Dew point detection device and dew point measuring instrument

Abstract

The utility model discloses a dew point detection device and a dew point measuring instrument. The dew point detection device comprises a main chamber, a pipeline interface, a sensor interface and a bypass pipeline. The main chamber extends in a first direction. The pipeline connector is arranged at the first end of the main cavity in the first direction and used for being connected with a to-be-tested pipeline. The sensor interface is disposed at a second end of the main chamber in the first direction. The sensor interface is used for installing a dew point sensor. The first end of the bypass pipeline is connected to the side wall close to the second end of the main cavity and is in gas communication with the main cavity. The second end of the bypass pipeline extends in the second direction and communicates with the atmospheric environment. The second direction is angled to the first direction. The dew point detection device is assembled on the to-be-detected pipeline, and compared with the prior art, more parts of compressed air flowing in the to-be-detected pipeline can enter the main chamber and are exhausted to the atmospheric environment. The detection head of the dew point sensor can directly detect the dew point temperature of the small part of compressed air, and the detection accuracy is improved.

Description

Technical Field

[0001] The present application relates to the technical field of dew point detection, and in particular to a dew point detection device and a dew point measuring instrument. Background Art

[0002] Dew point sensors can be used to measure the dew point temperature of compressed gas in pipelines. The existing method for measuring the pressure dew point of pipelines is to manually screw the dew point sensor directly onto the reserved threaded opening on the measuring branch pipe to measure the dew point temperature of the compressed air flowing in the pipeline. Since the air in the branch pipe does not circulate and the internal pressure of the branch pipe is relatively high, the compressed air basically circulates in the main pipeline and hardly enters the branch pipe, resulting in a certain deviation between the detection result of the dew point sensor and the actual dew point temperature of the compressed air flowing in the main pipeline.

[0003] It should be noted that the statements in this background technology section only provide background technology related to the present application and do not necessarily constitute prior art. Utility Model Content

[0004] The present application provides a dew point detection device and a dew point measuring instrument to improve the accuracy of dew point temperature measurement.

[0005] In a first aspect, the present application provides a dew point detection device, comprising a main chamber, a pipe interface, a sensor interface and a bypass pipe. The main chamber extends in a first direction. The pipe interface is arranged at a first end of the main chamber in the first direction, and is used to connect with a pipe to be tested. The sensor interface is arranged at a second end of the main chamber along the first direction. The sensor interface is used to install a dew point sensor. The first end of the bypass pipe is connected to a side wall near the second end of the main chamber and is in gas communication with the main chamber. The second end of the bypass pipe extends in a second direction and is in communication with the atmospheric environment. The second direction is at an angle to the first direction.

[0006] In some embodiments, the main chamber includes a first chamber and a second chamber connected in sequence in its extension direction. The cross-sectional area of ​​the first chamber is smaller than the cross-sectional area of ​​the second chamber. The first end of the bypass pipe is connected to the second chamber.

[0007] In some embodiments, the second direction is perpendicular to the first direction.

[0008] In some embodiments, the pipe interface includes a quick-disconnect connector.

[0009] In some embodiments, the quick-release connector includes a first connector and a second connector. The first connector is used to connect to the pipe to be tested. The second connector is used to dock with the first connector. One of the first connector and the second connector has a groove. The other of the first connector and the second connector has a convex edge. The convex edge and the groove are used to form a concave-convex fit to enable the first connector to dock with the second connector.

[0010] In some embodiments, the first joint includes a cylindrical structure, the groove body is arranged on the inner side of the cylindrical wall of the first joint, the second joint includes a cylindrical structure, and the convex edge is arranged on the outer side of the cylindrical wall of the second joint.

[0011] In some embodiments, the sensor interface has threads and is used for threaded connection with the dew point sensor.

[0012] In some embodiments, at least one of the main chamber, the pipe interface, the sensor interface, and the bypass pipe is made of a stainless steel material.

[0013] In some embodiments, the side wall of the bypass pipe has a honeycomb sound-absorbing structure. A second aspect of the present application provides a dew point measuring instrument, comprising a dew point sensor and the dew point detection device as described above.

[0014] Based on the technical solution provided in the present application, the dew point detection device includes a main chamber, a pipe interface, a sensor interface and a bypass pipe. The main chamber extends in a first direction. The pipe interface is arranged at the first end of the main chamber in the first direction, and is used to connect with the pipe to be tested. The sensor interface is arranged at the second end of the main chamber along the first direction. The sensor interface is used to install a dew point sensor. The first end of the bypass pipe is connected to the side wall near the first end of the main chamber and is connected to the main chamber gas. The second end of the bypass pipe extends in a second direction and is connected to the atmospheric environment. The second direction is at an angle to the first direction. By assembling the dew point detection device on the pipe to be tested, the branch pipe can be connected to the atmospheric environment through the bypass pipe, thereby reducing the pressure in the branch pipe. Compared with the prior art, more of the compressed air flowing in the pipe to be tested can enter the main chamber through the pipe interface and be discharged to the atmospheric environment through the bypass pipe. After the dew point sensor is installed, the detection head of the dew point sensor can be located on the flow path of this small portion of compressed air, so the dew point temperature of this small portion of compressed air can be directly detected, and then the dew point temperature of the compressed air circulating in the main pipeline can be indirectly measured, thereby improving the accuracy of the dew point temperature measurement.

