CN217994763U

CN217994763U - Pneumatic type ventilation baffle

Info

Publication number: CN217994763U
Application number: CN202222583117.XU
Authority: CN
Inventors: 钱文华; 徐雷; 谭晓璐; 姚杰; 陈凯恩; 胡慕荣; 支英超
Original assignee: Changshu Haixin Ship Machinery Manufacture Co ltd
Current assignee: Changshu Haixin Ship Machinery Manufacture Co ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2022-12-09
Anticipated expiration: 2032-09-28

Abstract

A pneumatic ventilation baffle belongs to the technical field of ventilation equipment. Including the window frame, still include: the baffle mechanism comprises a plurality of baffle bodies which are arranged in the inner cavity of the window frame at intervals and realize linkage, and the baffle bodies are connected between the side panels at the two sides of the window frame; the wiring limiting mechanism is arranged on one side panel of the window frame and can limit the rotating positions of the baffle bodies; the rotary cylinder mechanism comprises a double-acting rotary cylinder and a cylinder rotating shaft, and the cylinder rotating shaft inwards extends into the inner cavity of the window frame and is connected with the baffle body positioned at the top; the control assembly comprises a control box body, a two-position three-way electromagnetic valve and a two-position five-way pneumatic control valve which are arranged in the control box body, and a pipeline exhaust valve; the air source mechanism comprises an air compression tank, and an air outlet pipe is connected to an air outlet of the air compression tank. The advantages are that: the structure is compact, the operation is stable, the rapid opening and closing can be realized in a short time, and the working efficiency and the assembly efficiency are improved; the use safety is ensured.

Description

Pneumatic type ventilation baffle

Technical Field

The utility model belongs to the technical field of ventilation equipment, concretely relates to pneumatic type ventilation baffle.

Background

Above-mentioned ventilation baffle is applicable to spaces such as various superstores, venue, basement, boats and ships usually, and it is arranged in the inboard of ventilation pipe or between two pipelines with rotatable mode and structure, and the ventilation baffle body can be connected and realize opening the inside switching of closed completion ventilation pipe through the rotation of self with the pipe wall through the pivot mostly. The ventilation baffle plate for the ship is one of important accessories for limiting air flow circulation inside the ventilation pipe inside the ship, and has the functions of ventilating the ship, forming air convection and changing the air environment inside the ship. However, the existing ventilation baffle for the ship has the defects of the general ventilation baffle: the internal pneumatic structure is very complex, and when the pneumatic valve is installed, the single valve bodies need to be installed and connected one by one, so that the speed is low and the assembly efficiency is low; in addition, due to the characteristic of complex structure of the baffle mechanism, the existing baffle mechanism cannot effectively ensure the quick and stable opening or closing of the ventilation baffle when being turned over, so that the working effect is influenced.

In view of the above-mentioned prior art, there is a need for a reasonable improvement in the structure of existing pneumatic ventilation flaps. The applicant has made an advantageous design for this purpose, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compact structure, operation are reliable, help realizing that the automation of baffle is opened the closure fast and is satisfied different scene user demands from this and promote the security, thereby be favorable to adopting the control assembly of integrated form to show the pneumatic type ventilation baffle that promotes assembly efficiency.

