A composite fire extinguishing agent concentration detector and method thereof

Abstract

The present application relates to the technical field of fire fighting, and particularly relates to a composite fire extinguishing agent concentration detector and a method thereof, which comprises a detection mechanism, a detection box being installed on a fire extinguishing agent storage tank, an exhaust groove being formed in the top of the detection box, an air extractor being fixedly connected to the bottom of the inside of the detection box, a supporting rod being fixedly connected to the top of the air extractor, and a detector for detecting the concentration of fire extinguishing agent being fixedly connected to the top of the supporting rod; an automatic closing mechanism, a sealing plate being used for sealing the exhaust groove, the diameter of the sealing plate being the same as the diameter of the inner wall of the exhaust groove, an air bag ring being sleeved on the surface of the sealing plate, an air inlet groove being formed in the bottom of the air bag ring, and a limiting assembly being fixedly connected to the top of the detection box, the detection mechanism being started for detection, the automatic closing mechanism being started for intermittent sealing, and a cleaning mechanism being started for cleaning the oxides at the detection end.

Description

Technical Field

[0001] This invention relates to the technical field of fire protection, and in particular to a composite fire extinguishing agent concentration detector and method thereof. Background Technology

[0002] Gaseous fire extinguishing agents are fire extinguishing agents that extinguish fires in a gaseous state. They are usually stored in storage tanks. During long-term storage, detection devices are needed to check the tanks containing the fire extinguishing agents to confirm whether there is any leakage. The detection device uses an exhaust fan to draw air from around the tank and blow it through the detection end of the device, thereby detecting the leakage of fire extinguishing agents and the concentration of the leaked fire extinguishing agents.

[0003] However, during the testing process using the fire extinguishing agent concentration detection device, the airflow will quickly blow across the detection end of the device, causing the airflow to quickly carry the fire extinguishing agent away from the detection area, thus affecting the detection accuracy of the device. At the same time, when used in some humid environments or coastal facilities, the device's detection end will be affected by moisture or salt spray, accelerating corrosion and causing a brittle oxide layer to appear on the surface of the detection end, thus isolating the detection end from the airflow. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the current composite fire extinguishing agent concentration detectors, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a composite fire extinguishing agent concentration detector, the purpose of which is to: continuously open and close the exhaust port for stable detection and clean the detection end.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a detection mechanism comprising a detection box that can be installed on a fire extinguishing agent storage tank, the top of the detection box having an exhaust vent, an exhaust fan fixedly connected to the bottom of the inside of the detection box, a support rod fixedly connected to the top of the exhaust fan, and a detector for detecting the concentration of the fire extinguishing agent fixedly connected to the top of the support rod; and an automatic closing mechanism comprising a sealing plate for sealing the exhaust vent, the diameter of the sealing plate being the same as the diameter of the inner wall of the exhaust vent, an airbag ring sleeved on the surface of the sealing plate, and an air inlet groove opened at the bottom of the airbag ring. A limiting component is fixedly connected to the top of the box, and an opening component is fixedly connected to the top of the inner wall of the detection box; and a cleaning mechanism, which includes a brush ring for cleaning the detection end of the detector, the brush ring being movably sleeved on the surface of the support rod, a transmission ring being movably sleeved on the surface of the brush ring, a lifting rod being fixedly connected to the surface of the transmission ring, three lifting rods being arranged in a ring and evenly distributed, the top of the lifting rod being fixedly connected to the bottom of the sealing plate, a force-bearing fan blade being fixedly connected to the bottom of the brush ring, a guide component being sleeved on the bottom of the detector surface, and a movable component being sleeved on the surface of the brush ring.

[0008] In a preferred embodiment of the composite fire extinguishing agent concentration detector of the present invention, the limiting component includes a limiting plate, the limiting plate is L-shaped, four limiting plates are provided and are distributed in a ring at equal intervals, the bottom of the limiting plate is fixedly connected to the top of the detection box, the top of the sealing plate is fixedly connected to a limiting rod, the surface of the limiting rod is movably fitted with a limiting frame, and the surface of the limiting frame is fixedly connected to the top of the inner side of the limiting plate.

