Laboratory ventilation device

Abstract

The utility model relates to the technical field of ventilation equipment, and discloses a laboratory ventilation device which comprises a main exhaust pipe, the lower side of the main exhaust pipe is fixedly connected with a sealing ring unit, the inner side of the sealing ring unit is fixedly connected with a first mounting plate, the lower side of the sealing ring unit is fixedly connected with a branch exhaust pipe, and the inner side of the branch exhaust pipe is rotationally connected with a sleeve. The sleeve and the second mounting plate are pushed to rotate through the insertion rod, dust on the lower surface of a filter screen mounted on the hollowed-out groove of the first mounting plate can be automatically cleaned in the rotating process of the second mounting plate, the dust on the lower surface of the filter screen can be automatically removed, and the dust on the lower surface of the filter screen can be automatically removed. The filtering capacity of the filter screen is not influenced after long-time use, and the reliability and the stability of the anti-backflow function are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to laboratory ventilation equipment technical field especially, relates to a laboratory ventilation device. BACKGROUND

[0002] Generally, a plurality of experiment tables are arranged in the laboratory, and a dedicated exhaust hood is arranged on each experiment table, which is used for timely discharging the toxic and harmful gas possibly generated in the experiment, especially in the chemical experiment. In fact, the branch pipes arranged on each experiment table in the laboratory are collected into an exhaust main pipeline at the ceiling of the laboratory, so as to discharge the gas in the entire laboratory in a unified manner. However, the gas in the main pipeline may diffuse downward along the branch pipes, and thus, the laboratory ventilation device needs to be designed with a special anti-backflow function. However, the existing anti-backflow module in the laboratory ventilation device generally has problems in cleaning the anti-backflow assembly.

[0003] For example, a laboratory ventilation device is disclosed in the Chinese utility model patent with the publication number CN220187026U, which includes a gas collecting hood. The power output end of the electric push rod is connected to a first push block, and the first push block is connected to a second push block through a connecting rod. By matching the different extension states of the electric push rod and the first push block and the second push block, the opening angle of the louvered curtain can be upward or downward, thereby achieving the purpose of bidirectional anti-backflow ventilation in the laboratory. However, the anti-backflow of the louvered curtain has the problem that the structure of the louvered curtain is complex, and a large amount of dust is easily attached to the surface after long-term use, which may cause difficulties in opening and closing the louvered curtain, and thus, the anti-backflow function may fail. Therefore, a laboratory ventilation device is proposed. UTILITY MODEL CONTENTS

[0004] To solve the technical problem of anti-backflow of the laboratory ventilation equipment, the utility model provides a laboratory ventilation device.

[0005] The utility model adopts the following technical scheme: a laboratory ventilation device, including main exhaust pipe, the downside of main exhaust pipe is fixedly connected with seal ring unit, the inside of seal ring unit is fixedly connected with first mounting plate,

[0006] The downside of seal ring unit is fixedly connected with branch exhaust pipe, the inside of branch exhaust pipe is rotatably connected with sleeve, the upper end of sleeve is fixedly connected with second mounting plate,

[0007] A plurality of hollow grooves are formed in the first mounting plate and the second mounting plate, and the hollow grooves are arranged in a circular array. The inside of the hollow groove on the first mounting plate is provided with a filter screen. The inside of the sleeve is provided with an exhaust fan mechanism. The outside of the branch exhaust pipe is provided with an extension rod mechanism.

[0008] As a further improvement of the above-mentioned solution, the lower surface of the first mounting plate and the upper surface of the second mounting plate abut each other, the lower surface of the filter screen mounted on the first mounting plate is flush with the lower surface of the first mounting plate, and the upper surface of the filter screen mounted on the second mounting plate is flush with the upper surface of the second mounting plate.

[0009] As a further improvement of the above-mentioned solution, the air exhaust fan mechanism comprises a telescopic cylinder arranged inside the sleeve, a fan unit is fixedly connected to the inner side of the upper end of the telescopic cylinder, a sleeve driving mechanism is arranged on the outer side of the upper end of the telescopic cylinder to enable the sleeve to rotate inside the branch exhaust pipe, and an air duct mechanism is arranged at the lower end of the telescopic cylinder.

[0010] As a further improvement of the above-mentioned solution, the sleeve driving mechanism comprises a plurality of insertion slots formed in the inner wall of the sleeve, a plurality of insertion rods are fixedly connected to the outer side of the upper end of the telescopic cylinder, and the plurality of insertion rods are arranged in one-to-one correspondence with the plurality of insertion slots.

