Induction type smoke and toxic gas alarm

Abstract

This utility model relates to the field of alarm technology and discloses an aspirating smoke and toxic gas alarm, including an alarm body. A connecting pipe is threaded to the lower end of the alarm body. An aspirating component is fixedly installed inside the connecting pipe. A fixing pipe is threaded to the lower end of the connecting pipe. An annular groove is formed inside the fixing pipe. A fixing ring is fixedly installed on the side of the fixing pipe near the annular groove. Multiple compression springs are fixedly installed at the lower end of the annular groove. A filter screen is fixedly installed between the upper ends of the multiple compression springs. In this utility model, when the filter screen is blocked, the aspirating component stops operating. The contracted springs rebound and push the connecting ball downwards, causing it to impact the upper end of the filter screen. Simultaneously, the stretched compression springs rebound, ultimately causing the filter screen to vibrate inside the annular groove, shaking off impurities adhering to its surface, thus achieving automatic dust removal.

Description

Technical Field

[0001] This utility model relates to the field of alarm technology, and in particular to an aspirating smoke and toxic gas alarm. Background Technology

[0002] A toxic gas alarm is a safety device used to monitor the concentration of toxic gases such as carbon monoxide, hydrogen sulfide, and ammonia in the environment in real time. When the gas concentration exceeds the safety threshold, it will immediately trigger an audible and visual alarm to help prevent poisoning and explosion accidents. It is widely used in industrial sites with high-risk gas leaks, such as petroleum, chemical, metallurgy, and pharmaceutical industries. It is an important line of defense to protect the lives of workers and ensure safe production in enterprises. Its core component is a gas sensor.

[0003] The existing patent (publication number: CN223743151U) discloses that "this utility model relates to the field of collection device technology, specifically a collection device for a toxic gas alarm, including a welded tube: a collection control mechanism is provided below the welded tube, a barrier protection mechanism is provided below the collection control mechanism, and an air intake adjustment mechanism is provided below the barrier protection mechanism. When this collection device for a toxic gas alarm is in use, the filter plate and the spring assembly are combined through the mechanism assembly. When the filter plate is severely clogged, it will automatically move towards the fan assembly side under the influence of negative pressure. When it moves, it will compress the spring to charge it. Then, when the fan assembly is turned off, the spring rebounds and automatically drives the filter plate to reset. This vibration process can shake off the dust and impurities on the side of the filter plate, so that it can achieve the effect of clearing blockages in a portable manner during operation. The overall structure is ingeniously designed and has good practical effect."

[0004] In the process of developing this application, the inventors discovered the following problems with the prior art:

[0005] The gas alarm relies solely on the spring's restoring force to generate vibration. This vibration has a small amplitude and a single frequency, which is insufficient to shake off the impurities intercepted on the filter plate surface. It lacks sufficient impact force, causing dust to fail to fall off effectively, which will eventually lead to filter clogging.

[0006] Therefore, those skilled in the art have provided inhalation-type smoke and toxic gas alarms to solve the problems mentioned in the background art. Utility Model Content

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose an aspirating smoke and toxic gas alarm. When the filter screen is blocked, the aspirating component stops operating, the contracted spring rebounds and pushes the connecting ball downward, causing it to impact the upper part of the filter screen. At the same time, the stretched compression spring rebounds, ultimately causing the filter screen to vibrate inside the annular groove, causing the impurities attached to its surface to be shaken off, thus realizing automatic dust removal.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A suction-type smoke and toxic gas alarm includes an alarm body, a connecting pipe threaded to the lower end of the alarm body, an air suction component fixedly installed inside the connecting pipe, a fixing pipe threaded to the lower end of the connecting pipe, an annular groove opened inside the fixing pipe, and a fixing ring fixedly installed on the side of the fixing pipe near the annular groove.

[0010] Multiple compression springs are fixedly installed at the lower end of the annular groove, and a filter screen is fixedly installed between the upper ends of the multiple compression springs. Multiple springs are fixedly installed at the upper end of the annular groove, and a connecting ball is fixedly installed at the lower end of each of the multiple springs.

[0011] Furthermore, the outer surfaces of the plurality of springs and the plurality of connecting balls are all disposed between the annular groove and the fixing ring, and the fixing ring and the fixing tube are in a concentric state.

[0012] Furthermore, the filter screen is slidably disposed on the lower end of the annular groove, and the filter screen and the fixed tube are concentric.

[0013] Furthermore, a touch sensor is fixedly installed on one side inside the annular groove, and the lower end of the touch sensor is located on the upper side of the filter screen.

