Portable experimental safety teaching device with isolation and purification functions

Abstract

The application provides a portable experimental safety teaching device with isolation and purification functions, which solves the problems of the existing chemical experimental teaching device in colleges and universities, such as lack of portability, environmental protection and safety. The device comprises a lower box body and an upper box body, a partition is arranged in the lower box body, an air outlet and an air return are arranged on the partition, the air outlet is communicated with the outlet of a fan, the air return is communicated with a purification structure, a plurality of guide columns are vertically arranged in the upper cavity, guide holes are arranged in the guide columns and communicated with the inner cavity of the upper box body, sliding seats are slidably arranged in the guide holes, placing cavities for accommodating reagent bottles are arranged in the sliding seats, a first inlet and a first outlet are arranged on the guide columns, a second inlet and a second outlet are arranged on the sliding seat, the first inlet is communicated with the second inlet and the first outlet is communicated with the second outlet when the sliding seat slides downward to the lowest position, and a plugging structure is arranged on the sliding seat and used for plugging the first inlet and the first outlet when the sliding seat slides upward. The fan and the purification structure remove volatile substances, and effectively improve the environmental protection and safety of the experiment.

Description

Technical Field

[0001] This invention belongs to the field of teaching device technology and relates to a portable experimental safety teaching device with isolation and purification functions. Background Technology

[0002] In higher education, disciplines such as chemistry, materials science, and biology require teaching that combines theoretical knowledge with experiments. However, current experimental teaching devices have significant shortcomings: the front-end storage device is fixed and cannot be moved flexibly; the middle-end reagents are volatile and easily contaminated, lacking isolation and protection; and the end-end reagents cannot be easily retrieved and used, and frequent movement is time-consuming, laborious, and increases the risk of leakage. To address these issues, some have proposed methods for conducting experiments within transparent protective enclosures. For example, Chinese patent discloses a chemical teaching experimental box [authorization announcement number CN212142649U], which includes a first box, a second box, and an operating platform. The first box is stacked on top of the second box, and the operating platform is horizontally positioned inside the first box. The side wall of the first box has through holes for inserting into the first box and conducting experiments on the operating platform. This allows for the demonstration of chemical experimental processes to students while also protecting the safety of teachers and students.

[0003] The aforementioned test chamber places instruments, tools, and reagents on the partition of the second chamber. Since the second chamber is in a closed state, some volatile reagents / reagents release harmful components that remain inside the second chamber. During the experiment, the second chamber needs to be opened to transfer the reagents / tools, and the released harmful components will enter the human body, resulting in poor safety. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies in terms of portability, environmental friendliness, and safety by proposing a portable experimental safety teaching device with isolation and purification functions.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A portable experimental safety teaching device with isolation and purification functions includes a lower housing and an upper housing mounted on the lower housing. The lower housing has a partition dividing its interior into an upper and lower housing. The partition has an air outlet and an air return outlet. The air outlet connects to the outlet of a fan located in the lower housing, and the air return outlet connects to a purification structure located in the lower housing. The inlet of the fan and the outlet of the purification structure both connect to the lower housing. Several guide pillars are erected in the upper housing. Each guide pillar has a guide hole whose upper end connects to the interior of the upper housing. A slide block slidably fits within the guide hole. The slide block has a placement cavity for accommodating reagent bottles. The guide pillars have a first inlet and a first outlet, and the slide block has a second inlet and a second outlet. When the slide block slides downwards along the guide hole to its lowest point, the first inlet connects to the second inlet, and the first outlet connects to the second outlet. The slide block has a sealing structure that blocks the first inlet and the first outlet when the slide block slides upwards.

[0007] The first inlet and the first outlet are positioned opposite each other on the guide post, and the second inlet and the second outlet are positioned opposite each other on the slide. The cross-sectional shape of the guide hole is the same as that of the slide, and the two are in a sliding fit. Under the action of external force and its own gravity, the slide can slide up and down within the guide hole. When the slide slides upward and its upper end extends into the inner cavity of the upper chamber, the reagent bottle located inside the slide can be removed into the inner cavity of the upper chamber through the opening in the slide. At the same time, the sealing structure seals the first inlet and the first outlet, preventing high concentrations of harmful substances in the upper chamber from entering the inner cavity of the upper chamber. The reagent bottle in the upper chamber is then removed to the top of the upper chamber for experimentation.

