Stirrer and guniting equipment with same

Abstract

The utility model discloses a stirrer and guniting equipment, the stirrer comprises a stirring part, the stirring part comprises: two main stirring rods, the two main stirring rods both extend along the vertical direction and are arranged side by side on the two opposite sides of the rotation axis of the stirrer; each first enhanced stirring rod extends in the vertical direction, and the multiple first enhanced stirring rods are distributed around the rotating axis at intervals; the connecting piece comprises a first connecting part and a second connecting part which are connected between the two main stirring rods, the first connecting part and the second connecting part are located on the two sides of the first reference plane correspondingly and are each of an arc-shaped structure protruding in the direction away from the rotating axis, and one part of the multiple first reinforced stirring rods is connected to the first connecting part; the other part of the plurality of first reinforced stirring rods is connected to the second connecting part, and the first reference plane is a plane where the vertical central axes of the two main stirring rods are located. The stirrer is high in stirring strength and can meet the pulping requirement of high-viscosity materials.

Description

Technical Field

[0001] This utility model relates to the field of shotcrete equipment technology, and in particular to a mixer and a shotcrete equipment having the mixer. Background Technology

[0002] For reinforcement needs in coal mine roadways, tunnels, subways, and bridges, shotcreting is an essential construction technique. Shotcreting requires equipment with mixing and shotcreting capabilities.

[0003] Understandably, the uniformity of the slurry prepared by shotcrete equipment directly affects the shotcrete performance. Therefore, the agitator used for mixing materials to prepare the slurry is a crucial component of shotcrete equipment. Existing agitators can meet the slurry preparation requirements of low-viscosity materials (such as concrete), but cannot meet the slurry preparation requirements of high-viscosity materials. For example, when used to mix materials containing high-viscosity materials such as fly ash, there is a problem of uneven mixing. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a stirrer with high stirring intensity, which can meet the pulping requirements of high-viscosity materials. When used to stir materials containing high-viscosity materials such as fly ash for pulping, the prepared slurry has good uniformity and does not affect the material feeding of the spraying equipment during operation.

[0005] This utility model also proposes a shotcrete device with the above-mentioned agitator.

[0006] A stirrer according to a first aspect of the present invention includes: two main stirring rods, both of which extend vertically and are arranged side-by-side on opposite sides of the rotation axis of the stirrer; a plurality of first reinforcing stirring rods, each of which extends vertically and the plurality of first reinforcing stirring rods are spaced apart around the rotation axis, the plurality of first reinforcing stirring rods being located on opposite sides of a first reference plane; and a connector, the connector including a first connecting portion and a second connecting portion connected between the two main stirring rods, the first connecting portion and the second connecting portion being located on opposite sides of the first reference plane and both being arc-shaped structures protruding away from the rotation axis, a portion of the plurality of first reinforcing stirring rods being connected to the first connecting portion, and another portion of the plurality of first reinforcing stirring rods being connected to the second connecting portion, wherein the first reference plane is the plane containing the vertical central axis of the two main stirring rods.

[0007] According to the embodiments of this utility model, the agitator, by setting multiple first reinforcing agitators, achieves high agitation intensity, meeting the pulping requirements of both low-viscosity and high-viscosity materials. When used to mix materials containing high-viscosity materials such as fly ash, the prepared slurry exhibits good uniformity, and the agitator demonstrates good versatility. Furthermore, the multiple reinforcing agitators are connected to the main agitator via arc-shaped first and second connecting portions protruding away from the rotation axis. These connecting parts do not occupy the center position of the mixing chamber, thus preventing them from affecting the material feeding process within the mixing chamber and ensuring smooth material feeding.

[0008] In addition, the stirrer according to the embodiments of this utility model may also have the following additional technical features:

[0009] According to one embodiment of the present invention, the projections of the center point of each of the first reinforcing stirring rods and the center point of each of the main stirring rods in a second reference plane lie on the same circumference, wherein the second reference plane is perpendicular to the axis of rotation.

[0010] According to one embodiment of the present invention, the angle α between the plane containing the agitation surface of the first reinforcing stirring rod and the first reference plane is greater than 90°.

[0011] According to one embodiment of the present invention, the angle α between the plane containing the agitation surface of the first reinforcing stirring rod and the first reference plane is 150°.

[0012] According to one embodiment of the present invention, a portion of a plurality of first reinforcing stirring rods is connected to the outer arc surface of the first connecting portion, and another portion of the plurality of first reinforcing stirring rods is connected to the outer arc surface of the second connecting portion; the stirring portion further includes a plurality of second reinforcing stirring rods that all extend vertically, the plurality of second reinforcing stirring rods being spaced apart around the rotation axis, and the plurality of second reinforcing stirring rods being located on both sides of the first reference plane, a portion of the plurality of second reinforcing stirring rods being connected to the inner arc surface of the first connecting portion, and another portion of the plurality of second reinforcing stirring rods being connected to the inner arc surface of the second connecting portion.

