Portable experiment safety teaching device with isolation and purification functions

Abstract

The invention provides a portable experiment safety teaching device with isolation and purification functions. The portable experiment safety teaching device solves the problem that an existing college chemistry experiment teaching device does not have portability, environmental protection performance and safety. The device comprises a lower box body and an upper box body, a partition plate is arranged in the lower box body, an air outlet and an air return opening are formed in the partition plate, the air outlet is communicated with an outlet of a fan, the air return opening is communicated with a purification structure, a plurality of guide columns are vertically arranged in an upper cavity, guide holes with the upper ends communicated with an inner cavity of the upper box body are formed in the guide columns, and sliding seats are arranged in the guide holes in a sliding fit mode. A containing cavity used for containing reagent bottles is formed in the sliding seat, a first inlet and a first outlet are formed in the guide column, a second inlet and a second outlet are formed in the sliding seat, and when the sliding seat slides downwards to the lowest position along the guide hole, the first inlet is communicated with the second inlet, and the first outlet is communicated with the second outlet. The sliding base is provided with a blocking structure used for blocking the first inlet and the first outlet when the sliding base slides upwards. Volatile substances are removed through the fan and the purification structure, so that the environmental protection property and the safety of the experiment are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of teaching devices and relates to a portable experimental safety teaching device with isolation and purification functions. Background Art

[0002] Chemistry, materials, biology and other subjects in colleges and universities need to combine theoretical knowledge with experiments for teaching, but the current experimental teaching devices have obvious shortcomings: the front-end storage device is fixed and cannot be moved flexibly; the mid-end reagents are volatile and easy to contaminate, and lack isolation protection; the end cannot be taken and used, and frequent movement of reagents is both time-consuming and laborious, and increases the risk of leakage. In order to solve related problems, some people have proposed a method of conducting experiments in a transparent protective cover. For example, a Chinese patent discloses a chemical teaching experiment box [authorization announcement number is CN212142649U], which includes a first box body, a second box body and an operating platform. The first box body is stacked on the top of the second box body, and the operating platform is horizontally arranged inside the first box body; a through hole is provided on the side wall of the first box body for extending into the first box body and performing experiments on the operating platform. It can not only show the chemical experiment process to students, but also protect the safety of teachers and students.

[0003] The above-mentioned test box places instruments, tools and medicines on the partition of the second box. Since the second box is in a closed state, some volatile medicines / reagents emit harmful components to the human body and remain in the second box. During the experiment, the second box needs to be opened to transfer the medicines / tools, and the emitted harmful components will enter the human body, which is unsafe. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of insufficient portability, environmental protection and safety in the prior art, and to propose a portable experimental safety teaching device with isolation and purification functions.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A portable experimental safety teaching device with isolation and purification functions comprises a lower box body and an upper box body arranged on the lower box body, the lower box body being provided with a partition for dividing the inner cavity of the lower box body into an upper cavity and a lower cavity, the partition being provided with an air outlet and a return air outlet, the air outlet being connected with the outlet of a fan arranged in the lower cavity, the return air outlet being connected with a purification structure arranged in the lower cavity, the inlet of the fan and the outlet of the purification structure being both connected with the lower cavity, a plurality of guide columns being vertically arranged in the upper cavity, the guide columns being provided with guide holes whose upper ends are connected with the inner cavity of the upper box body, a slide seat being slidably fitted in the guide holes, a placement cavity for accommodating a reagent bottle being provided in the slide seat, a first inlet and a first outlet being provided on the guide columns, a second inlet and a second outlet being provided on the slide seat, when the slide seat slides downward along the guide hole to the lowest point, the first inlet is connected with the second inlet and the first outlet is connected with the second outlet, and the slide seat is provided with a blocking structure for blocking the first inlet and the first outlet when the slide seat slides upward.

[0007] The first inlet and the first outlet are arranged on the guide column relatively, and the second inlet and the second outlet are arranged on the slide relatively. The cross-sectional shape of the guide hole is the same as that of the slide, and the two are slidably matched. Under the action of external force and its own gravity, the slide can slide up and down in the guide hole. When the slide slides upward and the upper end of the slide extends into the inner cavity of the upper box, the reagent bottle located in the slide can be taken out to the inner cavity of the upper box through the opening opened on the slide. At the same time, the blocking structure blocks the first inlet and the first outlet to prevent high-concentration harmful substances in the upper cavity from entering the inner cavity of the upper box. Take the reagent bottle in the upper box to the top of the upper box for experiment.