[0011] As a further improvement of the above-mentioned solution, the air duct mechanism comprises a wind collecting cover fixedly communicated with the lower end of the telescopic cylinder, and the length of the telescopic cylinder is slightly smaller than the length of the branch exhaust pipe.

[0012] As a further improvement of the above-mentioned solution, the telescopic rod mechanism comprises a sliding cylinder fixedly connected to the outer side of the branch exhaust pipe, a sliding rod is slidingly connected to the inner side of the sliding cylinder, the lower end of the sliding rod is fixedly connected to the upper side of the wind collecting cover, and a positioning mechanism is arranged on the outer side of the sliding cylinder.

[0013] As a further improvement of the above-mentioned solution, the positioning mechanism comprises a threaded pin threadedly connected to the outer side of the sliding cylinder, and the end of the threaded pin away from the sliding cylinder is fixedly connected with a hand wheel.

[0014] As a further improvement of the above-mentioned solution, when the insertion rod is located at the highest starting position of the insertion slot close to the sealing ring unit, the hollow groove of the second mounting plate is also at the starting position relative to the first mounting plate, the hollow grooves on the first mounting plate and the second mounting plate are staggered with each other, and the filter screens mounted in the plurality of hollow grooves are in a blocked state.

[0015] When the insertion rod starts to slide downward along the insertion slot, the sleeve rotates, the hollow groove of the second mounting plate moves away from the starting position, and the second mounting plate pushes the lower surface of the filter screen on the first mounting plate to clean the surface dust.

[0016] When the insertion rod slides along the insertion slot and moves to the lowest end of the insertion slot, the hollow slot on the first mounting plate and the hollow slot of the second mounting plate are aligned with each other, and the filter screen installed at the plurality of hollow slots is in a pass-through state.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1、The utility model discloses a sleeve and second mounting plate are rotated by insertion rod, can carry out automatic cleaning to the dust on the filter screen lower surface of hollow slot of first mounting plate in the second mounting plate rotation process, long -time use does not influence the filtering capacity of filter screen, has improved the reliability and stability of anti -backflow function.

[0019] 2、The utility model discloses a telescopic barrel, branch exhaust pipe, telescopic rod mechanism and positioning mechanism cooperate with each other, when the experiment is finished, can push up telescopic barrel and wind collecting cover and be convenient for storage, when needing experiment, again put down telescopic barrel and wind collecting cover, thereby can play the effect of reducing the occupied space of this ventilation device. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic diagram of laboratory ventilation device provided by the utility model;

[0021] Figure 2 It is the explosion structure schematic diagram of Figure 1 ;

[0022] Figure 3 It is the sectional view of Figure 1 ;

[0023] Figure 4 It is the explosion structure schematic diagram of Figure 3 ;

[0024] Figure 5 It is the structure schematic diagram of A of Figure 3 ;

[0025] MAIN SYMBOL DESCRIPTION

[0026] 1, main exhaust pipe;2, sealing ring unit;3, branch exhaust pipe;4, telescopic barrel;5, wind collecting cover;6, slide rod;7, threaded pin;8, slide cylinder;9, insertion rod;10, fan unit;11, first mounting plate;12, filter screen;13, sleeve;14, insertion slot;15, second mounting plate. DETAILED DESCRIPTION

[0027] Below, combining the drawings and specific implementation, the utility model is further described, need explaining that, under the premise of not conflicting, the following description between each embodiment of the following description or between each technical feature can be combined to form a new embodiment.

[0028] Embodiment:

[0029] Please combine Figures 1-5 , a laboratory ventilation device of the embodiment, comprising a main exhaust pipe 1, the lower side of the main exhaust pipe 1 is fixedly connected with a sealing ring unit 2, the sealing ring unit 2 is designed to be detachable, the inner side of the sealing ring unit 2 is fixedly connected with a first mounting plate 11;

[0030] The lower side of the sealing ring unit 2 is fixedly connected with a branch exhaust pipe 3, the inner side of the branch exhaust pipe 3 is rotatably connected with a sleeve 13, the upper end of the sleeve 13 is fixedly connected with a second mounting plate 15;

[0031] In the embodiment, four hollow grooves are formed on the first mounting plate 11 and the second mounting plate 15, the four hollow grooves are arranged in a circular array, the inner side of the four hollow grooves is provided with a filter screen 12, the inner side of the sleeve 13 is provided with an exhaust fan mechanism, and the outer side of the branch exhaust pipe 3 is provided with an extension rod mechanism.