The utility model discloses a task is accomplished like this, a pneumatic type ventilation baffle, personally submit the window frame of open type structure including both ends around one, the inside cavity of this window frame is formed with a window frame inner chamber, still includes: the baffle mechanism comprises a plurality of baffle bodies which are arranged in the inner cavity of the window frame at equal intervals along the height direction of the window frame and realize linkage, and the baffle bodies are connected between the side panels at two sides of the window frame; the wiring limiting mechanism is arranged on one side panel of the window frame and can limit the rotating positions of the baffle bodies; the rotary cylinder mechanism comprises a double-acting rotary cylinder fixedly arranged on the other side panel of the window frame and a cylinder rotating shaft connected to the double-acting rotary cylinder, and the cylinder rotating shaft inwards extends into the inner cavity of the window frame and is connected with the baffle body positioned at the top; the control assembly comprises a control box body arranged at the lower part of the double-acting rotary cylinder, a two-position three-way electromagnetic valve and a two-position five-way pneumatic control valve which are arranged in the control box body and can be communicated with each other, the two-position five-way pneumatic control valve is communicated with the double-acting rotary cylinder through double pipelines, and the control assembly also comprises a pipeline exhaust valve which is respectively communicated with an air inlet of the two-position three-way electromagnetic valve and an air inlet of the two-position five-way pneumatic control valve through a three-way pipeline; and the air source mechanism comprises an air compression tank fixedly arranged at the lower position of the bottom panel of the window frame, and an air outlet pipe communicated with the pipeline exhaust valve is connected at an air outlet of the air compression tank.

In a specific embodiment of the present invention, a front flange bracket and a rear flange bracket are respectively connected to the front and rear end faces of the window frame at the peripheral edge.

In another embodiment of the present invention, a handle fixing member is fixedly installed on an outer side surface of one side panel of the window frame, and a maintenance handle is provided on the handle fixing member.

In another specific embodiment of the present invention, the end portions of the two ends of the plurality of baffle bodies of the baffle mechanism in the length direction are connected to a plurality of baffle shafts, and the plurality of baffle shafts are respectively pivotally connected to the side panels on the two sides of the window frame, so as to realize the rotational connection between the plurality of baffle bodies and the window frame.

The utility model discloses a further concrete embodiment is, it is a plurality of all be connected with a baffle axle fixed plate on the axis body of the baffle axle of one side of baffle body, this baffle axle fixed plate length direction's one end connection is on the axis body of baffle axle, and baffle mechanism is still including a gangbar, and is a plurality of baffle axle fixed plate length direction's the one end tip of keeping away from the baffle axle all connects on the body of rod of this gangbar, thereby this gangbar realizes the linkage of a plurality of baffle bodies through being connected with a plurality of baffle axle fixed plates.

In yet another specific embodiment of the present invention, the wiring limiting mechanism has a terminal box and a pair of limiting switches, the terminal box is fixedly mounted on a side panel of the window frame opposite to the control assembly through a terminal box bracket, and the pair of limiting switches are also fixedly mounted on the side panel of the window frame and positioned above the terminal box, and the terminal box and the pair of limiting switches are electrically connected; and the baffle body length direction that is located the top is kept away from the outside side board that stretches out the window frame of one end tip of the baffle axle of control assembly, and still is connected with a rotatory backstop board on this end of this baffle axle, two limit switch sets up the left and right sides position department in this rotatory backstop board below respectively, and two limit switch all have one set up the limit adjusting lever in its upper portion, and the limit adjusting lever of both sides can be right thereby the rotation of rotatory backstop board carries out the backstop and realizes spacing to a plurality of baffle body pivoted.

In yet another specific embodiment of the present invention, a cylinder handle capable of controlling the operation of the double-acting rotary cylinder is further provided on the double-acting rotary cylinder.

In a more specific embodiment of the present invention, the rotary cylinder mechanism further includes a cylinder fixing frame fixedly connected to the side panel of the window frame, the double-acting rotary cylinder is connected to the cylinder fixing frame through itself to fix the window frame, and the cylinder rotating shaft passes through the cylinder fixing frame and extends into the inner cavity of the window frame.

The utility model discloses a still further a concrete embodiment the bottom of two effect revolving cylinder constitutes there are a cylinder first inlet port I and a cylinder second inlet port II, and the top of two five-way air control valves is constituted respectively has the first port I and the second port II of giving vent to anger of a pneumatic control valve, the first inlet port I of giving vent to anger of cylinder and the first port I of giving vent to anger of pneumatic control valve pass through the pipeline intercommunication, and cylinder second inlet port II then gives vent to anger the port II with the pneumatic control valve second and passes through the pipeline intercommunication, just the first port I of giving vent to anger of pneumatic control valve can realize with two three-way solenoid valve intercommunication, the second port II of giving vent to anger of pneumatic control valve then can realize with the intercommunication of the inlet port of two five-way air control valves.

