Exhaust adjusting mechanism of ventilation experiment cabinet

Abstract

The utility model discloses an air exhaust adjusting mechanism of a ventilation experiment cabinet, which comprises a rear cabinet plate and an air exhaust plate, and an air exhaust channel is formed between the rear cabinet plate and the air exhaust plate. An exhaust hole is formed in the exhaust plate, and the exhaust channel is communicated with an air flow in the ventilation chamber in the ventilation cabinet through the exhaust hole; an adjusting plate is arranged in the exhaust channel, the adjusting plate is attached to the exhaust plate, and an air volume adjusting hole is formed in the adjusting plate; the adjusting plate can ascend and descend in the exhaust channel to change the relative area of the air volume adjusting hole and the exhaust hole so as to adjust the exhaust air volume. The lower end of the adjusting plate is hinged to the lifting seat, an elastic part is arranged on the lifting seat, and the elastic part can push the adjusting plate to turn over towards the exhaust plate under the elastic action, so that the adjusting plate is attached to the exhaust plate; a top column is movably arranged on the exhaust plate and can movably move towards the adjusting plate, and the adjusting plate is jacked to incline in the direction away from the exhaust plate. According to the ventilation cabinet, the exhaust air rate of the ventilation cabinet can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of fume hoods, in particular to an exhaust adjustment mechanism of a fume experiment hood. Background Art

[0002] Fume hoods are one of the commonly used equipment in laboratories. When conducting experiments that produce harmful gases, they are usually carried out in fume hoods to avoid harmful gases from causing damage to the health of experimenters. Different experiments have different requirements for the exhaust volume of fume hoods, and most existing fume hoods cannot adjust the exhaust volume. Therefore, an exhaust adjustment mechanism for a ventilated experimental cabinet is proposed. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides an exhaust adjustment mechanism for a fume hood, which can adjust the exhaust volume of the fume hood.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides an exhaust adjustment mechanism for a fume hood, comprising a rear cabinet plate and an exhaust plate on the fume hood, an exhaust channel being formed between the rear cabinet plate and the exhaust plate; exhaust holes are provided on the exhaust plate, and the exhaust channel is connected with the airflow of the ventilation chamber in the fume hood through the exhaust holes; an adjustment plate is provided in the exhaust channel, the adjustment plate is fitted with the exhaust plate, and an air volume adjustment hole is provided on the adjustment plate; the adjustment plate can be raised and lowered in the exhaust channel to change the relative area between the air volume adjustment hole and the exhaust hole, thereby adjusting the exhaust volume.

[0005] Furthermore, the lower end of the adjustment plate is hinged on the lifting seat, and an elastic member is provided on the lifting seat. The elastic action of the elastic member can push the adjustment plate to flip toward the exhaust plate, so that the adjustment plate fits the exhaust plate.

[0006] Furthermore, a top column is movably provided on the exhaust plate, and the top column can be movably displaced toward the adjustment plate to push the adjustment plate to tilt in a direction away from the exhaust plate.

[0007] Furthermore, a ball is movably embedded on one end of the top column facing the adjustment plate; when the adjustment plate is lifted or displaced in an inclined state, the top column rolls with the adjustment plate through the ball.

[0008] Furthermore, a through hole is provided on the exhaust plate, the top column is slidably matched with the through hole, and the ball can be retracted into the through hole under the elastic action of the elastic member.

[0009] Furthermore, a bottom plate is provided at the bottom end of the exhaust passage, and the lifting seat is vertically slidably matched with the bottom plate; a screw hole is opened on the bottom plate, and an adjusting screw is matched with the inner thread of the screw hole, and when the adjusting screw is rotated, the lifting seat is lifted and lowered.

[0010] Beneficial effects: The exhaust adjustment mechanism of the ventilation test cabinet of the utility model has the following beneficial effects:

[0011] 1) There is a lifting and displacement adjustment plate in the exhaust duct. When the adjustment plate is lifted or lowered, the relative area between the air volume adjustment hole and the exhaust hole on the adjustment plate changes, thereby adjusting the exhaust volume of the fume hood;

[0012] 2) The lower end of the adjustment plate is hinged on the lifting seat, and the lifting seat is provided with an elastic member, which can press the adjustment plate against the exhaust plate to prevent airflow from passing between the adjustment plate and the exhaust plate, thereby avoiding noise and making the adjustment of the exhaust volume more precise; in addition, the upper end of the adjustment plate can be pushed up by the top column to tilt the adjustment plate and separate it from the exhaust plate, so as to change the height of the adjustment plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 This is a front view of the fume hood;

[0014] Attached Figure 2 It is a side view of the fume hood;

[0015] Attached Figure 3 It is a schematic diagram of the coordination between the exhaust plate and the adjustment plate. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] As attached Figures 1 to 3 The exhaust adjustment mechanism of the fume hood comprises a rear cabinet plate 2 and an exhaust plate 3 on the fume hood 1, an exhaust passage 4 is formed between the rear cabinet plate 2 and the exhaust plate 3, an exhaust hole 5 is provided on the exhaust plate 3, and the exhaust passage 4 is connected to the ventilation chamber 6 in the fume hood 1 through the exhaust hole 5. The exhaust passage 4 is connected to the circulating air system in the laboratory through the exhaust pipe 14, and the circulating air system has a gas circulation power device so that the exhaust passage 4 can generate suction to discharge the gas in the ventilation chamber 6 from the exhaust passage 4.

