CN106840311B - Material level detection device - Google Patents

Abstract

The invention relates to a material level detection device, in particular to a material level detection device used in severe environments such as high temperature and containing a large amount of dust. The device comprises a radar level gauge, a connecting flange and a ray channel, wherein a heat insulation device is installed between the radar level gauge and the ray channel through the connecting flange, and a cooling air system is installed on the ray channel. The radar material level gauge has a heat insulation protection function, avoids heat conduction to the radar material level gauge due to overhigh environment temperature, can prolong the service life of the radar material level gauge, utilizes cold air of a cooling air system to completely sweep accumulated dust in a ray channel, can maintain positive pressure in the system, avoids floating objects from entering the ray channel to influence ray turning-back effect, accurately and stably detects the material level in real time, and accordingly ensures long-term stable operation of equipment.

Description

Material level detection device

technical field

The invention relates to a material level detection device, in particular to a material level detection device used in harsh environments such as high temperature and a large amount of dust.

Background technique

In the actual application process, the material level detection device is usually directly fixed at the reserved hole at the top of the container through its mounting flange. Under the high temperature condition of the incineration system, the surrounding temperature of the detection device is high and contains a lot of dust. In general radar level devices, there are easily floating objects in the ray channel, which will affect the effect of ray return, resulting in inaccurate detection and difficult to achieve stable operation. In addition, due to the excessively high link temperature, heat is conducted to the level meter, which will not take long. damage, short service life.

SUMMARY OF THE INVENTION

The present invention aims to solve the above problems, thereby providing a material level detection device with accurate detection, operating temperature and long service life.

The present invention solves the described problem, and the technical scheme adopted is:

A material level detection device comprises a radar material level gauge, a connecting flange and a ray channel. A heat insulation device is installed between the radar material level gauge and the ray channel through the connecting flange, and a cooling air system is installed on the ray channel.

The present invention that adopts the above-mentioned technical scheme, compared with the prior art, its outstanding feature is:

①It has the function of heat insulation protection to avoid heat conduction to the radar level gauge due to excessive ambient temperature, which can prolong the service life of the radar level gauge.

②Using the cold air of the cooling air system to clean the dust accumulation in the ray channel, it can maintain the positive pressure in the system, prevent the floating objects from entering the ray channel and affect the ray return effect, and detect the material level accurately and stably in real time, thus ensuring the long-term operation of the equipment. Stable operation.

③ Simple structure and low production cost.

As preferably, the further technical scheme of the present invention is:

The cooling air system includes an air inlet pipe and a first manual ball valve. One end of the air inlet pipe is connected to the ray channel, and the other end of the air inlet pipe is connected to a cooling fan. The first manual ball valve is installed on the air inlet pipe. When working, the first manual ball valve is opened. Manual ball valve, the cooling air enters the ray channel through the air inlet pipe to ensure the positive pressure of the system, and at the same time prevent the floating objects from entering the ray channel and affect the ray return effect.

A second manual ball valve is also installed on the air inlet pipe. The lower part of the radar level gauge is provided with a purge hole. The second manual ball valve is connected to the purge hole through a metal hose. The second manual ball valve is opened, and the cooling air passes through the metal hose. The hose enters the purge hole to clean the radar level gauge.

A gate valve is installed between the heat insulation device and the ray channel. When overhauling the radar level meter, only the gate valve needs to be closed, and the whole system does not need to be shut down to ensure continuous production.

The thermal insulation device is composed of ceramic fiber cotton wrapped with metal mesh. The ceramic fiber cotton has the function of thermal insulation protection, which can effectively avoid the heat conduction of the high temperature gas in the working environment to the radar level gauge.

Description of drawings

1 is a schematic structural diagram of an embodiment of the present invention;

Fig. 2 is the left-view structural schematic diagram of Fig. 1;

In the figure: radar level gauge 1; connecting flange 2; heat insulation device 3; purge hole 4; gate valve 5; first manual ball valve 6; second manual ball valve 7; air inlet pipe 8; ray channel 9 ; metal hose 10 ; ray work area 11 .

Detailed ways:

The present invention will be further described below in conjunction with the embodiments, the purpose is only to better understand the content of the present invention, therefore, the examples do not limit the protection scope of the present invention.

Referring to Figures 1 and 2, the radar level gauge 1 is installed above the heat insulation device 3 through the connecting flange 2, the lower part of the radar level gauge 1 is provided with a purge hole 4, and the gate valve 5 is a manual gate valve. Installed below the heat insulation device 3, the ray channel 9 is installed below the gate valve 5, and a cooling air system is also installed on the ray channel 9. The cooling air system includes the first manual ball valve 6, the air inlet pipe 8, the second hand A moving ball valve 7, a metal hose 10, one end of the air inlet pipe 8 is connected to the ray channel 9, the other end of the air inlet pipe 8 is connected with a cooling fan, and the first manual ball valve 6 and the second manual ball valve 7 are respectively installed in the air inlet pipe. 8, the second manual ball valve 7 is connected to the purge hole 4 through a metal hose 10, and the radar level meter 1 emits rays to form a ray working area 11 when it is working.

When working, open the first manual ball valve 6, and the cooling air enters the ray channel 9 through the air inlet pipe 8 to ensure the positive pressure of the system, and at the same time prevent the floating objects from entering the ray channel 9 to affect the ray return effect. When the radar level meter 1 needs to be cleaned , open the second manual ball valve 7, the cooling air enters the purge hole 4 through the metal hose 10, and the radar level gauge 1 can be cleaned.

The heat insulation device 3 of the present invention is composed of ceramic fiber cotton wrapped with a metal mesh, and has the function of heat insulation protection, which can effectively avoid the heat conduction of the high-temperature gas in the working environment to the radar level gauge 1, and can prolong the service life of the radar level gauge 1. The gate valve 5 is installed between the heat insulation device 3 and the ray channel 9, and only the gate valve 5 needs to be closed when the radar level gauge 1 is repaired, and the whole system does not need to be shut down to ensure the continuous production; the cooling air system is used The cold air blows the dust in the ray channel 9 clean, which can maintain the positive pressure in the system, prevent the floating objects from entering the ray channel 9 and affect the ray return effect, and detect the material level accurately and stably in real time, thus ensuring the long-term stable operation of the equipment; The cold air required for the purging hole 4 is supplied by the cooling air system, and there is no need to connect other air supply devices, which saves costs; the structure is simple and the manufacturing cost is low.

The above descriptions are only preferred feasible embodiments of the present invention, and are not intended to limit the scope of rights of the present invention. All equivalent changes made by using the contents of the description of the present invention and the accompanying drawings are included in the scope of rights of the present invention. .

Claims (1)

1. A material level detection device, comprising a radar material level meter, a connecting flange, and a ray channel, is characterized in that: a thermal insulation device is installed between the radar material level meter and the ray channel through the connecting flange, and a ray channel is installed with Cooling air system; the cooling air system includes an air inlet pipe and a first manual ball valve, one end of the air inlet pipe is connected to the ray channel, the other end of the air inlet pipe is connected with a cooling fan, and the first manual ball valve is installed on the air inlet pipe; A second manual ball valve is also installed on the pipe, a purge hole is arranged at the lower part of the radar material level meter, and the second manual ball valve is connected with the purge hole through a metal hose; a gate valve is installed between the heat insulation device and the ray channel ; The heat insulation device is composed of ceramic fiber cotton wrapped with metal mesh.

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