a stirring blade with an appropriate length to extend into the soil sample for stirring, then remove the stirring assembly and install the compaction assembly above the outer cylinder assembly, and push the compaction block to compact the soil sample to form a specimen, and then remove the compaction assembly;

[0029] S3. Push the toggle rod to make the turntable drive the inner cylinder to rotate, and the rotation directions of two adjacent inner cylinders are opposite, and then move the inner cylinder assembly upward until it is separated from the specimen;

[0030] S4. Remove the outer cylinders in sequence from top to bottom, and the specimen demolding is completed.

[0031] Preferably, in step S2, the area between the outer cylinder and the inner cylinder is filled with soil samples in multiple times. After each filling of the soil sample forms a new soil sample layer, the new soil sample layer is stirred by the stirring assembly and compacted by the compaction assembly until a specimen is formed. Description of the Drawings

[0032] Figure 1 It is an overall schematic diagram of a device for preparing solidified silt hollow cylinder specimens and rotary demolding;

[0033] Figure 2 It is a schematic diagram of the outer cylinder assembly of a device for preparing solidified silt hollow cylinder specimens and rotary demolding;

[0034] Figure 3 It is a schematic diagram of the inner cylinder assembly of a device for preparing solidified silt hollow cylinder specimens and rotary demolding;

[0035] Figure 4 It is a schematic diagram of the inner cylinder of a device for preparing solidified silt hollow cylinder specimens and rotary demolding;

[0036] Figure 5 It is a schematic diagram of the stirring assembly of a device for preparing solidified silt hollow cylinder specimens and rotary demolding;

[0037] Figure 6 It is a top view of the cover plate of a device for preparing solidified silt hollow cylinder specimens and rotary demolding;

[0038] Figure 7 A top view of a large gear and a small gear of a solidified sludge hollow cylinder sample preparation and rotary demoulding device;

[0039] Figure 8 A schematic diagram of a compacting assembly of a solidified sludge hollow cylinder sample preparation and rotary demoulding device;

[0040] Figure 9 A schematic diagram of an outer demoulding component of a solidified sludge hollow cylinder sample preparation and rotary demoulding device;

[0041] Figure 10 The figure is a top view of the base of a solidified sludge hollow cylinder sample preparation and rotary demoulding device.

[0042] Description of reference numerals:

[0043] 1. Outer cylinder assembly; 11. Outer cylinder body; 12. Handle; 2. Inner cylinder assembly; 21. Inner cylinder body; 22. Bracket; 221. Fixing part; 23. Turntable; 231. Side push rod; 232. Toggle rod; 233. Horizontal rod; 234. Through hole; 24. Guide; 25. Slider; 251. First connecting rod; 252. Second connecting rod; 3. Stirring assembly; 31. Stirring blade; 311. Blade body; 32. Stirring motor; 321. Main transmission gear; 32 2. Transmission gear set; 33. Housing; 34. Limiting frame; 341. Hollow gear; 35. Large gear; 351. Hollow rod; 36. Gear rod; 37. Small gear; 38. Cover plate; 381. Mud guard hole; 382. Adapter hole; 4. Compacting assembly; 41. Compacting block; 5. External demoulding assembly; 51. Demolding motor; 52. Rotating frame; 53. Clamping claw; 6. Base; 61. First annular groove; 62. Second annular groove; 63. Socket; 7. Adapter cylinder. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings. The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention. It should also be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, inside, outside) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] Example 1

[0046] See also Figures 1-10 , a solidified sludge hollow cylinder sample preparation and rotary demoulding device provided by an embodiment of the present invention comprises a base 6 and:

[0047] The outer cylinder assembly 1 comprises at least two outer cylinders 11, which are arranged in a vertical stack and coaxial with each other, the outer cylinders 11 of adjacent layers are detachably connected, and the outer cylinder 11 of the bottom layer is detachably connected to the base 6;

