CN216747256U - Liquid plastic limit measuring device - Google Patents

Abstract

The utility model provides a liquid plastic limit measuring device. The liquid-plastic limit measuring device comprises a base body, a liquid-plastic limit measuring device and a liquid-plastic limit measuring device, wherein the base body comprises a base, a supporting arm arranged on the base and a control box connected to the supporting arm; the sample placing assembly is arranged on the base and comprises a sample cup; the liquid limiting cone is arranged on the control box, and can freely fall into the sample cup relative to the control box; and the laser sensor is arranged on the control box and used for detecting the depth of the liquid limiting cone entering the sample in the sample cup. By applying the technical scheme of the utility model, the problem of poor accuracy of the test structure of the liquid level gauge in the prior art can be solved.

Description

Liquid plastic limit measuring device

Technical Field

The utility model relates to the technical field of liquid plastic limit testing devices, in particular to a liquid plastic limit measuring device.

Background

The consistency state of the cohesive soil is respectively in a flowing state, a plastic state, a semi-solid state and a solid state according to different water contents, and the consistency limit of the soil refers to the characteristic water content of the soil in the transition from one state to another state. The consistency limit which is most commonly used in engineering is liquid limit and plastic limit, generally appears in pairs, is used for dividing soil classes, calculating natural consistency and the like, and is a basic physical property index of soil. The liquid limit of the soil refers to the limit water content between the plastic state and the fluid state of the soil.

In the domestic geotechnical test industry, a balance cone method with the mass of 76g and the cone tip angle of 30 degrees is mainly adopted for measuring the liquid limit, and two liquid limits of 10mm and 17mm exist. The liquid limit cone with the mass of 76g and the cone tip angle of 30 degrees is used for penetrating into the uniformly prepared soil paste in a free-fall posture, when the soil penetration depth is just 10mm, the water content of the soil paste is 10mm liquid limit, and when the soil penetration depth is just 17mm, the water content of the soil paste is 17mm liquid limit.

The common liquid limit instrument for domestic geotechnical laboratories comprises an electric simple liquid limit instrument, a photoelectric liquid-plastic limit combined measuring instrument and a digital soil liquid-plastic limit combined measuring instrument. Although the simple liquid limit instrument has low price and simple structure, the liquid limit cone reticle of the simple liquid limit instrument easily causes errors to influence the precision, has high requirement on operators and is not suitable for the liquid plastic limit combined determination method; the photoelectric liquid-plastic limit combined tester can amplify the glass scale through the optical system and display the glass scale on the screen, the test precision is higher, but the test result display is not visual, the optical focusing zero-setting process is complicated, the liquid limit cone provided with the glass scale is fragile, and the scribing precision is not controllable; although the digital display liquid-plastic limit combined tester is simple and convenient to operate and visual in test data display, the built-in guide rod structure causes friction resistance in the falling process of the liquid limit cone and can not keep a free falling body to fall, so that the test result has deviation and the measurement repeatability is poor; the liquid limit cone cannot be disassembled, so that the operation is inconvenient in the test process, the liquid limit cup and the like easily cause abrasion to the cone tip, and the quality calibration of the liquid limit cone cannot be realized in real time.

Therefore, various liquid level meters in the related art have certain deviation due to the design of the liquid level meters in the testing process, and the accuracy of the measuring result is poor.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a liquid plastic limit measuring device to solve the problem that a liquid limit instrument in the prior art is poor in accuracy of a test structure.

In order to achieve the above object, the present invention provides a liquid plastic limit measuring apparatus comprising: the base body comprises a base, a supporting arm arranged on the base and a control box connected to the supporting arm; the sample placing assembly is arranged on the base and comprises a sample cup; the liquid limiting cone is arranged on the control box, and can freely fall into the sample cup relative to the control box; and the laser sensor is arranged on the control box and used for detecting the depth of the liquid limiting cone entering the sample in the sample cup.