[0013] According to one embodiment of the present invention, when the angle α between the plane containing the agitation surface of the first reinforcing stirring rod and the first reference plane is greater than 90°, the angle β between the plane containing the agitation surface of the second reinforcing stirring rod and the first reference plane is greater than 90°.

[0014] A shotcrete device according to a second aspect of the present invention includes: a mixing chamber defining a mixing cavity within the mixing chamber, the mixing cavity having a feed inlet, a water inlet, and a slurry outlet; a hopper communicating with the feed inlet, the hopper having a feeding mechanism for conveying materials stored in the hopper toward the feed inlet; a slurry conveying pump, the inlet of the slurry conveying pump communicating with the slurry outlet, the outlet of the slurry conveying pump being connected to a spray gun; and a stirrer according to the first aspect of the present invention, the stirrer being rotatably disposed within the mixing cavity.

[0015] The shotcrete equipment according to the present invention, by providing the agitator according to the first aspect of the present invention, enables the shotcrete equipment according to the present invention to have all the advantages of the agitator of the first aspect of the present invention, which will not be repeated here.

[0016] In addition, the shotcrete equipment according to the embodiments of this utility model may also have the following additional technical features:

[0017] According to one embodiment of the present invention, the mixing chamber includes a dry material feeding section and a wet material mixing section that are connected to each other. The dry material feeding section is located above the wet material mixing section. The feed inlet is located in the dry material feeding section, and the water inlet and the slurry outlet are both located in the wet material mixing section. The mixing chamber also includes a guide feeding section located between the dry material feeding section and the wet material mixing section. The cross-sectional area of ​​the guide feeding section decreases from the dry material feeding section toward the wet material mixing section. The main stirring rod includes a first main stirring section and a second main stirring section that are connected to each other. The first main stirring section is located within the guide feeding section, and the second main stirring section and the first reinforcing stirring rod are both located within the wet material mixing section.

[0018] According to one embodiment of the present invention, the top end of the first reinforcing stirring rod is lower than the top end of the second main stirring section, and the ratio D / L between the length D of the portion of the second main stirring section above the first reinforcing stirring rod and the length L of the second main stirring section is in the range of 0.15~0.3.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a perspective view of the shotcrete equipment according to an embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 The diagram shows a partial structural schematic of the shotcrete equipment, omitting the mining electromagnetic vacuum starter.

[0023] Figure 3 yes Figure 2 A cross-sectional view of the structure shown along line AA;

[0024] Figure 4 yes Figure 1 An exploded view of a portion of the shotcrete equipment shown in the image;

[0025] Figure 5 yes Figure 1 A partial structural schematic diagram of the shotcrete equipment shown;

[0026] Figure 6 yes Figure 5 A cross-sectional view of the structure shown along line BB;

[0027] Figure 7 yes Figure 6 A partial enlarged view of the structure shown;

[0028] Figure 8 This is a front view of the stirrer according to the first embodiment of the present invention;

[0029] Figure 9 yes Figure 8 A perspective view of the stirrer shown;

[0030] Figure 10 This is a perspective view of the stirrer according to the second embodiment of the present invention.

[0031] Figure label:

[0032] 100 shotcrete equipment;

[0033] Mixing bin 10; Mixing chamber 11; Feed inlet 111; Water inlet 112; Slurry outlet 113; Dry material feeding section 101; Wet material mixing section 102; Guided feeding section 103;

[0034] Water supply assembly 20; shut-off valve 21; flow meter 22; pressure reducing valve 23; solenoid valve 24; filter 25;

[0035] 30 hopper; 31 feeding mechanism;

[0036] Slurry transfer pump 40; Inlet 41; Outlet 42;

[0037] Agitator 50; Agitator section 51; Main agitator rod 511; First main agitator section 5111; Second main agitator section 5112; First reinforcing agitator rod 5121; Second reinforcing agitator rod 5122; Connector 513; First connecting part 5131; Second connecting part 5132; Rotating shaft 52; Feeding auger 53; Connecting arm 54; First connecting arm section 541; Second connecting arm section 542; Supporting link 55; Pivot joint 551; Actuating surface 501; Rotation axis 502; First reference plane 503; Clearance space 504;

[0038] 60; 70; 80; stirring drive device. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] Please see Figures 1-7 This utility model provides a shotcrete device 100, which includes a mixing chamber 10, a material silo 30, a slurry conveying pump 40, and a mixer 50.

