CN213023041U

CN213023041U - Moisture content measuring device with bypass

Info

Publication number: CN213023041U
Application number: CN202021622472.8U
Authority: CN
Inventors: 张东; 陈康宁; 梅小强; 柯鹏振
Original assignee: Qingdao Minghua Electronic Instrument Co ltd
Current assignee: Qingdao Minghua Electronic Instrument Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-04-20
Anticipated expiration: 2030-08-07

Abstract

The utility model discloses a moisture content measuring device with a bypass, which comprises a bypass and a gas path multi-way, wherein the gas path multi-way is provided with a gas inlet and a gas outlet, the gas outlet end is also provided with an inlet, the gas path multi-way is internally provided with a humidity sensor, the outer side of the sensing surface of the humidity sensor is provided with a cover body, and the cover body is provided with an outlet and a gas inlet; the bypass comprises a pump, one end of the pump is connected with the outlet through a pipeline, and the other end of the pump is connected with the inlet through a pipeline; the outer surface of the humidity sensor is also provided with a heat transfer sleeve, and the outer surface of the heat transfer sleeve is provided with a heating module; the gas that awaits measuring avoids detecting gaseous direct impact and the damage to humidity transducer from the response face of bypass passageway process sensor under the effect of bypass, combines to heat insulation structure design, effectively prevents to produce the comdenstion water at the sensor response face among the sampling process to can effectively improve humidity transducer's life and measurement accuracy, have better practical application and worth.

Description

Moisture content measuring device with bypass

Technical Field

The utility model belongs to particulate matter concentration measurement field, concretely relates to take moisture content measuring device of bypass.

Background

Moisture content in a flue needs to be measured during smoke monitoring and analysis, and most of instruments only heat air flow in a gas path at present, so that smoke is kept in a vapor state, and the influence of condensed water on a humidity sensor is reduced.

However, such a method of heating only the air flow in the air path has a certain influence on the lifetime and measurement accuracy of the sensor: on one hand, gas in the flue usually has certain corrosivity, and the gas flow directly blows the sensing surface of the sensor for a long time, so that the sensor is corroded; on the other hand, because the surface of the humidity sensor is in a cold state when the instrument is started in winter, when high-temperature sample gas containing humidity passes through the surface of the humidity sensor, condensed water is formed on the measuring surface of the humidity sensor when the hot air is cooled, the sensor is corroded by the condensed water, the service life of the sensor is influenced, and meanwhile, the measured value of the humidity sensor is higher.

Therefore, a new and effective technical scheme is urgently needed to be provided, so that the sensor is prevented from being exposed to air flow for a long time in the sampling process, condensed water is prevented from being generated on the sensing surface of the sensor, and the service life and the measurement accuracy of the sensor are improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses only carry out the defect that heat treatment exists to the air current in the gas circuit to traditional mode, provide a take moisture content measuring device of bypass, realize the effective protection to the sensor.

The utility model discloses an adopt following technical scheme to realize: a moisture content measuring device with a bypass comprises the bypass and a gas path multi-way, wherein the gas path multi-way is provided with a gas inlet and a gas outlet, the gas outlet end is also provided with an inlet, the gas path multi-way is internally provided with a humidity sensor, the outer side of a sensing surface of the humidity sensor is provided with a cover body, and the cover body is provided with an outlet and a gas inlet; the bypass comprises a pump, one end of the pump is connected with the outlet through a pipeline, and the other end of the pump is connected with the inlet through a pipeline; in the gaseous smoke and dust that awaits measuring gets into the gas circuit through the air inlet and leads to more, because be provided with the cover body on humidity transducer's the response face, the gas that awaits measuring can not directly strike the response face of sensor, the gas that awaits measuring is under the effect of pump, get into the bypass through the income gas port, pass through the export in proper order, the pump gets into the exhaust port end discharge that the gas circuit leads to more with the entry, the gas that awaits measuring is from the response face of bypass passageway through the sensor under the effect of bypass, avoid its direct impact to the sensor, can effectively protect the sensor, the service life and the measurement accuracy.

Furthermore, the outer surface of the humidity sensor is also provided with a heat transfer sleeve, and the outer surface of the heat transfer sleeve is provided with a heating module.

Further, the heat transfer sleeve is tightly connected with the cover body in an interference fit manner.