[0009] In a preferred embodiment of the composite fire extinguishing agent concentration detector of the present invention, the opening component includes a transmission magnetic plate, six of which are arranged in a ring at equal intervals. A pulling magnetic plate is provided on the inner side of the transmission magnetic plate, and the outer side of the pulling magnetic plate is attracted to the inner side of the transmission magnetic plate by opposite polarities. The top of the pulling magnetic plate is fixedly connected to the outer side of the bottom of the airbag ring. A lower stabilizing magnetic plate is embedded in the top of the airbag ring, six of which are arranged in a ring at equal intervals. An upper stabilizing magnetic plate is magnetically adsorbed on the top of the lower stabilizing magnetic plate, and the upper stabilizing magnetic plate is embedded in the top of the inner wall of the detection box.

[0010] As a preferred embodiment of the composite fire extinguishing agent concentration detector of the present invention, the guiding component includes a conical guide sleeve, the sealing plate is conical, the surface of the sealing plate is provided with a guide groove, a plurality of guide grooves are provided and are distributed in a ring at equal intervals, and the top of the inner wall of the plurality of guide grooves is inclined to the same side.

[0011] In a preferred embodiment of the composite fire extinguishing agent concentration detector of the present invention, the movable component includes a slip ring, and the inner wall of the transmission ring is provided with a movable groove, the inner wall of the movable groove being slidably connected to the surface of the slip ring.

[0012] In a preferred embodiment of the composite fire extinguishing agent concentration detector of the present invention, a limiting plate is fixedly connected to the top of the limiting rod, and the diameter of the limiting plate is larger than the diameter of the inner wall of the limiting frame.

[0013] In a preferred embodiment of the composite fire extinguishing agent concentration detector of the present invention, the inner wall of the limiting frame is inlaid with ball bearings, and a plurality of ball bearings are inlaid and distributed in a ring at equal intervals. The limiting frame is slidably connected to the limiting rod through the ball bearings.

[0014] In a preferred embodiment of the composite fire extinguishing agent concentration detector of the present invention, a first limiting strip is fixedly connected to both the front and rear sides of the airbag, a second limiting strip for limiting the rotation of the airbag ring is movably connected to one side of the limiting strip, and the outer side of the second limiting strip is fixedly connected to the inner wall of the detection box.

[0015] The beneficial effects of this invention are: starting the detection mechanism to perform detection, starting the automatic closing mechanism to perform intermittent sealing, and starting the cleaning mechanism to clean the oxides at the detection end.

[0016] In view of the problems existing in the current composite fire extinguishing agent concentration detectors, the present invention is proposed.

[0017] Therefore, the purpose of this invention is to provide a detection method for a composite fire extinguishing agent concentration detector, the purpose of which is to: intermittently switch the exhaust port to ensure stable detection, rotate the air, and clean the oxides on the surface of the detection end.

[0018] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including,

[0019] Initiate testing by a testing agency;

[0020] The automatic closing mechanism is activated to intermittently close the enclosure;

[0021] The cleaning mechanism is activated to remove the oxides from the detection end.

[0022] As a preferred embodiment of the detection method of the composite fire extinguishing agent concentration detector of the present invention, it further includes:

[0023] The testing agency was activated to draw in and test the air around the fire extinguishing agent storage tank.

[0024] During the testing process, an automatic closing mechanism is activated to intermittently close and open the exhaust port, ensuring the accuracy of the test.

[0025] During the automatic closing mechanism's closing and opening process, the cleaning mechanism is simultaneously driven to brush off and fling out the oxides on the surface of the detection end.

