Device for demonstrating principle of empty box self-recording barometer

Abstract

The utility model belongs to the technical field of empty box self-recording barometers, and particularly relates to an empty box self-recording barometer principle demonstration device which comprises a base, a placing plate is installed on the base, a motor is installed on the placing plate through a machine base, a placing cylinder is installed on an output shaft of the motor, and a recording cylinder is placed on the placing cylinder. A paper groove is formed in the rotating rod, recording paper is placed in the paper groove, a plurality of diaphragm capsules are installed on the supporting frame, a lever is fixedly arranged on the rotating rod in a sleeving mode, the other end of the lever is fixedly connected with the top ends of the diaphragm capsules, and a pointer is fixedly arranged on the rotating rod in a sleeving mode. The external atmospheric pressure of the empty box self-recording barometer is rapidly changed in a vacuumizing mode, so that the change can be obviously seen, air is pumped away, the air pressure is reduced, the pointer is downward, then air is put in, the air pressure is increased, and the pointer is upward, the change of the atmospheric pressure can be obviously seen through the structure, and the demonstration effect is favorably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of empty box self-recording barometers, in particular to a device for demonstrating the principle of an empty box self-recording barometer. Background Art

[0002] The working principle of the empty box self-recording barometer is to use a metal empty box as a sensing element to measure atmospheric pressure in a state where the elastic force of the empty box is balanced with the atmospheric pressure. In the fields of meteorological observation, environmental monitoring, scientific research, education and training, the empty box self-recording barometer principle demonstration device is used to measure and record atmospheric pressure.

[0003] The empty box self-recording barometer principle demonstration device consists of a fixed frame, a lever, an empty box, a pointer and a paper tube. By placing the device in a closed container and changing the pressure inside the container through vacuum extraction, the empty box inside the empty box self-recording barometer will deform, and the pointer connected to the lever will move up and down. As the paper tube rotates, the numbers recorded by the pointer will be left behind.

[0004] Existing empty box self-recording barometer recording paper is usually divided into two types: diary type and weekly type. The paper tube rotates very slowly, and under normal weather conditions, the change in atmospheric pressure is usually small, the phenomenon is not obvious, and the demonstration effect is poor. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve the problems existing in the prior art, the utility model proposes a device for demonstrating the principle of an empty box self-recording barometer.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes an empty box self-recording barometer principle demonstration device, comprising a base, a placing plate installed on the base, a motor installed on the placing plate through a machine base, a placing cylinder installed on the output shaft of the motor, a fixing rod installed on the placing cylinder for rotation with the placing plate, a threaded top end of the fixing rod, a recording cylinder placed on the placing cylinder, a rod seat fixedly installed on the top plate of the recording cylinder, a threaded inner wall of the rod seat, the rod seat connected to the fixing rod through a threaded inner wall, a first knob installed on the rod seat, a clamping ring installed on the bottom side of the outer wall of the recording cylinder, a paper groove provided on the clamping ring, four sets of guide plates fixedly installed on the top side of the recording cylinder, a guide groove provided in the guide plate, a guide block assembled in the guide groove, a connecting plate installed on the guide block, A cover plate is installed on the connecting plate, and the cover plate is an annular structure, and a screw rod is rotatably installed on the inner wall of one of the guide grooves, and a second knob is welded on the top side of the screw rod, and recording paper is placed in the paper slot, and a support frame is installed on the base, and multiple membrane boxes are installed on the support frame, and a fixing frame is symmetrically installed on the base, and a rotating rod is rotatably installed between the fixing frames, and a lever is fixedly sleeved on the rotating rod, and the other end of the lever is fixedly connected to the top of the membrane box, and a pointer is fixedly sleeved on the rotating rod, and a pen holder is installed on the pointer. By accelerating the rotation speed of the recording cylinder, it is placed in a vacuum container, and the external atmospheric pressure of the empty box self-recording barometer is quickly changed by vacuuming, so that the change can be clearly seen. When the air is sucked out, the air pressure becomes low, the pointer goes down, and then air is put in, the air pressure increases, and the pointer goes up. This structure can clearly see the change of atmospheric pressure, which is conducive to improving the visibility of the demonstration effect.