Further, liquid limit awl includes cone portion and connecting portion, and the control box includes: the box body is internally provided with a detection control circuit; the electromagnet is arranged in the box body and is electrically connected with the power supply element; the electromagnet is provided with a mounting hole, the connecting part is inserted into the mounting hole, and the power-on and power-off control liquid limiting cone of the electromagnet is static in the mounting hole or is separated from the mounting hole.

Furthermore, the electromagnet is provided with a testing position for releasing the liquid limit cone and an avoiding position for avoiding the laser sensor, the height of the testing position and the avoiding position in the vertical direction is the same, when the electromagnet is positioned at the testing position, the electromagnet is positioned under the laser sensor, the liquid plastic limit measuring device further comprises a pushing assembly for switching the electromagnet between the testing position and the avoiding position, and the pushing assembly is connected between the box body and the electromagnet.

Further, the pushing assembly includes: the linear guide rail is connected with the box body and extends in the horizontal direction; the sliding block is arranged on the electromagnet and connected with the linear guide rail, and the sliding block is movably arranged in the linear guide rail; and the electromagnetic push rod is arranged between the electromagnet and the box body and pushes the electromagnet to linearly move along the linear guide rail.

Further, the sample cup is for the movably setting of base in vertical direction, is equipped with the mounting hole on the base, and the subassembly is placed to the sample includes: the supporting rod is inserted in the mounting hole; the cup seat is arranged on the supporting rod, and the sample cup is positioned in the cup seat; the transmission structure is connected between the supporting rod and the base and drives the supporting rod to rise or retract in the mounting hole so as to adjust the distance between the sample cup and the liquid limit cone.

Further, transmission structure includes regulating wheel and the worm wheel of being connected with the regulating wheel, and the regulating wheel setting is on the base, and regulating wheel and bracing piece are connected to the worm wheel.

Furthermore, a containing seat is further arranged on the base, and a taper hole used for containing the liquid limiting taper is formed in the containing seat.

Further, the containing seat includes the body of rod of being connected with the base and sets up the plastic seat at body of rod tip, and the taper hole is located the plastic seat.

Furthermore, the measuring device also comprises a leveling component, the leveling component is arranged on the base, and the leveling component displays and adjusts the horizontal state of the base.

Further, the leveling assembly includes: the supporting legs are arranged at the bottom of the base, and the supporting heights of the supporting legs are adjustably arranged; the horizontal display window is arranged on the upper surface of the base, and display liquid drops are arranged in the horizontal display window.

Furthermore, the measuring device also comprises a display screen arranged on the control box, and the display screen is electrically connected with the laser sensor.

Further, the liquid limit awl still includes the counter weight structure of setting on the cone portion, and the counter weight structure includes the extension rod of being connected with the cone portion and sets up the balancing weight in the extension rod bottom.

By applying the technical scheme of the utility model, the laser sensor is arranged, and the laser sensor can detect the depth of the free falling body of the liquid limiting cone entering the sample in the sample cup, so that on the basis of ensuring the free falling body of the liquid limiting cone, the accuracy of the detection data is ensured, the reading error caused by the problems of groove error of the liquid limiting cone or the reduction of a non-free falling body mode and the like in the related technology is avoided, and the test process is simplified.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows a schematic structural view of an embodiment of a liquid plastic limit measurement device according to the present invention; and

fig. 2 shows a schematic view of the pushing assembly of fig. 1.

