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CN-121977672-A - High-temperature-resistant radar liquid level gauge adopting quartz material lens

CN121977672ACN 121977672 ACN121977672 ACN 121977672ACN-121977672-A

Abstract

The invention relates to the field of liquid level meters, in particular to a high-temperature-resistant radar liquid level meter adopting a quartz material lens. The device comprises a shell arranged at the top of an object/liquid tank to be measured, wherein the shell comprises a first shell, a second shell and a third shell which are sequentially connected from bottom to top, an inner shell is arranged in the third shell, an upper cover is arranged at the upper end of the third shell, a mounting flange is arranged at the bottom of the first shell, a quartz lens is arranged at the bottom of the first shell in a penetrating and pressing mode, a horn antenna is arranged above the quartz lens, the horn antenna is connected with a radio frequency board positioned in the inner shell through a waveguide tube penetrating through the inside of the second shell, a radio frequency board, a main control board, a signal board and a power board are sequentially arranged in the inner shell from bottom to top, and a display screen is arranged at the joint of the upper cover and the third shell. According to the invention, by adopting the quartz lens subjected to electromagnetic simulation optimization and matching with the 80GHz high-frequency radar, the signal focusing and penetrating capacity in a high-temperature environment is obviously improved, and the high-precision and high-reliability material level measurement in an extreme temperature range of-40 ℃ to 500 ℃ is realized.

Inventors

  • Song Ziang
  • LIN HAOJIE
  • ZHANG ZHE
  • Chu Anjun

Assignees

  • 陕西声科电子科技有限公司

Dates

Publication Date
20260505
Application Date
20260306

Claims (10)

  1. 1. A high-temperature-resistant radar liquid level gauge adopting a quartz material lens is characterized by comprising a shell arranged at the top of a to-be-measured object/liquid tank, wherein the shell comprises a first shell (301), a second shell (302) and a third shell (303) which are sequentially connected from bottom to top, an inner shell (304) is arranged in the third shell (303), and an upper cover (305) is arranged at the upper end of the third shell; The mounting flange (101) is arranged at the bottom of the first shell (301), the quartz lens (104) is arranged at the bottom of the first shell (301) by penetrating and pressing, a horn antenna (105) is arranged above the quartz lens (104), the horn antenna (105) is connected with a radio frequency board (108) positioned in the second shell (304) through a waveguide tube (106) penetrating through the inside of the second shell (302), the radio frequency board (108), a main control board (109), a signal board (110) and a power board (111) are sequentially arranged in the inner shell (304) from bottom to top, and a display screen (107) is arranged at the joint of the upper cover (305) and the third shell (303); the cambered surface curve parameters of the quartz lens (104) are determined by simulating an optimal signal through electromagnetic simulation according to the characteristics of quartz materials; in operation, based on 80GHZ radar, the liquid level is measured in the temperature range of-40 ℃ to 500 ℃ by the electromagnetic wave reflection principle, and data is transmitted to a customer control room.
  2. 2. The high-temperature-resistant radar level gauge using a quartz material lens according to claim 1, wherein the mounting flange (101) is mounted on the upper portion of the tank body in a bolt-and-nut connection mode, the first shell (301) is mounted on the mounting flange (101) in a threaded connection mode, the first shell (301) is connected with the second shell (302) in a threaded mode, the third shell (303) is connected with the second shell (302) in a shaft sleeve and a clamping spring or in a threaded mode, the inner shell (304) is fixed in the third shell (303) in a bolt mode, and the third shell (303) is connected with the upper cover (305) in a threaded mode.
  3. 3. The high temperature resistant radar level gauge according to claim 1, wherein the upper cover (305) is provided with a glass plate (306) opposite to the display screen (107).
  4. 4. The high-temperature-resistant radar level gauge using a quartz material lens according to claim 1, wherein the power panel (111) and the signal panel (110), the signal panel (110) and the main control panel (109), the main control panel (109) and the radio frequency panel (108) are respectively connected in the form of pins, the display screen (107) and the main control panel (109) are connected in the form of flat cables, and the gram head (103) is connected with the third shell (303) in the form of threads.
  5. 5. The high temperature resistant radar level gauge using a quartz material lens according to claim 1, wherein an RS-485 unit, a 4-20mA analog signal unit, a HART protocol unit, and a power interface unit are provided on the power board (111).
  6. 6. The high-temperature-resistant radar level gauge using a quartz material lens according to claim 1, wherein the second housing (302) is provided with an integrated heat sink (102), the second housing (302) is internally provided with a heat insulating pipe (203), and the waveguide (106) penetrates through the heat insulating pipe (203).
  7. 7. The high temperature resistant radar level gauge using a quartz material lens according to claim 6, wherein a fixing sleeve (204) is provided at an upper end of the heat insulating tube (203).
  8. 8. The high temperature resistant radar level gauge using a quartz material lens according to claim 1, wherein the upper end of the waveguide tube (106) is connected to the transmitting plate in a threaded manner, so as to transmit signals to the transmitting plate, the lower end of the waveguide tube (106) is mounted at the upper end of the horn antenna (105) in a shaft sleeve manner, and the transmitting plate is fixed at the lower end of the radio frequency plate (108) in a bolt manner.
  9. 9. The high temperature resistant radar level gauge using a quartz material lens according to claim 1, wherein the horn antenna (105) is arranged right above the quartz lens (104), and a high temperature resistant insulating sleeve (202) is arranged between the horn antenna (105) and the first housing (301), so as to limit and insulate the horn antenna (105).
  10. 10. The high-temperature-resistant radar level gauge using a quartz material lens according to claim 1, wherein a high-temperature-resistant gasket (201) is arranged between the quartz lens (104) and the mounting flange (101), and high-temperature-resistant glue is coated between the quartz lens (104) and the first housing (301).

