CN212057658U - Dust-free space backflow-preventing ventilation system - Google Patents

Abstract

The utility model discloses a dust-free space anti-backflow ventilation system, which comprises a box body and a ventilation cavity arranged in the box body, wherein the two ends of the box body are respectively communicated with an air inlet pipe and an air outlet pipe; a first louver blade and a second louver blade which are arranged in parallel are arranged in the transition cavity, the first louver blade is vertical to the air outlet direction of the air outlet pipe, and the rotation directions of the first louver blade and the second louver blade are opposite; a rotating shaft structure and a transmission structure arranged on the rotating shaft structure are arranged in the transition cavity; the pivot structure includes: the driving shaft controls the first louver blade to rotate and the driven shaft controls the second louver blade to rotate, and the rotation directions of the driving shaft and the driven shaft are opposite; an odd number of rotating shafts are arranged between the driving shaft and the driven shaft. The system can avoid sudden air pressure drop in the ventilation cavity caused by sudden closing of the ventilation pipe, so that the air outlet pipe cannot timely follow the closing to cause air flow recharging.

Description

Dust-free space backflow-preventing ventilation system

Technical Field

The utility model relates to a ventilation system field especially relates to a ventilation system is prevented flowing backward in dustless space.

Background

The air pressure of the closed workshop can rise in the process of blowing, drying and dedusting the interior of the medicine bottle in the medicine enterprise, and the ventilation pipe is opened to exhaust at the moment. When the process of blowing is finished, utilize automatically controlled to close air pipe, prevent that the insufficient gaseous convection that causes of atmospheric pressure from getting into the dust, but the sudden change of atmospheric pressure, the air-out pipe can not ensure accurate closing simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a ventilation system for preventing backflow in a dust-free space.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a dustless space backflow-preventing ventilation system comprises a box body and a ventilation cavity arranged in the box body, wherein an air inlet pipe and an air outlet pipe are respectively communicated with two ends of the box body; a first louver blade and a second louver blade which are arranged in parallel are installed in the transition cavity, the first louver blade is perpendicular to the air outlet direction of the air outlet pipe, and the turning directions of the first louver blade and the second louver blade are opposite; a rotating shaft structure and a transmission structure arranged on the rotating shaft structure are arranged in the transition cavity; the pivot structure includes: the louver blade driving device comprises a driving shaft and a driven shaft, wherein the driving shaft controls a first louver blade to rotate, the driven shaft controls a second louver blade to rotate, and the driving shaft and the driven shaft are opposite in rotation direction; an odd number of rotating shafts are arranged between the driving shaft and the driven shaft.

Preferably, be equipped with three pivot between the driving shaft with the driven shaft, three pivot is including rotating the connection the first transmission shaft of driving shaft and rotating the connection the second transmission shaft of driven shaft, still including setting up be in between first transmission shaft and the second transmission shaft and respectively with the jackshaft of first transmission shaft, second transmission shaft switching.

Preferably, the transmission structure comprises a plurality of first driving gears fixed on the driving shaft, and a first driven gear fixed on the first transmission shaft and meshed with the first driving gears; the first driving gear is installed in the middle section of the driving shaft.

Preferably, the transmission structure further comprises a plurality of second driving gears fixed on the first transmission shaft, and a second driven gear fixed on the intermediate shaft and meshed with the second driving gears; the second driving gears are installed at two ends of the first transmission shaft.

Preferably, the transmission structure comprises a third driving gear fixed on the intermediate shaft, and a third driven gear fixed on the second transmission shaft and meshed with the third driving gear; the third driving gear is located between the first driving gear and the second driving gear.

Preferably, the transmission structure comprises a fourth driving gear fixed on the second transmission shaft, and a fourth driven gear fixed on the driven shaft and meshed with the fourth driving gear; the fourth driving gear corresponds to the first driving gear in position.

The utility model has the advantages that: the utility model discloses in, firstly, set up the transition chamber and avoid a tuber pipe department atmospheric pressure sudden change, secondly use the complexity in two sides shutter plate control air-out return circuit to avoid the atmospheric pressure sudden drop, give closing of tuber pipe and hold the time of reserving. The system can avoid sudden air pressure drop in the ventilation cavity caused by sudden closing of the ventilation pipe, so that the air outlet pipe cannot timely follow the closing to cause air flow recharging.