[0014] Furthermore, the lower ends of the multiple connecting balls are all located on the upper side of the filter screen plate near the fixed tube, and the multiple connecting balls are all made of polypropylene.

[0015] Furthermore, the alarm body is externally threaded with a housing, a control module is fixedly installed in the middle of the lower end of the housing, and multiple ventilation mesh holes are opened on the lower end of the housing near the outside. The housing is fitted inside the connecting pipe and the fixing pipe.

[0016] Furthermore, sealing gaskets are provided between the lower end of the alarm body and the upper end of the connecting pipe, and between the upper end of the fixing pipe and the lower end of the connecting pipe.

[0017] This utility model has the following beneficial effects:

[0018] The present invention proposes an aspirating smoke and toxic gas alarm. When a large amount of dust adheres to the surface of the filter screen, the aspirating component will stop operating. At this time, the retracted spring will push the connecting ball to impact the upper part of the filter screen. Simultaneously, the deformed compression spring will pull the filter screen to slide downward inside the annular groove. The impact force of the connecting ball and the rebound force of the compression spring enhance the vibration effect of the filter screen inside the annular groove, thereby more effectively removing impurities from the surface of the filter screen, restoring the permeability of the filter, reducing maintenance costs, and ensuring the stability of equipment operation. Attached Figure Description

[0019] Figure 1 This is an isometric schematic diagram of the entire utility model;

[0020] Figure 2 This is an exploded isometric view of the present invention, close to the filter screen.

[0021] Figure 3 This is a cross-sectional isometric view of the present invention near the air intake component;

[0022] Figure 4 This is an isometric view of the present invention near the fixed ring.

[0023] Legend:

[0024] 1. Alarm body; 2. Connecting pipe; 3. Fixing pipe; 4. Housing; 5. Air intake assembly; 6. Spring; 7. Connecting ball; 8. Annular groove; 9. Fixing ring; 10. Filter screen; 11. Compression spring; 12. Touch sensor; 13. Control module; 14. Ventilation mesh. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-4 One embodiment provided by this utility model:

[0027] A suction-type smoke and toxic gas alarm includes an alarm body 1, a connecting pipe 2 threadedly connected to the lower end of the alarm body 1, an suction component 5 fixedly installed inside the connecting pipe 2, a fixing pipe 3 threadedly connected to the lower end of the connecting pipe 2, an annular groove 8 opened inside the fixing pipe 3, and a fixing ring 9 fixedly installed on the side of the fixing pipe 3 near the annular groove 8.

[0028] Multiple compression springs 11 are fixedly installed at the lower end of the annular groove 8, and a filter screen plate 10 is fixedly installed between the upper ends of the multiple compression springs 11. Multiple springs 6 are fixedly installed at the upper end of the annular groove 8, and a connecting ball 7 is fixedly installed at the lower end of each of the multiple springs 6.

[0029] Multiple springs 6 and multiple connecting balls 7 are all set between the annular groove 8 and the fixed ring 9. The fixed ring 9 and the fixed tube 3 are in a concentric state. The filter screen plate 10 is slidably set inside the lower end of the annular groove 8. The filter screen plate 10 and the fixed tube 3 are in a concentric state.

[0030] A touch sensor 12 is fixedly installed on one side inside the annular groove 8. The lower end of the touch sensor 12 is located on one side of the upper end of the filter screen plate 10. The lower ends of multiple connecting balls 7 are all located on the side of the upper end of the filter screen plate 10 near the fixed tube 3. All multiple connecting balls 7 are made of polypropylene.

[0031] The alarm body 1 is externally threaded to a housing 4. A control module 13 is fixedly installed in the middle of the lower end of the housing 4. Multiple ventilation mesh holes 14 are opened on the lower end of the housing 4 near the outside. The housing 4 is internally fitted to the outside of the connecting pipe 2 and the fixed pipe 3. Sealing gaskets are provided between the lower end of the alarm body 1 and the upper end of the connecting pipe 2, and between the upper end of the fixed pipe 3 and the lower end of the connecting pipe 2.

[0032] Specifically, before testing, first connect the lower end of the alarm body 1 to the connecting pipe 2 with a thread. Then, connect the connecting pipe 2 to the fixing pipe 3 with a thread. Next, connect the outer shell 4 to the outside of the alarm body 1 with a thread, so that the connecting pipe 2 and the fixing pipe 3 are both inside the outer shell 4. Then, fix the alarm body 1, which has been connected, in a suitable position with bolts and connect it to an external power source.

