Ultrasonic liquid level measuring device capable of resisting water vapor interference

Abstract

The utility model belongs to the technical field of ultrasonic liquid level meters, and discloses a water vapor interference resistant ultrasonic liquid level measuring device which comprises a liquid level meter body and a blowing cover, a channel used for containing a probe of the liquid level meter body is arranged in the blowing cover, and the liquid level meter body is detachably connected with the blowing cover through a fixing piece. A vent hole used for being connected with external air supply equipment is formed in the top of the fixing part, a cavity communicated with the vent hole is further formed in the air blowing cover, the cavity is used for guiding air input from the vent hole to the channel and outputting the air towards the bottom of the probe, and a connecting part connected with external equipment to be detected is arranged on the air blowing cover. The problem that the measurement result is affected by water vapor can be solved, the structure is simple, installation is rapid and convenient, and no pipeline needs to be arranged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ultrasonic liquid level meter, concretely is an ultrasonic liquid level measuring device of water vapor interference resistance. BACKGROUND

[0002] The ultrasonic liquid level meter is a kind of instrument for measuring liquid height or liquid level using ultrasonic principle. Its main working principle is to emit ultrasonic signal to liquid surface, then receive the signal reflected back, and calculate the distance from liquid surface to sensor according to the time of sound wave propagation.

[0003] In flue gas desulfurization and urea hydrolysis process system, the liquid level in pit or slurry tank needs to be measured. Among them, the cost of using radar liquid level meter is higher, and the ultrasonic liquid level meter with better economy is usually used. Water vapor generated by medium in the tank will condense into water droplets on the surface of liquid level meter probe, which will interfere with the measurement accuracy of liquid level meter.

[0004] In order to solve this problem, CN216246675U discloses an ultrasonic liquid level meter air purge device. Including ultrasonic liquid level meter, the ultrasonic liquid level meter is connected with the fixed seat, the probe of the ultrasonic liquid level meter is located below the fixed seat;The side of the ultrasonic liquid level meter is provided with a gas supply device, the gas supply device is connected with a gas supply pipeline, the gas supply pipeline is provided with a first blowing pipeline and a second blowing pipeline away from the gas supply device, one end of the gas outlet of the first blowing pipeline passes through the fixed seat and is close to the probe of the ultrasonic liquid level meter, one end of the gas outlet of the second blowing pipeline passes through the fixed seat and is located above the measured liquid.

[0005] The above technical solution can solve the problem of measurement value fluctuation caused by high temperature and high humidity environment, ensure the reliability and stability of measurement, and solve the problems of frequent start and stop of equipment, high failure rate and other problems caused by measurement error. Although the above technology can solve the problem of water vapor affecting measurement results, it cannot prevent the contact between water vapor or other corrosive substances in the tank and the first blowing pipeline and the second blowing pipeline during the measurement process, especially in a sealed reaction environment. The first blowing pipeline and the second blowing pipeline are placed in the reaction environment, and the orientation of the first blowing pipeline and the second blowing pipeline also needs to be arranged. UTILITY MODEL CONTENT

[0006] The purpose of the present application is to solve the above problems, and an ultrasonic liquid level measuring device is provided, which can not only solve the problem of water vapor affecting measurement results, but also has simple structure, quick and convenient installation, and does not need to arrange pipeline.

[0007] In order to achieve the above purpose, the present application provides the following technical scheme:

[0008] The utility model provides an anti-humidity interference ultrasonic liquid level measuring device, including liquid level meter main part, blow cover, be equipped with the passageway for containing the probe of liquid level meter main part in blow cover, liquid level meter main part is connected with blow cover in the detachable mode through a fixed part, the top of fixed part is equipped with the air hole for connecting with the air supply equipment of external, still be equipped with the chamber with the air hole intercommunication in blow cover, the chamber is used for guiding the gas input from the air hole to the passageway and exports towards the bottom of probe, and blow cover is equipped with the connecting part with the device to be measured of external.

[0009] Preferably, the horizontal cross section of the chamber is circular, the gas outlet end of the chamber has multiple, and is arranged around the probe circumference of the liquid level meter main part.

[0010] Preferably, the top of the chamber is open, the top of the blow cover is provided with coaxially arranged first and second sealing components, a sealing area is formed between the first and second sealing components, and the inlet of the chamber is located in the sealing area.

