CN219034198U

CN219034198U - Negative pressure weighing chamber

Info

Publication number: CN219034198U
Application number: CN202223208727.8U
Authority: CN
Inventors: 赵琼; 胡卫杰; 刘国荣
Original assignee: Henan Xintai Pharmaceutical Co ltd
Current assignee: Henan Xintai Pharmaceutical Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-05-16
Anticipated expiration: 2032-11-30

Abstract

The utility model provides a negative pressure weighing chamber, which relates to the technical field of air purifying equipment, and comprises: weigh the room body, negative pressure weigh the inside of room body and seted up negative pressure weigh the storehouse, top passageway and rear portion passageway have been seted up respectively to negative pressure weigh the top and the rear side in storehouse, install high-efficient filter between the front end of top passageway and the top of negative pressure weigh the storehouse, install primary filter between the bottom of rear portion passageway and the negative pressure weigh the storehouse, the negative pressure fan that is used for negative pressure weigh the storehouse, primary filter and high-efficient filter between the air self-loopa is installed at the top of rear portion passageway, primary filter's inside has been seted up primary filter storehouse, primary filter storehouse's top fixed mounting has the filter screen, the scraping mechanism to its scraping brush is installed to the bottom of filter screen. The filter effect of the device can be improved, and the high-efficiency filter is prevented from being blocked by dust, so that the high-efficiency filter needs to be cleaned and maintained frequently.

Description

Negative pressure weighing chamber

Technical Field

The utility model relates to the technical field of air purification equipment, in particular to a negative pressure weighing chamber.

Background

The pharmaceutical industry has extremely strict requirements on sanitation and safety, and GMP specification requires that raw and auxiliary materials of the preparation be weighed in a special negative pressure weighing chamber capable of maintaining the negative pressure state of an operation area, and that the airflow type in the operation area of the negative pressure weighing chamber is vertical unidirectional flow, and the wind speed is controlled to be 0.45+/-20% m/s; when the negative pressure weighing chamber is used, firstly, gas in the weighing chamber is pumped out, and then part of the gas is discharged, so that negative pressure is generated in the weighing chamber, however, the discharged gas is filtered by a filter, the filter is easy to block after long-time use, the gas in the weighing chamber is difficult to discharge, and the stability of the negative pressure environment in the weighing chamber is affected.

The utility model discloses a negative pressure weighing chamber in the chinese patent of the bulletin number CN213742519U of authorizing, including weighing the room body, weigh the room body and including weighing operating chamber, rear portion passageway and top passageway, offered a mounting hole on the top passageway inner wall lower surface, the mounting hole communicates with weighing the operating chamber, equal fixedly connected with place the pole between the both sides inner wall at mounting hole both ends place a filter frame has been placed to the pole top fixedly connected with filter screen on the filter frame inner wall, the length of filter frame is greater than the distance between two placing the pole be equipped with on the mounting hole inner wall and be used for locking the locking mechanism on placing the pole with the filter frame.

However, the technical scheme has the following defects that the filtering effect of the weighing chamber is poor when the negative pressure weighing is performed in the scheme, so that dust exists in the weighing chamber during weighing, cross contamination among different medicines is caused, and the filter is easy to block after long-time use, so that the filter needs to be detached, cleaned and maintained frequently.

Disclosure of Invention

The utility model aims to provide a negative pressure weighing chamber, which aims to solve the problems that the filtering effect of a weighing chamber is poor when the negative pressure weighing chamber in the prior art is used for weighing, dust exists in the weighing chamber during weighing, cross contamination among different medicines is caused, and a filter is easy to block after long-time use, so that the filter is required to be detached, cleaned and maintained frequently.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the negative pressure weighing chamber comprises: weigh the room body, negative pressure weigh the inside of room body and seted up negative pressure weigh the storehouse, top passageway and rear portion passageway have been seted up respectively to negative pressure weigh the top and the rear side in storehouse, install high-efficient filter between the front end of top passageway and the top of negative pressure weigh the storehouse, install primary filter between the bottom of rear portion passageway and the negative pressure weigh the storehouse, the negative pressure fan that is used for negative pressure weigh the storehouse, primary filter and high-efficient filter between the air self-loopa is installed at the top of rear portion passageway, primary filter's inside has been seted up primary filter storehouse, primary filter storehouse's top fixed mounting has the filter screen, the scraping mechanism to its scraping brush is installed to the bottom of filter screen.

In order to prevent the filter screen from being blocked by large-particle dust, the utility model has the further technical scheme that an air inlet hole for communicating the primary filter bin with the negative pressure weighing bin is formed in the primary filter close to the negative pressure weighing bin, and the scraping mechanism comprises a scraping plate arranged on the bottom plate of the filter screen and a motor fixedly arranged on one side of the primary filter.

