CN215543578U - Chemistry experiment uses fume chamber with adjustable moment in room - Google Patents

Abstract

The utility model relates to the technical field of a fume hood, in particular to a torque-adjustable fume hood for a chemical laboratory, which comprises a hood body, a supporting table, a motor, a Hall element and a PLC (programmable logic controller), wherein the Hall element is fixed on the motor, the PLC is fixed on one side of the hood body, the current value on the motor is detected through the Hall element, the current value is converted into the torque of a shielding plate of the fume hood through the PLC, the torque value of the shielding plate of the fume hood is set, the shielding plate can rise back when encountering an obstacle and making an external force reach the torque value in the downward movement process of the shielding plate, the PLC controls the motor to rotate reversely and makes the shielding plate rise, so that the shielding plate can rise back when encountering the situation of increasing the torque in the descending process of the shielding plate, thereby playing a protective role for an operator and improving the use safety of the fume hood.

Description

Chemistry experiment uses fume chamber with adjustable moment in room

Technical Field

The utility model relates to the technical field of fume hoods, in particular to a moment-adjustable fume hood for a chemical laboratory.

Background

In the laboratory of scientific research, electronic fume chamber is indispensable, and electronic fume chamber can be used for carrying out the chemistry experiment and be used for placing article such as chemistry experiment instrument reagent, simultaneously, plays the efficiency of airing exhaust and taking a breath in the laboratory.

However, there is very big defect in current electronic fume chamber in the use, current electronic fume chamber can not realize at the downstream in-process, run into automatic rising under the condition of great moment, in the use, press from both sides the injury operator easily, the security of using is reduced, current electronic fume chamber uses not nimble enough, can not nimble pull operation base station, be unfavorable for using and accomodating, current electronic fume chamber is in the use, and is stable inadequately, has reduced the reliability of using.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a moment-adjustable fume hood for a chemical laboratory.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a moment-adjustable ventilation cabinet for a chemical laboratory comprises a cabinet body, a supporting table, a motor, Hall elements and a PLC (programmable logic controller), wherein an inner cavity is formed in one side of the cabinet body, the supporting table is installed in the inner cavity, a pull plate is in sliding fit with the top of the supporting table and is supported by the supporting table, so that the pull plate is at a certain height, a user can conveniently carry out chemical experiments, a plurality of sliding rods are fixedly welded on the supporting table, a lifting frame is in sliding fit with the plurality of sliding rods, a shielding plate is welded at the bottom of the lifting frame, a nut is horizontally welded on one side, away from the shielding plate, of the lifting frame, the motor is vertically installed at the top of the cabinet body, a lead screw is arranged at the bottom end of the motor, the lead screw is in threaded fit with the nut, the Hall elements are fixed on the motor, the PLC is fixed at one end of the cabinet body, and the Hall elements are fixed on the motor, a PLC controller is fixed on one side of the cabinet body, a current value on a motor is detected through a Hall element, the current value is converted into the torque of the shielding plate of the fume hood through the PLC controller, the torque value of the shielding plate of the fume hood is set, when the shielding plate moves downwards, an obstacle is encountered, external force reaches a torque value, the PLC controller controls the motor to rotate reversely, the shielding plate is lifted, and therefore the shielding plate can be lifted up under the condition that the moment is increased when the shielding plate descends, and an operator is protected;

wherein, support columns are welded at four corners of the bottom end of the support platform, the support platform is fixed in the inner cavity through the support columns, the support column is welded on the top of the support platform, so that a space is reserved at the bottom of the support platform to provide a space for storing chemical experimental instruments, thereby improving the size of the inner space of the fume hood and increasing the capacity of the fume hood, the top of the supporting platform is welded with a plurality of slide rails, the sections of the plurality of slide rails are all in an I-shaped structure, the pulling plate is in sliding fit with the top of the supporting platform through the plurality of slide rails, the pull plate is arranged, a platform is provided for the operation of chemical experiments, the pull plate is in sliding fit with the top of the supporting platform, so that the pull plate can be flexibly drawn out of and sent back from the inner cavity, and simultaneously, after the use, with the arm-tie propelling movement in the inner chamber, realized fine accomodating to the chemical laboratory glassware on arm-tie and the arm-tie.