Furthermore, the heating module adopts a PTC heating sheet with a self-constant temperature function, and the temperature of the PTC heating sheet is controlled to be about 80 ℃.

Furthermore, one side of the heat transfer sleeve in the radial direction is a plane, and one surface of the heating module is arranged on the plane of the heat transfer sleeve in an attaching mode, so that heat can be transferred conveniently.

Furthermore, the heat transfer sleeve is made of a material with high heat conductivity, such as aluminum alloy, and can rapidly transfer heat to the cover body, so that the sensing surface of the humidity sensor is baked.

Furthermore, the sensing surface of the humidity sensor is perpendicular to the direction of the air flow, so that condensed water can fall down conveniently under the action of gravity, and the measurement precision of the sensor is improved.

Furthermore, the cover body is made of corrosion-resistant materials, and a sealing ring is used for sealing between the cover body and the humidity sensor.

Furthermore, the air passages are made of heat-insulating materials.

Further, the heat insulation material is a silica gel heat insulation material.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

this scheme is through for the gas circuit leads to humidity transducer design bypass and heating and insulation construction more, avoids gaseous direct impact and the damage to humidity transducer through the design of bypass, combines to heat insulation structural design, effectively prevents to produce the comdenstion water at the sensor response face in the sampling process to can effectively improve humidity transducer's life and measurement accuracy, have better practical application and worth.

Drawings

Fig. 1 is a schematic view of an overall structure of a moisture content measuring apparatus according to an embodiment of the present invention;

fig. 2 is a schematic side view of a moisture content measuring apparatus according to an embodiment of the present invention.

Wherein: 1. the gas path is multi-pass; 2. a heating module; 3. an exhaust port; 4. an air inlet; 5. a cover body; 6. a sensing surface; 7. a bypass; 8. a heat transfer sleeve; 9. a humidity sensor; 10. a sealing surface; 11. a seal ring; 12. a thread; 15. an outlet; 16. a pump; 13. an inlet; 14. an air inlet.

Detailed Description

In order to clearly understand the above objects, features and advantages of the present invention, the present invention will be further described with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the specific embodiments disclosed below.

A moisture content measuring device with a bypass is shown in figure 1 and comprises a bypass 7 and an air path multi-way 1, wherein an air inlet 4 and an air outlet 3 are arranged on the air path multi-way 1, an inlet 13 is also arranged at the end of the air outlet 3, a humidity sensor 9 is arranged in the air path multi-way 1, a cover body 5 is arranged on the outer side of an induction surface 6 of the humidity sensor 9 and is fixed with the humidity sensor 9 through threads 12, the cover body 5 is made of corrosion-resistant materials such as stainless steel, a sealing ring 11 is adopted between the cover body 5 and the humidity sensor 9 for sealing, and an outlet 15 and an air inlet 14 are arranged on the cover body 5; the bypass 7 comprises a pump 16, which pump 16 is connected at one end to the outlet 15 and at the other end to the inlet 13 via a line. The gaseous smoke and dust of awaiting measuring gets into the gas circuit through air inlet 4 and leads to 1 interior because be provided with the cover body 6 on humidity transducer 9's the response face 6, the gas that awaits measuring can not directly strike the response face 6 of sensor, the gas that awaits measuring is under pump 16's effect, get into bypass 7 through gas inlet 14, pass through export 15 in proper order, pump 16 and entry 13 get into 3 end discharges of gas vent that the gas circuit leads to 1 more, the gas that awaits measuring passes through the response face 6 of sensor from the bypass passageway under the effect of bypass 7, avoid its direct impact to the sensor, can effectively protect the sensor, improve its life and measurement accuracy.