Drawings

Fig. 1 is a schematic structural view of a ventilation system according to the present invention;

FIG. 2 is a schematic view of a transmission configuration;

FIG. 3 is a schematic view of the closed state of the louver blades;

FIG. 4 is a schematic view of the fully open position of the louvres.

Reference numbers in the figures: the box body 1, 11 ventilation cavities, 12 transition cavities, 13 through holes, 2 air inlet pipes, 21 one-way valves, 3 air outlet pipes, 31 stop valves, 4 first louvers, 5 second louvers, 6 rotating shaft structures, 61 driving shafts, 62 first transmission shafts, 63 intermediate shafts, 64 second transmission shafts, 65 driven shafts, 7 transmission structures, 71 first driving gears, 711 first driven gears, 72 second driving gears, 721 second driven gears, 73 third driving gears, 731 third driven gears, 74 fourth driving gears, 741 fourth driven gears and 8 function pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-4, 1, a dust-free space backflow prevention ventilation system comprises a box body 1 and a ventilation cavity 11 arranged in the box body 1, wherein two ends of the box body 1 are respectively communicated with an air inlet pipe 2 and an air outlet pipe 3, a transition cavity 12 communicated with the ventilation cavity 11 is further arranged in the box body 1, and the air outlet pipe 3 is communicated with the transition cavity 12; a first louver 4 and a second louver 5 which are arranged in parallel are installed in the transition cavity 12, the first louver 4 is perpendicular to the air outlet direction of the air outlet pipe 3, and the directions of rotation of the first louver 4 and the second louver 5 are opposite; a rotating shaft structure 6 and a transmission structure 7 arranged on the rotating shaft structure 6 are arranged in the transition cavity 12; the rotation shaft structure 6 includes: a driving shaft 61 for controlling the rotation of the first louver 4 and a driven shaft 65 for controlling the rotation of the second louver 5, wherein the rotation directions of the driving shaft 61 and the driven shaft 65 are opposite; an odd number of rotating shafts are arranged between the driving shaft 61 and the driven shaft 65.

The working principle is as follows: the air pressure of the closed workshop can rise in the process of blowing, drying and dedusting the interior of the medicine bottle in the medicine enterprise, and the ventilation pipe is opened to exhaust at the moment. When the blowing process is finished, the ventilating duct is closed by utilizing electric control, so that the air convection caused by insufficient air pressure can be prevented from entering dust. In order to make the process smoothly carried out, the transition cavity 12 is provided, and two louvers are arranged to increase the difficulty of the ventilation loop, so that the ventilation loop is used for delaying ventilation, the compensation effect on the instant air pressure loss is achieved, and the air pressure cannot be suddenly lost to cause air recharging.

During ventilation, the opening conditions of the two louver blades are as shown in fig. 4, ventilation is completely conducted at the moment, ventilation is not affected, the positions of the louver blades are adjusted slowly before the ventilation pipe 2 is closed, the ventilation pipe changes from fig. 4 to fig. 3, the tortuosity of an air outlet loop can be increased due to different turning directions, the air speed and the air flux per unit time are reduced under the ventilation condition, along with the process, the air pressure is not suddenly reduced due to the closing of the ventilation pipe 2, the air pressure is slowly reduced, the air pipe 3 is closed to vacate time, and due to the arrangement, a small part of air which is refilled by the air outlet pipe 3 is reserved in the transition cavity 12. In actual use, the ventilation pipe 2 is preferably closed after the louver blades are closed by half, so that the backflow preventing effect is better.

In order to the realization of above-mentioned device, this device adopts the gear to carry out the transmission, for the stability that gear drive cooperation shutter plate used, the utility model discloses continue to make following improvement.

The three rotating shafts are arranged between the driving shaft 61 and the driven shaft 65 and comprise a first transmission shaft 62 rotatably connected with the driving shaft 61, a second transmission shaft 64 rotatably connected with the driven shaft 65 and an intermediate shaft 63 arranged between the first transmission shaft 62 and the second transmission shaft 64 and respectively connected with the first transmission shaft 62 and the second transmission shaft 64 in a rotating mode. The use structural style of shutter plate all is the same with the shutter, so receive the line just at the both ends of driving shaft 61, consequently with first driving gear 71 setting in the middle section, interference prevention, it is more stable. With such an arrangement, corresponding position definitions are made for the underlying gear sets.

