Explosion-proof pyrolysis particle detector

Abstract

The utility model relates to the technical field of fire early warning, and discloses an explosion-proof pyrolysis particle detector, which comprises a detection chamber, a vortex tube positioned in the detection chamber, and an adjusting structure arranged in the detection chamber, the adjusting structure comprises a lifting module, a horizontal rotating mechanism located at the top of the lifting module and a vertical rotating mechanism located at the top of the horizontal rotating module. An adjusting platform is fixedly connected to the top of the vertical rotating mechanism, a fixing frame is fixedly connected to the upper surface of the adjusting platform, and a vortex tube is clamped and fixed to the fixing frame; the vortex tube comprises a nozzle, a hot air end and a cold air end; the nozzle is fixedly communicated with one end of the gas pipeline, and the other end of the gas pipeline penetrates through the detection chamber and is fixedly communicated with an air compressor fixed outside the detection chamber. According to the utility model, the motor is arranged to drive horizontal rotation and the steering engine is arranged to drive vertical in-plane rotation, so that the cold air and hot air ejection positions and angles of the vortex tube are adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire early warning technical field, concretely relates to a kind of pyrolysis particle detectors of explosion-proof type. BACKGROUND

[0002] The extremely early stage of fire refers to the stage from being heated beyond the thermal breakdown point to the oxidation combustion and the beginning of carbon smoke production of combustible solids. Studies show that if the early warning technology can provide early warning in the extremely early stage of material combustion, it can provide 4-12 hours of sufficient time to control the combustion conditions to prevent the situation from expanding. In the extremely early stage of fire, due to heating, stable materials begin to enter an unstable decomposition state, and then a large number of invisible submicron particles, i.e. pyrolysis particles, are produced. Therefore, the existing fire early warning devices are all dedicated to detecting pyrolysis particles.

[0003] The cloud and mist generating device in the existing extremely early fire detection device does not meet the intrinsic safety explosion-proof certification requirements, so our company has redesigned a scheme using a pure mechanical vortex tube to generate cloud and mist beads, with the application number 2024116244298 and the name of an intrinsic safety explosion-proof extremely early pyrolysis particle type fire detector. This scheme not only meets the intrinsic safety explosion-proof certification, but also generates cloud and mist beads to realize the detection of pyrolysis particles. However, the existing indoor cloud and mist generating module position is relatively fixed, and the shape and size of the indoor detection space vary in different places. The positional relationship between the cold gas and hot gas ejection ports of the vortex tube directly affects the generation and stability of the cloud and mist. If the distance is too close, the cold and hot gases may mix too early, leading to uneven mixing and affecting the concentration and stability of the cloud and mist. If the distance is too far, the cold and hot gases may not mix sufficiently. Proper angle setting helps to increase the contact area and mixing time of the cold and hot gases, thereby improving the concentration of the cloud and mist. If the angle is not set properly, the cold and hot gases may not mix uniformly, resulting in local overcooling or overheating, which affects the concentration and stability of the cloud and mist. Therefore, adjusting the ejection positions of the cold and hot gases is also important. SUMMARY

[0004] The utility model aims at overcoming the deficiencies in the prior art and providing an explosion-proof pyrolysis particle detector that adjusts the ejection positions and angles of the cold and hot gases of the vortex tube by setting a motor to drive horizontal rotation and a rudder to drive vertical in-plane rotation.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an explosion-proof pyrolysis particle detector includes a detection chamber, a vortex tube located inside the detection chamber, and an adjustment structure set on the bottom surface of the detection chamber to adjust the ejection positions and angles of the vortex tube gas.

[0006] The adjusting structure comprises a lifting module fixed to the inner bottom surface of the detection chamber, a horizontal rotating mechanism located at the top of the lifting module, and a vertical rotating mechanism located at the top of the horizontal rotating mechanism; the top of the vertical rotating mechanism is fixedly connected with an adjusting platform, the upper surface of the adjusting platform is fixedly connected with a fixing frame, and the fixing frame clamps a vortex tube;

[0007] The vortex tube comprises a nozzle, a hot gas end, and a cold gas end; the nozzle is fixedly communicated with one end of a gas conveying pipeline, and the other end of the gas conveying pipeline penetrates through the detection chamber and is fixedly communicated with an air compressor fixed to the outside of the detection chamber.