In a more specific embodiment of the present invention, the air source mechanism further includes an air compression tank fixing frame fixedly connected to the lower portion of the bottom panel of the window frame, and the air compression tank is fixed to the window frame by connecting itself to the air compression tank fixing frame; and the air inlet of the air compression tank is also connected with an air injection pipeline, and the air injection pipeline is also provided with a check valve.

The technical scheme provided by the utility model the technical effect lie in: firstly, by arranging the rotary cylinder mechanism, and the two-position three-way electromagnetic valve and the two-position five-way pneumatic control valve which can be communicated with the rotary cylinder mechanism, forward and reverse rotation of a cylinder rotating shaft can be quickly and stably realized, and a plurality of baffle bodies are driven to be opened or closed, so that the whole structure is compact, the operation is stable, quick opening and closing can be realized in a short time, and the working efficiency is obviously improved; secondly, by adopting an integrated control assembly and installing a control box body capable of reliably bearing the two-position three-way electromagnetic valve and the two-position five-way air control valve at the lower part of the double-acting rotary cylinder, pneumatic control assembly can be completed only by butting the double-acting rotary cylinder and the two-position five-way air control valve, and the assembly efficiency is greatly improved; and thirdly, by arranging the pipeline exhaust valve on the air outlet pipe, when the integral structure needs to be overhauled, the pipeline exhaust valve can exhaust compressed air in the double-acting rotary cylinder, so that the overhaul is convenient and the safety is improved.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a right side view of the embodiment shown in fig. 1.

Fig. 3 is a left side view of the embodiment shown in fig. 1.

Fig. 4 is a schematic structural diagram of the shutter mechanism in the embodiment shown in fig. 1.

In the figure: 1. the window comprises a window frame, 11 parts of a window frame inner cavity, 12 parts of a front flange bracket, 13 parts of a rear flange bracket, 14 parts of a handle fixing piece and 141 parts of a maintenance handle; 2. the device comprises a baffle mechanism 21, a baffle body 211, a baffle shaft 212, a baffle shaft fixing plate 213, a rotary stop plate 22 and a linkage rod; 3. the wiring limiting mechanism 31, the junction box 311, the junction box bracket 32, the limiting switch 321 and the limiting adjusting rod; 4. the device comprises a rotary cylinder mechanism, 41, a double-acting rotary cylinder, 411, a cylinder handle, 412, a first air inlet port I of the cylinder, 413, a second air inlet port II of the cylinder, 42, a rotary shaft of the cylinder, 43 and a cylinder fixing frame; 5. the control assembly 51 comprises a control box body 52, a two-position three-way electromagnetic valve 53, a two-position five-way pneumatic control valve 531, a first air outlet port I of the pneumatic control valve 532, a second air outlet port II of the pneumatic control valve 54 and a pipeline exhaust valve; 6. the air source mechanism 61, the air compression tank 611, the air injection pipeline 612, the check valve 62, the air outlet pipe 63 and the air compression tank fixing frame.

Detailed Description

In order to clearly understand the technical essence and the beneficial effects of the present invention, the following detailed description is made by way of examples, but the description of the examples is not a limitation to the solution of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and insubstantial, should be considered as the technical scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position state of fig. 1, and thus, should not be interpreted as a specific limitation to the technical solution provided by the present invention.

