A mixing device for SAP steel slag sand concrete

Abstract

The utility model discloses a SAP steel slag sand concrete mixing equipment including biaxial mixing unit, support frame, powder feed bin, aggregate feed pipe, water inlet bin, additive spraying subassembly, additive spraying subassembly includes a plurality of additive material tank, electric valve, delivery pipe, a plurality of shower nozzles, the lower portion of additive material tank is provided with electric valve, and the delivery pipe is communicated with the electric valve discharge port, and the other end of delivery pipe is inserted into the inside of biaxial mixing unit, and a plurality of shower nozzles are arranged on the delivery pipe inside located in biaxial mixing unit. The utility model discloses a biaxial stirring subassembly is used as the core unit of concrete mixing equipment, and the full and even mixing of various raw material components can be effectively improved through biaxial stirring, and the uniformity of additive aggregate, powder mixing can be effectively guaranteed through the suspension liquid spraying mode for mixing of the additive with less amount.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete mixing equipment, specifically a mixing equipment for SAP steel slag sand concrete. Background Technology

[0002] Currently, the massive demand and use of ordinary concrete has significantly impacted my country's sustainable development, primarily because its preparation requires a large amount of sand and gravel. According to the latest data, my country consumes 20 billion tons of sand annually, accounting for 60% of global sand consumption, and is currently facing the severe challenge of dwindling sand resources. The development of my country's steel industry is accompanied by the generation of large quantities of steel slag industrial byproducts. Therefore, using steel slag as fine aggregate to replace river sand in concrete is undoubtedly an effective way to alleviate the resource crisis and reduce engineering costs. However, incompletely aged steel slag contains compounds such as free calcium oxide, which can affect the volume stability of cement concrete to some extent, posing safety hazards. To address this issue, by incorporating SAP superabsorbent resin, basalt fiber, polypropylene fiber, and nano-SiO2 additives during the preparation of steel slag sand concrete, the crack resistance, impermeability, compressive strength, splitting tensile strength, flexural strength, and carbonation resistance of steel slag sand concrete can be effectively improved, mitigating the adverse effects of the volume expansion of free calcium oxide in steel slag on buildings. Based on the applicant's research and experiments, the amount of additives such as SAP superabsorbent resin, basalt fiber and polypropylene fiber, and nano-SiO2 added is generally less than 1% (by weight). How to achieve uniform distribution of the additives in concrete is an important factor affecting the doping effect. Summary of the Invention

[0003] The purpose of this invention is to provide a mixing device for SAP steel slag sand concrete to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides a mixing equipment for SAP steel slag sand concrete, comprising a biaxial mixing unit, a support frame, a powder feed silo, an aggregate feed pipe, a water inlet silo, and an additive spraying assembly; the powder feed silo, aggregate feed pipe, water inlet silo, and additive spraying assembly are mounted on the support frame above the biaxial mixing unit; the additive spraying assembly includes several additive tanks, an electric valve, a conveying pipe, and several spray heads; an electric valve is provided at the lower part of the additive tank, the outlet of which is connected to the conveying pipe, and the other end of the conveying pipe extends into the biaxial mixing unit, and several spray heads are provided on the conveying pipe located inside the biaxial mixing unit.

[0005] Furthermore, the material addition tank includes a tank body and a stirring unit, with a water inlet and a material inlet window provided on the upper part of the tank body; the stirring unit includes a stirring motor, a drive shaft, and stirring blades.

[0006] Furthermore, the height of the spray head is higher than the height of the powder feed hopper and the aggregate feed pipe at the powder outlet and aggregate outlet in the biaxial mixing unit.

[0007] Furthermore, the additive spraying assembly also includes a spray pump; the delivery pipe includes a first inlet section, a second inlet section, and an in-cavity outlet section; one end of the first inlet section and the second inlet section are respectively connected to the electric valve of the additive tank, and the other end is connected to the inlet end of the spray pump; the outlet end of the spray pump is connected to the in-cavity outlet section.

[0008] Furthermore, the liquid outlet section inside the cavity includes a U-shaped distribution section and a liquid outlet connection section. The liquid outlet end of the spray pump is connected to the liquid outlet connection section, and the other end of the liquid outlet connection section extends into the interior of the biaxial mixing unit and communicates with the U-shaped distribution section. Several spray heads are distributed on the lower side of the U-shaped distribution section.

