Liquid level monitoring device for liquid ammonia storage tank

Abstract

The utility model discloses a liquid level monitoring device for a liquid ammonia storage tank, and relates to the technical field of liquid level monitoring devices, the liquid level monitoring device comprises an ammonia tank, a connecting pipe, a float type liquid level sensor and a plug rod, one end of the ammonia tank is provided with a side plate, the inner wall of one side of the side plate is provided with liquid level scales, the upper end of the plug rod is provided with a spotlight corresponding to the side plate, and the connecting pipe is connected with the float type liquid level sensor. A piston is arranged at the lower end of the piston rod, a first pressure cavity and a second pressure cavity are formed in the connecting cylinder, the first pressure cavity and the second pressure cavity communicate with a first valve pipe and a second valve pipe correspondingly, and first valve seats, first valve rings, first valve elements and first valve springs are arranged in the first valve pipe and the second valve pipe correspondingly; a valve seat II, a valve ring II, a valve core II and a valve spring II are arranged at the communication part of the connecting pipe and the ammonia tank; according to the utility model, the pressure compensation mechanism which is redundantly mounted is utilized, so that the problem that the liquid ammonia condition in the ammonia tank cannot be known when the float-type liquid level sensor is damaged is solved, and the liquid level height in the ammonia tank still can be known when the float-type liquid level sensor is damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level monitoring devices, in particular to a liquid level monitoring device for a liquid ammonia storage tank. Background Art

[0002] Liquid ammonia storage tanks are used to store liquid ammonia. Since ammonia is a gas at room temperature, it usually needs to be compressed and cooled to convert it into liquid during storage. The inside of liquid ammonia storage tanks is usually under a certain high pressure. Liquid ammonia storage tanks usually monitor the liquid level through liquid level sensors. Among them, float-type liquid level sensors are a common choice. Through the sensor fixed on the float, when the liquid level rises, the float also rises. The sensor can detect the signal change and thus determine the liquid level height.

[0003] However, the storage temperature of liquid ammonia is usually minus 33.34 degrees Celsius. At this temperature, ammonia is compressed and cooled to convert into liquid form, which is convenient for storage and transportation. This low temperature condition helps to ensure that ammonia remains in a liquid state, thereby providing a safer and more effective storage method. At an extremely low temperature of minus 33.34 degrees Celsius, ammonia will exist in liquid form at this temperature, but if the temperature continues to drop, this will cause the float to be affected by the cold air and no longer be able to move freely, and affect the accuracy of the float-type liquid level sensor, thereby losing the liquid level monitoring inside the liquid ammonia tank. In addition, the liquid level is monitored by the float-type liquid level sensor, and when the float-type liquid level sensor itself fails and is damaged, it will also affect the liquid level monitoring inside the liquid ammonia tank. Therefore, those skilled in the art provide a liquid ammonia storage tank liquid level monitoring device to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a liquid ammonia storage tank liquid level monitoring device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides a liquid ammonia storage tank liquid level monitoring device, comprising an ammonia tank, a connecting pipe, a float type liquid level sensor and a plug rod, wherein one end of the ammonia tank is connected and installed with a connecting pipe, a sliding sleeve is embedded and installed inside the upper end of the connecting pipe, a plug rod is slidably inserted inside the sliding sleeve, one end of the ammonia tank is provided with a side plate, an inner wall of one side of the side plate is provided with a liquid level scale, the upper end of the plug rod is provided with a spotlight corresponding to the side plate, the lower end of the plug rod is provided with a piston slidably installed inside the connecting cylinder, the connecting cylinder is located at the upper and lower sides of the piston and is respectively provided with pressure chamber 1 and pressure chamber 2, the pressure chamber 1 and the pressure chamber 2 are respectively connected with valve pipe 1 and valve pipe 2, the valve pipe 1 and the valve pipe 2 are both provided with valve seat 1, valve ring 1, valve core 1 and valve spring 1, and the connecting pipe and the ammonia tank are connected with valve seat 2, valve ring 2, valve core 2 and valve spring 2.

[0006] Further, the valve ring 1 is connected to the valve spring 1, one end of the valve core 1 is located inside the valve seat 1, the valve ring 2 is connected to the valve spring 2, and one end of the valve core 2 is located inside the valve seat 2;

[0007] Specifically, valve core 1 is supported by valve spring 1 to close the inside of valve seat 1 to prevent the pressure medium inside the connecting tube from flowing back to the outside, and valve core 2 is supported by valve spring 2 to close the inside of valve seat 2 to prevent liquid from entering the inside of pressure chamber 2.