[0008] After the experiment is completed, place the reagent bottle into the placement cavity of the slide, then press down or slide the slide down to the lowest point under the action of gravity. The sealing structure is released from the blockage of the first inlet and the first outlet, and the first inlet and the second outlet are connected. When the fan is working, the airflow generated enters the placement cavity through the first inlet and the second inlet, carrying away the volatile substances. Then it enters the upper cavity through the first outlet and the second outlet, and enters the purification structure through the return air port. The purified gas then returns to the lower cavity.

[0009] Before the experiment, volatile substances in the placement chamber can be removed by a fan and purification structure to avoid affecting the human body during the experiment, thus effectively improving the safety of the experiment.

[0010] In the aforementioned portable experimental safety teaching device with isolation and purification functions, the slide includes a left upright plate, a right upright plate, a rear upright plate, a top plate, and a bottom plate. The front of the slide is open, the second inlet is located on the left upright plate, and the second outlet is located on the right upright plate. The five plates form a rectangular box, and the open end on the front of the slide facilitates the insertion and removal of reagent bottles. The opposite arrangement of the second inlet and the second outlet allows for the rapid removal of volatile substances from the placement chamber.

[0011] In the aforementioned portable experimental safety teaching device with isolation and purification functions, the lower end of the guide hole is connected to the lower cavity, and the sealing structure includes a cylinder connected to the lower end of the slide. The shape of the cross-section of the cylinder is the same as the shape of the cross-section of the slide and the size is equal. When the slide slides down along the guide hole to the lowest point, the lower end of the cylinder abuts against the inner bottom of the lower cavity.

[0012] In the aforementioned portable experimental safety teaching device with isolation and purification functions, the cylinder is equipped with a lifting component for pushing the slide upwards. The lifting component is a cylinder / electric actuator, etc., fixed in the lower cavity and with its telescopic end connected to the base plate of the slide. When the piston rod of the cylinder / electric actuator moves upwards to its maximum distance, the opening of the slide is fully connected to the inner cavity of the upper housing, facilitating the removal and placement of reagent bottles. When the piston rod of the cylinder / electric actuator moves downwards, it can drive the slide downwards.

[0013] In the aforementioned portable experimental safety teaching device with isolation and purification functions, the interior of the guide hole is provided with an annular groove located above the first inlet, and a sealing ring is provided inside the annular groove. This improves the sealing performance between the slide and the guide column.

[0014] In the aforementioned portable experimental safety teaching device with isolation and purification functions, an air duct is connected to the air outlet. The air duct has multiple branch air ducts, each corresponding to a first inlet, and these branch air ducts are connected to their respective first inlets. By directly introducing air from the fan into the first inlet through the air duct, efficiency is improved.

[0015] In the aforementioned portable experimental safety teaching device with isolation and purification functions, the purification structure includes a purification chamber located in the lower cavity and a solvent located in the purification chamber. A horizontal plate is provided inside the purification chamber. A first channel for communicating with the return air vent is provided in the middle of the horizontal plate, and a second channel is provided at the edge of the horizontal plate.

[0016] The solvent level is slightly lower than the bottom surface of the level plate, creating a gap fit between the liquid level in the container and the level plate. A solvent capable of dissolving gaseous substances volatilized from the reagent bottle is placed inside the purification chamber. Harmful gaseous substances enter the purification chamber through the first channel, where they come into contact with the solvent under the guidance of the level plate and are effectively absorbed. The purified air then enters the lower chamber through the second channel.

[0017] In the aforementioned portable experimental safety teaching device with isolation and purification functions, the edge of the horizontal plate has an upwardly extending annular plate, and a middle plate and an upper plate parallel to the horizontal plate are provided between the annular plate and the first channel. A first purification chamber is formed between the horizontal plate and the middle plate, and the first purification chamber is filled with a first adsorbent. A second purification chamber is formed between the middle plate and the upper plate, and the second purification chamber is filled with a second adsorbent. A third channel is provided near the first channel on the middle plate, and a fourth channel is provided at the edge of the upper plate.

[0018] The air entering through the first channel carries harmful gaseous substances. It passes between the horizontal plate and the solvent surface, then enters the first purification chamber through the second channel, then enters the second purification chamber through the third channel, and finally exits through the fourth channel. In the whole process, harmful gaseous substances in the air can be completely purified.

[0019] In the aforementioned portable experimental safety teaching device with isolation and purification functions, the side of the lower cavity is provided with an opening for inserting the purification chamber. This opening facilitates the insertion and removal of the purification chamber, allows for easy replacement or addition of adsorbent and solvent, and makes operation convenient.