Description

High-temperature-resistant radar liquid level gauge adopting quartz material lens Technical Field The invention relates to the field of liquid level meters, in particular to a high-temperature-resistant radar liquid level meter adopting a quartz material lens. Background In the process industries of energy power, metallurgy, chemical industry, building materials, environmental protection, solid waste treatment and the like, liquid level measurement in a high-temperature environment is always a key link of automatic control of a production process. At present, the high temperature tolerance of the industrial radar level gauge applied to the scene in China mainly depends on the selection of lens materials. The common high-frequency radar level gauge is suitable for high temperature, and high-performance engineering plastics such as PEEK (polyether ether ketone), PTFE (polytetrafluoroethylene) or PFA (perfluoroalkoxy resin) are generally adopted as lens packaging materials. The material is widely applied to measuring the liquid level of equipment such as a boiler steam drum, a high-temperature reaction kettle, a molten salt storage tank, a glass melting furnace and the like by virtue of excellent corrosion resistance and dielectric properties, and can meet the requirements of a production process on real-time monitoring and data support to a certain extent. Along with the improvement of the industrial automation level, the instrument is gradually integrated with a more complex intelligent sensor unit for realizing the functions of signal processing, data communication and remote monitoring so as to adapt to the digital management requirements of modern factories. However, existing lens radar level gauges using PEEK, PTFE, PFA, or other materials are exposed to significant limitations in the face of more severe ultra-high temperature conditions. The long-term applicable temperature of the polymer material is generally not higher than 260 ℃, and when the polymer material is applied to scenes of steam drum liquid level measurement of supercritical parameters in a fire electric boiler, blast furnace slag or molten steel liquid level monitoring in metallurgical industry, high-temperature coal gasification furnaces in coal chemical industry, and waste incineration power generation hearth and the like, the temperature is far higher than 300 ℃ or even 500 ℃, the lens material can be softened, deformed or even decomposed due to approaching or exceeding the tolerance limit, so that the sealing failure or the wave transmission performance is rapidly reduced, and an internal intelligent sensor cannot receive a stable echo signal, so that measurement distortion or equipment damage is caused. The bottleneck of the temperature resistance of the material not only limits the deep application of the instrument in a key high-temperature process link, but also brings potential risks to production safety, as serious safety accidents such as dry burning, full water and even explosion are easily caused by the uncontrolled liquid level in a high-temperature and high-pressure environment. Therefore, developing a novel liquid level meter capable of tolerating higher temperature and guaranteeing signal transmission stability and long-term reliable operation of an intelligent sensor becomes a technical problem to be solved urgently. Disclosure of Invention Aiming at the problems existing in the background technology, the high-temperature-resistant radar liquid level meter adopting the quartz lens is provided, and the signal focusing and penetrating capacity in a high-temperature environment is remarkably improved by adopting the quartz lens which is optimized through electromagnetic simulation and matching with the 80GHz high-frequency radar, so that the high-precision and high-reliability level measurement in an extreme temperature range of-40 ℃ to 500 ℃ is realized. The invention provides a high-temperature-resistant radar liquid level meter adopting a quartz lens, which comprises a shell arranged at the top of a to-be-measured object/liquid tank, wherein the shell comprises a first shell, a second shell and a third shell which are sequentially connected from bottom to top, an inner shell is arranged in the third shell, an upper cover is arranged at the upper end of the third shell, a mounting flange is arranged at the bottom of the first shell, the quartz lens is arranged at the bottom of the first shell in a penetrating and pressing manner, a horn antenna is arranged above the quartz lens, the horn antenna is connected with a radio frequency plate in the inner shell through a waveguide tube penetrating through the second shell, a radio frequency plate, a main control plate, a signal plate and a power supply plate are sequentially arranged in the inner shell from bottom to top, a display screen is arranged at the joint of the upper cover and the third shell, the arc surface curve parameter of the quartz lens is determined by simulatin