[0007] Preferably, four groups of leveling components are installed on the bottom side of the base, and the leveling components include a connecting tube, the connecting tube is fixedly connected to the bottom side of the base, and an adjusting knob is rotatably installed on the bottom side of the connecting tube, a thread is provided on the inner wall of the adjusting knob, a screw is passed through the adjusting knob and the connecting tube, a cup foot is installed on the bottom side of the screw, a groove is provided on the base, a spirit level is installed in the groove, liquid and bubbles are contained in the spirit level, and the base is covered with a glass cover, and the adjusting knob is rotated, and the adjusting knob moves vertically during the rotation of the screw, and the adjusting knob drives the connecting tube to move vertically, and the connecting tube drives one end angle of the base to move vertically, and by adjusting the heights of the four end angles of the base, the bubble is adjusted to the center of the container, thereby achieving leveling of the base, so that the device is in a horizontal state, which is beneficial to reducing measurement errors.

[0008] The utility model is beneficial in that:

[0009] 1. The utility model accelerates the rotation speed of the recording tube and places it in a vacuum container. The external atmospheric pressure of the empty box self-recording barometer is quickly changed by vacuuming, so that the change can be clearly seen. When the air is pumped out, the air pressure becomes lower and the pointer moves downward. When air is reintroduced, the air pressure increases and the pointer moves upward. This structure can clearly see the change in atmospheric pressure, which is conducive to improving the visibility of the demonstration effect.

[0010] 2. The utility model rotates the adjusting knob, and the adjusting knob moves in the vertical direction during the rotation on the screw. The adjusting knob drives the connecting tube to move in the vertical direction, and the connecting tube drives one end corner of the base to move in the vertical direction. By adjusting the heights of the four end corners of the base, the bubble is adjusted to the center of the container, thereby achieving leveling of the base, making the device in a horizontal state, which is beneficial to reducing measurement errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 It is a schematic diagram of a first-person perspective three-dimensional structure;

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the placement tube;

[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of the recording paper;

[0015] Figure 4 It is a schematic diagram of the three-dimensional structure of the lever;

[0016] Figure 5 It is a schematic diagram of the three-dimensional structure of the adjustment knob.

[0017] In the figure: 1. Base; 2. Placement plate; 3. Motor; 4. Placement tube; 5. Fixed rod; 6. Recording tube; 7. Rod seat; 8. First knob; 9. Snap ring; 10. Paper slot; 11. Guide plate; 12. Guide slot; 13. Guide block; 14. Connecting plate; 15. Cover plate; 16. Screw; 17. Second knob; 18. Recording paper; 19. Support frame; 20. Membrane box; 21. Fixed frame; 22. Rotating rod; 23. Lever; 24. Pointer; 25. Connecting tube; 26. Adjustment knob; 27. Screw; 28. Cup foot; 29. ​​Level; 30. Bubble; 31. Glass cover; 32. Pen holder. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-4As shown, a device demonstrating the principle of an empty box self-recording barometer includes a base 1, a placement plate 2 is mounted on the base 1, a motor 3 is mounted on the placement plate 2 through a machine base, a placement tube 4 is mounted on the output shaft of the motor 3, the bottom side of the placement tube 4 is rotatably connected to the placement plate 2, a fixing rod 5 is mounted on the placement tube 4, the top of the fixing rod 5 is provided with a thread, a recording tube 6 is placed on the placement tube 4, a rod seat 7 is fixedly mounted on the top plate of the recording tube 6, a thread is provided on the inner wall of the rod seat 7, the rod seat 7 is connected to the fixing rod 5 through a thread, a first knob 8 is mounted on the rod seat 7, a snap ring 9 is mounted on the bottom side of the outer wall of the recording tube 6, a paper slot 10 is provided on the snap ring 9, and four sets of The guide plate 11 has a guide groove 12 in the guide plate 11, a guide block 13 is installed in the guide groove 12, a connecting plate 14 is installed on the guide block 13, a cover plate 15 is installed on the connecting plate 14, and the cover plate 15 is an annular structure. A screw rod 16 is rotatably installed on the inner wall of one of the guide grooves 12, and a second knob 17 is welded to the top side of the screw rod 16. A recording paper 18 is placed in the paper slot 10, a support frame 19 is installed on the base 1, and a plurality of film boxes 20 are installed on the support frame 19. A fixing frame 21 is symmetrically installed on the base 1, and a rotating rod 22 is rotatably installed between the fixing frames 21. A lever 23 is fixed on the rotating rod 22, and the other end of the lever 23 is fixed to the top of the film box 20. The pointer 24 is fixedly mounted on the rotating rod 22, and the pen holder 32 is mounted on the pointer 24. When working, the existing empty box self-recording barometer recording paper 18 is usually divided into two types: diary type and weekly type. The recording tube 6 rotates very slowly, and under normal weather conditions, the amplitude of the change in atmospheric pressure is usually small, and the phenomenon is not obvious, resulting in a poor demonstration effect. In the process of installing the recording paper 18, the recording paper 18 is wound around the outer periphery of the recording tube 6, and the bottom side of the recording paper 18 is stuck in the paper slot 10. The second knob 17 is turned to drive the screw rod 16 to rotate, and the screw rod 16 drives the guide block 13 thereon to move vertically downward, and the guide block 13 drives the connecting plate 14 vertically. Move downward, the connecting plate 14 drives the cover plate 15 to move vertically downward, and the cover plate 15 clamps the top end of the recording paper 18 between the cover plate 15 and the recording tube 6. At this time, the recording paper 18 is stably sleeved on the outer periphery of the recording tube 6 and is parallel to the recording tube 6. Then, the recording tube 6 is sleeved on the placement tube 4, and the first knob 8 is turned to drive the rod seat 7 to rotate. The fixing rod 5 is screwed into the rod seat 7, thereby achieving a fixed connection between the fixing rod 5 and the rod seat 7, and a fixed connection between the placement tube 4 and the recording tube 6. Since the recording paper 18 is stably clamped on the recording tube 6, the recording paper 18 will not deviate. In the subsequent measurement and recording process, the recording paper 18 is neatly placed, thereby achieving accurate recording of the air pressure value;

