Alarm prompter

Abstract

The utility model discloses an alarm prompter. According to the scheme, the alarm prompter comprises a base; the bottom of the shaft bracket is rotationally arranged on the base, and the rotating axis of the shaft bracket extends in the vertical direction; the sliding sleeve is connected to the shaft bracket, can synchronously rotate with the shaft bracket and can vertically move relative to the shaft bracket; the adjusting frame is provided with a first end and a second end which are opposite, and the first end of the adjusting frame is rotationally connected to the top of the sliding sleeve; the measuring air duct comprises a shell, an axial flow fan and a detection module, the axial flow fan and the detection module are sequentially arranged in the shell in the axial direction, and the detection module is configured to detect components and / or concentration of airflow penetrating through the interior of the shell; the alarm module is in signal connection with the detection module and gives an alarm when the gas component and / or the concentration detected by the detection module are / is out of a preset threshold range; wherein the shell is rotatably connected with the top of the shaft bracket, the shell is movably connected with the second end of the adjusting frame, and the connecting positions of the adjusting frame and the shaft bracket with the shell are spaced in the axial direction of the shell.

Description

Technical Field

[0001] This application relates to the field of alarm notification, and in particular to an alarm notification device. Background Technology

[0002] Ships using LNG, methanol, liquid hydrogen, or other fuels require large storage tanks. Maintenance and repair of these tanks necessitate personnel entering the interior. Due to the enclosed and poorly ventilated nature of these tanks, toxic gases can easily accumulate or oxygen levels may be insufficient, posing a significant risk of poisoning, asphyxiation, and other accidents that threaten the lives of workers. Therefore, when working in confined spaces such as inside storage tanks, it is essential to have a system for real-time monitoring of environmental parameters such as toxic gas and oxygen concentrations, and for issuing timely alarms in case of abnormalities.

[0003] However, existing alarm systems have the following shortcomings:

[0004] 1. The equipment has difficulty in making effective directional adjustments in complex spaces, resulting in incomplete detection coverage.

[0005] 2. Due to uneven local airflow, gas concentrations may vary in certain areas, leading to inaccurate test results and a risk of missed detections.

[0006] The above shortcomings result in low detection accuracy and low practical value of existing alarm indicators. Utility Model Content

[0007] To address the aforementioned issues, this application provides an alarm indicator.

[0008] According to an embodiment of this application, an alarm indicator is disclosed, comprising: a base;

[0009] A shaft bracket, the bottom of which is rotatably mounted on the base, the axis of rotation of which extends vertically;

[0010] A sliding sleeve, which is connected to the shaft frame, can rotate synchronously with the shaft frame, and can move vertically relative to the shaft frame;

[0011] An adjusting bracket has a first end and a second end opposite to each other, the first end of the adjusting bracket being rotatably connected to the top of the sliding sleeve;

[0012] A measuring duct includes a housing, and an axial flow fan and a detection module arranged sequentially along an axial direction inside the housing. The axial flow fan is configured to push airflow into and through the interior of the housing, and the detection module is configured to detect the composition and / or concentration of the airflow passing through the interior of the housing.

[0013] An alarm module is signal-connected to the detection module and alarms when the gas composition and / or concentration detected by the detection module is outside a preset threshold range.

[0014] The outer shell is rotatably connected to the top of the shaft frame, the outer shell is movably connected to the second end of the adjusting frame, the connection points of the adjusting frame and the shaft frame to the outer shell are spaced apart along the axial direction of the outer shell, and the rotation axis of the adjusting frame is offset from the rotation axis of the shaft frame.

[0015] In one exemplary embodiment, the housing is rotatably connected to the second end of the adjustment frame;

[0016] An adjustment sleeve is fitted around the outer periphery of the outer shell, and the adjustment sleeve is rotatably connected to the second end of the adjustment frame.

[0017] The adjustment frame, the adjustment sleeve, and the rotation axis of the outer shell are parallel to each other and extend in the horizontal direction.

[0018] In one exemplary embodiment, the adjusting frame extends in an arc shape, with a first end and a second end respectively located at opposite axial ends of the adjusting frame; the arc-shaped convex surface of the adjusting frame faces outward; and / or

[0019] The adjusting frame is provided with two first adjusting arms at intervals on the side near the sliding sleeve, and the first adjusting arms are rotatably connected to the sliding sleeve by a first pin.

[0020] The adjusting frame is provided with two second adjusting arms at intervals on the side away from the sliding sleeve, the adjusting sleeve is located between the two second adjusting arms, and the radial sides of the adjusting sleeve are rotatably connected to the second adjusting arms by second pins;

[0021] The adjusting sleeve can slide along the axial direction of the outer shell.

[0022] In one exemplary embodiment, the base is provided with a fixed-axis tube, the fixed-axis tube is sleeved on the outer periphery of the shaft frame, and the shaft frame can rotate relative to the fixed-axis tube;

[0023] The sliding sleeve is fitted around the outer periphery of the fixed-axis tube and can slide vertically along the outer periphery of the fixed-axis tube.

