Teaching device for gas temperature measurement

Abstract

The utility model relates to the technical field of teaching aids, discloses a teaching device for gas temperature measurement, and solves the problems that when a piston is pressed down, when the pressure in the piston cylinder is increased and the temperature rises, a thermometer can display the temperature in the piston cylinder, but manual operation of a human body is needed, the process of pressing down the piston consumes more manpower, and the working efficiency is high. And the pressure stability is difficult to guarantee. Comprising a support and a cylinder, a base plate is fixedly arranged at the bottom end of the support, the cylinder is fixedly arranged in the middle of the top end of the base plate, a valve and a pressure gauge are arranged at the bottom of the cylinder, a sealing piston is slidably connected into the cylinder, a temperature sensor is embedded in the middle of the bottom end of the sealing piston, and a shell is fixedly arranged on the inner wall of the middle of the top end of the support; the motor drives the lead screw, the sliding table can drive the sealing piston to descend through the vertical rod, gas in the cylinder can be compressed in the descending process of the sealing piston, teaching personnel do not need to apply pressure to the sealing piston manually, and manpower is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching tools, in particular to a teaching device for measuring gas temperature. Background Art

[0002] When a gas is compressed, its temperature usually rises. This is because the pressure and temperature of the gas are directly proportional. That is, when a gas is compressed, its pressure increases, and the increase in pressure causes the thermal motion of the gas molecules to increase, so the temperature of the gas will also increase. This process is called adiabatic compression.

[0003] According to the "An Experimental Teaching Aid for the Relationship between Pressure and Temperature in Physics Teaching" provided by Chinese Patent Authorization Announcement No. CN204045083U, by pressing down the piston, the pressure in the piston cylinder increases due to the increase in temperature, and the thermometer can display the temperature in the piston cylinder. However, manual operation is required, and the process of pressing down the piston is labor-intensive, and the hands are prone to shaking, making it difficult to ensure the stability of the pressure. In addition, the thermometer needs to be passed through one side of the piston cylinder with one end of it placed in the piston cylinder, making it difficult to ensure the sealing between the thermometer and the piston cylinder, and it is inconvenient to install and remove the thermometer. Utility Model Content

[0004] The utility model provides a teaching device for measuring gas temperature, which solves the technical problems that when the temperature rises due to the increase of pressure in the piston cylinder by pressing down the piston, the thermometer can display the temperature in the piston cylinder, but manual operation is required, the process of pressing down the piston is labor-intensive, and it is difficult to ensure the stability of pressure.

[0005] In order to solve the above technical problems, the utility model provides a teaching device for gas temperature measurement, including a bracket and a cylinder, a pad is fixedly provided at the bottom end of the bracket, a cylinder is fixedly provided in the middle of the top end of the pad, a valve and a pressure gauge are respectively provided at the bottom of the cylinder, a sealing piston is slidably connected inside the cylinder, a temperature sensor is embedded in the middle of the bottom end of the sealing piston, an outer shell is fixedly provided on the inner wall in the middle of the top end of the bracket, a screw rod is rotatably connected inside the outer shell, the screw rod is threadedly connected to a slide table through a threaded sleeve, both sides of the bottom end of the slide table are fixedly connected to the two sides of the top end of the sealing piston through vertical rods, a chassis is provided at the top end of the bracket, a temperature display is provided on the front side of the chassis, a motor is provided inside the chassis, and the output shaft of the motor is connected to the screw rod.

[0006] Preferably, an inspection cover is fixedly connected to the front of the shell by screws, convex strips are fixedly provided on the inner walls on both sides of the shell, sliding grooves are opened on both sides of the slide, and both sides of the slide are slidingly connected to the two convex strips through the sliding grooves, and the threaded sleeve is fixedly connected to the middle part of the slide.

[0007] Preferably, an oblique-mouth plug is provided at the bottom end of the sealing piston, and two annular grooves are provided on the surface of the sealing piston. Two sealing rings are snap-fitted and connected to the two annular grooves, and the two sealing rings are made of rubber material.

[0008] Preferably, a battery is fixedly provided inside the chassis, a charging terminal is embedded in one side of the chassis, a carrying handle is fixedly provided in the middle of the top of the chassis, and a protective cover is fixedly installed on the back of the chassis by screws.

[0009] Preferably, the valve is fixedly connected to an air pipe, the pressure gauge is threadedly connected to a threaded pipe, and one end of the threaded pipe and one end of the valve are both fixedly connected to the bottom of the cylinder.

[0010] Preferably, the width of the pad is greater than the width of the bracket, a rubber pad is provided at the bottom end of the pad, and an anti-aging agent is coated on the surface of the rubber pad.