Wherein the figures include the following reference numerals:

1. a detection control circuit; 2. a control box; 3. an electromagnetic push rod; 4. a linear guide rail; 41. a slider; 5. a support arm; 6. a balancing weight; 7. a storage seat; 71. a rod body; 72. a plastic seat; 8. a base; 9. a worm gear; 10. supporting legs; 11. a lead screw; 12. an adjustment wheel; 13. a horizontal display window; 14. a sample placement assembly; 141. a support bar; 142. a cup holder; 15. a sample cup; 16. liquid limiting cone; 161. a cone portion; 162. a connecting portion; 17. an electromagnet; 18. a display screen; 19. a laser sensor.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1, the present embodiment provides a liquid confinement measurement apparatus including a substrate, a sample placement module 14, a liquid confinement cone 16, and a laser sensor 19. The base body comprises a base 8, a supporting arm 5 arranged on the base 8 and a control box 2 connected to the supporting arm 5; the sample placing assembly 14 is arranged on the base 8, and the sample placing assembly 14 comprises a sample cup 15; the liquid limiting cone 16 is arranged on the control box 2, and the liquid limiting cone 16 can freely fall into the sample cup 15 relative to the control box 2; the laser sensor 19 is provided on the control box 2, and the laser sensor 19 detects the depth of the liquid limit cone 16 into the sample in the sample cup 15.

In this embodiment, due to the arrangement of the laser sensor 19, the laser sensor 19 can detect the depth of the liquid limiting cone 16 which freely falls into the sample in the sample cup 15, so that on the basis of ensuring that the liquid limiting cone 16 can freely fall, the accuracy of detection data is ensured, reading errors caused by problems such as reticle errors of the liquid limiting cone or reduction of a non-free falling mode in the related art are avoided, and the test process is simplified.

It should be noted that the laser sensor 19 in the present embodiment is a laser displacement sensor.

As shown in fig. 1, in the present embodiment, the liquid limiting cone 16 includes a cone portion 161 and a connecting portion 162, the control box 2 includes a box body and an electromagnet 17, and a detection control circuit is arranged in the box body; the electromagnet 17 is arranged in the box body and is electrically connected with the power supply element; wherein, the electromagnet 17 is provided with a jack, the connecting part 162 is inserted in the jack, and the power-on and power-off control liquid limiting cone 16 of the electromagnet 17 is static in the jack or is separated from the jack.

Specifically, there is a jack in the electro-magnet 17, and this jack is the adsorption hole, and the diameter of 16 tops of liquid limit awl is less than the adsorption hole lower extreme diameter slightly, makes 16 tops of liquid limit awl can just put into the adsorption hole of electro-magnet 17, can realize the fixed and release function of liquid limit awl 16 to guarantee the free falling body state of liquid limit awl 16 in the process of falling.

The free fall of no initial velocity of liquid limit awl 16 has been realized to the setting of above-mentioned structure, has further improved the accuracy of test data.

It should be noted that the insertion holes in this embodiment may be through holes or blind holes.

As shown in fig. 1 and 2, in the present embodiment, the electromagnet 17 has a test position for releasing the liquid limit cone 16 and an avoidance position for avoiding the laser sensor 19, the test position and the avoidance position are the same in height in the vertical direction, when the electromagnet 17 is in the test position, the electromagnet 17 is located directly below the laser sensor 19, and the liquid-plastic limit measuring apparatus further includes a pushing assembly for switching the electromagnet 17 between the test position and the avoidance position, the pushing assembly being connected between the tank and the electromagnet 17.

Due to the fact that the pushing assembly is arranged, when the liquid limiting cone 16 needs to fall freely, the electromagnet 17 is pushed to the testing position above the sample placing assembly 14 by the pushing assembly, after the movement of the free falling body is completed, the electromagnet 17 is retracted to the avoiding position, the detection angle of the laser sensor 19 cannot be affected by the electromagnet 17, and the accuracy of the detection structure of the laser sensor 19 is guaranteed.

As shown in fig. 2, in the present embodiment, the pushing assembly includes a linear guide 4, a slider 41, and an electromagnetic pusher 3. The linear guide rail 4 is connected with the box body, and the linear guide rail 4 extends in the horizontal direction; the slide block 41 is arranged on the electromagnet 17 and connected with the linear guide rail 4, and the slide block 41 is movably arranged in the linear guide rail 4; the electromagnetic push rod 3 is arranged between the electromagnet 17 and the box body, and the electromagnetic push rod 3 pushes the electromagnet 17 to move linearly along the linear guide rail 4.