[0024] In one exemplary embodiment, the top of the shaft frame is provided with two shaft arms spaced apart, the shaft arms extending upward, the measuring air duct is located between the two shaft arms, and the radial sides of the housing are rotatably connected to the shaft arms by a third pin.

[0025] In one exemplary embodiment, the top of the sliding sleeve is provided with clearance notches on opposite sides, and the two shaft arms are located within the clearance notches, the horizontal dimension of the shaft arms matching the horizontal dimension of the clearance notches; wherein:

[0026] As the sliding sleeve moves vertically relative to the shaft bracket, the shaft arm can slide up and down along the clearance notch.

[0027] In one exemplary embodiment, the alarm indicator further includes: a first driving member disposed on the base, wherein the driving end of the first driving member is rotatably driven connected to the shaft frame;

[0028] The second driving component is disposed on the base, and the driving end of the second driving component can drive the sliding sleeve to move vertically relative to the shaft frame.

[0029] In one exemplary embodiment, the sidewall of the sliding sleeve is provided with a groove;

[0030] The second driving component includes a second servo motor and a rotating base. The second servo motor is mounted on the base, and its driving end rotates to drive the rotating base. A protruding pin is provided on the end face of the rotating base facing away from the second servo motor. The protruding pin is located outside the rotation axis of the rotating base and extends into the groove. The inner top surface of the groove abuts against the protruding pin. Wherein:

[0031] When the second servo motor drives the rotating seat to rotate, the protruding pin can rotate with the rotating seat and drive the sliding sleeve to move up and down relative to the shaft frame.

[0032] In one exemplary embodiment, the measuring duct further includes a heating element located inside the housing and on the air inlet side of the housing;

[0033] The outer casing includes an air inlet sleeve and a measuring sleeve arranged sequentially along the axial direction, the heating element is disposed inside the air inlet sleeve, and the detection module is disposed inside the measuring sleeve;

[0034] The adjusting frame is movably connected to the air intake sleeve, and the measuring sleeve is rotatably connected to the top of the shaft frame;

[0035] The measuring sleeve has a filter screen at the end opening away from the air intake sleeve; the inner diameter of the measuring sleeve gradually decreases in the direction away from the air intake sleeve.

[0036] In one exemplary embodiment, the detection module includes one or more of an electrochemical gas sensor, an infrared gas sensor, a catalytic combustion sensor, and a photoionization detection sensor.

[0037] The technical solutions provided by the embodiments of this application have at least the following beneficial effects:

[0038] The alarm indicator disclosed in this application utilizes the cooperation of a shaft frame, sliding sleeve, and adjusting frame to adjust the spatial angle of the measuring air duct, achieving multi-directional precise positioning of the measuring air duct. This allows the measuring air duct to adaptably adjust its direction and position in complex spaces and environments, improving the comprehensiveness and accuracy of environmental parameter detection. Furthermore, in confined spaces with poor ventilation and gas accumulation, the measuring air duct of this application can agitate the airflow by activating an axial flow fan, resulting in a more uniform gas concentration within the confined space. The axial flow fan draws in airflow and passes it through the outer casing. The detection module then detects the composition and / or concentration of the airflow passing through the casing, improving detection accuracy and reducing the risk of missed detections. When the gas composition and / or concentration detected by the detection module falls outside a preset threshold range, the alarm module responds and sounds an alarm, facilitating staff alert and improving safety.

[0039] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the principles of this application.

[0041] Figure 1 This is a schematic diagram of the structure of an alarm indicator provided in one embodiment of this application.

[0042] Figure 2 An exploded structural diagram of a measuring duct provided in an embodiment of this application.

[0043] Figure 3 A side view of an alarm indicator provided in an embodiment of this application.

[0044] Figure 4 An exploded structural diagram of an alarm indicator provided in an embodiment of this application.

[0045] The reference numerals in the attached drawings are explained as follows: 1-Measuring air duct, 11-Outer shell, 111-Inlet sleeve, 112-Measuring sleeve, 12-Axial flow fan, 13-Detection module, 14-Heating element, 15-Filter screen, 2-Base, 21-Fixed shaft tube, 3-Shaft bracket, 31-Shaft arm, 32-Third pin, 4-First drive component, 41-First servo motor, 5-Sliding sleeve, 51-Avoidance notch, 52-Groove, 6-Second drive component, 61-Second servo motor, 62-Rotating seat, 621-Protruding pin, 7-Adjusting bracket, 71-Adjusting sleeve, 72-First adjusting arm, 73-First pin, 74-Second adjusting arm, 75-Second pin. Detailed Implementation

[0046] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this application will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art.

[0047] In the description of this utility model, all the connection relationships mentioned do not refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0048] In the description of this utility model, unless otherwise explicitly defined, terms such as setting, installing, and connecting should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0049] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0051] This application provides an alarm indicator for detecting the concentration of harmful gases and / or oxygen, and issuing an alarm for abnormal detection data. This alarm indicator is particularly suitable for confined spaces. For example, a confined space can be inside a storage tank, inside a room, or similar space.

[0052] This application uses the internal space of a fuel storage tank as an example of a limited space to introduce the alarm indicator.

[0053] Figure 1 A structural diagram of the alarm indicator is shown.

