A radar level gauge cleaning device

Abstract

The utility model discloses a radar liquid level meter cleaning device, including the outer frame shell of installation in the top of container, tooth column, radar liquid level ware, cleaning cover, fixed ring, lifting mechanism, rotating mechanism and controller, the outer frame shell inner chamber is sealed and is divided into device chamber and detection chamber from top to bottom, and detection chamber is connected with the container, the radar liquid level meter movable mounting is in device chamber, and the probe end of radar liquid level meter extends into detection chamber downward, tooth column rotatory mounting is in device chamber in radar liquid level ware one side, and tooth column can slide up and down along the axial, tooth column bottom end extends into detection chamber downward, and with cleaning cover fixed connection, the utility model solves the existing radar liquid level meter probe cleaning and needs to dismantle, and the problem that cleaning is not thorough, residual influence detection accuracy, realizes the automatic cleaning of probe without dismantling, guarantees the detection stability.

Description

Technical Field

[0001] This utility model belongs to the field of radar level gauge cleaning, and specifically relates to a radar level gauge cleaning device. Background Technology

[0002] Radar level gauges are key devices used in industrial production for the accurate measurement of liquid and solid particle levels in containers, based on the principle of radar wave reflection. Their probes are in direct contact with the measured medium. The probe surface is prone to contamination due to media evaporation, crystallization, or dust accumulation, leading to attenuation of the radar wave reflection signal, increased measurement errors, and potentially long-term equipment malfunctions. Therefore, regular probe cleaning is essential for ensuring stable operation.

[0003] In existing technologies, cleaning radar level gauge probes mainly relies on manual wiping or simple spraying devices: manual cleaning requires stopping the machine, which is inefficient and poses safety risks; simple spraying devices are mostly fixed structures with limited cleaning range, and cleaning wastewater can easily seep into the equipment and cause pollution; some automatic cleaning devices lack precise positioning mechanisms, and the cleaning parts are prone to collision with the probe. At the same time, they lack sealing design, and residual moisture and external dust after cleaning can easily cause secondary pollution. Moreover, the cleaning process often interferes with normal level detection. Utility Model Content

[0004] To address the shortcomings and problems of existing radar level gauge cleaning methods, this invention provides a radar level gauge cleaning device that solves the problems of disassembly required for cleaning existing radar level gauge probes, incomplete cleaning, and residue affecting detection accuracy. This device achieves probe cleaning without disassembly, ensuring detection stability.

[0005] The solution adopted by this utility model to solve its technical problem is as follows: a radar level gauge cleaning device, including an outer frame housing installed on the top of a container, and further including a toothed column, a radar level gauge, a cleaning cover, a fixing ring, a lifting mechanism, a rotating mechanism, and a controller. The inner cavity of the outer frame housing is sealed and divided into a device cavity and a detection cavity from top to bottom, and the detection cavity is connected to the container. The radar level gauge is movably installed in the device cavity, and the probe end of the radar level gauge extends downward into the detection cavity. The toothed column is rotatably installed in the device cavity on one side of the radar level gauge, and the toothed column can slide up and down axially. The bottom end of the toothed column extends downward. The probe of the radar level gauge is inserted into the detection chamber and fixedly connected to the cleaning hood. The rotating mechanism and the lifting mechanism are both connected to the gear drive. The controller can adjust the height and horizontal position of the cleaning hood through the rotating mechanism and the lifting mechanism to seal the probe end of the radar level gauge inside. The bottom of the cleaning hood is provided with a drain port and connected to a drain pipe. The other end of the drain pipe extends outward to the outer frame and is connected to a sludge pump. A high-pressure nozzle is installed inside the cleaning hood. An air inlet is provided on the cleaning hood above the nozzle. The air inlet is connected to an air pipe. The other end of the air pipe extends outward to the outer frame and is equipped with a filter element.

[0006] The outer frame housing is fitted with a partition, which seals and divides the inner cavity of the frame housing from top to bottom into a device cavity and a detection cavity.

