CN209858020U - Air-cooled passive nucleon level indicator - Google Patents

Abstract

An air-cooled passive nuclear level gauge comprises a pipeline assembly, a gamma ray sensor, a support ring, an exhaust fan and a heat insulation foam layer. The pipeline assembly comprises a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline; the first pipeline, the second pipeline and the third pipeline are sequentially connected through the connecting joints, and the third pipeline, the fourth pipeline and the fifth pipeline are sequentially and horizontally connected. The gamma-ray sensor is suspended and fixed in the fourth pipeline by two support rings, the probe extends out of the outer wall of the fourth pipeline, the exhaust fan is arranged at the tail part of the fifth pipeline, and the heat insulation foam layer is annularly arranged on the outer walls of the fourth pipeline and the fifth pipeline. The first pipeline is arranged outdoors and communicated with outside cold air; the probe of the gamma-ray sensor is close to the outer wall of the middle hopper, and the material level of the material in the middle hopper is measured. The utility model discloses the material level of the inside material of hopper in the middle of can guaranteeing, material spills over or empty material in the hopper in the middle of under avoiding high temperature, corruption and the environment that has the radiation.

Description

Air-cooled passive nucleon level indicator

Technical Field

The utility model relates to a material level measurement field, especially an air-cooled passive nucleon charge level indicator.

Background

The traditional method for measuring the weight of the material by adopting an electronic scale can not accurately reflect the real material condition, and considers UF in a hydrofluorination intermediate hopper₄、UO₂The corrosiveness of the mixed materials and the like is difficult to be accurately measured by an electronic scale and a common level gauge. And UF₄、UO₂Mixtures and the like are radioactive and can be measured at present with passive nuclear level gauges: when the material reaches the sensor mounting position of the passive nuclear level gauge, the gamma ray penetrating through the wall of the hopper triggers the change of the value of the sensor, so that the level height in the hopper is measured through the change of the value of the sensor.

However, the gamma-ray sensor probe has certain requirements on the working temperature, the stable working temperature range of the gamma-ray sensor probe is between-20 ℃ and 50 ℃, and when the temperature exceeds 50 ℃, the acquisition of the sensor probe on signals can be influenced, so that the output of the signals acquired by the sensor probe is distorted, and the data measured by the gamma-ray sensor probe loses accuracy and reliability. During actual material level measurement, the number of the pipelines installed on the intermediate hopper is about 10, the pipelines are all in hard connection with equipment, and the initial temperature of the intermediate hopper is low and the measurement is accurate in the process of starting operation; after the hopper runs for a period of time, the temperature rises, the hopper expands due to heating, and hard connection is adopted between the equipment and the hopper, so that the intermediate material measurement is inaccurate. In the operation process of the middle hopper, certain vibration exists, the internal temperature of the hopper is 300-400 ℃, the pressure is less than 100KPa, and the temperature of the outer wall is about 70 ℃, namely the working temperature of the gamma-ray sensor probe exceeds 50 ℃, and the working stability and the service life of the gamma-ray sensor probe are seriously influenced; and the ambient temperature is too high, and the heat that components and parts such as chip, power among the charge level indicator self during operation produced can't dispel rapidly. Therefore, how to improve the measurement of the level gauge in the environment with high temperature, corrosion and radiation is an urgent problem to be solved at present.

Disclosure of Invention

The utility model aims at overcoming prior art's the aforesaid not enough and provide an air-cooled passive nuclear charge level indicator, passive nuclear charge level indicator has a plurality of air pipe of being connected with the outer cold air in workshop and wraps up the thermal insulation material outside the charge level indicator sensor, introduces the outer cold air in workshop and effectively reduces the temperature of passive nuclear charge level indicator in the work measurement process to charge level indicator installation pipeline ventilation during the use, improves the detection efficiency and the life of passive nuclear charge level indicator.

The technical scheme of the utility model is that: an air-cooled passive nuclear level gauge comprises a pipeline assembly, a gamma ray sensor, a support ring, an exhaust fan and a heat insulation foam layer.