[0026] The beneficial effects of this invention are as follows: The detection mechanism draws in the air around the fire extinguishing agent storage tank for detection. During the detection process, the automatic closing mechanism is activated to intermittently close and open the exhaust port to ensure the accuracy of the detection. During the closing and opening process of the automatic closing mechanism, the cleaning mechanism is simultaneously driven to brush off and throw out the oxides on the surface of the detection end. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 This is a cross-sectional structural diagram of the detection box provided by the present invention.

[0030] Figure 3 A three-dimensional structural diagram of the sealing plate provided by the present invention.

[0031] Figure 4 This is a cross-sectional structural diagram of the transmission ring provided by the present invention.

[0032] Figure 5 This is a cross-sectional structural diagram of the limiting frame provided by the present invention. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth. Example 1

[0037] Reference Figure 1 - Figure 5 This is the first embodiment of the present invention, which provides a detection method for a composite fire extinguishing agent concentration detector, enabling intermittent closed detection and cleaning of oxides.

[0038] The testing unit 100 is activated to draw in the air around the fire extinguishing agent storage tank and blow it toward the testing end for testing;

[0039] During the testing process, the automatic closing mechanism 200 is activated to intermittently close and open the exhaust port, so that the air drawn into the testing mechanism 100 is accumulated for a period of time and tested. Then the air is discharged and replaced to ensure the accuracy of the test.

[0040] During the closing and opening process of the automatic closing mechanism 200, the cleaning mechanism 300 is driven simultaneously to brush off and throw off the oxides on the surface of the detection end, preventing oxide blockage between the detection end and the air component and ensuring full contact between the detection end and the air. Example 2

[0041] Reference Figure 1 - Figure 5 In the second embodiment of the present invention, a detection mechanism 100 and an automatic closing mechanism 200 are provided to realize the intermittent switching of the exhaust port for detecting the concentration of the fire extinguishing agent.

[0042] The detection mechanism 100 includes a detection box 101 that can be installed on a fire extinguishing agent storage tank. The top of the detection box 101 has an exhaust vent 102. An exhaust fan 103 is fixedly connected to the bottom of the detection box 101. A support rod 104 is fixedly connected to the top of the exhaust fan 103. A detector 105 for detecting the concentration of the fire extinguishing agent is fixedly connected to the top of the support rod 104. An automatic closing mechanism 200 includes a sealing plate 201 for sealing the exhaust vent 102. The diameter of the sealing plate 201 is the same as the diameter of the inner wall of the exhaust vent 102. The surface of the sealing plate 201... The faceplate is equipped with an airbag ring 202, and an air inlet groove 203 is opened at the bottom of the airbag ring 202. A limit assembly 204 is fixedly connected to the top of the detection box 101, and an opening assembly 205 is fixedly connected to the top of the inner wall of the detection box 101. The limit assembly 204 includes a limit plate 204a, which is L-shaped and has four plates arranged in a ring at equal intervals. The bottom of the limit plate 204a is fixedly connected to the top of the detection box 101. A limit rod 204b is fixedly connected to the top of the sealing plate 201, and the surface of the limit rod 204b is movable. A limiting frame 204c is fitted, and the surface of the limiting frame 204c is fixedly connected to the top of the inner side of the limiting plate 204a. The opening component 205 includes a transmission magnetic plate 205a, of which six are arranged in a ring at equal intervals. A tension magnetic plate 205b is provided on the inner side of the transmission magnetic plate 205a. The outer side of the tension magnetic plate 205b is attracted to the inner side of the transmission magnetic plate 205a by opposite forces. The top of the tension magnetic plate 205b is fixedly connected to the outer side of the bottom of the airbag ring 202. A lower stabilizing magnetic plate 205c is embedded in the top of the airbag ring 202. Six stabilizing magnetic plates 205c are arranged in a ring at equal intervals. The top of the lower stabilizing magnetic plate 205c is magnetically attracted to the upper stabilizing magnetic plate 205d, which is embedded in the top of the inner wall of the detection box 101. The top of the limiting rod 204b is fixedly connected to the limiting disk 204d, the diameter of which is larger than the diameter of the inner wall of the limiting frame 204c. The inner wall of the limiting frame 204c is inlaid with several balls 204e, which are arranged in a ring at equal intervals. The limiting frame 204c is slidably connected to the limiting rod 204b through the balls 204e.

