Weighing platform exhaust hood

Abstract

The utility model discloses an exhaust hood for a weighing platform, which belongs to the technical field of auxiliary weighing appliances and comprises a weighing platform, a closed isolation hood fixed on the side surface of the top end of the weighing platform, a weighing balance placed on the side surface of the top end of the weighing platform, a pick-and-place opening arranged on the front surface of the closed isolation hood, and an adjusting component arranged on the front surface of the closed isolation hood. A flow equalizing plate is fixed in the closed isolation cover, a porous exhaust outlet is formed in the side face of the flow equalizing plate, and an exhaust pipe is fixed to the back face of the closed isolation cover; according to the utility model, poisonous and harmful gas is sucked through the porous exhaust outlet, so that the harmful gas is prevented from being inhaled into the body of a weighing person or escaping unorganized to pollute the whole room, and the size of the pick-and-place opening can be adjusted through the arranged adjusting assembly; therefore, poisonous and harmful gas in the closed isolation cover is prevented from escaping to the maximum extent while weighing is facilitated, surrounding air pollution is reduced, and when the weighing scale is not used, the taking and placing opening is closed and protected through the opening adjusting assembly, so that the weighing precision of the weighing scale is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing auxiliary tools, in particular to an exhaust cover for a weighing platform. Background Art

[0002] To prevent contamination of pharmaceuticals by dust particles and microorganisms, pharmaceutical production should be conducted in a clean environment. However, during the weighing and batching process, when powdered raw materials and auxiliary materials are weighed, dust is easily generated, polluting the surrounding area and affecting the quality of the drug. Traditional dust removal operations often install a protective cover on the weighing platform, with an exhaust port on top. The exhaust port is equipped with an exhaust duct and exhaust fan. Before weighing, the exhaust fan is turned on, creating a negative pressure above the weighing platform, which draws dust into the air duct to achieve the dust removal purpose.

[0003] For example, Chinese patent publication number CN203216594U discloses a one-way flow weighing platform, which includes a protective cover with an opening on the front side, a weighing platform arranged in the protective cover and an inclined ventilation plate located on the front lower side of the weighing platform, wherein the top of the protective cover is provided with a vertical air supply port, the weighing platform is densely covered with ventilation holes, the inclined ventilation plate is densely covered with dust suction holes, the upper end of the inclined ventilation plate is sealed with the front end of the weighing platform through a vertical baffle, the inclined ventilation plate, the weighing platform, the vertical baffle and the protective cover constitute a closed shell, the closed shell is provided with an air outlet, and the air outlet is located below the weighing platform.

[0004] There are still deficiencies in the above application. The entire front side of the protective cover in the above application is set to be open. During weighing, there is a risk that some dust in the protective cover will escape through the larger opening, which may easily cause certain damage to the weighing personnel and cause certain pollution to the surrounding air. At the same time, when not in use, dust and impurities in the external environment may easily fall onto the weighing balance through the larger opening, affecting the weighing accuracy of the weighing balance. The weighing balance needs to be cleaned frequently, which is inconvenient and cumbersome.

[0005] Therefore, it is necessary to provide a weighing table exhaust hood to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to provide an exhaust hood for a weighing platform to solve the problems raised in the above background technology.

[0007] In order to achieve the above-mentioned purpose, the solution of the utility model to solve the above-mentioned technical problems is as follows: a weighing platform exhaust hood, comprising a weighing platform, a closed partition cover is fixed on the top side of the weighing platform, a weighing balance located inside the closed partition cover is placed on the top side of the weighing platform, a take-in and put-out port is provided on the front of the closed partition cover, an adjustment component for adjusting the size of the take-in and put-out port is provided on the front of the closed partition cover, a flow equalizing plate is fixed inside the closed partition cover, a multi-porous exhaust port is provided on the side of the flow equalizing plate, an exhaust pipe connected to the multi-porous exhaust port is fixed on the back of the closed partition cover, and the exhaust pipe is externally connected to an exhaust fan.

[0008] As a further solution of the present invention, the flow balancing plate is located at the rear of the closed partition, the flow balancing plate is parallel to the rear side wall of the closed partition, and the distance between the flow balancing plate and the rear side wall of the closed partition is greater than 10 cm.

