Miniaturized gas micro-water detection device

Abstract

The utility model relates to the technical field of measurement of trace water in gas, in particular to a miniaturized gas trace water detection device, which comprises a sleeve, a reaction tank is arranged in the sleeve, two ends of the sleeve are respectively connected with a first nut and a second nut, the first nut is provided with an air inlet communicated with the reaction tank, and the second nut is provided with an air outlet communicated with the reaction tank. An air outlet communicated with the reaction tank is formed in the second nut; and the detection rod is arranged in the reaction tank. The P2O5 micro-water sensor has the beneficial effects that the structure of the P2O5 micro-water sensor is improved, the positions of the air inlet and the air outlet are changed, and the air inlet and the air outlet are arranged on the same straight line and are short in distance, so that compared with a traditional electrochemical micro-water sensor, the P2O5 micro-water sensor has the advantages that turning of gas in a reaction tank and collision of gas molecules are reduced, almost no dead zone exists in the reaction tank, the reaction speed of the sensor is greatly increased, and the service life of the sensor is prolonged. And the measurement repeatability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring trace water in gas, in particular to a miniaturized gas trace water detection device. Background Art

[0002] In the industrial production process, the dryness of the gas has an important impact on the stability of the production process and the quality of the product. Especially in some special fields, such as petrochemicals, electric power and other industries, the dryness of the gas is even more important for the normal operation and safety of the equipment. Therefore, it is of great significance to detect the trace water content of the gas in these industries.

[0003] The P2O5 electrode sensor is based on the principle of electrolysis. The sensor body is two parallel electrodes coated with phosphorus pentoxide electrolyte and applied with DC voltage. During measurement, the sample gas flows through the electrolytic cell containing the sensor body, and the water in the gas is absorbed by phosphorus pentoxide and then electrolyzed into hydrogen and oxygen and discharged, so that the phosphorus pentoxide is regenerated. By measuring the electrolysis current, this sensor can quickly and accurately test the water content in the gas. Although the existing P2O5 electrode sensor micro-water measurement method can measure lower water content, it also has some disadvantages. The existing sensor has a short service life and needs to be re-coated regularly, which increases the cost of use and maintenance workload; the sensor has a long equilibrium time and a slow response speed. Utility Model Content

[0004] In view of the above-mentioned technical problems that the existing P2O5 electrode sensor has a short service life and needs to be repainted regularly, which increases the use cost and maintenance workload, and the sensor has a long balancing time and slow response speed, the present utility model is proposed.

[0005] The utility model aims to provide a miniaturized gas and micro-water detection device, which aims to solve the technical problems of large workload of periodic re-coating of P2O5 electrode type sensors and slow response speed.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a miniaturized gas and micro-water detection device, comprising: a sleeve, a reaction tank is provided in the sleeve, the two ends of the sleeve are respectively connected to a first nut and a second nut, the first nut is provided with an air inlet connected to the reaction tank, and the second nut is provided with an air outlet connected to the reaction tank; a detection rod, the detection rod is arranged in the reaction tank. The utility model adopts a new structure with a simple structure, and the two ends are fixed with nuts, which is convenient for assembly and maintenance; the air inlet and outlet are straight lines, and the response is faster.

[0007] As a preferred solution of a miniaturized gas micro-water detection device of the utility model, the detection rod includes a glass column and a platinum wire, and the platinum wire is wound around the outer wall of the glass column. In the utility model, an equidistant double-helix platinum wire is wound around the surface of the glass column substrate, and the spacing is reduced to produce a high-precision platinum wire electrode, which can measure a micro-water content of 20ppb at the lowest, thereby increasing the accuracy and response speed of the overall sensor.