[0008] After the experiment is completed, the reagent bottle is placed in the placement cavity of the slide, and then pressed downward or the slide is made to slide downward to the lowest point under the action of gravity. The blocking structure disengages from the blocking of the first inlet and the first outlet, and the first inlet is connected with the second inlet and the first outlet is connected with the second outlet. The airflow generated by the fan when working enters the placement cavity through the first inlet and the second inlet, takes away the volatile substances, and then enters the upper cavity through the first outlet and the second outlet, and enters the purification structure through the return air port, and the purified gas returns to the lower cavity.

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

[0010] In the above-mentioned portable experimental safety teaching device with isolation and purification functions, the slide seat includes a left vertical plate, a right vertical plate, a rear vertical plate, a top plate and a bottom plate, the front side of the slide seat is open, the second inlet is arranged on the left vertical plate, and the second outlet is arranged on the right vertical plate. The five plates are used to form a rectangular box body, and the opening is arranged on the front side of the slide seat, which is convenient for putting in and taking out the reagent bottle. The second inlet and the second outlet are arranged opposite to each other, which is convenient for quickly blowing away the volatile substances in the placement chamber.

[0011] In the above-mentioned 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 blocking structure includes a cylinder connected to the lower end of the slide, and 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 downward 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 above-mentioned portable experimental safety teaching device with isolation and purification functions, a lifting member for pushing the slide seat upward is provided in the cylinder. The lifting member is a cylinder / electric push rod fixed in the lower cavity and the telescopic end is connected to the bottom plate of the slide seat. When the piston rod / electric push rod of the cylinder moves upward to the maximum distance, the opening of the slide seat is completely connected to the inner cavity of the upper box body, which is convenient for taking out and putting in the reagent bottle. When the piston rod / electric push rod of the cylinder moves downward, it can drive the slide seat to move downward.

[0013] In the above-mentioned portable experimental safety teaching device with isolation and purification functions, the guide hole is provided with an annular groove located above the first inlet, and a sealing ring is provided in the annular groove, thereby improving the sealing performance between the slide seat and the guide column.

[0014] In the above-mentioned portable experimental safety teaching device with isolation and purification functions, the air outlet is connected with an air duct, and the air duct has a plurality of air duct branches arranged one by one corresponding to the first inlet, and the air duct branches are connected to the first inlet corresponding thereto. The wind of the fan is directly introduced into the first inlet through the air duct, thereby improving efficiency.

[0015] In the above-mentioned portable experimental safety teaching device with isolation and purification functions, the purification structure includes a purification box arranged in the lower cavity and a solvent arranged in the purification box, a horizontal plate is arranged in the purification box, a first channel for connecting with the return air port is arranged in the middle of the horizontal plate, and a second channel is arranged at the edge of the horizontal plate.

[0016] The liquid level of the solvent is slightly lower than the lower surface of the horizontal plate, so that the liquid level of the container and the horizontal plate are in a gap fit. The solvent that can dissolve the gaseous substances volatilized from the reagent in the reagent bottle is loaded into the purification box, and the harmful gaseous substances enter the purification box through the first channel, contact with the solvent under the guidance of the horizontal plate, and can be effectively absorbed by the solvent, and then the purified air enters the lower cavity through the second channel.

[0017] In the above-mentioned 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 arranged 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 arranged on the middle plate near the first channel, and a fourth channel is arranged on the edge of the upper plate.

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

[0019] In the above-mentioned portable experimental safety teaching device with isolation and purification functions, the side of the lower cavity is provided with an opening for placing the purification box. The opening is convenient for placing and removing the purification box, and it is convenient to replace or add adsorbents and solvents at any time, which is easy to operate.

[0020] In the above-mentioned portable experimental safety teaching device with isolation and purification functions, the bottom of the lower box is provided with running wheels for easy movement. The front side of the upper box is an operation port, which is convenient for moving the reagent bottle to the top of the upper box for experimental operation. In order to further improve safety, the operation port is closed, and the reagent reaction experiment is carried out in the upper box. The upper box is made of transparent material, and an operation hole is provided on the side of the upper box, and an operating glove is sealed at the operation hole.

[0021] Compared with the prior art, the present invention has the following advantages: the bottom of the lower box is equipped with moving wheels, 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 protection of the experiment; the reagents can be taken and used at the end of the operation, effectively reducing the risk of reagent leakage and improving the safety of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 It is a longitudinal sectional view of the portable experimental safety teaching device in the first embodiment.

[0024] Figure 3 It is a transverse cross-sectional view of the portable experimental safety teaching device in the first embodiment.

[0025] Figure 4 It is a longitudinal sectional view of the portable experimental safety teaching device passing through the slide seat.