Referring to fig. 1 to 4, the present invention relates to a pneumatic ventilation baffle, which comprises a window frame 1 having an open front and rear ends, wherein a window frame cavity 11 is formed in the window frame 1. As the technical scheme provided by the utility model main points, pneumatic type ventilation baffle still includes: a baffle mechanism 2, the baffle mechanism 2 comprises a plurality of baffle bodies 21 which are arranged in the inner cavity 11 of the window frame 1 at equal intervals along the height direction of the window frame and realize linkage, five baffle bodies are shown in fig. 4, of course, the number of the baffle bodies 21 is not limited by the baffle bodies, and the baffle bodies 21 are connected between the side panels at two sides of the window frame 1; a wiring limiting mechanism 3 which is installed on one side panel of the window frame 1 and can limit the rotation positions of the baffle bodies 21; a rotary cylinder mechanism 4, comprising a double-acting rotary cylinder 41 fixedly installed on the other side panel of the window frame 1 and a cylinder rotating shaft 42 connected to the double-acting rotary cylinder 41, wherein the cylinder rotating shaft 42 extends inwards into the window frame inner cavity 11 and is rotatably connected with the baffle body 21 positioned at the top, and the double-acting rotary cylinder 41 can realize the positive and negative rotation of the cylinder rotating shaft 42 so as to control the opening and closing of the plurality of baffle bodies 21; a control assembly 5, and the control assembly 5 includes a control box body 51 installed at the lower part of the aforesaid double-acting rotary cylinder 41, a two-position three-way electromagnetic valve 52 and a two-position five-way air control valve 53 which are arranged inside the control box body 51 and are communicated with each other, the two-position five-way air control valve 53 and the aforesaid double-acting rotary cylinder 41 realize the double-pipeline communication, the control assembly 5 also includes a pipeline exhaust valve 54, the pipeline exhaust valve 54 is communicated with the air inlet of the two-position three-way electromagnetic valve 52 and the air inlet of the two-position five-way air control valve 53 through three-way pipelines respectively; the air source mechanism 6 comprises an air compression tank 61 fixedly arranged at the lower position of the bottom panel of the window frame 1, and an air outlet 62 communicated with the pipeline exhaust valve 54 is connected at the air outlet of the air compression tank 61.

Further, a front flange bracket 12 and a rear flange bracket 13 are respectively connected to the four peripheral edges of the front and rear end faces of the window frame 1; the window frame 1 body can be connected with a ventilation duct through the front flange bracket 12 and the rear flange bracket 13.

Further, a handle fixing member 14 is fixedly installed on an outer side surface of one side panel of the window frame 1, and a maintenance handle 141 is provided on the handle fixing member 14; the maintenance handle 141 is provided to facilitate the maintenance of the internal structure by a user.

With reference to fig. 1, 2 and 3, the ends of the two ends of the plurality of shutter bodies 21 of the shutter mechanism 2 in the length direction are connected to a shutter shaft 211, and the plurality of shutter shafts 211 are pivotally connected to the side panels on the two sides of the window frame 1, respectively, so as to realize the rotational connection between the plurality of shutter bodies 21 and the window frame 1.

In this embodiment, a plurality of baffle shaft fixing plates 212 are connected to the shaft body of the baffle shaft 211 on one side of the baffle bodies 21, one end of each baffle shaft fixing plate 212 in the length direction is connected to the shaft body of the baffle shaft 211, the baffle mechanism 2 further comprises a linkage rod 22, one end of each baffle shaft fixing plate 212 in the length direction, which is far away from the baffle shaft 211, is connected to the rod body of the linkage rod 22, and the linkage rod 22 is connected to the baffle shaft fixing plates 212 to realize linkage of the baffle bodies 21.

Furthermore, the wiring limit mechanism 3 has a terminal box 31 and a pair of limit switches 32, the terminal box 31 is fixedly mounted on a side panel of the window frame 1 opposite to the control assembly 5 through a terminal box bracket 311, the pair of limit switches 32 are also fixedly mounted on a side panel of the window frame 1 and positioned above the terminal box 31, and the terminal box 31 and the pair of limit switches 32 are electrically connected; the end of the top baffle body 21, which is far away from the baffle shaft 211 of the control assembly 5 in the length direction, protrudes outward beyond the side panel of the window frame 1, and the end of the baffle shaft 211 is further connected with a rotation stop plate 213, the two limit switches 32 are respectively disposed at the left and right side positions below the rotation stop plate 213, and each of the two limit switches 32 has a limit adjusting rod 321 disposed at the upper portion thereof, and the limit adjusting rods 321 at both sides can stop the rotation of the rotation stop plate 213, thereby realizing the rotation limit of the plurality of baffle bodies 21.

