Device for adjusting the alarm threshold of common dust detection

Abstract

The application discloses a device for adjusting common dust detection alarm threshold, comprising: a sealed air bag loaded with gas, an open end arranged on the sealed air bag and communicated with the sealed air bag, an adjusting cylinder fixedly arranged on the open end and communicated with the open end, a piston slidingly arranged in the adjusting cylinder along the length direction of the adjusting cylinder, and a balance elastic member arranged between the piston and the end of the adjusting cylinder; further comprising a mounting plate, an adjusting rod rotatably arranged on the mounting plate, a sensor fixedly arranged on the other end of the adjusting rod and used for detecting the position of a pointer of a dust concentration detector, and the sensor being connected with an alarm; a follow-up mechanism is arranged between the adjusting rod and the piston, so that the technical problem that the alarm threshold cannot be adjusted along with temperature change in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of dust concentration detection, and more specifically, to a device for adjusting common dust detection alarm thresholds. Background Technology

[0002] Dust explosion limits include the lower explosive limit (LEL) and the upper explosive limit (LEV). The LLE refers to the lowest concentration of dust in air that can explode upon contact with an ignition source. It is generally expressed as the mass of dust contained in a unit volume, with units of g / m³. The lower the LLE, the greater the risk of a dust explosion. Different types of dust have different LLEs, and even for the same type of dust, the LLE changes with conditions. Existing dust concentration warning devices rely on manually setting a fixed threshold. An alarm is triggered based on whether the current concentration exceeds this threshold. This requires experienced personnel to set the alarm threshold for different environments, and is prone to safety issues such as untimely threshold updates due to significant changes in environmental factors, especially temperature, which causes the threshold to decrease as temperature rises.

[0003] Existing dust concentration detection devices, such as CN112986081A, disclose a dust concentration detection alarm device, including a main body, a probe, a handle, a probe, a temperature sensor, a humidity sensor, an anemometer, a thread, a warning light, an alarm bell, a data processing module, a data analysis module, a data storage module, a circuit board, a display screen, and control buttons. The main body internally houses the data processing module, data analysis module, data storage module, and circuit board. The warning light and alarm bell are located on the outside of the main body. A display screen and control buttons are located on one side of the main body, and a probe is located on the other side of the main body. A probe is located at the other end of the probe. The temperature sensor, humidity sensor, and thread are located on the outside of the probe, and an anemometer is located inside the probe. In this invention, the temperature sensor and humidity sensor facilitate the detection of temperature and humidity at the measured location, easily eliminating the influence of temperature and humidity on dust concentration. The anemometer can simultaneously detect wind speed during detection, easily eliminating the influence of wind speed on the detection results.

[0004] The purpose of the above technical solution is to improve the accuracy of dust concentration detection, that is, to remove the influence of environmental factors such as temperature on dust concentration detection. However, it cannot solve the problem that the dust concentration alarm threshold changes with temperature. Therefore, it is necessary to modify the existing detection alarm device. Summary of the Invention

[0005] The main objective of this application is to provide a device for adjusting the alarm threshold of common dust detection, so as to solve the technical problem in related technologies that the alarm threshold cannot be adjusted with temperature changes.

[0006] To achieve the above objectives, in a first aspect, this application provides a device for adjusting common dust detection alarm thresholds.

[0007] The device for adjusting the alarm threshold of common dust detection according to this application includes: a sealed airbag filled with gas, an open end formed on and connected to the sealed airbag, an adjusting cylinder fixedly disposed on and connected to the open end, and a piston slidably disposed therein along the length direction of the adjusting cylinder, wherein a balancing elastic element is disposed between the piston and the end of the adjusting cylinder.

[0008] It also includes a mounting plate, an adjusting rod rotatably mounted on the mounting plate at one end, and a sensor fixedly mounted on the other end of the adjusting rod for detecting the pointer position of the dust concentration detector, wherein the sensor is connected to an alarm.

[0009] A follower mechanism is provided between the adjusting rod and the piston.

[0010] A further improvement is that the follower mechanism includes a cable fixedly connected to the piston at one end, a first fixed pulley and a second fixed pulley for the cable to pass over, and the other end of the cable fixedly connected to the middle of the adjusting rod. A torsion spring is provided between the adjusting rod and the mounting plate to keep the cable taut.

[0011] A further improvement is that the open end is threadedly connected to one end of the adjusting cylinder, the other end of the adjusting cylinder is threadedly connected to a cover plate, and the balancing elastic element is disposed between the cover plate and the piston.

[0012] A further improvement is that a hollow or perforated float is provided inside the regulating cylinder, and the float is located between the piston and the opening end.