[0041] The mixing chamber 10 defines a mixing cavity 11, which has a feed inlet 111, a water inlet 112, and a pulp outlet 113. The water inlet 112 is adapted to connect to a water delivery assembly 20, which can deliver the water required for pulping into the mixing cavity 11 through the water inlet 112. The mixing chamber 10 can extend vertically. Both the feed inlet 111 and the water inlet 112 can be located on the side wall of the mixing chamber 10, with the feed inlet 111 located above the water inlet 112. The pulp outlet 113 can be located on the bottom wall of the mixing chamber 10.

[0042] The hopper 30 is connected to the inlet 111. A feeding mechanism 31 is provided inside the hopper 30. The feeding mechanism 31 is used to convey the sprayed material stored in the hopper 30 toward the inlet 111, so as to convey the sprayed material stored in the hopper 30 to the mixing chamber 11. The agitator 50 is rotatably disposed in the mixing chamber 11. The agitator 50 includes a stirring part 51. The stirring part 51 is used to mix the sprayed material entering the mixing chamber 11 through the inlet 111 and the water entering the mixing chamber 11 through the water inlet 112 evenly to form a sprayed slurry. After the sprayed slurry is formed, it can be discharged from the mixing chamber 11 through the slurry outlet 113.

[0043] The inlet 41 of the slurry delivery pump 40 is connected to the outlet 113, and the outlet 42 of the slurry delivery pump 40 is connected to a spray gun (not shown in the figure). Thus, the slurry discharged from the mixing chamber 11 through the outlet 113 can be pressurized by the slurry delivery pump 40 and delivered to the spray gun, and then sprayed onto the tunnel wall by the spray gun. Optionally, the slurry delivery pump 40 can be a screw pump.

[0044] Therefore, the shotcrete equipment 100 of this application embodiment can realize the functions of instant feeding and watering, instant mixing, and instant shotcrete. Specifically, shotcrete material is stored in the silo 30, and the feeding mechanism 31 continuously and quantitatively feeds the shotcrete material into the mixing chamber 11 through the feed inlet 111. At the same time, the water supply component 20 continuously and quantitatively supplies the water required for slurry preparation into the mixing chamber 11 through the water inlet 112. The agitator 50 mixes the shotcrete material and water continuously entering the mixing chamber 11 to continuously form a uniform slurry that meets the requirements for shotcrete. The continuously formed slurry is immediately transported to the spray gun by the slurry delivery pump 40 and sprayed onto the shotcrete working surface (e.g., the wall of an underground roadway in a coal mine). By controlling the mass ratio of water supplied by the water supply component 20 into the mixing chamber 11 and shotcrete material supplied by the feeding mechanism 31 into the mixing chamber 11 per unit time, the water-to-material ratio in the prepared slurry can be controlled. During shotcreting operations, the feeding mechanism 31, water supply component 20, agitator 50 and slurry delivery pump 40 work simultaneously, thereby enabling the functions of immediate feeding and watering, immediate mixing and slurry preparation, and immediate shotcreting.

[0045] It should be noted that the "shotcrete material" in this application can be arbitrarily selected as needed. For example, the shotcrete material can be a low-viscosity concrete material or a high-viscosity shotcrete material containing fly ash. Optionally, the shotcrete material includes powdered fly ash, cement, and auxiliary materials. The particle size of the fly ash ranges from 0.5 μm to 300 μm, and the mass ratio of fly ash to cement in the shotcrete material ranges from 2 to 3. That is, the particle size of the fly ash is greater than or equal to 0.5 μm and less than or equal to 300 μm. For example, the particle size of the fly ash can be 0.5 μm, 1.0 μm, 1.5 μm, 10 μm, 20 μm, 50 μm, 80 μm, 120 μm, 150 μm, 180 μm, 200 μm, 250 μm, 280 μm, 290 μm, or 300 μm, etc. In shotcrete materials, the mass ratio of fly ash to cement is greater than or equal to 2 and less than or equal to 3. For example, the mass ratio of fly ash to cement can be 2, 2.1, 2.2, 2.3, 2.35, 2.40, 2.45, 2.50, 2.55, 2.60, 2.70, 2.75, 2.80, 2.85 or 3, etc.

[0046] Furthermore, in the sprayed slurry formed by mixing the sprayed material and water, the mass ratio of water to sprayed material ranges from 0.23 to 0.30, meaning the mass ratio is greater than or equal to 0.23 and less than or equal to 0.30. For example, the mass ratio of water to sprayed material can be 0.23, 0.235, 0.24, 0.25, 0.26, 0.27, 0.28, or 0.30, etc. By controlling the mass ratio of water delivered to the mixing chamber 11 by the water delivery component 20 and the sprayed material delivered to the mixing chamber 11 by the feeding mechanism 31 within a unit time to be within the range of 0.23 to 0.30, it can be ensured that the mass ratio of water to sprayed material in the sprayed slurry formed by mixing the sprayed material and water is within the range of 0.23 to 0.30.

