Humidity measuring instrument

Abstract

The utility model provides a humidity measuring instrument which comprises a probe rod and a main machine which are connected in a split mode, and the probe rod comprises a front end and a rear end which are used for detecting humidity and a tail end which is connected with the main machine. The front end sequentially comprises a protective sleeve, an air inlet arranged on the protective sleeve, a sintering filter, a humidity sensor, a blowback air pipe, a fixed joint and a sleeve, the rear end comprises a cylinder body connected with the sleeve, the tail end is connected with the main machine, the sintering filter is sleeved on the humidity sensor, and the fixed joint is connected with the tail end. The protective sleeve and the fixed joint enclose an accommodating space, and the humidity sensor extends out of the accommodating space and is used for accommodating gas for detecting humidity. According to the humidity measuring instrument provided by the utility model, the stability, accuracy and reliability of detection are improved, the humidity level in gas can be accurately measured under different environmental conditions, and the application scenarios of the humidity measuring instrument are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of humidity monitoring, in particular to a humidity measuring instrument. Background Art

[0002] Humidity measuring instruments are widely used in the field of humidity measurement of nitrogen, air, inert gas and gas without corrosive media, covering power, petrochemical, metallurgy, environmental protection and scientific research. The sensor is the core component of the humidity measuring instrument. The principle is that when a trace amount of moisture in the measured gas enters the sensor sampling chamber, the water vapor is adsorbed into the sensor micropores, causing the capacitive reactance to change. The sensor converts this change into a standard linear electrical signal, which is processed by the microprocessor and displayed on the LCD screen.

[0003] However, there are some problems with humidity measuring instruments in the prior art, the main one being that the humidity sensor is not well protected and is easily contaminated. When used in harsh environments, the sensor is easily contaminated and interfered with, which affects the measurement accuracy and stability. Therefore, it is necessary to improve the prior art and improve the stability and reliability of humidity measuring instruments to ensure accurate measurement of the humidity level of the gas under various environmental conditions. Utility Model Content

[0004] There are some problems with humidity measuring instruments in the prior art, the main one being that the humidity sensor is not well protected and is easily contaminated. When used in harsh environments, the sensor is easily contaminated and disturbed, thereby affecting the measurement accuracy and stability. Therefore, the utility model provides a humidity measuring instrument for solving the above problems.

[0005] The utility model provides a humidity measuring instrument, which includes a probe rod and a main unit connected in a split manner, the probe rod including a front end for detecting humidity, a rear end and an end connected to the main unit, the front end sequentially including a protective cover, an air inlet arranged on the protective cover, a sintered filter, a humidity sensor, a back-blowing air pipe, a fixed joint and a sleeve, the rear end includes a cylinder connected to the sleeve, the end is connected to the main unit, the sintered filter is sleeved on the humidity sensor, the protective cover and the fixed joint enclose a receiving space, the humidity sensor extends out of the receiving space, and is used to receive gas for detecting humidity.

[0006] In one implementation, the back-blowing air pipe includes an elongated pipe, one end of which is connected to the protective sleeve and the fixed joint to form a receiving space, and the other end is connected to the main machine through the rear end and the end in sequence.

[0007] In one implementation, the fixing joint is a Teflon fixing joint.

[0008] In one implementation, the humidity measuring instrument further includes a front aluminum sleeve, which is sleeved on the back-blowing air pipe and abuts against one end of the fixed joint.

[0009] In one implementation, the sleeve includes a first front end sleeve and a second front end sleeve of a hollow structure connected in sequence, the first front end sleeve is sleeved on the front end aluminum sleeve, the diameters of both ends of the first front end sleeve are smaller than the middle diameter, one end portion of the first front end sleeve is embedded in the protective cover, and the other end portion is embedded in the second front end sleeve.

[0010] In one implementation, the humidity measuring instrument further includes a first O-type coil, and the first O-type coil is arranged at the connection between the fixed joint and the front aluminum sleeve.

[0011] In one implementation, the humidity measuring instrument further includes a second O-type coil, and the second O-type coil is disposed at the connection between the front aluminum sleeve and the first front sleeve.

[0012] In one implementation, the humidity measuring instrument further includes a heating rod, and the heating rod is arranged at the rear end. A notch is arranged on one side of the front end aluminum sleeve for accommodating part of the heating rod.