[0008] Furthermore, a shielding cover is provided at the upper end of the connecting pipe and is sleeved on the outside of the spotlight;

[0009] Specifically, the shielding cover blocks external light and at the same time provides physical protection for the spotlight, thereby improving the safety of the spotlight.

[0010] Furthermore, a visual window is provided inside one end of the shielding cover, and one end of the spotlight corresponds to the visual window;

[0011] Specifically, the spotlight can effectively irradiate light onto the side panel through the visual window, and then pass through the light irradiation position and penetrate the position where the light is located at the liquid level scale.

[0012] Furthermore, the outer wall of the float type liquid level sensor is sleeved with a mounting plate which is attached to the outer wall of the upper end of the ammonia tank, and the lower end of the mounting plate is provided with a sealing gasket which is attached to the outer wall of the ammonia tank;

[0013] Specifically, the float type liquid level sensor is fitted with the outer wall of the upper end of the ammonia pipe through the mounting plate, and is installed in a fit with the ammonia tank, and the sealing performance between the mounting plate and the ammonia tank is improved through the sealing gasket.

[0014] Furthermore, the upper end of the ammonia tank is provided with hydraulic rods located at the four corners of the float-type liquid level sensor, the upper end of the hydraulic rod is provided with a rotating seat, an extrusion rod is rotatably installed inside the rotating seat, and the lower end of the extrusion rod is provided with a pressure plate located at the upper end of the mounting plate;

[0015] Specifically, the extrusion rod rotates at the telescopic end of the upper end of the hydraulic rod through the rotating seat, driving the pressure plate to apply pressure to the mounting plate. Through the rotating support of the rotating seat, the extrusion rod can drive the pressure plate to rotate and move out of the upper end of the mounting plate, ensuring that the mounting plate drives the float-type liquid level sensor to be taken out of the ammonia tank.

[0016] Compared with the prior art, the utility model has the following beneficial effects: a float type liquid level sensor is arranged inside the upper end of the ammonia tank, and the sensor detects the signal change by following the movement of the liquid level, thereby determining the liquid level height;

[0017] At the same time, a connecting pipe is installed on one side of the ammonia tank, and the connecting pipe is connected to valve pipe one and valve pipe two. Compressed liquid ammonia is added to the space above and below the piston. After the liquid ammonia in the ammonia tank is discharged, the internal pressure will also change. The pressure inside pressure chamber two is compensated to the ammonia tank, and the piston drives the spotlight to move. By shining the spotlight on the position of the liquid level scale, the liquid level of the liquid ammonia inside the ammonia tank and the usage of the liquid ammonia inside the ammonia tank can be understood. When the float-type liquid level sensor fails, the redundant setting can still realize the monitoring of the internal liquid level of the ammonia tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0019] Figure 2 This is a top view of the three-dimensional structure of the float type liquid level sensor in the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the connecting pipe in the utility model from a side view;

[0021] Figure 4 It is a schematic diagram of a partial side cross-sectional three-dimensional structure of the connecting pipe in the utility model;

[0022] Figure 5 It is a schematic diagram of a main cross-sectional three-dimensional structure of the valve tube in the utility model.

[0023] In the figure: 1. Ammonia tank; 2. Connecting pipe; 3. Side plate; 4. Float-type liquid level sensor; 5. Shielding cover; 6. Hydraulic rod; 7. Mounting plate; 8. Rotating seat; 9. Pressure plate; 10. Extrusion rod; 11. Liquid level scale; 12. Spotlight; 13. Visual window; 14. Valve pipe one; 15. Valve pipe two; 16. Valve seat two; 17. Valve spring two; 18. Valve ring two; 19. Valve core two; 20. Plug rod; 21. Piston; 22. Pressure chamber one; 23. Pressure chamber two; 24. Sleeve; 25. Valve seat one; 26. Valve core one; 27. Valve spring one; 28. Valve ring one. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 , the utility model provides a technical solution:

[0026] Embodiment 1:

[0027] A liquid level monitoring device for a liquid ammonia storage tank comprises an ammonia tank 1, a connecting pipe 2, a float type liquid level sensor 4 and a plug rod 20. One end of the ammonia tank 1 is connected and installed with the connecting pipe 2, the upper end of the connecting pipe 2 is embedded with a sliding sleeve 24, the sliding sleeve 24 is slidably inserted with the plug rod 20, one end of the ammonia tank 1 is provided with a side plate 3, the inner wall of one side of the side plate 3 is provided with a liquid level scale 11, the upper end of the plug rod 20 is provided with a spotlight 12 corresponding to the side plate 3, and the lower end of the plug rod 20 is provided with a The piston 21 inside the connecting tube, the connecting tube is located on the upper and lower sides of the piston 21, and the pressure chamber 1 22 and the pressure chamber 2 23 are respectively arranged inside, the pressure chamber 1 22 and the pressure chamber 2 23 are respectively connected with the valve pipe 1 14 and the valve pipe 2 15, and the valve seat 1 25, valve ring 1 28, valve core 1 26 and valve spring 1 27 are arranged inside the valve pipe 14 and the valve pipe 2 15, and the valve seat 2 16, valve ring 2 18, valve core 2 19 and valve spring 2 17 are arranged at the connection between the connecting pipe 2 and the ammonia tank 1.