[0018] An adjustment plate 7 is provided in the exhaust passage 4, and the adjustment plate 7 is fitted with the exhaust plate 3, and an air volume adjustment hole 8 is provided on the adjustment plate 7. The adjustment plate 7 can be lifted and displaced in the exhaust passage 4 to change the relative area of ​​the air volume adjustment hole 8 and the exhaust hole 5, thereby adjusting the exhaust volume. The air volume adjustment hole 8 is consistent with the shape of the exhaust hole 5. When the air volume adjustment hole 8 is opposite to the exhaust hole 5, the exhaust volume of the exhaust hole 5 is the largest. As the air volume adjustment hole 8 and the exhaust hole 5 gradually stagger, the adjustment plate 7 will gradually block the exhaust hole 5, thereby reducing the exhaust volume of the exhaust hole 5.

[0019] The lower end of the adjustment plate 7 is hinged on the lifting seat 9, and the lifting seat 9 is provided with an elastic member 10. The elastic action of the elastic member 10 can push the adjustment plate 7 to flip toward the exhaust plate 3, so that the adjustment plate 7 fits the exhaust plate 3. The side of the adjustment plate 7 facing the exhaust plate 3 has an elastic rubber layer, so that the adjustment plate 7 can fit closely with the exhaust plate 3, thereby avoiding airflow between the adjustment plate 7 and the exhaust plate 3, avoiding noise, and making the adjustment of the exhaust volume more accurate.

[0020] The exhaust plate 3 is movably provided with a top column 11, which is opposite to the upper end of the adjustment plate 7. The top column 11 can be movably displaced toward the adjustment plate 7, and the upper end of the adjustment plate 7 is tilted away from the exhaust plate 3. Under the elastic action of the elastic member 10, the adjustment plate 7 is tightly fitted with the exhaust plate 3, and the friction resistance is too large, which makes it inconvenient to lift and lower the adjustment plate 7. After the adjustment plate 7 is tilted by the top column 11, the adjustment plate 7 is separated from the exhaust plate 3, and the adjustment plate 7 can be conveniently lifted and lowered.

[0021] A ball is movably embedded on one end of the top column 11 facing the adjustment plate 7. When the adjustment plate 7 is lifted or lowered in an inclined state, the top column 11 rolls with the adjustment plate 7 through the ball to reduce the friction between the top column 11 and the adjustment plate 7.

[0022] The exhaust plate 3 is provided with a through hole, and the top column 11 is slidably matched with the through hole. The elastic action of the elastic member 10 makes the ball retract into the through hole under the elastic action of the elastic member 10 when the adjustment plate 7 and the exhaust plate 3 are fitted together, so as to avoid the existence of the ball interfering with the fitting of the adjustment plate 7 and the exhaust plate 3.

[0023] As attached Figure 3 In one embodiment shown in , a bottom plate 12 is provided at the bottom end of the exhaust passage 4, the lifting seat 9 is vertically slidably matched with the bottom plate 12, a vertical guide rod is provided at the lower end of the lifting seat 9, a vertical guide hole is provided on the bottom plate 12, and the vertical guide rod is vertically slidably matched with the vertical guide hole. A screw hole is provided on the bottom plate 12, and an adjusting screw 13 is matched with the inner thread of the screw hole. A knob is provided at the lower end of the adjusting screw 13, and when the adjusting screw 13 is rotated, the lifting seat 9 is lifted and lowered.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An exhaust adjustment mechanism for a ventilation test cabinet, characterized in that: The fume hood (1) comprises a rear cabinet plate (2) and an exhaust plate (3), wherein an exhaust passage (4) is formed between the rear cabinet plate (2) and the exhaust plate (3); an exhaust hole (5) is provided on the exhaust plate (3), and the exhaust passage (4) is connected to a ventilation chamber (6) in the fume hood (1) through the exhaust hole (5); An adjustment plate (7) is arranged in the exhaust passage (4), the adjustment plate (7) is in contact with the exhaust plate (3), and an air volume adjustment hole (8) is provided on the adjustment plate (7); the adjustment plate (7) can be moved up and down in the exhaust passage (4) to change the relative area between the air volume adjustment hole (8) and the exhaust hole (5), thereby adjusting the exhaust volume.

2. The exhaust air regulating mechanism of a fume test cabinet according to claim 1, characterized in that: The lower end of the adjustment plate (7) is hinged on a lifting seat (9), and an elastic member (10) is provided on the lifting seat (9). The elastic action of the elastic member (10) can push the adjustment plate (7) to flip toward the exhaust plate (3), so that the adjustment plate (7) and the exhaust plate (3) are in contact with each other.

3. The exhaust air regulating mechanism of a fume test cabinet according to claim 2 is characterized in that: A top column (11) is movably provided on the exhaust plate (3), and the top column (11) can be movably displaced toward the adjustment plate (7), pushing the adjustment plate (7) to tilt in a direction away from the exhaust plate (3).

4. The exhaust air regulating mechanism of a fume test cabinet according to claim 3 is characterized in that: A ball is movably embedded on one end of the top column (11) facing the adjustment plate (7); when the adjustment plate (7) is lifted or displaced in an inclined state, the top column (11) rolls with the adjustment plate (7) through the ball.

5. The exhaust air regulating mechanism of a fume test cabinet according to claim 4, characterized in that: The exhaust plate (3) is provided with a through hole, the top column (11) is slidably matched with the through hole, and the ball can be retracted into the through hole under the elastic action of the elastic member (10).

6. The exhaust air regulating mechanism of a fume test cabinet according to claim 2, characterized in that: A bottom plate (12) is provided at the bottom end of the exhaust passage (4), and the lifting seat (9) is vertically slidably matched with the bottom plate (12); a screw hole is provided on the bottom plate (12), and an adjusting screw rod (13) is matched with the inner thread of the screw hole, and when the adjusting screw rod (13) is rotated, the lifting seat (9) is lifted or lowered.

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