Multi-specification soil sample preparation and demolding automatic integrated device

Abstract

The utility model discloses a multi-specification soil sample preparation and demolding automatic integrated device, and belongs to the technical field of soil sample preparation and demolding devices. Comprising a hexagonal nut and a cover-type nut fixed at the upper end of the hexagonal nut, and further comprises a telescopic electric loading device, a sample preparation device, a demolding device, a fixing device, a plurality of supporting stand columns, a plurality of vertical rods, a square base, a square top plate, a compaction plate and a demolding receiving disc, the multiple supporting stand columns are fixed between the square top plate and the square base, the multiple vertical rods are fixed between the square top plate and the square base, U-shaped linkage rods are symmetrically fixed between the compaction plate and the demolding receiving disc, the demolding receiving disc is arranged below the sample preparation device, and the sample preparation device is used for loading soil samples. And the demolding device is arranged above the demolding receiving disc, so that the technical effects of preparation and demolding of the soil sample are realized at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of soil sample preparation and demoulding devices, and more specifically, to an automatic integrated device for preparing and demoulding soil samples of various specifications. Background Art

[0002] In the process of studying the performance of soil samples, it is necessary to prepare and demold soil samples of different specifications according to the content of the experiment. According to the experimental specifications of the "Standard for Geotechnical Test Methods", the compaction method can be used to press loose soil particles into soil samples of a certain density and then remove the pressed soil samples from the mold by beating. However, the traditional molding and demolding processes are separate and independent of each other. For the same sample, two devices are used for compaction and demolding. This process is relatively cumbersome and time-consuming. Therefore, it is necessary to design a test device to combine the molding and demolding processes to improve the efficiency of sample preparation and demolding. The traditional method for preparing reshaped samples is static layered pressing, and manual pressing is performed by a tamping rod. Compaction using this method may cause uneven force on the sample surface, thereby creating a slope with a certain angle on the surface of the sample, affecting the compaction degree of the soil sample and causing a large error in the density of the soil sample.

[0003] The commonly used demoulding method is to place a punch on a hydraulic jack, place the mold to be demoulded on the punch, check whether the center line of the mold is aligned with the center line of the punch, and after alignment, shake the jack's remote rod to make it rise. When the upper surface of the mold is about 3 to 4 mm away from the demoulding platform, adjust the horizontal position of the jack so that the demoulding hole of the demoulding platform coincides with the inner diameter of the mold. After coincidence, shake the jack's rocker to demould. However, the disadvantages of this method are:

[0004] (1) It consumes a lot of manpower and has low demoulding efficiency;

[0005] (2) Since the demoulding speed is controlled by a hand crank, the demoulding speed is greatly affected by human disturbance, which causes the internal structure of the soil sample to be affected or even destroyed, seriously affecting the accuracy of the experimental data and causing the sample to be invalidated. The integrity of the sample when it is removed from the mold cannot be guaranteed.

[0006] The independent sample preparation and demolding processes make the entire testing process cumbersome and inefficient. Furthermore, conventional sample pressing and demolding devices increase the number of sample preparation equipment and molds, leading to higher test costs. To eliminate errors caused by manual operation, a voltage loading device can be used to complete sample compaction and demolding. To address these issues, a new testing device is urgently needed that integrates the two processes.

[0007] In view of this, we propose an automatic integrated device for preparing and demoulding soil samples of various specifications. Utility Model Content

[0008] 1. Technical problems to be solved

[0009] The purpose of this application is to provide an automatic integrated device for preparing and demolding soil samples of multiple specifications, which solves the technical problems in the above-mentioned background technology and achieves the technical effects of simultaneously preparing and demolding soil samples.

[0010] 2. Technical solution

[0011] The technical solution of the present application provides an automatic integrated device for preparing and demolding soil samples of multiple specifications, including a hexagonal nut and a cap nut fixed on the upper end of the hexagonal nut, and also includes a retractable electric loading device, a sample preparation device, a demolding device, a fixing device, multiple supporting columns, multiple vertical poles, a square base, a square top plate, a compacting plate and a demolding tray. The compacting plate is fixed to the lower end of the electric loading device, multiple supporting columns are fixed between the square top plate and the square base, multiple vertical poles are fixed between the square top plate and the square base, a U-shaped connecting rod is symmetrically fixed between the compacting plate and the demolding tray, the demolding tray is placed below the sample preparation device, the sample preparation device is used to load soil samples, and the demolding device is placed above the demolding tray.