[0007] The bottom of the device cavity is provided with a probe hole that communicates with the detection cavity along the vertical direction. Around the probe hole, the bottom of the device cavity is provided with multiple studs along the circumferential direction. The flange of the radar level gauge is fitted into the studs and fastened together with nuts. The probe end of the radar level gauge extends into the detection cavity through the probe hole.

[0008] The lifting mechanism includes a lifting rod, a mounting frame, and a rotary joint. The lifting rod is coaxially arranged in the device cavity above the tooth column and is fixedly installed at the bottom of the device cavity by the mounting frame. The lifting rod is connected to the controller. The telescopic end of the lifting rod is set downward and is rotatably connected to the top of the tooth column by the rotary joint.

[0009] The rotating mechanism includes a rotary motor and a drive gear. The outer ring surface of the gear column is provided with teeth along the circumferential direction. The rotary motor is fixedly installed at the bottom of the device cavity and connected to the controller. The motor shaft of the rotary motor extends downward into the detection cavity. The drive gear is fixedly mounted on the motor shaft inside the detection cavity, and the drive gear meshes with the teeth of the gear column.

[0010] The detection chamber is equipped with a liquid supply pipe. The first end of the liquid supply pipe is connected to the liquid inlet of the high-pressure nozzle, and the tail end of the liquid supply pipe extends outward from the outer frame and is connected to the liquid supply assembly.

[0011] The cleaning hood is a cone-shaped structure with the opening facing upwards.

[0012] The beneficial effects of this utility model: Compared with the existing cleaning methods that rely on manual wiping or fixed spraying, the radar level gauge cleaning device provided by this utility model has the following beneficial effects:

[0013] 1. The radar level gauge cleaning device provided by this utility model can automatically move the cleaning cover to the bottom of the probe and complete the entire process of sealing, cleaning, sewage discharge and drying through the coordinated control of the lifting mechanism and the rotating mechanism. The whole process does not require manual intervention or disassembly of the radar level gauge, which greatly improves maintenance efficiency and reduces operation and maintenance costs and safety risks. It is especially suitable for dangerous working environments such as high temperature, high pressure, toxic or high-altitude installation.

[0014] 2. The radar level gauge cleaning device provided by this utility model has a high-pressure fan-shaped nozzle inside the cleaning cover. The spray angle can cover the entire surface of the probe, effectively removing crystals, oil stains, dust and other adhering substances from the probe surface, significantly reducing radar wave signal attenuation, restoring measurement sensitivity, and ensuring the long-term accuracy and reliability of level detection.

[0015] 3. The radar level gauge cleaning device provided by this utility model has a rubber sealing ring on the top of the cleaning cover. After rising into position, it fits tightly with the partition to form a closed cleaning space. This design effectively prevents the rinsing fluid from seeping into the equipment and causing short circuits or corrosion, while also preventing external dust and moisture from entering after cleaning, thus eliminating the problem of secondary pollution where "the more you wash, the dirtier it gets."

[0016] 4. The radar level gauge cleaning device provided by this utility model is equipped with an independent sewage pipe and a sewage pump, which can quickly discharge sewage; and introduce clean air through an air inlet pipe with a filter and a one-way valve, which accelerates the drying of the probe surface under negative pressure, preventing water film residue from affecting the dielectric constant and subsequent measurement accuracy, and realizing the integrated closed-loop treatment of "washing-draining-drying".

[0017] 5. The radar level gauge cleaning device provided by this utility model has a cleaning cover located to the side of the probe and in a sealed standby position when the device is not in operation. This completely avoids obstructing the radar wave transmission path and does not affect the daily measurement function of the radar level gauge. It only intervenes briefly when a cleaning command is executed and quickly resets after cleaning is completed, ensuring continuous system operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the position of the cleaning cover of this utility model.

[0020] Figure 3 This is a schematic diagram of the cleaning cover structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the lifting mechanism of this utility model.

[0022] Figure 5 This is a schematic diagram of the horizontal movement process of the cleaning cover of this utility model.