According to a further technical scheme, a transmission screw is rotatably arranged between two ends of the primary filter bin, one end of the transmission screw extends out of the primary filter and is fixedly connected with an output shaft of a motor, and a transmission sliding block in threaded connection with the outer wall of the transmission screw is fixedly arranged in the middle of the bottom end of the scraping plate.

According to a further technical scheme, limiting shafts symmetrically distributed at two ends of the scraping plate are fixedly arranged between two ends of the primary filter bin, and limiting sliding blocks which are in sliding connection with the outer wall of the limiting shafts are fixedly arranged at two ends of the bottom of the scraping plate.

According to a further technical scheme, one side of the weighing chamber body is hinged with a sealing door, the front end of the top channel is fixedly provided with a static pressure box communicated with the efficient filter, an air inlet and an air outlet of the negative pressure fan are respectively connected with the primary filter and the static pressure box, and the top of the primary filter bin is provided with a connecting groove communicated with the connecting pipe.

According to a further technical scheme, the front end of the static pressure box is fixedly provided with an exhaust pipe extending out of the weighing chamber body, and one end of the exhaust pipe extending out of the weighing chamber body is provided with a filter screen.

The beneficial effects of the utility model are as follows:

when the negative pressure is weighed, start negative pressure fan, negative pressure fan is with the inside air of negative pressure weigh the storehouse and is discharged into the static pressure case through the primary filter, then discharge into the negative pressure weigh the storehouse through high-efficient filter by the static pressure case, the inside filter screen of primary filter carries out primary filtration to the circulating air current simultaneously, large granule dust in the circulating air current filters, avoided large granule dust to cause the influence to negative pressure fan and high-efficient filter, strike off the mechanism simultaneously and scrape the brush to the filter screen, avoided the filter screen to be blocked by large granule dust, influence the flow of circulating air current, primary filter and high-efficient filter can improve the filter effect of device, the cross contamination between the different medicines that the weighing room exists the dust and arouses has been avoided, primary filter can protect high-efficient filter simultaneously, avoided high-efficient filter to be blocked by the dust, thereby constantly clear up and maintain it.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present utility model.

Fig. 2 is a schematic side view of an internal structure of an embodiment of the present utility model.

Fig. 3 is a schematic view of the internal structure of the primary filter of the present utility model.

In the figure: 1. a weighing chamber body; 2. a negative pressure weighing bin; 3. a top channel; 4. a rear channel; 5. a primary filter; 6. a negative pressure fan; 7. a static pressure box; 8. a high-efficiency filter; 9. a connecting pipe; 10. sealing the door; 11. an exhaust pipe; 12. a motor; 13. a primary filter bin; 14. a connecting groove; 15. a filter screen; 16. an air inlet hole; 17. a scraper; 18. a drive screw; 19. a limiting shaft; 20. a transmission slide block; 21. and a limit sliding block.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings.

As shown in fig. 1-3, a negative pressure weighing chamber comprising: weigh room body 1, weigh the inside of room body 1 and seted up negative pressure weigh storehouse 2, top passageway 3 and rear portion passageway 4 have been seted up respectively to the top and the rear side of negative pressure weigh storehouse 2, install high-efficient filter 8 between the front end of top passageway 3 and the top of negative pressure weigh storehouse 2, install primary filter 5 between the bottom of rear portion passageway 4 and the negative pressure weigh storehouse 2, negative pressure fan 6 that is used for the self-loopa of air between negative pressure weigh storehouse 2, primary filter 5 and the high-efficient filter 8 is installed at the top of rear portion passageway 4, primary filter 13 has been seted up to primary filter 5's inside, the top fixed mounting of primary filter 13 has filter screen 15, the scraping mechanism who scrapes it is installed to the bottom of filter screen 15.

In this particular embodiment, when negative pressure is weighed, start negative pressure fan 6, negative pressure fan 6 is with the inside air of negative pressure weigh bin 2 through just effective filter 5 row into static pressure case 7, then just effective filter 8 row into negative pressure weigh bin 2 by static pressure case 7, just effective filter is carried out just to circulating air flow to the inside filter screen 15 of effective filter 5 simultaneously, large granule dust filters in the circulating air flow, avoided large granule dust to cause the influence to negative pressure fan 6 and effective filter 8, scrape the mechanism simultaneously and scrape the brush to filter screen 15, avoided filter screen 15 to be blocked by large granule dust, influence circulating air flow's flow, the filter effect of device has been improved to effective filter 5 and effective filter 8, the cross contamination who weighs between the different medicines that the room exists the dust and arouses has been avoided, just effective filter 5 can protect effective filter 8 simultaneously, avoided effective filter 8 to be blocked by the dust, thereby the condition emergence that needs to clear up and maintain it often.