[0012] As an optional solution to the technical solution of this application document, the electric loading device includes a loading rod, a pressure head, a screw, a tightening nut and a console. The lower end of the loading rod is coaxially fixed to the pressure head by a screw, the loading rod is threadedly connected to the tightening nut, and the loading rod is electrically connected to the console; the console is fixed on a square base, and the console includes a micrometer, a loading button, a pause button and an unloading button. The loading button, pause button and unloading button respectively control the descent, stop and rise of the pressure head.

[0013] As an optional solution to the technical solution of this application document, the square base includes multiple supporting columns, multiple poles and multiple hexagonal nuts. The multiple supporting columns are evenly distributed on the square base in a square shape. The supporting columns are threadedly connected to the square base. The poles are symmetrically distributed on both sides of the square surrounded by four supporting columns. The poles are threadedly connected to the square base, and the multiple hexagonal nuts are respectively threadedly connected to the supporting columns and the upper ends of the poles.

[0014] As an optional solution to the technical solution of the present application document, the sample preparation device includes a pressing cylinder, a mold, a compacting plate, and a sample preparation platform. The upper end of the pressing cylinder is recessed with a corresponding groove, and a pressing cylinder head is fixed on the top. The side wall of the pressing cylinder is pressed with a scale, and the diameter of the pressing head is the same as the diameter of the corresponding groove. The interior of the sample preparation platform contains a notch, and the cross-sectional size of the compacting plate is consistent with the size of the notch. The compacting plate includes a positioning plate and a second positioning hole and a positioning groove provided on the positioning plate. The length of the compacting plate minus the width of the positioning plate is equal to the side length of the sample preparation platform. The diameter of the circular hole on the surface of the sample preparation platform is adapted to the outer diameter of the mold base. The fixing device includes a stud and a knob. The knob is threadedly connected to the vertical rod, and the stud is threadedly connected to the knob.

[0015] As an optional solution of the technical solution of the present application document, the demolding device includes a demolding platform, a demolding receiving plate and a sample holding box, the sample holding box includes a holding box bottom plate, a holding box side wall fixed to the four edges of the holding box bottom plate, a plurality of springs fixed to the upper surface of the holding box bottom plate and a holding box top plate supported on the springs, the demolding platform includes a demolding box, a plurality of limit rods, a demolding chuck and limit holes symmetrically opened on the demolding, the demolding chuck is fixed on the demolding box, the limit rod passes through the demolding chuck and the demolding box, the limit rod is threadedly connected to the demolding chuck, the limit rod includes a rod body, a rotating rod head fixed to the rod body, a screw coaxially fixed to the rod body, a mark fixed to the screw and a pressure rod coaxially fixed to the rod body, the demolding receiving plate is located directly below the center of the sample preparation platform and the demolding platform, and is restricted from moving on the vertical rod by the limit holes, four connecting rods are connected to the side of the demolding receiving plate, and the upper side of the connecting rod is connected to the fixed plate located above the pressure head.

[0016] As an optional solution of the technical solution of this application document, the mold includes a mold cylinder and a mold base fixed at the bottom of the mold cylinder. The mold has three specifications: 60mm, 80mm and 100mm, and the inner diameter of the mold base corresponds to them.

[0017] 3. Beneficial effects

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] 1. The principle of this application is simple, easy to use and easy to operate. Since the sample is prepared by an electric loading device, the density of the soil sample can be better guaranteed during pressing, and the integrity of the sample can be maintained during demolding. It also improves the efficiency of compaction and demolding, liberates manpower, and improves test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a schematic diagram of the overall structure of an automatic integrated device for preparing and demoulding soil samples of various specifications disclosed in a preferred embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the overall rear view structure of an automatic integrated device for preparing and demoulding soil samples of various specifications disclosed in a preferred embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the overall bottom structure of a multi-specification soil sample preparation and demoulding automatic integrated device disclosed in a preferred embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the sample preparation platform structure of a multi-specification soil sample preparation and demoulding automatic integrated device disclosed in a preferred embodiment of the present application;

[0024] Figure 5 A preferred embodiment of the present application discloses an automatic integrated device for preparing and demoulding soil samples of various specifications. Figure 4 Schematic diagram of the internal structure;

[0025] Figure 6 This is a schematic diagram of the partial structure of a sample preparation platform of an automatic integrated device for preparing and demoulding soil samples of various specifications disclosed in a preferred embodiment of the present application;

[0026] Figure 7 This is a schematic diagram of the limit rod structure of an automatic integrated device for preparing and demoulding soil samples of various specifications disclosed in a preferred embodiment of the present application;

