A multi-stage air supply device

Abstract

The present invention provides a multi-stage air supply device, which includes a fan unit, a first-stage variable-diameter static pressure box, an air supply temperature and humidity detector, a pressurizing fan, a plurality of second-stage variable-diameter static pressure boxes, and an air outlet pipe. The first-stage variable-diameter static pressure box is connected to the fan unit through a main air supply pipe. A plurality of second-stage variable-diameter static pressure boxes are correspondingly connected to the first connection port of the first-stage variable-diameter static pressure box through air supply branch pipes. One end of the air outlet pipe is closed, and the other end is connected to the second connection port of the second-stage variable-diameter static pressure box. The air outlet pipe is arranged above the conveying equipment along the extension direction of the conveying equipment for materials, and the air outlet on the air outlet pipe faces the materials, and the outgoing air and the edge of the conveying equipment enclose a temperature and humidity control area. The setting of the two-stage variable-diameter static pressure box facilitates the interspersed layout of the pipeline among other equipment and facilitates the control of the air output volume to adjust and control the environmental temperature and humidity during the material conveying process, reduce energy consumption, and achieve local environmental temperature and humidity control.

Description

Technical Field

[0001] The present invention belongs to the technical field of air supply equipment, and particularly relates to a multi-stage air supply device. Background Art

[0002] In the process flows of various industries and enterprises, materials need to flow through different factories and workshops, and sometimes need to continuously pass through multiple areas with different environmental temperatures and humidities. When there are strict process requirements for the temperature and moisture content of materials, such as material moisture absorption, drying, temperature difference deformation, static electricity, etc., it will have a series of impacts on the factory layout, process flow, production organization efficiency, etc. For another example, in the tobacco industry or related agricultural and sideline product processing industries, materials are very easy to absorb moisture or lose temperature and moisture in a short time, resulting in a decline in product quality, an increase in process breakage, and an increase in external dust emissions.

[0003] Technical problems in the engineering design of factory layout and the design of production process flow also include: the material logistics conveying line is closely connected with other process equipment and cannot be physically isolated separately. A conveying line with a small floor area and volume requires the implementation of environmental temperature and humidity control in the entire workshop, resulting in a contradiction between improving process efficiency and rising energy costs; after installing the conveying line on the overhead corridor between workshops, it is impossible to install the air supply and return devices of the HVAC system, or other problems such as building load-bearing and building insulation are derived; the longer the conveying line, the lower the air supply and return efficiency of the air conditioner, and the problem of sharp increase in energy consumption; when the conveying line passes through a narrow space, dust deposition is difficult to clean, and insects and mildew are prone to occur. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the existing air conditioning air supply system has high energy consumption in maintaining the temperature and humidity during the material conveying process.

[0005] For this purpose, the present invention provides a multi-stage air supply device, including

[0006] An air blower unit;

[0007] A primary variable-diameter static pressure box, connected to the air blower unit through a main air supply pipe; a plurality of first connection ports are opened on the box body of the primary variable-diameter static pressure box;

[0008] An air supply temperature and humidity detector, installed on the main air supply pipe;

[0009] A pressurized blower, arranged in parallel on the main air supply pipe;

[0010] A plurality of secondary variable-diameter static pressure boxes, correspondingly connected to the first connection ports through air supply branch pipes; at least one second connection port is opened on the box body of any one of the secondary variable-diameter static pressure boxes;

[0011] The air outlet pipe, one end of which is closed and the other end is connected to the second connection port; the air outlet pipe is arranged above the conveying equipment along the extension direction of the material conveying equipment; any one of the air outlet pipes is provided with an air outlet; the air outlet faces the material and the emitted air and the edge of the conveying equipment enclose a temperature and humidity control area;

[0012] Both the first connection port and the second connection port have multiple calibers and / or multiple port shapes, and the corresponding air supply branch pipes and the air outlet pipes have matching pipe shapes.

[0013] The air outlet pipe is arranged above the conveying equipment parallel to the traveling path of the material.

[0014] The air outlet pipe is arranged directly above the conveying equipment parallel to the traveling path of the material.

[0015] The air outlet is a slit air outlet or a mesh slit air outlet.

[0016] It further includes a working condition temperature and humidity detector, which is fixed on the secondary variable diameter static pressure box and is suitable for detecting the temperature and humidity in the temperature and humidity control area.

[0017] The port shapes of the first connection port and the second connection port are circular, oval or square; correspondingly, the air supply branch pipes and the air outlet pipes are circular pipes, oval pipes or square pipes.

[0018] The air supply unit is an air conditioning unit.

[0019] The air conditioning unit does not have a return air structure.