Specifically, the linear guide 4 is installed on one side of the measuring position, and is provided with a sliding block 41, one end of the sliding block 41 is fixed on the electromagnetic push rod 3, and the other end is connected with the electromagnet 17, so that the electromagnet 17 can move linearly on the linear guide 4 through the electromagnetic push rod 3 and the sliding block 41. When the electromagnet 17 needs to adsorb the liquid limiting cone 16, the electromagnetic push rod 3 is electrified, the sliding block 41 and the electromagnet 17 are pushed to a measuring position along the linear guide rail 4, and after the electromagnet 17 releases the liquid limiting cone 16, the sliding block 41 and the electromagnet 17 are pulled back to an initial position along the linear guide rail 4. This prevents the electromagnet 17 from blocking the measurement of the laser sensor 19, and prevents the laser sensor 19 from being able to measure or from generating a measurement error.

The structure is simple, the control precision is high, and the test operation is convenient.

As shown in fig. 1, in the present embodiment, the sample cup 15 is movably disposed in a vertical direction with respect to the base 8, the base 8 is provided with a mounting hole, and the sample placing assembly 14 includes: a support rod 141 inserted into the mounting hole; a cup holder 142 disposed on the support rod 141, wherein the sample cup 15 is located in the cup holder 142; and the transmission structure is connected between the support rod 141 and the base 8, and drives the support rod 141 to rise or retract in the mounting hole so as to adjust the distance between the sample cup 15 and the liquid limiting cone 16.

Through the arrangement, the distance between the sample cup 15 and the liquid limit cone 16 is adjusted, the test requirements of different conditions can be met, the applicability is wide, the structure is simple, and the adjustment operation is convenient.

As shown in fig. 1, in the present embodiment, the transmission structure includes an adjusting wheel 12 and a worm wheel 9 connected to the adjusting wheel 12, the adjusting wheel 12 is disposed on the base 8, and the worm wheel 9 connects the adjusting wheel 12 and the support rod 141.

Specifically, the adjusting wheel 12 and the worm wheel 9 can make the cup holder 142 ascend and descend through the lifting screw rod 11, the adjusting precision is high, and the experiment requirements can be met.

As shown in fig. 1, in the present embodiment, the base 8 is further provided with a storage seat 7, and the storage seat 7 is provided with a tapered hole for accommodating the liquid limiting cone 16.

Owing to set up storage seat 7 to can accomodate liquid limit awl 16 to storage seat 7 after accomplishing test on, prevent that awl point wearing and tearing or liquid limit awl from putting indiscriminately and losing, improve the life of liquid limit awl 16, and guaranteed the measuring accuracy of liquid limit awl.

Preferably, the receptacle 7 includes a rod 71 connected to the base 8 and a plastic seat 72 disposed at an end of the rod 71, and the taper hole is located in the plastic seat 72.

As shown in fig. 1, in this embodiment, the measuring apparatus further includes a leveling component, which is disposed on the base 8 and displays and adjusts the level state of the base 8.

Specifically, the leveling assembly includes: the supporting feet 10 are arranged at the bottom of the base 8, and the supporting height of the supporting feet 10 can be adjustably arranged; the horizontal display window 13 is arranged on the upper surface of the base 8, and display liquid drops are arranged in the horizontal display window 13.

Before the test is started, the horizontal display bubble in the horizontal display window 13 is centered by adjusting the supporting feet 10, so that the instrument leveling is realized. The operation can ensure that the liquid plastic limit measuring device has high precision and accurate data measurement when in use.

As shown in fig. 1, in the present embodiment, the measuring apparatus further includes a display 18 provided on the control box 2, and the display 18 is electrically connected to the laser sensor 19.