Preferably, a plurality of supporting legs is installed to the bottom screw-thread fit of the cabinet body, and the plastic pad has all been bonded to the bottom of a plurality of supporting legs, and a plurality of gyro wheel is installed to the bottom of the cabinet body, through setting up the plastic pad in the supporting legs bottom, increases the frictional force on this fume chamber and ground to improve the stability that this fume chamber was laid, through setting up the gyro wheel, offer the facility for the removal transportation of this fume chamber.

Preferably, one side of the cabinet body is articulated to have two door plants, and two door plants are located the both sides of inner chamber respectively, and the catching groove has all been seted up to one side that the inner chamber was kept away from to two door plants, through setting up the door plant, can avoid the dust to get into the cabinet body, through setting up the catching groove, facilitates for opening and closing of door plant.

Preferably, the top welding of arm-tie has the handle, the handle is located the one end that the arm-tie is close to the door plant, the bottom welding of arm-tie has a plurality of slider, through setting up the handle, for taking the arm-tie out and facilitating, thereby improve the convenience that this fume chamber used, the spout has all been seted up to the bottom of a plurality of slider, the cross-section size of spout and the big or small looks adaptation in slide rail cross-section, the slider passes through spout sliding fit on the slide rail, at arm-tie bottom welding slider, with arm-tie sliding fit on the slide rail through the slider, make the arm-tie gliding more stable in the front and back, avoid the in-process of pull arm-tie, chemical laboratory glassware on the arm-tie emptys.

Preferably, the crane cross section is "mouthful" style of calligraphy structure, and the slide opening has been seted up at crane top four corners, and slide bar sliding fit is in the slide opening, and the crane passes through slide opening sliding fit on the slide bar, sets up the slide opening in crane top four corners, makes crane sliding fit on the slide bar through the slide opening to it is more stable to make the crane reciprocate.

Preferably, the ventilation pipe is installed at the top of the cabinet body, and the inside and the inner chamber of ventilation pipe link up, and through setting up the ventilation pipe, make this fume chamber carry out the chemistry experiment in-process, smog and smell can upwards discharge through the ventilation pipe.

The utility model has the beneficial effects that:

(1) the torque-adjustable ventilation cabinet for the chemical laboratory, disclosed by the utility model, is characterized in that the supporting table is arranged in the inner cavity, the pull plate is in sliding fit with the top of the supporting table, the pull plate is supported by the supporting table and is positioned at a certain height, so that a user can conveniently carry out a chemical experiment, the supporting column is welded on the top of the supporting table, a space is reserved at the bottom of the supporting table to provide a space for storing chemical experiment instruments, so that the size of the inner space of the ventilation cabinet is increased, the capacity of the ventilation cabinet is increased, a platform is provided for chemical experiment operation by arranging the pull plate, the pull plate can be flexibly drawn out of and sent back from the inner cavity by sliding the pull plate on the top of the supporting table, the flexibility of the use of the ventilation cabinet is improved, meanwhile, after the use is finished, the pull plate is pushed into the inner cavity, and the chemical experiment instruments on the pull plate are well stored, and then improved this fume chamber to the protection effect of chemical experiment instrument, at arm-tie bottom welding slider, through slider with arm-tie sliding fit on the slide rail, make the arm-tie gliding more stable in the front and back, avoid the in-process of pull arm-tie, chemical experiment instrument on the arm-tie emptys to improve the reliability that this fume chamber used.

(2) The moment-adjustable fume hood for the chemical laboratory is characterized in that a screw rod is rotated by a motor, a nut is driven to move up and down on the screw rod by rotating the screw rod, the nut drives a lifting frame to move up and down a lifting frame, a baffle plate is driven to move up and down by moving the lifting frame up and down, an inner cavity of the fume hood can be shielded by moving the baffle plate downwards, so that chemical experimental instruments and reagents placed in the inner cavity are protected, the protection effect of the fume hood on the chemical experimental instruments is further improved, a pull plate can pass through the lifting frame by setting the cross section of the lifting frame to be in a structure like a Chinese character 'kou', the chemical experimental articles on the pull plate are prevented from being crushed when the lifting frame moves downwards, the use reliability of the fume hood is further improved, four corners of the top of the lifting frame are provided with slide holes, and the lifting frame is in slide fit on a slide rod through the slide holes, thereby make the crane reciprocate more stable, further improve the reliability of using.