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

[0027] In the figure, 1, lower box; 2, upper box; 3, partition; 4, return air outlet; 5, fan; 6, purification structure; 60, fourth channel; 61, purification box; 62, solvent; 63, horizontal plate; 64, first channel; 65, second channel; 66, annular plate; 67, middle plate; 68, upper 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 guide branch pipe; 15, walking wheel. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] Embodiment 1

[0030] like Figure 1 The portable experimental safety teaching device with isolation and purification functions shown in Figure 4 comprises a lower box body 1 and an upper box body 2 arranged on the lower box body 1. A partition 3 is arranged in the lower box body 1 for dividing the inner cavity of the lower box body 1 into an upper cavity and a lower cavity. An air outlet and a return air outlet 4 are arranged on the partition 3. The air outlet is connected to the outlet of a fan 5 arranged in the lower cavity. The fan 5 is driven by a motor, or the rotating shaft of the fan 5 extends from the front side of the lower box body 1, and a crank is arranged on the extended part, and the fan 5 is driven manually to work. The return air outlet 4 is connected to a purification structure 6 arranged in the lower cavity, and the inlet of the fan 5 and the outlet of the purification structure 6 are both connected to the lower cavity.

[0031] In this embodiment, an opening (not shown) for placing the purification box 61 is provided on the right side of the lower cavity. The opening is convenient for placing and removing the purification box 61, and convenient for replacing or adding the adsorbent and solvent 62 at any time, which is easy to operate.

[0032] like Figure 2As shown in Figure 4, four guide columns 7 are vertically arranged 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 box body 2. A slide 8 is slidably fitted in the guide holes. The slide 8 includes a left vertical plate, a right vertical plate, a rear vertical plate, a top plate and a bottom plate. The front side of the slide 8 is open. The slide 8 is provided with a placement cavity for accommodating reagent bottles. The guide columns 7 are provided with a first inlet 9 and a first outlet 10. The left vertical plate of the slide 8 is provided with a second inlet 11. The right vertical plate of the slide 8 is provided with a second outlet 12. When the slide 8 slides down to the lowest point along the guide holes, the first inlet 9 is connected to the second inlet 11 and the first outlet 10 is connected to 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 box body 2. In order to avoid leakage, the slide 8 is provided with a blocking structure for blocking the first inlet 9 and the first outlet 10 when the slide 8 slides upward.

[0033] The first inlet 9 and the first outlet 10 are arranged on the guide column 7, and the second inlet 11 and the second outlet 12 are arranged on the slide 8. The cross-sectional shape of the guide hole is the same as that of the slide 8, and the two are slidably matched. In order to facilitate the upward lifting of the slide 8, a pull ring (not shown in the figure) is arranged on the top plate. Under the action of external force, the slide 8 can move up along the guide hole. When the slide 8 slides upward and the upper end of the slide 8 extends into the inner cavity of the upper box 2, the reagent bottle located in the slide 8 can be taken out to the inner cavity of the upper box 2 through the opening provided on the slide 8. At the same time, the blocking structure blocks the first inlet 9 and the first outlet 10 to prevent high-concentration harmful substances in the upper cavity from entering the inner cavity of the upper box 2.

[0034] In this embodiment, the front side of the upper box body 2 is an operation port, which is convenient for moving the reagent bottle to the top of the upper box body 2 for experimental operation. The bottom of the lower box body 1 is provided with running wheels 15 for easy movement.

[0035] During the experiment, the slide seat 8 is pulled upward until the reagent bottle in the placement cavity can be completely taken out, the reagent bottle in the placement cavity is taken out into the upper box body 2, and then the reagent bottle is taken out from the upper box body 2 and moved to the top of the upper box body 2 for chemical experiments. The reagents can be taken and used in the safety teaching device, which effectively reduces the risk of reagent leakage and improves the safety of the experiment.

[0036] After the experiment is completed, the reagent bottle is placed in the placement cavity of the slide 8, and then the slide 8 is pressed downward or slid downward to the lowest point under the action of gravity, and the blocking structure is disengaged from the blocking of the first inlet 9 and the first outlet 10. The first inlet 9 is connected with the second inlet 11 and the first outlet 10 is connected with the second outlet 12. The airflow generated by the fan 5 when working enters the placement cavity through the first inlet 9 and the second inlet 11, takes away the volatile substances, and then 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, and the purified gas 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 the impact on the human body during the experiment, thereby effectively improving the safety of the experiment.

[0038] like Figure 4 As shown, the lower end of the guide hole is connected to the lower cavity, and 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 downward 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] In order to improve the sealing performance, an annular groove located above the first inlet 9 is provided inside the guide hole, and a sealing ring is provided in the annular groove.

