Automatic gas probe verification device

Abstract

The utility model discloses an automatic gas probe checking device, which is used for checking the sensitivity of gas alarm detection equipment and comprises a mounting box, an automatic depressurization gas transmission assembly, a gas pipe assembly and a probe assembly, the mounting box is provided with at least one high-pressure gas source connector used for being connected with an external gas source, and the automatic pressure reduction gas conveying assembly is arranged in the mounting box and connected with the high-pressure gas source connector, receives high-pressure gas and outputs the gas in a pressure reduction mode. The probe assembly comprises a hollow cover body, one end of the gas pipe assembly is connected with a gas outlet of the automatic depressurization gas transmission assembly, and the other end is communicated to the cover body to form a detection atmosphere environment in the cover body; automatic pressure reduction output of high-pressure gas is achieved through the automatic pressure reduction gas transmission assembly, the extendable cover body capable of forming temporary atmosphere is arranged at the top end of the extendable cover body, the extendable cover body is placed in the detection range of gas alarm detection equipment to be detected, and the problem of monitoring the sensitivity of the gas alarm detection equipment in a complex production environment is well solved.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power instrumentation and control, and in particular to an automatic gas probe calibration device. Background Technology

[0002] In the nuclear power industry, high-purity hydrogen or oxygen, as well as other purified gases, are frequently required. However, hydrogen and oxygen, due to their highly reactive chemical properties, can easily lead to catastrophic consequences if leaks occur during transport, as they are colorless and odorless. Therefore, gas alarm detection equipment is essential for nuclear power plants, and this equipment needs to be calibrated regularly to ensure sufficient sensitivity.

[0003] However, in the existing technology, it is not easy to verify the sensitivity of gas alarm detection equipment. The difficulty lies in the fact that it is not easy to continuously generate a stable flow of target gas environment, and the installation location of gas alarm detection equipment in nuclear power plants is diverse, and it is difficult to create a suitable temporary gas environment in some locations. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an automatic gas probe calibration device.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an automatic gas probe calibration device for calibrating the sensitivity of gas alarm detection equipment, including a mounting box, an automatic pressure-reducing gas delivery component, a gas pipe component, and a probe component; the mounting box is provided with at least one high-pressure gas source interface for connecting to an external gas source, and the automatic pressure-reducing gas delivery component is located in the mounting box and connected to the high-pressure gas source interface, receiving high-pressure gas and reducing the pressure to output gas;

[0006] The probe assembly includes a hollow cover, and one end of the air tube assembly is connected to the air outlet of the automatic depressurization air supply assembly, while the other end is connected to the cover to form a detection atmosphere environment inside the cover.

[0007] Furthermore, in the automatic gas probe calibration device, the automatic pressure-reducing gas delivery assembly preferably includes a solenoid valve, a pressure-reducing valve, a mass flow controller, and a connecting pipe. The solenoid valve is connected to the high-pressure gas source interface, the pressure-reducing valve is located between the mass flow controller and the solenoid valve, and the outlet of the mass flow controller is connected to the gas pipe assembly.

[0008] Furthermore, in the automatic gas probe calibration device, the solenoid valve preferably includes a calibration gas solenoid valve and a compressed gas solenoid valve, the calibration gas solenoid valve and the compressed gas solenoid valve are respectively connected to a high-pressure gas source interface and connected to a pressure reducing valve.

[0009] Furthermore, in the automatic gas probe calibration device, the automatic depressurization gas delivery component preferably includes a calibration gas fine-tuning valve and a compressed gas fine-tuning valve, both of which are connected in parallel to the mass flow controller.

[0010] Furthermore, in the automatic gas probe calibration device, the automatic pressure reducing gas delivery component preferably also includes a pressure gauge, which is disposed between the pressure reducing valve and the mass flow controller.

[0011] Furthermore, in the automatic gas probe calibration device, the probe assembly preferably includes an adjustable-height and hollow support rod, the support rod comprising several straight tube sections, adjacent straight tube sections being sleeved and connected, and multiple straight tube sections being connected and installed between the gas tube assembly and the cover.