[0020] The principle of this device is that when the external atmospheric pressure changes, the membrane box 20 inside will deform. The lever 23 connected to the membrane box 20 can amplify the tiny change to the pointer 24. Before a typhoon comes, the air pressure drops sharply, and the number recorded by the pointer 24 becomes smaller.

[0021] During the demonstration, the device is placed in a sealed container, and the pressure in the container is changed by vacuuming, so that the membrane box 20 in the device will be deformed. The interior of the membrane box 20 is in a vacuum state. Multiple membrane boxes 20 are placed in series, so that the deformation effect is obvious. The deformation of the membrane box 20 drives the lever 23 to deflect clockwise or counterclockwise, and the lever 23 drives the rotating rod 22 to rotate clockwise or counterclockwise. The rotating rod 22 drives the pointer 24 to deflect clockwise or counterclockwise, and the pointer 24 drives the pen shaft 32 to move up and down. The motor 3 is operated to drive the placement cylinder 4 to rotate, and the placement cylinder 4 drives the recording cylinder 6 to rotate. The recording cylinder 6 drives the recording paper 18 clamped thereon to rotate. As the recording paper 18 rotates, the numbers recorded by the pen shaft 32 are left.

[0022] The membrane box 20 is a thin film empty box made of elastic metal. It acts as a sensing element to convert atmospheric pressure into elastic displacement of the empty box, and drives the pointer 24 to move through the lever 23 and the rotating rod 22. When it deflects in the clockwise direction, the pointer 24 indicates the change in air pressure increase, and conversely, it indicates the change in air pressure decrease. When the elastic stress of the membrane box 20 is balanced with the atmospheric pressure, the pointer 24 stops moving, and the air pressure value indicated by the pointer 24 is the atmospheric pressure value at that time; this structure speeds up the rotation speed of the recording tube 6, puts it into a vacuum container, and quickly changes the external atmospheric pressure of the empty box self-recording barometer by vacuuming, so that the change is obvious. When the air is sucked out, the air pressure becomes low, and the pointer 24 goes down. When air is put in again, the air pressure increases, and the pointer 24 goes up. This structure can clearly see the change in atmospheric pressure, which is conducive to improving the visibility of the demonstration effect.