[0054] The alarm indicator includes a measuring air duct 1, a base 2, a shaft bracket 3, a sliding sleeve 5, an adjusting frame 7, and an alarm module. The bottom of the shaft bracket 3 is rotatably mounted on the base 2. The axis of rotation of the shaft bracket 3 extends vertically, allowing it to rotate vertically and adjust its rotation angle. The sliding sleeve 5 is connected to the shaft bracket 3 and can rotate synchronously with it, and can also move vertically relative to it, thus adjusting its height on the shaft bracket 3. The adjusting frame 7 has a first end and a second end, with the first end rotatably connected to the top of the sliding sleeve 5. The measuring air duct 1 includes a housing 11, which is rotatably connected to the top of the shaft bracket 3 and movably connected to the second end of the adjusting frame 7. The connections of the adjusting frame 7 and the shaft bracket 3 to the housing 11 are spaced apart axially along the housing 11. The axis of rotation of the adjusting frame 7 is offset from the axis of rotation of the shaft bracket 3, so that the rotation directions of both the adjusting frame 7 and the measuring air duct 1 are offset from the rotation direction of the shaft bracket 3.

[0055] The measuring air duct 1, adjusting frame 7, and sliding sleeve 5 can rotate synchronously with the shaft frame 3. By adjusting the rotation angle of the shaft frame 3 in the vertical direction, the rotation angle of the measuring air duct 1 in the vertical direction can be adjusted. Simultaneously, the adjusting frame 7 can rise and fall relative to the shaft frame 3 with the sliding sleeve 5, and the adjusting frame 7 can rotate relative to the sliding sleeve 5 through its first end. The outer shell 11 of the measuring air duct 1 is rotatably connected to the shaft frame 3 on one side along the axial direction, while the other side of the outer shell 11 is movably connected to the second end of the adjusting frame 7. The side of the measuring air duct 1 connected to the shaft frame 3 is positioned in height, while the side of the measuring air duct 1 connected to the adjusting frame 7 can adjust its spatial angle by adjusting the rising and falling position of the sliding sleeve 5 relative to the shaft frame 3. Furthermore, the rotation direction of the shaft frame 3 is offset from the rotation direction of the adjusting frame 7 and the measuring air duct 1, allowing the measuring air duct 1 to adaptably adjust its orientation and position in complex spaces and environments, improving the comprehensiveness and accuracy of environmental parameter detection.

[0056] The measuring duct 1 of this application further includes an axial flow fan 12 and a detection module 13 arranged sequentially along the axial direction inside the housing 11. The axial flow fan 12 is configured to push airflow into and through the interior of the housing 11, and the detection module 13 is configured to detect the composition and / or concentration of the airflow passing through the interior of the housing 11. An alarm module is signal-connected to the detection module 13 and alarms in response to the detection module 13 detecting that the gas composition and / or concentration is outside a preset threshold range.

[0057] In a confined space that is closed, poorly ventilated, and prone to gas accumulation, the measuring duct 1 of this application can agitate the airflow within the confined space by activating the axial flow fan 12, resulting in a more uniform gas concentration inside the space. The axial flow fan 12 draws in the airflow and passes it through the outer casing 11. The composition and / or concentration of the airflow passing through the outer casing 11 is then detected by the detection module 13, improving detection accuracy and reducing the risk of missed detections. When the gas composition and / or concentration detected by the detection module 13 is outside a preset threshold range, the alarm module can respond to the detection module 13 and sound an alarm, facilitating staff alert and improving safety.

[0058] The alarm module can trigger an alarm when the detection module 13 detects that the gas composition contains toxic gas. Alternatively, the alarm module can trigger an alarm when the detection module 13 detects that the concentration of toxic gas exceeds a preset threshold range, or the concentration of flammable gas exceeds a preset threshold range, or the oxygen concentration is below a preset threshold range. Alternatively, the alarm module can trigger an alarm when the detection module 13 detects that the gas composition contains toxic gas and when the gas concentration is outside the preset threshold range.

[0059] Figure 2 An exploded view of the structure of the measuring duct 1 is shown.

[0060] The measuring duct 1 of this application includes a housing 11, and an axial flow fan 12 and a detection module 13 arranged sequentially along the axial direction inside the housing 11.

[0061] The outer casing 11 is axially continuous to allow airflow to pass smoothly through it. Correspondingly, the outer casing 11 has an air inlet side and an air outlet side. The axial flow fan 12 can drive the airflow at high speed from the air inlet side to the air outlet side of the outer casing 11, which promotes uniform gas diffusion and makes the detection module 13 more comprehensive and accurate in detecting the concentration of the airflow. This effectively avoids detection errors caused by local gas concentration differences in a confined space and improves the reliability of the detection.

[0062] Specifically, the outer casing 11 includes an air inlet sleeve 111 and a measuring sleeve 112 arranged sequentially along the axial direction. Both the air inlet sleeve 111 and the measuring sleeve 112 are cylindrical structures that extend through the axial direction. The axial opening of one end of the air inlet sleeve 111 is connected to the axial opening of one end of the measuring sleeve 112 to achieve splicing. The air inlet side of the outer casing 11 is located at the other axial opening of the air inlet sleeve 111, and the air outlet side is located at the other axial opening of the measuring sleeve 112.