[0009] Furthermore, the spray head includes a spray head tube and a spray nozzle. The spray head tube is cylindrical and connected to the U-shaped distribution section. The spray nozzle is located outside the spray head tube and includes a cylindrical section and a flat section. The cylindrical section is sleeved on the outside of the spray head tube.

[0010] Furthermore, multiple staggered extension strips are provided below the spray nozzle, and metal clamps are provided at the ends of the extension strips.

[0011] This invention proposes a SAP steel slag sand concrete mixing equipment that uses a twin-shaft mixing assembly as the core unit of the concrete mixing equipment. The twin-shaft mixing effectively improves the thorough and uniform mixing of various raw material components. For additives added in small quantities, a suspension spraying method is used for mixing, effectively ensuring the uniformity of the additives mixed with aggregates and powders. Furthermore, the spray pipe nozzles are designed to prevent clogging, reducing the risk of them being blocked by cement during use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall design of the mixing equipment of this utility model.

[0013] Figure 2 This is a schematic diagram of the additive spraying component of the mixing equipment of this utility model.

[0014] Figure 3 This is a partial cross-sectional schematic diagram of the additive spraying component of the mixing equipment of this utility model.

[0015] Figure 4 This is a schematic diagram of the material addition tank of the mixing equipment of this utility model.

[0016] Figure 5 This is a schematic diagram of the first embodiment of the spray head of the mixing equipment of this utility model.

[0017] Figure 6 This is a schematic diagram of the spray head of the second embodiment of the spray head of the mixing equipment of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] As attached Figure 1-3 As shown, the SAP steel slag sand concrete mixing equipment involved in this utility model includes a twin-shaft mixing unit 1, a support frame 2, a powder feed hopper 3, an aggregate feed pipe 4, a water inlet hopper 5, and an additive spraying assembly 6.

[0020] The biaxial mixing unit 1 is located in the middle of the support frame 2. The powder feed hopper 3, aggregate feed pipe 4, water inlet hopper 5, and additive spraying assembly 6 are located on the support frame 2 above the biaxial mixing unit 1. The outlets of the powder feed hopper 3, aggregate feed pipe 4, and water inlet hopper 5 are connected to the inner cavity of the biaxial mixing unit 1 and are used to add powder, aggregate, and water into the biaxial mixing unit.

[0021] The dual-shaft mixing unit 1, powder feed hopper 3, aggregate feed pipe 4, and water inlet 5 can be selected from commercially available equipment, and their specific selection and structure are not protected by this application.

[0022] The additive spraying assembly 6 includes several additive tanks 61, an electric valve 62, a conveying pipe 63, and several spray heads 64. An electric valve 62 is located at the lower part of each additive tank 61, and its outlet is connected to the conveying pipe 63. The other end of the conveying pipe 63 extends into the biaxial mixing unit 1. Several spray heads 64 are installed on the conveying pipe 63 located inside the biaxial mixing unit 1. (See attached diagram) Figure 4 The schematic diagram of the material addition tank 61 shown includes a tank body 611 and a stirring unit 612. A water inlet 614 and a material inlet window 613 are provided on the upper part of the tank body 611. The stirring unit 612 includes a stirring motor, a drive shaft, and stirring blades, and its structure can adopt a conventional design in the field.

[0023] When in use, the additive is added into the tank through the feed opening 613, and then water or other water mixture is added through the water inlet 614. Before spraying, the solid-liquid mixture in the tank is stirred by the stirring unit 612 to obtain a suspension, and then sprayed.

[0024] The spray head 64 is positioned at a height higher than the powder feed hopper 3 and the aggregate feed pipe 4 within the biaxial mixing unit 1, which can reduce the accumulation of powder and aggregate on the spray head during the feeding process.

[0025] To ensure sufficient pressure during spraying, the additive spraying assembly 6 also includes a spray pump 65.

[0026] To facilitate pipeline layout, the delivery pipe 63 includes a first inlet section 631, a second inlet section 632, and an inlet section 633. One end of the first inlet section 631 and the second inlet section 632 are connected to the electric valve 62 of the material addition tank 61, and the other end is connected to the inlet end of the spray pump 65. The outlet end of the spray pump 65 is connected to the inlet section 633.