[0032] Please combine Figure 5 As shown in the figure, the lower surface of the first mounting plate 11 and the upper surface of the second mounting plate 15 abut each other, the lower surface of the filter screen 12 installed on the first mounting plate 11 is flush with the lower surface of the first mounting plate 11, and the upper surface of the filter screen 12 installed on the second mounting plate 15 is flush with the upper surface of the second mounting plate 15.

[0033] Please combine Figure 2 and 3 As shown in the figure, the exhaust fan mechanism comprises a telescopic cylinder 4 arranged inside the sleeve 13, the inner side of the upper end of the telescopic cylinder 4 is fixedly connected with a fan unit 10, the fan unit 10 can exhaust the gas generated in the experiment, the outer side of the upper end of the telescopic cylinder 4 is provided with a sleeve driving mechanism for rotating the sleeve 13 inside the branch exhaust pipe 3, and the lower end of the telescopic cylinder 4 is provided with an air duct mechanism.

[0034] In the embodiment, the sleeve driving mechanism comprises four insertion grooves 14 formed in the inner wall of the sleeve 13, it should be particularly pointed out that, in the embodiment, the insertion groove 14 is designed in a spiral structure, one complete insertion groove 14 from the highest point to the lowest point can be twisted by 45 degrees, that is, the sleeve 13 can be rotated by 45 degrees, the outer side of the upper end of the telescopic cylinder 4 is fixedly connected with four insertion rods 9, and the four insertion rods 9 are arranged in one-to-one correspondence with the four insertion grooves 14.

[0035] Please combine Figure 1 As shown in the figure, the air duct mechanism comprises a wind collecting cover 5 fixedly communicated with the lower end of the telescopic cylinder 4, and the tube length of the telescopic cylinder 4 is slightly smaller than the tube length of the branch exhaust pipe 3.

[0036] Please combine Figure 1As shown, the telescopic rod mechanism comprises a sliding cylinder 8 fixedly connected to the outer side of the branch exhaust pipe 3, the inner side of the sliding cylinder 8 is slidingly connected with a sliding rod 6, the lower end of the sliding rod 6 is fixedly connected with the upper side of the air collecting cover 5, and the outer side of the sliding cylinder 8 is provided with a positioning mechanism.

[0037] Please combine Figure 1 As shown, the positioning mechanism comprises a threaded pin 7 threadedly sleeved with the outer side of the sliding cylinder 8, and the end of the threaded pin 7 away from the sliding cylinder 8 is fixedly connected with a hand wheel.

[0038] When the plug rod 9 is located at the highest starting position of the insertion slot 14 close to the sealing ring unit 2, the hollow grooves of the second mounting plate 15 are also at the starting position relative to the first mounting plate 11, the hollow grooves on the first mounting plate 11 are staggered with the hollow grooves of the second mounting plate 15, and the filter screens 12 installed at the hollow grooves are in a blocked state.

[0039] When the plug rod 9 starts to slide downward along the insertion slot 14, the sleeve 13 rotates, the hollow grooves of the second mounting plate 15 are away from the starting position, and the second mounting plate 15 pushes the lower surface of the filter screen 12 on the first mounting plate 11, so that the surface dust can be cleaned.

[0040] When the plug rod 9 slides downward along the insertion slot 14 and moves to the lowest end point of the insertion slot 14, the hollow grooves on the first mounting plate 11 are aligned with the hollow grooves of the second mounting plate 15, and the filter screens 12 installed at the hollow grooves are in a pass-through state.

[0041] The implementation principle of the laboratory ventilation device in the embodiment of the application is as follows: a user first opens the threaded pin 7, releases the sliding rod 6, and makes the air collecting cover 5 and the telescopic cylinder 4 fall, and the plug rod 9 slides downward along the insertion slot 14, and due to the limiting effect of the sliding rod 6, the sleeve 13 and the second mounting plate 15 rotate, when the plug rod 9 moves to the end position of the insertion slot 14, the rotation angle of the second mounting plate 15 is just enough to make the filter screen 12 installed on the second mounting plate 15 coincide with the filter screen 12 installed on the first mounting plate 11, forming a pass-through, and vice versa, when the air collecting cover 5 and the telescopic cylinder 4 need to be pushed upward and stored after the experiment is completed, the sleeve 13 and the second mounting plate 15 rotate reversely, and at this time, the second mounting plate 15 can block the filter screen 12 on the first mounting plate 11 above.

