A powder scale air-permeable cloth bag moisture-proof device

Abstract

The utility model belongs to powder scale cloth bag rainproof and moistureproof technical field of asphalt mixing station, disclose a kind of powder scale breathable cloth bag moistureproof device, the moistureproof device moistureproof cover, moistureproof cover is fixed in the top surface of asphalt mixing station workbench plate by fixed plate, powder scale breathable cloth bag is fixed in the inboard of moistureproof cover, the top surface of moistureproof cover is fixed with one-way valve, air enters moistureproof cover by one-way valve. The utility model has the beneficial effects that: by moistureproof cover, powder scale cloth bag can be protected from rain erosion, reduce the situation that powder is blocked due to dampening and plugging cloth bag, make the metering and emptying of powder scale more smooth, reduce the secondary start caused by powder scale cloth bag blockage, save production cost, improve powder scale cloth bag utilization rate, reduce replacement cycle.

Description

Technical Field

[0001] This utility model belongs to the technical field of rainproof and moisture-proof cloth bags for powder scales in asphalt mixing plants, and particularly relates to a moisture-proof device for a breathable cloth bag for powder scales. Background Technology

[0002] Current technology lacks effective moisture-proofing measures for the filter bags of powder scales in asphalt mixing plants. The only solution is to manually climb to the powder scales in the mixing plant when the bags become severely damp, and use a hammer to loosen the clumps of dust, increasing air permeability, or simply replace the bags with new ones. This approach reduces production efficiency, increases production costs, and shortens the lifespan of the filter bags. Furthermore, because the humidity of the bags cannot be controlled, the increased moisture after rain and dampness causes dust to adhere and clog the bags during operation, reducing air permeability and hindering airflow. This leads to a decrease in powder metering and evacuation speed, disrupting normal production. Summary of the Invention

[0003] The purpose of this utility model embodiment is to provide a moisture-proof device for a breathable cloth bag for powder weighing, which aims to solve the technical problem that the cloth bag becomes damp after being exposed to rain and moisture, causing dust to stick and clog the bag during operation, reducing its breathability, thus making it difficult for air to enter and exit, reducing the metering and emptying speed of powder, and delaying normal production.

[0004] The present invention is implemented as follows:

[0005] A moisture-proof device for a powder weighing bag is provided. The moisture-proof device is a moisture-proof cover, which is fixed to the top surface of the asphalt mixing plant workbench by a fixing plate. The powder weighing bag is fixed to the inside of the moisture-proof cover. A one-way valve is fixed to the top surface of the moisture-proof cover, and air enters the moisture-proof cover through the one-way valve.

[0006] Furthermore, a U-shaped hook is welded to the inner side of the moisture-proof cover, and a rope is sewn to the outer side of the breathable cloth bag for fixing. The rope is tied to the U-shaped hook.

[0007] Furthermore, a filter layer is provided between the breathable cloth bag of the powder scale and the top surface of the moisture-proof cover.

[0008] Furthermore, the filter layer comprises multiple layers of polyester nonwoven fabric, with activated carbon laid between adjacent polyester nonwoven fabrics. The filter layer is disc-shaped, and the circumference of the disc-shaped filter layer is fixed to the inner side of the top surface of the moisture-proof cover or the inner wall surface of the moisture-proof cover by bolts.

[0009] Furthermore, the moisture-proof cover has a wall thickness of 2 mm, and a nut is welded to the inner side of the top surface of the moisture-proof cover. The one-way valve passes through the top surface of the moisture-proof cover and is threaded into the nut.

[0010] Furthermore, the check valve is a ball-type check valve.

[0011] Furthermore, the fixing plate is a circular fixing plate, which is welded to the bottom of the moisture-proof cover; several fixing holes are evenly distributed around the middle circumference of the fixing plate, and the fixing bolts pass through the fixing holes and are threaded to the top surface of the asphalt mixing plant workbench.

[0012] The positive effects of this utility model are: the moisture-proof cover can protect the powder scale bag from rainwater erosion, reduce the occurrence of powder clumping and clogging the bag due to moisture, make the powder scale metering and emptying smoother, reduce the need for secondary start-ups due to powder scale bag blockage, save production costs, improve the utilization rate of powder scale bag, and reduce replacement cycle. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of a breathable cloth bag moisture-proof device for powder scales according to this utility model;

[0014] Figure 2 yes Figure 1 The image shown is a top view of a breathable cloth bag moisture-proof device for a powder scale according to this utility model.

[0015] Figure 3 yes Figure 2 The figure shown is a cross-sectional view of a breathable cloth bag moisture-proof device for powder scales according to this utility model.

[0016] Legend: 1—Fixing hole, 2—Fixing plate, 3—Moisture cover, 4—One-way valve, 5—Top surface, 6—Filter layer, 7—Breathable cloth bag, 8—Asphalt mixing plant workbench. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are 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 are not intended to 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.

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] like Figure 1 The diagram shown is a structural diagram of a moisture-proof device for a powder weighing breathable cloth bag provided in an embodiment of this utility model. It includes a moisture-proof cover 3, which is fixed to the top surface of the asphalt mixing plant workbench by a fixing plate 2. The powder weighing breathable cloth bag is fixed inside the moisture-proof cover, and a one-way valve is fixed to the top surface of the moisture-proof cover.

[0021] In this embodiment of the invention, the breathable cloth bag of the powder scale is fixed inside the moisture-proof cover, isolating it from the outside environment. Air can only be drawn in through the one-way valve when needed for operation. This effectively reduces the area and time that the breathable cloth bag is in contact with humid air inside the moisture-proof cover, protecting the cloth bag from rainwater erosion, reducing the occurrence of powder clumping and clogging the cloth bag due to moisture, making the powder scale's metering and emptying smoother, reducing the need for secondary startups due to cloth bag blockage, saving production costs, improving the utilization rate of the cloth bag, and reducing the replacement cycle.

