Automatic vacuum nitrogen filling device for level gauge

Abstract

The utility model discloses an automatic vacuum nitrogen filling device for a level gauge, which comprises a device box body and a nitrogen tank, the nitrogen tank is positioned on one side of the back of the device box body, an electric cabinet is mounted at the top of the device box body, and a vacuum pump and a nitrogen booster pump are mounted in the electric cabinet. According to the nitrogen filling optimization design of the level gauge, during working, the level gauge is placed in the device box body, the box door is closed, the vacuum pump is started, after it is guaranteed that the interior of the device box body and the interior of the level gauge are in a vacuum state and are stabilized for five minutes, the nitrogen booster pump is started, and nitrogen is slowly filled into the device box body through the nitrogen guide-out pipe; after the steps are finished, nitrogen fills the inside of the level gauge, then sealing treatment is performed, and because the nitrogen belongs to inert gas, after equipment is operated under the standard atmospheric pressure and the level gauge is taken out, the nitrogen does not overflow, so that the completeness of nitrogen filling is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of levels, in particular to an automatic vacuum nitrogen filling device for a level. Background Technique

[0002] A level is an instrument used to establish a horizontal line of sight and measure the height difference between two points on the ground. Currently, when using the instrument outdoors, due to the humid air, high moisture, and a lot of dew outdoors, small water droplets in the air will penetrate into the instrument. After using the instrument, most of the time, the instrument is directly put away. Even if the water droplets on the surface are wiped clean with a dry cloth, the small water droplets inside still cannot be wiped clean. In this case, the lenses inside the instrument are very likely to get moldy due to moisture, thus reducing the service life. Through experiments, it is often found that filling the instrument with nitrogen can effectively avoid this situation. Nitrogen can quickly absorb the small water droplets in the air and keep the inside clean. At the same time, when the instrument is filled with nitrogen inside, its anti-seismic and anti-drop ability will also be higher, providing convenience for users during use.

[0003] After research by the applicant, it is found that the previous method of filling nitrogen is to drill holes in the side wall of the level and directly fill nitrogen into the instrument through a gas pipeline. This method is not easy to operate in batches, and it is impossible to ensure that all the air inside the level is discharged during the nitrogen filling process. There will be air residue, resulting in insufficient nitrogen content inside. At the same time, after the nitrogen filling is completed, the internal pressure is higher than the atmospheric pressure. Due to the pressure difference between the inside and outside of the instrument, most of the nitrogen will be lost, causing a large amount of waste.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and an automatic vacuum nitrogen filling device for a level is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide an automatic vacuum nitrogen filling device for a level to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: It includes a device box body and a nitrogen tank. The nitrogen tank is located on one side of the back of the device box body. An electric control box is installed on the top of the device box body. A vacuum pump and a nitrogen booster pump are installed inside the electric control box. The nitrogen inlet pipe connected to the inlet end of the nitrogen booster pump passes through the electric control box and is docked with the output end of the nitrogen tank. The nitrogen outlet pipe connected to the outlet end of the nitrogen booster pump passes through the electric control box and is inserted into the upper space inside the device box body. The intake pipe of the vacuum pump is inserted into the upper end inside the device box body and the outlet pipe passes through one side of the electric control box.

[0007] Preferably, a central processor and a frequency conversion controller are installed inside the electric control box. The frequency conversion controller is electrically connected to the central processor, the nitrogen booster pump, and the vacuum pump.

[0008] Preferably, a start button and an emergency stop button are installed on the top of the electric control box, and both the start button and the emergency stop button are electrically connected to the central processing unit. The color of the start button is green, and the color of the emergency stop button is set to red.

[0009] Preferably, a nitrogen pressure gauge and a vacuum digital display meter are installed on the top of the electric control box, and the nitrogen pressure gauge and the vacuum digital display meter are respectively used to detect the nitrogen pressure and the vacuum degree inside the device box body.

[0010] Preferably, the intake pipe of the vacuum pump is designed in two sections. One section is connected to the intake end of the vacuum pump, and the other end is connected to the inside of the device box body. The interfaces of the two intake pipes are connected to the two ends of the air source filter, and the air source filter is installed on one side of the electric control box.

[0011] Preferably, a three-color indicator light is installed on the top of the electric control box, and the three-color indicator light is electrically connected to the nitrogen pressure gauge and the vacuum digital display meter.