The transmission mechanism 7 includes a plurality of first driving gears 71 fixed to the driving shaft 61, and a first driven gear 711 fixed to the first transmission shaft 62 and engaged with the first driving gears 71. The first driving gear 71 is mounted on the middle section of the driving shaft 61. This provides two stable ends.

The transmission structure 7 further includes a plurality of second driving gears 72 fixed to the first transmission shaft 62, and a second driven gear 721 fixed to the intermediate shaft 63 and engaged with the second driving gears 72. The second driving gears 72 are installed at both ends of the first transmission shaft 62.

The transmission mechanism 7 includes a third driving gear 73 fixed to the intermediate shaft 63, and a third driven gear 731 fixed to the second transmission shaft 64 and engaged with the third driving gear 73. The third driving gear 73 is located between the first driving gear 71 and the second driving gear 72.

The transmission mechanism 7 includes a fourth driving gear 74 fixed to the second transmission shaft 64, and a fourth driven gear 741 fixed to the driven shaft 65 and engaged with the fourth driving gear 74. The fourth driving gear 74 corresponds to the first driving gear 71. The whole gear set forms a stable whole, and the effect can be stably exerted under the condition that one driving gear drives.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. A dustless space backflow-preventing ventilation system comprises a box body (1) and a ventilation cavity (11) arranged in the box body (1), wherein an air inlet pipe (2) and an air outlet pipe (3) are respectively communicated with two ends of the box body (1), and is characterized in that a transition cavity (12) communicated with the ventilation cavity (11) is further arranged in the box body (1), and the air outlet pipe (3) is communicated with the transition cavity (12); a first louver blade (4) and a second louver blade (5) which are arranged in parallel are installed in the transition cavity (12), the first louver blade (4) is perpendicular to the air outlet direction of the air outlet pipe (3), and the turning directions of the first louver blade (4) and the second louver blade (5) are opposite; a rotating shaft structure (6) and a transmission structure (7) arranged on the rotating shaft structure (6) are arranged in the transition cavity (12);

the spindle structure (6) includes: a driving shaft (61) for controlling the rotation of the first louver blade (4) and a driven shaft (65) for controlling the rotation of the second louver blade (5), wherein the rotation directions of the driving shaft (61) and the driven shaft (65) are opposite; an odd number of rotating shafts are arranged between the driving shaft (61) and the driven shaft (65).

2. A ventilation system for preventing backflow in dustless space as defined in claim 1, wherein three rotation shafts are provided between said driving shaft (61) and said driven shaft (65), said three rotation shafts including a first transmission shaft (62) rotatably connected to said driving shaft (61) and a second transmission shaft (64) rotatably connected to said driven shaft (65), and further including an intermediate shaft (63) disposed between said first transmission shaft (62) and said second transmission shaft (64) and adapted to said first transmission shaft (62) and said second transmission shaft (64), respectively.

3. A dust-free space backflow preventing ventilation system as claimed in claim 2, wherein the transmission structure (7) comprises a plurality of first driving gears (71) fixed on the driving shaft (61), and a first driven gear (711) fixed on the first transmission shaft (62) and engaged with the first driving gears (71); the first driving gear (71) is arranged in the middle of the driving shaft (61).

4. A dust-free space backflow preventing ventilation system as claimed in claim 2, wherein the transmission structure (7) further comprises a plurality of second driving gears (72) fixed on the first transmission shaft (62), a second driven gear (721) fixed on the intermediate shaft (63) and engaged with the second driving gears (72); the second driving gears (72) are installed at two ends of the first transmission shaft (62).

5. A dust-free space backflow preventing ventilation system as claimed in claim 2, wherein the transmission structure (7) comprises a third driving gear (73) fixed on the intermediate shaft (63), a third driven gear (731) fixed on the second transmission shaft (64) and engaged with the third driving gear (73); the third driving gear (73) is located between the first driving gear (71) and the second driving gear (72).

6. A dust space backflow prevention ventilation system as claimed in claim 3, wherein the transmission structure (7) comprises a fourth driving gear (74) fixed on the second transmission shaft (64), and a fourth driven gear (741) fixed on the driven shaft (65) and engaged with the fourth driving gear (74); the fourth driving gear (74) corresponds in position to the first driving gear (71).

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