CN216396173U

CN216396173U - Intrinsically safe mixing device for paste quick-setting and solidifying material

Info

Publication number: CN216396173U
Application number: CN202122679004.5U
Authority: CN
Inventors: 鲁义; 邢舜博; 颜晓雯; 彭俊杰; 喻伟涵; 李蓉蓉
Original assignee: Hunan University of Science and Technology
Current assignee: Hunan University of Science and Technology
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-04-29
Anticipated expiration: 2031-11-04

Abstract

The utility model discloses an intrinsically safe mixing device for paste quick-setting consolidation materials, which comprises a primary feeding device, a secondary feeding device, a primary venturi tube, a secondary venturi tube, a static mixer and a turbulent mixing device, wherein the primary feeding device is connected with the secondary feeding device; the primary venturi tube is positioned below the primary feeding device, the secondary venturi tube is positioned below the secondary feeding device, and the water inlet pipe, the primary venturi tube, the static mixer, the conveying pipe, the secondary venturi tube, the turbulent flow mixing device and the discharging pipe are sequentially connected; the first-level feeding device and the second feeding device both comprise feeding cavities and hemispherical screens, and the outlet of the feeding cavity of the first-level feeding device is connected with the throat pipe of the first-level Venturi tube and the outlet of the feeding cavity of the second-level feeding device is connected with the throat pipe of the second-level Venturi tube through two feeding branch pipes respectively. The utility model does not need to be provided with a stirring motor, can continuously carry out the mixing preparation process of materials, has higher safety factor, can effectively ensure the mixing efficiency and reduce the production cost.

Description

Intrinsically safe mixing device for paste quick-setting and solidifying material

Technical Field

The utility model relates to a solid-liquid mixing device, in particular to an intrinsically safe mixing device for paste quick-setting consolidation materials, and belongs to the technical field of equipment for mixing materials.

Background

Coal is taken as a main body in an energy consumption structure, and the safe mining of the coal is a crucial ring in the industry all the time. However, in the coal mining process, safety problems such as spontaneous combustion of coal seams, roof caving, gas outburst and the like are inevitable, and in order to effectively solve the accidents, currently, various forms of grout are mainly poured into drill holes, wherein the paste quick-setting consolidation material is taken as a novel grouting material and is widely used in the fields of mine fire prevention and extinguishing, crack air leakage blocking and the like, but the setting time of the paste quick-setting consolidation material is short, the paste is not easy to be fully mixed before the slurry is condensed, and therefore, a mixing device for the paste quick-setting consolidation material is necessary to be developed.

In order to efficiently disperse a powdery or granular solid in a liquid, to improve the dispersion efficiency and to save labor cost, many efficient dispersion apparatuses have been industrially developed. For example, the utility model with the application number of CN202022798478.7 discloses a cylindrical mixing device, in the process of mixing materials with chemical reaction, a turbine impeller and a stationary blade pin of the device generate relative motion to the materials, and the stirring, mixing and transportation are carried out simultaneously, so that the mixing time and the sedimentation of solid powder are reduced; for another example, the utility model with the application number of CN201320002627.1 discloses a medicament stirring and mixing device, which adopts a double-layer paddle structure, and reduces the stirring dead angle and increases the stirring range by adjusting the angle between the first paddle blade and the second paddle blade of the device, thereby forming full tank circulation and improving the stirring efficiency; for example, the utility model with the application number of CN201822177399.7 discloses an energy-saving and environment-friendly solid-liquid mixing device for chemical production, which solves the problem that the existing solid-liquid mixing device for chemical production cannot pre-mix solid-liquid articles by the matching use of devices such as a stirring mechanism, a stirring box, a driven bevel gear, a driving bevel gear, a protective cover, a driving wheel, a helical blade and the like.