[0033] When in use, the air intake component 5 inside the connecting pipe 2 is activated. The air intake component 5 consists of a cross-shaped fixing plate and an air intake fan, allowing outside air to enter the fixed pipe 3 through multiple ventilation mesh holes 14 at the lower end of the outer casing 4. Subsequently, when the outside air flows through the filter plate 10 inside the fixed pipe 3, the filter plate 10 intercepts impurities in the air to prevent impurities from entering the alarm body 1.

[0034] Furthermore, when the suction fan is running, it generates an upward airflow. The airflow drives the connecting ball 7 made of polypropylene to move upward along the gap between the fixed ring 9 and the annular groove 8, and squeezes the corresponding spring 6, so that the spring 6 is in a contracted state. The gap between the fixed ring 9 and the annular groove 8 not only serves as a guide, but also facilitates the air to push the connecting ball 7 upward. Subsequently, the alarm body 1 will detect the smoke and toxic gases that enter it. After the detection is completed, the gas will be discharged from the exhaust hole at the top of the alarm body 1.

[0035] When the smoke and toxic gas reach the set value, the alarm body 1 will send a signal, causing the control module 13 to sound an alarm. The transmission and detection principles of the alarm body 1 and the control module 13 are both mature and publicly available technologies. Their functions, specific components and principles are clear to those skilled in the art, so they will not be described in detail here.

[0036] As the filter screen 10 is used continuously, its lower end will gradually be blocked by impurities. As outside air continues to enter, the filter screen 10 will move upward along the inside of the annular groove 8 under the action of airflow pressure. The upward movement of the filter screen 10 will also pull the compression spring 11 connected to it, causing the compression spring 11 to deform.

[0037] When the upper end of the filter plate 10 touches the touch sensor 12, the touch sensor 12 sends a signal, the suction fan stops running, the airflow disappears, the compressed spring 6 rebounds, pushing the connecting ball 7 downward. The connecting ball 7 will hit the upper end of the filter plate 10. At the same time, the compression spring 11 at the lower end of the annular groove 8 rebounds, causing the filter plate 10 to vibrate up and down inside the annular groove 8, thereby shaking off the impurities intercepted on the surface of the filter plate 10. The impurities will be discharged through the vent mesh 14 at the lower end of the outer shell 4, realizing the automatic dust removal of the filter plate 10. The vent mesh 14 at the lower end of the outer shell 4 can only block the entry of larger foreign objects and only allow gas and fine dust to pass through. It has no filtering function. When the filter plate 10 is at the bottom of the annular groove 8, it still has a certain distance from the control module 13.

[0038] When the suction fan stops running for a set time, it will start running again. The sealing gaskets between the alarm body 1 and the connecting pipe 2, the connecting pipe 2 and the fixed pipe 3, and the fixed pipe 3 and the outer shell 4 are made of silicone rubber, which has good elasticity, sealing performance and aging resistance. It can ensure the air passage tightness of each threaded connection and prevent air leakage, effectively improving the suction sampling efficiency and detection accuracy. At the same time, it ensures the suction efficiency of the suction component 5 and avoids unfiltered air from entering the device directly and affecting the detection effect. The whole uses a threaded connection method, which is simple and reliable in structure, easy to assemble and disassemble, and easy to maintain.

[0039] It should be noted that both spring 6 and compression spring 11 are made of stainless steel, which has good fatigue strength and can effectively prevent the elasticity from failing due to excessive compression and excessive stretching. At the same time, it can prevent rust from affecting the elasticity. Subsequent operators can replace them with professional tools.

[0040] The fixing ring 9 and the inner wall of the annular groove 8 form a vertical guide gap, which limits the connecting ball 7 to only move up and down in the vertical direction, avoids deviation, and ensures that the impact is aligned with the upper surface of the filter screen plate 10.

[0041] When the touch sensor 12 is triggered, it outputs an electrical signal. The control circuit inside the alarm body 1 receives the signal and cuts off the power supply to the suction component 5, causing it to stop operating. The internal circuit of the alarm body 1 has a built-in delay module with a set delay value. After the dust cleaning is completed, the power supply is automatically restored, and the suction component 5 restarts. This control principle is a mature and publicly available technology. Its function, specific composition and principle are clear to those skilled in the art. Therefore, it will not be described in detail.