[0012] Furthermore, in the automatic gas probe calibration device, the cover is preferably a hemispherical plastic cover, and the gas tube assembly is fixedly connected to the plastic cover.

[0013] Furthermore, in the automatic gas probe calibration device, preferably the top end of the support rod is hinged to the cover, and the gas tube assembly is fixedly connected to the cover.

[0014] Furthermore, the automatic gas probe calibration device preferably also includes a human-machine interface, an I / O communication module, and a wireless signal receiver. The human-machine interface is located on the top surface of the mounting box, and the I / O communication module and the wireless signal receiver are both located inside the mounting box and are respectively connected to the automatic depressurization gas delivery assembly.

[0015] The present invention has the following beneficial effects: The present invention realizes the automatic pressure reduction and output of high-pressure gas through an automatic pressure reduction gas transmission component. The extendable cover with a top end that can form a temporary atmosphere is placed within the detection range of the gas alarm detection device being tested, which effectively solves the problem of monitoring the sensitivity of gas alarm detection devices in complex production environments. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0017] Figure 1 This is a first-view isometric view of the mounting box of the automatic gas probe calibration device in one embodiment of the present invention;

[0018] Figure 2 This is a second-view isometric view of the internal structure of the mounting box of the automatic gas probe calibration device in one embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the circuit structure of the automatic depressurization gas delivery component in one embodiment of the present invention;

[0020] Figure 4 This is an isometric view of the probe assembly of the automatic gas probe calibration device in one embodiment of the present invention;

[0021] Figure 5 For this utility model Figure 4 A magnified view showing the details at point A in the middle;

[0022] Figure 6 This is a partial cross-sectional three-dimensional structural diagram of the probe assembly in one embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100 - Installation box; 110 - High-pressure air source interface;

[0025] 200 - Automatic pressure reducing gas delivery assembly; 211 - Calibration gas solenoid valve; 212 - Compressed gas solenoid valve; 220 - Pressure reducing valve; 230 - Mass flow controller; 241 - Calibration gas fine-tuning valve; 242 - Compressed gas fine-tuning valve; 250 - Pressure gauge; 260 - Gas outlet;

[0026] 300-Tracheal assembly;

[0027] 400 - Probe assembly; 410 - Support rod; 411 - Straight tube; 420 - Cover;

[0028] 500 - Human-computer interaction interface. Detailed Implementation

[0029] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0030] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0032] Please see Figure 1 This utility model discloses an automatic gas probe calibration device, including a method for calibrating the sensitivity of gas alarm detection equipment, such as... Figures 1 to 4 As shown, the system includes an installation box 100, an automatic pressure-reducing gas delivery assembly 200, a gas tubing assembly 300, and a probe assembly 400. The installation box 100 is equipped with at least one high-pressure gas source interface 110 for connecting to an external gas source. The automatic pressure-reducing gas delivery assembly 200 is housed within the installation box 100 and connected to the high-pressure gas source interface 110, receiving high-pressure gas and reducing its pressure before outputting the gas. The high-pressure gas source interface 110 has the same structure and is used for direct connection to a high-pressure gas cylinder or other high-pressure gas source to supply the target gas.

[0033] The probe assembly 400 includes a housing 420 for creating a gas environment, and a gas tube assembly 300 with one end connected to the outlet 260 of the automatic depressurization gas delivery assembly 200 and the other end connected to the housing 420 to create a detection atmosphere environment inside the housing 420.

[0034] The probe assembly 400 allows for adaptive contact with measurement objects at varying distances from the operator's standing position. The air tube assembly 300 is a flexible hose, which can be made of common gas delivery plastic tubing, such as polytetrafluoroethylene (PTFE). While called "flexible," it possesses a certain degree of elasticity and structural strength, capable of withstanding a certain gas pressure and allowing for adjustments in posture as needed. The air tube assembly 300 outputs depressurized, homogenized gas from the automatic depressurization gas delivery assembly 200 and transports it into the enclosure 420. Within a certain time, the enclosure 420 contains a specific concentration of the target gas.