[0042] The above-mentioned embodiment is only a preferred embodiment of the application, and cannot be used to limit the protection scope of the application, and any non-essential change and replacement made by a person skilled in the art on the basis of the application all belong to the protection scope of the application.

Claims

1. A laboratory ventilation device, comprising a main exhaust duct (1), characterized in that, A sealing ring unit (2) is fixedly connected to the lower side of the main exhaust duct (1), and a first mounting plate (11) is fixedly connected to the inner side of the sealing ring unit (2). The lower side of the sealing ring unit (2) is fixedly connected to a branch exhaust pipe (3), the inner side of the branch exhaust pipe (3) is rotatably connected to a sleeve (13), and the upper end of the sleeve (13) is fixedly connected to a second mounting plate (15). Both the first mounting plate (11) and the second mounting plate (15) have multiple hollow slots, which are arranged in a circular array. The hollow slots on the first mounting plate (11) are provided with a filter screen (12) on the inner side of each hollow slot. The sleeve (13) is provided with an exhaust fan mechanism on the inner side, and the branch exhaust pipe (3) is provided with a telescopic rod mechanism on the outer side.

2. A laboratory ventilation device as described in claim 1, characterized in that, The lower surface of the first mounting plate (11) abuts against the upper surface of the second mounting plate (15). The lower surface of the filter screen (12) installed on the first mounting plate (11) is flush with the lower surface of the first mounting plate (11). The upper surface of the filter screen (12) installed on the second mounting plate (15) is flush with the upper surface of the second mounting plate (15).

3. A laboratory ventilation device as described in claim 1, characterized in that, The exhaust fan mechanism includes a telescopic cylinder (4) disposed inside the sleeve (13). A fan unit (10) is fixedly connected to the inner side of the upper end of the telescopic cylinder (4). A sleeve drive mechanism is disposed on the outer side of the upper end of the telescopic cylinder (4) to make the sleeve (13) rotate inside the branch exhaust duct (3). A duct mechanism is disposed at the lower end of the telescopic cylinder (4).

4. A laboratory ventilation device as described in claim 3, characterized in that, The sleeve drive mechanism includes multiple slots (14) opened on the inner wall of the sleeve (13), and multiple insert rods (9) are fixedly connected to the upper outer side of the telescopic cylinder (4). The multiple insert rods (9) are paired with the multiple slots (14) one by one.

5. A laboratory ventilation device as described in claim 3, characterized in that, The air duct mechanism includes an air collecting hood (5) that is fixedly connected to the lower end of the telescopic cylinder (4), and the length of the telescopic cylinder (4) is slightly less than the length of the branch exhaust duct (3).

6. A laboratory ventilation device as described in claim 5, characterized in that, The telescopic rod mechanism includes a slide cylinder (8) fixedly connected to the outside of the branch exhaust duct (3), a slide rod (6) slidably connected to the inside of the slide cylinder (8), the lower end of the slide rod (6) being fixedly connected to the upper side of the air collecting hood (5), and a positioning mechanism being provided on the outside of the slide cylinder (8).

7. A laboratory ventilation device as described in claim 6, characterized in that, The positioning mechanism includes a threaded pin (7) that is threadedly engaged with the outer side of the slide (8), and a handwheel is fixedly connected to one end of the threaded pin (7) away from the slide (8).

8. A laboratory ventilation device as described in claim 4, characterized in that, When the insertion rod (9) is located at the highest starting position of the slot (14) near the sealing ring unit (2), the hollow groove of the second mounting plate (15) is also at the starting position relative to the first mounting plate (11). The hollow groove on the first mounting plate (11) and the hollow groove on the second mounting plate (15) are offset from each other, and the filter screens (12) installed at the multiple hollow grooves are in a blocked state. When the insert (9) begins to slide downward along the slot (14), the sleeve (13) rotates, the hollow groove of the second mounting plate (15) leaves the starting position, and the second mounting plate (15) pushes the lower surface of the filter screen (12) of the first mounting plate (11) to clean the surface dust. When the insert (9) slides down along the slot (14) and moves to the lowest end point of the slot (14), the hollow groove on the first mounting plate (11) is aligned with the hollow groove on the second mounting plate (15), and the filter screens (12) installed at the multiple hollow grooves are in a pass-through state.

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