[0028] The valve ring 1 28 is connected to the valve spring 1 27, one end of the valve core 1 26 is located inside the valve seat 1 25, the valve ring 2 18 is connected to the valve spring 2 17, one end of the valve core 2 19 is located inside the valve seat 2 16;

[0029] The upper end of the connecting tube 2 is provided with a shielding cover 5 which is sleeved on the outside of the spotlight 12;

[0030] A viewing window 13 is provided inside one end of the shielding cover 5, and one end of the spotlight 12 corresponds to the viewing window 13;

[0031] Through the mechanism of pressure compensation, the pressure of the connecting rod and the liquid ammonia inside the ammonia tank 1 is adjusted to keep the pressure in the pressure chamber 1 22, the pressure chamber 2 23 and the inside of the ammonia tank 1 balanced. When the internal pressure of the ammonia tank 1 decreases, the pressure inside the ammonia tank 1 can be compensated in time, and then the height of the spotlight 12 can be changed. When the piston 21 moves, it drives the plug rod 20 and the spotlight 12 to move, so as to accurately detect the height of the liquid ammonia level in the ammonia tank 1. Even if the float-type liquid level sensor 4 is damaged, the liquid ammonia in the ammonia tank 1 can still be effectively understood. The redundant design improves the stability of the use of the ammonia tank 1.

[0032] Embodiment 2:

[0033] The outer wall of the float type liquid level sensor 4 is sleeved with a mounting plate 7 which is in contact with the outer wall of the upper end of the ammonia tank 1, and the lower end of the mounting plate 7 is provided with a sealing gasket which is in contact with the outer wall of the ammonia tank 1;

[0034] The upper end of the ammonia tank 1 is provided with a hydraulic rod 6 located at the four corners of the float type liquid level sensor 4, the upper end of the hydraulic rod 6 is provided with a rotating seat 8, an extrusion rod 10 is rotatably installed inside the rotating seat 8, and the lower end of the extrusion rod 10 is provided with a pressing plate 9 located at the upper end of the mounting plate 7;

[0035] In this embodiment, a low-temperature-resistant and corrosion-resistant sealing gasket and mounting plate 7 are used, which can maintain elasticity and stability at extremely low temperatures to prevent ammonia leakage. The float-type sensor is in good contact with the inside of the ammonia tank 1 through the rotating seat 8, the pressure rod and other components, making the installation of the float-type liquid level sensor 4 inside the ammonia tank 1 easier, and can also be quickly maintained and replaced when damaged.

[0036] Working principle: An installation port is provided inside the upper end of the ammonia tank 1, and the installation port is used for installing the float-type liquid level sensor 4. When the float-type liquid level sensor 4 is installed, the float is plugged into the inside of the ammonia tank 1, and the mounting plate 7 is attached to the outer wall of the ammonia tank 1 through a sealing gasket to shield the installation port. The extrusion rod 10 is rotated by the rotating seat 8, and the extrusion rod 10 drives the pressure plate 9 to rotate onto the mounting plate 7. The hydraulic rod 6 drives the extrusion rod 10 to descend, and the mounting plate 7 is longitudinally pressed to conveniently install the float-type liquid level sensor 4. During the installation process, the twisting of threaded parts or time-consuming and laborious welding is avoided. When the float-type liquid level sensor 4 is damaged, it can be conveniently maintained and replaced.