[0013] A further improvement is that one side of the piston has a concave spherical surface, and the float is adapted to the spherical surface.

[0014] A further improvement is that the balancing elastic element is a spring disposed between the cover plate and the piston.

[0015] A further improvement is that a guide mechanism is provided between the adjusting rod and the mounting plate.

[0016] A further improvement is that the guiding mechanism includes an arc-shaped guide groove formed on the mounting plate and a guide post fixedly mounted on the adjusting rod and cooperating with the arc-shaped guide groove.

[0017] A further improvement is that the sealing airbag is also provided with an inflation / deflation port.

[0018] A further improvement is the inclusion of an alarm, to which the sensor is electrically connected.

[0019] Compared with the prior art, the beneficial effects of this invention are as follows: the dust concentration alarm threshold can be linearly adjusted according to the change of ambient temperature, which can solve the defect of simply setting a fixed threshold in the prior art. In addition, no software control or algorithm is required, which not only makes the structure simple but also reduces the cost. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the present invention (Embodiment 1);

[0022] Figure 2 This is a schematic diagram showing the connection between the mounting plate and the adjusting rod;

[0023] Figure 3 This is a schematic diagram of the adjusting rod;

[0024] Figure 4 This is a schematic diagram of the present invention (Embodiment 2).

[0025] The components include: 1. Sealing airbag; 2. Open end; 3. Adjusting cylinder; 4. Cover plate; 5. Piston; 6. Balancing elastic element; 7. Float; 8. Cable; 9. First fixed pulley; 10. Second fixed pulley; 11. Mounting plate; 12. Adjusting rod; 13. Arc guide groove; 14. Guide column; 15. Sensor; 16. Inflation / depression port. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] In addition, the term "multiple" should mean two or more.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] Example 1:

[0033] like Figures 1-3 As shown, a device for adjusting the alarm threshold of common dust detection includes: a sealed airbag 1 filled with gas, an open end 2 opened on and connected to the sealed airbag 1, an adjusting cylinder 3 fixedly disposed on and connected to the open end 2, and a piston 5 slidably disposed inside the adjusting cylinder 3 along the length direction therein, wherein a balancing elastic element 6 is disposed between the piston 5 and the end of the adjusting cylinder 3.

[0034] It also includes a mounting plate 11, an adjusting rod 12 rotatably mounted on the mounting plate 11 at one end, and a sensor 15 fixedly mounted on the other end of the adjusting rod 12 for detecting the pointer position of the dust concentration detector. The sensor 15 is connected to the alarm.

[0035] A follower mechanism is provided between the adjusting rod 12 and the piston 5. Specifically, the follower mechanism includes a cable 8 with one end fixedly connected to the piston 5, a first fixed pulley 9 and a second fixed pulley 10 for the cable 8 to pass over, and the other end of the cable 8 is fixedly connected to the middle part of the adjusting rod 12. A torsion spring is provided between the adjusting rod 12 and the mounting plate 11 to keep the cable 8 taut. The balancing elastic element 6 is a spring provided between the cover plate 4 and the piston 5.

[0036] Working principle: First, a torsion spring keeps the cable 8 taut. The piston 5 and the balancing elastic element 6 at the end of the adjusting cylinder 3 maintain force balance on both sides of the piston 5 by balancing the force between the air pressure inside the sealed airbag 1 and the balancing elastic element 6. When the ambient temperature rises, the air pressure inside the sealed airbag 1 increases, thereby breaking the previous balance and causing the piston 5 to move. This changes the tension of the cable 8. Under the action of the torsion spring, the adjusting rod 12 rotates until it finds the next equilibrium position. Since the adjusting rod 12 is equipped with a sensor 15, it is equivalent to changing the alarm threshold, thus achieving the purpose of linearly adjusting the dust concentration alarm threshold with temperature changes. Compared with the conventional method of simply setting a fixed threshold, which requires adjustment by experienced personnel, this method greatly improves efficiency and avoids accidents due to negligence. Moreover, compared with the method of adjusting the threshold by detecting the ambient temperature and then using an algorithm, this device is low-cost, simpler in principle, and can most effectively and practically solve existing problems.

[0037] For easy disassembly and installation, the open end 2 is threadedly connected to one end of the adjusting cylinder 3, and the other end of the adjusting cylinder 3 is threadedly connected to a cover plate 4. The balancing elastic element 6 is disposed between the cover plate 4 and the piston 5.

[0038] In order to ensure that the piston 5 moves evenly under force, a hollow or perforated float 7 is provided inside the adjusting cylinder 3. The float 7 is located between the piston 5 and the opening end 2. More preferably, one side of the piston 5 has a concave spherical surface, and the float 7 is adapted to the spherical surface. By utilizing the concave spherical surface, the float 7 can increase the contact area with the piston 5. When the air pressure in the sealing airbag 1 changes, it can push the float 7 to move, thereby driving the piston 5 to move smoothly, thus making the entire device more stable.