[0009] As a further solution of the present invention, the sides of the flow equalizing plate are arranged close to the inner wall of the partition, and a static pressure box is provided between the flow equalizing plate and the rear wall of the closed partition cover.

[0010] As a further solution of the present invention, the area of ​​the porous air outlet is larger than one quarter of the area of ​​the flow equalizing plate.

[0011] As a further solution of the present invention, the front solid side wall of the closed partition cover is set as the positive side wall, and the adjustment component includes an adjustment plate that slides in contact with the outer wall of the positive side wall, and two symmetrically distributed spring tongue plates are provided on the side of the adjustment plate. A round protrusion is fixed on the side of the spring tongue plate close to the positive side wall, and a card hole that fits with the round protrusion is opened on the side of the positive side wall. There are multiple card holes, and the multiple card holes are equidistantly distributed along the height direction of the closed partition cover.

[0012] As a further solution of the present invention, a T-shaped slide groove is arranged along the height direction of the closed partition cover on the outer wall of the main side wall, and a trapezoidal guide column that is slidably adapted to the T-shaped slide groove is fixed on the side of the adjustment plate close to the main side wall.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. By setting a closed shield on the outside of the weighing balance, the toxic and harmful airflow that escapes during weighing is reasonably organized to flow to the porous exhaust vents, and the exhaust fan is used to form negative pressure suction in the exhaust duct, thereby sucking out the toxic and harmful gases through the porous exhaust vents, preventing the harmful gases from being inhaled into the body by the weighing personnel or escaping in an unorganized manner to pollute the entire room. At the same time, the flow equalizing plate, porous exhaust vents and static pressure box are set to reduce the impact of the exhaust airflow on the weighing accuracy of the weighing balance. Compared with the existing protective cover, the efficiency of capturing harmful substances is improved and the risk of occupational exposure of workers is reduced.

[0015] 2. The size of the access opening can be adjusted by setting the adjustment component, so as to facilitate weighing while preventing the escape of toxic and harmful gases inside the closed cover to the greatest extent, reduce the damage to the weighing personnel, and reduce the surrounding air pollution. When not in use, the access opening can be closed by adjusting the component, thereby greatly reducing the dust and impurities in the external environment from falling onto the weighing balance, protecting the weighing balance, reducing the frequency of cleaning the weighing balance, and ensuring the weighing accuracy of the weighing balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0018] Figure 2 This is a side view of the overall structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the local structure of the adjustment component of the utility model Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the local structure of the adjustment component of the utility model Figure 2 .

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] 1. Weighing platform; 2. Enclosed shield; 3. Multi-hole exhaust vent; 4. Weighing balance; 5. Flow equalizing plate; 6. Exhaust duct; 7. Static pressure box; 8. Adjustment assembly; 801. Shifting plate; 802. Clamping hole; 803. Spring tongue plate; 804. T-shaped slide; 805. Round bump; 806. Trapezoidal guide column; 9. Positive side wall; 10. Take-in and put-out opening. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the embodiments.

[0024] See also Figure 1-4The utility model provides a weighing platform exhaust cover, comprising a weighing platform 1, a closed partition cover 2 is fixed on the top side of the weighing platform 1, a weighing balance 4 is placed on the top side of the weighing platform 1 and is located inside the closed partition cover 2, a take-out opening 10 is provided on the front of the closed partition cover 2, an adjustment component 8 for adjusting the size of the take-out opening 10 is provided on the front of the closed partition cover 2, a flow equalizing plate 5 is fixed inside the closed partition cover 2, a porous exhaust port 3 is provided on the side of the flow equalizing plate 5, and a porous exhaust port 3 is fixed on the back of the closed partition cover 2. The exhaust duct 6 connected to the exhaust port 3 is connected to an external exhaust fan, and the flow equalizing plate 5 is located at the rear of the closed partition 2. The flow equalizing plate 5 is parallel to the rear side wall of the closed partition 2 and the distance between the flow equalizing plate 5 and the rear side wall of the closed partition 2 is greater than 10 cm from the access port. The utility model arranges a closed partition 2 outside the weighing balance 4, rationally organizes the toxic and harmful airflow that escapes during weighing to flow to the porous exhaust port 3, and forms a negative pressure suction in the exhaust duct 6 through the exhaust fan, thereby removing the toxic and harmful airflow through the porous exhaust port 3. The utility model is suitable for ventilation protection of laboratories, pharmaceutical industries, chemical industries and other places, and can provide a clean and controllable working environment for weighing, batching and other operations. The size of the access port 10 can be adjusted by the setting of the adjustment component 8, so as to prevent the toxic and harmful gases inside the closed partition 2 from escaping to the greatest extent while facilitating weighing, reducing damage to weighing personnel and reducing surrounding air pollution. When not in use, the access port 10 is closed by adjusting the component 8, thereby greatly reducing dust and impurities in the external environment from falling onto the weighing balance 4, protecting the weighing balance 4, reducing the frequency of cleaning the weighing balance 4 and ensuring the weighing accuracy of the weighing balance 4.