[0037] When the ammonia tank 1 is in use, the valve pipe 14 is connected through the pressure equipment, and the pressure medium acts on the valve core 26. The valve core 26 is forced to squeeze the valve spring 27, and the valve spring 27 is forced to shrink, the valve seat 25 opens, and the pressure medium is transported to the inside of the pressure chamber 22. At the same time, the pressurized liquid ammonia is transported into the inside of the pressure chamber 23 through the valve pipe 215. The pressure inside the pressure chamber 122 and the pressure chamber 23 is adjusted, the position of the piston 21 is determined, and the position of the spotlight 12 on the upper end of the plug rod 20 is adjusted. The light irradiated by the spotlight 12 corresponds to the liquid level scale 11 and is consistent with the liquid level detected by the float-type liquid level sensor 4. When the liquid ammonia in the ammonia tank 1 is discharged, the discharge of liquid will cause the volume inside the storage tank to decrease, thereby causing the change of the internal pressure. After the liquid ammonia storage tank discharges a part of the liquid ammonia, the pressure of the internal space will drop. Under normal circumstances, the pressure chamber 12, the pressure chamber 23 and the ammonia tank 1 are The pressure inside the ammonia tank 1 remains stable. When the internal pressure of the ammonia tank 1 drops, the pressure inside the pressure chamber 1 22 acts on the piston 21, and the pressure of the piston 21 acts on the inside of the pressure chamber 23. The pressure inside the pressure chamber 23 acts on the valve core 2 19, and the valve spring 2 17 is forced to shrink, the valve core 2 19 moves, and the valve seat 2 16 is briefly opened. The pressurized liquid ammonia inside the pressure chamber 23 enters the ammonia tank 1. After the internal pressure of the ammonia tank 1 and the pressure chamber 23 are balanced, the valve core 2 19 cannot be opened by the pressure to cause the valve seat to open. When the piston 21 moves, it drives the plug rod 20 to move longitudinally, and then drives the spotlight 12 to move. The position of the spotlight 12 on the liquid level scale 11 changes, and then the use of the liquid ammonia in the ammonia tank 1 is understood, and the liquid level height of the liquid ammonia is understood. When the float-type liquid level sensor 4 is damaged during use, the liquid ammonia situation inside the ammonia tank 1 can be understood by observing the liquid level scale 11.

Claims

1. A liquid ammonia storage tank liquid level monitoring device, comprising an ammonia tank (1), a connecting pipe (2), a float type liquid level sensor (4) and a plug rod (20), characterized in that: One end of the ammonia tank (1) is connected to a connecting pipe (2), a sliding sleeve (24) is embedded in the upper end of the connecting pipe (2), a plug rod (20) is slidably inserted in the sliding sleeve (24), one end of the ammonia tank (1) is provided with a side plate (3), an inner wall of one side of the side plate (3) is provided with a liquid level scale (11), the upper end of the plug rod (20) is provided with a spotlight (12) corresponding to the side plate (3), and the lower end of the plug rod (20) is provided with a piston (21) slidably installed in the interior of a connecting tube, the connecting tube is located at the piston ( A pressure chamber 1 (22) and a pressure chamber 2 (23) are respectively arranged inside the upper and lower sides of the connecting pipe (21); the pressure chamber 1 (22) and the pressure chamber 2 (23) are respectively connected to a valve pipe 1 (14) and a valve pipe 2 (15); the valve pipe 1 (14) and the valve pipe 2 (15) are both provided with a valve seat 1 (25), a valve ring 1 (28), a valve core 1 (26) and a valve spring 1 (27); the connecting pipe (2) and the ammonia tank (1) are provided with a valve seat 2 (16), a valve ring 2 (18), a valve core 2 (19) and a valve spring 2 (17).

2. A liquid ammonia storage tank liquid level monitoring device as claimed in claim 1, characterized in that: The valve ring 1 (28) is connected to the valve spring 1 (27), one end of the valve core 1 (26) is located inside the valve seat 1 (25), the valve ring 2 (18) is connected to the valve spring 2 (17), and one end of the valve core 2 (19) is located inside the valve seat 2 (16).

3. A liquid ammonia storage tank liquid level monitoring device as claimed in claim 1, characterized in that: The upper end of the connecting tube (2) is provided with a shielding cover (5) which is sleeved on the outside of the spotlight (12).

4. A liquid ammonia storage tank liquid level monitoring device as claimed in claim 3, characterized in that: A visual window (13) is provided inside one end of the shielding cover (5), and one end of the spotlight (12) corresponds to the visual window (13).

5. The liquid level monitoring device for a liquid ammonia storage tank according to claim 1, characterized in that: The outer wall of the float type liquid level sensor (4) is sleeved with a mounting plate (7) which is in contact with the outer wall of the upper end of the ammonia tank (1), and the lower end of the mounting plate (7) is provided with a sealing gasket which is in contact with the outer wall of the ammonia tank (1).

6. A liquid ammonia storage tank liquid level monitoring device as claimed in claim 5, characterized in that: The upper end of the ammonia tank (1) is provided with a hydraulic rod (6) located at the four corners of the float-type liquid level sensor (4), the upper end of the hydraulic rod (6) is provided with a rotating seat (8), an extrusion rod (10) is rotatably mounted inside the rotating seat (8), and the lower end of the extrusion rod (10) is provided with a pressing plate (9) located at the upper end of the mounting plate (7).

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