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

[0013] In the optimized design of nitrogen filling for the level gauge of the present utility model, during operation, the level gauge is placed in the device box body and the box door is closed. The vacuum pump is started to ensure that the inside of the device box body and the inside of the level gauge are in a vacuum state and stable for five minutes. Then, the nitrogen booster pump is started, and nitrogen is slowly filled into the device box body through the nitrogen outlet pipe. After being filled to one atmospheric pressure and being stable for five minutes, the level gauge can be taken out. After the above steps are completed, the inside of the level gauge is filled with nitrogen, and then sealing treatment is carried out. Since nitrogen is an inert gas, under standard atmospheric pressure, when operating the equipment and taking out the level gauge, nitrogen will not overflow, ensuring the integrity of nitrogen filling. Description of the Drawings

[0014] Figure 1 is a schematic three-dimensional structure diagram of the overall automatic vacuum nitrogen filling device for a level gauge of the present utility model Figure 1 ;

[0015] Figure 2 is a schematic three-dimensional structure diagram of the overall automatic vacuum nitrogen filling device for a level gauge of the present utility model Figure 2 ;

[0016] Figure 3 is a schematic internal three-dimensional structure diagram of the electric control box of the automatic vacuum nitrogen filling device for a level gauge of the present utility model.

[0017] In the figure: 1. Device box body; 2. Nitrogen tank; 3. Electric control box; 4. Nitrogen booster pump; 5. Nitrogen inlet pipe; 6. Nitrogen outlet pipe; 7. Vacuum pump; 8. Air outlet pipe; 9. Air inlet pipe; 10. Central processing unit; 11. Frequency conversion controller; 12. Start button; 13. Emergency stop button; 14. Nitrogen pressure gauge; 15. Vacuum digital display meter; 16. Air source filter; 17. Three-color indicator lamp. Specific implementation mode

[0018] The following further describes in detail the implementation mode of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0019] As Figures 1-3 shown, it includes a device box body 1 and a nitrogen tank 2. The nitrogen tank 2 is located on one side of the back of the device box body 1. An electric control box 3 is installed on the top of the device box body 1. A vacuum pump 7 and a nitrogen booster pump 4 are installed inside the electric control box 3. The nitrogen inlet pipe 5 connected to the inlet end of the nitrogen booster pump 4 passes through the electric control box 3 and is docked with the output end of the nitrogen tank 2. The nitrogen outlet pipe 6 connected to the outlet end of the nitrogen booster pump 4 passes through the electric control box 3 and is inserted into the upper space inside the device box body 1. The air inlet pipe 9 of the vacuum pump 7 is inserted into the upper end inside the device box body 1 and the air outlet pipe 8 passes through one side of the electric control box 3.

[0020] Through the above structural design, in the nitrogen filling optimization design of the level gauge, first, a screw eye hole is drilled on the level gauge barrel, so that nitrogen can be automatically filled through this eye hole. During work, the level gauge is placed in the device box body 1 and the box door is closed. The vacuum pump 7 is started, and the gas in the device box body 1 is first discharged through the air outlet pipe 8 through the air inlet pipe 9. The device box body 1 is evacuated to -90 Kpa. After ensuring that the inside of the device box body 1 and the inside of the level gauge are in a vacuum state and stable for five minutes, the nitrogen booster pump 4 is started. Nitrogen in the nitrogen tank 2 is extracted through the nitrogen inlet pipe 5, and nitrogen is slowly filled into the inside of the device box body 1 through the nitrogen outlet pipe 6. After being filled with one atmospheric pressure and stable for five minutes, the level gauge can be taken out. After the above steps are completed, the inside of the level gauge is filled with nitrogen, and then a small screw cap is screwed on the screw eye hole for sealing treatment. Since nitrogen is an inert gas, under standard atmospheric pressure, when operating the equipment and taking out the level gauge, nitrogen will not overflow, ensuring the integrity of nitrogen filling. It should be noted that automatic closing and opening valves are provided on the air inlet pipe 9 of the vacuum pump 7 and the nitrogen outlet pipe 6 of the nitrogen booster pump 4.

[0021] Inside the electric control box 3, a central processor 10 and a frequency conversion controller 11 are installed. The frequency conversion controller 11 is electrically connected to the central processor 10, the nitrogen booster pump 4, and the vacuum pump 7. On the top of the electric control box 3, a start button 12 and an emergency stop button 13 are installed, and both the start button 12 and the emergency stop button 13 are electrically connected to the central processor 10. The color of the start button 12 is green, and the color of the emergency stop button 13 is set to red.

[0022] With the above structural design, in terms of operation control optimization design, when starting the nitrogen booster pump 4 and the vacuum pump 7, the selectable start button 12 can be pressed to start the nitrogen booster pump 4 and the vacuum pump 7 through the central processor 10 and the frequency conversion controller 11. At the same time, the frequency is adjustable, making the operation more convenient. Moreover, the nitrogen booster pump 4 and the vacuum pump 7 can be set to turn on and off regularly, improving the intelligence. The emergency stop button 13 can quickly shut down the nitrogen booster pump 4 and the vacuum pump 7 in case of an emergency, greatly enhancing the safety performance of the equipment through convenient and effective operation.

[0023] On the top of the electric control box 3, a nitrogen pressure gauge 14 and a vacuum digital display 15 are installed. The nitrogen pressure gauge 14 and the vacuum digital display 15 are respectively used to detect the nitrogen pressure and the vacuum degree inside the device box body 1. On the top of the electric control box 3, a three-color indicator light 17 is installed, and the three-color indicator light 17 is electrically connected to the nitrogen pressure gauge 14 and the vacuum digital display 15.

