Stirring head for geotechnical experiment

Abstract

The utility model relates to equipment for civil experiments, and discloses a stirring head for geotechnical experiments, which comprises a stirring head main body, a first scraper blade, a second scraper blade, a third scraper blade and a stirrer, the front end surface of the stirring head main body is a stirring surface; the first scraping plate divides the stirring surface into a first stirring area and a second stirring area on the stirring surface, and the first scraping plate comprises a first scraping surface facing the first stirring area and a second scraping surface facing the second stirring area; the first scraping surface and the second scraping surface are connected with each other, the first scraping surface and the second scraping surface are both connected with the stirring surface, an included angle between the first scraping surface and the stirring surface is larger than an included angle between the second scraping surface and the stirring surface, and the stirring rod is fixedly connected with the stirring head main body and drives the stirring head main body to stir a soil sample. And different scraping plates stir different soil samples along with the change of the stirring mode, so that the problem that the stirring head in the prior art cannot uniformly stir soil samples with different sizes and complicated types is solved.

Description

Technical Field

[0001] This utility model relates to equipment for geotechnical experiments, and in particular to a mixing head for geotechnical experiments. Background Technology

[0002] As a core component of mixing equipment, the design of the mixing head directly affects mixing efficiency and product quality.

[0003] Currently, there are various types of stirring heads on the market, each with its unique technical characteristics and application scenarios. For example, spiral stirring heads use spiral blades rotating within a container to create complex motions in the materials, achieving mixing and homogenization, and are widely used in food processing, chemical, and pharmaceutical industries. Paddle stirring heads, on the other hand, use blades rotating in the liquid to generate shear, tangential, and radial forces, achieving mixing and homogenization of the liquid, and are commonly found in the pharmaceutical, chemical, and bioengineering industries.

[0004] In geotechnical experiments, the volume of soil samples that need to be stirred is very small, and the size and type of soil samples used in the experiment are quite complex. During stirring, it is necessary to stir the fine soil particles in the larger soil samples evenly, and to stir the experimental soil samples with a certain degree of viscosity, including various components such as silt, silty soil, silty clay, clay and silt, into a uniform paste. Therefore, it is not possible to directly use existing stirring heads to stir the soil samples used in geotechnical experiments. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a mixing head for geotechnical experiments, which solves the problem that existing mixing heads cannot uniformly mix experimental soil samples of different sizes and complex types.

[0006] To solve the above-mentioned technical problems, this utility model provides a mixing head for geotechnical experiments, the mixing head comprising:

[0007] The stirring head body has a front end face that serves as the stirring surface.

[0008] The first scraper is disposed on the mixing surface and divides the mixing surface into a first mixing area and a second mixing area. The first scraper includes a first scraping surface and a second scraping surface that are driven by the mixing head body to mix the soil sample.

[0009] The first scraping surface faces the first stirring area, the second scraping surface faces the second stirring area, one side of the first scraping surface is connected to one side of the second scraping surface to form a scraper, the other side of the first scraping surface and the other side of the second scraping surface are far apart from each other and connected to the stirring surface, and the angle between the first scraping surface and the stirring surface is greater than the angle between the second scraping surface and the stirring surface.

[0010] The second scraper is disposed on the stirring surface and located within the first stirring area. One end of the second scraper is connected to the middle position of the first scraper, and the other end of the second scraper extends towards the edge of the stirring surface.

[0011] The third scraper is disposed on the stirring surface and located in the second stirring area. One end of the third scraper is connected to the middle position of the first scraper, and the other end of the third scraper extends towards the edge of the stirring surface.

[0012] A stirring rod is fixedly connected to the rear end of the stirring head body, and the stirring rod is used to drive the stirring head body to move back and forth or rotate.

[0013] As an optional feature, both the second and third scrapers are arc-shaped plates, and both the second and third scrapers are bent toward the same side of the rotation direction of the stirring head body.

[0014] As an option, the first scraper, the second scraper, and the third scraper have the same maximum height in the front-to-back direction.

[0015] As an optional solution, a number of stirring strips are provided on the peripheral sidewall of the stirring head body, and the stirring strips are used to assist in stirring the soil sample.

[0016] As an optional embodiment, the stirring bar is an inclined rib, with the front end of the inclined rib flush with the front end of the peripheral sidewall of the stirring head body, and the rear end of the inclined rib flush with the rear end of the peripheral sidewall of the stirring head body.

[0017] As an alternative, a plurality of the stirring bars are arranged circumferentially along the stirring head body and the distance between adjacent stirring bars is equal.

