Cooling and dust reducing mechanism for powder tank of mixing station

Abstract

The utility model belongs to concrete production technical field, concretely relates to a cooling dust fall mechanism for powder tank of mixing station, including powder tank group, spray mechanism and liquid supply mechanism, the spray mechanism includes support subassembly and spray subassembly, support subassembly includes the support frame and mounting frame fixed connection from top to bottom in proper order, and the mounting frame lower end is fixedly installed on the ground of powder tank, and the support frame sets up at the upper portion of powder tank group, spray subassembly includes annular spray pipe and swing arm type shower nozzle, annular spray pipe fixedly installs on the support frame, and the liquid supply mouth of liquid supply mechanism communicates with the liquid inlet of annular spray pipe through the pipeline, a plurality of liquid outlets are opened in the circumference array of annular spray pipe lower end, and the swing arm type shower nozzle is communicated with on a plurality of liquid outlets of annular spray pipe, and the spray direction of swing arm type shower nozzle is towards the outer wall of powder tank group, and swing arm type shower nozzle is used for reciprocating swing spray to a plurality of powder tank outer wall, and the cooling of this scheme is more comprehensive and more uniform.

Description

Technical Field

[0001] This utility model belongs to the field of concrete production technology, and more specifically, it relates to a cooling and dust suppression mechanism for powder tanks in mixing plants. Background Technology

[0002] Concrete batching plants, as centralized concrete production facilities, use cement as a binder and precisely measure and mix aggregates such as sand, gravel, fly ash, and slag with admixtures. They are widely used in railway, highway, bridge, and municipal engineering construction. Due to their complex equipment, large footprint, and the dust and noise pollution generated during material transportation, storage, and mixing, they are typically located in suburban areas or far from residential areas. However, with increasingly stringent environmental standards, the environmental problems faced by traditional batching plants are becoming more prominent, especially dust control during powder storage and operation, which has become a key focus of industry governance.

[0003] Powdered raw materials such as cement and fly ash in concrete batching plants are typically stored in metal powder silos. During the pneumatic conveying and unloading of these powders, as well as the exhaust from the silos, large amounts of high-concentration dust are generated. Simultaneously, the frequent entry and exit of large construction vehicles within the plant area easily disturbs existing dust, creating significant secondary dust pollution. This dust not only severely pollutes the working environment and affects the health of operators, but also fails to meet current national requirements for air pollution control, becoming one of the main bottlenecks to achieving environmental compliance for concrete batching plants.

[0004] Furthermore, according to railway engineering construction technical specifications, when the average daily outdoor temperature exceeds 30℃, concrete construction should be managed according to summer high-temperature conditions. It is specifically stipulated that the temperature of cement entering the mixer should not exceed 40℃ to prevent quality problems such as premature hydration, increased slump loss, and increased risk of cracking due to overheating of the cementitious materials. Currently, most mixing plants adopt measures such as avoiding construction during high-temperature periods, cooling the mixing water with ice water, or spraying water to cool sand and gravel piles. However, for powder materials such as cement and fly ash stored in sealed metal tanks, natural heat dissipation is still generally relied upon, lacking active cooling methods.

[0005] Due to the poor thermal conductivity and large heat capacity of metal tanks, heat absorbed during the day dissipates slowly at night. Especially in high-temperature areas during summer, even after cooling overnight, the temperature of the powder inside the tank often remains above 40°C, severely affecting the control of concrete discharge temperature. Existing spray cooling methods are mostly fixed direct spraying or manual watering, resulting in uneven coverage. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a cooling and dust suppression mechanism for powder tanks in mixing plants, which solves the problem that existing spray cooling methods are mostly fixed direct spraying or manual watering, resulting in uneven coverage.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A cooling and dust suppression mechanism for powder tanks in a mixing plant includes:

[0009] Powder tank assembly, spraying mechanism and liquid supply mechanism;

[0010] The powder tank assembly includes several powder tanks arranged in an array along the left-right direction;

[0011] The spraying mechanism includes a support assembly and a spraying assembly;

[0012] The support assembly includes a support frame and a mounting frame that are fixedly connected from top to bottom. The lower end of the mounting frame is fixedly installed on the ground where the powder tank is located, and the support frame is located on the upper part of the powder tank assembly.

