Liquid limit adjusting and testing device
By designing a liquid limit adjustment and testing device including a mixer, a mixing bowl, a mixing head and a testing mechanism, the problems of high labor intensity and low efficiency caused by manual operation in the prior art are solved, and more efficient and accurate liquid limit adjustment and measurement are achieved.
Patent Information
- Application Number
- CN202420999005.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-05-10
AI Technical Summary
In the prior art, soil liquid limit adjustment mainly relies on manual operations, resulting in high labor intensity and low efficiency, and the adjustment time of different soils is different, making it difficult to achieve efficient liquid limit determination.
A liquid limit adjustment test device is designed, including a mixer, a mixing bowl, a mixing head and a testing mechanism. The electric liquid limit is adjusted through the coordination between the mixer and the mixing head to reduce the intensity of manual labor, and real-time detection and adjustment of the soil samples are carried out through testing.
This device greatly reduces the labor intensity of operating labor, improves the efficiency of soil liquid regulation, and can complete liquid limit regulation and measurement more quickly and accurately. It is suitable for different types of soil.
Smart Images
Figure CN222850458U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of geotechnical testing, and relates to a device capable of adjusting the state of soil, in particular to a liquid limit adjustment test device. Background Art
[0002] The limit moisture content of soil changing from flowing state to plastic state (or from plastic state to flowing state) is called liquid limit. The determination method of liquid limit mainly includes the following steps: firstly, the soil sample is adjusted to liquid limit (the soil sample is mixed with water to form a plastic soil sample), then the soil sample is compacted and placed on the soil liquid and plastic limit combined measuring instrument for measurement, and the natural consistency and plasticity index of the soil are automatically calculated by sensing the cone penetration depth of the soil. The determination of liquid limit has a wide range of applications in geotechnical engineering and can provide an important basis for engineering design.
[0003] At present, the work of adjusting the liquid limit of soil samples is done entirely manually, and manual stirring is required, which is time-consuming and labor-intensive. In addition, due to the different properties of the soil, the liquid limit adjustment of some soils will take longer. During the entire process of adjusting the liquid limit, the samples need to be tested at any time to detect the large particles and hardness in them, so as to adjust the liquid limit in the later stage. This is not only labor-intensive, but also greatly reduces the efficiency of adjusting the liquid limit. Utility Model Content
[0004] The utility model aims to provide a liquid limit adjustment test device which has a scientific and reasonable structural design, reduces labor intensity, improves work efficiency, is convenient to operate and easy to implement.
[0005] The utility model solves the technical problem through the following technical solutions:
[0006] A liquid limit adjustment test device, characterized in that it includes a mixer, a mounting seat, a mixing bowl, a mixing head and a testing mechanism, wherein a mounting seat is installed on the base of the mixer, a mixing bowl is installed on the mounting seat, and a mixing head is installed on the mixer head directly above the mixing bowl; the mixing head includes a cover plate, a connecting head and a mixing blade, a connecting head is arranged at the center position of the upper end surface of the cover plate, the connecting head is connected to the connecting rod on the mixer head by screws, and vertical mixing blades are arranged in a circle on the lower end surface of the cover plate; and a testing mechanism is arranged at the rear of the mixing head on the side of the head.
[0007] Moreover, the mounting base is installed on the base of the mixer through a first locking structure, and the first locking structure includes a locking column and an L-shaped locking groove. A first mounting groove is provided on the base of the mixer, and two laterally extending locking columns are symmetrically arranged on the inner wall of the first mounting groove. L-shaped locking grooves are symmetrically opened at both ends of the bottom of the mounting base, and the vertical part of the L-shaped locking groove passes through the bottom of the mounting base, and the horizontal part of the L-shaped locking groove is adapted to the height of the locking column.
[0008] Moreover, the mixing bowl is installed on the mounting seat through a second locking structure, the second locking structure includes a locking tongue and a transverse locking groove, a mounting boss is provided in the middle of the upper end surface of the mounting seat, a second mounting groove is provided on the mounting boss, and a transverse locking tongue is provided on the inner wall of the second mounting groove; a cylindrical locking boss is provided at the bottom of the mixing bowl, a straight outer wall is cut on one side of the arc-shaped outer wall of the locking boss, and a transverse locking groove is provided on the arc-shaped outer wall and the straight outer wall, and the locking tongue is slidably arranged in the transverse locking groove.