[0027] Figure 8 This is a schematic diagram of the demoulding receiving plate structure of a multi-specification soil sample preparation and demoulding automatic integrated device disclosed in a preferred embodiment of the present application;

[0028] Figure 9 This is a schematic diagram of the compacting plate structure of an automatic integrated device for preparing and demoulding soil samples of various specifications disclosed in a preferred embodiment of the present application;

[0029] Figure 10 This is a schematic diagram of the split structure of the compacting plate of an automatic integrated device for preparing and demoulding soil samples of various specifications disclosed in a preferred embodiment of the present application;

[0030] Figure 11 This is a schematic diagram of the compacting plate structure of an automatic integrated device for preparing and demoulding soil samples of various specifications disclosed in a preferred embodiment of the present application;

[0031] Figure 12 This is a schematic structural diagram of a sample preparation device for an automatic integrated device for preparing and demoulding soil samples of various specifications disclosed in a preferred embodiment of the present application;

[0032] Explanation of the reference numerals in the figure: 100, electric loading device; 200, sample preparation device; 300, fixing device; 400, demoulding device; 1, loading rod; 2, cap nut; 3, hexagonal nut; 4, pressing cylinder; 5, sample holder; 6, supporting column; 7, limiting rod; 8, compacting plate; 9, mold; 10, connecting rod; 11, first positioning hole; 12, sample preparation platform; 13, notch; 14, knob; 15, demoulding platform; 16, micrometer; 17, square base; 18, loading button; 19, pause button; 20, unloading button; 21, control console; 2 2. Compression nut; 23. Screw; 24. Vertical rod; 25. Limiting hole; 26. Demolding box; 27. Demolding chuck; 28. Pressing head; 29. Stud; 30. Demolding plate; 31. Square top plate; 71. Rotating rod head; 72. Rod body; 73. Lead screw; 74. Mark; 75. Pressing rod; 81. Positioning plate; 82. Second positioning hole; 83. Positioning groove; 91. Mold cylinder; 92. Mold base; 41. Coordinate groove; 42. Pressing cylinder head; 43. Scale; 51. Top plate of the tray; 52. Side wall of the tray; 53. Spring; 54. Bottom plate of the tray. DETAILED DESCRIPTION

[0033] The present application is further described in detail below with reference to the accompanying drawings.

[0034] An automatic integrated device for preparing and demolding soil samples of various specifications, comprising a hexagonal nut 3 and a cap nut 2 fixed to the upper end of the hexagonal nut 3, a retractable electric loading device 100, a sample preparation device 200, a demolding device 400, a fixing device 300, multiple support columns 6, multiple vertical rods 24, a square base 17, a square top plate 31, a compacting plate 8 and a demolding receiving plate 30, wherein the compacting plate 8 is fixed to the lower end of the electric loading device 100, multiple support columns 6 is fixed between the square top plate 31 and the square base 17, multiple vertical rods 24 are fixed between the square top plate 31 and the square base 17, a U-shaped connecting rod 10 is symmetrically fixed between the compacting plate 8 and the demoulding receiving plate 30, the demoulding receiving plate 30 is placed below the sample preparation device 200, the sample preparation device 200 is used to load the soil sample, and the demoulding device 400 is placed above the demoulding receiving plate 30, the connecting rod 10 is symmetrically opened with first positioning holes 11, and the vertical rods 24 pass through the first positioning holes 11.

[0035] The electric loading device 100 includes a loading rod 1, a pressure head 28, a screw 23, a tightening nut 22 and a console 21. The lower end of the loading rod 1 is coaxially fixed to the pressure head 28 by the screw 23. The tightening nut 22 is threadedly connected to the loading rod 1, and the loading rod 1 is electrically connected to the console 21; the console 21 is fixed on the square base 17, and the console 21 includes a micrometer 16, a loading button 18, a pause button 19 and an unloading button 20. The loading button 18, the pause button 19 and the unloading button 20 respectively control the descent, stop and rise of the pressure head 28.

[0036] The square base 17 includes multiple supporting columns 6, multiple vertical rods 24 and multiple hexagonal nuts 3; multiple supporting columns 6 are evenly distributed on the square base 17 in a square shape, the supporting columns 6 are threadedly connected to the square base 17, and a screw 73 is provided at the lower end of the supporting column 6. The circular holes corresponding to the supporting columns 6 and the square base 17 are provided with corresponding threads, which are threadedly connected to the screw 73 at the lower end of the supporting column 6. The vertical rods 24 are symmetrically distributed on both sides of the square surrounded by the four supporting columns 6, the vertical rods 24 are threadedly connected to the square base 17, and multiple hexagonal nuts 3 are respectively threadedly connected to the upper ends of the supporting columns 6 and the vertical rods 24.

