Negative pressure weighing chamber with uniform internal airflow

Abstract

The utility model discloses a negative pressure weighing chamber with uniform internal air flow, which comprises a weighing chamber main body, a weighing chamber, an equipment chamber and a backflow chamber are arranged in the weighing chamber main body, the weighing chamber and the equipment chamber are communicated through a first mounting port, a fan is arranged in the equipment chamber, and the equipment chamber is communicated with the backflow chamber; the plurality of reflux filters are arranged in a second mounting opening in the partition plate at the top of the weighing chamber; the flow dividing inclined plates are arranged between the adjacent backflow filters, the upper ends of the flow dividing inclined plates extend towards the equipment cavity, the flow dividing inclined plates are obliquely arranged in the backflow cavity, and first mesh holes are formed in the flow dividing inclined plates; the air outlet plate is arranged on the outer surface of the weighing chamber main body, and second meshes are formed in the air outlet plate; the adjusting plate is arranged on the end face of the air outlet plate in a sliding mode, and third mesh holes are formed in the adjusting plate. According to the negative pressure weighing chamber, the problems that the purification efficiency and the purification degree in the weighing chamber are poor due to the fact that the uniformity of air flow in the weighing chamber in an existing negative pressure weighing chamber is poor can be solved.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure weighing chamber technology, specifically a negative pressure weighing chamber with uniform internal airflow. Background Technology

[0002] Negative pressure weighing chambers use a fan to create negative pressure within the weighing chamber, preventing the weighed material from being lifted by airflow and discharged, thus avoiding environmental pollution. The main airflow exits the weighing chamber, enters the equipment chamber where the fan is located, and then flows back into the weighing chamber, forming a circulating airflow. A small portion exits the weighing chamber through the exhaust plate, while a small portion replenishes the system, ensuring stable negative pressure and reducing the fan's workload. However, existing negative pressure weighing chambers suffer from poor airflow uniformity within the weighing chamber, hindering the capture and filtration of impurities. This results in poor purification efficiency and effectiveness within the weighing chamber. Utility Model Content

[0003] The purpose of this invention is to provide a negative pressure weighing chamber with uniform internal airflow in order to solve the problem that the airflow uniformity in the weighing chamber is poor, resulting in poor purification efficiency and degree.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a negative pressure weighing chamber with uniform internal airflow, comprising:

[0005] The weighing chamber body includes a weighing chamber, an equipment chamber, and a reflux chamber. A partition structure is provided at the entrance of the weighing chamber. The weighing chamber and the equipment chamber are connected through a first installation port. A filter is provided in the first installation port. A fan is provided on the partition in the equipment chamber. The fan is connected to the equipment chamber and the reflux chamber through through holes in several partitions.

[0006] Several reflux filters are arranged in the second mounting port on the partition plate at the top of the weighing chamber;

[0007] A diversion inclined plate is arranged between adjacent return filters, with its upper end extending toward the equipment chamber and inclinedly arranged in the return chamber, and a first mesh is provided on it;

[0008] An air outlet plate is provided on the outer surface of the weighing chamber body, downwind of the airflow in the return chamber, and has a second mesh.

[0009] An adjusting plate is slidably disposed at the end face of the air outlet plate, and a third mesh corresponding to the second mesh is provided on it.

[0010] As a further description of the above technical solution:

[0011] The partition structure is a soft curtain.

[0012] As a further description of the above technical solution:

[0013] Lighting fixtures are installed in the weighing chamber.

[0014] As a further description of the above technical solution:

[0015] A countersunk groove is provided on the side of the first mounting port facing the weighing chamber. A sealing plate is embedded in the countersunk groove. The sealing plate is provided with a fourth mesh and a slot is provided on its side edge. An insert plate is provided on one side of the countersunk groove. The insert plate is inserted into the slot and clamps and positions the side edge of the sealing plate together with the countersunk groove.

[0016] As a further description of the above technical solution:

[0017] A magnet is installed in the countersunk groove, and the magnet is embedded in and magnetically connected to the sealing plate.

[0018] As a further description of the above technical solution:

[0019] The baffle at the top of the weighing chamber is provided with a flow equalization membrane at the end face of the reflux filter.

[0020] As a further description of the above technical solution:

[0021] The reflux filter is a liquid tank filter with a liquid tank on its side edge. The liquid tank is inserted into an annular plate on the outside of the second mounting port, and a liquid tank rubber is embedded between the annular plate and the liquid tank.

[0022] As a further description of the above technical solution:

[0023] The return chamber is provided with a guide plate on the inner side of the air outlet plate. The adjustment plate is slidably disposed in the gap between the air outlet plate and the guide plate. A screw is provided on its outer end face. The screw passes through the waist-shaped hole on the air outlet plate and is screwed with a nut. The nut abuts against the outer surface of the air outlet plate.