[0024] Through the nitrogen pressure gauge 14 and the vacuum digital display 15, in terms of observation optimization design, the nitrogen pressure gauge 14 and the vacuum digital display 15 respectively conduct real-time detection of the nitrogen pressure and the vacuum degree inside the device box body 1. When the nitrogen booster pump 4 and the vacuum pump 7 are started, causing the internal values to change, the values reach the specified required range, or the values exceed the specified range, the three-color indicator light 17 will give prompts through three color changes, thereby further improving the safety performance and enhancing the working stability.

[0025] The intake pipe 9 of the vacuum pump 7 is designed in a two-section manner. One section is connected to the intake end of the vacuum pump 7, and the other end is connected to the inside of the device box body 1. The interfaces of the two sections of the intake pipe 9 are connected to the two ends of the air source filter 16, and the air source filter 16 is installed on one side of the electric control box 3.

[0026] With the design of the air source filter 16, when the vacuum pump 7 sucks air through the intake pipe 9, the air will also pass through the air source filter 16 to filter impurities in the air, thereby preventing the vacuum pump 7 from being damaged due to dust and playing a good protective role.

[0027] Working principle: During operation, place the leveling instrument to be charged in the device box body 1, close the hatch door, and after pressing the start button 12, start the vacuum pump 7 through the central processor 10 and the frequency conversion controller 11 to pump vacuum. Use the vacuum digital display 15 to detect the internal pressure of the device box body 1. When the pressure reaches -90 kPa, automatically close the valve of the intake pipe 9 for pressure holding, and automatically start the nitrogen booster pump 4 and its input pipe time countdown for 5 minutes.

[0028] After the timing is completed, automatically open the valves of the nitrogen booster pump 4 and the nitrogen outlet pipe 6 to fill nitrogen into the box. After detecting that the pressure in the box reaches the standard atmospheric pressure through the nitrogen pressure gauge 14, close the nitrogen valve of the nitrogen outlet pipe 6 and the nitrogen booster pump 4, and at the same time start the handheld timer to start a 5-minute countdown. After the timing ends, that is, after the overall nitrogen filling process is completed, the nitrogen filling operation for the leveling instrument is completed, and then take out the leveling instrument and seal it.

[0029] The embodiments of the present utility model are given for purposes of illustration and description, and are not exhaustive or limit the present utility model to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. An automatic vacuum nitrogen filling device for a level, comprising a device box body (1) and a nitrogen tank (2), the nitrogen tank (2) is located on one side of the back of the device box body (1), and is characterized in that, An electric control box (3) is installed on the top of the device box body (1). A vacuum pump (7) and a nitrogen booster pump (4) are installed inside the electric control box (3). The nitrogen inlet pipe (5) connected to the inlet end of the nitrogen booster pump (4) passes through the electric control box (3) and is docked with the output end of the nitrogen tank (2). The nitrogen outlet pipe (6) connected to the outlet end of the nitrogen booster pump (4) passes through the electric control box (3) and is inserted into the upper space inside the device box body (1). The inlet pipe (9) of the vacuum pump (7) is inserted into the upper end inside the device box body (1), and the outlet pipe (8) passes through one side of the electric control box (3).

2. The automatic vacuum nitrogen filling device for a level instrument according to claim 1, characterized in that, A central processor (10) and a frequency conversion controller (11) are installed inside the electric control box (3). The frequency conversion controller (11) is electrically connected to the central processor (10), the nitrogen booster pump (4), and the vacuum pump (7).

3. The automatic vacuum nitrogen filling device for a level instrument according to claim 2, characterized in that, A start button (12) and an emergency stop button (13) are installed on the top of the electric control box (3). Both the start button (12) and the emergency stop button (13) are electrically connected to the central processor (10). The start button (12) is green in color, and the emergency stop button (13) is set to be red in color.

4. An automatic vacuum nitrogen filling device for a level, characterized in that, A nitrogen pressure gauge (14) and a vacuum digital display (15) are installed on the top of the electric control box (3). The nitrogen pressure gauge (14) and the vacuum digital display (15) are respectively used to detect the nitrogen pressure and the vacuum degree inside the device box body (1).

5. An automatic vacuum nitrogen filling device for a level, characterized in that, The inlet pipe (9) of the vacuum pump (7) is designed in a two-section manner. One section is docked with the inlet end of the vacuum pump (7), and the other section is connected to the inside of the device box body (1). The interfaces of the two sections of the inlet pipe (9) are docked with the two ends of the air source filter (16). The air source filter (16) is installed on one side of the electric control box (3).

6. The automatic vacuum nitrogen filling device for a level instrument according to claim 4, wherein, A three-color indicator light (17) is installed on the top of the electric control box (3). The three-color indicator light (17) is electrically connected to the nitrogen pressure gauge (14) and the vacuum digital display (15).

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