[0043] Specifically, the exhaust fan 103 is activated to draw air from the surface of the extinguishing agent storage tank into the detection box 101. The detection end of the detector 105, supported by the support rod 104, comes into contact with the air, thereby detecting the content of extinguishing agent in the air. At the same time, the sealing plate 201 is used to intermittently switch and circulate, allowing the gas to stay longer and ensuring the accuracy of the detection end of the detector 105 in detecting the air.

[0044] Furthermore, before testing, the testing box 101 can be installed on the extinguishing agent storage tank. Then, the exhaust fan 103 is turned on to draw air from the surface of the extinguishing agent storage tank into the testing box 101. The detection end of the detector 105, supported by the support rod 104, comes into contact with the air, thereby detecting the extinguishing agent content in the air. During the continuous exhaust process of the exhaust fan 103, air is continuously blown into the testing box 101. At this time, the sealing plate 201 can seal the exhaust channel 102, so that the air is retained in the testing box 101. At the same time, the magnetic force of the transmission magnetic plate 205a drives the pulling magnetic plate 205b to pull outward, so that the air inlet channel 203 is pulled open, allowing the exhaust fan 103 to continuously blow air to the top. During air blowing, some gas is blown into the interior of the airbag ring 202, causing it to expand and seal the gap between the exhaust groove 102 and the sealing plate 201. Simultaneously, the magnetic attraction between the lower stabilizing magnetic plate 205c and the upper stabilizing magnetic plate 205d ensures the stability of the top of the airbag ring 202, making it fit more closely to the top of the inner wall of the detection chamber 101. During continuous air extraction, the air pressure inside the detection chamber 101 continuously increases until it exceeds the weight of the airbag ring 202, sealing plate 201, limiting rod 204b, limiting disc 204d, pulling magnetic plate 205b, and lower stabilizing magnetic plate 205c. At this point, the sealing plate 201 will be affected by the air pressure. The sound causes the airbag ring 202 to disengage from the exhaust groove 102. At this time, the airbag ring 202 will be compressed and deformed within the exhaust groove 102, thus squeezing out the internal air from the exhaust groove 102. This continues until the sealing plate 201 drives the limiting rod 204b to move upward along the inner wall of the limiting frame 204c. The maximum upward movement is limited by the L-shaped limiting plate 204a, and the ball bearing 204e reduces the friction between the limiting rod 204b and the limiting frame 204c. Simultaneously, the air originally stored in the detection box 101 will be discharged through the exhaust groove 102 under the power of air pressure and the exhaust fan 103. This continues until the air pressure inside the detection box 101 can no longer support the sealing plate 201, at which point the sealing plate 201 will... The airbag ring 202 will fall downwards into the detection box 101, and the maximum downward movement space of the sealing plate 201 will be limited by the limiting plate 204d. Then, the magnetic force of the transmission magnetic plate 205a will drive the pulling magnetic plate 205b to pull outwards, so that the air inlet slot 203 will be pulled open. At this time, the exhaust fan 103 will continuously inject the gas on the surface of the fire extinguishing agent storage tank into the detection box 101, and then the airbag ring 202 will continue to expand. At the same time, the lower stabilizing magnetic plate 205c will be attracted to the upper stabilizing magnetic plate 205d, so that the top of the airbag ring 202 will be more stable, and the air in the detection box 101 will be replaced with new air to be tested, thus performing intermittent sealing and ventilation in this cycle. Example 3

[0045] Reference Figure 1 - Figure 5 In the third embodiment of the present invention, a cleaning mechanism 300 is provided to remove and discharge the oxides on the surface of the detection end.