(3) According to the moment-adjustable fume hood for the chemical laboratory, the Hall element is fixed on the motor, the PLC is fixed on one side of the hood body, the current value on the motor is detected through the Hall element, the current value is converted into the torque of the shielding plate of the fume hood through the PLC, the torque value of the shielding plate of the fume hood is set, when the shielding plate moves downwards, an obstacle is encountered, the external force reaches the torque value, the PLC controls the motor to rotate reversely, the shielding plate is lifted, and therefore when the shielding plate descends, the shielding plate can be lifted back under the condition that the torque is increased, the effect of protecting an operator is achieved, and the use safety of the fume hood is improved.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of the internal structure of the present invention.

Fig. 3 is a schematic view of the structure of the pulling plate of the present invention.

Figure 4 is a top view of the crane of the present invention.

Fig. 5 is a schematic structural diagram of the motor of the present invention.

In the figure: 1. a cabinet body; 101. supporting legs; 102. a roller; 2. an inner cavity; 3. a support table; 301. a slide rail; 4. a door panel; 401. buckling grooves; 5. pulling a plate; 501. a handle; 502. a slider; 6. a lifting frame; 601. a shielding plate; 602. a slide hole; 603. a nut; 7. a slide bar; 8. a motor; 801. a screw rod; 9. a Hall element; 10. a PLC controller; 11. and a vent pipe.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

As shown in fig. 1-5, the moment-adjustable fume hood for chemical laboratory of the utility model comprises a cabinet body 1, a supporting platform 3, a motor 8, a hall element 9 and a PLC controller 10 (model: CPM1A), wherein one side of the cabinet body 1 is provided with an inner cavity 2, the supporting platform 3 is installed in the inner cavity 2, the top of the supporting platform 3 is in sliding fit with a pulling plate 5, the pulling plate 5 is supported by the supporting platform 3, so that the pulling plate 5 is at a certain height, thereby facilitating the chemical experiment of a user, the supporting platform 3 is fixedly welded with a plurality of sliding rods 7, a lifting frame 6 is in sliding fit with the plurality of sliding rods 7, the bottom of the lifting frame 6 is welded with a shielding plate 601, one side of the lifting frame 6 far away from the shielding plate 601 is horizontally welded with a nut 603, the top of the cabinet body 1 is vertically provided with the motor 8, the bottom end of the motor 8 is provided with a screw rod 801, and the screw rod 801 is in the nut 603, the Hall element 9 is fixed on the motor 8, the PLC 10 is fixed at one end of the cabinet body 1, the Hall element 9 is fixed on the motor 8, the PLC 10 is fixed at one side of the cabinet body 1, the current value on the motor 8 is detected through the Hall element 9, the current value is converted into the torque of the shielding plate 601 of the fume hood through the PLC, the torque value of the shielding plate 601 of the fume hood is set, in the downward moving process of the shielding plate 601, an obstacle is encountered, the external force reaches the torque value, the PLC controls the motor 8 to rotate reversely, the shielding plate 601 is raised, and therefore in the descending process of the shielding plate 601, under the condition that the torque is increased, the shielding plate 601 can be raised back, an operator is protected, and the use safety of the fume hood is improved;

wherein, the bottom four corners of the supporting platform 3 are welded with supporting columns, the supporting platform 3 is fixed in the inner cavity 2 through the supporting columns, the supporting columns are welded at the top of the supporting platform 3, so that the bottom of the supporting platform 3 is reserved with space for storing chemical experimental instruments, thereby improving the size of the inner space of the fume hood and increasing the capacity of the fume hood, the top of the supporting platform 3 is welded with a plurality of sliding rails 301, the cross sections of the plurality of sliding rails 301 are all in an I-shaped structure, the pulling plate 5 is in sliding fit at the top of the supporting platform 3 through the plurality of sliding rails 301, a platform is provided for chemical experimental operation by arranging the pulling plate 5, the pulling plate 5 is in sliding fit at the top of the supporting platform 3, so that the pulling plate 5 can be flexibly drawn out and sent back from the inner cavity 2, thereby improving the flexibility of the fume hood, and simultaneously, after the use, the pulling plate 5 is pushed into the inner cavity 2, to having realized fine accomodating to the chemistry experiment instrument on arm-tie 5 and the arm-tie 5, and then improved this fume chamber to the protection effect of chemistry experiment instrument.