[0008] As a preferred solution of a miniaturized gas and micro-water detection device of the utility model, wherein: the first fixing ring and the second fixing ring are respectively embedded at both ends of the sleeve, the first fixing ring is provided with a first stepped hole connecting the reaction groove and the air inlet, the aperture of the first stepped hole located on one side of the glass column is larger than the aperture of the other end, the end face of the glass column abuts against the shoulder of the first stepped hole, the second fixing ring is provided with a second stepped hole connecting the reaction groove and the air outlet, the aperture of the second stepped hole located on one side of the glass column is larger than the aperture of the other end, the end face of the other end of the glass column abuts against the shoulder of the second stepped hole, the first fixing ring is provided with a first drainage groove connecting the air inlet and the reaction groove, and the second fixing ring is provided with a second drainage groove connecting the reaction groove and the air outlet. In the utility model, the device can fix the position of the glass column by the first fixing ring and the second fixing ring, so that the detection rod remains stable during the reaction process, and the first drainage groove and the second drainage groove are further provided on the first fixing ring and the second fixing ring, respectively connecting the reaction groove with the air inlet and the air outlet, providing an air channel, and achieving the reaction.

[0009] As a preferred solution of a miniaturized gas micro-water detection device of the utility model, wherein: a third through hole connected to the reaction tank is opened on the wall of the sleeve, and the end of the platinum wire passes through the third through hole and extends out of the sleeve. In the utility model, the third through hole of the device is used to lead out the platinum wire and is sealed with structural adhesive. After the main device is completely sealed, it can withstand a certain pressure to ensure safety when testing flammable and explosive gases. As a preferred solution of a miniaturized gas micro-water detection device of the utility model, wherein: the inner wall of the sleeve is mirror-polished and has a roughness of less than 0.4. The utility model sets the inner wall of the sleeve to a roughness of less than 0.4, so that water molecules cannot adhere to the inner wall of the sampling tube, reducing the influence of residual water molecules on the measurement.

[0010] The beneficial effects of the miniaturized gas and micro-water detection device of the utility model: the utility model improves the structure of the P2O5 micro-water sensor, changes the positions of the inlet and outlet holes, and sets them in a straight line with a very short distance. Compared with the traditional electrochemical micro-water sensor, it reduces the turning of the gas in the reaction tank and the collision of gas molecules, making it almost dead-zone-free inside, greatly accelerating the response speed of the sensor and improving the measurement repeatability.

[0011] The device uses nuts to compress and fix the first fixing ring, the second fixing ring and the glass column. The two fixing rings also play a sealing role. Compared with the traditional micro-water sensor connection structure, the assembly and disassembly are simpler and more convenient, and it is also more convenient for the subsequent maintenance of the sensor, such as regular re-coating of liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0013] Figure 1 It is an overall schematic diagram of the miniaturized gas and water detection device of the utility model.

[0014] Figure 2 It is a schematic diagram of the internal section of the sleeve in the utility model.

[0015] Figure 3 It is a schematic diagram of the overall structure of the first fixing ring and the second fixing ring in the utility model.

[0016] Figure 4 It is a cross-sectional schematic diagram of the first fixing ring and the second fixing ring in the utility model. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0020] Example 1, reference Figures 1-2, is the first embodiment of the utility model, which provides a miniaturized gas micro-water detection device. The device shortens the distance between the inlet and outlet holes through a new structural design, speeds up the response speed of the sensor, and improves the measurement repeatability; it includes a sleeve 100, the sleeve 100 is a container for accommodating the detection component, a reaction tank 101 is provided in the sleeve 100, and the reaction tank 101 provides an environment for detecting the sample gas. One end of the sleeve 100 is threadedly connected to the first nut 102, and the other end is threadedly connected to the second nut 103. The first nut 102 has an air inlet 104 on one side, and the second nut 103 has an air outlet 105 on one side. The air inlet 104 and the air outlet 105 are both connected to the reaction tank 101.

[0021] The gas inlet hole 104 and the gas outlet hole 105 are both made of stainless steel, which has high strength and is impact-resistant, and is suitable for the requirements of a miniaturized gas and water sensor.