[0020] It further includes:

[0021] A cleaning device, which is suitable for cleaning the dust on the surface of the multi-stage air supply device.

[0022] The air supply main pipe, the air supply branch pipes and the air outlet pipes are made of fiber materials.

[0023] The technical solution of the present invention has the following advantages:

[0024] 1. The present invention provides a multi-stage air supply device, comprising an air supply unit, a first-stage variable-diameter static pressure box, an air supply temperature and humidity detector, a pressurized fan, a plurality of second-stage variable-diameter static pressure boxes and an air outlet pipe. The first-stage variable-diameter static pressure box is connected to the air supply unit through an air supply main pipe, and a plurality of second-stage variable-diameter static pressure boxes are correspondingly connected to the first connection port of the first-stage variable-diameter static pressure box through an air supply branch pipe. One end of the air outlet pipe is closed, and the other end is connected to the second connection port of the second-stage variable-diameter static pressure box. The air outlet pipe is arranged above the conveying equipment along the extension direction of the material conveying equipment. The air outlet on the air outlet pipe faces the material, and the outgoing wind and the edge of the conveying equipment form a temperature and humidity control area. The arrangement of the two-stage variable-diameter static pressure box facilitates the interlaced arrangement of pipelines between other equipment and facilitates the control of the air outlet volume, so as to adjust and control the ambient temperature and humidity of the material conveying process, reduce energy consumption, and achieve local ambient temperature and humidity control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of the multi-stage air supply device of the present invention;

[0027] Figure 2 This is a schematic structural diagram of a first-stage variable-diameter static pressure box in a multi-stage air supply device of the present invention;

[0028] Figure 3 Schematic diagram of the distribution of air outlet pipes in the multi-stage air supply device of the present invention Figure 1 ;

[0029] Figure 4 Schematic diagram of the distribution of air outlet pipes in the multi-stage air supply device of the present invention Figure 2 .

[0030] Description of reference numerals:

[0031] 1-air conditioning unit; 2-first-stage variable-diameter static pressure box; 21-first connection port; 3-second-stage variable-diameter static pressure box; 31-second connection port; 4-air supply main pipe; 41-first connecting pipe; 5-air supply temperature and humidity detector; 6-pressurized fan; 7-air supply branch pipe; 71-second connecting pipe; 8-air outlet pipe; 81-air outlet; 9-control valve; 10-operating temperature and humidity detector. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] Embodiment 1

[0036] This embodiment provides a multi-stage air supply device, such as Figure 1As shown in the figure, it includes a blower unit, a first stepped static pressure box 2, a supply air temperature and humidity detector 5, a pressurizing fan 6, several second stepped static pressure boxes 3, and an outlet duct 8. The main supply air duct 4 is connected to the blower unit. In this embodiment, the blower unit is an air conditioning unit 1, which is suitable for modulating the outlet air with appropriate temperature and humidity. And in this embodiment, the air conditioning unit 1 does not have a return air structure, and the inlet air adopts 100% fresh air, reducing the problem of the occupied space of the return air structure. A supply air temperature and humidity detector 5 is provided on the main supply air duct 4 to detect the outlet air modulated by the air conditioning unit. A control valve 9 is also installed on the main supply air duct 4 to control the overall air volume. The first stepped static pressure box 2 is connected to the main supply air duct 4 through a first connecting pipe 41. According to the specific use environment, multiple first connecting pipes 41 can be connected to the main supply air duct 4, and multiple first stepped static pressure boxes 2 can be correspondingly provided. Multiple pressurizing fans 6 are arranged in parallel on the first connecting pipe 41 to increase the supply air pressure through the pressurizing fans 6, so as to transport the modulated air conditioning air to the distal outlet duct 8. A number of first connection ports 21 with different diameters and different opening shapes are provided on the first stepped static pressure box 2. Correspondingly, the supply air branch ducts 7 connected to the first stepped static pressure box 2 have pipe types matching the first connection ports 21, such as Figure 2 as shown in the figure, for example, circular pipes, elliptical pipes or square pipes, etc. Multiple second connecting pipes 71 can be connected to any one supply air branch duct 7, and second stepped static pressure boxes 3 are provided corresponding to the second connecting pipes 71 one by one. The second stepped static pressure boxes 3 are correspondingly arranged above the conveying equipment of the material. One end of the outlet duct 8 is closed, and the other end is connected to the second connection port 31 of the second stepped static pressure box 3. The second connection port 31 can also be set to have different diameters and different opening shapes. The corresponding outlet duct 8 is provided with a pipe type of the same diameter and shape, depending on the specific use environment, such as Figure 1 as shown in the figure, the outlet duct 8 is arranged parallel to the traveling path of the material above the conveying equipment, so that the material can receive the modulated air with the same temperature and humidity and the same air volume at any position during the conveying process. The outlet air of the outlet duct 8 and the edge of the conveying equipment enclose a temperature and humidity control area, such as Figure 3 as shown in the figure, the outlet duct 8 is arranged directly above the conveying equipment. The outlet openings 81 are arranged in multiple rows and distributed on the arc surface of the outlet duct 8 facing the material. The outlet air of the outlet duct 8 and the edge of the conveying equipment enclose a temperature and humidity control area with a trapezoidal cross-section. Such as Figure 4 as shown in the figure, the outlet duct 8 is arranged obliquely above the conveying equipment. At this time, the outlet air of the outlet duct 8 and the edge of the conveying equipment enclose a temperature and humidity control area with a triangular cross-section. In this embodiment, the outlet openings 81 are slit outlets or mesh slit outlets. A working condition temperature and humidity detector 10 is provided on the side wall of each second stepped static pressure box 3 to facilitate real-time detection of the temperature and humidity values in the corresponding temperature and humidity control area.