The digital display of the test data is realized by the arrangement, the reading and the recording are convenient, and the use experience of a user is improved.

As shown in fig. 1, in the present embodiment, the liquid limiting cone 16 further includes a counterweight structure disposed on the cone portion 161, and the counterweight structure includes an extension rod connected to the cone portion 161 and a counterweight 6 disposed at the bottom of the extension rod.

As the balancing weight 6 is arranged on the cone part 161, the gravity center of the liquid limit cone 16 is lower, the liquid limit cone 16 is ensured not to incline or shift when falling freely, and the accuracy of the test result is further ensured.

The method of using the liquid plastic limit measuring device of the embodiment is as follows:

before the test is started, the horizontal display window 13 is centered through the supporting feet 10, and the instrument is leveled; placing the sample cup 15 filled with the soil paste on a cup seat 142, opening a switch of an electromagnetic push rod 3, pushing an electromagnet 17 to a measuring position along a guide rail linear guide rail 4, electrifying the electromagnet 17 to generate magnetic force, placing the top end part of a liquid limit cone 16 into a groove of the electromagnet 17, sucking the liquid limit cone 16 by the electromagnet 17, adjusting an adjusting wheel 12 to enable the sample cup 15 to slowly rise, when a detection control circuit 1 detects that the surface of the soil paste in the sample cup is just contacted with the cone tip, firstly resetting the numerical value of a laser sensor 19 to zero and starting a 5-second timing function, simultaneously cutting off a power supply of the electromagnet 17, enabling the magnetic force of the electromagnet 17 to disappear, enabling the liquid limit cone 16 to be separated from the electromagnet 17 and fall into the soil paste freely under the action of gravity, then cutting off the power supply of the electromagnetic push rod 3, enabling the electromagnet 17 to horizontally slide along the linear guide rail 4 to the initial position and be far away from the measuring hole range of the laser sensor 19, after the timing is finished, the numerical value of the depth of the soil collected by the laser sensor 19 is displayed on the liquid crystal display 18.

The technical scheme is as follows:

the liquid plastic limit measuring device comprises an electromagnetic push rod 3, a linear guide rail 4, a laser sensor 19, an electromagnet 17, a detection control circuit 1, a liquid crystal display screen 18 and the like, so that the purposes of measuring the soil penetration depth of the liquid limit cone 16, converting signals and displaying data by utilizing a laser ranging principle are achieved.

An adsorption hole is formed in the electromagnet 17, the diameter of the top end of the liquid limiting cone 16 is slightly smaller than the diameter of the lower end of the adsorption hole, so that the top end of the liquid limiting cone 16 can be just placed into the adsorption hole of the electromagnet 17, the fixing and releasing functions of the liquid limiting cone 16 can be realized, and the free falling state of the liquid limiting cone 16 in the falling process is ensured;

the linear guide 4 is arranged at the rear side of the measuring position and is provided with a sliding block 41, one end of the sliding block 41 is fixed on the electromagnetic push rod, the other end is connected with the electromagnet 17, and the electromagnet 17 can linearly move on the linear guide 4 through the electromagnetic push rod 3 and the sliding block 41. When the electromagnet 17 needs to adsorb the liquid limiting cone 16, the electromagnetic push rod 3 is electrified, the sliding block 41 and the electromagnet 17 are pushed to a measuring position along the linear guide rail 4, and after the electromagnet 17 releases the liquid limiting cone 16, the sliding block 41 and the electromagnet 17 are pulled back to an initial position along the linear guide rail 4. This prevents the electromagnet 17 from blocking the measurement position, which would make the laser sensor 19 impossible to measure or cause measurement errors.

The liquid limit cone 16 independently exists, and the type adopts a conventional balance block structure; set up the storage seat 7 that a top was wrapped up by rubber on the liquid limit appearance mesa, can put into this cylinder with the awl point of liquid limit awl 16, avoid the awl point wearing and tearing.