[0011] Preferably, the fixed part includes a connecting plate connected with the liquid level meter main part, a connecting column located on the connecting plate, the air hole is vertically arranged on the connecting plate, the outer diameter of the connecting column matches the passageway, and the connecting plate is detachably connected with the blow cover.

[0012] Preferably, the blow cover includes a cover body and a circular plate connected to the cover body, the fixed part is detachably connected with the circular plate, the passageway and the chamber are both in the cover body, and the connecting part is located on the circular plate.

[0013] Preferably, the cover body and the circular plate are integrally formed.

[0014] Compared with the prior art, the application has the following beneficial effects:

[0015] 1. The application can not only solve the problem of water vapor affecting the measurement result, but also has simple structure, fewer parts, and fast and convenient installation.

[0016] 2. The air hole is arranged at the top of the fixed part, so that the air supply equipment only needs to be connected at the top of the fixed part to work, without the need for pipeline arrangement, especially in a sealed measurement environment, the pipeline is arranged outside the sealed environment to prevent water vapor or other corrosive substances from contacting the pipeline, and in an environment without the need for water vapor removal, only other plugging components are needed to plug the air pipe.

[0017] 3. The horizontal cross section of the chamber is circular, and the top is open, so that the air hole does not need to be aligned during installation, improving the convenience of installation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structure diagram of the anti-humidity interference ultrasonic liquid level measuring device of example 1.

[0019] Wherein, each reference number is as follows:

[0020] Liquid level meter body 1; blow cover 2; fixing part 3; cover body 21; circular plate 22; connecting plate 31; connecting column 32; channel 211; cavity 212; connecting part 221; first sealing assembly 222; second sealing assembly 223; air hole 311; gas outlet end 2121. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] Embodiment 1

[0023] Reference Figure 1 An ultrasonic liquid level measuring device resistant to water vapor interference includes a liquid level meter body 1 and a blow cover 2. The blow cover 2 is provided with a channel 211 for accommodating a probe of the liquid level meter body 1. The liquid level meter body 1 is connected to the blow cover 2 in a detachable manner through a fixing part 3. The top of the fixing part 3 is provided with an air hole 311 for connecting to an external air supply device. The blow cover 2 is further provided with a cavity 212 in communication with the air hole 311. The cavity 212 is used to guide the gas input from the air hole 311 to the channel 211 and output towards the bottom of the probe. The blow cover 2 is provided with a connecting part 221 for connecting to an external device to be measured.

[0024] In this design, the operator only needs to connect the liquid level meter body 1 to the blow cover 2 through the fixing part 3 to complete the assembly of the measuring device, and then connect the blow cover 2 to the external device to be measured to complete the installation of the measuring device. In an environment where water vapor needs to be removed, the operator connects an external air supply device to the air hole 311 through an air pipe and turns on the air supply device. The air supply device sends gas into the cavity 212 through the air hole 311, which is guided by the cavity 212 and output towards the bottom of the probe. Not only can the water droplets on the probe be blown away, but also the water vapor can be blown away to prevent the water vapor from affecting the measurement results. In an environment where water vapor does not need to be removed, the operator can block the air hole 311 with a blocking part.

[0025] In this way, not only can the problem of water vapor affecting the measurement results be solved, but also the structure is simple, the installation is fast and convenient, and no pipeline needs to be arranged. Especially in a sealed measurement environment, the pipeline is arranged outside the sealed environment to prevent water vapor or other corrosive substances from contacting the pipeline.

[0026] Further, the horizontal section of the chamber 212 is circular, and the gas outlet ends 2121 of the chamber 212 are arranged in a circumferential array around the probe of the liquid level meter body 1.

[0027] In actual use, by adopting the chamber 212 with a circular horizontal section and the circumferential array of the gas outlet ends 2121 around the probe, multi-angle blowing can be provided, and blind blowing area can be avoided, thereby ensuring the accuracy of measurement.

[0028] Preferably, the top of the chamber 212 is open, the top of the blowing cover 2 is provided with coaxially arranged first and second sealing assemblies 222 and 223, a sealing area is formed between the first and second sealing assemblies 222 and 223, and the inlet of the chamber 212 is located in the sealing area.