[0037] The main air supply pipe 4, the first connecting pipe 41, the air supply branch pipe 7, the second connecting pipe 71 and the air outlet pipe 8 are all made of fiber materials, which can effectively prevent the internal condensation or external condensation of the air conditioner air and can be directly cleaned with water.

[0038] The air blowing device (not shown in the figure) is arranged above or above the side of the multi-stage air supply device, and can be telescoped and slid, and is used to clean the dust on the air supply device. The air blowing device is a combination of a conventional air compressor and an air duct, and is configured as required. When the equipment installation space is limited or in elevated transportation, the surface cleaning and maintenance of various devices.

[0039] For example, due to the need for technological transformation in the factory due to the optimization of the process flow, and the production does not stop at the same time. It is necessary to build a new raw material processing workshop on the basis of the original three workshops of the raw material processing workshop, the packaging workshop, and the expansion processing workshop. After reaching production, the packaging workshop will be moved to the original raw material processing workshop. During the switching period between the old and new lines, it is necessary to build a temporary conveyor line that crosses three zones, with a length of 200 meters and a usage period of two years. And the pipelines in each workshop are densely arranged, and there are two overhead corridors between the workshops. It is required to ensure that the material temperature and moisture content during the transportation process meet the process requirements. At the same time, because the temporary conveyor line will be discarded after the technological transformation, it is required that the construction and use costs are relatively low.

[0040] Adopting this solution, using the original air conditioner unit with a capacity of 60,000 cubic meters per hour, closing its return air pipeline and sending air at the lowest fan drive frequency, setting two groups of pressurized fans 6, one group of pressurized fans 6 planar controls two corridors and three conveying devices located in the expansion workshop, with a total length of about 100 meters. Among them, inside the two corridors in contact with the outside world, the air supply volume of the end air outlet pipe 8 is set at 1.5-2 times that of other control sections; the other group of pressurized fans 6 is placed above the interlayer of the original material processing workshop, and a first-stage variable diameter static pressure box 2 is set. Above, it is connected to the main air supply pipe 4 through the first connecting pipe 41 with variable diameter to penetrate the complex pipeline layout. Below, it passes through the air supply branch pipe 7 and the second connecting pipe 71 to penetrate the interlayer and narrow space, and pressurizes and sends air downward. When necessary, the first-stage variable diameter static pressure box 2 changes the diameter continuously for many times to reach the end air outlet structure, and controls the air pressure and air volume of the conveying environment temperature and humidity control area of four conveying devices with a total length of about 100 meters. At appropriate positions in the interlayer and narrow space, install a retractable air compressor air blowing device for the cleaning and maintenance of the system.

[0041] In terms of temperature and humidity control parameters, use the working condition temperature and humidity detectors located in the two corridor sections as the main control monitoring points, and feed back the monitoring data to the air conditioner unit and adjust the parameters of the air supply temperature and humidity detectors; the working condition air supply volume of the system ≤ 15,000 cubic meters per hour.

[0042] The above technical solutions have achieved the technological goals, cost control goals, and production process management goals well. After the end of the technological transformation transition period, the end air outlet duct 8, the pressurized fan 6, and some of the air ducts can be reused for other factory building projects or process requirements.