[0048] The inner cylinder assembly 2 is located inside the outer cylinder assembly 1, and includes a bracket 22 and at least two inner cylinders 21. The bracket 22 is arranged vertically, and the inner cylinders 21 are arranged in a vertical stacked manner with the bracket 22 as the axis. The inner cylinders 21 of adjacent layers are rotatably connected. The bracket 22 is provided with a switching unit, which acts on the inner cylinders 21 and drives the adjacent inner cylinders 21 to rotate in the opposite direction. The inner cylinders 21 of the bottom layer can be detachably connected to the base 6;

[0049] The compacting assembly 4 is detachably disposed above the outer cylinder assembly 1, and secures a compacting block 41, which is used to extend between the outer cylinder 11 and the inner cylinder 21;

[0050] The stirring assembly 3 is detachably disposed above the outer cylinder assembly 1 and includes a stirring blade 31 and a stirring power member. The stirring blade 31 is used to extend between the outer cylinder body 11 and the inner cylinder body 21 , and the stirring power member is used to drive the stirring blade 31 to rotate.

[0051] In the above scheme, the inner cylinder assembly 2 is designed to include a plurality of inner cylinders 21 that can rotate relative to the bracket 22. At the same time, due to the setting of the adapter unit on the bracket 22, when demolding is required, the adjacent inner cylinders 21 can be rotated in the opposite direction to achieve loosening and separation from the soil sample, thereby avoiding the problem that the sample and the outer wall of the inner cylinder 21 are too close and the friction resistance is large, resulting in the inability to demold. In addition, this design can make the inner cylinder assembly 2 evenly stressed during demolding, reduce the disturbance of the sample, and improve the stability of demolding, thereby solving the problem that the static pressure method in the prior art is subjected to large forces and easily causes the sample to tilt or crack; at the same time, the outer cylinder assembly 1 is composed of a plurality of outer cylinders 11 that are detachably connected to each other, so that the outer cylinder 11 can be disassembled in layers to avoid the problem of excessive disturbance of the sample; in addition, the compaction assembly 4 and the stirring assembly 3 can be replaceably installed above the outer cylinder assembly 1, so that the soil sample can be stirred and compacted and solidified as needed, and the two processes are carried out in the same device, reducing the cumbersome steps of replacing the device and avoiding the loss of sludge quality.

[0052] The number of the outer cylinder body 11 or the inner cylinder body 21 can be increased or decreased according to the height of the required specimen. To make the description more specific, in this embodiment, the required specimen is a hollow cylinder, and the dimensions of the specimen are: height 200 mm, outer diameter 100 mm, and inner diameter 60 mm. It should be understood that the total heights of the outer cylinder assembly 1 and the inner cylinder assembly 2 do not need to be the same, as long as they are both higher than the height of the specimen. In this embodiment, the number of the outer cylinder bodies 11 is five, and the number of the inner cylinder bodies 21 is four. The height of the outer cylinder body 11 is 50 mm, the inner diameter is 100 mm, and the wall thickness is 3 mm, so that the total height of the outer cylinder assembly 1 is 250 mm; the height of the inner cylinder body 21 is 50 mm, the outer diameter is 60 mm, and the wall thickness is 3 mm, so that the total height of the inner cylinder assembly 2 is 200 mm, that is, the outer cylinder assembly 1 has a height difference of 50 mm relative to the inner cylinder assembly 2, and this 50-mm height difference is reserved for the stirring assembly 3 and the compaction assembly 4 to perform stirring or compaction.