[0018] As an optional solution, the stirring head body is a cylindrical shape with an open rear end. The stirring head body is provided with a first fixing ring and a second fixing ring inside. The outer periphery of the first fixing ring is provided with a plurality of connecting rods that connect to the inner side of the peripheral sidewall of the stirring head body. The first fixing ring is fixedly connected to the rear end face of the stirring head body through the connecting rods. The second fixing ring is fixedly disposed on the bottom wall of the stirring head body located on the inner side.

[0019] The stirring rod passes through the first fixing ring and the second fixing ring in sequence, and the stirring rod is fixedly connected to the first fixing ring and the second fixing ring.

[0020] Alternatively, the front end of the stirring rod is threadedly connected to the second retaining ring, and the stirring rod is fixedly connected to the first retaining ring by screws.

[0021] As an optional option, the stirring surface of the stirring head body is made of metal.

[0022] Compared with the prior art, the mixing head for geotechnical experiments according to this embodiment of the invention has the following advantages: the angle between the first scraping surface of the first scraper and the mixing surface is greater than the angle between the second scraping surface and the mixing surface, resulting in different inclination angles between the first and second scraping surfaces. When the mixing head body rotates and mixes the soil sample under the action of the mixing rod, the first scraping surface scrapes and mixes the soil sample with a certain hardness under the action of the mixing head body, while the second scraping surface scrapes the soil sample with a certain viscosity onto the second scraping surface under the action of the mixing head body. During the mixing process, the soil sample with a certain viscosity gradually deposits downwards under the action of the gently tilting second scraping surface from light to heavy shoveling and gravity. At this time, the second scraping surface... The sample is gradually spread and stirred. A second scraper, positioned within the first stirring area, guides the movement of the soil sample by its shape while scraping the surface soil, thus extending or reducing the time the soil sample remains in the first stirring area. A third scraper, positioned within the second stirring area, also guides the movement of the soil sample by its shape, further extending or reducing the time the soil sample remains in the second stirring area. As the stirring head moves forward and backward, its stirring surface hammers the soil sample, breaking up large pieces of soil and rock. This process completes the stirring of soil samples of different shapes and sizes, thereby solving the problem that existing stirring heads cannot evenly stir experimental soil samples of different sizes and complex types. Attached Figure Description

[0023] Figure 1 This is an overall schematic diagram of the mixing head of this utility model used in geotechnical experiments;

[0024] Figure 2 This is a schematic diagram of the internal structure of the mixing head used in geotechnical experiments according to this utility model;

[0025] Figure 3 This is a side view of the mixing head of this utility model used in geotechnical experiments;

[0026] Figure 4 This utility model relates to a mixing head used in geotechnical experiments. Figure 3 A magnified view of a section at point A;

[0027] In the figure, 1 is the main body of the stirring head; 101 is the stirring surface; 1011 is the first stirring area; 1012 is the second stirring area; 2 is the first scraper; 201 is the first scraping surface; 202 is the second scraping surface; 203 is the scraper blade; 3 is the second scraper; 4 is the third scraper; 5 is the stirring rod; 501 is the external thread; 6 is the stirring bar; 7 is the first fixing ring; 701 is the connecting hole; 702 is the connecting rod; 8 is the second fixing ring; 801 is the internal thread. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] like Figures 1 to 3 As shown, this utility model provides a mixing head for geotechnical experiments, the mixing head comprising: a mixing head body 1, a first scraper 2, a second scraper 3, a third scraper 4, and a mixing rod 5.

[0030] The front end face of the mixing head body 1 is the mixing surface 101. The mixing head body 1 is cylindrical in shape. The mixing head body 1 mixes soil samples in a matching mixing container.

[0031] The first scraper 2 is disposed on the mixing surface 101, and the first scraper 2 divides the mixing surface 101 into a first mixing area 1011 and a second mixing area 1012. The first scraper 2 is arranged radially along the mixing head body 1 and the length of the first scraper 2 is equal to the diameter of the mixing surface 101. The first scraper 2 includes a first scraping surface 201 and a second scraping surface 202 that are driven by the mixing head body 1 to mix the soil sample.

[0032] The first scraping surface 201 faces the first stirring area 1011, and the second scraping surface 202 faces the second stirring area 1012. One side of the first scraping surface 201 connects with one side of the second scraping surface 202 to form a scraper blade 203, which faces the front of the stirring head body 1, thereby making the cross-section of the first scraper 2 triangular. The other side of the first scraping surface 201 and the other side of the second scraping surface 202 are far apart from each other and connected to the stirring surface 101, and the first scraping surface... The angle between the first scraping surface 201 and the stirring surface 101 is greater than the angle between the second scraping surface 202 and the stirring surface 101. The angle between the first scraping surface 201 and the stirring surface 101 is α, and the angle between the second scraping surface 202 and the stirring surface 101 is β, i.e., α > β. Therefore, the scraper blade 203 is tilted toward one side of the stirring surface 101. The first scraping surface 201 rotates with the stirring head body 1 and scrapes the soil sample. The second scraping surface 202 rotates with the stirring head body 1 and spreads the soil sample evenly.