[0046] The cleaning mechanism 300 includes a brush ring 301 for cleaning the detection end of the detector 105. The brush ring 301 is movably sleeved on the surface of the support rod 104. A transmission ring 302 is movably sleeved on the surface of the brush ring 301. A lifting rod 303 is fixedly connected to the surface of the transmission ring 302. Three lifting rods 303 are arranged in a ring and are evenly distributed. The top of the lifting rod 303 is fixedly connected to the bottom of the sealing plate 201. A force-bearing fan blade 304 is fixedly connected to the bottom of the brush ring 301. A guide assembly 305 is sleeved on the bottom of the surface of the detector 105. A movable assembly 306 is sleeved on the surface of the brush ring 301. The guide assembly 305 includes a conical guide sleeve 305a. The plate 201 is conical in shape. The surface of the sealing plate 201 is provided with guide grooves 305b. Several guide grooves 305b are provided and are distributed in a ring at equal intervals. The top of the inner wall of the several guide grooves 305b is inclined to the same side. The movable component 306 includes a slip ring 306a. The inner wall of the transmission ring 302 is provided with a movable groove 306b. The inner wall of the movable groove 306b is slidably connected to the surface of the slip ring 306a. The front and rear sides of the airbag are fixedly connected with a first limiting strip 305c. A second limiting strip 305d for limiting the rotation of the airbag ring 202 is movably connected to one side of the limiting strip. The outer side of the second limiting strip 305d is fixedly connected to the inner wall of the detection box 101.

[0047] Specifically, during the process of the sealing plate 201 moving upward to exchange air, the brush ring 301 rotates and moves to the detection end surface of the detector 105. This allows the brush ring 301 to brush away the oxides present on the detection end surface of the detector 105 during the air exchange process, preventing oxide blockage between the detection end and the air and ensuring full contact between the detection end and the air. At the same time, since the brush ring 301 is in an air exchange state when cleaning the detection end surface of the detector 105, it will not affect the detection of the detector 105.

[0048] Furthermore, during the upward movement of the sealing plate 201 for ventilation, the lifting rod 303 pulls the transmission ring 302 and the brush ring 301 upward. The brush ring 301 then moves to the detection end surface of the detector 105, brushing away oxides present on the detection end surface during ventilation. Simultaneously, the airflow from the exhaust fan 103 blowing air onto the top blows towards the force-bearing fan blades 304, causing them to rotate. This rotation of the fan blades 304 and the brush ring 301 further drives the detector 105 upward. The removal of oxides from the surface of the detector 105 by the brush ring 301 improves the cleaning effect. Furthermore, since the brush ring 301 is in a ventilated state during the cleaning of the detector 105's surface, it does not affect the detector's detection. During the rotation of the brush ring 301, the slip ring 306a rotates along the inner wall of the movable groove 306b, ensuring the stability of the brush ring 301. The removed oxide fragments are influenced by the upward blowing force of the exhaust fan 103 and move upward along the conical guide sleeve 305a, then are blown towards the sealing plate 201. The sealing plate 201 then forms a conical shape... The design and guide groove 305b ensure that even after oxide fragments are blown towards the bottom of the sealing plate 201, they move outward along the guide groove 305b and detach from the sealing plate 201 for discharge. Simultaneously, the top of the inner wall of the guide groove 305b is inclined to the same side, allowing the sealing plate 201 to also rotate under wind force. The rotating sealing plate 201 helps to eject oxide fragments from the guide groove 305b. Furthermore, the rotation of the sealing plate 201 also drives the transmission ring 302 to rotate, which in turn drives the internally connected brush. Ring 301 has a certain speed-increasing effect, thereby improving the cleaning effect of brush ring 301. After the sealing plate 201 is lowered and reset, it will still rotate until the sealing plate 201 is driven by the airbag ring 202 to contact the first limit strip 305c and the second limit strip 305d and rotate to limit the rotation. Then the sealing plate 201 in the sealed state can be rotated to limit the rotation, so as to avoid affecting the sealing performance. At the same time, under the condition of being rotated to limit the rotation, the pulling magnetic plate 205b and the lower stabilizing magnetic plate 205c can correspond to the corresponding transmission magnetic plate 205a and the upper stabilizing magnetic plate 205d.