With continued reference to fig. 1, the outer surface of the humidity sensor 9 is further provided with a heat transfer sleeve 8, and the heat transfer sleeve 8 is tightly connected with the cover body 5 in an interference fit manner; the outer surface of the heat transfer sleeve 8 is provided with the heating module 2, the heating module 2 is a PTC heating sheet with a self-constant temperature function, the temperature of the PTC heating sheet is controlled to be about 80 degrees, as shown in FIG. 2, in consideration of the special shape of the PTC heating sheet, one side of the heat transfer sleeve 8 in the radial direction is a plane, one surface of the heating module 2 is attached to the plane of the heat transfer sleeve 8 so as to facilitate heat transfer, the heat transfer sleeve 8 and the heating module can be firmly wound and fixed through a high-temperature adhesive tape, and other fixing modes can be adopted; in addition, in the present embodiment, the heating module 2 may be replaced by a heating rod or a heating film instead of a PTC heating sheet having a self-constant temperature function, and the selection of the heating module is freely selectable by those skilled in the art according to actual needs, and is not specifically described herein. In addition, the heat transfer sleeve 8 is made of a material with relatively high thermal conductivity such as aluminum alloy, and can rapidly transfer heat to the cover body 5, so that the sensing surface 6 of the humidity sensor 9 is baked.

Meanwhile, in order to improve the heating and heat-insulating effect, the air passage multi-way 1 is made of a heat-insulating material, and the heat-insulating material is made of heat-insulating materials such as silica gel.

In this embodiment, the direction setting of humidity transducer 9's response face 6 perpendicular to air current, the condensed water of being convenient for relies on the action of gravity whereabouts, improves sensor measurement accuracy.

In fig. 1, reference numeral 10 is a sealing surface of a silica gel gas path, which is in interference fit with a cover body 5 to play a role in sealing the gas path, and when humidity is measured, gas flow enters the gas path of a humidity measuring device through a gas inlet 4, is discharged through a gas outlet 3, and does not directly pass through a sensing surface of a humidity sensor through the ingenious design of a bypass 7 and the cover body 5; when humidity needs to be detected, the pump 16 is started, and a small amount of gas flows through the sensor sensing surface 6 through the gas inlet 14, passes through the outlet 15 and finally enters the main gas path through the inlet 13. Therefore, the sensor is not exposed to the air flow for a long time in the sampling process, the sensor is prevented from being corroded by the air, and the service life of the sensor is prolonged; meanwhile, through the design of the heat transfer sleeve and the like, the condensate water is effectively prevented from being generated on the sensing surface of the sensor in the sampling process, and the service life and the measurement precision of the humidity sensor are effectively improved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. The moisture content measuring device with the bypass is characterized by comprising a bypass (7) and a gas path multi-way (1), wherein the gas path multi-way (1) is provided with a gas inlet (4) and a gas outlet (3), the side surface of the gas outlet (3) end is also provided with an inlet (13), the gas path multi-way (1) is internally provided with a humidity sensor (9), the outer side of a sensing surface (6) of the humidity sensor (9) is provided with a cover body (5), and the cover body (5) is provided with an outlet (15) and a gas inlet (14); the bypass (7) comprises a pump (16), one end of the pump (16) is connected with the outlet (15) through a pipeline, and the other end of the pump is connected with the inlet (13) through a pipeline.

2. The bypassed moisture content measuring device according to claim 1 further comprising: the outer surface of the humidity sensor (9) is also provided with a heat transfer sleeve (8), and the outer surface of the heat transfer sleeve (8) is provided with a heating module (2).

3. The bypassed moisture content measuring device according to claim 2 further comprising: the heat transfer sleeve (8) is tightly connected with the cover body (5) in an interference fit manner.

4. The bypassed moisture content measuring device according to claim 2 further comprising: the heating module (2) adopts a PTC heating sheet with a self-constant temperature function.

5. The bypassed moisture content measuring device according to claim 4 further characterized by: one side of the heat transfer sleeve (8) in the radial direction is a plane, and one surface of the heating module (2) is arranged on the plane of the heat transfer sleeve (8) in an attaching mode.

6. The bypassed moisture content measuring device according to claim 2 further comprising: the heat transfer sleeve (8) is made of a material with high heat conductivity.

7. The bypassed moisture content measuring device according to claim 1 further comprising: the sensing surface (6) of the humidity sensor (9) is arranged perpendicular to the direction of the air flow.

8. The bypassed moisture content measuring device according to claim 1 further comprising: the cover body (5) is made of corrosion-resistant materials, and the space between the cover body (5) and the humidity sensor (9) is sealed by a sealing ring (11).

9. The bypassed moisture content measuring device according to claim 1 further comprising: the gas path multi-way (1) is made of heat insulation materials.

10. The bypassed moisture content measuring device of claim 9 wherein: the heat insulation material is a silica gel heat insulation material.