[0047] Through experimental verification, the prepared slurry exhibits good performance within the aforementioned proportional range. Furthermore, the compressive strength of the sprayed slurry layer after solidification, the bond strength between the slurry and the roadway wall, the rebound rate, and the setting time all meet the requirements for shotcreting construction in underground roadways. It should be noted that the "shotcrete layer" mentioned in this application refers to the structural layer bonded to the roadway wall after the slurry sprayed onto the roadway wall has solidified.

[0048] However, within the aforementioned limited ratio range, the viscosity of the slurry is high. The existing mixer 50 can meet the slurry preparation requirements of the aforementioned low-viscosity materials (such as concrete), but cannot meet the slurry preparation requirements of high-viscosity materials. When used to mix the aforementioned high-viscosity slurry containing fly ash materials, there is a problem of uneven mixing.

[0049] To resolve the above technical issues, please refer to Figures 6-10 This application discloses a stirrer 50, which includes a stirring section 51, which includes two main stirring rods 511, a plurality of first reinforcing stirring rods 5121 and a connector 513.

[0050] Two main stirring rods 511 extend vertically and are arranged side-by-side on opposite sides of the rotation axis 502 of the stirrer 50. Each first reinforcing stirring rod 5121 extends vertically, and multiple first reinforcing stirring rods 5121 are spaced apart around the rotation axis 502. The multiple first reinforcing stirring rods 5121 are located on opposite sides of a first reference plane; that is, a portion of the multiple first reinforcing stirring rods 5121 is located on one side of the first reference plane 503, and another portion is located on the other side of the first reference plane 503. The first reference plane 503 is the plane containing the vertical central axes of the two main stirring rods 511.

[0051] The connector 513 includes a first connecting portion 5131 and a second connecting portion 5132 connected between two main stirring rods 511. The first connecting portion 5131 and the second connecting portion 5132 are located on both sides of the first reference plane 503 and are both arc-shaped structures protruding away from the rotation axis 502. A portion of a plurality of first reinforcing stirring rods 5121 is connected to the first connecting portion 5131, and another portion of the plurality of first reinforcing stirring rods 5121 is connected to the second connecting portion 5132. The plurality of first reinforcing stirring rods 5121 are connected to the main stirring rods 511 through the first connecting portion 5131 and the second connecting portion 5132 of the connector 513. Since both the first connecting portion 5131 and the second connecting portion 5132 are arc-shaped structures protruding away from the rotation axis 502, the connector 513 will not occupy the material feeding space in the mixing chamber 11, thereby avoiding the connector 513 from affecting the material feeding process of the shotcrete equipment 100 during operation and ensuring smooth material feeding.

[0052] According to the embodiment of the present invention, the stirrer 50, by providing multiple first reinforcing stirring rods 5121, achieves high stirring intensity, meeting the pulping requirements of both low-viscosity and high-viscosity materials. When used to stir materials containing high-viscosity materials such as fly ash for pulping, the prepared slurry exhibits good uniformity, and the stirrer 50 demonstrates good versatility. Furthermore, the multiple first reinforcing stirring rods 5121 are respectively connected to the main stirring rod 511 via arc-shaped first connecting parts 5131 and second connecting parts 5132 protruding away from the rotation axis 502. The connecting parts 513 do not occupy the center position of the mixing chamber 11, thereby preventing the connecting parts 513 from affecting the material feeding process within the mixing chamber 11 and ensuring smooth material feeding within the mixing chamber 11.

[0053] In some embodiments of this application, the connector 513 may include a plurality of connectors spaced vertically apart, for example, two connectors (e.g., ...). Figures 8-10 (as shown in the diagram), three or four, etc. By including multiple connectors 513 arranged at vertical intervals, the connection strength between the main stirring rod 511 and the first reinforcing stirring rod 5121 can be enhanced, thereby making the connection between the main stirring rod 511 and the first reinforcing stirring rod 5121 more stable and reliable.

[0054] Optionally, please refer to Figures 8-10 The two circumferential ends of the first connecting part 5131 are directly connected to the two circumferential ends of the second connecting part 5132, thus forming a closed ring structure. Alternatively, the two circumferential ends of the first connecting part 5131 and the two circumferential ends of the second connecting part 5132 are not directly connected, but are indirectly connected together through the main stirring rod 511.