[0020] In the aforementioned portable experimental safety teaching device with isolation and purification functions, the bottom of the lower chamber is equipped with wheels for easy movement. The front of the upper chamber has an operating port, facilitating the movement of reagent bottles to the top for experimental operations. To further enhance safety, the operating port is sealed, and reagent reaction experiments are conducted inside the upper chamber. The upper chamber is made of transparent material, and an operating hole is located on its side, sealed with operating gloves.

[0021] Compared with the prior art, the present invention has the following advantages: the bottom of the lower box is equipped with casters, which enhances the portability and flexibility of the device; the built-in fan and purification system can effectively remove volatile substances in the placement chamber, ensuring that the experimental process is harmless to the human body and enhancing the environmental friendliness of the experiment; it can realize the immediate access and use of reagents at the end of the operation, effectively reducing the risk of reagent leakage and improving the safety of the experiment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the portable experimental safety teaching device in Example 1.

[0023] Figure 2 This is a longitudinal sectional view of the portable experimental safety teaching device in Embodiment 1.

[0024] Figure 3 This is a cross-sectional view of the portable experimental safety teaching device in Embodiment 1.

[0025] Figure 4 This is a longitudinal sectional view of the slide of the portable experimental safety teaching device.

[0026] Figure 5 This is a cross-sectional view of the purification structure provided by the present invention.

[0027] In the diagram: 1. Lower housing; 2. Upper housing; 3. Partition; 4. Return air vent; 5. Fan; 6. Purification structure; 60. Fourth channel; 61. Purification chamber; 62. Solvent; 63. Horizontal plate; 64. First channel; 65. Second channel; 66. Annular plate; 67. Middle layer plate; 68. Upper layer plate; 69. Third channel; 7. Guide column; 8. Slide seat; 9. First inlet; 10. First outlet; 11. Second inlet; 12. Second outlet; 13. Cylinder; 14. Air duct; 15. Wheels. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] Example 1

[0030] like Figure 1 The portable experimental safety teaching device with isolation and purification functions shown in Figure 4 includes a lower housing 1 and an upper housing 2 located on the lower housing 1. The lower housing 1 has a partition 3 that divides its interior into an upper and lower cavity. The partition 3 has an air outlet and an air return outlet 4. The air outlet is connected to the outlet of a fan 5 located in the lower cavity. The fan 5 is driven by a motor, or the fan 5's shaft extends from the front of the lower housing 1, with a crank handle on the extended portion for manual operation. The air return outlet 4 is connected to a purification structure 6 located in the lower cavity. Both the inlet of the fan 5 and the outlet of the purification structure 6 are connected to the lower cavity.

[0031] In this embodiment, an opening (not shown in the figure) for inserting the purification chamber 61 is provided on the right side of the lower cavity. The opening facilitates the insertion and removal of the purification chamber 61, and allows for easy replacement or addition of the adsorbent and solvent 62, making operation convenient.

[0032] like Figure 2As shown in Figure 4, four guide pillars 7 are erected inside the upper cavity. Each guide pillar 7 has a guide hole whose upper end communicates with the inner cavity of the upper housing 2. A slide block 8 is slidably fitted within the guide hole. The slide block 8 includes a left upright plate, a right upright plate, a rear upright plate, a top plate, and a bottom plate. The front of the slide block 8 is open. The slide block 8 has a placement cavity for accommodating reagent bottles. The guide pillars 7 have a first inlet 9 and a first outlet 10. The left upright plate of the slide block 8 has a second inlet 11, and the right upright plate has a second outlet 12. When the slide block 8 slides downwards along the guide hole to its lowest point, the first inlet 9 connects with the second inlet 11, and the first outlet 10 connects with the second outlet 12. At this time, the upper surface of the top plate is flush with the inner bottom surface of the inner cavity of the upper housing 2. To prevent leakage, the slide block 8 has a sealing structure that blocks the first inlet 9 and the first outlet 10 when the slide block 8 slides upwards.

[0033] The first inlet 9 and the first outlet 10 are positioned opposite each other on the guide post 7, and the second inlet 11 and the second outlet 12 are positioned opposite each other on the slide block 8. The cross-sectional shape of the guide hole is the same as that of the slide block 8, and the two are in sliding fit. To facilitate lifting the slide block 8 upward, a pull ring (not shown in the figure) is provided on the top plate. Under the action of external force, the slide block 8 can move upward along the guide hole. When the slide block 8 slides upward and the upper end of the slide block 8 extends into the inner cavity of the upper box 2, the reagent bottle located in the slide block 8 can be taken out into the inner cavity of the upper box 2 through the opening opened on the slide block 8. At the same time, the sealing structure seals the first inlet 9 and the first outlet 10 to prevent high concentrations of harmful substances in the upper cavity from entering the inner cavity of the upper box 2.