[0063] The axial flow fan 12 is configured to push airflow into and through the interior of the housing 11. In this embodiment, the axial flow fan 12 includes a motor and axial flow blades, and is installed inside the housing 11 to push the airflow at high speed, promote uniform gas diffusion, eliminate local concentration differences in a limited space, make the detection results more accurate, and improve the comprehensiveness and accuracy of the detection.

[0064] The detection module 13 is configured to detect the composition and / or concentration of the airflow passing through the interior of the housing 11. In this embodiment, the detection module 13 includes one or more of an electrochemical gas sensor, an infrared gas sensor, a catalytic combustion sensor, and a photoionization detection sensor. The detection module 13 of this application integrates an electrochemical gas sensor, an infrared gas sensor, a catalytic combustion sensor, and a photoionization detection sensor, enabling simultaneous real-time monitoring of multiple gases within a confined space. Specifically, the electrochemical gas sensor is used to detect the concentration of toxic gases such as hydrogen sulfide, carbon monoxide, and ammonia. The infrared gas sensor is used to detect the concentration of greenhouse gases or flammable gases such as carbon dioxide and methane. The catalytic combustion sensor is used to detect the concentration of combustible gases. The photoionization detection PID sensor is used to detect the concentration of volatile organic compounds.

[0065] If the confined space is in a low-temperature, high-humidity environment, toxic and harmful gases will exhibit low evaporation rates and be prone to condensation or low concentrations, which will affect the detection accuracy and sensitivity of the detection module 13. Furthermore, the measuring air duct 1 of this application also includes a heating element 14, located inside the outer casing 11 and on the air inlet side of the outer casing 11. When the airflow enters the measuring air duct 1 through the outer casing 11 under the action of the axial flow fan 12, it needs to be heated by the heating element 14 first. The heating element 14 and the axial flow fan 12 work together to heat the low-temperature, high-humidity airflow entering the outer casing 11, increasing molecular kinetic energy, reducing the condensation or low concentration of toxic and harmful gases that cause differences in gas concentration within the space, improving detection sensitivity, and simultaneously evaporating water vapor to avoid humidity interference, thus improving detection accuracy and sensitivity and enhancing the accuracy of the detection results.

[0066] In this embodiment, the detection module 13 is disposed inside the measuring sleeve 112, and the heating element 14 is disposed inside the air inlet sleeve 111, so that the airflow heated by the heating element 14 can be detected by the detection module 13, thereby improving the detection accuracy. In addition, the axial flow fan 12 can be disposed inside the air inlet sleeve 111 or the measuring sleeve 112. In this embodiment, the axial flow fan 12 is located inside the measuring sleeve 112.

[0067] In this embodiment, the heating element 14 includes a plurality of heating fins, which are spaced apart on the inner side of the outer shell 11. A gap is formed between adjacent heating fins to allow airflow to pass through. Airflow passing through the heating fins can achieve airflow heating. Heating the airflow can increase the activity of gas molecules and evaporate the water vapor carried by the airflow.

[0068] Furthermore, a filter screen 15 is provided at the end opening of the measuring sleeve 112 away from the intake sleeve 111. The filter screen 15 is used to filter large particulate impurities to ensure the purity of the airflow.

[0069] Furthermore, the inner diameter of the measuring sleeve 112 gradually decreases in the direction away from the air intake sleeve 111. This guides the airflow, facilitating detection by the detection module 13.

[0070] Figure 3 A side view of the alarm indicator is shown. Figure 4 An explosion diagram of the alarm indicator is shown.

[0071] Combination Figure 1 , Figure 3 and Figure 4 The alarm indicator includes a base 2, a shaft bracket 3, a sliding sleeve 5, an adjustment bracket 7, an alarm module, and the aforementioned measuring air duct 1.

[0072] The base 2 facilitates the positioning and connection of the equipment, making it easy to fix the equipment inside the storage tank.

[0073] The bottom of the shaft bracket 3 of this application is rotatably mounted on the base 2, and the axis of rotation of the shaft bracket 3 extends vertically. The top of the shaft bracket 3 is connected to the housing 11.

[0074] The shaft bracket 3 drives the outer casing 11 to rotate vertically and can adjust the rotation angle, thereby adjusting the vertical rotation position of the measuring air duct 1.

[0075] Reference Figure 4 The shaft frame 3 extends vertically, and two shaft arms 31 are spaced apart at the top of the shaft frame 3. The shaft arms 31 extend upward, and the measuring air duct 1 is located between the two shaft arms 31. The radial sides of the outer casing 11 are connected to the shaft arms 31 by a third pin 32.

[0076] Specifically, the third pin 32 is formed between the two inner sidewalls of the two shaft arms 31. The outer wall of the housing 11 is provided with a positioning hole that matches the position and shape of the third pin 32. The shaft bracket 3 is connected and positioned on the housing 11 through the shaft arms 31 located on both radial sides of the housing 11, thereby improving the support stability of the housing 11. In practice, the shaft arms 31 can extend vertically upward or diagonally upward. In addition, the top of the shaft bracket 3 can also be provided with only one shaft arm 31, which is connected and positioned to the housing 11.

