Differential pressure type liquid level transmitter

Abstract

The utility model relates to the technical field of liquid level transmitters, and discloses a differential pressure type liquid level transmitter which comprises a shell, a gauge head front cover is connected inside the left side of the shell through threads, a gauge cover, a gauge head, a liquid crystal display screen and an electronic circuit board are arranged inside the gauge head front cover, and a gauge head rear cover is connected on the right side of the shell through threads. A terminal block is arranged in the meter head rear cover, a meter head cavity is formed in the shell, the lower portion of the shell is connected with a sensor through threads, and the two sides of the sensor are movably connected with two clamping plates through first bolts. According to the liquid level meter, the design of the sensor is optimized, the internal structure is improved, and high-precision and stable liquid level measurement is achieved; medium pressure is transmitted to the sensor through the welded pipe joint, the sensor generates electric signals, the electric signals are converted into standard signals to be output after being processed by the electronic circuit board, meanwhile, liquid level information is displayed on the liquid crystal display screen in real time, and the liquid level sensor is easy to install and maintain, suitable for flammable and explosive environments and capable of improving operation safety.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level transmitters, and specifically relates to a differential pressure type liquid level transmitter. Background Technique

[0002] A differential pressure type liquid level transmitter is an instrument that measures the liquid level by using the principle that the hydrostatic pressure is proportional to the liquid level height. It measures the pressure difference between two points by installing a pressure sensor at the bottom and top of the liquid respectively to calculate the liquid level height. This technology is widely used in liquid level monitoring in fields such as petroleum, chemical industry, and water conservancy, and is valued for its advantages such as high precision, good stability, and convenient maintenance. With the development of industrial automation, the requirements for the accuracy and reliability of liquid level measurement are getting higher and higher, and the technology of differential pressure type liquid level transmitters is also constantly progressing, including the development of digitalization and intelligence, as well as the application of new materials, etc., to meet the usage requirements under more complex working conditions. In the prior art, the measurement accuracy is low, the stability is poor, and the installation and maintenance are complex, which need to be improved. For this reason, we have proposed a differential pressure type liquid level transmitter. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] Aiming at the deficiencies of the prior art, the utility model provides a differential pressure type liquid level transmitter, which solves the above problems.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the utility model provides the following technical solution: A differential pressure type liquid level transmitter includes a housing. The left side inside of the housing is threadedly connected with a front cover of the meter head, and inside the front cover of the meter head, there are a meter cover, a meter head, a liquid crystal display screen, and an electronic circuit board. The right side of the housing is threadedly connected with a rear cover of the meter head, and inside the rear cover of the meter head, there is a terminal block. One side surface of the rear cover of the meter head is closed. Inside the housing, there is a meter head chamber. The lower part of the housing is threadedly connected with a sensor, and two clamping plates are movably connected to both sides of the sensor through bolts I.

[0007] Preferably, sealing rings are provided at the threaded connection parts inside both sides of the housing. An outer shell rotation positioning screw is provided on the circumferential outer surface of the lower part of the housing. A metal blanking cover and an explosion-proof joint are provided on the circumferential outer surface of the upper part of the housing, and the metal blanking cover and the explosion-proof joint are on the same axis and are threadedly connected to the housing.

[0008] Preferably, a terminal block is fixed on the inner wall of the housing, and an electronic circuit board is connected to the inner wall of the housing through screws. Anti-drop protrusions are provided at one end of the front cover of the meter head and the rear cover of the meter head.

[0009] Preferably, two modular screws are connected to the upper part of the sensor by threads. The two modular screws are located inside the meter head chamber. The lower end of the sensor is circular, and a sealing ring is provided at the contact area between the sensor and the clamping plate.

[0010] Preferably, a welded pipe joint assembly is connected to one side of the clamping plate by threads. The outer circumferential surface of the welded pipe joint assembly has threads. A drain valve is connected to the other side of the clamping plate by threads. A drain valve screw is connected to the inside of the drain valve by threads. Four holes are provided on the front and back sides of the clamping plate. The two clamping plates are movably connected by bolt one and nuts.

[0011] Preferably, bolts two are provided on both sides of the welded pipe joint assembly. The bolts two are connected to the clamping plate by threads.

[0012] Preferably, the upper part of the sensor has threads, and the upper part of the sensor is circular.