Please refer to fig. 1 and fig. 2, a cylinder handle 411 capable of controlling the operation of the double-acting rotary cylinder 41 is further disposed on the double-acting rotary cylinder 41; when the whole mechanism is in an airless state, a worker can rotate the cylinder rotating shaft 42 through the cylinder handle 411, thereby completing the opening or closing operation of the plurality of baffle bodies 21.

Furthermore, the rotating cylinder mechanism 4 further comprises a cylinder fixing frame 43 fixedly connected to the side panel of the window frame 1, the double-acting rotating cylinder 41 is fixed to the window frame 1 by connecting itself to the cylinder fixing frame 43, and the cylinder rotating shaft 42 penetrates through the cylinder fixing frame 43 and protrudes into the window frame inner cavity 11.

In the embodiment, a first cylinder air inlet port i 412 and a second cylinder air inlet port ii 413 are formed at the bottom of the double-acting rotary cylinder 41, and a first pneumatic valve air outlet port i 531 and a second pneumatic valve air outlet port ii 532 are respectively formed at the top of the two-position five-way pneumatic valve 53, the first cylinder air inlet port i 412 is communicated with the first pneumatic valve air outlet port i 531 through a pipeline, the second cylinder air inlet port ii 413 is communicated with the second pneumatic valve air outlet port ii 532 through a pipeline, the first pneumatic valve air outlet port i 531 can be communicated with the two-position three-way electromagnetic valve 52, and the second pneumatic valve air outlet port ii 532 can be communicated with the air inlet port of the two-position five-way valve 53; it should be noted that the internal structures and the working communication principles of the double-acting rotary cylinder 41, the two-position three-way electronic control valve 52, and the two-position five-way pneumatic control valve 53 all belong to the prior art, and are not described in detail by the applicant herein.

In this embodiment, the air source mechanism 6 further includes an air compression tank fixing frame 63 fixedly connected to the lower portion of the bottom panel of the window frame 1, and the air compression tank 61 is fixed to the window frame 1 by connecting itself to the air compression tank fixing frame 63; an air injection pipe 611 is connected to the air inlet of the air compression tank 61, and a check valve 612 is disposed on the air injection pipe 611.