[0029] Specifically, by adopting the chamber 212 with an open top, alignment is not required when connecting the fixing member 3 and the blowing cover 2. As long as the fixing member 3 and the blowing cover 2 are assembled, the vent hole 311 and the chamber 212 are automatically connected; and the first and second sealing assemblies 222 and 223 can prevent gas leakage.

[0030] In this embodiment, the fixing member 3 includes a connecting plate 31 connected to the liquid level meter body 1, a connecting column 32 located on the connecting plate 31, and the vent hole 311 vertically arranged on the connecting plate 31. The outer diameter of the connecting column 32 matches the channel 211, and the connecting plate 31 is detachably connected to the blowing cover 2.

[0031] During installation, the connecting column 32 can provide a positioning function for the connecting plate 31 and the blowing cover 2. Specifically, after the connecting column 32 is inserted into the channel 211, the vent hole 311 is aligned with the chamber 212.

[0032] In the preferred embodiment, the connecting plate 31 and the blowing cover 2 are connected by bolts and nuts.

[0033] In other embodiments, the connecting plate 31 and the blowing cover 2 are connected by threads.

[0034] Both methods can achieve detachable connection, and the operator can choose to use the first or second method or other methods according to actual conditions.

[0035] Preferably, the blowing cover 2 includes a cover body 21 and a circular plate 22 connected to the cover body 21, and the fixing member 3 is detachably connected to the circular plate 22. The channel 211 and the chamber 212 are located in the cover body 21, and the connecting portion 221 is located on the circular plate 22.

[0036] In the preferred embodiment, the circular plate 22 matches the flange of the to-be-tested device of the external equipment, so the connection between the circular plate 22 and the to-be-tested device can be understood as the connection of the flange, which is very simple to install and disassemble and has good stability. By arranging the connection points of the fixing member 3, the blow cover 2 and the to-be-tested device of the external equipment on the circular plate 22, the installation and docking of various components become more simple and efficient, and the number of components can be reduced.

[0037] Preferably, the cover body 21 and the circular plate 22 are integrally formed. The integral forming eliminates the connection points and interfaces of the cover body 21 and the circular plate 22, reduces the potential risks of looseness, water leakage and failure, and makes the overall structure more reliable.

[0038] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A water vapor interference resistant ultrasonic liquid level measuring device comprising a liquid level meter body, a blow cover, characterized in that, The blowing cover is internally provided with a channel for accommodating a probe of the liquid level meter body, the liquid level meter body is detachably connected with the blowing cover through a fixing member, a top of the fixing member is provided with a vent hole for connecting with an external air supply device, the blowing cover is further internally provided with a chamber in communication with the vent hole, the chamber is used for guiding the gas input from the vent hole to the channel and outputting towards a bottom of the probe, the blowing cover is provided with a connecting part for connecting with an external device to be measured.

2. The water vapor proof ultrasonic liquid level measuring device according to claim 1, characterized in that The horizontal section of the chamber is circular, the chamber has multiple gas outlet ends, and the gas outlet ends are arranged in a circular array around the probe of the liquid level meter body.

3. The water vapor proof ultrasonic liquid level measuring device according to claim 2, characterized in that The top of the chamber is open, the top of the blowing cover is provided with a first sealing assembly and a second sealing assembly arranged coaxially, a sealing area is formed between the first sealing assembly and the second sealing assembly, and the inlet of the chamber is located in the sealing area.

4. The water vapor proof ultrasonic liquid level measuring apparatus according to claim 1, characterized in that The fixing member includes a connecting plate connected with the liquid level meter body and a connecting column located on the connecting plate, the vent hole is vertically arranged on the connecting plate, an outer diameter of the connecting column matches the channel, and the connecting plate is detachably connected with the blowing cover.

5. The water vapor proof ultrasonic liquid level measuring apparatus according to claim 1, wherein, The blowing cover includes a cover body and a circular plate connected to the cover body, the fixing member is detachably connected with the circular plate, the channel and the chamber are both located in the cover body, and the connecting part is located on the circular plate.

6. The water vapor proof ultrasonic liquid level measuring device according to claim 5, characterized in that The cover body and the circular plate are integrally formed.

Images