[0053] Both the outer cylinder body 11 and the inner cylinder body 21 are cylindrical structures with openings at both the upper and lower ends. The detachable connection of the outer cylinder body 11 relative to the base 6 means that the outer cylinder body 11 can be positioned relative to the base 6. The specific detachable connection method is not limited in this design. For example, a first annular groove 61 for inserting the lower part of the outer cylinder body 11 is provided on the upper side surface of the base 6; similarly, the detachable connection of the inner cylinder body 21 relative to the base 6 means that the inner cylinder body 21 can be positioned relative to the base 6. The specific detachable connection method is not limited in this design. For example, a second annular groove 62 for inserting the lower part of the inner cylinder body 21 is provided on the upper side surface of the base 6. The first annular groove 61 and the second annular groove 62 are concentric, and the second annular groove 62 is located on the inner ring side of the second annular groove 62. In addition, a jack 63 for inserting the support 22 is provided at the center of the base 6 to realize the fixation of the support 22.

[0054] In this embodiment, threads are provided on both the upper and lower parts of the outer cylinder body 11, so that the adjacent outer cylinder bodies 11 are connected by threads, which is convenient for disassembly and assembly. As an optimization of the above solution, an outer demoulding assembly 5 detachably provided above the outer cylinder assembly 1 is further included. The outer demoulding assembly 5 includes a rotating frame 52 coaxial with the outer cylinder body 11 and a demoulding motor 51 for driving the rotating frame 52 to rotate. The adjacent outer cylinder bodies 11 are connected by threads, and at least one handle 12 is provided on the outer side wall of each outer cylinder body 11. The rotating frame 52 is provided with a clamp 53 for detachably connecting to the handle 12. Thus, when the bonding force of the specimen is small, the outer cylinder body 11 can be directly rotated manually to realize disassembly, and when the bonding force of the specimen is large, the clamp 53 of the outer demoulding assembly 5 can be connected to the handle 12, and the outer cylinder body 11 can be driven to rotate by the demoulding motor 51 to realize disassembly.

[0055] More specifically, the stirring assembly 3 further includes a housing 33, a stirring motor 32, and a limiting frame 34. The housing 33 is used for supporting and fixing. The large gear 35 is arranged horizontally. A hollow rod body 351 is provided in the middle of the large gear 35 and is fixedly connected upward to the housing 33, so as to realize the fixed connection of the large gear 35 relative to the housing 33. The inner hole of the hollow rod body 351 vertically penetrates the large gear 35. A hollow gear 341 is rotatably sleeved on the outside of the hollow rod body 351 at the upper part of the limiting frame 34. A plurality of gear rods 36 that can rotate vertically are provided on the outer peripheral side of the lower part of the limiting frame 34. A small gear 37 is sleeved on each gear rod 36, and each small gear 37 meshes with the large gear 35. The stirring blade 31 is connected to the bottom end of the gear rod 36. A main transmission gear 321 is provided on the upper part of the output shaft of the stirring motor 32, and the lower part passes through the hollow rod body 351 and extends below the large gear 35. A transmission gear set 322 is provided between the main transmission gear 321 and the hollow gear 341, so that the power of the output shaft of the stirring motor 32 is sequentially transmitted to the hollow gear 341 through the main transmission gear 321 and the transmission gear set 322. The hollow gear 341 drives the rotation of the limiting frame 34, so that the small gear 37 revolves around the large gear 35. After adopting this structure, when the stirring motor 32 drives the limiting frame 34 to rotate, the small gear 37 will rotate on its own while revolving around the large gear 35. Thus, the gear rod 36 can drive the stirring blade 31 to revolve around the axis of the inner cylinder 21 while rotating on its own, realizing more uniform stirring of the sample between the outer cylinder 11 and the inner cylinder 21. Moreover, since the stirring blade 31 is composed of a plurality of blade bodies 311 detachably connected, the height of the stirring blade 31 can be adjusted as needed to ensure that the stirring range can cover all the soil samples and achieve sufficient stirring.