The shell of the combined determinator is grounded, the bottom end of a measuring hole and an electromagnetic push rod 3 are separated and fixed by insulating materials, a high-level voltage is applied to the measuring hole, when a liquid limit cone 16 is placed in the combined determinator, the high-level voltage is also applied, when a detection sample in a sample cup 15 is in contact with the cone tip of the liquid limit cone 16, the voltage at the bottom end of the measuring hole is pulled down, a detection control circuit 1 is triggered and controlled to execute corresponding actions, and therefore automatic zeroing and automatic cone discharging control of the numerical value of a laser sensor 19 are achieved.

The cup base 142 can ascend and descend through the lifting screw rod 11 by the adjusting wheel 12 and the worm wheel 9; the supporting feet 10 and the horizontal display window 13 are used for equipment leveling.

And a data acquisition system is configured, after the liquid limit cone 16 enters the soil, the data acquisition system can acquire data every 10ms, draw a relation curve between the depth of the soil and time, study the change trend of different types of soil on the resistance of the liquid limit cone 16 and guide a new study direction for a soil type division method.

The technical scheme of the embodiment is realized by the following modes:

the measuring system of the liquid-plastic limit combined determinator with the electromagnetic falling cone type laser sensor consists of an electromagnetic push rod 3, a laser sensor, an electromagnet, a detection control circuit and a liquid crystal display screen, and can realize the measurement and digital display of the penetration depth of a liquid limit cone by adopting a high-precision laser sensor;

an electromagnet of the liquid-plastic limit joint tester of the electromagnetic falling cone type laser sensor is connected with the linear guide rail through a sliding block, and can horizontally slide along the linear guide rail while playing a role in fixing and releasing a liquid limit cone;

the liquid limit cone of the electromagnetic falling cone type laser sensor liquid-plastic limit combined tester is separated independently, is easy to clean and operate, and can be calibrated in real time.

The liquid limiting cone of the electromagnetic falling cone type laser sensor liquid-plastic limit combined tester is provided with a special storage support, which is beneficial to the storage and protection of the liquid limiting cone.

The voltage difference between the liquid limit cone and the sample cup is detected to be used as a trigger signal of subsequent detection control.

The technical scheme of the embodiment has the following advantages:

1. the electromagnet controls the fixing and releasing of the liquid limiting cone, so that the liquid limiting cone has no resistance in the falling process, the free falling posture can be kept, and the test accuracy is ensured;

2. the independent liquid limit cone enables the test operation to be more convenient and fast, and reduces the probability of abrasion to the cone tip;

3. the high-precision laser sensor and the data acquisition system can realize real-time acquisition of the penetration depth of the liquid limit cone, draw a relation curve of the penetration depth and time, study the change trend of different types of soil on the resistance of the liquid limit cone, and guide a new study direction for the classification method of soil types.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

due to the fact that the laser sensor is arranged, the laser sensor can detect the depth of the liquid limit cone in the sample entering the sample cup, accuracy of detection data is guaranteed on the basis that the liquid limit cone can fall freely, reading errors caused by problems that a scribing error or a non-free falling mode of the liquid limit cone in the related technology is reduced and the like are avoided, and the testing process is simplified.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A liquid plastic limit measuring device, comprising:

the base body comprises a base (8), a supporting arm (5) arranged on the base (8) and a control box (2) connected to the supporting arm (5);

a specimen placement assembly (14) disposed on the base (8), the specimen placement assembly (14) including a specimen cup (15);

a liquid limiting cone (16) arranged on the control box (2), wherein the liquid limiting cone (16) can freely fall into the sample cup (15) relative to the control box (2);

and a laser sensor (19) which is provided on the control box (2), wherein the laser sensor (19) detects the depth of the liquid limit cone (16) entering the sample in the sample cup (15).