As can be seen from the above, there have been some research results on solid-liquid mixing apparatuses, but the following problems still remain: firstly, motor devices are needed in the stirring and mixing processes, the underground construction is not facilitated, and the safety coefficient of the stirring and mixing processes is uncertain; secondly, the continuous operation is not available, the mixing process is stopped to take out after the mixture is mixed to form a primary mixture, and the raw materials are added again to mix again, so that the mixing efficiency is low, and the industrial cost is increased; and the energy loss of the stirring motor is large in the mixing process, so that the energy-saving and environment-friendly effects are realized. Based on the problems of the mixing device, how to invent the mixing device for the paste quick-setting and solidifying material to effectively solve the problems is the research direction of the industry.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides the intrinsically safe mixing device for the paste quick-setting and solidifying material, which does not need to be provided with a stirring motor, can continuously carry out the mixing preparation process of the material, has higher safety factor, can effectively ensure the mixing efficiency and reduce the production cost.

In order to achieve the purpose, the utility model adopts the technical scheme that: an intrinsically safe mixing device for paste quick-setting consolidation materials comprises a base, a primary feeding device, a secondary feeding device, a primary venturi tube, a secondary venturi tube, a static mixer and a turbulent mixing device;

the primary feeding device and the secondary feeding device are respectively fixed on the base through two feeding device brackets, the primary venturi tube is positioned under the primary feeding device, the secondary venturi tube is positioned under the secondary feeding device, the primary Venturi tube and the secondary Venturi tube are respectively fixed on the base through two pipeline supports, the primary Venturi tube and the secondary Venturi tube are respectively composed of an inlet section, a contraction section, a throat, a diffusion section and an outlet section, the inlet section of the primary Venturi tube is coaxially connected with one end of the water inlet tube, the outlet section of the primary Venturi tube is coaxially connected with one end of the static mixer, the other end of the static mixer is coaxially connected with one end of the conveying tube, the other end of the conveying tube is coaxially connected with the inlet section of the secondary Venturi tube, the outlet section of the secondary Venturi tube is coaxially connected with one end of the turbulent flow mixing device, and the other end of the turbulent flow mixing device is coaxially connected with one end of the discharging tube;

the first-stage feeding device and the second feeding device respectively comprise a feeding cavity and a hemispherical screen, the feeding cavity is funnel-shaped, and the hemispherical screen is arranged in the feeding cavity and used for screening materials entering the feeding cavity; the outlet of the feeding cavity of the primary feeding device is connected with the throat of the primary Venturi tube, and the outlet of the feeding cavity of the secondary feeding device is connected with the throat of the secondary Venturi tube through two feeding branch pipes respectively;

the static mixer comprises a cylindrical barrel and a plurality of semi-spiral structures, the plurality of semi-spiral structures are uniformly fixed in the cylindrical barrel, and an included angle of 90 degrees is formed between every two adjacent semi-spiral structures; the turbulent flow mixing device comprises a cylindrical shell and two semicircular thin plate groups, wherein each semicircular thin plate group is formed by arranging a plurality of semicircular thin plates at equal intervals, the two semicircular thin plate groups are fixed in the cylindrical shell, and the semicircular thin plates of the two semicircular thin plate groups are arranged in a staggered mode.

Furthermore, a one-way valve is arranged in the feeding branch pipe, and an outlet of the one-way valve faces the throat pipe. The one-way valve can adopt a structure of a vein valve, when negative pressure is formed in the throat, the one-way valve is opened, so that materials in the feeding cavity enter the throat through the feeding branch pipe, and when the pressure in the throat is greater than that of the feeding branch pipe, the one-way valve is automatically closed, and liquid in the throat is prevented from entering the feeding branch pipe to cause blockage.

Further, the base comprises a bottom plate and a plurality of leveling support legs, and the leveling support legs are fixedly connected with the bottom plate. Through the structure, the surfaces of the bottom plates can be adjusted to be positioned on the same horizontal plane, so that subsequent materials can be mixed and transported conveniently.

Further, the coaxial connections are all flange connections. By adopting the structure, the disassembly and the connection can be convenient.