[0040] like Figure 2 As shown in FIG. 4 , an air guide duct is connected to the air outlet, and the air guide duct has a plurality of air guide branch ducts 14 arranged one-to-one corresponding to the first inlet 9. The air guide branch ducts 14 are connected to the corresponding first inlet 9, thereby improving the air guiding efficiency.

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

[0042] The liquid level of the solvent 62 is slightly lower than the lower surface of the horizontal plate 63, so that the liquid level of the container is in clearance with the horizontal plate 63. The solvent 62 that can dissolve the gaseous substances volatilized from the reagent in the reagent bottle is loaded into the purification box 61, and the harmful gaseous substances enter the purification box 61 through the first channel 64, and contact with the solvent 62 under the guidance of the horizontal plate 63, and can be effectively absorbed by the solvent 62, and then the purified air enters the lower cavity through the second channel 65.

[0043] like Figure 5 As shown, the edge of the horizontal plate 63 has an upwardly extending annular plate 66, and a middle plate 67 and an upper plate 68 parallel to the horizontal plate 63 are provided between the annular plate 66 and the first channel 64. 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, passes between the horizontal plate 63 and the liquid 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 is finally discharged from the fourth channel 60. In the whole process, the harmful gaseous substances in the air can be completely purified.

[0045] Embodiment 2

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

[0047] Embodiment 3

[0048] The structural principle of this embodiment is basically the same as that of the first embodiment, except that a lifting member for pushing the slide 8 upward is provided in the cylinder 13. The lifting member is a cylinder / electric push rod fixed in the lower cavity and connected to the bottom plate of the slide 8 at the telescopic end. When the piston rod / electric push rod of the cylinder moves upward to the maximum distance, the opening of the slide 8 is completely connected to the inner cavity of the upper box 2, which is convenient for taking out and putting in the reagent bottle. When the piston rod / electric push rod of the cylinder moves downward, it can drive the slide 8 to move downward.

[0049] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A portable experimental safety teaching device with isolation and purification functions, comprising a lower box (1) and an upper box (2) arranged on the lower box (1), characterized in that: The lower box (1) is provided with a partition (3) for dividing the inner cavity of the lower box (1) into an upper cavity and a lower cavity, and the partition (3) is provided with an air outlet and an air return port (4), the air outlet is communicated with the outlet of a fan (5) arranged in the lower cavity, the air return port (4) is communicated with a purification structure (6) arranged in the lower cavity, the inlet of the fan (5) and the outlet of the purification structure (6) are both communicated with the lower cavity, and a plurality of guide columns (7) are vertically arranged in the upper cavity, and the guide columns (7) are provided with guide holes whose upper ends are communicated with the inner cavity of the upper box (2), and the guide holes are provided with guide holes. The slide (8) is slidably matched, and a placement cavity for accommodating a reagent bottle is provided in the slide (8). A first inlet (9) and a first outlet (10) are provided on the guide column (7), and a second inlet (11) and a second outlet (12) are provided on the slide (8). When the slide (8) slides downward along the guide hole to the lowest point, the first inlet (9) is connected to the second inlet (11) and the first outlet (10) is connected to the second outlet (12). The slide (8) is provided with a blocking structure for blocking the first inlet (9) and the first outlet (10) when the slide (8) slides upward.

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

3. The portable experimental safety teaching device with isolation and purification functions according to claim 1 is characterized in that: The lower end of the guide hole is connected to the lower cavity, and the blocking structure includes a cylinder (13) connected to the lower end of the slide seat (8). The cross-sectional shape of the cylinder (13) is the same as the cross-sectional shape of the slide seat (8) and is equal in size. When the slide seat (8) slides downward 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 1 is characterized in that: A lifting member for pushing the slide seat (8) upwards is arranged in the cylinder (13).

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

6. The portable experimental safety teaching device with isolation and purification functions according to claim 1 is characterized in that: The air outlet is connected to an air guide pipe, the air guide pipe has a plurality of air guide branch pipes (14) arranged in one-to-one correspondence with the first inlets (9), and the air guide branch pipes (14) are connected to the corresponding first inlets (9).

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

8. The portable experimental safety teaching device with isolation and purification functions according to claim 7 is characterized in that: The edge of the horizontal plate (63) has an annular plate (66) extending upward, and a middle plate (67) and an upper plate (68) parallel to the horizontal plate (63) are provided between the annular plate (66) and the first channel (64). 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 is characterized in that: The side of the lower cavity is provided with an opening for placing the purification box (61).

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

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