[0049] It should be noted that both the sealing plate 201 and the load-bearing fan blade 304 are made of lightweight plastic to avoid excessive weight affecting the movement of the sealing plate 201 and the load-bearing fan blade 304.

[0050] The remaining structure is the same as that in Example 2. Example 4

[0051] Reference Figure 1 - Figure 5This is the fourth embodiment of the present invention, which differs from the third embodiment in that: this embodiment provides a composite fire extinguishing agent concentration detector and its method.

[0052] Before testing, the testing box 101 can be installed on the fire extinguishing agent storage tank. Then, the exhaust fan 103 is turned on to draw the air from the surface of the fire extinguishing agent storage tank into the testing box 101. The detection end of the detector 105, which is supported by the support rod 104, comes into contact with the air, thereby detecting the content of fire extinguishing agent in the air.

[0053] During the continuous exhaust process of the exhaust fan 103, air is continuously blown into the detection box 101. At this time, the sealing plate 201 can seal the exhaust slot 102, so that the air is retained inside the detection box 101. At the same time, the magnetic force of the transmission magnetic plate 205a drives the pulling magnetic plate 205b to pull outward, which opens the air inlet slot 203. As the exhaust fan 103 continuously blows air to the top, some of the air is blown into the airbag ring 202, causing the airbag ring 202 to expand, thereby sealing the gap between the exhaust slot 102 and the sealing plate 201. Meanwhile, the lower stabilizing magnetic plate 205c and the upper stabilizing magnetic plate 205c... The magnetic adsorption of the magnetic plate 205d ensures the stability of the top of the airbag ring 202, making the airbag ring 202 fit more closely to the top of the inner wall of the detection chamber 101. During continuous ventilation, the air pressure inside the detection chamber 101 continuously increases until it exceeds the weight of the airbag ring 202, sealing plate 201, limiting rod 204b, limiting plate 204d, pulling magnetic plate 205b, and lower stabilizing magnetic plate 205c. At this point, the sealing plate 201 will cause the airbag ring 202 to detach from the exhaust groove 102 under the influence of air pressure. At this time, the airbag ring 202 will be squeezed and deformed inside the exhaust groove 102, thus filling the internal cavity. Air is forced out from the exhaust groove 102 until the sealing plate 201 drives the limiting rod 204b to move upward along the inner wall of the limiting frame 204c. The maximum upward movement is limited by the L-shaped limiting plate 204a. The ball bearing 204e reduces the friction between the limiting rod 204b and the limiting frame 204c. Simultaneously, the air originally stored in the detection box 101 is discharged through the exhaust groove 102 under the pressure of the air and the power of the exhaust fan 103. This continues until the air pressure inside the detection box 101 can no longer support the sealing plate 201. At this point, the sealing plate 201 drives the airbag ring 202 to fall downward into the detection box 101 and pass through the limiting plate. The disk 204d limits the maximum downward movement of the sealing plate 201. Then, the magnetic force of the transmission magnetic plate 205a drives the pulling magnetic plate 205b to pull outward, causing the air inlet slot 203 to be opened. At this time, the exhaust fan 103 continuously injects the gas on the surface of the extinguishing agent storage tank into the detection box 101. Then, the airbag ring 202 will continue to expand. At the same time, the lower stabilizing magnetic plate 205c will be attracted to the upper stabilizing magnetic plate 205d, making the top of the airbag ring 202 more stable. The air in the detection box 101 has been replaced with new air to be tested, thus performing intermittent sealing and ventilation in this cycle.