[0056] Further, the transmission ratio among the main drive gear 321, the transmission gear set 322, and the hollow gear 341 is 1, so that the rotational speed of the output shaft of the stirring motor 32 is equal to the rotational speed of the limiting frame 24. The stirring assembly further includes a cover plate 38. The middle part of the cover plate 38 is fixedly connected to the lower part of the output shaft of the stirring motor 32, so that the cover plate 38 is located below the large gear 35. Thus, under the action of the stirring motor 32, the cover plate 38 and the limiting frame 34 rotate at the same rotational speed. The cover plate 38 is used to be rotatably mounted above the outer cylinder assembly 1. A transfer hole 382 penetrating vertically is further provided in the middle of the cover plate 38. The transfer hole 382 is rotatably sleeved on the bracket 22, and the rotation axis of the cover plate 38 is coaxial with the outer cylinder body 11. The bracket 22 is provided with a fixing part 221 for abutting against the cover plate 38 to realize axial limitation of the cover plate 38. In this embodiment, the fixing part 221 is two nuts respectively abutting against the upper side and the lower side of the cover plate 38. The outer diameter of the nut is larger than the aperture of the transfer hole 382, and the side wall of the upper end of the bracket 22 is provided with an external thread for screwing the nut. The cover plate 38 is provided with mud guard holes 381 having the same number as the stirring blades 31. The edge of the mud guard hole 381 is provided with a rubber edging. The positions of the mud guard holes 381 correspond to the stirring blades 31 one by one, and the shape of the mud guard hole 381 is the same as the cross-sectional shape of the stirring blade 31. When the stirring blade 31 is withdrawn from between the outer cylinder body 11 and the inner cylinder body 21 after stirring, the mud guard hole 381 can strip the soil sample attached to the stirring blade 31, reducing the loss of the soil sample. It should be noted that in order to ensure the stability of the cover plate 38, a transfer cylinder 7 can also be provided above the inner cylinder body 21 at the top layer of the inner cylinder assembly 2. The outer diameter of the transfer cylinder 7 is equal to the outer diameter of the inner cylinder body 21. The upper side surface of the transfer cylinder 7 is in the same plane as the upper side surface of the outer cylinder body 11 at the top layer of the outer cylinder assembly 1. The upper side surface of the transfer cylinder 7 is used for the cover plate 38 to abut against, and the outer side wall of the transfer cylinder 7 is used for the sample to abut against, preventing the upper part of the sample from deforming.

[0057] In this embodiment, the stirring blade 31 includes multiple layers of blade bodies 311 arranged in a stacked manner vertically. The adjacent blade bodies 311 are detachably connected. The transverse cross-section of the blade body 311 is cross-shaped. Thus, the height of the stirring blade 31 can be adjusted by disassembling and assembling the blade bodies 311. The detachable connection between the adjacent blade bodies 311 can be snap connection, plug connection, bolt connection, etc. The specific method is not limited in this design.

[0058] In this embodiment, the bracket 22 is in the shape of a circular shaft, and the adapter unit includes a turntable 23 and a guide member 24, and the number of the turntables 23 is the same as that of the inner cylinder 21. The two sides of the turntable 23 are connected to the inner cylinder 21 through horizontal rods 233, so that a coaxial turntable 23 is connected to each inner cylinder 21. A through hole is provided in the middle of each turntable 23 in the vertical direction for the bracket 22 to pass through, so that the turntables 23 can rotate relative to the bracket 22. One end of the guide member 24 is fixedly connected to the bracket 22, and there is a guide member 24 between two adjacent turntables 23; the other end of the guide member 24 is provided with a slider 25 that can slide in the horizontal direction, and the opposite sides of the two adjacent turntables 23 are respectively provided with side push rods 231 facing opposite directions, and the side push rods 231 are rotatably connected to the turntable 23 with the axis of the turntable 23 as the rotation axis. For better explanation, for example, in two adjacent turntables 23, the side push rod 231 of the upper turntable 23 is set forward, and the side push rod 231 of the lower turntable 23 is set backward. The slider 25 is rotatably connected with a first connecting rod 251 and a second connecting rod 252, the first connecting rod 251 is rotatably connected to the side push rod 231 of the upper turntable 23 of the corresponding two adjacent turntables 23, and the second connecting rod 252 is rotatably connected to the side push rod 231 of the lower turntable 23 of the corresponding two adjacent turntables 23, so that when the slider 25 slides relative to the guide member 24, the rotation directions of the corresponding two adjacent turntables 23 are opposite, thereby achieving the effect of opposite rotation directions of the adjacent inner cylinders 21.