[0023] See also Figure 5As shown, four sets of leveling components are installed on the bottom side of the base 1, and the leveling components include a connecting tube 25, which is fixedly connected to the bottom side of the base 1, and an adjusting knob 26 is rotatably installed on the bottom side of the connecting tube 25. The inner wall of the adjusting knob 26 is provided with a thread, and a screw 27 passes through the adjusting knob 26 and the connecting tube 25. A cup foot 28 is installed on the bottom side of the screw 27. A groove is provided on the base 1, and a spirit level 29 is installed in the groove. The spirit level 29 is filled with liquid and bubbles 30, and the base 1 is covered with a glass cover 31. When working, the existing empty box self-recording barometer principle demonstration device cannot be leveled before the demonstration, and the device is prone to tilting. Errors are prone to occur during the measurement and recording process, resulting in large error values ​​in the measurement results. Before the demonstration, the state of the bubble 30 of the spirit level 29 is observed. When the spirit level 29 is in a horizontal position, the bubble 30 will stay in the center of the container. When the spirit level 29 is tilted, the bubble 30 will move to one side of the container according to the direction of the tilt, thereby indicating the direction and angle of the tilt. By turning the adjusting knob 26, the adjusting knob 26 moves in the vertical direction during the rotation on the screw 27. The adjusting knob 26 drives the connecting tube 25 to move in the vertical direction. The connecting tube 25 drives one end corner of the base 1 to move in the vertical direction. By adjusting the heights of the four end corners of the base 1, the bubble 30 is adjusted to the center of the container, thereby realizing the leveling of the base 1, so that the device is in a horizontal state, which is conducive to reducing measurement errors.

[0024] Working principle: The existing empty box self-recording barometer principle demonstration device cannot be leveled before the demonstration. The device is prone to tilt, and errors are prone to occur during the measurement and recording process, resulting in large errors in the measurement results. Before the demonstration, the bubble 30 state of the level 29 is observed. When the level 29 is in a horizontal position, the bubble 30 will stay in the center of the container. When the level 29 is tilted, the bubble 30 will move to one side of the container according to the tilt direction, thereby indicating the tilt direction and angle. By turning the adjusting knob 26, the adjusting knob 26 is adjusted on the screw 27. During the rotation, the adjusting knob 26 drives the connecting tube 25 to move in the vertical direction, and the connecting tube 25 drives one end corner of the base 1 to move in the vertical direction. By adjusting the height of the four end corners of the base 1, the bubble 30 is adjusted to the center of the container, thereby achieving the leveling of the base 1, so that the device is in a horizontal state, which is conducive to reducing the measurement error; the existing empty box self-recording barometer recording paper 18 is usually divided into two types: diary type and weekly type. The recording tube 6 rotates very slowly, and under normal weather conditions, the change amplitude of atmospheric pressure is usually less obvious, resulting in poor demonstration effect. During the installation of the recording paper 18, the recording paper 18 is wound around the periphery of the recording tube 6, the bottom side of the recording paper 18 is stuck in the paper slot 10, and the second knob 17 is turned to drive the screw rod 16 to rotate. The screw rod 16 drives the guide block 13 thereon to move vertically downward. The guide block 13 drives the connecting plate 14 to move vertically downward. The connecting plate 14 drives the cover plate 15 to move vertically downward. The cover plate 15 clamps the top end of the recording paper 18 between the cover plate 15 and the recording tube 6. At this time, the recording paper 18 is stably sleeved on the periphery of the recording tube 6 and is parallel to the recording tube 6. Then, the recording tube 6 is sleeved on the placement tube 4, and the first knob 8 is turned to drive the rod The seat 7 rotates, and the fixing rod 5 is screwed into the rod seat 7, thus achieving a fixed connection between the fixing rod 5 and the rod seat 7, and thus a fixed connection between the placement tube 4 and the recording tube 6. Since the recording paper 18 is stably stuck on the recording tube 6, the recording paper 18 will not shift. During the subsequent measurement and recording process, the recording paper 18 is neatly placed, achieving an accurate record of the air pressure value. The principle of this device is that when the external atmospheric pressure changes, the membrane box 20 inside will deform. The lever 23 connected to the membrane box 20 can amplify the small change to the pointer 24. Before a typhoon arrives, the air pressure drops sharply, and the number recorded by the pointer 24 becomes smaller.During the demonstration, the device is placed in a sealed container, and the pressure in the container is changed by vacuuming, so that the membrane box 20 in the device will be deformed. The interior of the membrane box 20 is in a vacuum state. Multiple membrane boxes 20 are placed in series, so that the deformation effect is obvious. The deformation of the membrane box 20 drives the lever 23 to deflect clockwise or counterclockwise, and the lever 23 drives the rotating rod 22 to rotate clockwise or counterclockwise. The rotating rod 22 drives the pointer 24 to deflect clockwise or counterclockwise, and the pointer 24 will drive the pen shaft 32 to move up and down, and the motor 3 is operated to drive the placement tube 4 to rotate, and the placement tube 4 drives the recording tube 6 to rotate, and the recording tube 6 drives the recording paper 18 clamped thereon to rotate. As the recording paper 18 rotates, the numbers recorded by the pen shaft 32 will be left behind; the membrane box 20 is elastic A thin film hollow cell made of a flexible metal acts as a sensing element, converting atmospheric pressure into elastic displacement of the cell. This displacement, driven by lever 23 and rotating rod 22, drives pointer 24. When deflected clockwise, pointer 24 indicates an increase in pressure; conversely, it indicates a decrease in pressure. When the elastic stress of membrane cell 20 balances the atmospheric pressure, pointer 24 stops moving, and the pressure indicated by pointer 24 is the prevailing atmospheric pressure. This structure accelerates the rotation of recording cylinder 6 and places it within a vacuum container. This vacuum rapidly changes the atmospheric pressure outside the hollow cell self-recording barometer, allowing for visible changes. When air is removed, the pressure drops, causing pointer 24 to move downward. When air is reintroduced, the pressure rises, causing pointer 24 to move upward. This structure allows for clear changes in atmospheric pressure, enhancing the clarity of the demonstration.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A device demonstrating the principle of an empty box self-recording barometer, characterized by: The invention comprises a base (1), a placing plate (2) is installed on the base (1), a motor (3) is installed on the placing plate (2) through a machine base, a placing cylinder (4) is installed on the output shaft of the motor (3), the bottom side of the placing cylinder (4) is rotatably connected to the placing plate (2), a fixing rod (5) is installed on the placing cylinder (4), a thread is provided on the top of the fixing rod (5), a recording cylinder (6) is placed on the placing cylinder (4), a rod seat (7) is fixedly installed on the top plate of the recording cylinder (6), a thread is provided on the inner wall of the rod seat (7), the rod seat (7) is connected to the fixing rod (5) through a thread, a first knob (8) is installed on the rod seat (7), and the A clamping ring (9) is installed on the bottom side of the outer wall of the recording tube (6), and a paper groove (10) is provided on the clamping ring (9). Four sets of guide plates (11) are fixedly installed on the top side of the recording tube (6), and a guide groove (12) is provided in the guide plate (11). A guide block (13) is assembled in the guide groove (12), and a connecting plate (14) is installed on the guide block (13). A cover plate (15) is installed on the connecting plate (14). The cover plate (15) is an annular structure, and a screw rod (16) is rotatably installed on the inner wall of one of the guide grooves (12). A second knob (17) is welded to the top side of the screw rod (16). Recording paper (18) is placed in the paper groove (10).