[0077] In some embodiments, the alarm indicator further includes a first drive component 4, which is disposed on the base 2, and its drive end is rotatably connected to the shaft frame 3. Specifically, the first drive component 4 includes a first servo motor 41, which is tractively connected to the bottom of the shaft frame 3 and can drive the shaft frame 3 to rotate around a vertical axis of rotation. It can also control the rotation angle of the shaft frame 3, improving automation and safety. Furthermore, the opening and closing of the first drive component 4 can be controlled via a mobile terminal, thereby achieving remote control of the angle of the measuring duct 1. In addition, in other embodiments, manual adjustment is also possible, such as allowing the bottom of the shaft frame 3 to rotate relative to the base 2, or fixing the shaft frame 3 to the base 2 using screws.

[0078] The sliding sleeve 5 of this application is connected to the shaft bracket 3, can rotate synchronously with the shaft bracket 3, and can move vertically relative to the shaft bracket 3.

[0079] To achieve synchronous rotation between the sliding sleeve 5 and the shaft bracket 3, clearance notches 51 are provided on opposite sides of the top of the sliding sleeve 5. Two shaft arms 31 are located within the clearance notches 51, and the horizontal dimensions of the shaft arms 31 match the horizontal dimensions of the clearance notches 51. It should be noted that at least one shaft arm 31 is outside the rotation axis of the shaft bracket 3, and the two shaft arms 31 are inserted one-to-one into the clearance notches 51 on the sliding sleeve 5. When the shaft bracket 3 rotates, the two shaft arms 31 can move the sliding sleeve 5 to rotate synchronously with the shaft bracket 3 through the clearance notches 51.

[0080] When the sliding sleeve 5 moves vertically relative to the shaft bracket 3, the shaft arm 31 can slide up and down along the clearance notch 51. In fact, the horizontal dimension of the clearance notch 51 and the horizontal dimension of the shaft arm 31 are matched to ensure the accuracy of the shaft bracket 3 driving the sliding sleeve 5 to rotate synchronously. At the same time, the horizontal dimension of the clearance notch 51 needs to be slightly larger than the horizontal dimension of the shaft arm 31 to ensure that the shaft arm 31 can slide vertically with the sliding sleeve 5 relative to the clearance notch 51.

[0081] In some other embodiments, the sliding sleeve 5 and the shaft bracket 3 can also achieve synchronous rotation through matching protrusions and recesses. The horizontal width of the recess matches the protrusion, while the length of the recess needs to extend vertically to ensure that the sliding sleeve 5 can move vertically relative to the shaft bracket 3.

[0082] In some embodiments, the alarm indicator further includes a second driving member 6, which is disposed on the base 2. The driving end of the second driving member 6 can drive the sliding sleeve 5 to move vertically relative to the shaft frame 3. At this time, the opening and closing of the second driving member 6 can also be controlled by a mobile terminal, thereby realizing remote control of the angle of the measuring duct 1.

[0083] Specifically, the side wall of the sliding sleeve 5 is provided with a groove 52. The second driving component 6 of this application includes a second servo motor 61 and a rotating seat 62. The second servo motor 61 is mounted on the base 2. The driving end of the second servo motor 61 rotates to drive the rotating seat 62. The end face of the rotating seat 62 facing away from the second servo motor 61 is provided with a protruding pin 621. The protruding pin 621 is located outside the rotation axis of the rotating seat 62 and extends into the groove 52. The inner top surface of the groove 52 abuts against the protruding pin 621. When the second servo motor 61 drives the rotating seat 62 to rotate, the protruding pin 621 can rotate with the rotating seat 62 and drive the sliding sleeve 5 to move up and down relative to the shaft frame 3.

[0084] The protruding pin 621 is eccentrically mounted on the rotating seat 62, and remains within the groove 52 of the sliding sleeve 5 throughout the rotation of the rotating seat 62. This application, through the arrangement of the rotating seat 62 and the protruding pin 621, can convert the rotational motion of the second servo motor 61 into the vertical reciprocating linear motion of the sliding sleeve 5. Furthermore, the second servo motor 61 can control the vertical position of the sliding sleeve 5 relative to the shaft frame 3 by controlling the rotation angle of the protruding pin 621, thus improving automation and safety. Alternatively, the sliding sleeve 5 can be vertically moved relative to the shaft frame 3 by a cylinder. In other embodiments, it can also be manually adjusted, such as by sliding the sliding sleeve 5 and the shaft frame 3 through a vertical groove, and fixing the sliding sleeve 5 using screws for positioning between the sliding sleeve 5 and the shaft frame 3.

[0085] In this embodiment, the groove 52 is arranged axially on the outer periphery of the sliding sleeve 5, making the groove 52 annular. Alternatively, the groove 52 may also be arranged on the radial side of the sliding sleeve 5.

[0086] In this embodiment, the sliding sleeve 5 is fitted around the outer periphery of the shaft frame 3 and can slide vertically relative to the shaft frame 3.