[0013] (III) Advantageous Effects

[0014] Compared with the prior art, the utility model provides a differential pressure type liquid level transmitter, which has the following advantageous effects:

[0015] 1. For the differential pressure type liquid level transmitter, by optimizing the sensor design and improving the internal structure, the differential pressure type liquid level transmitter can measure the liquid level height more accurately, reduce errors, and maintain stable output, thereby improving the reliability and efficiency of the entire system.

[0016] 2. For the differential pressure type liquid level transmitter, by adopting threaded connection and modular design, the differential pressure type liquid level transmitter is more convenient and fast to install and maintain. In addition, through the detailed design such as setting anti-drop protrusions and sealing rings, the durability and protection of the product are enhanced, and the maintenance cost is reduced.

[0017] 3. For the differential pressure type liquid level transmitter, through the design of the explosion-proof joint, it can be safely used in flammable and explosive environments. At the same time, by setting safety measures such as drain valves, the operation safety is improved, and potential risks are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic cross-sectional structure diagram of the utility model;

[0019] Figure 2 is an isometric view schematic diagram of the utility model;

[0020] Figure 3 is a side view schematic diagram of the utility model;

[0021] Figure 4 is a front view schematic diagram of the utility model.

[0022] In the figure: 1. Terminal block; 2. Module screw; 3. Bolt 1; 4. Drain valve screw; 5. Drain valve; 6. Sensor; 7. Welded pipe joint assembly; 8. Bolt 2; 9. Splint; 10. Meter head; 11. Meter cover; 12. Sealing ring; 13. Front cover of meter head; 14. Liquid crystal display screen; 15. Electronic circuit board; 16. Meter head chamber; 17. Rear cover of meter head; 18. Shell rotation positioning screw; 19. Metal blanking cover; 20. Shell; 21. Explosion-proof joint; 22. Nut. Detailed implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to FIGS. / *1-4* / . A differential pressure type liquid level transmitter includes a shell 20. The left side inside of the shell 20 is threadedly connected with a front cover 13 of the meter head. Inside the front cover 13 of the meter head, there are a meter cover 11, a meter head 10, a liquid crystal display screen 14 and an electronic circuit board 15. The right side of the shell 20 is threadedly connected with a rear cover 17 of the meter head. Inside the rear cover 17 of the meter head, there is a terminal block 1. One side surface of the rear cover 17 of the meter head is closed. Inside the shell 20, there is a meter head chamber 16. The lower part of the shell 20 is threadedly connected with a sensor 6. The two sides of the sensor 6 are movably connected with two splints 9 through bolts 1.

[0025] Further, sealing rings 12 are provided at the threaded connection parts inside the two sides of the shell 20. An outer shell rotation positioning screw 18 is provided on the outer circumferential surface of the lower part of the shell 20. A metal blanking cover 19 and an explosion-proof joint 21 are provided on the outer circumferential surface of the upper part of the shell 20. And the metal blanking cover 19 and the explosion-proof joint 21 are on the same axis. The metal blanking cover 19 and the explosion-proof joint 21 are threadedly connected with the shell 20.

[0026] Further, a terminal block 1 is fixed on the inner wall of the shell 20, and an electronic circuit board 15 is connected to the inner wall of the shell 20 through screws. Anti-drop protrusions are provided at one ends of the front cover 13 and the rear cover 17 of the meter head.

[0027] Further, two module screws 2 are threadedly connected above the sensor 6. The two module screws 2 are inside the meter head chamber 16. The lower end of the sensor 6 is circular. A sealing ring 12 is provided at the contact part between the sensor 6 and the splint 9.

[0028] Further, one side of the clamping plate 9 is threadedly connected with a welded pipe joint assembly 7. The circumferential outer surface of the welded pipe joint assembly 7 is provided with threads. The other side of the clamping plate 9 is threadedly connected with a drain valve 5. The inside of the drain valve 5 is threadedly connected with a drain valve screw 4. Four holes are provided on the front and rear sides of the clamping plate 9. The two clamping plates 9 are movably connected by a bolt 3 and a nut 22.

[0029] Further, bolts 8 are provided on both sides of the welded pipe joint assembly 7. The bolts 8 are connected to the clamping plate 9 by threads.

[0030] Further, threads are provided above the sensor 6, and the upper part of the sensor 6 is circular.

