Variable air volume adjusting device of laboratory exhaust cabinet

Abstract

The utility model relates to the technical field of exhaust cabinets, and discloses a laboratory exhaust cabinet variable air volume adjusting device which comprises an exhaust cabinet, a rectangular groove is formed in one side of the surface of the exhaust cabinet, a window is connected to the surface of the rectangular groove in a sliding mode, a limiting block is fixedly connected to one side of the window, a U-shaped block is fixedly connected to the surface of the limiting block, and the U-shaped block is fixedly connected to the surface of the rectangular groove. The two sides of the U-shaped block are slidably connected with air collecting boxes. According to the variable air volume adjusting device for the laboratory exhaust cabinet, by arranging the window, the limiting block, the U-shaped block, the air collecting box, a baffle, a connecting block, a guide rod and a hydraulic rod, when the window needs to be lifted, the hydraulic rod is opened to drive the guide rod and the connecting block to move upwards, and then the window is driven to slide upwards in a rectangular groove of the exhaust cabinet; therefore, a U-shaped block on a limiting block on one side of the window is driven to move upwards, a baffle is driven to be separated from a groove in the bottom of the air collecting box, and the air collecting box can suck air in a rectangular groove of the exhaust cabinet through the groove.

Description

Technical Field

[0001] The utility model relates to the technical field of fume hoods, in particular to a variable air volume regulating device for a laboratory fume hood. Background Art

[0002] Laboratory ventilation is an indispensable component of laboratory design. In order to prevent laboratory workers from inhaling or swallowing some toxic, pathogenic or unknown toxic chemicals and organisms, the laboratory should have good ventilation. In order to prevent the absorption of some vapors, gases and particles (smoke, soot, dust and aerosols), pollutants must be removed by fume hoods, hoods or local ventilation. Fume hoods are the most commonly used local exhaust equipment in laboratories. There are many types of them. Due to their different structures and different conditions of use, their exhaust effects are also different. The performance of the fume hood depends mainly on the speed at which the air moves through the fume hood.

[0003] At present, the variable air volume control devices of laboratory fume hoods on the market have the following disadvantages: general fume hoods use displacement sensors to measure the opening height of the fume hood windows and the window width sensor to calculate the window opening area or use a surface wind speed sensor, which is calculated by a computer and then driven by an electric actuator or pneumatic to drive the valve opening size. This method has a complex structure and control system and consumes energy, and the control process has a certain delay;

[0004] For this purpose, we designed a variable air volume control device for laboratory exhaust cabinets. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The technical problem solved by the utility model is to provide a laboratory exhaust cabinet variable air volume adjustment device which is highly practical, can be simply operated and has a relatively simple structure, thereby solving the problem of a certain delay in controlling the opening size of a valve proposed in the above background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the utility model is implemented through the following technical solutions: a variable air volume adjustment device for a laboratory exhaust hood, comprising an exhaust hood, a rectangular groove is provided on one side of the surface of the exhaust hood, a window is slidably connected to the surface of the rectangular groove, a limiting block is fixedly connected to one side of the window, a U-shaped block is fixedly connected to the surface of the limiting block, air collecting boxes are slidably connected to both sides of the U-shaped block, both sides of the air collecting box are fixedly connected to the inner wall of the rectangular groove, a baffle is fixedly connected to the bottom of the U-shaped block, a circular hole is provided on the surface of the baffle, and a groove matching the baffle is provided at the bottom of the air collecting box.

[0009] Optionally, a connecting block is fixedly connected to the bottom of the window, and a guide rod is fixedly connected to the top of the connecting block. The guide rod can drive the connecting block to move through a hydraulic rod.

[0010] Optionally, a hydraulic rod is fixedly connected to the surface of the guide rod, and the hydraulic rod can reduce the work of manually opening the window. The bottom of the hydraulic rod is fixedly connected to the top of the exhaust cabinet.

[0011] Optionally, a cover is fixedly connected to the top of the air collecting box, a duct is connected through the surface of the cover, one end of the duct passes through the top of the exhaust cabinet, and the duct is connected to an external exhaust duct to exhaust the interior of the device.

[0012] Optionally, limit bars are fixedly connected to both sides of the exhaust cabinet, and the limit bars can maintain vertical up and down movement when the connecting block and the guide rod are movable, and the surface of the limit bars is slidably connected to the connecting block and the guide rod.

[0013] Optionally, a cabinet door is hingedly connected to the other side of the surface of the fume hood through a hinge, and the cabinet door can be opened to put some experimental supplies into the interior of the device. A foot pad is fixedly connected to the bottom of the fume hood.

[0014] (III) Beneficial effects

[0015] The utility model provides a variable air volume regulating device for a laboratory exhaust cabinet, which has the following beneficial effects:

[0016] The variable air volume adjustment device of the laboratory exhaust cabinet is provided with a window, a limit block, a U-shaped block, an air collecting box, a baffle, a connecting block, a guide rod and a hydraulic rod. When the window needs to be raised, the hydraulic rod is opened to drive the guide rod and the connecting block to move upward, thereby driving the window to slide upward inside the rectangular groove of the exhaust cabinet, thereby driving the U-shaped block on the limit block on one side of the window to move upward, driving the baffle to separate from the groove at the bottom of the air collecting box, so that the air collecting box can inhale the air in the rectangular groove of the exhaust cabinet through the groove, thereby playing the role of opening the window and adjusting the exhaust size in the rectangular groove at the same time, reducing the delay of the exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 This is a schematic diagram of the back cross-sectional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the window structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the front cross-sectional structure of the utility model.