[0013] The spray assembly includes an annular spray pipe and a rocker arm type spray head;

[0014] The annular spray pipe is fixedly installed on the support frame. The projection of the annular spray pipe covers the distribution area of ​​the powder tank group. The liquid supply mechanism is set on one side of the powder tank group. The liquid supply port of the liquid supply mechanism is connected to the liquid inlet of the annular spray pipe through a pipeline.

[0015] The lower end of the annular spray pipe has several liquid outlets arranged in a circumferential array. Each of the liquid outlets of the annular spray pipe is connected to a rocker arm type nozzle. The spray direction of the rocker arm type nozzle is towards the outer wall of the powder tank group. The rocker arm type nozzle is used to reciprocate and swing to spray the outer wall of several powder tanks.

[0016] Furthermore, the support frame is a ring track frame, and there are two mounting frames. The upper ends of the two mounting frames are fixedly connected to the left and right ends of the ring track frame, respectively, and the upper end of the ring spray pipe is fixedly connected to the ring track frame.

[0017] Furthermore, the liquid supply mechanism includes a liquid storage tank, a liquid supply pump, and a liquid delivery pipe connected in sequence. The liquid storage tank and the liquid supply pump are both installed on the ground where the powder tank is located. The outlet of the liquid delivery pipe is connected upward to the inlet of the annular spray pipe.

[0018] Furthermore, it also includes an auxiliary dust suppression component, which includes a liquid distribution pipe and an atomizing nozzle;

[0019] The liquid distribution tubes are arranged in an array along the front-to-back direction. The liquid distribution tubes are fixedly connected inside the annular spray tube and extend in the left-to-right direction. The left and right ends of the liquid distribution tubes are respectively connected to the left and right inner walls of the annular spray tube. Several atomizing nozzles are arrayed and connected on the inner top wall of each liquid distribution tube. The spray outlet of the atomizing nozzles faces the top of the powder tank.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This solution utilizes a combination of annular spray pipes and rocker-arm nozzles to spray water onto the upper part of the powder tank, creating a heat exchange path where water flows down the wall. This efficient water flow removes heat accumulated in the powder tank due to sunlight and its own heat dissipation. The horizontal reciprocating spray directly targets the outer wall of the powder tank, while the fan-shaped coverage of the rocker-arm nozzles ensures more comprehensive and uniform cooling of the tank. As the water flows along the tank wall, it effectively removes heat from the tank, indirectly reducing the temperature of the powder inside. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0023] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0024] Figure 3 This is a partial structural schematic diagram of Embodiment 2 of this utility model.

[0025] Figure 4 yes Figure 3 A magnified structural diagram at point B in the middle.

[0026] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0027] Powder tank assembly 1, powder tank 11, spraying mechanism 2, support frame 21, mounting frame 22, annular spray pipe 23, rocker arm type nozzle 24, liquid supply mechanism 3, liquid storage tank 31, liquid supply pump 32, liquid delivery pipe 33, auxiliary dust suppression component 4, liquid distribution pipe 41, atomizing nozzle 42. Detailed Implementation

[0028] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0029] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Example 1:

[0032] As attached Figure 1 To be continued Figure 2 As shown:

[0033] This utility model provides a cooling and dust suppression mechanism for powder tanks in a mixing plant, comprising:

[0034] Powder tank assembly 1, spraying mechanism 2, and liquid supply mechanism 3;

[0035] The powder tank group 1 includes several powder tanks 11 arranged in an array along the left and right direction;

[0036] The spraying mechanism 2 includes a support assembly and a spraying assembly;

[0037] The support assembly includes a support frame 21 and a mounting frame 22 that are fixedly connected from top to bottom. The lower end of the mounting frame 22 is fixedly installed on the ground where the powder tank 11 is located, and the support frame 21 is located on the upper part of the powder tank group 1.

[0038] The spray assembly includes an annular spray pipe 23 and a rocker arm type nozzle 24;

[0039] The annular spray pipe 23 is fixedly installed on the support frame 21. The projection of the annular spray pipe 23 covers the distribution area of ​​the powder tank group 1. The liquid supply mechanism 3 is set on one side of the powder tank group 1. The liquid supply port of the liquid supply mechanism 3 is connected to the liquid inlet of the annular spray pipe 23 through a pipeline.

[0040] The lower end of the annular spray pipe 23 is circumferentially arrayed with several liquid outlets. Each of the liquid outlets of the annular spray pipe 23 is connected to a rocker arm nozzle 24. The spraying direction of the rocker arm nozzle 24 is towards the outer wall of the powder tank group 1. The rocker arm nozzle 24 is used to reciprocate and swing to spray the outer walls of several powder tanks 11.