[0009] Moreover, a rubber ring is arranged at a position on the outer wall of the mixing bowl that contacts the mounting seat.
[0010] Moreover, it also includes a material retaining eave, and a circle of material retaining eaves inclined downward is provided on the outer edge of the cover plate.
[0011] Moreover, the testing mechanism includes an extended base, a rotating sleeve, a top screw and a test probe. The test probe includes a needle rod and a cone head concentrically arranged at the bottom of the needle rod, and a scale is provided on the cone head. An extended base is provided at the rear position of the side of the mixer base, and a rotating sleeve is rotatably installed on the side of the machine head at the upper end of the extended base. The needle rod of the test probe is inserted into the rotating sleeve, and the needle rod of the test probe is tightened and limited by a top screw set on the wall of the rotating sleeve.
[0012] The advantages and beneficial effects of the utility model are:
[0013] 1. This liquid limit adjustment test device greatly reduces the labor intensity of operators by changing the current manual liquid limit adjustment method to an electric liquid limit adjustment method using a mixer and a mixing head. The vertical mixing blade on the mixing head can cut the soil sample, accelerate the mixing with water, and improve the soil adjustment efficiency. During the adjustment process, the mixer can be stopped at any time, and the soil sample can be tested using the test probe on it to facilitate subsequent liquid limit adjustment.
[0014] 2. The liquid limit adjustment test device can enhance the stability of the mixing bowl on the mounting seat during operation and reduce the noise generated by the collision between the two by setting the rubber ring on the mixing bowl.
[0015] 3. The liquid limit adjustment test device can avoid the problem of soil sample splashing out from the gap between the pressure cover and the mixing bowl during the mixing process by setting the material retaining edge.
[0016] 4. The utility model is scientifically and reasonably designed, has the advantages of reducing labor intensity, improving work efficiency, convenient operation and easy implementation, and is a liquid limit adjustment test device with high innovation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structure of the utility model (test mechanism omitted);
[0018] Figure 2 This is a structural schematic diagram of the mixer head of the utility model being lifted;
[0019] Figure 3 This is a schematic diagram of the structure of the mounting seat of the utility model;
[0020] Figure 4 for Figure 3 A top view of
[0021] Figure 5 This is a structural schematic diagram of the base part of the mixer of the utility model;
[0022] Figure 6 This is a schematic diagram of the structure of the mixing bowl of the utility model;
[0023] Figure 7 This is a schematic diagram of the stirring blade of the utility model being arranged on the cover plate;
[0024] Figure 8 It is a side view of the utility model.
[0025] Reference numerals
[0026] 1-machine head, 2-connecting head, 3-mixing head, 4-mixing bowl, 5-mounting seat, 6-mixer, 7-base, 8-connecting rod, 9-cover plate, 10-mixing blade, 11-mounting boss, 12-second mounting groove, 13-L-shaped locking groove, 14-locking tongue, 15-first mounting groove, 16-locking column, 17-rubber ring, 18-lateral locking groove, 19-locking boss, 20-test probe, 21-top screw, 22-rotating sleeve, 23-metal container, 24-extension base. DETAILED DESCRIPTION
[0027] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not restrictive, and the protection scope of the present invention cannot be limited by them.
[0028] A liquid limit adjustment test device, the innovation of which lies in: comprising a mixer 6, a mounting seat 5, a mixing bowl 4, a mixing head 3 and a testing mechanism, wherein a mounting seat is mounted on a base 7 of the mixer, a mixing bowl is mounted on the mounting seat, and a mixing head is mounted on a mixer head 1 directly above the mixing bowl; the mixing head comprises a cover plate 9, a connecting head 2 and a mixing blade 10, a connecting head is arranged at the center position of the upper end surface of the cover plate, the connecting head is connected to a connecting rod 8 on the mixer head by screws, mixing blades arranged vertically in a circle on the lower end surface of the cover plate, and a testing mechanism is arranged at the rear of the mixing head on the side of the head.