[0034] In this embodiment, the front of the upper box 2 is an operating port, which facilitates moving the reagent bottle to the top of the upper box 2 for experimental operations. The bottom of the lower box 1 is equipped with casters 15 for easy movement.

[0035] During the experiment, the slide block 8 is lifted upwards until the reagent bottle located in the placement chamber can be completely removed. The reagent bottle in the placement chamber is then taken out into the upper box 2, and then taken out from the upper box 2 and moved to the top of the upper box 2 for chemical experiments. This allows for the immediate access and use of reagents within the safe teaching device, effectively reducing the risk of reagent leakage and improving the safety of the experiment.

[0036] After the experiment is completed, the reagent bottle is placed in the placement cavity of the slide 8. Then, the slide 8 is pressed down or slid down to the lowest point under the action of gravity. The sealing structure is released from the blockage of the first inlet 9 and the first outlet 10. The first inlet 9 is connected to the second inlet 11 and the first outlet 10 is connected to the second outlet 12. The airflow generated by the fan 5 when it is working enters the placement cavity through the first inlet 9 and the second inlet 11, carrying away the volatile substances. Then, it enters the upper cavity through the first outlet 10 and the second outlet 12, and enters the purification structure 6 through the return air port 4. The purified gas then returns to the lower cavity.

[0037] Before the experiment, the volatile substances in the placement chamber can be removed by the fan 5 and the purification structure 6 to avoid affecting the human body during the experiment and effectively improve the safety of the experiment.

[0038] like Figure 4 As shown, the lower end of the guide hole is connected to the lower cavity. The sealing structure includes a cylinder 13 connected to the lower end of the slide 8. The shape of the cross section of the cylinder 13 is the same as the shape of the cross section of the slide 8 and the size is equal. When the slide 8 slides down along the guide hole to the lowest point, the lower end of the cylinder 13 abuts against the inner bottom of the lower cavity.

[0039] To improve sealing, an annular groove is provided inside the guide hole above the first inlet 9, and a sealing ring is provided inside the annular groove.

[0040] like Figure 2 As shown in Figure 4, an air duct is connected to the air outlet. The air duct has multiple air duct branches 14 that are configured one-to-one with the first inlet 9. The air duct branches 14 are connected to the corresponding first inlet 9, which improves the air guiding efficiency.

[0041] like Figure 5 As shown, the purification structure 6 includes a purification chamber 61 disposed in the lower cavity and a solvent 62 disposed in the purification chamber 61. A horizontal plate 63 is provided inside the purification chamber 61. A first channel 64 for communicating with the return air vent 4 is provided in the middle of the horizontal plate 63, and a second channel 65 is provided at the edge of the horizontal plate 63.

[0042] The liquid level of solvent 62 is slightly lower than the lower surface of the horizontal plate 63, creating a clearance fit between the liquid level in the container and the horizontal plate 63. Solvent 62, capable of dissolving gaseous substances volatilized from the reagent bottle, is placed into the purification chamber 61. Harmful gaseous substances enter the purification chamber 61 through the first channel 64 and, guided by the horizontal plate 63, come into contact with the solvent 62, where they are effectively absorbed. The purified air then enters the lower chamber through the second channel 65.

[0043] like Figure 5 As shown, the horizontal plate 63 has an upwardly extending annular plate 66 at its edge. Between the annular plate 66 and the first channel 64, there is a middle plate 67 and an upper plate 68 parallel to the horizontal plate 63. A first purification chamber is formed between the horizontal plate 63 and the middle plate 67, and the first purification chamber is filled with a first adsorbent. A second purification chamber is formed between the middle plate 67 and the upper plate 68, and the second purification chamber is filled with a second adsorbent. A third channel 69 is provided on the middle plate 67 near the first channel 64, and a fourth channel 60 is provided on the edge of the upper plate 68.

[0044] The air entering through the first channel 64 carries harmful gaseous substances. It passes between the horizontal plate 63 and the surface of the solvent 62, then enters the first purification chamber through the second channel 65, then enters the second purification chamber through the third channel 69, and finally exits through the fourth channel 60. In the whole process, the harmful gaseous substances in the air can be completely purified.

[0045] Example 2

[0046] The structural principle of this embodiment is basically the same as that of embodiment one. The difference is that, in order to further improve safety, the operating port is sealed and the reagent reaction experiment is carried out in the upper box 2. The upper box 2 is made of transparent material and has an operating hole on the side. An operating glove is sealed at the operating hole.