[0033] When the stirring head body 1 spins, since the center of rotation is located at the axis of the stirring head body 1, the first scraping surface 201 and the second scraping surface 202 simultaneously stir the soil samples they contact. The first scraping surface 201, with the center of rotation as the dividing point, has one section as the first advancing side and the other as the first retreating side. Because the orientation of the first advancing side is consistent with the rotation direction of the stirring head body 1 and the slope of the first advancing side is relatively steep, the first advancing side contacts the soil sample with a certain hardness and scrapes the corresponding soil sample forward as it moves with the stirring head body 1. The orientation of the first retreating side is opposite to the rotation direction of the stirring head body 1, thus not interfering with the movement state of the corresponding soil sample; the second scraping surface 202... 02 Taking the center of rotation as the dividing point, one section is the second forward side and the other section is the second backward side. When the second forward side moves with the stirring head body 1, it contacts the soil sample and scrapes the soil sample. Since the boundary of the second forward side in contact with the stirring surface 101 is oriented in the same direction as the rotation direction of the rotating head and the slope of the second forward side is relatively gentle, when the second forward side scrapes the soil sample, it will scrape the soil sample with a certain viscosity onto the second scraping surface 202. The soil sample with a certain viscosity on the second scraping surface 202 will slowly fall into the stirring container due to gravity. At this time, the scraper 203 formed by the first scraping surface 201 and the second scraping surface 202 will gradually spread the soil sample with a certain viscosity evenly during stirring.

[0034] The second scraper 3 and the third scraper 4 are both disposed on the mixing surface 101. The second scraper 3 is located in the first mixing area 1011, and the third scraper 4 is located in the second area. One end of the second scraper 3 is connected to the middle position of the first scraper 2, and the other end of the second scraper 3 extends towards the edge of the mixing surface 101. One end of the third scraper 4 is connected to the middle position of the first scraper 2, and the other end of the third scraper 4 extends towards the edge of the mixing surface 101. The second scraper 3 and the third scraper 4 can assist the first scraper 2 in mixing the soil sample.

[0035] The stirring rod 5 is fixedly connected to the rear end of the stirring head body 1. The stirring rod 5 is fixedly connected to the motor shaft. The motor on the motor shaft drives the stirring rod 5 to rotate or move back and forth, thereby enabling the stirring head to rotate or move back and forth and complete the stirring action.

[0036] Based on this, the mixing head body 1 is provided with a first scraper 2, a second scraper 3, and a third scraper 4. The first scraper 2 divides the mixing surface 101 into a first mixing area 1011 and a second mixing area 1012. The first scraper 2 includes a first scraping surface 201 and a second scraping surface 202. The angle between the first scraping surface 201 and the mixing surface 101 is greater than the angle between the second scraping surface 202 and the mixing surface 101. The first scraping surface 201 rotates with the mixing head body 1 and scrapes the soil sample. The second scraping surface 202 rotates with the mixing head body 1 and spreads the soil sample evenly. The second scraper 3 and the third scraper 4 assist the first scraper 2 in mixing the soil sample in the first mixing area 1011 and the second mixing area 1012, respectively. The mixing rod 5 provides power for the mixing action of the mixing head body 1, thereby solving the problem that existing mixing heads cannot evenly mix experimental soil samples of complex sizes and types.

[0037] Furthermore, such as Figure 1 As shown, both the second scraper 3 and the third scraper 4 are arc-shaped plates, and both the second scraper 3 and the third scraper 4 are bent toward the same side of the rotation direction of the stirring head body 1. The concave side of the second scraper 3 faces the first scraping surface 201, and the concave side of the third scraper 4 faces the second scraping surface 202.

[0038] When the main body 1 of the stirring head rotates clockwise, the second scraper 3 and the third scraper 4 scrape the soil from their respective concave sides. The second scraper 3 and the third scraper 4 guide the soil sample to the concave part of the arc plate and gather it together. At this time, the stirring head stirs the soil sample in a gathering manner.