[0043] For another example, due to the layout restrictions of the process flow in the factory, a kind of raw material after expansion treatment has a small density, is easy to fly, is easy to absorb moisture and odors. The process flow requires that its conveying process after processing is overhead and crosses the entire workshop for 60 meters. There are large wet sources and heat sources of other process devices distributed below the conveying channel, and there is also an odor source of about 20 meters for employees to take baths and change clothes, an open workshop logistics pedestrian passage of about 15 meters, and construction requirements including climbing upstairs and passing through the mezzanine. The total length of the conveying line exceeds 250 meters. The conventional process design uses the pneumatic conveying method, which is difficult to implement due to reasons such as large air pressure loss due to the long distance, inability to guarantee the material temperature and moisture content, and large losses and consumptions.

[0044] With the adoption of this technical solution, air is drawn from the storage room with temperature and humidity control functions at the end of the conveying section and led to three groups of pressurized fans 6 arranged in parallel over a long distance. Among them, independent end air outlet ducts 8 are provided for the overhead crossing of the heat source section, the odor section, and the open channel section, and the air supply volume is set at 2.5 - 3 times that of other control sections; the climbing angle of the conveying device, passing through the mezzanine, etc. are realized through the combined design of the first-stage reduced-diameter static pressure box 2, the main air supply pipe 4, the second-stage reduced-diameter static pressure box 3, and the air supply branch pipe 7; the end air outlet duct 8 preferably adopts a layout directly above the conveying device to form a shielding air jet at the outer edge of the local environmental temperature and humidity control area, and the wind speed is strictly limited to less than 0.5 m / s to avoid light materials being blown away and increasing environmental dust and material consumption; in the overhead crossing heat source section where the aerial platform vehicle cannot enter, and at appropriate positions in the narrow and small mezzanine space where it is difficult for personnel to enter and exit, a retractable air compressor cleaning device is installed, and combined with conventional video monitoring equipment, it is convenient to carry out the cleaning and maintenance of the system.

[0045] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A multi-stage air supply device, characterized in that: include: Air supply unit; A first-stage variable-diameter static pressure box (2) is connected to the air supply unit via an air supply main pipe (4); a plurality of first connection ports (21) are provided on the box body of the first-stage variable-diameter static pressure box (2); An air supply temperature and humidity detector (5) is installed on the air supply main pipe (4); A pressurized fan (6) is provided on the air supply main pipe (4); A plurality of secondary variable diameter static pressure boxes (3) are correspondingly connected to the first connection port (21) via air supply branch pipes (7); at least one second connection port (31) is provided on the box body of any of the secondary variable diameter static pressure boxes (3); An air outlet pipe (8) is closed at one end and connected to the second connection port (31) at the other end; the air outlet pipe (8) is arranged above the conveying device along the extension direction of the material conveying device; any of the air outlet pipes (8) is provided with an air outlet (81); the air outlet (81) faces the material and the outgoing air and the edge of the conveying device form a temperature and humidity control zone; within the temperature and humidity control zone, the operating air volume of the system is ≤15,000 cubic meters per hour; and the wind speed is strictly limited to below 0.5 meters per second; The cross section of the temperature and humidity control zone is arranged in a trapezoidal or triangular shape; It also includes a working condition temperature and humidity detector (10), which is fixed on the secondary variable diameter static pressure box (3) and is suitable for detecting the temperature and humidity in the temperature and humidity control area; The first connecting port (21) and the second connecting port (31) both have various calibers and / or various opening shapes, and the corresponding air supply branch pipe (7) and the air outlet pipe (8) both have matching pipe shapes.

2. The multi-stage air supply device according to claim 1, characterized in that: The air outlet pipe (8) is arranged above the conveying equipment in parallel with the travel path of the material.

3. The multi-stage air supply device according to claim 2, characterized in that: The air outlet pipe (8) is arranged parallel to the travel path of the material and directly above the conveying equipment.

4. The multi-stage air supply device according to claim 1, characterized in that: The air outlet (81) is a slit air outlet or a mesh air outlet.

5. The multi-stage air supply device according to claim 1, characterized in that: The openings of the first connecting port (21) and the second connecting port (31) are circular, elliptical or square; correspondingly, the air supply branch pipe (7) and the air outlet pipe (8) are circular tubes, elliptical tubes or square tubes.

6. The multi-stage air supply device according to claim 1, characterized in that: The air supply unit is an air conditioning unit (1).

7. The multi-stage air supply device according to claim 6, characterized in that: The air conditioning unit (1) is not provided with a return air structure.

8. The multi-stage air supply device according to claim 1, characterized in that: Also includes: The cleaning device is suitable for cleaning dust on the surface of the multi-stage air supply device.

9. The multi-stage air supply device according to any one of claims 1 to 8, characterized in that: The air supply main pipe (4), the air supply branch pipe (7) and the air outlet pipe (8) are made of fiber material.

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