Furthermore, the diameter of the inlet section of the first-stage Venturi tube is 25mm, the diameter of the outlet section of the first-stage Venturi tube is 25mm, the length of the throat tube is 15mm, the throat diameter of the throat tube is 10mm, the contraction cone angle of the contraction section is 21 degrees, the contraction diameter ratio is 0.4, and the diffusion angle of the diffusion section is 10 degrees; the diameter of the inlet section of the secondary Venturi tube is 25mm, the diameter of the outlet section of the secondary Venturi tube is 25mm, the length of the throat tube is 15mm, the throat diameter is 7.5mm, the contraction cone angle of the contraction section is 30 degrees, the contraction diameter ratio is 0.3, and the diffusion angle of the diffusion section is 10 degrees. The setting of the parameters enables the material suction speed of the first-level Venturi tube in the first-level feeding device and the material suction speed of the second-level Venturi tube in the second-level feeding device to be matched, so that the mixing ratio of the two materials meets the required requirements, and finally the two materials can be uniformly mixed in a pipeline.

Further, the mesh number of the hemispherical screen is 100 meshes.

Compared with the prior art, the utility model adopts a mode of combining a base, a primary feeding device, a secondary feeding device, a primary Venturi tube, a secondary Venturi tube, a static mixer and a turbulent flow mixing device, B material and A material of paste quick-setting consolidation material are respectively placed into the primary feeding device and the secondary feeding device, water flow with certain pressure is injected into a water inlet pipe, when the water flow flows through the primary Venturi tube, the negative pressure is generated because a pipeline which is contracted and then gradually expanded is adopted as the structure of the primary Venturi tube, so that the B material is sucked into a throat of the primary Venturi tube to be mixed with the water flow, the B material is uniformly mixed by the static mixer to form B material mixed slurry, then the B material mixed slurry flows into the secondary Venturi tube, the secondary Venturi tube can generate the same action as the primary Venturi tube, and then the A material is sucked into the throat of the secondary Venturi tube to be mixed with the B material mixed slurry, fully mixing the material A and the material B through a turbulent flow mixing device, forming paste quick-setting consolidation material slurry after mixing, and finally outputting the paste quick-setting consolidation material slurry from a discharge pipe; the smaller the reducing ratio of the Venturi tube is, the larger the pressure drop difference is, the reducing ratio of the Venturi tube is increased as much as possible within the range permitted by the pressure measurement precision of the installation size of the pipeline, and particularly the flow resistance can be obviously reduced under the condition of large flow. Therefore, the utility model does not need to be provided with a stirring motor, can continuously carry out the mixing preparation process of the materials, has higher safety factor, can effectively ensure the mixing efficiency and reduce the production cost. In addition, the mixing process is natural mixing, so that the energy consumption is less, and the energy-saving and environment-friendly effects are facilitated.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a sectional view of the configuration of the one-stage venturi of the present invention;

FIG. 3 is a structural sectional view of a static mixer of the present invention;

FIG. 4 is a sectional view of the turbulent mixing device of the present invention.

In the figure: 1-a base; 2-a bottom plate; 3-leveling feet; 4-a feeder holder; 5-a pipe support; 6-water inlet pipe; 7-one-stage Venturi tube; 8-a static mixer; 9-a conveying pipe; 10-a secondary venturi tube; 11-a turbulent mixing device; 12-a discharge pipe; 13-a primary feeding device; 14-a secondary feeding device; 15-hemispherical screen; 16-a feed cavity; 17-a flange; 18-a feed leg; 19-a one-way valve; 20-an inlet section; 21-a constriction section; 22-a throat; 23-a diffuser section; 24-an outlet section; 25-a semi-helical structure; 26-semicircular sheet.

Detailed Description

The present invention will be further explained below.

As shown in fig. 1, the utility model comprises a base 1, a primary feeding device 13, a secondary feeding device 14, a primary venturi tube 7, a secondary venturi tube 10, a static mixer 8 and a turbulent mixing device 11;

the one-level feeding device 13 and the two-level feeding device 14 are respectively fixed on the base 1 through two feeding device brackets 4, the one-level Venturi tube 7 is positioned under the one-level feeding device 13, the two-level Venturi tube 10 is positioned under the two-level feeding device 14, the one-level Venturi tube 7 and the two-level Venturi tube 10 are respectively fixed on the base 1 through two pipeline brackets 5, the one-level Venturi tube 7 and the two-level Venturi tube 10 are respectively composed of an inlet section 20, a contraction section 21, a throat tube 22, a diffusion section 23 and an outlet section 24, the inlet section 20 of the one-level Venturi tube 7 is coaxially connected with one end of the water inlet tube 6, the outlet section 24 of the one-level Venturi tube 7 is coaxially connected with one end of the static mixer 8, the other end of the static mixer 8 is coaxially connected with one end of the conveying tube 9, the other end of the conveying tube 9 is coaxially connected with the inlet section 20 of the two-level Venturi tube 10, the outlet section 24 of the two-level Venturi tube 10 is coaxially connected with one end of the turbulent mixing device 11, the other end of the turbulent flow mixing device 11 is coaxially connected with one end of the discharge pipe 12;