[0039] When the mixing head body 1 rotates counterclockwise, the second scraper 3 and the third scraper 4 scrape the soil from their respective convex sides. The second scraper 3 and the third scraper 4 guide the soil sample to both ends of the arc plate. At this time, the mixing head performs discrete mixing on the soil sample.

[0040] Furthermore, such as Figure 1 and Figure 3 As shown, the first scraper 2, the second scraper 3, and the third scraper 4 have the same maximum height in the front-to-back direction. The contact surfaces of the second scraper 3 and the third scraper 4 with the soil sample are flush with the scraping blade 203 formed by the connection of the first scraping surface 201 and the second scraping surface 202. Since the scraping blade 203 formed by the first scraping surface 201 and the second scraping surface 202 is relatively thin, it may not be able to scrape off the surface soil when encountering a hard soil sample. At this time, the second scraper 3 and the third scraper 4 serve as the main scraping tools for this type of soil sample.

[0041] Furthermore, such as Figure 1 As shown, a plurality of stirring strips 6 are provided on the peripheral sidewall of the stirring head body 1, and the stirring strips 6 are used to assist in stirring the soil sample.

[0042] One end of the stirring bar 6 is fixedly connected to the side wall of the stirring head body 1, and the other end of the stirring bar 6 extends into the soil sample. The stirring bar 6 rotates around the axis of the stirring head body 1 under the drive of the stirring head body 1. When the stirring bar 6 moves, it drives the soil sample to move. The stirring bar 6 assists in stirring the soil sample under the drive of the stirring head body 1, so that the stirring head body 1 can stir the soil sample that is not on the stirring surface 101, thereby enhancing the stirring effect of the stirring head.

[0043] Furthermore, such as Figure 1 As shown, the stirring bar 6 is an inclined rib with an inclination angle between 0° and 90°. The front end of the inclined rib is flush with the front end of the peripheral sidewall of the stirring head body 1, and the rear end of the inclined rib is flush with the rear end of the peripheral sidewall of the stirring head body 1. When the inclined rib moves with the stirring head body 1, it can stir the soil sample located on the sidewall of the stirring container along its guiding direction.

[0044] Furthermore, such as Figure 1 As shown, several stirring bars 6 are arranged around the circumference of the stirring head body 1 and the distance between adjacent stirring bars 6 is equal. The uniform arrangement of several stirring bars 6 is beneficial to the stirring of the soil sample, so that the stirring force of the stirring head is consistent in all directions.

[0045] Furthermore, such as Figure 2As shown, the stirring head body 1 is a cylindrical shape with an open rear end. The stirring head body 1 is provided with a first fixing ring 7 and a second fixing ring 8 inside. The outer periphery of the first fixing ring 7 is provided with a plurality of connecting rods 702 that connect to the inner side of the peripheral sidewall of the stirring head body 1. The first fixing ring 7 is fixedly connected to the rear end face of the stirring head body 1 through the connecting rods 702. The second fixing ring 8 is fixedly disposed on the bottom wall of the stirring head body 1 located on the inner side.

[0046] The stirring rod 5 passes through the first fixing ring 7 and the second fixing ring 8 in sequence, and the stirring rod 5 is fixedly connected to the first fixing ring 7 and the second fixing ring 8. The first fixing ring 7 and the second fixing ring 8 provide guidance for the installation of the stirring rod 5.

[0047] Furthermore, such as Figure 2 As shown, the front end of the stirring rod 5 is provided with an external thread 501, and the inner wall of the second fixing ring 8 is provided with an internal thread 801 that mates with the external thread 501. The front end of the stirring rod 5 and the second fixing ring 8 are threadedly connected by the external thread 501 and the internal thread 801.

[0048] Two connecting holes 701 are opened through the side wall of the first fixing ring 7. Screws are connected in the connecting holes 701. At this time, one end of the screw is in contact with the body of the stirring rod 5. The screw and the stirring rod 5 are locked together. Therefore, the stirring rod 5 can be fixedly connected to the first fixing ring 7 through the screw and the connecting holes 701.

[0049] Furthermore, the stirring surface 101 of the stirring head body 1 is made of metal. The stirring rod 5 drives the stirring head body 1 to move back and forth. The stirring head body 1, with its stirring surface 101 made of metal, directly hammers the soil sample. The stirring head body 1 hammers larger soil and stones into soil samples of a suitable size that can be stirred by the first scraper 2, the second scraper 3, and the third scraper 4, thereby enabling the stirring head to stir soil samples of different sizes.