A plurality of supporting legs 101 are installed to the bottom screw-thread fit of the cabinet body 1, and the plastic pad has all been bonded to the bottom of a plurality of supporting legs 101, and a plurality of gyro wheel 102 is installed to the bottom of the cabinet body 1.

One side of the cabinet body 1 is articulated to have two door plants 4, and two door plants 4 are located the both sides of inner chamber 2 respectively, and catching groove 401 has all been seted up to one side that inner chamber 2 was kept away from to two door plants 4, through setting up door plant 4, can avoid the dust to get into the cabinet body 1, through setting up catching groove 401, for opening and closing of door plant 4 facilitate.

The welding of the top of arm-tie 5 has handle 501, handle 501 is located the one end that arm-tie 5 is close to door plant 4, the welding of the bottom of arm-tie 5 has a plurality of slider 502, through setting up handle 501, for taking out arm-tie 5 and facilitating, thereby improve the convenience that this fume chamber used, the spout has all been seted up to the bottom of a plurality of slider 502, the cross-sectional size of spout and the big or small looks adaptation of slide rail 301 cross-section, slider 502 passes through spout sliding fit on slide rail 301, weld slider 502 in 5 bottoms of arm-tie, with arm-tie 5 sliding fit on slide rail 301 through slider 502, make arm-tie 5 gliding more stable in the front and back, avoid the in-process of pull arm-tie 5, chemical laboratory glassware on arm-tie 5 emptys, thereby improve the reliability that this fume chamber used.

The cross section of the lifting frame 6 is of a 'square' -shaped structure, four corners of the top of the lifting frame 6 are provided with slide holes 602, the slide rod 7 is in slide fit in the slide holes 602, the lifting frame 6 is in slide fit on the slide rod 7 through the slide holes 602, the slide holes 602 are arranged at the four corners of the top of the lifting frame 6, and the lifting frame is in slide fit on the slide rod 7 through the slide holes 602, so that the lifting frame 6 is more stable to move up and down, and the use reliability is further improved.

Ventilation pipe 11 is installed at the top of the cabinet body 1, and ventilation pipe 11's inside link up with inner chamber 2, through setting up ventilation pipe 11, makes this fume chamber carry out the chemistry experiment in-process, and smog and smell can be through ventilation pipe 11 upwards discharge, reduce with experimenter's contact to reduce the injury to the human body.

