Chemical experiment teaching aid

Abstract

The utility model discloses a chemical experiment teaching aid, which relates to the technical field of chemical experiment teaching aids and comprises a distillation device, a pressurizing pipe is fixedly mounted on the side wall of a distillation head of the distillation device, a first one-way valve is fixedly mounted in the pressurizing pipe, a piston plate is movably mounted in the pressurizing pipe, and a second one-way valve is fixedly mounted in the piston plate. A driving assembly is arranged on the pressurizing pipe and used for driving the piston plate to move. According to the distillation device disclosed by the utility model, the pressurization mechanism is arranged, and the interior of the distillation device can be pressurized through the piston plate and the pushing assembly in the pressurization mechanism, so that whether the sealing performance of the distillation device is good or not after installation is judged, and a student does not need to check the air tightness by holding or heating the distillation flask; the efficiency and the accuracy of air tightness inspection of the distillation device are improved, the teaching content of chemical experiments is enriched, and convenience is provided for teachers to carry out chemical experiment teaching guidance.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical experiment teaching aids, in particular to a chemical experiment teaching aid. Background Art

[0002] In chemical experiment teaching, the reasonable design and use of experimental equipment play a vital role in the smooth conduct of the experiment and the accuracy of the experimental results. Among them, the installation standard of the laboratory atmospheric distillation device and the qualified airtightness inspection are the basis for the smooth progress of the distillation experiment.

[0003] The traditional air tightness check is to hold the distillation flask in the distillation device by hand or heat the distillation flask, connect a soft rubber tube to the tail end of the liquid receiving pipe of the distillation device, insert it into the water to check whether there are bubbles, so as to judge whether the air tightness is qualified. However, both methods have shortcomings such as long inspection time and poor accuracy. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art and provides a chemical experiment teaching tool.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A chemical experiment teaching tool comprises a distillation device, wherein a pressurizing tube is fixedly installed on the side wall of a distillation head in the distillation device, a first one-way valve is fixedly installed inside the pressurizing tube, a piston plate is movably installed inside the pressurizing tube, and a driving assembly is arranged on the pressurizing tube, and the driving assembly is used to drive the piston plate to move.

[0007] The above technical solution further includes: a container, water is placed inside the container, a soft rubber tube is installed at the tail end of the liquid receiving pipe of the distillation device, and one end of the soft rubber tube away from the tail end of the liquid receiving pipe is placed inside the container.

[0008] The driving assembly includes a threaded rod rotatably connected to the outer wall of the piston plate, a threaded hole is provided on the side wall of the pressurized tube away from the distillation head of the distillation device, the threaded rod is threadedly connected to the inside of the threaded hole, and a rotating plate is fixedly connected to the end of the threaded rod away from the piston plate.

[0009] The driving assembly includes a push rod fixedly mounted on the outer wall of the piston plate, a push handle fixedly mounted on one end of the push rod away from the piston plate, a slide groove is provided on the side wall of the end of the pressurizing tube away from the distillation head of the distillation device, and the outer wall of the push rod is slidably connected to the inner wall of the slide groove.

[0010] An air intake pipe is installed on the outer wall of the pressurizing pipe, and a second one-way valve is installed inside the air intake pipe.

[0011] An annular limiting plate is fixedly mounted on the inner wall of the pressure pipe.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, a pressurizing mechanism is provided, and the interior of the distillation device can be pressurized by the piston plate and the pushing assembly in the pressurizing mechanism, so as to judge whether the sealing of the distillation device is good after installation. Students do not need to hold the distillation flask in the distillation device by hand or heat the distillation flask to perform air-tightness inspection, which improves the efficiency and accuracy of the air-tightness inspection of the distillation device, enriches the teaching content of chemical experiments, and provides convenience for teachers to conduct chemical experiment teaching guidance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic cross-sectional view of a chemical experiment teaching tool proposed by the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0016] Figure 3 Schematic diagram of the structure of the second propulsion component.

[0017] In the figure:

[0018] 10. Distillation head; 11. Pressurizing pipe; 12. Annular limit plate; 13. First one-way valve; 14. Air inlet pipe; 15. Second one-way valve; 20. Container; 30. Soft rubber tube; 41. Piston plate; 42. Threaded rod; 43. Rotating plate; 44. Threaded hole; 51. Push rod; 52. Push handle; 53. Slide groove. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Embodiment 1

[0021] Refer to the attached Figure 1 and 3 The utility model proposes a chemical experiment teaching tool, including a distillation head 10 in a distillation device, a pressurizing tube 11 is fixedly installed on the side wall of the distillation head 10, a first one-way valve 13 is fixedly installed inside the pressurizing tube 11, a piston plate 41 is movably installed inside the pressurizing tube 11, and a driving component is arranged on the pressurizing tube 11, and the driving component is used to drive the piston plate 41 to move; wherein, the first one-way valve 13 is installed inside the pressurizing tube 11, so that the gas inside the pressurizing tube 11 can enter the interior of the distillation device, while the gas inside the distillation device cannot enter the pressurizing tube 11.

[0022] It also includes a container 20, in which water is placed, and a soft rubber tube 30 is installed at the tail end of the liquid receiving pipe of the distillation device, and one end of the soft rubber tube 30 away from the tail end of the liquid receiving pipe of the distillation device is placed in the container 20; wherein, when the air tightness test of the distillation device is carried out, the gas inside the distillation device enters into the water inside the container 20 through the soft rubber tube 30, and bubbles are generated in the water, thereby verifying whether the air tightness is good.