[0059] More specifically, the guide member 24 is a piston sleeve, the slider 25 is a piston, and a toggle rod 232 is provided on the upper side of the top-layer turntable 23, so that by pushing the toggle rod 232, the top-layer turntable 23 can be rotated, and the remaining turntables 23 are also driven to rotate under the action of the corresponding guide members 24.

[0060] In this embodiment, the compaction assembly 4 further includes a jack (not shown in the figure), and the compaction block 41 is annular, and the inner diameter of the compaction block 41 is equal to the outer diameter of the inner cylinder 21, and the outer diameter of the compaction block 41 is equal to the inner diameter of the outer cylinder 11. The bottom surface of the compaction block 41 is provided with a convex mold, and the convex mold is corrugated. The jack is used to drive the compaction block 41 to rise and fall in the area between the outer cylinder 11 and the inner cylinder 21, so as to achieve effective compaction of the soil sample; and the convex mold can bite with the soil sample more effectively, saving the step of scraping with a scraper alone, and improving efficiency; moreover, manual scraping cannot ensure that the scraping degree of each layer is consistent, which seriously affects the credibility of the control experiment data, and the above design can effectively solve the above problem.

[0061] Example 2

[0062] The present invention also provides a method for using a solidified sludge hollow cylinder sample preparation and rotary demoulding device, which is applied to the above device and comprises the following steps:

[0063] S1. Select the corresponding number of outer cylinders 11 according to the required height of the sample preparation, and arrange them vertically in a coaxial manner in layers. The bottom outer cylinder 11 is detachably installed on the base 6. At the same time, set the corresponding number of inner cylinders 21 on the bracket 22, and detachably install the bottom inner cylinder 21 on the base 6;

[0064] S2. Fill the area between the outer cylinder 11 and the inner cylinder 21 with soil samples and solidifying materials, and install the stirring assembly 3 above the outer cylinder assembly 1. Select a stirring blade 31 with an appropriate length and insert it into the soil sample for stirring. Then remove the stirring assembly 3 and install the compaction assembly 4 above the outer cylinder assembly 1, and push the compaction block 41 to compact the soil sample to form a specimen. Then remove the compaction assembly 4;

[0065] S3. Push the toggle lever 232 to make the turntable 23 drive the inner cylinder 21 to rotate. The rotation directions of two adjacent inner cylinders 21 are opposite. Then move the inner cylinder assembly 2 upward until it is separated from the specimen;

[0066] S4. Remove the outer cylinders 11 in sequence from top to bottom, and the demolding of the specimen is completed.

[0067] As a further optimization of this embodiment, before filling the area between the outer cylinder 11 and the inner cylinder 21 with soil samples in step S2, apply a layer of release oil on the inner wall of the outer cylinder 11 and the outer wall of the inner cylinder 21 to facilitate smoother subsequent demolding.

[0068] As a further optimization of this embodiment, in step S2, fill the area between the outer cylinder 11 and the inner cylinder 21 in multiple times. After each filling of the soil sample to form a new soil sample layer, the new soil sample layer is stirred by the stirring assembly 3 and compacted by the compaction assembly 4 until a specimen is formed. For example, in step S2, the soil samples are filled between the outer cylinder 11 and the inner cylinder 21 four times in total. The first time, 1 / 4 of the soil sample and solidifying materials are filled. Then the stirring assembly 3 is installed above the outer cylinder assembly 1 and the first layer of soil sample is stirred according to the corresponding steps. Then the stirring assembly 3 is removed and the compaction assembly 4 is installed above the outer cylinder assembly 1 and the first layer of soil sample is compacted according to the corresponding steps. Then the compaction assembly 4 is removed. The second time, 1 / 4 of the soil sample and fixing materials are filled and stirred and compacted. The same applies to the third and fourth layers.