[0029] like Figure 7 As shown in the figure, the stirring blades are arranged on the cover plate in a staggered manner, that is, the front end of the stirring blade (the rotation direction is forward) is placed on the outside of the stirring blade. This arrangement allows the soil sample to be thrown onto the tail of the previous stirring blade along the tangent direction of the stirring blade when rotating and stirring, thus avoiding the problem of soil sample being thrown out. The staggered arrangement improves the efficiency of breaking the soil sample.
[0030] The mounting seat is installed on the base of the mixer through a first locking structure. The first locking structure includes a locking column 16 and an L-shaped locking groove 13. A first mounting groove 15 is provided on the base of the mixer. Two laterally extending locking columns are symmetrically arranged on the inner wall of the first mounting groove. L-shaped locking grooves are symmetrically opened at both ends of the bottom of the mounting seat. The vertical part of the L-shaped locking groove passes through the bottom of the mounting seat, and the horizontal part of the L-shaped locking groove is adapted to the height of the locking column.
[0031] When assembling the mounting base and the mixer, the L-shaped locking grooves on both sides are placed opposite to the locking columns and then downward until the mounting base contacts the bottom of the first mounting groove. Then, the mounting base is rotated so that the locking columns are placed in the horizontal part of the L-shaped locking grooves, thereby completing the assembly of the mounting base and the mixer.
[0032] The mixing bowl is mounted on the mounting seat via a second locking structure, the second locking structure comprising a locking tongue 14 and a transverse locking groove 18, a mounting boss 11 is provided in the middle of the upper end surface of the mounting seat, a second mounting groove 12 is provided on the mounting boss, and a transverse locking tongue is provided on the inner wall of the second mounting groove; a cylindrical locking boss 19 is provided at the bottom of the mixing bowl, a straight outer wall is cut on one side of the arc-shaped outer wall of the locking boss, and transverse locking grooves are provided on the arc-shaped outer wall and the straight outer wall, and the locking tongue is slidably arranged in the transverse locking groove.
[0033] When assembling the mixing bowl and the mounting seat, place one end of the straight outer wall of the mixing bowl downwardly facing the locking tongue on the mounting seat until the locking boss of the mixing bowl contacts the bottom of the second mounting groove, and then rotate the mixing bowl to make the locking tongue slide into the transverse locking groove, thereby completing the assembly of the mixing bowl and the mounting seat.
[0034] In order to increase the stability of the mixing bowl when mounted on the mounting seat, a rubber ring 17 is provided on the outer wall of the mixing bowl at a position in contact with the mounting seat.
[0035] In order to avoid the problem of soil sample splashing caused by loose press-fitting of the cover plate and the mixing bowl, a circle of downwardly inclined material retaining eaves (not shown in the figure) is provided on the outer edge of the cover plate.
[0036] The testing mechanism includes an extension base 24, a rotating sleeve 22, a top screw 21 and a test probe 20. The test probe includes a needle rod and a cone head concentrically arranged at the bottom of the needle rod. The cone head is provided with three scales of 9mm, 10mm and 11mm from bottom to top. An extension base is provided at the rear position of the side of the mixer base. A rotating sleeve is rotatably installed on the side of the head at the upper end of the extension base. The needle rod of the test probe is inserted into the rotating sleeve, and the needle rod of the test probe is tightened and limited by a top screw arranged on the wall of the rotating sleeve.
[0037] The overall weight of the test probe is 76g, the total length is 30cm, the height of the cone head is 2.5cm, and the taper of the cone head is 30°. The weight of the test probe and the specifications of the cone head on the utility model are the same as those of the test probe on the digital soil liquid and plastic limit combined measuring instrument, thereby ensuring the standardization of the measurement data.
[0038] When the test probe is not in use, the rotating sleeve is in a horizontal state, and the test probe therein is limited by the top screw for easy storage; when the test probe is in use, the rotating sleeve is in a vertical state, and the top screw is loosened to make the test probe freely retractable in the rotating sleeve, and the stirred soil sample is compacted in a metal container 23, which is placed on an extended base. The test probe freely falls due to its own weight, and a rough test of the soil sample is performed by observing the depth of the cone head on it into the soil.