the primary feeding device 13 and the second feeding device 14 both comprise a feeding cavity 16 and a hemispherical screen 15, the mesh number of the hemispherical screen 15 is 100 meshes, the feeding cavity 16 is funnel-shaped, and the hemispherical screen 15 is arranged in the feeding cavity 16 and used for screening materials entering the feeding cavity 16; the outlet of the feeding cavity 16 of the primary feeding device 13 is connected with the throat 22 of the primary Venturi tube 7, and the outlet of the feeding cavity 16 of the secondary feeding device 14 is connected with the throat 22 of the secondary Venturi tube 10 through two feeding branch tubes 18 respectively;

the static mixer 8 comprises a cylindrical barrel and a plurality of semi-spiral structures 25, the semi-spiral structures 25 are uniformly fixed in the cylindrical barrel, and an included angle of 90 degrees is formed between every two adjacent semi-spiral structures 25; the flowing state of paste quick-setting consolidation material slurry in the conveying pipe 9 can be changed, and the purpose of full mixing is achieved; the turbulent mixing device 11 comprises a cylindrical shell and two semicircular thin plate groups, each semicircular thin plate group is formed by arranging a plurality of semicircular thin plates 26 at equal intervals, the two semicircular thin plate groups are fixed in the cylindrical shell, and the semicircular thin plates 26 of the two semicircular thin plate groups are arranged in a staggered mode. As shown in FIG. 2, a one-way valve 19 is arranged in the feeding branch pipe 18, and the outlet of the one-way valve 19 faces to the throat 22. The one-way valve 19 can be a venous valve structure, when the throat 22 is in negative pressure, the one-way valve 19 is opened, so that the material in the feeding cavity 16 enters the throat 22 through the feeding branch pipe 18, and when the pressure in the throat 22 is greater than that of the feeding branch pipe 18, the one-way valve 19 is automatically closed, so that the liquid in the throat 22 is prevented from entering the feeding branch pipe 18 to cause blockage. The base 1 comprises a bottom plate 2 and a plurality of leveling support legs 3, and the leveling support legs 3 are fixedly connected with the bottom plate 2. Through the structure, the surfaces of the bottom plates 2 can be adjusted to be positioned on the same horizontal plane, so that subsequent materials can be mixed and transported conveniently. The coaxial connections are all connected by a flange 17. By adopting the structure, the disassembly and the connection can be convenient. The diameter of the inlet section 20 of the primary Venturi tube 7 is 25mm, the diameter of the outlet section 24 is 25mm, the length of the throat 22 is 15mm, the throat diameter is 10mm, the contraction cone angle of the contraction section 21 is 21 degrees, the contraction diameter ratio is 0.4, and the diffusion angle of the diffusion section 23 is 10 degrees; the diameter of the inlet section 20 of the secondary Venturi tube 10 is 25mm, the diameter of the outlet section 24 is 25mm, the length of the throat 22 is 15mm, the throat diameter is 7.5mm, the contraction cone angle of the contraction section 21 is 30 degrees, the contraction diameter ratio is 0.3, and the diffusion angle of the diffusion section 23 is 10 degrees. The setting of the parameters can ensure that the suction speed of the primary Venturi tube 7 to the materials in the primary feeding device 13 and the suction speed of the secondary Venturi tube 10 to the materials in the secondary feeding device 14 are matched, so that the mixing ratio of the two materials meets the required requirement, and finally the two materials can be uniformly mixed in a pipeline.