[0087] Specifically, the base 2 is provided with a fixed-axis tube 21, which is sleeved on the outer circumference of the shaft bracket 3, allowing the shaft bracket 3 to rotate relative to the fixed-axis tube 21. A sliding sleeve 5 is sleeved on the outer circumference of the fixed-axis tube 21 and can slide vertically along the outer circumference of the fixed-axis tube 21. The sliding sleeve 5, the fixed-axis tube 21, and the shaft bracket 3 are sequentially sleeved to improve installation stability.

[0088] The fixed-axis tube 21 is fixed on the base 2. The fixed-axis tube 21 extends vertically and is sleeved on the outer circumference of the shaft bracket 3. When the shaft bracket 3 rotates relative to the base 2 and the fixed-axis tube 21, the fixed-axis tube 21 can support and stabilize the shaft bracket 3, improving the rotational stability of the shaft bracket 3. Furthermore, the sliding sleeve 5 is sleeved on the outer circumference of the fixed-axis tube 21. When the sliding sleeve 5 moves vertically relative to the shaft bracket 3, the fixed-axis tube 21 can stabilize and guide the sliding sleeve 5, reducing the swaying of the sliding sleeve 5.

[0089] In some other implementations, the sliding sleeve 5 may be located on the radial side of the shaft bracket 3.

[0090] In this embodiment, the cross-sections of the shaft bracket 3, the fixed shaft tube 21, and the sliding sleeve 5 are all circular. In other embodiments, the cross-sections of the shaft bracket 3, the fixed shaft tube 21, and the sliding sleeve 5 may also be polygonal.

[0091] The adjusting frame 7 of this application has a first end and a second end. The first end of the adjusting frame 7 is rotatably connected to the top of the sliding sleeve 5, and the second end of the adjusting frame 7 is movably connected to the outer casing 11. The sliding sleeve 5 can adjust its vertical position on the shaft frame 3 and drive the adjusting frame 7 to move vertically relative to the shaft frame 3, thereby driving the outer casing 11, which is movably connected to the adjusting frame 7, to move vertically relative to the shaft frame 3, so that the adjusting frame 7 can adjust the angle and position of the measuring air duct 1 according to the movement of the sliding sleeve 5.

[0092] Specifically, the adjusting frame 7 has two first adjusting arms 72 spaced apart on the side near the sliding sleeve 5. The first adjusting arms 72 are rotatably connected to the sliding sleeve 5 via first pins 73. The adjusting frame 7 is connected to the sliding sleeve 5 via the two first adjusting arms 72, which improves the installation stability of the adjusting frame 7 and reduces the shaking of the adjusting frame 7 during relative rotation with the sliding sleeve 5. The second pins 75 are set on the inner sidewalls of the two first adjusting arms 72, and the sliding sleeve 5 is provided with corresponding positioning holes that match the position and size of the two second pins 75.

[0093] Meanwhile, the second end of the adjusting frame 7 is movably connected to the outer casing 11, and the top of the shaft bracket 3 is rotatably connected to the outer casing 11. The connection points of the adjusting frame 7 and the shaft bracket 3 to the outer casing 11 are spaced apart along the axial direction of the outer casing 11, and the rotation axis of the adjusting frame 7 is offset from the rotation axis of the shaft bracket 3. It should be noted that the rotation axis of the adjusting frame 7 is offset from the rotation axis of the shaft bracket 3, so that the rotation direction of the outer casing 11 of the measuring air duct 1 and the adjusting frame 7 are different from the rotation direction of the shaft bracket 3.

[0094] Specifically, the second end of the adjusting bracket 7 is connected to the first position of the outer casing 11, and the top of the shaft bracket 3 is connected to the second position of the outer casing 11. The first and second positions of the outer casing 11 are spaced upwards along the axial direction of the outer casing 11. By adjusting the vertical position of the sliding sleeve 5 relative to the shaft bracket 3, the first position of the outer casing 11 can be moved vertically. The second position of the outer casing 11 is positioned vertically and can rotate relative to the shaft bracket 3, allowing the outer casing 11 to swing in space around the second position connected to the shaft bracket 3 as the rotation center. The swing direction of the outer casing 11 is different from the rotation direction of the outer casing 11 driven by the shaft bracket 3, realizing the angle adjustment of the measuring air duct 1 in space. This allows the measuring air duct 1 to adaptably adjust its orientation and position in complex spaces and environments, improving the comprehensiveness and accuracy of environmental parameter detection.

[0095] In this example, the first position of the outer casing 11 is located on the air intake sleeve 111, and the adjusting bracket 7 is movably connected to the air intake sleeve 111. The second position of the outer casing 11 is located on the measuring sleeve 112, and the shaft bracket 3 is rotatably connected to the measuring sleeve 112. Alternatively, the adjusting bracket 7 and the shaft bracket 3 can both be connected to the air intake sleeve 111, or both can be connected to the measuring sleeve 112, or the adjusting bracket 7 can be connected to the measuring sleeve 112, and the shaft bracket 3 can be connected to the air intake sleeve 111.

[0096] Furthermore, the outer casing 11 is rotatably connected to the second end of the adjusting frame 7. The first position of the outer casing 11 is rotatably connected to the second end of the adjusting frame 7, and the second position of the outer casing 11 is rotatably connected to the shaft frame 3, thereby improving the reliability of the movement of the outer casing 11 in space.