[0035] The automatic gas probe calibration device provided by this utility model can realize the automatic pressure reduction and output of high-pressure gas through the automatic pressure reduction gas delivery component 200 set in the installation box 100 of a certain size. The extendable cover 420 with a top end that can form a temporary atmosphere is placed within the detection range of the gas alarm detection device under test, which effectively solves the problem of how to conveniently monitor the sensitivity of gas alarm detection devices in complex production environments.

[0036] Specifically, in the implementation of the above embodiments of this application, such as Figure 2 and Figure 3 As shown, the automatic pressure-reducing gas delivery assembly 200 includes a solenoid valve, a pressure-reducing valve 220, a mass flow controller 230, and connecting pipes. The solenoid valve is connected to the high-pressure gas source interface 110. The pressure-reducing valve 220 is located between the mass flow controller 230 and the solenoid valve. The outlet 260 of the mass flow controller 230 is connected to the gas pipe assembly 300. The solenoid valve, pressure-reducing valve 220, mass flow controller 230, and other switches, valves, or devices are all connected according to the designed pipeline through suitable pipes. Specifically, the high-pressure gas source interface 110 is connected to the solenoid valve through a pipe, the solenoid valve is connected to the pressure-reducing valve 220 through a pipe, and the pressure-reducing valve 220 is connected to the mass flow controller 230 through another section of pipe. High-pressure gas enters the mass flow controller 230 after passing through the solenoid valve and pressure-reducing valve 220, where it is depressurized and output at a uniform and adjustable flow rate from the outlet 260 of the mass flow controller 230. The gas is then delivered to the enclosure 420 through the gas pipe assembly 300.

[0037] In conjunction with the foregoing embodiments and implementations, in another implementation, such as Figure 3As shown, the solenoid valve includes a calibration gas solenoid valve 211 and a compressed gas solenoid valve 212. Both the calibration gas solenoid valve 211 and the compressed gas solenoid valve 212 are connected to a high-pressure gas source interface 110 and a pressure reducing valve 220, respectively. Based on this implementation, the automatic gas probe calibration device provided in this application can conveniently calibrate gas alarm detection devices for two different gases. The automatic gas probe calibration device is equipped with two high-pressure gas source interfaces 110, which can simultaneously connect to two high-pressure gas cylinders, such as compressed hydrogen and compressed oxygen. The calibration gas solenoid valve 211 is connected to the high-pressure gas source interface 110 connected to high-pressure hydrogen, and the compressed gas solenoid valve 212 is connected to the high-pressure gas source interface 110 connected to compressed oxygen. When one solenoid valve is open, the other solenoid valve must be closed to prevent the presence of two gases with opposite properties in the pipeline of the automatic gas probe calibration device for an extended period, which could lead to an explosion hazard. This application uses different names to distinguish different target gases; the calibration gas can be considered as high-pressure hydrogen, and the compressed gas can be considered as high-pressure oxygen. When a gas alarm detection device needs to detect more types of target gases, more high-pressure gas source interfaces 110 can be set up, as well as corresponding solenoid valves and flow fine-tuning valves.

[0038] In conjunction with the foregoing embodiments and implementations, in yet another implementation, such as Figure 3 As shown, the automatic depressurization gas delivery assembly 200 also includes a calibration gas fine-tuning valve 241 and a compressed gas fine-tuning valve 242, both of which are connected in parallel to the mass flow controller 230. In addition to the mass flow controller 230, a pre-built device capable of automatically adjusting gas flow, a manually adjustable flow solenoid valve is also provided. The gas mass flow controller 230 is a precise, fast, and customizable measuring device, selectable from existing products in the prior art, capable of controlling and measuring parameters such as mass flow rate, volumetric flow rate, and pressure of process gases, and displaying gas temperature.

[0039] Optionally, in one embodiment of this application, such as Figure 3 As shown, the automatic pressure-reducing gas delivery assembly 200 also includes a pressure gauge 250, which is located between the pressure reducing valve 220 and the mass flow controller 230. The pressure gauge 250 allows for continuous monitoring of the gas pressure in the pipeline and facilitates proper adjustment of the solenoid valve.