[0023] The following numbers are used in the diagram: 1 is the outer frame, 11 is the partition, 2 is the radar level gauge, 3 is the cleaning hood, 31 is the liquid supply pipe, 32 is the air pipe, 33 is the sewage pipe, 4 is the gear column, 41 is the fixing ring, 5 is the lifting mechanism, 51 is the lifting rod, 52 is the mounting bracket, 53 is the rotary joint, 6 is the rotating mechanism, and 61 is the drive gear. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0025] This embodiment provides a cleaning device for a radar level gauge 2, such as... Figure 1-5As shown, the device includes an outer frame housing 1, a toothed column 4, a radar level gauge 2, a cleaning cover 3, a fixing ring 41, a lifting mechanism 5, a rotating mechanism 6, and a controller. The outer frame housing 1 is fitted and installed on the top of the container. The container is used to install the radar level gauge 2 to detect the liquid level of the internal medium. The outer frame housing 1 is a vertically arranged hollow shell. Its inner cavity is sealed and divided into an upper device cavity and a lower detection cavity by a horizontally arranged partition 11. The radar level gauge 2 is movably installed in the device cavity, and the probe end of the radar level gauge 2 extends downward into the detection cavity to detect the liquid level of the medium in the container. The device cavity is used to install drive and control components to avoid direct contact with the medium inside the container.

[0026] The bottom of the device cavity (i.e., the upper surface of the partition 11) is vertically provided with a probe hole communicating with the detection cavity. Multiple studs are evenly distributed circumferentially on the partition 11 around the probe hole. The number of studs is the same as the number of through holes in the flange of the radar level gauge 2. The flange of the radar level gauge 2 is inserted into the studs through the through holes and secured with nuts, thus fixing the radar level gauge 2 inside the device cavity. The probe end of the radar level gauge 2 extends vertically downwards through the probe hole into the detection cavity.

[0027] The toothed column 4 is a vertically arranged cylinder with teeth along its entire axial length on its outer ring surface. The toothed column 4 is rotatably installed within the device cavity on one side of the radar level gauge 2, and can slide up and down axially. Specifically, a vertical shaft hole is provided on the partition 11 on one side of the radar level gauge 2, through which the toothed column 4 is rotatably installed and can slide up and down along the shaft hole. The bottom end of the toothed column 4 extends downward into the detection cavity and is fixedly connected to the cleaning cover 3. There are various ways to connect the toothed column 4 to the cleaning cover 3, such as... Figure 3 As shown, the cleaning cover 3 is fitted with a fixing ring 41 on its outer fixing sleeve, and the bottom end of the toothed column 4 is fixedly connected to the fixing ring 41.

[0028] The cleaning hood 3 is a cone-shaped structure with an upward-facing opening. Its inner wall is smooth, and the taper is set at 60° to facilitate wastewater collection. A rubber sealing ring is provided at the top edge of the hood to achieve a seal when it is in contact with the lower surface of the partition 11. Both the rotating mechanism 6 and the lifting mechanism 5 are connected to the gear column 4. The controller can adjust the height and horizontal position of the cleaning hood 3 through the rotating mechanism 6 and the lifting mechanism 5, sealing the probe end of the radar level gauge 2 inside. Specifically:

[0029] like Figure 2 and Figure 3As shown, the lifting mechanism 5 includes a lifting rod 51, a mounting frame 52, and a rotary joint 53. The mounting frame 52 is a gantry-shaped structure. The two support legs of the mounting frame 52 are fixed to the upper surface of the partition plate 11 by bolts. The lifting rod 51 is vertically installed on the top of the mounting frame 52 and is located above the toothed column 4 and is coaxially arranged with the toothed column 4. There are various types of lifting rods 51. In this embodiment, the lifting rod 51 is an electric push rod and is electrically connected to the controller. The telescopic end of the lifting rod 51 is set downward and is connected to the top of the toothed column 4 through the rotary joint 53.