[0037] The sample preparation device 200 includes a pressing cylinder 4, a mold 9, a compacting plate 8, and a sample preparation platform 12. The upper end of the pressing cylinder 4 is recessed with a corresponding groove 41, and a pressing cylinder head 42 is fixed on the top. The side wall of the pressing cylinder 4 is pressed with a scale 43. The diameter of the pressing head 28 is the same as the diameter of the corresponding groove 41, which makes it easy to align the center line of the pressing cylinder 4 with the center line of the pressing head 28 when loading the sample; the sample preparation platform 12 contains a notch 13 inside, the height of the notch 13 is 10 mm, and the width is less than the distance between the two vertical rods 24. The cross-sectional size of the compacting plate 8 is consistent with the size of the notch 13, the compacting plate 8 includes a positioning plate 81 and a second positioning hole 82 and a positioning groove 83 provided on the positioning plate 81. The length of the compacting plate 8 minus the width of the positioning plate 81 is equal to the side length of the sample preparation platform 12. The thickness of the positioning plate 81 is 15 mm, which is 5 mm higher than the thickness of the notch 13, which is convenient for compacting during sample preparation. The solid plate 8 is inserted into the slot 13 and aligned with the second positioning hole 82. After alignment, a round head bolt is placed in the second positioning hole 82 to fix it to prevent relative sliding between the compacting plate 8 and the sample preparation platform 12 during the sample preparation process; the outer diameter specification of the mold base 92 is 110 mm, which is convenient for aligning the mold 9 with the positioning groove 83 on the compacting plate 8 during sample preparation. The diameter of the circular hole on the surface of the sample preparation platform 12 is adapted to the outer diameter of the mold base 92, which is convenient for placing and taking the mold 9; the fixing device 300 includes a stud 29 and a knob 14. The knob 14 is threadedly connected to the vertical rod 24, and the stud 29 is threadedly connected to the knob 14. When fixing the mold 9, first turn and loosen the knob 14 so that the fixing device 300 can move along the surface of the vertical rod 24. When the stud 29 is 2 to 3 mm away from the outer wall of the mold tube 91, tighten the knob 14 and rotate the stud 29 to make it press against the outer wall of the mold tube 91.

[0038] The demoulding device 400 includes a demoulding platform 15, a demoulding receiving plate 30 and a sample tray 5, the sample tray 5 includes a tray bottom plate 54, tray side walls 52 fixed to the four edges of the tray bottom plate 54, a plurality of springs 53 fixed to the upper surface of the tray bottom plate 54 and a tray top plate 51 supported on the springs 53, the demoulding platform 15 includes a demoulding box 26, a plurality of limiting rods 7, a demoulding chuck 27 and limiting holes 25 symmetrically opened on the demoulding, the demoulding chuck 27 is fixed on the demoulding box 26, the limiting rods 7 pass through the demoulding chuck 27, and the limiting holes 25 symmetrically opened on the demoulding chuck 27. The demoulding chuck 27 and the demoulding box 26 have two circular through holes with threads on the side of the demoulding chuck 27. Two circular holes are provided at the positions corresponding to the circular through holes of the demoulding box 26. The limiting rod 7 passes through the circular holes and the through holes. The limiting rod 7 is threadedly connected to the demoulding chuck 27. The limiting rod 7 includes a rod body 72, a rotating rod head 71 fixed to the rod body 72, a screw 73 coaxially fixed to the rod body 72, a mark 74 fixed on the screw 73 and a pressure rod 75 coaxially fixed to the rod body 72. The rotating rod head 71 controls the extension and contraction of the limit rod 7, so that molds 9 of different specifications can be demoulded; the demoulding receiving plate 30 is located just below the center of the sample preparation platform 12 and the demoulding platform 15, and is limited to move on the vertical rod 24 through the limit hole 25. The side of the demoulding receiving plate 30 is connected to four connecting rods 10, and the upper side of the connecting rod 10 is connected to the fixed plate located above the pressure head 28, thereby ensuring that the downward movement rate of the demoulding receiving plate 30 is consistent with the downward movement rate of the pressure head 28, thereby preventing the sample from being ejected from the mold 9. The sample is damaged due to the inconsistency between the ejection rate and the downward movement rate of the demoulding receiving plate 30; when the pressure head 28 hits the co-position groove 41 on the pressing cylinder 4, the distance between the demoulding receiving plate 30 and the bottom of the demoulding platform 15 is 40 mm, and the height of the sample tray 5 is also 40 mm. At this time, the sample tray 5 can be placed on the demoulding receiving plate 30. When the sample contacts the sample tray 5, the spring 53 can effectively alleviate the impact force generated by the contact between the sample and the tray top plate 51, effectively preventing damage to the sample structure due to impact.