[0055] In some embodiments of this application, please refer to Figures 5-6 The mixing chamber 11 includes a dry material feeding section 101 and a wet material mixing section 102 that are connected to each other. The dry material feeding section 101 is located above the wet material mixing section 102. The feed inlet 111 is located in the dry material feeding section 101, and the water inlet 112 and the slurry outlet 113 are both located in the wet material mixing section 102. Specifically, the feed inlet 111 can be located on the side wall of the dry material feeding section 101, the water inlet 112 can be located on the side wall of the wet material mixing section 102, and the slurry outlet 113 can be located on the bottom wall of the wet material mixing section 102. At least a portion of the mixing unit 51 is located within the wet material mixing section 102. When the shotcrete equipment 100 is working, the feeding mechanism 31 feeds the shotcrete material directly into the dry material feeding section 101 through the feed inlet 111. Then, the shotcrete material falls to the wet material mixing section 102 under the action of gravity. Then, it is mixed with water in the wet material mixing section 102 and forms a uniformly mixed shotcrete slurry under the stirring action of the mixing part 51.

[0056] By including a dry material feeding section 101 and a wet material mixing section 102 connected to each other in the mixing chamber 11, and with the feed inlet 111 located in the dry material feeding section 101, and the water inlet 112 and the slurry outlet 113 located in the wet material mixing section 102, the water delivery assembly 20 delivers water only to the wet material mixing section 102. The spraying material and water are mixed in the wet material mixing section 102, and water or wet material will not enter the dry material feeding section 101. This avoids water or wet material in the mixing chamber 11 from entering the silo 30 through the feed inlet 111 located in the dry material feeding section 101, thus preventing the spraying material stored in the silo 30 from getting wet.

[0057] Please continue reading. Figures 5-6 The mixing chamber 11 also includes a guiding discharge section 103 located between the dry material feeding section 101 and the wet material mixing section 102. The cross-sectional area of ​​the guiding discharge section 103 decreases from the dry material feeding section 101 toward the wet material mixing section 102. In this way, the guiding discharge section 103 guides the sprayed material in the dry material feeding section 101 toward the wet material mixing section 102, thereby ensuring a smoother discharge process.

[0058] Further, please refer to Figures 6-7 The main stirring rod 511 includes a first main stirring section 5111 and a second main stirring section 5112 connected to each other. The first main stirring section 5111 is located within the guiding and feeding section 103, while the second main stirring section 5112 and the first reinforcing stirring rod 5121 are both located within the wet material mixing section 102. In this way, the second main stirring section 5112 and the first reinforcing stirring rod 5121 of the main stirring rod 511 can work together to stir and prepare the slurry within the wet material mixing section 102, resulting in high stirring intensity and good uniformity of the prepared slurry.

[0059] Furthermore, by positioning the first main mixing section 5111 within the guide feeding section 103, the first main mixing section 5111 provides a mixing function within the guide feeding section 103. This effectively mixes and disperses the material falling into the guide feeding section 103, preventing the grout material from accumulating or becoming stuck within the guide feeding section 103, and ensuring that the grout material can smoothly fall into the wet material mixing section 102. Optionally, please refer to... Figures 6-10 The agitator 50 may also include a feeding screw 53, which is located in the guiding feeding section 103. When the agitator 50 rotates, the feeding screw 53 can push the material in the guiding feeding section 103 down into the wet material mixing section 102, thereby making the feeding smoother.

[0060] In addition, please see Figures 6-7 By positioning the first reinforcing stirring rod 5121 within the wet material mixing section 102, it is possible to avoid excessive stirring rods within the guiding material feeding section 103, which would occupy the internal space of the guiding material feeding section 103 and thus affect the feeding of the sprayed material within the guiding material feeding section 103 into the wet material mixing section 102.

[0061] For further information, please refer to [link / reference]. Figures 6-7 The top end of the first reinforcing stirring rod 5121 is lower than the top end of the second main stirring section 5112. The ratio D / L between the length D of the portion of the second main stirring section 5112 above the first reinforcing stirring rod 5121 and the length L of the second main stirring section 5112 is in the range of 0.15 to 0.3. That is, the ratio D / L can be greater than or equal to 0.15 and less than or equal to 0.3. For example, the ratio D / L can be 0.15, 0.16, 0.18, 0.20, 0.25, 0.28, or 0.3, etc.

[0062] By positioning the top of the first reinforcing stirring rod 5121 lower than the top of the second main stirring section 5112, a clearance space 504 is formed between the top of the first reinforcing stirring rod 5121 and the second main stirring section 5112. This clearance space facilitates the feeding of materials into the wet material mixing section 102, ensuring smoother material feeding. By setting the ratio D / L to a range of 0.15 to 0.3, the mixing intensity of the stirring section 51 within the wet material mixing section 102 can be guaranteed while also ensuring smooth material feeding within the wet material mixing section 102.