[0022] The detection rod 200 is fixedly arranged in the reaction tank 101. The detection rod 200 is arranged as a P2O5 sensor. The platinum wire is wound on the surface of the substrate with an equidistant double helix of platinum wire using a special precision process to produce a high-precision platinum wire electrode that can measure a trace water content of as low as 20ppb.

[0023] In summary, the detection rod 200 is installed into the sleeve 100, and the two ends of the detection rod 200 are clamped and fixed with the first nut 102 and the second nut 103. Compared with the traditional micro-water sensor connection structure, the assembly and disassembly are simpler and more convenient, and it is also more convenient for the subsequent maintenance of the detection device, such as regular re-coating of liquid.

[0024] This miniaturized gas and micro-water detection device adopts a new structural design. The air inlet 104 and the air outlet 105 are located at the center of the first nut 102 and the second nut 103. In actual use, a 1 / 8NPT thread is added according to the thread and a ferrule of the corresponding pipe diameter is provided. After the gas to be tested enters the sampling device from the air inlet 104, it is detected by the sampling device and flows out from the air outlet 105. The air inlet 104 and the air outlet 105 are arranged in a straight line with a very short distance. Compared with the traditional electrochemical micro-water sensor, the turning of the gas in the reaction tank 101 and the collision of gas molecules are reduced, so that there is almost no dead zone inside, which greatly speeds up the reaction speed in the reaction tank 101.

[0025] Example 2, reference Figures 1 to 4 , which is the second embodiment of the utility model, and this embodiment is based on the previous embodiment.

[0026] Specifically, the detection rod 200 includes a glass column 201 and a platinum wire 202 , and the outer wall of the platinum wire 202 is wound around and connected to the outer wall of the glass column 201 .

[0027] The detection rod 200 is a P2O5 sensor, such as Figure 2 As shown, a platinum wire 202 is wound around the surface of a glass cylinder 201 substrate in an equidistant double helix using a special precision process to produce a high-precision platinum wire electrode that can measure a trace water content of as low as 20ppb.

[0028] Specifically, the first fixing ring 106 and the second fixing ring 107 are respectively embedded in the two ends of the sleeve 100, and the first fixing ring 106 is provided with a first step hole 108 connecting the reaction groove 101 and the air inlet 104. The aperture of the first step hole 108 located on one side of the glass column 201 is larger than the aperture of the other end, and the end face of the glass column 201 abuts against the shoulder of the first step hole 108. The second fixing ring 107 is provided with a second step hole 109 connecting the reaction groove 101 and the air outlet 105. The aperture of the second step hole 109 located on one side of the glass column 201 is larger than the aperture of the other end, and the end face of the other end of the glass column 201 abuts against the shoulder of the second step hole 109.

[0029] The first stepped hole 108 and the second stepped hole 109 are disposed at both ends of the glass column 201 to not only fix the glass column 201 but also be compressed by the first nut 102 and the second nut 103 to seal the end faces.

[0030] Furthermore, a first drainage groove 110 connecting the air inlet 104 and the reaction tank 101 is opened on the first fixing ring 106, and a second drainage groove 111 connecting the reaction tank 101 and the air outlet 105 is opened on the second fixing ring 107. When both ends of the glass column 201 are respectively inserted into the first step hole 108 and the second step hole 109, air cannot enter the reaction tank 101. The first drainage groove 110 and the second drainage groove 111 are opened to enable air to enter and exit the reaction tank 101.

[0031] Furthermore, a third through hole 112 connected to the reaction tank 101 is opened on the wall of the sleeve 100, and the end of the platinum wire 202 passes through the third through hole 112 and extends out of the sleeve 100. The third through hole 112 is used to lead out the platinum wire 202 and is sealed with structural adhesive. After the main device is completely sealed, it can withstand a certain pressure to ensure safety when testing flammable and explosive gases.

[0032] Preferably, the inner wall of the sleeve 100 is mirror-polished with a roughness less than 0.4, so that water molecules cannot adhere to the inner wall of the reaction tank 101, thereby reducing the influence of residual water molecules on the measurement.