When the quick-setting paste feeding device works, a material A and a material B of a paste quick-setting consolidation material are prepared (generally, the material A and the material B are respectively prepared by mixing multiple kinds of powder), the material B of the paste quick-setting consolidation material is placed into the primary feeding device 13, and the material B enters the feeding cavity 16 of the primary feeding device 13 after being screened by the hemispherical screen 15 of the primary feeding device 13; then, placing the material A of the paste quick-setting consolidation material into a secondary feeding device 14, and after the material A is screened by a hemispherical screen 15 of the secondary feeding device 14, feeding the material A into a feeding cavity 16 of the secondary feeding device 14; then, the water inlet pipe 6 is connected into a water path under a mine, water flow with certain pressure flows into the primary venturi tube 7 through the water inlet pipe 6, at the moment, because the primary venturi tube 7 is a pipeline which is contracted firstly and then gradually expanded, when the water flow passes through, a throat pipe 22 of the primary venturi tube 7 generates negative pressure, and then a one-way valve 19 in a feeding branch pipe 18 connected with the primary venturi tube is opened, at the moment, the material B in a feeding cavity 16 of the primary feeding device 13 is sucked into the throat pipe 22 of the primary venturi tube 7 by utilizing pressure difference and enters the static mixer 8 along with the water flow, when the water flow flows through a plurality of half-spiral structures 25 in the static mixer 8, the plurality of half-spiral structures 25 can continuously change the flowing state of the water flow in a subsequent conveying pipe 9, so that the material B is fully and uniformly mixed in the conveying pipe 9 to form material B mixed slurry; then the mixed slurry of the material B enters the secondary Venturi tube 10, at this time, because the structure of the secondary Venturi tube 10 is a pipeline which is contracted firstly and then gradually expanded, when water flows through, the throat pipe 22 of the secondary Venturi tube 10 generates negative pressure, and then the one-way valve 19 in the feeding branch pipe 18 connected with the throat pipe is opened, at this time, the material A in the feeding cavity 16 of the secondary feeding device 14 is sucked into the throat pipe 22 of the secondary Venturi tube 10 to be mixed with the mixed slurry of the material B by utilizing the pressure difference, and then the mixed slurry of the material A and the material B enters the turbulent mixing device 11 together, the plurality of semicircular thin plates 26 in the turbulent mixing device 11 can fully mix the mixed slurry of the material A and the material B flowing through, paste quick-setting consolidation material slurry is formed after mixing, and finally the paste quick-setting consolidation slurry is output from the discharge pipe 12, so that the whole mixing process is completed.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the utility model and these are intended to be within the scope of the utility model.

Claims

1. An intrinsically safe mixing device for paste quick-setting and solidifying materials is characterized by comprising a base, a primary feeding device, a secondary feeding device, a primary venturi tube, a secondary venturi tube, a static mixer and a turbulent mixing device;

2. The intrinsically safe mixing device for paste rapid-setting solidifying materials of claim 1, wherein a one-way valve is arranged in the feeding branch pipe, and an outlet of the one-way valve faces to the throat pipe.

3. The intrinsically safe mixing device for paste quick-setting solidifying material of claim 1, wherein the base comprises a base plate and a plurality of leveling legs, the plurality of leveling legs being fixedly connected to the base plate.

4. The intrinsically safe mixing device for paste quick setting cementitious material of claim 1, wherein the coaxial connections are all flange connections.

5. The intrinsically safe mixing device for paste quick-setting and solidifying materials of claim 1, wherein the primary venturi tube has an inlet section diameter of 25mm, an outlet section diameter of 25mm, a throat length of 15mm, a throat diameter of 10mm, a convergent cone angle of 21 ° for the convergent section, a convergent-radial ratio of 0.4, and a divergent angle of 10 ° for the divergent section; the diameter of the inlet section of the secondary Venturi tube is 25mm, the diameter of the outlet section of the secondary Venturi tube is 25mm, the length of the throat tube is 15mm, the throat diameter is 7.5mm, the contraction cone angle of the contraction section is 30 degrees, the contraction diameter ratio is 0.3, and the diffusion angle of the diffusion section is 10 degrees.

6. The intrinsically safe mixing device for paste quick setting cementitious material of claim 1, wherein the mesh count of the hemispherical mesh is 100 mesh.