[0040] Optionally, in another embodiment of this application, such as Figure 4As shown, the probe assembly 400 also includes a height-adjustable, hollow support rod 410. The support rod 410 comprises several straight tube sections 411, which are sleeved and connected to each other. These multiple straight tube sections 411 are connected and installed between the air tube assembly 300 and the cover 420. The support rod 410 adopts a multi-sleeve design, allowing for flexible adjustment of its length to accommodate different operating strokes. The sleeve design also provides good structural strength and allows for reinforcing ribs to be provided on each straight tube section 411. These reinforcing ribs can also serve as positioning structures to prevent unwarranted contraction due to relative rotation between adjacent straight tube sections 411. Furthermore, each straight tube section 411 can be provided with protruding points and grooves. The cooperation between the protruding points and grooves of adjacent straight tube sections 411 prevents the extended straight tube 411 from contracting.

[0041] If the gas alarm detection device to be tested is far away or high up, the cover 420 can be sent to the gas alarm detection device at that position by extending the support rod 410, thereby realizing the verification of the gas alarm detection device.

[0042] Optionally, in yet another embodiment of this application, such as Figure 4 and Figure 5 As shown, the cover 420 is a hemispherical plastic cover, and the tracheal tube assembly 300 is fixedly connected to the plastic cover. The hemispherical plastic cover is easy to manufacture and also facilitates connection with the tracheal tube assembly 300, which is usually made of plastic. The hemispherical shape of the cover 420 allows it to be quickly filled with the gas to form a relatively stable temporary atmosphere, making it easier to push to the gas alarm detection device. The tracheal tube assembly 300 can be glued to the hemispherical plastic cover. Typically, the opening of the flexible bronchus is located at the bottom of the hemispherical plastic cover, at the position furthest from the opening plane of the cover 420. In addition, soft cushioning pads can be placed at the opening edge of the cover 420, which can not only provide mechanical cushioning to prevent the cover 420 from being damaged by impact, but also provide a certain sealing effect.

[0043] Optionally, in certain specific implementations of one embodiment of this application, such as Figure 5 As shown, the top end of the support rod 410 is hinged to the cover 420, and the air tube assembly 300 is fixedly connected to the cover 420. The hinged connection between the support rod 410 and the cover 420 allows the cover 420 to rotate within a certain angle range, thus better adapting to the equipment to be calibrated in different positions. Furthermore, it should be noted that the hinge between the top end of the support rod 410 and the cover 420 needs to have a certain degree of damping to ensure that the cover 420 maintains its posture after rotating relative to the support rod 410.

[0044] Optionally, in other specific implementations of one embodiment of this application, such as Figure 6As shown, the cover 420 and the support rod 410 can be connected by a common nut and bolt structure. A threaded post is provided at the top of the support rod 410, which is inserted into the cover 420. Then, the nut is rotated to connect to the threaded post, and the cover 420 is clamped onto the support rod 410.

[0045] Alternatively, the tracheal assembly 300 is connected to the lowest straight pipe 411, several straight pipes 411 are interconnected, and the highest straight pipe 411 is connected to the hood 420. The gas output from the outlet 260 of the mass flow controller 230 enters the tracheal assembly 300, then enters the straight pipe 411 through the tracheal assembly 300, and reaches the hood 420 through the straight pipe 411, where the hood 420 creates a temporary gas environment.

[0046] Alternatively, the straight tube 411 can be connected to the cover 420 by a sealed hinge. The hinge between the straight tube 411 and the cover is sealed, but this does not affect the rotation of the cover 420.

[0047] Specifically, the tracheal assembly 300 includes a flexible tracheal tube and a sealing element. One end of the flexible tracheal tube is connected to the air outlet 260 through the sealing element, and the other end of the flexible tracheal tube is connected to one side of the straight tube 411 through the sealing element. Adjacent straight tubes 411 are connected to each other by a hollow portion.