[0033] In summary, when the device is installed, the platinum wire 202 is wound around the surface of the glass cylinder 201 substrate with an equidistant double helix of platinum wire 202 using a special precision process to make a platinum wire electrode with high precision, the detection rod 200 is loaded into the sleeve 100, and the two ends of the detection rod 200 are clamped and fixed with the first fixing ring 106 and the second fixing ring 107, and finally the first nut 102 and the second nut 103 are matched with the threads on the sleeve 100 to press and seal the first fixing ring 106 and the second fixing ring 107 together with the detection rod 200. At this time, the first fixing ring 106 and the second fixing ring 107 not only have the function of fixing the detection rod 200, but also have the function of being pressed by the first nut 102 and the second nut 103 to seal the end face. Compared with the traditional micro-water sensor connection structure, assembly and disassembly are simpler and more convenient, and it is also more convenient for the subsequent maintenance of the sensor, regular re-coating of liquid, etc. The diameter of the sleeve 100 is further reduced, so that the distance between the reaction groove 101 and the detection rod 200 is further reduced, thereby enhancing the full progress of the reaction.

[0034] Improvements and upgrades in the technology for making the detection rod 200 further improve the uniformity of the platinum wire 202 and reduce the spacing between them, increasing the accuracy and response speed of the overall sensor. When the sensor is used, H3PO4 (phosphoric acid) is evenly applied to the wound detection rod 200, and the electrode electrolyzes water into P2O5. P2O5 is an adsorbent with strong water absorption, and the water in the adsorbed gas is electrolyzed into H2 and O2. Through the above reaction, when the water content of the sample gas is balanced with the water content after electrolysis, the electrolysis current is proportional to the water content, and then the current signal is detected by the signal amplifier processing circuit, and then connected to the display instrument to read a more accurate water content.

[0035] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0036] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0037] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A miniaturized gas and water detection device, characterized in that: include, A sleeve (100), wherein a reaction groove (101) is provided in the sleeve (100), and two ends of the sleeve (100) are respectively connected to a first nut (102) and a second nut (103), wherein the first nut (102) is provided with an air inlet (104) connected to the reaction groove (101), and the second nut (103) is provided with an air outlet (105) connected to the reaction groove (101); and, A detection rod (200), wherein the detection rod (200) is arranged in the reaction tank (101).

2. The miniaturized gas and water detection device according to claim 1, characterized in that: The detection rod (200) comprises a glass column (201) and a platinum wire (202), wherein the platinum wire (202) is wound around the outer wall of the glass column (201).

3. The miniaturized gas and water detection device according to claim 1, characterized in that: The first fixing ring (106) and the second fixing ring (107) are respectively embedded in the two ends of the sleeve (100); the first fixing ring (106) is provided with a first stepped hole (108) connecting the reaction groove (101) and the air inlet hole (104); the first stepped hole (108) is located on one side of the glass column (201) and has a larger hole diameter than the other end; the end surface of the glass column (201) abuts against the shoulder of the first stepped hole (108); the second fixing ring (107) is provided with a first stepped hole (108) connecting the reaction groove (101) and the air outlet hole (104); 5), the second stepped hole (109) being located on one side of the glass column (201) and having a larger aperture than the aperture at the other end, the end surface of the other end of the glass column (201) being against the shaft shoulder of the second stepped hole (109), the first fixing ring (106) being provided with a first drainage groove (110) connecting the air inlet hole (104) and the reaction groove (101), and the second fixing ring (107) being provided with a second drainage groove (111) connecting the reaction groove (101) and the air outlet hole (105).

4. The miniaturized gas and water detection device according to claim 2, characterized in that: A third through hole (112) communicating with the reaction tank (101) is formed on the wall of the sleeve (100), and the end of the platinum wire (202) passes through the third through hole (112) and extends out of the sleeve (100).

5. The miniaturized gas and water detection device according to claim 1, characterized in that: The inner wall of the sleeve (100) is mirror-polished, with a roughness of less than 0.4.

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