[0063] In one embodiment of this invention, the center points of each main stirring rod 511 and the center points of each first reinforcing stirring rod 5121 are projected onto the same circumference in a second reference plane, wherein the second reference plane is perpendicular to the rotation axis 502. This results in better stirring performance of the stirring section 51 and more uniform mixing of the slurry.

[0064] Optionally, please refer to Figures 9-10 The angle α between the plane containing the agitation surface 501 of the first reinforcing stirring rod 5121 and the first reference plane 503 is greater than 90°. For example, the angle α can be 100°, 110°, 120°, 150°, or 160°. By making the angle α between the plane containing the agitation surface 501 of the first reinforcing stirring rod 5121 and the first reference plane 503 greater than 90°, the resistance experienced by the first reinforcing stirring rod 5121 during the stirring of materials can be reduced, thereby reducing the load on the stirrer 50 during rotation.

[0065] It should be noted that the agitation surface 501 of the first reinforced stirring rod 5121 mentioned here refers to the surface of the first reinforced stirring rod 5121 used to agitate the material during the rotation of the stirrer 50.

[0066] Similarly, the agitation surface 501 of the second reinforcing agitator 5122 described below refers to the surface of the second reinforcing agitator 5122 used to agitate the material during the rotation of the agitator 50.

[0067] In a specific example of this application, the angle α between the plane containing the agitation surface 501 of the first reinforcing stirring rod 5121 and the first reference plane 503 is 150°, thereby ensuring the stirring intensity of the stirrer 50 while reducing the load on the stirrer 50 during rotation.

[0068] Of course, this application is not limited to this. The angle α between the plane where the agitation surface 501 of the first reinforcing stirring rod 5121 is located and the first reference plane 503 can be less than 90° or equal to 90°.

[0069] In some embodiments of this application, please refer to Figure 10 A portion of each of the first reinforcing stirring rods 5121 is connected to the outer arc surface of the first connecting portion 5131, and another portion of each of the first reinforcing stirring rods 5121 is connected to the outer arc surface of the second connecting portion 5132. The stirring portion 51 also includes a plurality of second reinforcing stirring rods 5122, all extending vertically. These second reinforcing stirring rods 5122 are spaced apart around the rotation axis 502 and are located on opposite sides of the first reference plane 503. A portion of each second reinforcing stirring rod 5122 is connected to the inner arc surface of the first connecting portion 5131, and another portion of each second reinforcing stirring rod 5122 is connected to the inner arc surface of the second connecting portion 5132. The lengths of the first reinforcing stirring rods 5121 and the second reinforcing stirring rods 5122 can be equal, and the top ends of the first reinforcing stirring rods 5121 and the second reinforcing stirring rods 5122 can be flush in the horizontal direction, as can the bottom ends of the first reinforcing stirring rods 5121 and the second reinforcing stirring rods 5122.

[0070] It should be noted that "the outer arc surface of the first connecting part 5131" refers to the surface of the first connecting part 5131 facing away from the rotation axis 502, and "the outer arc surface of the second connecting part 5132" refers to the surface of the second connecting part 5132 facing away from the rotation axis 502. "The inner arc surface of the first connecting part 5131" refers to the surface of the first connecting part 5131 facing the rotation axis 502, and "the inner arc surface of the second connecting part 5132" refers to the surface of the second connecting part 5132 facing the rotation axis 502.

[0071] In other words, the outer ring of the first connector 513 is connected to multiple first reinforcing stirring rods 5121, and the inner ring of the second connector 513 is connected to multiple second reinforcing stirring rods 5122. This can enhance the intensity of the vortex formed by the stirrer 50 in the wet material mixing section 102, and make the water and material mix more evenly.

[0072] Please see Figure 10 The angle α between the plane containing the agitation surface 501 of the first reinforcing stirring rod 5121 and the first reference plane 503 is greater than 90°, and the angle β between the plane containing the agitation surface 501 of the second reinforcing stirring rod 5122 and the first reference plane 503 is also greater than 90°. For example, the angle β can be 100°, 110°, 120°, 150°, or 160°, etc. By making the angle β between the plane containing the agitation surface 501 of the second reinforcing stirring rod 5122 and the first reference plane 503 greater than 90°, the resistance experienced by the second reinforcing stirring rod 5122 during material mixing can be reduced, thereby reducing the load on the stirrer 50 during rotation.

[0073] Please continue reading. Figure 6 The agitator 50 also includes a vertically extending shaft 52, at least a portion of which is located within the dry material feeding section 101. One end of the shaft 52 is connected to a stirring drive device 60, which can be a motor, and the other end is connected to the top of the main stirring rod 511. Specifically, the upper end of the shaft 52 is connected to the stirring drive device 60, and the upper end of the shaft 52 can be located within the dry material feeding section 101 (e.g., ...). Figure 6 As shown in the figure, by extending the drive shaft of the stirring drive device 60 into the dry material feeding section 101, the upper end of the stirring drive device 60 and the rotating shaft 52 can be connected; or the upper end of the rotating shaft 52 can pass through the dry material feeding section 101 to the outside of the mixing chamber 10 and be connected to the stirring drive device 60.