[0025] Further as Figure 3 and Figure 4As shown, it is worth mentioning that the front solid side wall of the closed partition cover 2 is set as the positive side wall 9, and the adjustment component 8 includes a shifting plate 801 that slides in contact with the outer wall of the positive side wall 9, and two symmetrically distributed spring tongue plates 803 are provided on the side of the shifting plate 801. A round protrusion 805 is fixed on the side of the spring tongue plate 803 close to the positive side wall 9, and a card hole 802 that fits the round protrusion 805 is opened on the side of the positive side wall 9. There are multiple card holes 802 and the multiple card holes 802 are equidistantly distributed along the height direction of the closed partition cover 2; when working, by pulling the shifting plate 801, through the spring tongue plate 803, the round protrusion 805 The cooperation between the protrusion 805 and the card hole 802 allows the adjustment plate 801 to be pulled and adjusted to different positions, so that the size of the take-in and put-out port 10 can be adjusted through the adjustment plate 801, thereby facilitating weighing while preventing the escape of toxic and harmful gases inside the closed partition 2 to the greatest extent, reducing damage to the weighing personnel and reducing surrounding air pollution. When not in use, the take-in and put-out port 10 is closed by the adjustment plate 801, thereby greatly reducing dust and impurities in the external environment from falling onto the weighing balance 4, protecting the weighing balance 4, reducing the frequency of cleaning the weighing balance 4, and ensuring the weighing accuracy of the weighing balance 4.

[0026] Further as Figure 3 and Figure 4 As shown, it is worth mentioning that a T-shaped slot 804 is provided on the outer wall of the main side wall 9 and is arranged along the height direction of the closed partition cover 2, and a trapezoidal guide column 806 that is slidably adapted to the T-shaped slot 804 is fixed on the side of the adjustment plate 801 close to the main side wall 9; during specific operation, the adjustment plate 801 is limited by the cooperation of the set trapezoidal guide column 806 and the T-shaped slot 804 to prevent the adjustment plate 801 from slipping.

[0027] This solution has the following working process: by setting a closed shield 2 on the outside of the weighing balance 4, the toxic and harmful airflow that escapes during weighing is reasonably organized to flow to the porous exhaust port 3, and the toxic and harmful gas is sucked through the porous exhaust port 3 to prevent the harmful gas from being inhaled into the body by the weighing personnel or dissipating in an unorganized manner and polluting the entire room; by pulling the adjustment plate 801, the adjustment plate 801 can be pulled and adjusted to different positions through the cooperation of the tongue plate 803, the round protrusion 805 and the card hole 802, so that the size of the taking and releasing port 10 can be adjusted by the adjustment plate 801, so that while weighing is convenient, the toxic and harmful gas inside the closed shield 2 is prevented from escaping to the greatest extent, reducing the damage to the weighing personnel and reducing the surrounding air pollution. When not in use, the taking and releasing port 10 is closed by the adjustment plate 801, thereby greatly reducing the dust and impurities in the external environment from falling onto the weighing balance 4, and protecting the weighing balance 4.

[0028] Further as Figure 2As shown, it is worth mentioning that the sides of the flow equalizing plate 5 are arranged close to the inner wall of the partition, and a static pressure box 7 is arranged between the flow equalizing plate 5 and the rear wall of the closed partition 2; during specific operation, the static pressure box 7 is set to reduce the influence of the exhaust airflow on the weighing accuracy of the weighing balance 4.