[0023] The driving assembly includes a push rod 51 fixedly mounted on the outer wall of the piston plate 41, a push handle 52 is fixedly mounted on the end of the push rod 51 away from the piston plate 41, a slide groove 53 is provided on the side wall of the end of the pressurizing tube 11 away from the distillation head 10 of the distillation device, and the outer wall of the push rod 51 is slidably connected to the inner wall of the slide groove 53; wherein, the driving assembly can drive the piston plate 41 to move, so that the air in the pressurizing tube 11 is squeezed into the distillation device, and the gas enters the water in the container 20 through the soft rubber tube 30, so that it can be observed whether the air tightness is good.

[0024] An air intake pipe 14 is installed on the outer wall of the pressurized tube 11 (the air intake pipe 14 is connected to the interior of the pressurized tube 11), and a second one-way valve 15 is installed inside the air intake pipe 14; wherein, in order to reset the piston plate 41 to its initial position for the convenience of the next experiment, an air intake pipe 14 is provided here so that the external gas can be drawn into the interior of the pressurized tube 11, and a second one-way valve 15 is installed inside the air intake pipe 14 so that when the piston plate 41 is pushed, the gas inside the pressurized tube 11 will not be discharged into the external air through the air intake pipe 14.

[0025] An annular limiting plate 12 is fixedly mounted on the inner wall of the pressure tube 11 , wherein the annular limiting plate 12 is used to limit the movable position of the piston plate 41 .

[0026] In this embodiment, the working principle of the device is as follows: when conducting an experimental inspection of the air tightness of the distillation device, the distillation device is first installed, and then the air tightness inside the distillation device is checked to see if it is intact after the installation is completed;

[0027] When checking, the push handle 52 is pushed, and the push handle 52 drives the push rod 51 and the piston plate 41 to move, so that the gas inside the pressurized tube 11 is pushed into the distillation device, and the pressure inside the distillation device increases, so that the gas enters the soft rubber tube 30, and then enters the water inside the container 20 through the soft rubber tube 30. By observing the bubbles in the water, it is judged whether the air tightness of the distillation device is good;

[0028] The device does not require students to hold the distillation flask by hand or heat the distillation flask to perform air-tightness inspection, which improves the efficiency and accuracy of the air-tightness inspection of the distillation device, enriches the content of chemical experiment teaching, and provides convenience for teachers to conduct chemical experiment teaching guidance.

[0029] Embodiment 2

[0030] like Figure 2 As shown, based on the first embodiment, the driving assembly includes a threaded rod 42 rotatably connected to the outer wall of the piston plate 41, a threaded hole 44 is provided on the side wall of the end of the pressurized tube 11 away from the distillation head 10 of the distillation device, the threaded rod 42 is threadedly connected to the inside of the threaded hole 44, and a rotating plate 43 is fixedly connected to the end of the threaded rod 42 away from the piston plate 41.

[0031] In the present embodiment, in order to prevent students from pushing the piston plate 41 violently and damaging the first one-way valve 13 and the second one-way valve 15, a threaded rod 42 is provided. By rotating the rotating plate 43, the threads on the outer wall of the threaded rod 42 are engaged with the threads on the inner wall of the threaded hole 44, thereby driving the piston plate 41 to move forward slowly, thereby avoiding the phenomenon of damaging the first one-way valve 13 and the second one-way valve 15 due to a violent push, thereby improving the service life of the device.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A chemical experiment teaching tool, comprising a distillation device, characterized in that: A pressurizing tube (11) is fixedly mounted on the side wall of the distillation head (10) in the distillation device, a first one-way valve (13) is fixedly mounted inside the pressurizing tube (11), a piston plate (41) is movably mounted inside the pressurizing tube (11), and a driving assembly is provided on the pressurizing tube (11), and the driving assembly is used to drive the piston plate (41) to move.

2. A chemical experiment teaching tool according to claim 1, characterized in that: It also includes a container (20), in which water is placed. A soft rubber tube (30) can be installed at the tail end of the liquid receiving pipe of the distillation device, and one end of the soft rubber tube (30) away from the tail end of the liquid receiving pipe is placed inside the container (20).

3. A chemical experiment teaching tool according to claim 1, characterized in that: The driving assembly includes a threaded rod (42) rotatably connected to the outer wall of the piston plate (41); a threaded hole (44) is provided on the side wall of one end of the pressurizing tube (11) away from the distillation head (10) of the distillation device; the threaded rod (42) is threadedly connected to the inside of the threaded hole (44); and a rotating plate (43) is fixedly connected to one end of the threaded rod (42) away from the piston plate (41).

4. A chemical experiment teaching tool according to claim 1, characterized in that: The driving assembly includes a push rod (51) fixedly mounted on the outer wall of the piston plate (41), a push handle (52) fixedly mounted on one end of the push rod (51) away from the piston plate (41), a slide groove (53) is provided on the side wall of one end of the pressurizing tube (11) away from the distillation head (10) of the distillation device, and the outer wall of the push rod (51) is slidably connected to the inner wall of the slide groove (53).

5. A chemical experiment teaching tool according to claim 1, characterized in that: An air intake pipe (14) is installed on the outer wall of the pressurizing pipe (11), and a second one-way valve (15) is installed inside the air intake pipe (14).

6. A chemical experiment teaching tool according to claim 5, characterized in that: An annular limiting plate (12) is fixedly mounted on the inner wall of the pressure pipe (11).

Images