[0069] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. For those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the present disclosure, and these changes and modifications will all fall within the protection scope of the invention.

Claims

1. A device for preparing a solidified silt hollow cylinder sample and rotary demolding, characterized in that Comprising a base (6) and: An outer cylinder assembly (1), including at least two outer cylinders (11), the outer cylinders (11) being arranged in vertical layers and coaxial with each other, the adjacent outer cylinders (11) of different layers being detachably connected, and the bottom outer cylinder (11) being detachably connected to the base (6); An inner cylinder assembly (2), located inside the outer cylinder assembly (1), including a bracket (22) and at least two inner cylinders (21), the bracket (22) being arranged vertically, the inner cylinders (21) being arranged in vertical layers and all centered on the bracket (22), the adjacent inner cylinders (21) of different layers being rotatably connected, the bracket (22) being provided with a transfer unit, the transfer unit acting on the inner cylinder (21) and driving the adjacent inner cylinders (21) to rotate in opposite directions, and the bottom inner cylinder (21) being detachably connected to the base (6); A stirring assembly (3), detachably arranged above the outer cylinder assembly (1), including stirring blades (31) and a stirring power member, the stirring blades (31) being used to extend between the outer cylinder (11) and the inner cylinder (21), and the stirring power member being used to drive the rotation of the stirring blades (31); A compaction assembly (4), detachably arranged above the outer cylinder assembly (1), including a compaction block (41), the compaction block (41) being used to extend between the outer cylinder (11) and the inner cylinder (21).

2. The sample preparation and rotary demolding device for solidified silt hollow cylinders according to claim 1, wherein The stirring assembly (3) further includes a housing (33), a stirring motor (32) and a limiting frame (34), the housing (33) being fixedly connected with a large gear (35) arranged horizontally, the limiting frame (34) being rotatably arranged inside the housing (33) and coaxial with the large gear (35), a plurality of gear rods (36) that can rotate vertically being arranged on the outer peripheral side of the limiting frame (34), a small gear (37) being sleeved on each gear rod (36), the small gears (37) being meshed with the large gear (35), the stirring blades (31) being connected to the bottom ends of the gear rods (36), and the stirring motor (32) being used to drive the rotation of the limiting frame (34) so that the small gears (37) revolve around the large gear (35).

3. A sample preparation and rotary demoulding device for solidified silt hollow cylinders according to claim 2, characterized in that, The stirring assembly (3) further includes a cover plate (38), the cover plate (38) being located above the outer cylinder assembly (1), a transfer hole (382) vertically penetrating through the middle of the cover plate (38), the transfer hole (382) being rotatably sleeved on the bracket (22), and the bracket (22) being provided with a fixing portion (221) that abuts against the cover plate (38) to axially limit the cover plate (38); the cover plate (38) being provided with a number of mud guard holes (381) equal to the number of the stirring blades (31), the positions of the mud guard holes (381) corresponding to the stirring blades (31) one by one, the shape of the mud guard holes (381) being the same as the cross-sectional shape of the stirring blades (31), and the output shaft of the stirring motor (32) being connected to the middle of the cover plate (38) to drive the rotation of the cover plate (38).

4. A solidified silt hollow cylinder sample preparation and rotary demoulding device according to any one of claims 1-3, characterized in that, The stirring blade (31) comprises a plurality of blade bodies (311) arranged in a vertical stack, the blade bodies (311) of adjacent layers are detachably connected, and the transverse cross section of the blade body (311) is cross-shaped.