[0054] During the process of ventilation by the upward movement of the sealing plate 201, the lifting rod 303 pulls the transmission ring 302 and the brush ring 301 upward. The brush ring 301 then moves to the detection end surface of the detector 105, allowing it to brush away oxides on the detection end surface during ventilation. Simultaneously, the airflow from the exhaust fan 103 blowing air onto the top also blows onto the force-bearing fan blades 304, causing them to rotate. This causes the force-bearing fan blades 304 to rotate and raise the brush ring 301, thus detecting the detector 105. The removal of oxides from the end surface improves the cleaning effect. Furthermore, since the brush ring 301 is in a ventilated state during the cleaning of the detection end surface of the detector 105, it does not affect the detection of the detector 105. During the rotation of the brush ring 301, the slip ring 306a rotates along the inner wall of the movable groove 306b, ensuring the stability of the brush ring 301. The removed oxide fragments are affected by the upward blowing force of the exhaust fan 103 and move upward along the conical guide sleeve 305a, then are blown towards the sealing plate 201. The sealing plate 201 is then used for its conical design... The guide groove 305b is positioned so that even if oxide fragments are blown towards the bottom of the sealing plate 201, they move outward along the guide groove 305b and detach from the sealing plate 201 for discharge. Simultaneously, the top of the inner wall of the guide groove 305b is inclined to the same side, allowing the sealing plate 201 to also rotate under wind force. The rotating sealing plate 201 helps to fling out oxide fragments from the guide groove 305b. The rotation of the sealing plate 201 also drives the transmission ring 302 to rotate, allowing the internally movable brush ring to rotate. 301 has a certain speed-up effect, thereby improving the cleaning effect of the brush ring 301. After the sealing plate 201 descends and resets, it will still rotate until the sealing plate 201 drives the first limit strip 305c to contact the second limit strip 305d through the airbag ring 202 and rotates and limits it. Then, the sealing plate 201 in the sealed state can be rotated and limited to avoid affecting the sealing performance. At the same time, under the condition of being rotated and limited, the pulling magnetic plate 205b and the lower stabilizing magnetic plate 205c can correspond with the corresponding transmission magnetic plate 205a and the upper stabilizing magnetic plate 205d.

[0055] In summary, the detection mechanism 100 is activated to perform air extraction detection, followed by the activation of the automatic closing mechanism 200 for intermittent sealing, ensuring that the air drawn into the detection mechanism 100 is stored for a period of time and tested. Then, the air is discharged and replaced, and the cleaning mechanism 300 is activated to clean and remove the oxides at the detection end.

Claims

1. A composite fire extinguishing agent concentration detector, characterized in that: include, The testing mechanism (100) includes a testing box (101) installed on the fire extinguishing agent storage tank. The top of the testing box (101) is provided with an exhaust duct (102). An exhaust fan (103) is fixedly connected to the bottom of the testing box (101). A support rod (104) is fixedly connected to the top of the exhaust fan (103). A detector (105) for detecting the concentration of the fire extinguishing agent is fixedly connected to the top of the support rod (104). An automatic closing mechanism (200) includes a sealing plate (201) for sealing the exhaust groove (102), the diameter of the sealing plate (201) being the same as the diameter of the inner wall of the exhaust groove (102), an airbag ring (202) being fitted onto the surface of the sealing plate (201), an air inlet groove (203) being provided at the bottom of the airbag ring (202), and an opening assembly (205) being fixedly connected to the top of the inner wall of the detection box (101). A limiting assembly (204) is fixedly connected to the top of the sealing plate (201). The limiting assembly (204) includes a limiting plate (204a), which is L-shaped. Four limiting plates (204a) are arranged in a ring and are evenly distributed. The bottom of the limiting plate (204a) is fixedly connected to the top of the detection box (101). A limiting rod (204b) is fixedly connected to the top of the sealing plate (201). The surface of the limiting rod (204b) is movable. A limiting frame (204c) is provided, the surface of which is fixedly connected to the top of the inner side of the limiting plate (204a). The opening assembly (205) includes a transmission magnetic plate (205a), six of which are arranged in a ring at equal intervals. A tension magnetic plate (205b) is provided on the inner side of the transmission magnetic plate (205a), and the outer side of the tension magnetic plate (205b) is opposite to the inner side of the transmission magnetic plate (205a). Attracted, the top of the pulling magnetic plate (205b) is fixedly connected to the outer side of the bottom of the airbag ring (202). A lower stabilizing magnetic plate (205c) is embedded in the top of the airbag ring (202). Six lower stabilizing magnetic plates (205c) are arranged in a ring and are evenly distributed. An upper stabilizing magnetic plate (205d) is magnetically attracted to the top of the lower stabilizing magnetic plate (205c). The upper stabilizing magnetic plate (205d) is embedded in the top of the inner wall of the detection box (101); and, The cleaning mechanism (300) includes a brush ring (301) for cleaning the detection end of the detector (105). The brush ring (301) is movably sleeved on the surface of the support rod (104). A transmission ring (302) is movably sleeved on the surface of the brush ring (301). A lifting rod (303) is fixedly connected to the surface of the transmission ring (302). There are three lifting rods (303) arranged in a ring and evenly distributed. The top of the lifting rod (303) is fixedly connected to the bottom of the sealing plate (201). A force-bearing fan blade (304) is fixedly connected to the bottom of the brush ring (301). A guide assembly (305) is sleeved on the bottom of the surface of the detector (105). A movable assembly (306) is sleeved on the surface of the brush ring (301).