[0024] In summary, by adopting the above technical solution, this utility model has the following advantages over the prior art:

[0025] Beneficial effects:

[0026] 1. When the negative pressure weighing chamber of this utility model is in use, the fan creates a negative pressure in the weighing chamber. Air is supplied into the weighing chamber through the gap between the soft curtain and the ground. The main airflow flows out of the weighing chamber through the first installation port. The filtered airflow flows through the equipment chamber and the return chamber. Guided by the diversion inclined plate, some airflow is pressed down and flows to the return filter at the upwind port. Some airflow flows through the first mesh and downwind to the return filter, thereby improving the uniformity of the return airflow. After the two airflows pass through the flow equalization membrane, the distribution uniformity is further improved. They are then filtered twice by the return filter and returned to the weighing chamber. Some airflow is discharged through the air outlet plate.

[0027] 2. The two filters are easy to install and remove, have a tight fit, and have an extended service life.

[0028] 3. The airflow rate of the weighing chamber can be adjusted. Specifically, after loosening the nut, push the screw up and down to move the air outlet plate and the adjusting plate relative to each other. The second mesh and the third mesh are staggered or aligned, thereby adjusting the airflow rate of the negative pressure weighing chamber and making its internal negative pressure more stable. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a negative pressure weighing chamber with uniform internal airflow.

[0031] Figure 2 This is a magnified view of the first installation port in a negative pressure weighing chamber with uniform internal airflow.

[0032] Figure 3 This is a magnified view of a reflux filter and a flow divider in a negative pressure weighing chamber with uniform internal airflow.

[0033] Figure 4 This is a magnified view of the air outlet plate and regulating plate in a negative pressure weighing chamber with uniform internal airflow.

[0034] Figure 5 This is a magnified view of the air outlet plate in a negative pressure weighing chamber with uniform internal airflow.

[0035] Legend:

[0036] 1. Weighing chamber main body; 2. Weighing chamber; 3. Equipment chamber; 4. Reflux chamber; 5. Partition structure; 6. First mounting port; 7. Fan; 8. Second mounting port; 9. Reflux filter; 10. Diverting inclined plate; 11. First mesh; 12. Second mesh; 13. Adjusting plate; 14. Third mesh; 15. Lighting fixture; 16. Countersunk groove; 17. Sealing plate; 18. Fourth mesh; 19. Slot; 20. Insert plate; 21. Magnet; 22. Flow equalization membrane; 23. Annular plate; 24. Liquid tank; 25. Liquid tank rubber; 26. Guide plate; 27. Screw; 28. Waist-shaped hole; 29. ​​Nut. Detailed Implementation

[0037] 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 scope of protection of the present utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0039] Please see Figure 1-5 This utility model provides a technical solution: a negative pressure weighing chamber with uniform internal airflow, comprising:

[0040] The weighing chamber body 1 is provided with a weighing chamber 2, an equipment chamber 3, and a reflux chamber 4. A partition structure 5 is provided at the entrance of the weighing chamber 2. The weighing chamber 2 and the equipment chamber 3 are connected through a first installation port 6. A filter is provided in the first installation port 6. A fan 7 is provided on the partition in the equipment chamber 3. The fan 7 is connected to the equipment chamber 3 and the reflux chamber 4 through through holes in several partitions.

[0041] Several reflux filters 9 are arranged in the second mounting port 8 on the partition plate at the top of the weighing chamber 2;

[0042] The diversion ramp 10 is arranged between adjacent return filters 9, with its upper end extending toward the equipment chamber 3 and inclinedly arranged in the return chamber 4, and a first mesh 11 is provided on it; wherein, the included angle between the diversion ramp 10 and the upper air outlet side of the partition at the top of the weighing chamber 2 can be set to 45°.

[0043] An air outlet plate is provided on the outer surface of the weighing chamber body 1, downwind of the airflow in the return chamber 4, and a second mesh 12 is provided on it;

[0044] An adjusting plate 13 is slidably disposed at the end face of the air outlet plate, and a third mesh 14 corresponding to the second mesh 12 is provided on it.

[0045] The partition structure 5 is a soft curtain. This improves the convenience for operators to enter and exit the negative pressure weighing room, as well as the convenience and tightness of the entrance partition treatment.

[0046] A lighting fixture 15 is installed inside the weighing chamber 2. This facilitates weighing operations within the negative pressure weighing chamber.

[0047] A countersunk groove 16 is provided on the side of the first mounting port 6 facing the weighing chamber 2. A sealing plate 17 is embedded in the countersunk groove 16. The sealing plate 17 has a fourth mesh 18 and a slot 19 on its side edge. An insert plate 20 is provided on one side of the countersunk groove 16 and is inserted into the slot 19. The insert plate 20 and the countersunk groove 16 clamp and position the side edge of the sealing plate 17. A magnet 21 is provided in the countersunk groove 16 and is embedded in and magnetically connected to the sealing plate 17. After the filter is installed in the first mounting port 6, the sealing plate 17 is tilted and one side is inserted into the gap between the insert plate 20 and the countersunk groove 16. Then, the sealing plate 17 is pushed and fully embedded into the countersunk groove 16. The magnet 21 and the sealing plate 17 are magnetically attracted and positioned, completing the assembly.