[0047] Example 3

[0048] The structural principle of this embodiment is basically the same as that of Embodiment 1. The difference lies in the fact that a lifting component for pushing the slide 8 upward is provided inside the cylinder 13. The lifting component is a cylinder / electric push rod, etc., fixed in the lower cavity and with its telescopic end connected to the bottom plate of the slide 8. When the piston rod of the cylinder / electric push rod moves upward to its maximum distance, the opening of the slide 8 is fully connected to the inner cavity of the upper box 2, facilitating the removal and placement of reagent bottles. When the piston rod of the cylinder / electric push rod moves downward, it can drive the slide 8 downward.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A portable experimental safety teaching device with isolation and purification functions, comprising a lower housing (1) and an upper housing (2) disposed on the lower housing (1), characterized in that, The lower housing (1) is provided with a partition (3) for dividing the inner cavity of the lower housing (1) into an upper cavity and a lower cavity. The partition (3) is provided with an air outlet and an air return outlet (4). The air outlet is connected to the outlet of a fan (5) located in the lower cavity. The air return outlet (4) is connected to a purification structure (6) located in the lower cavity. The inlet of the fan (5) and the outlet of the purification structure (6) are both connected to the lower cavity. Several guide columns (7) are erected in the upper cavity. The guide columns (7) are provided with guide holes whose upper ends are connected to the inner cavity of the upper housing (2). The slide is fitted with a slide seat (8), which has a cavity for accommodating reagent bottles. The guide post (7) has a first inlet (9) and a first outlet (10). The slide seat (8) has a second inlet (11) and a second outlet (12). When the slide seat (8) slides down along the guide hole to the lowest point, the first inlet (9) and the second inlet (11) are connected and the first outlet (10) and the second outlet (12) are connected. The slide seat (8) has a sealing structure for blocking the first inlet (9) and the first outlet (10) when the slide seat (8) slides up.

2. The portable experimental safety teaching device with isolation and purification functions according to claim 1, characterized in that, The slide (8) includes a left upright plate, a right upright plate, a rear upright plate, a top plate and a bottom plate. The front side of the slide (8) is open. The second inlet (11) is located on the left upright plate and the second outlet (12) is located on the right upright plate.

3. The portable experimental safety teaching device with isolation and purification functions according to claim 1, characterized in that, The lower end of the guide hole is connected to the lower cavity. The sealing structure includes a cylinder (13) connected to the lower end of the slide (8). The shape of the cross section of the cylinder (13) is the same as the shape of the cross section of the slide (8) and the size is equal. When the slide (8) slides down along the guide hole to the lowest point, the lower end of the cylinder (13) abuts against the inner bottom of the lower cavity.

4. The portable experimental safety teaching device with isolation and purification functions according to claim 3, characterized in that, The cylinder (13) is provided with a lifting member for pushing the slide (8) upward.

5. The portable experimental safety teaching device with isolation and purification functions according to claim 1, characterized in that, The guide hole has an annular groove located above the first inlet (9) inside, and a sealing ring is provided in the annular groove.

6. The portable experimental safety teaching device with isolation and purification functions according to claim 1, characterized in that, The air outlet is connected to an air guide pipe, which has multiple air guide branches (14) that correspond one-to-one with the first inlet (9). The air guide branches (14) are connected to the corresponding first inlet (9).

7. The portable experimental safety teaching device with isolation and purification functions according to claim 1, characterized in that, The purification structure (6) includes a purification box (61) located in the lower cavity and a solvent (62) located in the purification box (61). A horizontal plate (63) is provided inside the purification box (61). A first channel (64) for communicating with the return air vent (4) is provided in the middle of the horizontal plate (63), and a second channel (65) is provided at the edge of the horizontal plate (63).

8. The portable experimental safety teaching device with isolation and purification functions according to claim 7, characterized in that, The horizontal plate (63) has an upwardly extending annular plate (66) at its edge. Between the annular plate (66) and the first channel (64), there is a middle plate (67) and an upper plate (68) parallel to the horizontal plate (63). A first purification chamber is formed between the horizontal plate (63) and the middle plate (67), and the first purification chamber is filled with a first adsorbent. A second purification chamber is formed between the middle plate (67) and the upper plate (68), and the second purification chamber is filled with a second adsorbent. A third channel (69) is provided on the middle plate (67) near the first channel (64), and a fourth channel (60) is provided on the edge of the upper plate (68).

9. The portable experimental safety teaching device with isolation and purification functions according to claim 1, characterized in that, The lower cavity has an opening on its side for inserting the purification box (61).

10. The portable experimental safety teaching device with isolation and purification functions according to claim 1, characterized in that, The bottom of the lower housing (1) is provided with wheels (15).

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