[0097] An adjusting sleeve 71 is fitted around the outer periphery of the outer casing 11, and the adjusting sleeve 71 is rotatably connected to the second end of the adjusting frame 7. The adjusting sleeve 71 is annular and circumferentially surrounds the outer periphery of the outer casing 11. When the adjusting frame 7 moves vertically with the sliding sleeve 5, it can drive the outer casing 11 to swing through the adjusting sleeve 71. The adjusting sleeve 71 can act on the outer periphery of the outer casing 11, making the force on the measuring air duct 1 more uniform during the swinging process.

[0098] Specifically, the adjusting frame 7 has two second adjusting arms 74 spaced apart on the side away from the sliding sleeve 5. An adjusting sleeve 71 is located between the two second adjusting arms 74, and the radial sides of the adjusting sleeve 71 are rotatably connected to the second adjusting arms 74 via second pins 75. The second pins 75 are located on the opposing inner sidewalls of the two second adjusting arms 74, and the radial sides of the adjusting sleeve 71 have positioning holes matching the position and size of the second pins 75. The spaced arrangement between the two second adjusting arms 74 improves the support stability of the adjusting sleeve 71 and allows for clearance for the installation of the measuring duct 1.

[0099] In other embodiments, the second end of the adjusting frame 7 may be directly rotatably connected to the housing 11. Furthermore, the adjusting sleeve 71 can also slide relative to the axial direction of the housing 11, allowing the adjusting sleeve 71 to accommodate the vertical adjustment of the adjusting frame 7.

[0100] Furthermore, the first and second ends of the adjusting frame 7 are respectively located at the two axial ends of the adjusting frame 7, that is, the first adjusting arm 72 and the second adjusting arm 74 are respectively located at the two axial ends of the adjusting frame 7. The two first adjusting arms 72 and the two second adjusting arms 74 on the adjusting frame 7 make the adjusting frame 7 form an H shape. In addition, the adjusting frame 7 of this application extends in an arc shape, and the arc-shaped convex surface of the adjusting frame 7 faces outward, reducing interference between the adjusting frame 7 and other components.

[0101] In this embodiment, the rotation axes of the adjustment frame 7, the adjustment sleeve 71, and the outer shell 11 are parallel to each other and extend in the horizontal direction. That is, the rotation axes of the adjustment frame 7, the adjustment sleeve 71, and the outer shell 11 are all perpendicular to the rotation axis of the shaft frame 3. This allows the outer shell 11 to swing around the horizontal axis and rotate around the vertical axis where the shaft frame 3 is located to adjust the angle. This further realizes the spatial orientation adjustment of the measuring air duct 1, enabling the measuring air duct 1 to adapt to use in complex spaces and complex environments, and improving the comprehensiveness and accuracy of environmental parameter detection.

[0102] In addition, in some other embodiments, the rotation axes of the adjustment frame 7, the adjustment sleeve 71 and the outer shell 11 can also be designed at an angle to the rotation axis of the shaft frame 3, as long as they do not coincide with the rotation axis of the shaft frame 3.

[0103] The alarm module of this application is connected to the detection module 13 by signal, and alarms are triggered in response to the gas composition and / or concentration detected by the detection module 13 being outside the preset threshold range.

[0104] Specifically, the alarm module includes a buzzer alarm. The alarm module and the detection module 13 can be electrically connected through a controller. The alarm module can receive data from the detection module 13 on real-time monitoring of various gases in a confined space. When the concentration of different gases exceeds a preset threshold, the controller can control the buzzer alarm to issue an audible and visual alarm in a timely manner, thereby reminding the operators to take safety measures.

[0105] In this embodiment, the alarm module can trigger an alarm when the detection module 13 detects that the concentration of toxic gases such as hydrogen sulfide, carbon monoxide, and ammonia exceeds a preset threshold range, or when the concentration of greenhouse gases such as carbon dioxide or flammable gases such as methane exceeds a preset threshold range, or when the concentration of combustible gases exceeds a preset threshold range, or when the concentration of volatile organic compounds exceeds a preset threshold range, or when the oxygen concentration is below a preset threshold range.

[0106] In fact, both the alarm module and the controller can be installed on the base 2.

[0107] Correspondingly, the base 2 is also equipped with a power module, enabling the base 2 to provide power, signal processing, and alarm output. Specifically, the power module includes a battery pack or an external power supply, and the power module can provide a stable power input to the first drive unit 4, the second drive unit 6, the axial flow fan 12 inside the measuring air duct 1, and the detection module 13, etc.

[0108] In addition, the controller can have a built-in servo control unit, which can be used to realize the motion control of the first servo 41 and the second servo 61, thereby improving the control accuracy.