With continuing reference to fig. 1 to fig. 4, the applicant briefly describes the working principle of the technical solution provided by the present invention: firstly, when ventilation is needed, namely the ventilation pipeline is in a ventilation state, the baffle bodies 2 need to be in a horizontal state, at this time, the two-position three-way electromagnetic valve 52 of the control assembly 5 is electrified by an instruction of an external electric control box (not shown in the figures), at this time, the two-position three-way electromagnetic valve 52 is electrified, the two-position three-way electromagnetic valve 52 is communicated with the two-position five-way air control valve 53, the air outlet of the two-position three-way electromagnetic valve 52 is communicated with the first air outlet port I531 of the air control valve 53, at this time, compressed air in the air compression tank 61 of the air source mechanism 6 is sent into the pipeline exhaust valve 54 through the air outlet pipe 62, meanwhile, the air inlet of the two-position three-way electromagnetic valve 52 is opened, the compressed air enters the two-position three-way electromagnetic valve 52 through the three-way pipeline, then the compressed air enters the first air inlet port I412 of the air cylinder through the first air outlet port I531 of the air control valve to drive the air cylinder rotating shaft 42 to rotate, and the cylinder rotating shaft 42 drives the baffle body 21 at the top to turn over and realize linkage of the baffle body 21 at the bottom, thereby realizing the opening of the baffle bodies 2; when the closing state of the ventilation duct needs to be realized, the baffle bodies 2 need to be turned over from the horizontal state to realize closing, at the moment, the two-position three-way electromagnetic valve 52 is powered off under the control of an external electric cabinet (not shown in the figure), the two-position three-way electromagnetic valve 52 is disconnected from the two-position five-way pneumatic control valve 53 and communicated with the air inlet port of the two-position five-way pneumatic control valve 53, compressed air of the air compression tank 61 is sent into the pipeline exhaust valve 54 through the air outlet pipe 62, the compressed air enters the two-position five-way pneumatic control valve 53 through the three-way pipeline, then the compressed air enters the second air outlet port II 532 of the pneumatic control valve through the second air inlet port II 413 of the air cylinder to drive the air cylinder rotating shaft 42 to rotate reversely, the air cylinder rotating shaft 42 drives the uppermost baffle body 21 to turn over and realize linkage of the baffle bodies 21 below, and the baffle bodies 2 are turned over reversely to realize closing. The normal working pressure of the double-acting rotary cylinder 41 is 0.4-0.8 MPa, the working pressure of the air compression tank 61 is 0.8MPa, and the compressed air in the air compression tank 61 can meet the requirement that the baffle body 21 is opened and closed twice; the pneumatic ventilation baffle can be opened when electrified and closed when power-off ventilation is achieved, and can be opened or closed within 3 seconds after ventilation, and the pneumatic ventilation baffle is fast in response, safe and reliable.

To sum up, the technical solution provided by the present invention remedies the defects in the prior art, successfully completes the invention task, and faithfully embodies the technical effects mentioned in the above technical effect column by the applicant.

Claims

1. The utility model provides a pneumatic type ventilation baffle, includes window frame (1) that both ends were the open type structure in front and back, and this window frame (1) inside cavity is formed with a window frame inner chamber (11), its characterized in that still includes: the baffle mechanism (2) comprises a plurality of baffle bodies (21) which are arranged in the inner cavity (11) of the window frame at equal intervals along the height direction of the window frame (1) and realize linkage, and the baffle bodies (21) are connected between the side panels at two sides of the window frame (1); the wiring limiting mechanism (3) is arranged on one side panel of the window frame (1) and can limit the rotating positions of the baffle bodies (21); the rotary cylinder mechanism (4) comprises a double-acting rotary cylinder (41) fixedly arranged on the other side panel of the window frame (1) and a cylinder rotating shaft (42) connected to the double-acting rotary cylinder (41), and the cylinder rotating shaft (42) inwards extends into the inner cavity (11) of the window frame and is connected with the baffle body (21) positioned at the top; the control assembly (5) comprises a control box body (51) arranged at the lower part of the double-acting rotary cylinder (41), a two-position three-way electromagnetic valve (52) and a two-position five-way pneumatic control valve (53) which are arranged in the control box body (51) and can be communicated with each other, the two-position five-way pneumatic control valve (53) is communicated with the double-acting rotary cylinder (41) through a double pipeline, the control assembly (5) further comprises a pipeline exhaust valve (54), and the pipeline exhaust valve (54) is respectively communicated with an air inlet of the two-position three-way electromagnetic valve (52) and an air inlet of the two-position five-way pneumatic control valve (53) through a three-way pipeline; and the air source mechanism (6) comprises an air compression tank (61) fixedly arranged at the lower position of the bottom panel of the window frame (1), and an air outlet pipe (62) communicated with the pipeline exhaust valve (54) is connected at an air outlet of the air compression tank (61).

2. A pneumatic ventilation flap as claimed in claim 1, characterized in that a front flange bracket (12) and a rear flange bracket (13) are respectively attached to the peripheral edges of the front and rear end faces of the window frame (1).

3. A pneumatic ventilation flap as claimed in claim 1, characterized in that a handle holder (14) is fixedly mounted on the outer side surface of one side panel of the window frame (1), a maintenance handle (141) being provided on the handle holder (14).