[0030] There are various types of rotary joints 53. In this embodiment, the rotary joint 53 adopts a deep groove ball bearing structure. The inner ring is interference-fitted with the top of the gear column 4, and the outer ring is fixedly connected to the telescopic end of the lifting rod 51 to ensure that the lifting rod 51 does not move when the gear column 4 rotates, while transmitting the lifting driving force.

[0031] The rotating mechanism 6 includes a rotary motor and a drive gear 61. The rotary motor is a servo motor, which is fixedly mounted on the upper surface of the partition 11 via a motor mount and electrically connected to the controller. The motor shaft of the rotary motor extends downward through the partition 11 into the detection chamber. The drive gear 61 is fixedly mounted on the motor shaft via a key connection and meshes with the teeth of the gear column 4. By controlling the forward and reverse rotation and the rotation angle of the rotary motor, the gear column 4 can be driven to rotate the cleaning cover 3 horizontally within a certain range, enabling it to rotate from one side of the radar level gauge 2 to directly below the radar level gauge 2. When the controller drives the gear column 4 to rise or fall via the lifting rod 51, the gear column 4 will slide along the teeth of the drive gear 61.

[0032] like Figure 1 river Figure 4 As shown, the bottom of the cleaning hood 3 is provided with a drain port and connected to a drain pipe 33. The other end of the drain pipe 33 passes through the side wall of the detection chamber and the outer frame shell 1 in sequence and extends to the outside, and is connected to a sewage pump. The sewage pump is a corrosion-resistant centrifugal pump, which is electrically connected to the controller and is used to extract sewage from the cleaning hood 3.

[0033] A high-pressure nozzle is installed inside the cleaning hood 3, and a liquid supply pipe 31 is provided inside the detection chamber. The first end of the liquid supply pipe 31 is connected to the liquid inlet of the high-pressure nozzle installed on the inner wall of the cleaning hood 3 via a quick connector. The high-pressure nozzle is a fan-shaped spray nozzle, and the spray angle covers the entire surface of the probe end of the radar level gauge 2. The tail end of the liquid supply pipe 31 passes through the outer frame housing 1 and is connected to the liquid supply assembly. The liquid supply assembly includes a liquid storage tank, a high-pressure pump, and a solenoid valve. The solenoid valve is electrically connected to the controller and is used to control the on / off state and flow rate of the flushing liquid.

[0034] An air inlet is provided on the cleaning hood 3 above the overhead nozzle. The air inlet is connected to an air pipe 32. The other end of the air pipe 32 extends outward from the outer frame shell 1 and is fitted with a filter element. Furthermore, a one-way valve is provided on the air pipe 32 to ensure that gas flows into the cleaning hood 3 only from the outside.

[0035] In this embodiment, the controller adopts a PLC control system, which is installed on the top of the device cavity and is electrically connected to the lifting rod 51, the rotary motor, the sewage pump, the solenoid valve and the high-pressure pump respectively, so as to realize the coordinated operation of each component.

[0036] Before the cleaning command is executed, the cleaning cover 3 of the radar level gauge 2 provided in this embodiment is located on one side of the radar level gauge 2, and the lifting rod 51 is in a fully retracted state. The top of the cleaning cover 3 is in contact with the lower surface of the partition 11, and the rubber sealing ring is pressed to achieve self-sealing, preventing the medium in the detection chamber from entering the device chamber or external dust from entering.

[0037] When executing a cleaning command, the controller sends an extension command to the lifting rod 51, causing the gear column 4 to drive the cleaning cover 3 vertically downwards to 10-15mm below the probe end, at which point the lifting rod 51 stops. Then, the controller starts the rotary motor, and the drive gear 61 drives the gear column 4 to rotate, positioning the cleaning cover 3 directly below the radar level gauge 2, at which point the rotary motor stops. Next, the controller controls the lifting rod 51 to retract, causing the cleaning cover 3 to rise to its top and adhere to the lower surface of the partition 11, sealing it with the rubber sealing ring and completely enclosing the probe end within the cleaning cover 3. The controller then opens the solenoid valve and starts the high-pressure pump, and the high-pressure nozzle sprays... The probe end is sprayed with rinsing fluid, and the rinsing time is set to 30-60 seconds. After rinsing, the controller closes the solenoid valve and the high-pressure pump, and starts the sludge pump. The sewage in the cleaning hood 3 is discharged through the drain pipe 33. During the discharge process, a negative pressure is formed in the cleaning hood 3. External air enters through the air pipe 32 after being filtered by the filter element, which accelerates the drying of the probe end. The duration is set to 20-30 seconds. After drying is completed, the controller closes the sludge pump, the lifting rod 51 extends to lower the cleaning hood 3, the rotary motor reverses to reset, and then the lifting rod 51 retracts to raise the cleaning hood 3 to the self-sealing position, returning it to the non-clean state.