[0042] All standard parts used in this application can be purchased from the market. Irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt mature existing technologies such as bolts, rivets, welding and other conventional methods. Mechanical parts, components and equipment adopt conventional models in existing technologies. Circuit connections adopt conventional connection methods in existing technologies. Therefore, they will not be described in detail. The contents not described in detail in this specification are all existing technologies known to those skilled in the art. Their functions, specific components and principles are clear to those skilled in the art. Therefore, they will not be described in detail. The model parameters of each electrical appliance are not specifically limited. Conventional equipment can be used.

[0043] Working principle: When in use, the air intake component 5 inside the connecting pipe 2 operates, thereby drawing outside air into the fixed pipe 3 through the air vent 14 at the lower end of the outer shell 4. The filter plate 10 inside the fixed pipe 3 will intercept impurities in the air. At the same time, the upward airflow generated by the operation of the air intake fan will exert a force on the connecting ball 7, causing the polypropylene connecting ball 7 to move upward along the gap between the fixed ring 9 and the annular groove 8, and compress the spring 6, so that the spring 6 is in a contracted state. Air enters the alarm body 1, and the sensor inside the alarm body will monitor the smoke concentration and toxic gas content in real time.

[0044] As the equipment runs for a long time, impurities will gradually accumulate on the lower surface of the filter screen 10 and blockage will gradually occur. As outside air is continuously drawn in, the pressure difference of the airflow through the blockage increases, which in turn pushes the filter screen 10 to slide upward along the inner wall of the annular groove 8. At the same time, the compression spring 11 is pulled, causing it to undergo elastic deformation. When the filter screen 10 moves to its limit position and contacts the touch sensor 12, the suction fan stops running, and the upward airflow suction disappears instantly. At this time, the compressed spring 6 rebounds and pushes the connecting ball 7 to move downward and hit the upper surface of the filter screen 10. At the same time, the stretched compression spring 11 rebounds, causing the filter screen 10 to vibrate inside the annular groove 8, thereby effectively shaking off the impurities attached to the surface of the filter screen 10, thus realizing the automatic dust removal operation of the filter screen 10.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An aspirating smoke and toxic gas alarm, comprising an alarm body (1), characterized in that: The lower end of the alarm body (1) is threaded with a connecting pipe (2), and an air intake component (5) is fixedly installed inside the connecting pipe (2). The lower end of the connecting pipe (2) is threaded with a fixing pipe (3), and an annular groove (8) is opened inside the fixing pipe (3). A fixing ring (9) is fixedly installed on the side of the fixing pipe (3) near the annular groove (8). Multiple compression springs (11) are fixedly installed at the lower end of the annular groove (8), and a filter screen plate (10) is fixedly installed between the upper ends of the multiple compression springs (11). Multiple springs (6) are fixedly installed at the upper end of the annular groove (8), and a connecting ball (7) is fixedly installed at the lower end of each of the multiple springs (6).

2. The aspirating smoke and toxic gas alarm according to claim 1, characterized in that: The external parts of the multiple springs (6) and the multiple connecting balls (7) are all disposed between the annular groove (8) and the fixing ring (9), and the fixing ring (9) and the fixing tube (3) are in a concentric state.

3. The aspirating smoke and toxic gas alarm according to claim 1, characterized in that: The filter screen (10) is slidably disposed on the outside of the lower end of the annular groove (8), and the filter screen (10) and the fixed tube (3) are in a concentric state.

4. The aspirating smoke and toxic gas alarm according to claim 1, characterized in that: A touch sensor (12) is fixedly installed on one side inside the annular groove (8), and the lower end of the touch sensor (12) is located on one side of the upper end of the filter screen (10).

5. The aspirating smoke and toxic gas alarm according to claim 1, characterized in that: The lower ends of the multiple connecting balls (7) are all located on the side of the upper end of the filter screen plate (10) near the fixed tube (3), and the multiple connecting balls (7) are all made of polypropylene.

6. The aspirating smoke and toxic gas alarm according to claim 1, characterized in that: The alarm body (1) is externally threaded with a shell (4). A control module (13) is fixedly installed in the middle of the lower end of the shell (4). Multiple ventilation mesh holes (14) are opened on the lower end of the shell (4) near the outside. The shell (4) is internally fitted outside the connecting pipe (2) and the fixing pipe (3).

7. The aspirating smoke and toxic gas alarm according to claim 1, characterized in that: A sealing gasket is provided between the lower end of the alarm body (1) and the upper end of the connecting pipe (2), and between the upper end of the fixing pipe (3) and the lower end of the connecting pipe (2).

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