[0039] The mold 9 includes a mold barrel 91 and a mold base 92 fixed to the bottom of the mold barrel 91. The mold 9 has three specifications: 60 mm, 80 mm and 100 mm, and the inner diameter of the mold base 92 corresponds to them.

[0040] Working principle: According to different test requirements, select different specifications of molds 9 and corresponding pressing cylinders 4, and weigh the soil samples required for each layer;

[0041] Insert the compacting plate 8 into the square notch 13, insert the round head bolt into the first positioning hole 11 to fix the compacting plate 8, place the mold 9 at the positioning groove 83 on the surface of the compacting plate 8, then adjust the fixing device 300, loosen the knob 14 and manually lower the fixing device 300, tighten the knob 14 when the stud 29 is 2 to 3 mm away from the surface of the mold 9, and turn the stud 29 to press the mold 9 tightly, then slowly add the weighed soil sample along the inner wall of the mold 9, and then place the pressing cylinder above the mold 9 4. Press the load button 18 to compact the soil sample under the pressure of the pressure cylinder 4. The soil sample is compacted in five layers. The scale 43 corresponding to the upper surface of the compaction mold 9 of each layer can be calculated by the height of the sample and the scale 43 on the pressure cylinder 4, or the compaction degree of each layer of soil sample can be ensured by the change of the corresponding value of the compaction displacement dial in five times. After each layer of soil sample is compacted, the surface of each layer of soil is scraped with a scraper to a depth of about 1 to 2 cm to strengthen the connection between each layer of soil sample, thereby ensuring the integrity of the sample;

[0042] When demoulding, first press the loading button 18 to make the pressure head 28 rise slightly, then remove the pressure cylinder 4, loosen the stud 29 and the knob 14, move the fixing device 300 upward, take out the mold 9 and pull out the round head bolt, pull out the compacting plate 8, adjust the limit rod 7, rotate the rotating rod head 71 so that the mark 74 on the rod body 72 is aligned with the inner wall of the demoulding chuck 27, then put the mold 9 with the sample on the pressure rod 75 of the limit rod 7, place a pressure cylinder 4 above the mold 9, align the pressure cylinder 4 with the sample, press the loading button 18, and when the pressure cylinder 4 is pressed, the sample is removed. When the head 28 is embedded in the corresponding groove 41 on the pressing cylinder 4, press the pause button 19 and place the sample tray 5 on the demolding tray 30. The height of the sample tray 5 is the same as the distance from the demolding tray 30 to the lower surface of the demolding platform 15. Then press the load button 18 to continue to apply pressure so that the sample falls on the sample tray 5. Since a spring 53 is installed under the tray top plate 51, the damage to the sample caused by the impact between the sample and the tray top plate 51 can be reduced to a certain extent until the sample is completely removed from the mold 9 and the demolding is completed.

[0043] The utility model overcomes the shortcomings of the traditional device in which sample preparation and demoulding are separated from each other through the above method, saves manpower, and shortens the test cycle. Since a voltage loading device is used for sample preparation and demoulding, the efficiency of sample preparation becomes higher and the artificial disturbance to the soil becomes smaller.

Claims

1. An automatic integrated device for preparing and demoulding soil samples of various specifications, comprising a hexagonal nut (3) and a cap nut (2) fixed on the upper end of the hexagonal nut (3), characterized in that: The invention also comprises a retractable electric loading device (100), a sample preparation device (200), a demoulding device (400), a fixing device (300), a plurality of supporting columns (6), a plurality of vertical rods (24), a square base (17), a square top plate (31), a compacting plate (8) and a demoulding receiving tray (30), wherein the compacting plate (8) is fixed at the lower end of the electric loading device (100), the plurality of supporting columns (6) are fixed between the square top plate (31) and the square base (17), the plurality of vertical rods (24) are fixed between the square top plate (31) and the square base (17), a U-shaped connecting rod (10) is symmetrically fixed between the compacting plate (8) and the demoulding receiving tray (30), the demoulding receiving tray (30) is placed below the sample preparation device (200), the sample preparation device (200) is used for loading soil samples, and the demoulding device (400) is placed above the demoulding receiving tray (30).