[0041] In this embodiment, the support frame 21 is suspended above the powder tank assembly 1, the annular spray pipe 23 surrounds the upper periphery of the powder tank assembly 1, the spray end of the rocker arm nozzle 24 faces the upper end of the outer wall of the powder tank assembly 1, and performs reciprocating spraying in the horizontal direction. The rocker arm nozzle 24 is model 2993 rocker arm nozzle 24, 360° controllable angle copper nozzle rocker arm nozzle 24, with a reversing mechanism, and can perform arbitrary fan-shaped spraying.

[0042] As a preferred embodiment, the support frame 21 is a ring track frame, and two mounting frames 22 are provided. The upper ends of the two mounting frames 22 are fixedly connected to the left and right ends of the ring track frame, respectively, and the upper end of the ring spray pipe 23 is fixedly connected to the ring track frame.

[0043] In this embodiment, the mounting frame 22 is in the form of a triangular truss and is equipped with multi-layered annular connecting beams and guy ropes / diagonal braces (not shown in the figure), which can greatly improve the resistance to lateral torsion and wind load. For the method of fixing the upper end of the annular sprinkler pipe 23 to the annular track frame, in this embodiment, a perforated saddle plate (also called a base plate or pad) can be pre-welded onto the annular track frame. The curvature of the saddle plate should preferably match the outer diameter of the annular track frame. Select a U-bolt (or pipe clamp) of appropriate size, whose inner diameter should be slightly larger than the outer diameter of the annular sprinkler pipe 23. Pass the U-bolt across the sprinkler pipe, with both ends passing through the holes in the saddle plate. Put anti-loosening washers on both ends of the U-bolt and then tighten it with nuts.

[0044] As a preferred embodiment, the liquid supply mechanism 3 includes a liquid storage tank 31, a liquid supply pump 32, and a liquid delivery pipe 33 connected in sequence. The liquid storage tank 31 and the liquid supply pump 32 are both installed on the ground where the powder tank 11 is located. The liquid outlet of the liquid delivery pipe 33 is connected upward to the liquid inlet of the annular spray pipe 23.

[0045] In this embodiment, the storage tank 31, the supply pump 32, and the delivery pipe 33 are all located on the right side of the powder tank group 1. The storage tank 31 stores tap water, which is supplied to the inlet at the right end of the annular spray pipe 23 through the supply pump 32 and the delivery pipe 33. The inlet of the storage tank 31 is connected to a tap water pipe. Specifically, a drainage ditch is set around the ground outside the powder tank group 1. The water collected in the drainage ditch is introduced into an external three-stage sedimentation tank. After sedimentation and filtration, the upper clear water can be pumped back to the storage tank 31 for recycling. Specifically, a liquid level sensor (optional float type, capacitive type, or ultrasonic type) is installed in the storage tank 31, including setting two key points: low water level (start water replenishment) and high water level (stop water replenishment). Water replenishment solenoid valve: A normally closed solenoid valve is installed on the inlet pipe of the storage tank 31, which is connected to the external tap water pipe. This device is also equipped with a control system. The main controller of the system (such as a PLC or a dedicated control cabinet) receives the signal from the liquid level sensor and controls the opening and closing of the water replenishment solenoid valve.

[0046] Furthermore, a temperature sensor is installed on each powder tank 11 to monitor the temperature of the tank wall or the powder inside the tank in real time; a humidity sensor and a dust monitor are installed on site.

[0047] Example 2:

[0048] Example 2 is basically as shown in the attached document. Figure 3 To be continued Figure 4 As shown:

[0049] The remaining features of Embodiment 2 are the same as those of Embodiment 1, except that Embodiment 2 also includes an auxiliary dust suppression component 4, which includes a liquid distribution pipe 41 and an atomizing nozzle 42.

[0050] The liquid distribution pipes 41 are arranged in an array along the front-to-back direction. The liquid distribution pipes 41 are fixedly connected inside the annular spray pipe 23 and extend in the left-to-right direction. The left and right ends of the liquid distribution pipes 41 are respectively connected to the left and right inner walls of the annular spray pipe 23. Several atomizing nozzles 42 are arrayed and connected on the inner top wall of each liquid distribution pipe 41. The spray outlet of the atomizing nozzles 42 faces the top of the powder tank 11.