2. The composite fire extinguishing agent concentration detector according to claim 1, characterized in that: The guide assembly (305) includes a conical guide sleeve (305a), the sealing plate (201) is conical, and the surface of the sealing plate (201) is provided with guide grooves (305b). Several guide grooves (305b) are provided and are distributed in a ring at equal intervals. The top of the inner wall of the several guide grooves (305b) is inclined to the same side.

3. The composite fire extinguishing agent concentration detector according to claim 1, characterized in that: The movable component (306) includes a slip ring (306a), and the inner wall of the transmission ring (302) is provided with a movable groove (306b), and the inner wall of the movable groove (306b) is slidably connected to the surface of the slip ring (306a).

4. The composite fire extinguishing agent concentration detector according to claim 1, characterized in that: The top of the limiting rod (204b) is fixedly connected to a limiting plate (204d), and the diameter of the limiting plate (204d) is larger than the diameter of the inner wall of the limiting frame (204c).

5. The composite fire extinguishing agent concentration detector according to any one of claims 2 to 4, characterized in that: The inner wall of the limiting frame (204c) is inlaid with balls (204e), and there are several balls (204e) inlaid and distributed in a ring at equal distances. The limiting frame (204c) is slidably connected to the limiting rod (204b) through the balls (204e).

6. The composite fire extinguishing agent concentration detector according to claim 2, characterized in that: The front and rear sides of the airbag are fixedly connected to a first limiting strip (305c), and a second limiting strip (305d) for limiting the rotation of the airbag ring (202) is movably connected to one side of the limiting strip. The outer side of the second limiting strip (305d) is fixedly connected to the inner wall of the detection box (101).

7. A detection method for a composite fire extinguishing agent concentration detector, characterized in that: The composite fire extinguishing agent concentration detector according to any one of claims 1 to 6 further includes, Initiate testing by the testing agency (100); The automatic closing mechanism (200) is activated to perform intermittent closing; The cleaning mechanism (300) is activated to clean the oxides at the detection end.

8. The detection method of the composite fire extinguishing agent concentration detector according to claim 7, characterized in that: include, The testing agency (100) is activated to draw in the air around the fire extinguishing agent storage tank for testing; During the testing process, the automatic closing mechanism (200) is activated to intermittently close and open the exhaust port to ensure the accuracy of the test. During the closing and opening process of the automatic closing mechanism (200), the cleaning mechanism (300) will be driven simultaneously to brush off and throw off the oxides on the surface of the detection end.

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