[0011] Compared with the related art, the beneficial effects of the utility model are:

[0012] The utility model provides a teaching device for measuring gas temperature. By driving a motor screw rod, the screw rod can drive a slide table to descend through a threaded sleeve, and the slide table can drive a sealing piston to descend through a vertical rod. During the descent of the sealing piston, the gas inside the cylinder can be compressed, and the teaching staff does not need to manually apply pressure to the sealing piston, which saves manpower. After the motor stops working, the screw rod can limit the height of the slide table and the sealing piston through the friction between the screw rod and the threaded sleeve. The piston is not easy to shake and has good stability. The stability of the gas pressure and the temperature monitoring accuracy can be maintained, so that the relationship between the pressure and temperature of the gas can be mastered, thereby improving the teaching quality.

[0013] During the process of compressing gas, the gas pressure can be monitored by a pressure gauge, and the gas temperature can be monitored by a temperature sensor at the bottom of the sealing piston. The monitoring data can be transmitted to a temperature display, which is convenient for teaching staff to monitor the temperature of the gas in the cylinder. There is no need to make grooves on the surface of the cylinder to place a thermometer, thus ensuring the sealing of the cylinder. By lifting the sealing piston out of the cylinder, the temperature sensor can be easily installed and removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the cylinder of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the slide table of the utility model.

[0018] Numbers in the figure: 1. bracket; 2. pad; 3. rubber pad; 4. cylinder; 5. valve; 6. air pipe; 7. threaded pipe; 8. pressure gauge; 9. sealing piston; 10. sealing ring; 11. temperature sensor; 12. vertical pole; 13. casing; 14. inspection cover; 15. screw; 16. slide; 17. threaded sleeve; 18. slide; 19. chassis; 20. motor; 21. battery; 22. carrying handle; 23. temperature display; 24. oblique plug. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 A teaching device for measuring gas temperature comprises a bracket 1 and a cylinder 4. A pad 2 is fixedly arranged at the bottom end of the bracket 1. A cylinder 4 is fixedly arranged at the middle of the top end of the pad 2. A valve 5 and a pressure gauge 8 are arranged at the bottom of the cylinder 4 respectively. A sealing piston 9 is slidably connected inside the cylinder 4. A temperature sensor 11 is embedded in the middle of the bottom end of the sealing piston 9. A housing 13 is fixedly arranged on the inner wall of the middle of the top end of the bracket 1. A screw rod 15 is rotatably connected inside the housing 13. The screw rod 15 is threadedly connected to a slide 16 through a threaded sleeve 17. Both sides of the bottom end of the slide 16 are connected The vertical rod 12 is fixedly connected to the two sides of the top of the sealing piston 9 respectively, a chassis 19 is provided at the top of the bracket 1, a temperature display 23 is provided on the front of the chassis 19, a motor 20 is provided inside the chassis 19, the output shaft of the motor 20 is connected to the screw rod 15, the screw rod 15 is driven by the motor 20, the screw rod 15 can drive the slide 16 to descend through the threaded sleeve 17, the slide 16 can drive the sealing piston 9 to descend through the vertical rod 12, the sealing piston 9 can compress the gas inside the cylinder 4 during the descent process, and the teaching staff does not need to manually pressurize the sealing piston 9.

[0021] See also Figure 1 , Figure 2 and Figure 4 The front of the shell 13 is fixedly connected with an inspection cover 14 by screws, the inner walls on both sides of the shell 13 are fixedly provided with convex strips, and both sides of the slide 16 are provided with slide grooves 18. Both sides of the slide 16 are slidably connected with the two convex strips through the slide grooves 18, and the threaded sleeve 17 is fixedly connected to the middle of the slide 16. By opening the inspection cover 14, the interior of the shell 13 can be repaired. The slide 16 can be guided by the slide grooves 18 and the convex strips to prevent the slide 16 from tilting.

[0022] See also Figure 3 A beveled plug 24 is provided at the bottom end of the sealing piston 9, and two annular grooves are provided on the surface of the sealing piston 9. Two sealing rings 10 are engaged and connected in the two annular grooves. The two sealing rings 10 are made of rubber material. The beveled plug 24 can guide the sealing piston 9 to facilitate the insertion of the sealing piston 9 into the cylinder 4. The two sealing rings 10 can ensure the sealing ability of the sealing piston 9 and prevent gas leakage.

[0023] See also Figure 1 and Figure 2 A battery 21 is fixedly provided inside the chassis 19, a charging terminal is embedded in one side of the chassis 19, a carrying handle 22 is fixedly provided in the middle of the top of the chassis 19, and a protective cover is fixedly installed on the back of the chassis 19 by screws. The battery 21 can be charged through the charging terminal, and the motor 20 and the temperature display 23 can be powered by the battery 21. The carrying handle 22 facilitates the movement of the bracket 1.