[0015] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 Schematic diagram of a dew point detection device according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0020] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0021] In the solution of the prior art, the pipeline to be tested usually includes a main pipeline and a branch pipeline arranged on the side wall of the main pipeline and connected to the main pipeline. Compressed air flows in the main pipeline, and the branch pipeline is used to install a dew point sensor. The detection head of the dew point sensor approximates the dew point temperature of the compressed air flowing in the main pipeline by detecting the dew point temperature of the environment in the branch pipeline. However, during the test, since the air in the branch pipeline is not circulated, the compressed air will gather in the main pipeline, resulting in a certain deviation between the dew point temperature in the branch pipeline and the actual dew point temperature of the compressed air in the main pipeline. On the other hand, when the compressed air flowing in the main pipeline changes (for the sake of distinction, the compressed air before the change is called the first compressed air, and the compressed air after the change is called the second compressed air), since the air in the branch pipeline does not flow, the measurement result of the dew point sensor does not reflect the dew point temperature of the second compressed air, but the dew point temperature of the first compressed air.

[0022] In order to solve the above technical problems, an embodiment of the present application provides a dew point measuring instrument. The dew point measuring instrument includes a dew point sensor and a dew point detection device. The dew point detection device is used to connect the branch pipe and the dew point sensor of the pipeline to be tested, respectively, so that a part of the compressed air in the main pipeline of the pipeline to be tested enters the dew point detection device through the branch pipe, and the dew point sensor detects the dew point temperature of the compressed air in the dew point detection device, thereby obtaining the dew point temperature of the compressed air in the main pipeline, improving the accuracy of the measurement, strengthening the control of the pressure dew point quality, providing higher quality compressed air for the production workshop, and ensuring the normal production of the production workshop.

[0023] Among them, reference Figure 1 The dew point detection device includes a main chamber 1, a pipe interface 2, a sensor interface 3 and a bypass pipe 4. The main chamber 1 extends in a first direction X. The pipe interface 2 is arranged at a first end of the main chamber 1 in the first direction X, and is used to connect with the pipe to be tested. The sensor interface 3 is arranged at a second end of the main chamber 1 along the first direction X. The sensor interface 3 is used to install a dew point sensor. The first end of the bypass pipe 4 is connected to a side wall near the second end of the main chamber 1 and is in gas communication with the main chamber 1. The second end of the bypass pipe 4 extends in a second direction Y and is in communication with the atmospheric environment. The second direction Y is at an angle to the first direction X.

[0024] By assembling the dew point detection device provided in the embodiment of the present application on the pipeline to be tested, the branch pipeline can be connected to the atmospheric environment through the bypass pipeline, thereby reducing the pressure in the branch pipeline. Compared with the prior art, more of the compressed air flowing in the pipeline to be tested can enter the main chamber 1 through the pipeline interface 2 and be discharged to the atmospheric environment through the bypass pipeline 4. After the dew point sensor is installed, the detection head of the dew point sensor can be located on the flow path of this small part of the compressed air, so the dew point temperature of this small part of the compressed air can be directly detected, and then the dew point temperature of the compressed air circulating in the main pipeline can be indirectly measured, thereby improving the accuracy of the dew point temperature measurement.

[0025] In some embodiments, the main chamber 1 includes a first chamber 11 and a second chamber 12 connected in sequence in the extension direction thereof. The cross-sectional area of ​​the first chamber 11 is smaller than the cross-sectional area of ​​the second chamber 12. The first end of the bypass pipe 4 is connected to the second chamber 12. Specifically, the end of the second chamber 12 away from the first chamber 11 is used to connect the connector of the dew point sensor, so in order to improve adaptability, the size of the second chamber 12 is substantially equal to the size of the dew point sensor. Furthermore, since the first chamber 11 is used to connect to the pipe interface 2, and the pipe interface 2 is used to connect to the branch pipe, and the size of the branch pipe is usually smaller than the size of the connector of the dew point sensor, a transition design is adopted to connect the first chamber 11 between the pipe interface 2 and the second chamber 12, so as to facilitate the establishment of a gas flow path between the branch pipe and the second chamber 12, so that after the compressed air enters the pipe interface 2, the compressed air is guided to the second chamber 12 and discharged through the bypass pipe 4 on the second chamber 12, thereby allowing the dew point sensor to directly detect the dew point temperature of the compressed air flowing in the second chamber 12, thereby improving the accuracy of the detection.

[0026] In order to facilitate manufacturing and reduce production costs, in some embodiments, the first chamber 11 and the second chamber 12 are both cylindrical. The diameter of the first chamber 11 is smaller than the diameter of the second chamber 12.

[0027] In some embodiments, the second direction Y is perpendicular to the first direction X. In this way, it is convenient to guide the compressed air into the second chamber 12 and then discharge it through the bypass pipe 4, thereby improving the smoothness of the compressed air flow and thus improving the detection accuracy.