[0021] In the figure: 1. exhaust cabinet; 2. window; 3. limit block; 4. U-shaped block; 5. air collecting box; 6. baffle; 7. connecting block; 8. guide rod; 9. hydraulic rod; 10. cover plate; 11. duct; 12. limit strip; 13. foot pad. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 4 The utility model provides a technical solution: a variable air volume adjustment device for a laboratory exhaust cabinet, comprising an exhaust cabinet 1, a rectangular groove is provided on one side of the surface of the exhaust cabinet 1, a window 2 is slidably connected to the surface of the rectangular groove, a limiting block 3 is fixedly connected to one side of the window 2, a U-shaped block 4 is fixedly connected to the surface of the limiting block 3, an air collecting box 5 is slidably connected to both sides of the U-shaped block 4, both sides of the air collecting box 5 are fixedly connected to the inner wall of the rectangular groove, a baffle 6 is fixedly connected to the bottom of the U-shaped block 4, a round hole is provided on the surface of the baffle 6, and the bottom of the air collecting box 5 A groove adapted to the baffle 6 is provided. When the window 2 needs to be raised, the hydraulic rod 9 is opened to drive the guide rod 8 and the connecting block 7 to move upward, thereby driving the window 2 to slide upward inside the rectangular groove of the exhaust cabinet 1, thereby driving the U-shaped block 4 on the limit block 3 on one side of the window 2 to move upward, driving the baffle 6 to separate from the groove at the bottom of the air collecting box 5, so that the air collecting box 5 can inhale the air in the rectangular groove of the exhaust cabinet 1 through the groove, thereby opening the window 2 and adjusting the exhaust size in the rectangular groove at the same time, reducing the delay of the exhaust;

[0024] The bottom of the window 2 is fixedly connected with a connecting block 7, and the top of the connecting block 7 is fixedly connected with a guide rod 8, and the guide rod 8 can drive the connecting block 7 to move through a hydraulic rod 9;

[0025] A hydraulic rod 9 is fixedly connected to the surface of the guide rod 8, and the hydraulic rod 9 can reduce the work of manually opening the window 2, and the bottom of the hydraulic rod 9 is fixedly connected to the top of the exhaust cabinet 1;

[0026] A cover plate 10 is fixedly connected to the top of the air collecting box 5, and a duct 11 is connected to the surface of the cover plate 10. One end of the duct 11 passes through the top of the exhaust cabinet 1, and the duct 11 is connected to an external exhaust pipe to exhaust air inside the device;

[0027] The two sides of the exhaust cabinet 1 are fixedly connected with the limit strips 12, and the limit strips 12 can maintain vertical up and down movement when the connecting block 7 and the guide rod 8 are active, and the surface of the limit strips 12 is slidably connected with the connecting block 7 and the guide rod 8;

[0028] A cabinet door is hingedly connected to the other side of the surface of the fume hood 1 through a hinge. The cabinet door can be opened to put some experimental supplies into the interior of the device. A foot pad 13 is fixedly connected to the bottom of the fume hood 1.

[0029] In the utility model, the working steps of the device are as follows:

[0030] When it is necessary to lift the window 2, open the hydraulic rod 9 to drive the guide rod 8 and the connecting block 7 to move upward, thereby driving the window 2 to slide upward inside the rectangular groove of the exhaust cabinet 1, thereby driving the U-shaped block 4 on the limit block 3 on one side of the window 2 to move upward, driving the baffle 6 to disengage from the groove at the bottom of the air collecting box 5, so that the air collecting box 5 can inhale the air in the rectangular groove of the exhaust cabinet 1 through the groove, thereby opening the window 2 and adjusting the exhaust size in the rectangular groove at the same time. When the window 2 is closed, the baffle 6 blocks the groove at the bottom of the air collecting box 5, and exhausts air through the circular holes on the surface of the baffle 6.

[0031] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0032] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable air volume control device for a laboratory fume hood, comprising an fume hood (1), characterized in that: A rectangular groove is provided on one side of the surface of the exhaust cabinet (1); a window (2) is slidably connected to the surface of the rectangular groove; a limiting block (3) is fixedly connected to one side of the window (2); a U-shaped block (4) is fixedly connected to the surface of the limiting block (3); an air collecting box (5) is slidably connected to both sides of the U-shaped block (4); both sides of the air collecting box (5) are fixedly connected to the inner wall of the rectangular groove; a baffle (6) is fixedly connected to the bottom of the U-shaped block (4); a circular hole is provided on the surface of the baffle (6); and a groove matching the baffle (6) is provided at the bottom of the air collecting box (5).

2. A variable air volume regulating device for a laboratory exhaust hood according to claim 1, characterized in that: The bottom of the viewing window (2) is fixedly connected to a connecting block (7), and the top of the connecting block (7) is fixedly connected to a guide rod (8).

3. A variable air volume regulating device for a laboratory exhaust hood according to claim 2, characterized in that: A hydraulic rod (9) is fixedly connected to the surface of the guide rod (8), and the bottom of the hydraulic rod (9) is fixedly connected to the top of the exhaust cabinet (1).

4. A variable air volume regulating device for a laboratory fume hood according to claim 1, characterized in that: The top of the air collecting box (5) is fixedly connected to a cover plate (10), the surface of the cover plate (10) is connected through a duct (11), and one end of the duct (11) passes through the top of the exhaust cabinet (1).

5. A variable air volume regulating device for a laboratory fume hood according to claim 1, characterized in that: Limiting strips (12) are fixedly connected to both sides of the exhaust cabinet (1), and a connecting block (7) and a guide rod (8) are slidably connected to the surface of the limiting strip (12).

6. A variable air volume regulating device for a laboratory fume hood according to claim 1, characterized in that: A cabinet door is hingedly connected to the other side of the surface of the exhaust cabinet (1) via a hinge, and a foot pad (13) is fixedly connected to the bottom of the exhaust cabinet (1).

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