[0013] Beneficial effects: The humidity measuring instrument provided by the utility model forms a containing space by arranging the protective cover and the fixed joint. Meanwhile, by arranging the fixed joint, when the humidity measuring instrument is detecting, water vapor entering the containing space cannot enter the space behind the fixed joint, thereby avoiding damage of water vapor to other components. The sintered filter is arranged to filter particulate matter and impurities in the gas, thereby ensuring that the humidity sensor accurately measures the humidity. The cleanliness of the inside of the instrument is ensured by arranging the back-blowing air pipe. The utility model improves the stability, accuracy and reliability of the detection of the humidity measuring instrument, ensures the accurate measurement of the humidity level in the gas under different environmental conditions, and increases its application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the overall appearance structure of a humidity measuring instrument provided by an embodiment of the utility model;

[0015] Figure 2 for Figure 1 A schematic cross-sectional structure diagram showing an enlarged detail of region I is shown.

[0016] Among them, the symbols in the figure indicate:

[0017] 1. Protective cover; 101. Air inlet; 2. Sintered filter; 3. Humidity sensor; 4. Backflush air pipe; 5. Fixed joint; 6. First O-type coil; 7. Second O-type coil; 8. Front end aluminum sleeve; 9. First front end sleeve; 10. Second front end sleeve; 11. Cylinder; 12. Heating rod.

[0018] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0021] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0022] Combined with reference Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the overall appearance structure of a humidity measuring instrument provided by an embodiment of the utility model. Figure 2 for Figure 1The schematic cross-sectional structure diagram of the details of the I area shown is enlarged. The utility model provides a humidity measuring instrument, which includes a probe rod and a main unit (not shown) connected in a split manner. The probe rod includes a front end for detecting humidity, a rear end and a terminal connected to the main unit. The front end includes a protective sleeve 1, an air inlet 101 arranged on the protective sleeve 1, a sintered filter 2, a humidity sensor 3, a back-blowing air pipe 4, a fixed joint 5 and a sleeve in sequence. The rear end includes a cylinder 11 connected to the sleeve, and the terminal is connected to the main unit (not shown). The sintered filter 2 is sleeved on the humidity sensor 3. The protective sleeve 1 and the fixed joint 5 enclose a receiving space. The humidity sensor 3 extends out of the receiving space to receive the gas for detecting humidity. The protective sleeve 1 is used to protect the components at the front end of the probe rod from the influence of the external environment. The air inlet 101 is used to introduce external gas for humidity detection. The sintered filter 2 is used to filter particulate matter and impurities in the gas to ensure that the humidity sensor 3 accurately measures the humidity. The humidity sensor 3 is used to detect the humidity level in the gas.

[0023] Specifically, the back-blowing air pipe 4 includes a slender pipe, one end of which is connected to the protective cover 1 and the fixed joint 5 to form a receiving space, and the other end is connected to the main unit through the rear end and the end in turn. The back-blowing air pipe 4 is a device for cleaning the inside of the instrument, one end of which is connected to the gas channel inside the measuring instrument, and the other end is connected to the external air source. By supplying air to the back-blowing air pipe, clean external air can be introduced to clean and discharge impurities or pollutants in the internal gas channel. The fixed joint 5 is a Teflon fixed joint. The Teflon fixed joint is used to fix and connect various components.

[0024] Furthermore, the humidity measuring instrument further comprises a front aluminum sleeve 8, which is sleeved on the back-blowing air pipe 4 and abuts against one end of the fixed joint 5. The front aluminum sleeve 8 is used to fix the back-blowing air pipe 4 and connect the fixed joint 5.

[0025] Further, the sleeve includes a first front sleeve 9 and a second front sleeve 10 of a hollow structure connected in sequence, the first front sleeve 9 is sleeved on the front aluminum sleeve 8, the diameters of both ends of the first front sleeve 9 are smaller than the middle diameter, one end of the first front sleeve 9 is partially embedded in the protective sleeve 1, and the other end is partially embedded in the second front sleeve 10. The first front sleeve 9 and the second front sleeve 10 are used to surround and connect various components, so that the outer shell structure of the water-locking front end includes the protective sleeve 1, the first front sleeve 9, the second front sleeve 10 and the cylinder 11 in sequence.