Specifically, the inside that the primary filter 5 is close to negative pressure weigh bin 2 has offered the inlet port 16 that is used for primary filter bin 13 and negative pressure weigh bin 2 to be linked together, and scraping mechanism is including installing scraper blade 17 at filter screen 15 bottom plate and fixed mounting at motor 12 of primary filter 5 one side.

Further, a driving screw 18 is rotatably installed between two ends of the primary filter bin 13, one end of the driving screw 18 extends out of the primary filter 5 and is fixedly connected with an output shaft of the motor 12, and a driving sliding block 20 in threaded connection with the outer wall of the driving screw 18 is fixedly installed in the middle of the bottom end of the scraping plate 17.

Further, the limiting shafts 19 symmetrically distributed at the two ends of the scraping plate 17 are fixedly installed between the two ends of the primary filter bin 13, limiting sliding blocks 21 which are in sliding connection with the outer wall of the limiting shafts 19 are fixedly installed at the two ends of the bottom of the scraping plate 17, and the motor 12 drives the scraping plate 17 to slide along the limiting shafts 19 through the driving screw 18, so that the scraping plate 17 can scrape dust attached to the filter screen 15, the filter screen 15 is prevented from being blocked by large-particle dust, and the flow of circulating airflow is prevented from being influenced.

Specifically, a sealing door 10 is hinged to one side of the weighing chamber body 1, a static pressure box 7 communicated with the efficient filter 8 is fixedly arranged at the front end of the top channel 3, a connecting pipe 9 is connected with the primary filter 5 and the static pressure box 7 respectively at the air inlet and the air outlet of the negative pressure fan 6, and a connecting groove 14 communicated with the connecting pipe 9 is formed in the top of the primary filter bin 13.

Further, an exhaust pipe 11 extending out of the weighing chamber body 1 is fixedly arranged at the front end of the static pressure box 7, and a filter screen is arranged at one end of the exhaust pipe 11 extending out of the weighing chamber body 1.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A negative pressure weighing cell comprising: weigh room body (1), negative pressure weigh storehouse (2) have been seted up to the inside of weighing room body (1), top passageway (3) and rear portion passageway (4) have been seted up respectively to the top and the rear side of negative pressure weigh storehouse (2), a serial communication port, install high-efficient filter (8) between the front end of top passageway (3) and the top of negative pressure weigh storehouse (2), install primary filter (5) between the bottom of rear portion passageway (4) and negative pressure weigh storehouse (2), negative pressure fan (6) that are used for air self-loopa between negative pressure weigh storehouse (2), primary filter (5) and high-efficient filter (8) are installed at the top of rear portion passageway (4), primary filter storehouse (13) have been seted up to the inside of primary filter (5), the top fixed mounting of primary filter storehouse (13) has filter screen (15), the scraping mechanism of scraping it is installed to the bottom of filter screen (15).

2. The negative pressure weighing chamber according to claim 1, characterized in that an air inlet hole (16) used for connecting the primary filter bin (13) with the negative pressure weighing bin (2) is formed in the primary filter (5) close to the negative pressure weighing bin (2), and the scraping mechanism comprises a scraping plate (17) arranged on the bottom plate of the filter screen (15) and a motor (12) fixedly arranged on one side of the primary filter (5).

3. The negative pressure weighing chamber according to claim 2, characterized in that a transmission screw (18) is rotatably arranged between two ends of the primary filter bin (13), one end of the transmission screw (18) extends out of the primary filter (5) and is fixedly connected with an output shaft of the motor (12), and a transmission sliding block (20) in threaded connection with the outer wall of the transmission screw (18) is fixedly arranged in the middle of the bottom end of the scraper (17).

4. The negative pressure weighing chamber according to claim 2, characterized in that limiting shafts (19) symmetrically distributed at two ends of the scraper (17) are fixedly arranged between two ends of the primary filter bin (13), and limiting sliding blocks (21) which are in sliding connection with the outer walls of the limiting shafts (19) are fixedly arranged at two ends of the bottom of the scraper (17).

5. Negative pressure weighing chamber according to any one of claims 1-4, characterized in that a sealing door (10) is hinged to one side of the weighing chamber body (1), a static pressure box (7) communicated with a high-efficiency filter (8) is fixedly arranged at the front end of the top channel (3), a connecting pipe (9) is connected between an air inlet and an air outlet of the negative pressure fan (6) and the primary filter (5) and the static pressure box (7) respectively, and a connecting groove (14) communicated with the connecting pipe (9) is formed in the top of the primary filter bin (13).

6. The negative pressure weighing chamber according to claim 5, characterized in that the front end of the static pressure box (7) is fixedly provided with an exhaust pipe (11) extending out of the weighing chamber body (1), and one end of the exhaust pipe (11) extending out of the weighing chamber body (1) is provided with a filter screen.