[0038] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model, and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A radar level gauge cleaning device, comprising an outer frame housing mounted on top of a container, characterized in that, It also includes a gear column, a radar level gauge, a cleaning hood, a fixing ring, a lifting mechanism, a rotating mechanism, and a controller. The inner cavity of the outer frame is sealed and divided into a device cavity and a detection cavity from top to bottom, and the detection cavity is in communication with the container. The radar level gauge is movably installed in the device cavity, and the probe end of the radar level gauge extends downward into the detection cavity. The gear column is rotatably installed in the device cavity on one side of the radar level gauge, and the gear column can slide up and down axially. The bottom end of the gear column extends downward into the detection cavity and is fixedly connected to the cleaning hood. The rotating mechanism... Both the lifting mechanism and the rotating mechanism are connected to the gear drive. The controller can adjust the height and horizontal position of the cleaning hood through the rotating mechanism and the lifting mechanism, and seal the probe end of the radar level gauge inside. The bottom of the cleaning hood is provided with a drain port and connected to a drain pipe. The other end of the drain pipe extends outward from the outer frame and is connected to a sludge pump. A high-pressure nozzle is installed inside the cleaning hood. An air inlet is provided on the cleaning hood above the nozzle. The air inlet is connected to an air pipe. The other end of the air pipe extends outward from the outer frame and is equipped with a filter element.

2. The radar level gauge cleaning device according to claim 1, characterized in that, The outer frame is fitted with a partition, which seals and divides the inner cavity of the frame from top to bottom into a device cavity and a detection cavity.

3. The radar level gauge cleaning device according to claim 1, characterized in that, The bottom of the device cavity is provided with a probe hole that communicates with the detection cavity along the vertical direction. Around the probe hole, the bottom of the device cavity is provided with multiple studs along the circumferential direction. The flange of the radar level gauge is fitted into the studs and fastened together with nuts. The probe end of the radar level gauge extends into the detection cavity through the probe hole.

4. The radar level gauge cleaning device according to claim 1, characterized in that, The lifting mechanism includes a lifting rod, a mounting frame, and a rotary joint. The lifting rod is coaxially arranged in the device cavity above the tooth column and is fixedly installed at the bottom of the device cavity by the mounting frame. The lifting rod is connected to the controller. The telescopic end of the lifting rod is set downward and is rotatably connected to the top of the tooth column by the rotary joint.

5. The radar level gauge cleaning device according to claim 1, characterized in that, The rotating mechanism includes a rotary motor and a drive gear. The outer ring surface of the gear column is provided with teeth along the circumferential direction. The rotary motor is fixedly installed at the bottom of the device cavity and connected to the controller. The motor shaft of the rotary motor extends downward into the detection cavity. The drive gear is fixedly mounted on the motor shaft inside the detection cavity, and the drive gear meshes with the teeth of the gear column.

6. The radar level gauge cleaning device according to claim 1, characterized in that, The detection chamber is equipped with a liquid supply pipe. The first end of the liquid supply pipe is connected to the liquid inlet of the high-pressure nozzle, and the tail end of the liquid supply pipe extends outward from the outer frame and is connected to the liquid supply assembly.

7. The radar level gauge cleaning device according to claim 1, characterized in that, The cleaning hood is a cone-shaped structure with the opening facing upwards.

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