[0048] The baffle at the top of the weighing chamber 2 is provided with a flow equalization membrane 22 at the end face of the return filter 9. This improves the uniformity of the airflow entering the return filter 9 and thus improving the uniformity of the airflow returning to the weighing chamber 2.

[0049] The return filter 9 is a liquid tank filter with a liquid tank 24 on its side edge. The liquid tank 24 is inserted into the annular plate 23 on the outside of the second mounting port 8, and a liquid tank rubber 25 is embedded between the annular plate 23 and the liquid tank 24. This improves the assembly tightness and service life of the return filter 9, thereby improving the filtration effect.

[0050] The reflux chamber 4 is provided with a guide plate 26 on the inner side of the air outlet plate. The adjusting plate 13 is slidably disposed in the gap between the air outlet plate and the guide plate 26. A screw 27 is provided on its outer end face. The screw 27 passes through the waist-shaped hole 28 on the air outlet plate and is screwed with a nut 29. The nut 29 abuts against the outer surface of the air outlet plate. After loosening the nut 29, the screw 27 is pushed up and down, causing the air outlet plate and the adjusting plate 13 to move relative to each other. The second mesh 12 and the third mesh 14 are misaligned or aligned, thereby adjusting the rate of airflow discharged from the negative pressure weighing chamber and making its internal negative pressure more stable.

[0051] The working principle of a negative pressure weighing chamber with uniform internal airflow in this embodiment includes: Figure 1 As shown by the middle arrow, the fan 7 creates a negative pressure in the weighing chamber 2, and air is supplied into the weighing chamber through the gap between the soft curtain and the ground. The main airflow flows out of the weighing chamber 2 through the first installation port 6. The filtered airflow flows through the equipment chamber 3 and the return chamber 4, and is guided by the diversion inclined plate 10. The local airflow is pressed down and flows to the return filter 9 at the upwind port, and part of the airflow flows through the first mesh 11 to the return filter 9 at the downwind port, thereby improving the uniformity of the return airflow. After the two airflows pass through the flow equalization membrane 22, the distribution uniformity is further improved, and they are filtered twice by the return filter 9 and returned to the weighing chamber 2. Part of the airflow is discharged through the air outlet plate.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A negative pressure weighing chamber with uniform internal airflow, characterized in that, include: The weighing chamber body includes a weighing chamber, an equipment chamber, and a reflux chamber. A partition structure is provided at the entrance of the weighing chamber. The weighing chamber and the equipment chamber are connected through a first installation port. A filter is provided in the first installation port. A fan is provided on the partition in the equipment chamber. The fan is connected to the equipment chamber and the reflux chamber through through holes in several partitions. Several reflux filters are arranged in the second mounting port on the partition plate at the top of the weighing chamber; A diversion inclined plate is arranged between adjacent return filters, with its upper end extending toward the equipment chamber and inclinedly arranged in the return chamber, and a first mesh is provided on it; An air outlet plate is provided on the outer surface of the weighing chamber body, downwind of the airflow in the return chamber, and has a second mesh. An adjusting plate is slidably disposed at the end face of the air outlet plate, and a third mesh corresponding to the second mesh is provided on it.

2. The negative pressure weighing chamber with uniform internal airflow according to claim 1, characterized in that, The partition structure is a soft curtain.

3. The negative pressure weighing chamber with uniform internal airflow according to claim 1, characterized in that, Lighting fixtures are installed in the weighing chamber.

4. The negative pressure weighing chamber with uniform internal airflow according to claim 1, characterized in that, A countersunk groove is provided on the side of the first mounting port facing the weighing chamber. A sealing plate is embedded in the countersunk groove. The sealing plate is provided with a fourth mesh and a slot is provided on its side edge. An insert plate is provided on one side of the countersunk groove. The insert plate is inserted into the slot and clamps and positions the side edge of the sealing plate together with the countersunk groove.

5. A negative pressure weighing chamber with uniform internal airflow according to claim 4, characterized in that, A magnet is installed in the countersunk groove, and the magnet is embedded in and magnetically connected to the sealing plate.

6. The negative pressure weighing chamber with uniform internal airflow according to claim 1, characterized in that, The baffle at the top of the weighing chamber is provided with a flow equalization membrane at the end face of the reflux filter.

7. A negative pressure weighing chamber with uniform internal airflow according to claim 1, characterized in that, The reflux filter is a liquid tank filter with a liquid tank on its side edge. The liquid tank is inserted into an annular plate on the outside of the second mounting port, and a liquid tank rubber is embedded between the annular plate and the liquid tank.

8. A negative pressure weighing chamber with uniform internal airflow according to claim 1, characterized in that, The return chamber is provided with a guide plate on the inner side of the air outlet plate. The adjustment plate is slidably disposed in the gap between the air outlet plate and the guide plate. A screw is provided on its outer end face. The screw passes through the waist-shaped hole on the air outlet plate and is screwed with a nut. The nut abuts against the outer surface of the air outlet plate.

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