2. The device for demonstrating the principle of an empty box self-recording barometer according to claim 1, characterized in that: A support frame (19) is mounted on the base (1), and a plurality of membrane boxes (20) are mounted on the support frame (19).

3. The device for demonstrating the principle of an empty box self-recording barometer according to claim 1, characterized in that: The base (1) is symmetrically mounted with fixing frames (21), a rotating rod (22) is rotatably mounted between the fixing frames (21), a lever (23) is fixedly sleeved on the rotating rod (22), and the other end of the lever (23) is fixedly connected to the top end of the membrane box (20).

4. The device for demonstrating the principle of an empty box self-recording barometer according to claim 3, characterized in that: A pointer (24) is fixedly sleeved on the rotating rod (22), and a pen holder (32) is mounted on the pointer (24).

5. The device for demonstrating the principle of an empty box self-recording barometer according to claim 1, characterized in that: Four sets of leveling components are installed on the bottom side of the base (1). The leveling components include a connecting tube (25). The connecting tube (25) is fixedly connected to the bottom side of the base (1). An adjusting knob (26) is rotatably installed on the bottom side of the connecting tube (25). The inner wall of the adjusting knob (26) is provided with a thread. A screw rod (27) passes through the adjusting knob (26) and the connecting tube (25). A cup foot (28) is installed on the bottom side of the screw rod (27).

6. The device for demonstrating the principle of an empty box self-recording barometer according to claim 1, characterized in that: The base (1) is provided with a groove, a spirit level (29) is installed in the groove, the spirit level (29) is filled with liquid and bubbles (30), and the base (1) is covered with a glass cover (31).

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