2. The automatic integrated device for preparing and demoulding multi-specification soil samples according to claim 1, characterized in that: The electric loading device (100) comprises a loading rod (1), a pressure head (28), a screw (23), a clamping nut (22) and a control console (21); the lower end of the loading rod (1) is coaxially fixed to the pressure head (28) by the screw (23); the loading rod (1) is threadedly connected to the clamping nut (22); the loading rod (1) is electrically connected to the control console (21); the control console (21) is fixed on a square base (17); the control console (21) comprises a micrometer (16), a loading button (18), a pause button (19) and an unloading button (20); the loading button (18), the pause button (19) and the unloading button (20) respectively control the descent, stop and rise of the pressure head (28).

3. The automatic integrated device for preparing and demoulding soil samples of various specifications according to claim 1, characterized in that: The square base (17) comprises a plurality of supporting columns (6), a plurality of vertical rods (24) and a plurality of hexagonal nuts (3). The plurality of supporting columns (6) are evenly distributed on the square base (17) in a square shape. The supporting columns (6) are threadedly connected to the square base (17). The vertical rods (24) are symmetrically distributed on both sides of the square surrounded by the four supporting columns (6). The vertical rods (24) are threadedly connected to the square base (17). The plurality of hexagonal nuts (3) are respectively threadedly connected to the upper ends of the supporting columns (6) and the vertical rods (24).

4. The automatic integrated device for preparing and demoulding soil samples of various specifications according to claim 2, characterized in that: The sample preparation device (200) comprises a pressing cylinder (4), a mold (9), a compacting plate (8), and a sample preparation platform (12). The upper end of the pressing cylinder (4) is recessed with a corresponding groove (41), and a pressing cylinder head (42) is fixed on the top. The side wall of the pressing cylinder (4) is pressed with a scale (43). The diameter of the pressing head (28) is the same as the diameter of the corresponding groove (41). The sample preparation platform (12) includes a notch (13) inside. The cross-sectional size of the compacting plate (8) is the same as that of the notch (13). ) are consistent in size, the compacting plate (8) includes a positioning plate (81) and a second positioning hole (82) and a positioning groove (83) provided on the positioning plate (81), the length of the compacting plate (8) minus the width of the positioning plate (81) is equal to the side length of the sample preparation platform (12), the fixing device (300) includes a stud (29) and a knob (14), the knob (14) is threadedly connected to the vertical rod (24), and the stud (29) is threadedly connected to the knob (14).

5. The multi-specification soil sample preparation and demoulding automatic integrated device according to claim 1, characterized in that: The demoulding device (400) includes a demoulding platform (15), a demoulding receiving plate (30) and a sample tray (5), wherein the sample tray (5) includes a tray bottom plate (54), tray side walls (52) fixed to four edges of the tray bottom plate (54), a plurality of springs (53) fixed to the upper surface of the tray bottom plate (54) and a tray top plate (51) supported on the springs (53), and the demoulding platform (15) includes a demoulding box (26), a plurality of limiting rods (7), a demoulding chuck (27) and limiting holes (25) symmetrically opened on the demoulding, wherein the demoulding chuck (27) is fixed on the demoulding box (26), and the limiting rods (7) pass through the demoulding chuck (27) and the demoulding box (26). 6), the limiting rod (7) is threadedly connected to the demoulding chuck (27), the limiting rod (7) includes a rod body (72), a rotating rod head (71) fixed to the rod body (72), a screw (73) coaxially fixed to the rod body (72), a mark (74) fixed on the screw (73) and a pressure rod (75) coaxially fixed to the rod body (72), the demoulding receiving plate (30) is located directly below the center of the sample preparation platform (12) and the demoulding platform (15), and is limited to move on the vertical rod (24) through the limiting hole (25), and four connecting rods (10) are connected to the side of the demoulding receiving plate (30), and the upper side of the connecting rod (10) is connected to the fixed plate located above the pressure head (28).

6. The automatic integrated device for preparing and demoulding soil samples of various specifications according to claim 4, characterized in that: The mold (9) comprises a mold barrel (91) and a mold base (92) fixed at the bottom of the mold barrel (91). The mold (9) has three specifications: 60mm, 80mm and 100mm, and the inner diameter of the mold base (92) corresponds to the specifications.

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