[0027] The liquid outlet section 633 inside the cavity includes a U-shaped distribution section 6331 and a liquid outlet connection section 6332. The liquid outlet end of the spray pump 65 is connected to the liquid outlet connection section 6332. The other end of the liquid outlet connection section 6332 extends into the interior of the biaxial mixing unit 1 and communicates with the U-shaped distribution section 6331. Several spray heads 64 are distributed on the lower side of the U-shaped distribution section 6331.

[0028] As attached Figure 3 , 5 As shown, this application provides an embodiment of a spray head, including a spray head tube 641 and a spray nozzle 642. The spray head tube 641 is cylindrical and communicates with a U-shaped distribution section 6331. The spray nozzle 642 is disposed outside the spray head tube 641 and is made of a soft material, such as rubber or plastic. The spray nozzle 642 includes a cylindrical section 6421 and a flat section 6422. The cylindrical section 6421 is sleeved on the outside of the spray head tube 641. The flat section 6422 is closed when not under pressure due to its own elasticity. When the spray pump 65 is started, the flat section 6422 deforms under the pressure of the inlet liquid, and the liquid flows out through the outlet. This achieves a certain anti-clogging effect when no liquid is entering. This embodiment has the advantages of simple structure and low cost, and can also be easily maintained and replaced after clogging.

[0029] As attached Figure 6As shown, this application also provides another embodiment of the spray nozzle 642, in which multiple staggered extension strips 6423 are provided below the spray nozzle 642, and metal clamps 6424 are provided at the ends of the extension strips 6423. During use, the additive spray assembly 6 sprays intermittently during the feeding process. During the spraying intervals, cement powder in the biaxial mixing unit 1 will always splash onto the spray nozzle 642 during the mixing process, which may cause blockage. The extension strips 6423 and metal clamps 6424 can utilize the vibration generated during the operation of the biaxial mixing unit 1 to remove the powder accumulated on the spray nozzle 642.

[0030] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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.

Claims

1. A mixing apparatus for SAP steel slag sand concrete, characterized by, The system includes a biaxial mixing unit, a support frame, a powder feed hopper, an aggregate feed pipe, a water inlet, and an additive spraying assembly. The powder feed hopper, aggregate feed pipe, water inlet, and additive spraying assembly are mounted on the support frame above the biaxial mixing unit. The additive spraying assembly includes several additive tanks, an electric valve, a conveying pipe, and several spray heads. An electric valve is installed at the bottom of each additive tank, and the outlet of the electric valve is connected to the conveying pipe. The other end of the conveying pipe extends into the biaxial mixing unit, and several spray heads are installed on the conveying pipe located inside the biaxial mixing unit.

2. The SAP steel slag sand concrete mixing equipment according to claim 1, characterized in that, The material addition tank includes a tank body and a stirring unit. A water inlet and a material inlet window are provided on the upper part of the tank body. The stirring unit includes a stirring motor, a drive shaft, and stirring blades.

3. The SAP steel slag sand concrete mixing equipment according to claim 1, characterized in that, The spray head is positioned at a height higher than the powder feed hopper and aggregate feed pipe at the powder outlet and aggregate outlet within the biaxial mixing unit.

4. The SAP steel slag sand concrete mixing equipment according to claim 1, characterized in that, The additive spraying assembly also includes a spray pump; the delivery pipe includes a first inlet section, a second inlet section, and an in-cavity outlet section; one end of the first inlet section and the second inlet section are respectively connected to the electric valve of the additive tank, and the other end is connected to the inlet end of the spray pump; the outlet end of the spray pump is connected to the in-cavity outlet section.

5. The mixing equipment for SAP steel slag sand concrete according to claim 4, characterized in that, The liquid outlet section inside the cavity includes a U-shaped distribution section and a liquid outlet connection section. The liquid outlet end of the spray pump is connected to the liquid outlet connection section, and the other end of the liquid outlet connection section extends into the interior of the biaxial mixing unit and communicates with the U-shaped distribution section. Several spray heads are distributed on the lower side of the U-shaped distribution section.

6. The mixing equipment for SAP steel slag sand concrete according to claim 5, characterized in that, The spray head includes a spray head tube and a spray nozzle. The spray head tube is cylindrical and connected to a U-shaped distribution section. The spray nozzle is located on the outside of the spray head tube and includes a cylindrical section and a flat section. The cylindrical section is sleeved on the outside of the spray head tube.

7. The mixing equipment for SAP steel slag sand concrete according to claim 6, characterized in that, Multiple staggered extension strips are provided below the spray nozzle, and metal clamps are provided at the ends of the extension strips.

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