[0031] Working principle: For the differential pressure type liquid level transmitter of the present utility model, the front cover of the meter head 13 is threadedly connected to the inside of the left side of the housing 20. Inside the front cover of the meter head 13, there are a meter cover 11, a meter head 10, a liquid crystal display screen 14 and an electronic circuit board 15. The rear cover of the meter head 17 is threadedly connected to the right side of the housing 20. Inside the rear cover of the meter head 17, there is a terminal block 1. A meter head chamber 16 is provided inside the housing 20. The sensor 6 is threadedly connected to the lower part of the housing 20. The two clamping plates 9 are movably connected to both sides of the sensor 6 by bolts 3. During installation, first, the front cover of the meter head 13 and the rear cover of the meter head 17 are connected to the left and right sides of the housing 20 by threads. Then, the meter cover 11, the meter head 10, the liquid crystal display screen 14 and the electronic circuit board 15 are installed inside the front cover of the meter head 13. Then, the sensor 6 is connected to the lower part of the housing 20 by threads, and the two clamping plates 9 are movably connected to both sides of the sensor 6 by bolts 3. Finally, the welded pipe joint assembly 7 is connected to one side of the clamping plate 9 by threads, and the drain valve 5 is connected to the other side of the clamping plate 9 by threads. During operation, the medium pressure is transmitted to the sensor 6 through the welded pipe joint assembly 7. The sensor 6 generates an electrical signal according to the pressure change. This electrical signal is processed by the electronic circuit board 15 and then converted into a standard signal proportional to the liquid level height for output. At the same time, the liquid crystal display screen 14 can display the liquid level height and other relevant information in real time. If it is necessary to clean or replace the sensor 6, the bolts 3 and the nuts 22 can be loosened, and the clamping plate 9 and the sensor 6 can be disassembled for maintenance. In addition, the position of the housing 20 can be adjusted by rotating the positioning screw 18 of the outer shell to meet the requirements of different installation occasions. The design of the metal blank cover 19 and the explosion-proof joint 21 enables the differential pressure type liquid level transmitter to be safely used in flammable and explosive environments.

[0032] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A differential pressure liquid level transmitter, comprising a housing (20), characterized in that: The left side of the housing (20) is connected to a meter front cover (13) by a thread, and a meter cover (11), a meter (10), a liquid crystal display (14) and an electronic circuit board (15) are provided inside the meter front cover (13). The right side of the housing (20) is connected to a meter rear cover (17) by a thread, and a terminal block (1) is provided inside the meter rear cover (17). One side surface of the meter rear cover (17) is closed, and a meter chamber (16) is provided inside the housing (20). A sensor (6) is connected to the bottom of the housing (20) by a thread, and two clamping plates (9) are movably connected on both sides of the sensor (6) by bolts (3).

2. A differential pressure liquid level transmitter according to claim 1, characterized in that: Sealing rings (12) are provided at the internal threaded connections on both sides of the shell (20), a shell rotation positioning screw (18) is provided on the lower circumferential outer surface of the shell (20), and a metal cover (19) and an explosion-proof joint (21) are provided on the upper circumferential outer surface of the shell (20), and the metal cover (19) and the explosion-proof joint (21) are on the same axis, and the metal cover (19) and the explosion-proof joint (21) are threadedly connected to the shell (20).

3. The differential pressure liquid level transmitter according to claim 1, characterized in that: A terminal block (1) is fixed on the inner wall of the housing (20), and an electronic circuit board (15) is connected to the inner wall of the housing (20) via screws. One end of the meter head front cover (13) and the meter head rear cover (17) is provided with an anti-drop protrusion.

4. The differential pressure liquid level transmitter according to claim 1, characterized in that: The sensor (6) is connected to two module screws (2) via threads above. The two module screws (2) are located inside the meter head chamber (16). The lower end of the sensor (6) is circular. A sealing ring (12) is provided at the contact point between the sensor (6) and the splint (9).

5. The differential pressure liquid level transmitter according to claim 1, characterized in that: One side of the clamping plate (9) is connected to a welding pipe joint assembly (7) through a thread, and the outer circumferential surface of the welding pipe joint assembly (7) is provided with a thread. The other side of the clamping plate (9) is connected to a discharge valve (5) through a thread, and the inside of the discharge valve (5) is connected to a discharge valve screw (4) through a thread. Four holes are provided on the front and rear sides of the clamping plate (9), and the two clamping plates (9) are movably connected through a bolt (3) and a nut (22).

6. The differential pressure liquid level transmitter according to claim 5, characterized in that: Bolts (8) are provided on both sides of the welded pipe joint assembly (7), and the bolts (8) are connected to the clamping plate (9) through threads.

7. The differential pressure liquid level transmitter according to claim 1, characterized in that: The upper portion of the sensor (6) is provided with a screw thread, and the upper portion of the sensor (6) is circular.

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