5. A device for preparing specimens of solidified silt in hollow cylinders and rotary demolding according to claim 1, characterized in that, The transfer unit comprises a turntable (23) and a guide member (24); the number of the turntables (23) is the same as the number of the inner cylinder (21) so that each inner cylinder (21) is connected to a coaxial turntable (23), and the turntables (23) can rotate relative to the bracket (22); the guide member (24) is connected to the bracket (22), and there is a guide member (24) between two adjacent turntables (23); the guide member (24) is provided with a slider (25) that can slide in the transverse direction, and the opposite sides of the two adjacent turntables (23) are respectively provided with The side push rods (231) face oppositely, and the side push rods (231) are rotatably connected to the turntable (23) with the axis of the turntable (23) as the rotation axis. The slider (25) is rotatably connected to a first connecting rod (251) and a second connecting rod (252). The first connecting rod (251) and the second connecting rod (252) are respectively rotatably connected to the two side push rods (231) on the opposite sides of the corresponding adjacent turntables (23), so that when the slider (25) slides relative to the guide member (24), the rotation directions of the corresponding two adjacent turntables (23) are opposite.

6. The solidified silt hollow cylinder sample preparation and rotary demoulding device according to claim 5, characterized in that, The guide member (24) is a piston sleeve, the slider (25) is a piston, and a toggle rod (232) is provided on the upper side of the top rotating disk (23).

7. A sample preparation and rotary demoulding device for solidified silt hollow cylinders according to claim 1, characterized in that, The invention also comprises an outer demoulding assembly (5) which is detachably arranged above the outer cylinder assembly (1), wherein the outer demoulding assembly (5) comprises a rotating frame (52) coaxial with the outer cylinder body (11) and a demoulding motor (51) for driving the rotating frame (52) to rotate, and adjacent outer cylinder bodies (11) are threadedly connected, and the outer side wall of each outer cylinder body (11) is provided with at least one handle (12), and the rotating frame (52) is provided with a clamping claw (53) for being detachably connected to the handle (12).

8. A device for preparing a solidified silt hollow cylinder sample and rotary demoulding according to claim 1, characterized in that, The compacting assembly (4) further comprises a jack, the compacting block (41) is in the shape of a ring, a convex mold is provided on the bottom surface of the compacting block (41), and the jack is used to drive the compacting block (41) to rise and fall in the area between the outer cylinder (11) and the inner cylinder (21).

9. A method for using a device for preparing solidified silt hollow cylinders and rotary demolding, which is applied to the device according to any one of claims 1-8, characterized in that, The steps include: S1. According to the required sample preparation height, a corresponding number of outer cylinders (11) are selected and arranged in a coaxial manner in a vertical stack, and the outer cylinders (11) of the bottom layer are detachably mounted on the base (6); at the same time, a corresponding number of inner cylinders (21) are arranged on the bracket (22), and the inner cylinders (21) of the bottom layer are detachably mounted on the base (6); S2, filling the area between the outer cylinder (11) and the inner cylinder (21) with soil sample and solidified material, and installing the stirring assembly (3) above the outer cylinder assembly (1), selecting a stirring blade (31) of suitable length to extend into the soil sample for stirring, then removing the stirring assembly (3) and installing the compacting assembly (4) above the outer cylinder assembly (1), and pushing the compacting block (41) to compact the soil sample to form a test sample, and then removing the compacting assembly (4); S3. Push the toggle lever (232) to make the turntable (23) drive the inner cylinder (21) to rotate. The rotation directions of two adjacent inner cylinders (21) are opposite. Then move the inner cylinder assembly (2) upward until it is separated from the specimen. S4. Disassemble the outer cylinder (11) in sequence from top to bottom, and the specimen demolding is completed.

10. The usage method of a device for preparing specimens of solidified silt hollow cylinders and rotary demolding according to claim 9, characterized in that, In step S2, fill the area between the outer cylinder (11) and the inner cylinder (21) with soil samples in multiple times. After each filling of the soil sample forms a new soil sample layer, the new soil sample layer is stirred by the stirring assembly (3) and compacted by the compaction assembly (4) until the specimen is formed.

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