4. The pneumatic ventilation flap of claim 1, characterized in that a flap shaft (211) is connected to both ends of the flap bodies (21) of the flap mechanism (2) in the length direction, and the flap shafts (211) are pivotally connected to the side panels on both sides of the window frame (1), so as to achieve the pivotal connection between the flap bodies (21) and the window frame (1).

5. The pneumatic ventilation baffle as claimed in claim 4, wherein a baffle shaft fixing plate (212) is connected to the shaft body of the baffle shaft (211) on one side of the plurality of baffle bodies (21), one end of the baffle shaft fixing plate (212) in the length direction is connected to the shaft body of the baffle shaft (211), the baffle mechanism (2) further comprises a linkage rod (22), one end of the baffle shaft fixing plate (212) in the length direction, which is far away from the baffle shaft (211), is connected to the rod body of the linkage rod (22), and the linkage rod (22) is connected with the plurality of baffle shaft fixing plates (212) to realize linkage of the plurality of baffle bodies (21).

6. A pneumatic ventilation flap according to claim 4, characterized in that the wiring limit mechanism (3) has a junction box (31) and a pair of limit switches (32), the junction box (31) is fixedly mounted on one side panel of the window frame (1) opposite to the control assembly (5) through a junction box bracket (311), the pair of limit switches (32) is also fixedly mounted on one side panel of the window frame (1) and positioned at a position above the junction box (31), and the junction box (31) and the pair of limit switches (32) are electrically connected; and the baffle body (21) length direction that is located the top is kept away from the side board of window frame (1) is outwards stretched out to the one end tip of baffle axle (211) of control assembly (5), and still is connected with a rotatory backstop board (213) on this one end of this baffle axle (211), two limit switch (32) set up the left and right sides position department in this rotatory backstop board (213) below respectively, and two limit switch (32) all possess one set up limit adjusting lever (321) of portion above that, and limit adjusting lever (321) of both sides can be right thereby the rotation of rotatory backstop board (213) carries out the backstop and realizes spacing to a plurality of baffle bodies (21) pivoted.

7. A pneumatic ventilation flap according to claim 1, characterized in that a cylinder handle (411) is provided on the double acting rotary cylinder (41) to control the operation of the double acting rotary cylinder (41).

8. A pneumatic ventilation flap according to claim 1, characterized in that the rotary cylinder mechanism (4) further comprises a cylinder holder (43) fixedly connected to the side panel of the window frame (1), the double-acting rotary cylinder (41) is fixed to the window frame (1) by its own connection to the cylinder holder (43), and the cylinder rotation shaft (42) passes through the cylinder holder (43) and protrudes into the window frame cavity (11).

9. The pneumatic ventilation baffle plate as claimed in claim 8, wherein a first cylinder air inlet port I (412) and a second cylinder air inlet port II (413) are formed at the bottom of the double-acting rotary cylinder (41), a first pneumatic valve air outlet port I (531) and a second pneumatic valve air outlet port II (532) are formed at the top of the two-position five-way pneumatic valve (53), the first cylinder air inlet port I (412) is communicated with the first pneumatic valve air outlet port I (531) through a pipeline, the second cylinder air inlet port II (413) is communicated with the second pneumatic valve air outlet port II (532) through a pipeline, the first pneumatic valve air outlet port I (531) can be communicated with the two-position three-way electromagnetic valve (52), and the second pneumatic valve air outlet port II (532) can be communicated with the air inlet port of the five-way pneumatic valve (53).

10. The pneumatic ventilation baffle plate as claimed in claim 1, wherein the air supply mechanism (6) further comprises an air compression tank fixing frame (63) fixedly connected to the lower portion of the bottom panel of the window frame (1), and the air compression tank (61) is fixed to the window frame (1) through the connection of the air compression tank fixing frame (63) with the air compression tank; and an air injection pipeline (611) is connected to the air inlet of the air compression tank (61), and a check valve (612) is arranged on the air injection pipeline (611).