[0074] Further, please refer to Figures 6-10The stirrer 50 also includes a connecting arm 54, which comprises a first connecting arm segment 541 and a second connecting arm segment 542. The two ends of the first connecting arm segment 541 are connected to the rotating shaft 52 and one of the two main stirring rods 511, respectively, while the two ends of the second connecting arm segment 542 are connected to the rotating shaft 52 and the other of the two main stirring rods 511, respectively. In other words, the two main stirring rods 511 are connected to the rotating shaft 52 via the first connecting arm segment 541 and the second connecting arm segment 542 of the connecting arm 54. Both the first connecting arm segment 541 and the second connecting arm segment 542 can extend horizontally. By providing the connecting arm 54, the connection between the main stirring rods 511 and the rotating shaft 52 can be made more convenient.

[0075] In some embodiments of this application, please refer to Figures 6-10 The stirrer 50 also includes a support rod 55, with its two ends along its length connected to the lower ends of the two main stirring rods 511. By providing the support rod 55, the overall structural strength of the stirring section 51 can be enhanced, preventing the stirring section 51 from shaking or breaking during the stirring process.

[0076] For further information, please refer to [link / reference]. Figures 6-10 The support link 55 is provided with a downwardly extending pivot 551, which is connected to the screw of the slurry conveying pump 40. In this way, the agitator 50 and the screw can be driven to rotate synchronously at the same time by a stirring drive device 60.

[0077] In some embodiments of this application, please refer to Figures 1-4 The feeding mechanism 31 can be a star-shaped feeding mechanism. The star-shaped feeding mechanism is driven to rotate by the feeding drive device 70. By rotating the star-shaped feeding mechanism in the hopper 30, the sprayed material can be continuously, uniformly and quantitatively conveyed into the mixing chamber 11.

[0078] Optionally, please refer to Figure 1 The shotcrete equipment 100 also includes two mining electromagnetic vacuum starters 80, one of which is electrically connected to the stirring drive device 60, and the other is electrically connected to the feeding drive device 70. By setting up the mining electromagnetic vacuum starters 80, the safety of the shotcrete equipment 100 during underground operation can be ensured.

[0079] In some embodiments of this application, the water delivery assembly 20 may include a high-pressure water pipe (not shown) in an underground coal mine roadway. By connecting the high-pressure water pipe to the water inlet 112, the water required for stirring and slurry preparation can be delivered into the mixing chamber 11.

[0080] Further, please refer to Figures 1-4The water supply assembly 20 may also include a shut-off valve 21 and a flow meter 22. One end of the shut-off valve 21 is adapted to connect to a high-pressure water pipe (not shown in the figure), and the other end of the shut-off valve 21 is connected to the inlet 112. The flow meter 22 is located between the shut-off valve 21 and the inlet 112 to measure the flow rate of water supplied to the mixing chamber 11. In this way, not only can the shut-off valve 21 control the opening and closing of the high-pressure water pipe and the inlet 112, thereby controlling whether water is supplied to the mixing chamber 11, but the flow rate of water supplied to the mixing chamber 11 can also be adjusted by adjusting the opening of the shut-off valve 21. Specifically, during construction, the opening of the shut-off valve 21 can be adjusted by observing the reading of the flow meter 22, thereby achieving water supply according to the required flow rate to ensure that the mass ratio of water supplied by the water supply assembly 20 to the mixing chamber 11 and the mass ratio of the shotcrete material supplied by the feeding mechanism 31 to the mixing chamber 11 within a unit time ranges from 0.23 to 0.30, making the operation simple and convenient.

[0081] Optionally, continue reading Figures 1-4 The water supply assembly 20 also includes a pressure reducing valve 23, which can be located between the shut-off valve 21 and the flow meter 22. This allows the high-pressure water to be reduced in pressure before flowing through the flow meter 22 and then into the mixing chamber 11 through the inlet 112. By setting the pressure reducing valve 23, damage to the flow meter 22 due to excessive water pressure can be avoided, and the water pressure entering the mixing chamber 11 can be made more suitable for stirring and slurry preparation. Generally speaking, the water pressure in the high-pressure water pipe in the underground roadway is usually 2 MPa, while the suitable water pressure for stirring and slurry preparation in the mixing chamber 11 is usually 0.2 MPa.