The pipeline assembly comprises a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline; the first pipeline, the second pipeline and the third pipeline are connected sequentially through connecting joints, and the third pipeline, the fourth pipeline and the fifth pipeline are horizontally connected sequentially through connecting flanges.

The gamma ray sensor is disposed in the fourth conduit.

The support rings are arranged at two ends of the gamma-ray sensor and used for suspending and fixing the gamma-ray sensor in the fourth pipeline, and the situation that the gamma-ray sensor shakes when the exhaust fan is started to blow air through the gamma-ray sensor is avoided.

The exhaust fan is arranged at the tail part of the fifth pipeline, and when the exhaust fan is opened, outside cold air circulates in the pipeline assembly.

The heat insulation foam layer is annularly arranged on the outer walls of the fourth pipeline and the fifth pipeline, so that the influence of the external environment temperature on the outer walls of the fourth pipeline and the fifth pipeline and pipe internal parts is reduced.

When the air conditioner is used, the first pipeline is arranged outdoors and is communicated with outside cold air; the probe of the gamma-ray sensor is close to the outer wall of the middle hopper, and the material level of the material in the middle hopper is measured.

Compared with the prior art, the utility model has the following characteristics:

1. the utility model discloses an air exhauster cooperation pipeline assembly forms ventilation system, introduces pipeline assembly with the outside cold air in workshop, for gamma ray sensor's probe cooling, makes charge level indicator job stabilization, improves charge level indicator measured data's true reliability.

2. The utility model discloses an use thermal insulation material parcel on the outer wall of the fourth pipeline and the fifth pipeline that are close to middle hopper, in can effectively blockking the outside high temperature of middle hopper and get into the pipeline, influence gamma ray sensor's the accuracy of probe.

3. The utility model ensures reasonable material level in the process of hopper operation, and avoids the phenomenon that the material overflows and enters an inlet pipeline or a front section process to influence the product quality; and simultaneously, the situation that the material level is insufficient, so that empty materials are in the middle hopper, the pressure in the outlet pipeline below disappears, and the feeding of the later-stage process is influenced can be avoided.

The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the measurement of the present invention;

FIG. 3 is a schematic view of a measurement of the maximum charge of the intermediate hopper;

fig. 4 is a schematic view of a measurement of the minimum charge of the intermediate hopper.

Detailed Description

In the first embodiment, as shown in fig. 1 to 4, the air-cooled passive nuclear level gauge comprises a pipeline assembly, a gamma ray sensor 2, a support ring 3, an exhaust fan 4 and a heat insulation foam layer 5.

The pipe assembly comprises a first pipe 1-1, a second pipe 1-2, a third pipe 1-3, a fourth pipe 1-4 and a fifth pipe 1-5. The first pipeline 1-1, the second pipeline 1-2 and the third pipeline 1-3 are connected sequentially through a connecting joint, and the third pipeline 1-3, the fourth pipeline 1-4 and the fifth pipeline 1-5 are horizontally connected sequentially through a connecting flange.

The gamma-ray sensor 2 is arranged in a fourth pipeline 1-4;

the two support rings 3 are arranged at two ends of the gamma-ray sensor 2 and used for fixing the gamma-ray sensor 2 in the fourth pipeline 1-4, so that a probe of the gamma-ray sensor 2 is suspended and fully contacted with air for heat dissipation, the gamma-ray sensor 2 is fixed when external cold air passes through the fourth pipeline 1-4, the probe is prevented from shaking, and the accuracy of probe measurement of the gamma-ray sensor 2 is improved.

The exhaust fan 4 is arranged at the tail part of the fifth pipeline 1-5, when the exhaust fan 4 is started, cold air outside a workshop is introduced from the first pipeline 1-1, flows through the gamma-ray sensor 2 in the second pipeline 1-2, the third pipeline 1-3 and the fourth pipeline 1-4 and the fifth pipeline 1-5, is continuously ventilated in the pipeline assembly, and the temperature in the fourth pipeline 1-4 is controlled within the temperature range of stable work of the probe of the gamma-ray sensor 2, so that the probe can measure real and reliable data.