[0028] In order to reduce the damage to the joint of the dew point sensor during the test process and extend the service life of the dew point sensor, in some embodiments, the pipe interface 2 includes a quick-release joint. Since the quick-release joint is provided, the dew point detection device can be quickly connected or quickly disassembled with the branch pipe of the pipe to be tested. When different pipes need to be tested, it is only necessary to operate the quick-release joint without removing the dew point sensor from the main chamber 1, thereby reducing the operation frequency of the joint of the dew point sensor, reducing wear, ensuring the stability of the connection, and extending the service life. Specifically, the quick-release joint includes a first joint and a second joint, the first joint is used to connect to the pipe to be tested, and the second joint is used to dock with the first joint, one of the first joint and the second joint has a groove body, and the other of the first joint and the second joint has a convex edge A. The convex edge A and the groove body are used to form a concave-convex fit to enable the first joint to dock with the second joint.

[0029] In some embodiments, the first joint includes a cylindrical structure, the groove body is arranged on the inner side of the cylinder wall of the first joint, and the second joint includes a cylindrical structure, and the flange A is arranged on the outer side of the cylinder wall of the second joint. Specifically, the groove body extends circumferentially along the inner side of the cylinder wall of the first joint to form an annular groove, and correspondingly, the flange A extends circumferentially on the outer side of the cylinder wall of the second joint to form an annular flange. When the first joint and the second joint are docked, the annular groove and the annular flange are engaged in the entire circumferential extension direction, thereby improving the stability after docking, and can improve the air tightness, reduce the risk of compressed air leakage from the connection between the first joint and the second joint, and thus improve the detection accuracy.

[0030] In some embodiments, the sensor interface 3 has threads and is used for threaded connection with the dew point sensor, thereby enabling quick assembly and disassembly between the dew point sensor and the main chamber 1 and simplifying the operation.

[0031] In some embodiments, at least one of the main chamber 1, the pipe interface 2, the sensor interface 3, and the bypass pipe 4 is made of stainless steel. This can reduce the inconvenience caused by the need to replace rusted parts, increase the service life of the dew point detection device, and save costs.

[0032] In some embodiments, the chamber 1 , the pipe interface 2 , the sensor interface 3 , and the bypass pipe 4 are made of uniform stainless steel material.

[0033] In some embodiments, the side wall of the bypass duct 4 has a honeycomb-shaped sound-absorbing structure B. This can reduce the noise generated when the compressed air flows out through the bypass duct 4.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present application, which should be included in the scope of the technical solution for protection in the present application.

Claims

1. A dew point detection device, characterized in that: include: A main chamber (1) extending in a first direction (X); A pipeline interface (2), arranged at a first end of the main chamber (1) in a first direction (X), and used for connecting to a pipeline to be tested; A sensor interface (3) is arranged at a second end of the main chamber (1) along the first direction (X), the sensor interface (3) being used for installing a dew point sensor; as well as A bypass pipe (4), wherein a first end of the bypass pipe (4) is connected to a side wall near the second end of the main chamber (1) and is in gas communication with the main chamber (1), and a second end of the bypass pipe (4) extends in a second direction (Y) and is in gas communication with the atmospheric environment, wherein the second direction (Y) forms an angle with the first direction (X).

2. The dew point detection device according to claim 1, characterized in that: The main chamber (1) comprises a first chamber (11) and a second chamber (12) which are connected in sequence in the extension direction thereof, the cross-sectional area of ​​the first chamber (11) is smaller than the cross-sectional area of ​​the second chamber (12), and the first end of the bypass pipe (4) is connected to the second chamber (12).

3. The dew point detection device according to claim 1, characterized in that: The second direction (Y) is perpendicular to the first direction (X).

4. The dew point detection device according to claim 1, characterized in that: The pipeline interface (2) comprises a quick-release joint.

5. The dew point detection device according to claim 4, characterized in that: The quick-release connector includes a first connector and a second connector, the first connector is used to be connected to the pipe to be tested, the second connector is used to dock with the first connector, one of the first connector and the second connector has a groove body, and the other of the first connector and the second connector has a convex edge (A), and the convex edge (A) and the groove body are used to form a concave-convex fit so that the first connector and the second connector can dock.

6. The dew point detection device according to claim 5, characterized in that: The first joint comprises a cylindrical structure, the groove body is arranged on the inner side of the cylindrical wall of the first joint, and the second joint comprises a cylindrical structure, the convex edge (A) is arranged on the outer side of the cylindrical wall of the second joint.

7. The dew point detection device according to claim 1, characterized in that: The sensor interface (3) has a thread and is used for threaded connection with the dew point sensor.

8. The dew point detection device according to any one of claims 1 to 7, characterized in that: At least one of the main chamber (1), the pipeline interface (2), the sensor interface (3) and the bypass pipeline (4) is made of stainless steel material.

9. The dew point detection device according to any one of claims 1 to 7, characterized in that: The side wall of the bypass pipe (4) has a honeycomb-shaped sound-absorbing structure (B).

10. A dew point measuring instrument, characterized in that: The invention comprises a dew point sensor and a dew point detection device as claimed in any one of claims 1 to 9.

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