[0082] Please continue reading. Figures 1-4 The water supply assembly 20 may also include a solenoid valve 24, which may be located between the pressure reducing valve 23 and the flow meter 22. The solenoid valve 24 is used to control the automatic on / off of the water flow. Specifically, the solenoid valve 24 may be electrically connected to the agitator 50 and the feeding mechanism 31, so that when the agitator 50 and the feeding mechanism 31 are started, the solenoid valve 24 will automatically open, thereby realizing automatic water supply to the mixing chamber 11.

[0083] Please continue reading. Figures 1-4 The water supply assembly 20 may also include a filter 25, which may be located between the shut-off valve 21 and the pressure reducing valve 23. The filter 25 filters the water flow, thereby preventing impurities in the water flow from damaging the pressure reducing valve 23, the solenoid valve 24, the flow meter 22 and other devices.

[0084] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0085] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A whisk, characterized by, Includes a stirring unit, said stirring unit comprising: Two main stirring rods, both of which extend vertically and are arranged side by side on opposite sides of the rotation axis of the stirrer; Multiple first reinforcing stirring rods, each of which extends vertically and the multiple first reinforcing stirring rods are spaced apart around the rotation axis, and the multiple first reinforcing stirring rods are respectively located on both sides of the first reference plane; The connector includes a first connecting portion and a second connecting portion connected between the two main stirring rods. The first connecting portion and the second connecting portion are located on opposite sides of the first reference plane and are both arc-shaped structures protruding away from the rotation axis. A portion of the plurality of first reinforcing stirring rods is connected to the first connecting portion, and another portion of the plurality of first reinforcing stirring rods is connected to the second connecting portion. The first reference plane is the plane containing the vertical center axes of the two main stirring rods.

2. The beater of claim 1, wherein The center point of each of the first reinforcing stirring rods and the center point of each of the main stirring rods are projected onto the same circumference in a second reference plane, wherein the second reference plane is perpendicular to the axis of rotation.

3. The beater of claim 1, wherein, The angle α between the plane containing the agitation surface of the first reinforced stirring rod and the first reference plane is greater than 90°.

4. The beater of claim 3, wherein The angle α between the plane containing the agitation surface of the first reinforcing stirring rod and the first reference plane is 150°.

5. The beater of any one of claims 1-4, wherein, A portion of the plurality of first reinforcing stirring rods is connected to the outer arc surface of the first connecting portion, and another portion of the plurality of first reinforcing stirring rods is connected to the outer arc surface of the second connecting portion; The stirring section further includes a plurality of second reinforcing stirring rods that extend vertically. The plurality of second reinforcing stirring rods are spaced apart around the rotation axis and are located on both sides of the first reference plane. A portion of the plurality of second reinforcing stirring rods is connected to the inner arc surface of the first connecting part, and another portion of the plurality of second reinforcing stirring rods is connected to the inner arc surface of the second connecting part.

6. The beater of claim 5, wherein, When the angle α between the plane containing the agitation surface of the first reinforcing stirring rod and the first reference plane is greater than 90°, the angle β between the plane containing the agitation surface of the second reinforcing stirring rod and the first reference plane is greater than 90°.

7. A gunite apparatus characterized by, include: A mixing chamber, wherein a mixing cavity is defined within the mixing chamber, and the mixing cavity has a feed inlet, a water inlet, and a slurry outlet; A hopper is connected to the feed inlet and a feeding mechanism is provided inside the hopper. The feeding mechanism is used to transport the material stored in the hopper toward the feed inlet. A slurry delivery pump, wherein the inlet of the slurry delivery pump is connected to the slurry outlet, and the outlet of the slurry delivery pump is connected to a spray gun; The stirrer according to any one of claims 1-6 is rotatably disposed within the mixing chamber.

8. A gunite apparatus as defined in claim 7, wherein, The mixing chamber includes a dry material feeding section and a wet material mixing section that are connected to each other. The dry material feeding section is located above the wet material mixing section. The feed inlet is located in the dry material feeding section. The water inlet and the slurry outlet are both located in the wet material mixing section. The mixing chamber further includes a guide feeding section located between the dry material feeding section and the wet material mixing section, wherein the cross-sectional area of ​​the guide feeding section decreases from the dry material feeding section toward the wet material mixing section; The main stirring rod includes a first main stirring section and a second main stirring section connected to each other. The first main stirring section is located in the guiding and feeding section, and the second main stirring section and the first reinforcing stirring rod are both located in the wet material stirring section.

9. A gunite apparatus as defined in claim 8, wherein, The top of the first reinforcing stirring rod is lower than the top of the second main stirring section, and the ratio D / L between the length D of the portion of the second main stirring section above the first reinforcing stirring rod and the length L of the second main stirring section is in the range of 0.15~0.3.

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