[0026] In this embodiment, the humidity measuring instrument further includes a first O-type coil 6, which is arranged at the connection between the fixed joint 5 and the front aluminum sleeve 8. The humidity measuring instrument further includes a second O-type coil 7, which is arranged at the connection between the front aluminum sleeve 8 and the first front sleeve 9. O-type coil: used to seal and connect different components. When the humidity measuring instrument is detecting, water vapor entering the receiving space cannot enter the space behind the fixed joint, thereby preventing water vapor from damaging other components.

[0027] In addition, the humidity measuring instrument further comprises a heating rod 12, which is arranged at the rear end, and a notch is arranged on one side of the front aluminum sleeve 8 for accommodating part of the heating rod 12. The heating rod 12 is used to heat the probe rod to improve the performance and accuracy of the humidity sensor 3.

[0028] When the humidity measuring instrument provided by the utility model is in use, the front end of the probe rod extends into the detection pipe, the rear end of the probe rod can be provided with a flange for fixing, and the end of the probe rod is connected to the host, wherein the end wraps the wire in the probe rod and the back-blowing air pipe 4. The sample gas enters from the air inlet 101, passes through the sintered filter 2 and contacts the humidity sensor 3, wherein the sample gas can only enter the receiving space surrounded by the protective cover 1 and the fixed joint 5, so that the sample gas cannot enter the space at the rear end. At this time, the host obtains the data detected by the humidity sensor and analyzes it to obtain the humidity result.

[0029] In general, the humidity measuring instrument provided by the utility model forms a containing space by setting the protective cover 1 and the fixed joint 5. At the same time, through the setting of the fixed joint 5, when the humidity measuring instrument is detecting, water vapor entering the containing space cannot enter the space behind the fixed joint 5, thereby avoiding damage to other components by water vapor; the sintered filter 2 is provided to filter particulate matter and impurities in the gas, ensuring that the humidity sensor 3 accurately measures the humidity; the cleanliness of the inside of the instrument is ensured by setting the back-blowing air pipe 4; the utility model improves the stability, accuracy and reliability of the detection of the humidity measuring instrument, ensures the accurate measurement of the humidity level in the gas under different environmental conditions, increases its application scenarios, and can be applied to more severe environments.

[0030] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A humidity measuring instrument, characterized in that: It includes a probe rod and a main unit connected in a split manner, the probe rod includes a front end for detecting humidity, a rear end and an end connected to the main unit, the front end includes a protective cover, an air inlet arranged on the protective cover, a sintered filter, a humidity sensor, a back-blowing air pipe, a fixed joint and a sleeve in sequence, the rear end includes a cylinder connected to the sleeve, the end is connected to the main unit, the sintered filter is sleeved on the humidity sensor, the protective cover and the fixed joint form a receiving space, the humidity sensor extends out of the receiving space, and is used to receive gas for detecting humidity.

2. The humidity measuring instrument according to claim 1, characterized in that: The back-blowing air pipe comprises a slender pipe, one end of which is connected to the protective sleeve and the fixed joint to form a receiving space, and the other end is connected to the main machine through the rear end and the end in sequence.

3. The humidity measuring instrument according to claim 1, characterized in that: The fixed joint is a Teflon fixed joint.

4. The humidity measuring instrument according to claim 1, characterized in that: The humidity measuring instrument further comprises a front aluminum sleeve, which is sleeved on the back-blowing air pipe and abuts against one end of the fixed joint.

5. The humidity measuring instrument according to claim 4, characterized in that: The sleeve includes a first front end sleeve and a second front end sleeve of a hollow structure connected in sequence, the first front end sleeve is sleeved on the front end aluminum sleeve, the diameters of both ends of the first front end sleeve are smaller than the middle diameter, one end portion of the first front end sleeve is embedded in the protective sleeve, and the other end portion is embedded in the second front end sleeve.

6. The humidity measuring instrument according to claim 4, characterized in that: The humidity measuring instrument further comprises a first O-type coil, which is arranged at the connection between the fixed joint and the front aluminum sleeve.

7. The humidity measuring instrument according to claim 5, characterized in that: The humidity measuring instrument further comprises a second O-type coil, which is arranged at the connection between the front end aluminum sleeve and the first front end sleeve.

8. The humidity measuring instrument according to claim 4, characterized in that: The humidity measuring instrument also includes a heating rod, which is arranged at the rear end. A notch is arranged on one side of the front aluminum sleeve for accommodating part of the heating rod.

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