[0050] The working process of this utility model is as follows: The stirring rod 5 is activated, which drives the stirring head body 1, which is fixedly connected to it by a fixing ring, to rotate. The stirring head body 1 stirs the soil sample through the first scraper 2, the second scraper 3, and the third scraper 4 provided on its stirring surface 101. The first scraping surface 201 on the first scraper 2 scrapes the soil sample, and the second scraping surface 202 on the first scraper 2 stirs the soil sample. The second scraper 3 uses its shape to guide the soil sample in the first stirring area 1011, and the third scraper 4 uses its shape to guide the soil sample in the second stirring area 1012. The inclined ribs stir the soil sample located on the side wall of the stirring head body 1. When it is necessary to hammer the soil sample, the stirring rod 5 of the stirring head body 1 is adjusted to reciprocate along its axis, so that the metal stirring surface 101 hammers the soil sample, thereby completing the stirring of soil samples of different types and sizes.

[0051] In summary, this utility model provides a mixing head for geotechnical experiments. The mixing head body 1 is equipped with a first scraper 2. Due to the different angles of the first scraping surface 201 and the second scraping surface 202, the first scraper 2 can perform different mixing actions on the soil sample. The second scraper 3 and the third scraper 4 can guide the movement direction of the soil sample through their shapes, thereby extending or reducing the residence time of the soil sample in the first mixing area 1011 or the second mixing area 1012, increasing its mixing effect, and thus solving the problem that existing mixing heads cannot evenly mix experimental soil samples of complex sizes and types.

[0052] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A mixing head for geotechnical experiments, characterized in that, The stirring head includes: The stirring head body has a front end face that serves as the stirring surface. The first scraper is disposed on the mixing surface and divides the mixing surface into a first mixing area and a second mixing area. The first scraper includes a first scraping surface and a second scraping surface that are driven by the mixing head body to mix the soil sample. The first scraping surface faces the first stirring area, the second scraping surface faces the second stirring area, one side of the first scraping surface is connected to one side of the second scraping surface to form a scraper, the other side of the first scraping surface and the other side of the second scraping surface are far apart from each other and connected to the stirring surface, and the angle between the first scraping surface and the stirring surface is greater than the angle between the second scraping surface and the stirring surface. The second scraper is disposed on the stirring surface and located within the first stirring area. One end of the second scraper is connected to the middle position of the first scraper, and the other end of the second scraper extends towards the edge of the stirring surface. The third scraper is disposed on the stirring surface and located in the second stirring area. One end of the third scraper is connected to the middle position of the first scraper, and the other end of the third scraper extends towards the edge of the stirring surface. A stirring rod is fixedly connected to the rear end of the stirring head body, and the stirring rod is used to drive the stirring head body to move back and forth or rotate.

2. The mixing head for geotechnical experiments according to claim 1, characterized in that, Both the second and third scrapers are arc-shaped plates, and both the second and third scrapers are bent toward the same side of the rotation direction of the stirring head body.

3. A mixing head for geotechnical experiments according to claim 2, characterized in that, The first scraper, the second scraper, and the third scraper have the same maximum height in the front-to-back direction.

4. A mixing head for geotechnical experiments according to claim 1, characterized in that, The mixing head body has several mixing bars on its peripheral sidewalls, which are used to assist in mixing the soil sample.

5. A mixing head for geotechnical experiments according to claim 4, characterized in that, The stirring bar is an inclined rib, with the front end of the inclined rib flush with the front end of the peripheral sidewall of the stirring head body, and the rear end of the inclined rib flush with the rear end of the peripheral sidewall of the stirring head body.

6. A mixing head for geotechnical experiments according to claim 4, characterized in that, Several of the stirring bars are arranged circumferentially along the body of the stirring head, and the distance between adjacent stirring bars is equal.

7. A mixing head for geotechnical experiments according to claim 1, characterized in that, The stirring head body is a cylindrical shape with an open rear end. The stirring head body is provided with a first fixing ring and a second fixing ring inside. The outer periphery of the first fixing ring is provided with a plurality of connecting rods that connect to the inner side of the peripheral sidewall of the stirring head body. The first fixing ring is fixedly connected to the rear end face of the stirring head body through the connecting rods. The second fixing ring is fixedly disposed on the bottom wall of the stirring head body located on the inner side. The stirring rod passes through the first fixing ring and the second fixing ring in sequence, and the stirring rod is fixedly connected to the first fixing ring and the second fixing ring.

8. A mixing head for geotechnical experiments according to claim 7, characterized in that, The front end of the stirring rod is threadedly connected to the second fixing ring, and the stirring rod is fixedly connected to the first fixing ring by screws.

9. A mixing head for geotechnical experiments according to claim 1, characterized in that, The stirring surface of the stirring head body is made of metal.

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