[0039] like Figure 2As shown, in order to ensure that the adjusting rod 12 can rotate stably after being subjected to force, a guiding mechanism is also provided between the adjusting rod 12 and the mounting plate 11. Specifically, the guiding mechanism includes an arc guide groove 13 formed on the mounting plate 11 and a guide post 14 fixedly set on the adjusting rod 12 and cooperating with the arc guide groove 13. Of course, the specific structure of the guiding structure is not limited to the above structure. Any mechanism that can guide two rotating parts can be used here.

[0040] In addition, to achieve intelligent alarm, an alarm device is also included, and the sensor 15 is electrically connected to the alarm device. For dust concentration detection, an existing dust concentration detector is used. Since the alarm threshold decreases as temperature rises, when the temperature rises, the rotation direction of the adjusting rod 12 is opposite to the rotation direction of the dust concentration detector's concentration pointer. After the temperature rises, the adjusting rod 12 rotates, adjusting to a relatively low threshold. When the dust concentration detector detects dust concentration, its pointer rotates to the range detected by the sensor 15 on the adjusting rod 12, and the alarm device sounds to alert the staff. The alarm device can be a buzzer or similar.

[0041] Example 2: Figure 4 As shown, the difference from Embodiment 1 is that the sealing airbag 1 is also provided with an inflation / deflation port 16. This inflation / deflation port 16 allows for adjustment of the gas inside the sealing airbag 1, thereby enabling detection based on the different threshold values ​​of different metal dust particles. Currently, the conventional metal dust alarm threshold values ​​are as follows:

[0042] dust Lower limit of explosion Ignition point iron 120g / m3 316℃ magnesium 20g / m3 520℃ Magnesium-aluminum alloy 50g / m3 535℃ Corn and starch 45g / m3 470℃ aluminum powder 45mg / m3 645℃。

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for adjusting common dust detection alarm thresholds, characterized in that: include: A sealed airbag filled with gas, an opening on and connected to the sealed airbag, an adjusting cylinder fixedly disposed on and connected to the opening, and a piston slidably disposed within the adjusting cylinder along its length, wherein a balancing elastic element is disposed between the piston and the end of the adjusting cylinder. It also includes a mounting plate, an adjusting rod rotatably mounted on the mounting plate at one end, and a sensor fixedly mounted on the other end of the adjusting rod for detecting the pointer position of the dust concentration detector, wherein the sensor is connected to an alarm. A follower mechanism is provided between the adjusting rod and the piston. The follower mechanism includes a cable with one end fixedly connected to the piston, a first fixed pulley and a second fixed pulley for the cable to pass over, and the other end of the cable is fixedly connected to the middle part of the adjusting rod. A torsion spring is provided between the adjusting rod and the mounting plate to keep the cable taut. When the temperature rises, the direction of rotation of the adjusting rod is opposite to the direction of rotation of the dust concentration detector's concentration pointer. As the temperature rises, the adjusting rod rotates, thus adjusting to a relatively low threshold. When the dust concentration detector detects the dust concentration, its pointer rotates to the range detected by the sensor on the adjusting rod, and the alarm sounds.

2. The device for adjusting common dust detection alarm thresholds as described in claim 1, characterized in that, The open end is threadedly connected to one end of the adjusting cylinder, and the other end of the adjusting cylinder is threadedly connected to a cover plate. The balancing elastic element is disposed between the cover plate and the piston.

3. The device for adjusting common dust detection alarm thresholds as described in claim 1, characterized in that, The regulating cylinder is equipped with a hollow or perforated float, which is located between the piston and the open end.

4. The device for adjusting common dust detection alarm thresholds as described in claim 3, characterized in that, The piston has a concave spherical surface on one side, and the float is adapted to the spherical surface.

5. The device for adjusting common dust detection alarm thresholds as described in claim 2, characterized in that, The balancing elastic element is a spring disposed between the cover plate and the piston.

6. The device for adjusting common dust detection alarm thresholds as described in claim 1, characterized in that, A guide mechanism is also provided between the adjusting rod and the mounting plate.

7. The device for adjusting common dust detection alarm thresholds as described in claim 6, characterized in that, The guiding mechanism includes an arc-shaped guide groove formed on the mounting plate and a guide post fixedly mounted on the adjusting rod and cooperating with the arc-shaped guide groove.

8. The device for adjusting common dust detection alarm thresholds as described in claim 1, characterized in that, The air-sealed airbag is also provided with an inflation / deflation port.

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