2. The liquid-plastic limit determination device according to claim 1, wherein the liquid limit cone (16) comprises a cone portion (161) and a connecting portion (162), and the control box (2) comprises:

the detection device comprises a box body, wherein a detection control circuit (1) is arranged in the box body;

the electromagnet (17) is arranged in the box body and is electrically connected with the power supply element;

the electromagnet (17) is provided with a mounting hole, the connecting part (162) is inserted into the mounting hole, and the electromagnet (17) is controlled to be switched on and off to control the liquid limiting cone (16) to be static in the mounting hole or to be separated from the mounting hole.

3. The liquid-plastic limit measuring device according to claim 2, wherein the electromagnet (17) has a test position for releasing the liquid limit cone (16) and an avoidance position for avoiding the laser sensor (19), the test position and the avoidance position being the same in height in a vertical direction, the electromagnet (17) being located directly below the laser sensor (19) when the electromagnet (17) is in the test position, the liquid-plastic limit measuring device further comprising a pushing assembly for switching the electromagnet (17) between the test position and the avoidance position, the pushing assembly being connected between the case and the electromagnet (17).

4. The liquid plastic limit measurement device of claim 3, wherein the push assembly comprises:

the linear guide rail (4) is connected with the box body, and the linear guide rail (4) extends in the horizontal direction;

the sliding block (41) is arranged on the electromagnet (17) and connected with the linear guide rail (4), and the sliding block (41) is movably arranged in the linear guide rail (4);

the electromagnetic push rod (3) is arranged between the electromagnet (17) and the box body, and the electromagnetic push rod (3) pushes the electromagnet (17) to linearly move along the linear guide rail (4).

5. The liquid plastic limit measurement device according to claim 1, wherein the sample cup (15) is disposed movably in a vertical direction with respect to the base (8), the base (8) is provided with a mounting hole, and the sample placement module (14) includes:

the supporting rod (141) is inserted into the mounting hole;

a cup holder (142) arranged on the support rod (141), the sample cup (15) being located in the cup holder (142);

the transmission structure is connected between the supporting rod (141) and the base (8), and the transmission structure drives the supporting rod (141) to rise or retract in the mounting hole so as to adjust the distance between the sample cup (15) and the liquid limit cone (16).

6. The liquid plastic limit measurement device according to claim 5, wherein the transmission structure comprises an adjusting wheel (12) and a worm wheel (9) connected with the adjusting wheel (12), the adjusting wheel (12) is arranged on the base (8), and the worm wheel (9) is connected with the adjusting wheel (12) and the support rod (141).

7. The liquid-plastic limit measuring device according to claim 1, wherein the base (8) is further provided with a receiving seat (7), and the receiving seat (7) is provided with a taper hole for accommodating the liquid limit taper (16).

8. The liquid plastic limit measurement device of claim 7, wherein the receptacle (7) comprises a rod (71) connected to the base (8) and a plastic seat (72) disposed at an end of the rod (71), and the taper hole is located in the plastic seat (72).

9. The liquid plastic limit measurement device of claim 1, further comprising a leveling component disposed on the base (8), the leveling component displaying and adjusting a level of the base (8).

10. The liquid plastic limit measurement device of claim 9, wherein the leveling assembly comprises:

the supporting legs (10) are arranged at the bottom of the base (8), and the supporting heights of the supporting legs (10) are adjustably arranged;

the horizontal display window (13) is arranged on the upper surface of the base (8), and display liquid drops are arranged in the horizontal display window (13).

11. The liquid plastic limit measurement device of claim 1, further comprising a display screen (18) disposed on the control box (2), the display screen (18) being electrically connected to the laser sensor (19).

12. The liquid-plastic limit measuring device according to claim 2, wherein the liquid limit cone (16) further comprises a counterweight structure arranged on the cone portion (161), and the counterweight structure comprises an extension rod connected with the cone portion (161) and a counterweight block (6) arranged at the bottom of the extension rod.

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