[0109] This application achieves multi-directional precise positioning of the measuring duct 1 through the cooperation of the shaft frame 3, sliding sleeve 5, and adjusting frame 7, making it suitable for various complex spaces. Furthermore, the heating element 14 and axial flow fan 12 within the measuring duct 1 effectively improve the accuracy and sensitivity of gas detection. The detection module 13 integrates multiple types of gas detection functions, enabling comprehensive detection of toxic and harmful gases and oxygen concentrations within confined spaces. It also achieves linkage with the alarm module signal connection, providing rapid response and alarm functions. The alarm indicator of this application has a reasonable structure and comprehensive functions, suitable for various confined space operation scenarios such as LNG, methanol, and liquid hydrogen storage tanks, ensuring the safety of operators.

[0110] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

Claims

1. An alarm indicator, characterized in that The alarm prompter comprises a base, an axle support, a sliding sleeve, an adjusting support, a measuring air cylinder and an alarm module. The bottom of the axle support is rotatably arranged on the base, and the rotation axis of the axle support extends vertically. The sliding sleeve is connected to the axle support and can rotate synchronously with the axle support and move vertically relative to the axle support. The adjusting support has opposite first and second ends, and the first end of the adjusting support is rotatably connected to the top of the sliding sleeve. The measuring air cylinder comprises a shell, an axial flow fan and a detection module arranged in the shell in sequence. The axial flow fan is configured to push air flow into and through the interior of the shell. The detection module is configured to detect the composition and / or concentration of the air flow passing through the interior of the shell. The alarm module is signal-connected with the detection module and alarms in response to the gas composition and / or concentration detected by the detection module being outside a preset threshold range. The shell is rotatably connected to the top of the axle support, and the shell is movably connected to the second end of the adjusting support. The connections of the adjusting support and the axle support to the shell are spaced along the axial direction of the shell. The rotation axis of the adjusting support is offset from the rotation axis of the axle support.

2. The alarm prompter of claim 1, wherein the shell is rotatably connected to the second end of the adjusting support. The outer periphery of the shell is sleeved with an adjusting sleeve, and the adjusting sleeve is rotatably connected to the second end of the adjusting support. The rotation axes of the adjusting support, the adjusting sleeve and the shell extend horizontally and are parallel to each other.

3. The alarm prompter of claim 2, wherein the adjusting support extends in an arc shape, and the first and second ends of the adjusting support are arranged at the axial ends of the adjusting support. The arc-shaped convex surface of the adjusting support faces outward. Two first adjusting arms are arranged on the side of the adjusting support close to the sliding sleeve and are rotatably connected to the sliding sleeve by first pins. Two second adjusting arms are arranged on the side of the adjusting support away from the sliding sleeve, and the adjusting sleeve is located between the two second adjusting arms. The adjusting sleeve can slide along the axial direction of the shell.

4. The alarm prompter of claim 1, wherein a fixed shaft tube is arranged on the base and sleeved with the outer periphery of the axle support. The sliding sleeve is sleeved with the outer periphery of the fixed shaft tube and can vertically slide along the outer periphery of the fixed shaft tube.

5. The alarm prompter of claim 1, wherein two axle arms are arranged on the top of the axle support and extend upward. The measuring air cylinder is located between the two axle arms, and the radial sides of the shell are rotatably connected to the axle arms by third pins.

6. The alarm prompter of claim 5, wherein the top of the sliding sleeve is provided with avoiding notches on opposite sides. The two axle arms are located in the avoiding notches, and the horizontal dimensions of the axle arms and the avoiding notches match each other. When the sliding sleeve moves vertically relative to the shaft support, the shaft arm can slide up and down along the avoiding gap.

7. The alerting device of claim 1, wherein Further comprising: A first driving member is arranged on the base, and a driving end of the first driving member is rotationally and drivingly connected to the shaft support; A second driving member is arranged on the base, and a driving end of the second driving member can drive the sliding sleeve to move vertically relative to the shaft support.

8. The alarm prompter according to claim 7, wherein, A groove is arranged on a side wall of the sliding sleeve; The second driving member comprises a second steering wheel and a rotating seat, the second steering wheel is arranged on the base, a driving end of the second steering wheel rotationally drives the rotating seat, an end surface of the rotating seat away from the second steering wheel is provided with a protruding pin, the protruding pin is arranged outside the rotating axis of the rotating seat, the protruding pin extends into the groove, and an inner top surface of the groove abuts against the protruding pin; wherein: When the second steering wheel drives the rotating seat to rotate, the protruding pin can rotate with the rotating seat and drive the sliding sleeve to move up and down relative to the shaft support.

9. The alarm prompter according to claim 2, wherein, The measuring wind cylinder further comprises a heating member, the heating member is located in the shell and located at the air inlet side of the shell; The shell comprises an air inlet sleeve and a measuring sleeve arranged in sequence along the axial direction, the heating member is arranged in the air inlet sleeve, and the detection module is arranged in the measuring sleeve; The adjusting frame is movably connected with the air inlet sleeve, and the measuring sleeve is rotationally connected with the top of the shaft support; An end portion of the measuring sleeve away from the air inlet sleeve is provided with a filter screen, and an inner diameter of the measuring sleeve gradually decreases away from the air inlet sleeve.

10. The alarm prompter according to claim 1, wherein, The detection module comprises one or more of an electrochemical gas sensor, an infrared gas sensor, a catalytic combustion sensor and a photoionization detection sensor.

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