[0029] Further as Figure 1 As shown, it is worth noting that the diameter of a single hole in the porous exhaust port 3 is about 5-10 mm, the total area of ​​the porous exhaust port 3 is not less than 1 / 4 of the area of ​​the flow equalizing plate 5, and the exhaust volume in the exhaust pipe 6 makes the average wind speed of the porous exhaust port 3 between 0.25-1 m / s.

[0030] In summary: toxic and harmful gases are sucked out through the porous exhaust vents 3 to prevent the harmful gases from being inhaled into the body by the weighing personnel or escaping in an unorganized manner to pollute the entire room. At the same time, the influence of the exhaust airflow on the weighing accuracy of the weighing balance 4 is reduced by the set flow equalizing plate 5, porous exhaust vents 3 and static pressure box 7. Compared with the existing protective cover, the capture efficiency of harmful substances is improved and the risk of occupational exposure of workers is reduced. The utility model is suitable for ventilation protection in laboratories, pharmaceutical industry, chemical industry and other places, and can provide a clean and controllable work environment for weighing, batching and other operations. The size of the access port 10 can be adjusted by the set adjustment component 8, so as to prevent the toxic and harmful gases inside the closed partition 2 from escaping to the greatest extent while facilitating weighing, reducing damage to weighing personnel and reducing surrounding air pollution. When not in use, the access port 10 is closed by adjusting the assembly 8, thereby greatly reducing dust and impurities in the external environment from falling onto the weighing balance 4, protecting the weighing balance 4, and reducing the frequency of cleaning the weighing balance 4.

[0031] The static pressure box 7 can be purchased on the market, which is a mature technology in this field and has been fully disclosed, so it will not be repeated in the specification.

Claims

1. A weighing platform exhaust hood, comprising a weighing platform (1), characterized in that: A closed partition (2) is fixed on the top side of the weighing platform (1), a weighing balance (4) located inside the closed partition (2) is placed on the top side of the weighing platform (1), a take-in and put-out opening (10) is provided on the front of the closed partition (2), an adjustment component (8) for adjusting the size of the take-in and put-out opening (10) is provided on the front of the closed partition (2), a flow equalizing plate (5) is fixed inside the closed partition (2), a multi-porous exhaust port (3) is provided on the side of the flow equalizing plate (5), an exhaust pipe (6) connected to the multi-porous exhaust port (3) is fixed on the back of the closed partition (2), and the exhaust pipe (6) is externally connected to an exhaust fan.

2. The weighing platform exhaust hood according to claim 1, characterized in that: The flow balancing plate (5) is located at the rear of the closed partition (2), the flow balancing plate (5) is parallel to the rear side wall of the closed partition (2), and the distance between the flow balancing plate (5) and the rear side wall of the closed partition (2) is greater than 10 cm.

3. The weighing platform exhaust hood according to claim 2, characterized in that: The sides of the flow balancing plate (5) are arranged close to the inner wall of the partition, and a static pressure box (7) is arranged between the flow balancing plate (5) and the rear wall of the closed partition (2).

4. The weighing platform exhaust hood according to claim 1, characterized in that: The area of ​​the porous air outlet (3) is larger than one quarter of the area of ​​the flow equalizing plate (5).

5. The weighing platform exhaust hood according to claim 1, characterized in that: The front solid side wall of the closed partition cover (2) is set as the front side wall (9), and the adjustment component (8) includes a shifting plate (801) that slides in contact with the outer wall of the front side wall (9), and two symmetrically distributed spring tongue plates (803) are provided on the side of the shifting plate (801). A round protrusion (805) is fixed on the side of the spring tongue plate (803) close to the front side wall (9), and a clamping hole (802) that is clamped with the round protrusion (805) is opened on the side of the front side wall (9), and the clamping hole (802) is provided with a plurality of the clamping holes (802), and the plurality of clamping holes (802) are evenly distributed along the height direction of the closed partition cover (2).

6. The weighing platform exhaust hood according to claim 5, characterized in that: A T-shaped slide groove (804) arranged along the height direction of the closed partition (2) is provided on the outer side wall of the front side wall (9), and a trapezoidal guide column (806) slidingly adapted to the T-shaped slide groove (804) is fixed on the side of the adjustment plate (801) close to the front side wall (9).

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