[0051] In this embodiment, the liquid distribution pipe 41 is an upwardly convex frame-shaped pipe, installed above the powder tank group 1. Through the combined use of the liquid distribution pipe 41 and the atomizing nozzles 42, it is mainly used for dust suppression and auxiliary cooling, specifically targeting the top area of ​​each powder tank 11 (especially around the inlet, breather valve, etc.). This set of atomizing nozzles 42 uses solid cone atomizing nozzles 42. Water flow within the nozzle passes through swirling blades, generating centrifugal force and forming a vortex. After being sprayed from the nozzle, it forms a fine water mist filling the entire cone-shaped area. Nozzles that can produce even finer water mist form a "water mist hood," effectively suppressing dust overflow and providing uniform coverage. The water mist distribution within the entire cone cross-section is very uniform, easily combining with dust particles and causing them to settle. Combined with the rocker-arm type spray head 24, it performs horizontal reciprocating spraying towards the upper outer wall of the tank. The downward flow of water efficiently removes heat from the tank, achieving comprehensive coverage while perfectly solving both cooling and dust suppression.

[0052] The annular spray pipe 23, the liquid distribution pipe 41, the rocker arm spray head 24, and the atomizing nozzle 42 are all made of stainless steel (such as 304SS), which fundamentally solves the corrosion problem and extends the service life of the equipment.

[0053] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A cooling and dust reduction mechanism for a powder tank of a mixing station, characterized in that, include: Powder tank assembly (1), spraying mechanism (2), and liquid supply mechanism (3); The powder tank group (1) includes several powder tanks (11) arranged in an array along the left and right direction; The spraying mechanism (2) includes a support assembly and a spraying assembly; The support assembly includes a support frame (21) and a mounting frame (22) that are fixedly connected from top to bottom. The lower end of the mounting frame (22) is fixedly installed on the ground where the powder tank (11) is located, and the support frame (21) is located on the upper part of the powder tank group (1). The spray assembly includes an annular spray pipe (23) and a rocker arm type nozzle (24); The annular spray pipe (23) is fixedly installed on the support frame (21). The projection of the annular spray pipe (23) covers the distribution area of ​​the powder tank group (1). The liquid supply mechanism (3) is set on one side of the powder tank group (1). The liquid supply port of the liquid supply mechanism (3) is connected to the liquid inlet of the annular spray pipe (23) through a pipeline. The lower end of the annular spray pipe (23) is circumferentially arrayed with several liquid outlets. Each of the liquid outlets of the annular spray pipe (23) is connected to a rocker arm nozzle (24). The spraying direction of the rocker arm nozzle (24) is towards the outer wall of the powder tank group (1). The rocker arm nozzle (24) is used to perform reciprocating swing spraying on the outer wall of several powder tanks (11).

2. The cooling and dust suppression mechanism for powder tanks in a mixing plant as described in claim 1, characterized in that: The support frame (21) is a ring track frame, and there are two mounting frames (22). The upper ends of the two mounting frames (22) are fixedly connected to the left and right ends of the ring track frame, respectively. The upper end of the ring spray pipe (23) is fixedly connected to the ring track frame.

3. The cooling and dust suppression mechanism for powder tanks in a mixing plant as described in claim 1, characterized in that: The liquid supply mechanism (3) includes a liquid storage tank (31), a liquid supply pump (32) and a liquid delivery pipe (33) connected in sequence. The liquid storage tank (31) and the liquid supply pump (32) are both installed on the ground where the powder tank (11) is located. The outlet of the liquid delivery pipe (33) is connected upward to the inlet of the annular spray pipe (23).

4. The cooling and dust suppression mechanism for powder tanks in a mixing plant as described in claim 1, characterized in that: It also includes an auxiliary dust suppression component (4), which includes a liquid distribution pipe (41) and an atomizing nozzle (42); The liquid distribution pipe (41) is arranged in an array along the front-back direction. The liquid distribution pipe (41) is fixedly connected inside the annular spray pipe (23) and extends in the left-right direction. The left and right ends of the liquid distribution pipe (41) are respectively connected to the left and right inner walls of the annular spray pipe (23). Several atomizing nozzles (42) are arrayed and connected on the inner top wall of each liquid distribution pipe (41). The spray outlet of the atomizing nozzle (42) faces the top of the powder tank (11).

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