[0024] See also Figure 3 The valve 5 is fixedly connected to the air pipe 6, and the pressure gauge 8 is threadedly connected to the threaded pipe 7. One end of the threaded pipe 7 and one end of the valve 5 are fixedly connected to the bottom of the cylinder 4. The pressure gauge 8 can be positioned through the threaded pipe 7 to facilitate the installation and removal of the pressure gauge 8. Air can be intake and exhaust through the air pipe 6.

[0025] See also Figure 1 The width of the pad 2 is greater than the width of the bracket 1. A rubber pad 3 is provided at the bottom end of the pad 2. The surface of the rubber pad 3 is coated with an anti-aging agent. The pad 2 and the rubber pad 3 can improve the stability of the bracket 1, and the bracket 1 is not easy to tip over.

[0026] In summary, in the present invention, when teaching the relationship between gas pressure and temperature, the teaching staff first closes the valve 5, and then drives the screw rod 15 through the motor 20. The screw rod 15 can convert the rotational motion into the linear motion of the slide 16 through the threaded sleeve 17. The slide 16 drives the sealing piston 9 to descend through the vertical rod 12, so that the sealing piston 9 compresses the gas inside the cylinder 4. The sealing ring 10 can ensure the sealing ability of the sealing piston 9. After stopping the work of the motor 20, the screw rod 15 can limit the height of the slide 16 and the sealing piston 9 through the friction between the threaded sleeve 17, and the stability of the sealing piston 9 can be maintained. People can monitor the air pressure through the pressure gauge 8, and the temperature sensor 11 can monitor the temperature of the gas and transmit the monitoring data to the temperature display 23. When it is necessary to test the temperature of different gases, the teaching staff first opens the valve 5, controls the sealing piston 9 to descend, discharges the air inside the cylinder 4, and then connects the air pipe 6 to the pipelines of different gases, and then controls the sealing piston 9 to rise, so that the different gases to be tested can be drawn into the cylinder 4, and finally closes the valve 5 to prevent gas leakage. After the teaching is completed, the teaching staff will lift the sealing piston 9 out of the cylinder 4 and can install and remove the temperature sensor 11 at the bottom of the sealing piston 9.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A teaching device for measuring gas temperature, comprising a support (1) and a cylinder (4), characterized in that: A pad (2) is fixedly provided at the bottom end of the support (1), a cylinder (4) is fixedly provided at the middle of the top end of the pad (2), a valve (5) and a pressure gauge (8) are respectively provided at the bottom of the cylinder (4), a sealing piston (9) is slidably connected inside the cylinder (4), a temperature sensor (11) is embedded in the middle of the bottom end of the sealing piston (9), a housing (13) is fixedly provided on the inner wall of the middle of the top end of the support (1), a screw rod (15) is rotatably connected inside the housing (13), the screw rod (15) is threadedly connected to a slide table (16) through a threaded sleeve (17), both sides of the bottom end of the slide table (16) are respectively fixedly connected to both sides of the top end of the sealing piston (9) through vertical rods (12), a chassis (19) is provided at the top end of the support (1), a temperature display (23) is provided on the front of the chassis (19), a motor (20) is provided inside the chassis (19), and an output shaft of the motor (20) is connected to the screw rod (15).

2. A teaching device for gas temperature measurement according to claim 1, characterized in that: The front of the housing (13) is fixedly connected with an inspection cover (14) by screws, the inner walls on both sides of the housing (13) are fixedly provided with convex strips, both sides of the slide (16) are provided with slide grooves (18), both sides of the slide (16) are slidably connected with the two convex strips through the slide grooves (18), and the threaded sleeve (17) is fixedly connected with the middle part of the slide (16).

3. A teaching device for gas temperature measurement according to claim 1, characterized in that: The bottom end of the sealing piston (9) is provided with an oblique plug (24), and the surface of the sealing piston (9) is provided with two annular grooves, and the two annular grooves are both engaged and connected with two sealing rings (10), and the two sealing rings (10) are both made of rubber material.

4. A teaching device for gas temperature measurement according to claim 1, characterized in that: A storage battery (21) is fixedly arranged inside the chassis (19), a charging terminal is embedded on one side of the chassis (19), a carrying handle (22) is fixedly arranged in the middle of the top of the chassis (19), and a protective cover is fixedly mounted on the back of the chassis (19) by means of screws.

5. A teaching device for gas temperature measurement according to claim 1, characterized in that: The valve (5) is fixedly connected to the air pipe (6), the pressure gauge (8) is threadedly connected to the threaded pipe (7), and one end of the threaded pipe (7) and one end of the valve (5) are both fixedly connected to the bottom of the cylinder (4).

6. A teaching device for gas temperature measurement according to claim 1, characterized in that: The width of the pad (2) is greater than the width of the bracket (1); a rubber pad (3) is provided at the bottom end of the pad (2); and an anti-aging agent is coated on the surface of the rubber pad (3).

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