When in use, firstly, the supporting table 3 is arranged in the inner cavity 2, the pulling plate 5 is in sliding fit with the top of the supporting table 3, the pulling plate 5 is supported by the supporting table 3, the pulling plate 5 is positioned at a certain height, so that a user can conveniently carry out chemical experiments, a space is reserved at the bottom of the supporting table 3 by welding the supporting column at the top of the supporting table 3 to provide a space for storing chemical experimental instruments, so that the size of the inner space of the ventilation cabinet is improved, the capacity of the ventilation cabinet is increased, a platform is provided for chemical experiment operation by arranging the pulling plate 5, the pulling plate 5 can be flexibly drawn out from and sent back from the inner cavity 2 by sliding fit of the pulling plate 5 with the top of the supporting table 3, so that the flexibility of the ventilation cabinet is improved, meanwhile, after use, the pulling plate 5 is pushed into the inner cavity 2, good storage of the pulling plate 5 and the chemical experimental instruments on the pulling plate 5 is realized, further improving the protection effect of the fume hood on chemical laboratory instruments, welding a sliding block 502 at the bottom of the pulling plate 5, sliding the pulling plate 5 on the sliding rail 301 through the sliding block 502, so that the pulling plate 5 slides more stably in the front and back direction, avoiding the chemical laboratory instruments on the pulling plate 5 from toppling over in the process of pulling the pulling plate 5, improving the reliability of the fume hood in use, then driving the screw rod 801 through the motor 8, rotating the screw rod 801, enabling the nut 603 to move up and down on the screw rod 801 through rotating the screw rod 801, enabling the nut 603 to drive the lifting frame 6 to move up and down, enabling the shielding plate 601 to move up and down through moving the shielding plate 601 downwards, shielding the inner cavity 2 of the fume hood, protecting the chemical laboratory instruments and reagents placed in the inner cavity 2, and further improving the protection effect of the fume hood on the chemical laboratory instruments, the cross section of the lifting frame 6 is arranged to be of a 'square' -shaped structure, the pulling plate 5 can penetrate through the lifting frame 6, chemical experiment articles on the pulling plate 5 are prevented from being damaged by pressing when the lifting frame 6 moves downwards, the use reliability of the ventilating hood is further improved, the four corners of the top of the lifting frame 6 are provided with the sliding holes 602, the lifting frame is in sliding fit on the sliding rods 7 through the sliding holes 602, the lifting frame 6 can move up and down more stably, the use reliability is further improved, finally, the Hall element 9 is fixed on the motor 8, the PLC 10 is fixed on one side of the hood body 1, the current value on the motor 8 is detected through the Hall element 9, the current value is converted into the torque of the shielding plate 601 through the PLC, the torque value of the shielding plate 601 of the ventilating hood is set, in the downward movement process of the shielding plate 601, obstacles are encountered, and external force reaches the torque value, the PLC controller carries out the antiport with control motor 8, makes shielding plate 601 raise to realize that shielding plate 601 descends the in-process, meet under the condition that increases moment, shielding plate 601 can rise back, thereby play a guard action to the operator, improve the security that this fume chamber used.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which fall within the scope of the claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a fume chamber with adjustable chemistry experiment uses moment, includes the cabinet body (1), a supporting bench (3), motor (8), hall element (9) and PLC controller (10), its characterized in that: the improved multifunctional wardrobe is characterized in that an inner cavity (2) is formed in one side of the wardrobe body (1), the supporting table (3) is installed in the inner cavity (2), a pulling plate (5) is in sliding fit with the top of the supporting table (3), a plurality of sliding rods (7) are fixedly welded on the supporting table (3), a lifting frame (6) is in sliding fit with the sliding rods (7), a shielding plate (601) is welded at the bottom of the lifting frame (6), a nut (603) is horizontally welded on one side, far away from the shielding plate (601), of the lifting frame (6), a motor (8) is vertically installed at the top of the wardrobe body (1), a lead screw (801) is arranged at the bottom end of the motor (8), the lead screw (801) is in threaded fit with the nut (603), a Hall element (9) is fixed on the motor (8), and the PLC (10) is fixed at one end of the wardrobe body (1);

wherein, the bottom four corners welding of propping up supporting bench (3) has the support column, it fixes in inner chamber (2) through the support column to prop up supporting bench (3), the top welding of propping up supporting bench (3) has a plurality of slide rail (301), a plurality of the cross-section of slide rail (301) all is "worker" style of calligraphy structure, arm-tie (5) are at the top of propping up supporting bench (3) through a plurality of slide rail (301) sliding fit.

2. The torque adjustable fume hood for chemical laboratory according to claim 1, wherein: a plurality of supporting legs (101) are installed in the bottom end screw-thread fit of the cabinet body (1), plastic pads are all bonded to the bottom ends of the supporting legs (101), and a plurality of rollers (102) are installed at the bottom end of the cabinet body (1).

3. The torque adjustable fume hood for chemical laboratory according to claim 1, wherein: one side of the cabinet body (1) is hinged with two door plates (4), the two door plates (4) are respectively positioned at two sides of the inner cavity (2), and one side of the two door plates (4) far away from the inner cavity (2) is provided with a catching groove (401).

4. The torque adjustable fume hood for chemical laboratory according to claim 1, wherein: the welding of the top of arm-tie (5) has handle (501), and handle (501) are located one end that arm-tie (5) are close to door plant (4), and the welding of the bottom of arm-tie (5) has a plurality of slider (502), and the spout has all been seted up to the bottom of a plurality of slider (502), and the cross-section size of spout and the size looks adaptation in slide rail (301) cross-section, slider (502) pass through spout sliding fit on slide rail (301).

5. The torque adjustable fume hood for chemical laboratory according to claim 1, wherein: the cross section of the lifting frame (6) is of a square-shaped structure, slide holes (602) are formed in four corners of the top of the lifting frame (6), the slide rods (7) are in sliding fit in the slide holes (602), and the lifting frame (6) is in sliding fit on the slide rods (7) through the slide holes (602).

6. The torque adjustable fume hood for chemical laboratory according to claim 1, wherein: the top of the cabinet body (1) is provided with a ventilation pipe (11), and the inside of the ventilation pipe (11) is communicated with the inner cavity (2).

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