[0039] During the mixing process, the machine should be stopped at any time to test the samples: first, check whether there are large particles in the soil sample that have not been broken. If there are large particles, it will have a great impact on the test data. In this case, the speed of the mixer should be increased and the sample should be mixed until it is completely broken; second, when the soil sample is in a uniform state, the test probe should be used to roughly test the penetration depth of the uniform soil sample. In the case of particularly hard soil, distilled water should be sprayed on the soil sample appropriately to reduce the cohesion of the sample, and then the machine should be turned on and stirred until the test probe's rough detection of the cone penetration depth value is within the range of 9mm-11mm. The soil sample can then be taken out and placed in the digital soil liquid and plastic limit combined measuring instrument for detailed testing. When the detailed test value reaches 10mm (the national standard requires a cone penetration depth of 10mm±0.2mm), the soil sample test is completed. At this time, the moisture content displayed on the digital soil liquid and plastic limit combined measuring instrument is the liquid limit index of the soil sample.
[0040] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.
Claims
1. A liquid limit adjustment test device, characterized in that: The invention comprises a mixer (6), a mounting seat (5), a mixing bowl (4), a mixing head (3) and a testing mechanism. The mounting seat (5) is mounted on a base (7) of the mixer (6), the mixing bowl (4) is mounted on the mounting seat (5), and the mixing head (3) is mounted on a head (1) of the mixer (6) directly above the mixing bowl (4). The mixing head (3) comprises a cover plate (9), a connecting head (2) and a mixing blade (10). The connecting head (2) is arranged at the center of the upper end surface of the cover plate (9), and the connecting head (2) is connected to a connecting rod (8) on the head (1) of the mixer (6) by screws. A vertical mixing blade (10) is arranged in a circle on the lower end surface of the cover plate (9), and a testing mechanism is arranged at the rear of the mixing head on the side of the head.
2. A liquid limit adjustment test device according to claim 1, characterized in that: The mounting seat (5) is mounted on the base (7) of the mixer (6) via a first locking structure, wherein the first locking structure comprises a locking column (16) and an L-shaped locking groove (13). A first mounting groove (15) is provided on the base (7) of the mixer (6), and two locking columns (16) extending laterally are symmetrically arranged on the inner wall of the first mounting groove (15). L-shaped locking grooves (13) are symmetrically provided at both ends of the bottom of the mounting seat (5), wherein the vertical portion of the L-shaped locking groove (13) passes through the bottom of the mounting seat (5), and the horizontal portion of the L-shaped locking groove (13) matches the height of the locking column (16).
3. A liquid limit adjustment test device according to claim 1, characterized in that: The mixing bowl (4) is mounted on the mounting seat (5) via a second locking structure, the second locking structure comprising a locking tongue (14) and a transverse locking groove (18), a mounting boss (11) is provided in the middle of the upper end surface of the mounting seat (5), a second mounting groove (12) is provided on the mounting boss (11), and a transverse locking tongue (14) is provided on the inner wall of the second mounting groove (12); a cylindrical locking boss (19) is provided at the bottom of the mixing bowl (4), a straight outer wall is cut on one side of the arc-shaped outer wall of the locking boss (19), and transverse locking grooves (18) are provided on the arc-shaped outer wall and the straight outer wall, and the locking tongue (14) is slidably arranged in the transverse locking groove (18).
4. A liquid limit adjustment test device according to claim 1, characterized in that: A rubber ring (17) is provided on the outer wall of the mixing bowl (4) at a position in contact with the mounting seat (5).
5. The liquid limit adjustment test device according to claim 1, characterized in that: It also includes a material retaining eave, wherein a circle of material retaining eaves arranged to be inclined downwards is provided on the outer edge of the cover plate (9).
6. A liquid limit adjustment test device according to claim 1, characterized in that: The testing mechanism comprises an extension base (24), a rotating sleeve (22), a top screw (21) and a testing probe (20); the testing probe (20) comprises a needle bar and a cone head concentrically arranged at the bottom of the needle bar, a scale is arranged on the cone head, an extension base (24) is arranged at the rear side of the mixer base, a rotating sleeve (22) is rotatably mounted on the side of the head directly above the extension base (24), the needle bar of the testing probe (20) is inserted into the rotating sleeve (22), and the needle bar of the testing probe (20) is tightened and limited by a top screw (21) arranged on the wall of the rotating sleeve (22).