The heat insulation foam layer 5 is arranged on the outer walls of the fourth pipelines 1-4 and the fifth pipelines 1-5 in an encircling mode. Because the fourth pipeline 1-4 and the fifth pipeline 1-5 are close to the outer wall of the high-temperature intermediate hopper 7 in the measurement process, the ambient temperature around the fourth pipeline 1-4 and the fifth pipeline 1-5 is higher, the heat insulation foam layer 5 is arranged on the outer wall of the fourth pipeline 1-4 and the outer wall of the fifth pipeline 1-5, so that the temperature rise of the fourth pipeline 1-4 and the fifth pipeline 1-5 can be reduced, and the influence of the high temperature of the outer wall of the intermediate hopper 7 on the probe of the gamma-ray sensor 2 is reduced.

When in use, the first pipeline 1-1 is arranged outdoors and communicated with outside cold air; the probe of the gamma-ray sensor 2 is close to the outer wall of the intermediate hopper 7, and the material level of the material in the intermediate hopper 7 is measured.

When in use, the air-cooled passive nuclear level gauge comprises the following steps:

defining the upper boundary of the materials when the middle hopper 7 is charged to the maximum as a hopper charging end position A, and the upper boundary of the materials when the middle hopper 7 is charged to the minimum as a hopper charging initial position B;

a, four air-cooled passive nuclear material level meters are uniformly and annularly arranged at an upper end hopper charging ending position A and a lower end hopper charging initial position B on the outer wall of the middle hopper 7 respectively, first pipelines 1-1 of the air-cooled passive nuclear material level meters are installed outdoors, and probes are close to the material wall of the middle hopper 7. Specifically, as shown in fig. 2, the air-cooled passive nuclear level gauge is arranged parallel to the outer wall of the intermediate hopper, and the sensitive point of the probe of the air-cooled passive nuclear level gauge is close to the outer wall of the intermediate hopper.

B, starting an exhaust fan 4, enabling the materials to enter an intermediate hopper 7 from an inlet pipeline 8, discharging the materials in the intermediate hopper 7 from an outlet pipeline 9, and enabling the materials to enter a rear-section process, wherein the eight air-cooled passive nucleon material level meters are used for respectively measuring the material level in the intermediate hopper 7;

c, if the air-cooled passive nuclear level gauge at the hopper charging end position A detects a material signal, stopping the material from entering the intermediate hopper 7 from the inlet pipeline 8, as shown in FIG. 3; if the air-cooled passive nuclear level gauge at the hopper charge initiation position B does not detect a material signal, the discharge of material from the outlet conduit 9 out of the intermediate hopper 7 is stopped, as shown in fig. 4.

The utility model can effectively ensure the material level of the material in the middle hopper 7 during the operation process, so that the material can not overflow and enter the inlet pipeline 8 or the front-end process, thereby influencing the product quality; meanwhile, empty materials in the tank can not be caused due to insufficient material level of the materials, so that the pressure in the outlet pipeline 9 below disappears to influence the feeding of the later-stage process.

Claims (1)

1. An air-cooled passive nucleon level indicator is characterized in that: the device comprises a pipeline assembly, a gamma ray sensor, a support ring, an exhaust fan and a heat insulation foam layer;

the pipeline assembly comprises a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline; the first pipeline, the second pipeline and the third pipeline are connected sequentially through connecting joints, and the third pipeline, the fourth pipeline and the fifth pipeline are horizontally connected sequentially through connecting flanges;

the gamma ray sensor is arranged in the fourth pipeline;

the two support rings are arranged at two ends of the gamma-ray sensor and used for suspending and fixing the gamma-ray sensor in the fourth pipeline;

the exhaust fan is arranged at the tail part of the fifth pipeline;

the heat insulation foam layer is annularly arranged on the outer walls of the fourth pipeline and the fifth pipeline;

when the air conditioner is used, the first pipeline is arranged outdoors and is communicated with outside cold air; the probe of the gamma-ray sensor is close to the outer wall of the middle hopper, and the material level of the material in the middle hopper is measured.