[0048] Specifically, in another embodiment of this application, such as Figure 1 and Figure 2 As shown, the automatic gas probe calibration device provided in this application also includes a human-machine interface 500, an I / O communication module, and a wireless signal receiver. The human-machine interface 500 is located on the top surface of the mounting box 100. The I / O communication module and the wireless signal receiver are both located inside the mounting box 100 and are respectively connected to the automatic pressure-reducing gas delivery assembly 200. The top surface of the mounting box 100 serves as the operating surface of the automatic gas probe calibration device, and the mounting box 100 can be equipped with an openable cover. The human-machine interface 500 is located in a corner of the operating surface of the mounting box 100 and is used to display various parameters of the automatic gas probe calibration device. It can also be used by the operator to input certain commands via touch. The I / O communication module and the wireless signal receiver enable smooth communication between the automatic gas probe calibration device and the outside world. On the operating surface of the mounting box 100, a compressed gas inlet, a solenoid valve control knob, a flow fine-tuning control knob, an outlet, and a pressure reducing valve control button can be specifically installed. The outlet 260 is connected to the outlet of the mass flow controller 230 via a pipe. This outlet 260 is directly used to connect to the air pipe assembly 300. For details, please refer to [reference needed]. Figure 1 and Figure 2 As shown.

[0049] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. An automatic gas probe calibration device for calibrating the sensitivity of gas alarm detection equipment, characterized in that, It includes an installation box, an automatic pressure-reducing gas delivery component, a gas pipe component, and a probe component; the installation box is provided with at least one high-pressure gas source interface for connecting to an external gas source, and the automatic pressure-reducing gas delivery component is installed in the installation box and connected to the high-pressure gas source interface, receiving high-pressure gas and reducing the pressure to output gas; The probe assembly includes a hollow cover, and one end of the air tube assembly is connected to the air outlet of the automatic depressurization air supply assembly, while the other end is connected to the cover to form a detection atmosphere environment inside the cover.

2. The automatic gas probe calibration device according to claim 1, characterized in that, The automatic pressure-reducing gas delivery assembly includes a solenoid valve, a pressure-reducing valve, a mass flow controller, and connecting pipes. The solenoid valve is connected to the high-pressure gas source interface, the pressure-reducing valve is located between the mass flow controller and the solenoid valve, and the outlet of the mass flow controller is connected to the gas pipe assembly.

3. The automatic gas probe calibration device according to claim 2, characterized in that, The solenoid valve includes a calibration gas solenoid valve and a compressed gas solenoid valve, which are respectively connected to a high-pressure gas source interface and to a pressure reducing valve.

4. The automatic gas probe calibration device according to claim 3, characterized in that, The automatic depressurization gas delivery assembly also includes a calibration gas fine-tuning valve and a compressed gas fine-tuning valve, both of which are connected in parallel to the mass flow controller.

5. The automatic gas probe calibration device according to claim 2, characterized in that, The automatic pressure-reducing gas delivery assembly also includes a pressure gauge, which is disposed between the pressure reducing valve and the mass flow controller.

6. The automatic gas probe calibration device according to claim 1, characterized in that, The probe assembly also includes a height-adjustable and hollow support rod, which comprises several straight tube sections. Adjacent straight tube sections are sleeved and connected, and multiple straight tube sections are connected and installed between the airway assembly and the cover.

7. The automatic gas probe calibration device according to claim 1, characterized in that, The cover is a hemispherical plastic cover, and the air tube assembly is fixedly connected to the plastic cover.

8. The automatic gas probe calibration device according to claim 6, characterized in that, The top end of the support rod is hinged to the hood, and the air tube assembly is fixedly connected to the hood.

9. The automatic gas probe calibration device according to claim 1, characterized in that, The automatic gas probe calibration device also includes a human-machine interface, an I / O communication module, and a wireless signal receiver. The human-machine interface is located on the top surface of the mounting box, and the I / O communication module and the wireless signal receiver are both located inside the mounting box and are respectively connected to the automatic depressurization gas delivery assembly.

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