[0022] The breathable cloth bag for the powder scale is fixed to the inside of the moisture-proof cover. Specifically, a U-shaped hook is welded to the inside of the moisture-proof cover, and a rope is sewn to the outside of the breathable cloth bag for the powder scale. When fixing, the rope is tied to the U-shaped hook.

[0023] Preferably, a filter layer is provided between the breathable cloth bag of the powder weighing device and the top surface 5 of the moisture-proof cover. The filter layer includes multiple layers of polyester (PET) non-woven fabric, and activated carbon is laid between adjacent polyester (PET) non-woven fabrics. The filter layer is disc-shaped, and the circumference of the disc-shaped filter layer is fixed to the inner side of the top surface 5 of the moisture-proof cover or the inner wall of the moisture-proof cover by bolts.

[0024] Preferably, the moisture-proof cover has a wall thickness of 2 mm, and a nut is welded to the inner side of the top surface 5 of the moisture-proof cover. The one-way valve passes through the top surface 5 of the moisture-proof cover and is threaded into the nut.

[0025] The one-way valve 4 is a ball check valve. The valve core of the ball check valve is a free-floating ball, and the valve seat is a conical or flat structure. Working principle: When the flow is forward, the fluid pushes the ball away from the valve seat; when the flow is reverse, the ball returns to its original position and blocks the flow channel.

[0026] A check valve is a type of valve that allows fluid (gas or liquid) to flow in one direction only and prevents reverse flow. It is widely used in hydraulic systems, pneumatic systems, and piping systems. Mechanical check valves rely on the fluid's own pressure to open and close, requiring no external control.

[0027] The moisture cover 3 is fixed to the top surface of the asphalt mixing plant workbench by a fixing plate 2. The fixing plate is a circular fixing plate and is welded to the bottom of the moisture cover 3. Several fixing holes 1 are evenly distributed around the middle circumference of the fixing plate. The fixing bolts pass through the fixing holes 1 and are threaded to the top surface of the asphalt mixing plant workbench.

[0028] The moisture cover 3 is cylindrical and is made of galvanized iron sheet.

[0029] In practice:

[0030] 1. Use 1.5mm or 2mm galvanized iron sheet, cut and rivet it, roll it into a cylindrical moisture cover 3, and make a reserved hole on the top surface 5.

[0031] 2. Then it is assembled with the DN25 mechanical ball check valve 4. After assembly, the joint gaps are filled with polyurethane sealant.

[0032] 3. Finally, assemble the device with the powder weighing bag and fix it to the bottom flange bolts of the powder weighing bag.

[0033] Working principle: The moisture-proof cover is fully enclosed to prevent rain and moisture, while the one-way valve for air intake and exhaust can maintain a ventilation channel without affecting the normal operation of the cloth bag.

[0034] The foregoing has broadly outlined some aspects and features of the various embodiments and should be interpreted as merely illustrative of potential applications. Other beneficial results can be obtained by applying the disclosed information in different ways or by combining aspects of the disclosed embodiments. Further aspects and a more complete understanding can be obtained based on the detailed description of exemplary embodiments with reference to the accompanying drawings, within the scope defined by the claims.

[0035] The above embodiments provide a detailed description of the present invention. Of course, the above description is not intended to limit the present invention, nor is the present invention limited to the examples described above. Any changes, modifications, additions, reductions, or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A breathable cloth bag moisture-proof device for powder scales, characterized in that, The moisture-proof device is a moisture-proof cover, which is fixed to the top surface of the asphalt mixing plant workbench by a fixing plate. The powder scale breathable cloth bag is fixed inside the moisture-proof cover. A one-way valve is fixed on the top surface of the moisture-proof cover, and air enters the moisture-proof cover through the one-way valve.

2. The moisture-proof device for a breathable cloth bag for a powder scale according to claim 1, characterized in that, The moisture-proof cover has a U-shaped hook welded to its inner side, and the breathable cloth bag for powder weighing is sewn with a rope on its outer side. When fixing, the rope is tied to the U-shaped hook.

3. The moisture-proof device for a breathable cloth bag for a powder scale according to claim 2, characterized in that, A filter layer is provided between the breathable cloth bag of the powder scale and the top surface of the moisture-proof cover.

4. The moisture-proof device for a breathable cloth bag for a powder scale according to claim 3, characterized in that, The filter layer comprises multiple layers of polyester nonwoven fabric, with activated carbon laid between adjacent polyester nonwoven fabrics. The filter layer is disc-shaped, and the circumference of the disc-shaped filter layer is fixed to the inner side of the top surface of the moisture-proof cover or the inner wall surface of the moisture-proof cover by bolts.

5. A moisture-proof device for a breathable cloth bag for powder weighing according to any one of claims 1 to 4, characterized in that, The moisture-proof cover has a wall thickness of 2 mm, and a nut is welded to the inner side of the top surface of the moisture-proof cover. The one-way valve passes through the top surface of the moisture-proof cover and is threaded into the nut.

6. The moisture-proof device for a breathable cloth bag for powder weighing according to claim 5, characterized in that, The check valve is a ball-type check valve.

7. The moisture-proof device for a breathable cloth bag for a powder scale according to claim 5, characterized in that, The fixing plate is a circular fixing plate, which is welded to the bottom of the moisture-proof cover; several fixing holes are evenly distributed around the middle circumference of the fixing plate, and the fixing bolts pass through the fixing holes and are threaded to the top surface of the asphalt mixing plant workbench.

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