[0008] Further, one side of the detection chamber is fixedly communicated with an air inlet pipe, and an air extractor is arranged in the air inlet pipe; the side of the detection chamber opposite to the position where the air inlet pipe is located is fixedly communicated with an air outlet pipe.

[0009] Further, the lifting module comprises a lifting column fixed to the inner bottom surface of the detection chamber; and a lifting table is fixedly installed at the top of the lifting column.

[0010] Further, the horizontal rotating mechanism comprises a motor fixed to the upper surface of the lifting table, and a drive shaft fixedly connected to the output end of the motor.

[0011] Further, the vertical rotating mechanism comprises a fixed seat fixed to the bottom of the drive shaft, a rotating shaft rotatably connected to the fixed seat, a rudder fixedly installed outside the fixed seat, and an output end of the rudder fixedly connected to one end of the rotating shaft; the rotating shaft is fixedly connected with a connecting rod perpendicular thereto, and one end of the connecting rod away from the rotating shaft is fixedly connected with the adjusting platform.

[0012] Further, the gas conveying pipeline comprises a first connecting pipe fixedly communicated with the nozzle, a sleeve pipe penetrating through the detection chamber, and an adaptive pipeline slidingly connected in the sleeve pipe; one end of the adaptive pipeline is fixedly communicated with the first connecting pipe through the sleeve pipe; a pipeline placing box is fixedly installed outside the detection chamber, a section of the adaptive pipeline away from the first connecting pipe is placed in the pipeline placing box, the other end of the adaptive pipeline is fixedly communicated with a second connecting pipe, and the second connecting pipe is fixedly communicated with the air compressor through the pipeline placing box.

[0013] Further, the outside of the hot gas end and / or the cold gas end is sleeved with an extension pipe, an electric push rod is fixedly installed on the fixing frame, and the electric push rod is fixedly connected with the corresponding extension pipe through a connecting block.

[0014] Further, a fixed shaft is vertically arranged at the end of the air outlet pipe in the detection chamber, a coil spring is fixedly connected with the fixed shaft and sleeved outside the fixed shaft, and the coil spring is fixedly connected with a coil spring door capable of covering the air outlet pipe.

[0015] Further, the lifting column, the motor, the steering engine, and the electric push rod are provided with wireless network modules for being controlled by an external control module, the vortex tube further comprises a temperature control valve, and the temperature control valve is also electrically connected with a wireless network module; the cloud and mist density detector is arranged in the detection chamber.

[0016] The vortex tube has the advantages that: the motor drives horizontal rotation and the steering engine drives vertical plane rotation, so that the positions and angles of cold gas and hot gas ejected by the vortex tube are adjusted; according to the cloud and mist density detector arranged in the detection chamber and the wireless network modules arranged on the motor, the steering engine, the lifting module, and the electric push rod, the positions and angles of the cold gas and the hot gas can be adjusted in real time even during the working process; when the positions and angles of the vortex tube are adjusted, the gas conveying pipeline can move along with the vortex tube and always keep in communication with the air compressor. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of working principle;

[0018] Figure 2 is a schematic view of external structure of the detector;

[0019] Figure 3 is a schematic view of structure of the air extractor;

[0020] Figure 4 is a schematic view of the gas conveying pipeline;

[0021] Figure 5 is a schematic view of the adjusting structure;

[0022] Figure 6 is Figure 5 is a schematic view of enlarged structure at A in the middle;

[0023] Figure 7 is a schematic view of the coil spring door structure.

[0024] In the drawing: 1, air inlet pipe; 2, detection chamber; 3, air outlet pipe; 4, air extractor; 5, lifting column; 6, lifting table; 7, motor; 8, driving shaft; 9, fixed seat; 10, rotating shaft; 11, steering engine; 12, connecting rod; 13, adjusting platform; 14, fixed frame; 15, nozzle; 16, hot gas end; 17, cold gas end; 18, extension pipe; 19, electric push rod; 20, connecting block; 21, first connecting pipe; 22, sleeve pipe; 23, adaptive pipeline; 24, second connecting pipe; 25, pipeline placing box; 26, air compressor; 27, fixed shaft; 28, coil spring; 29, coil spring door. DETAILED DESCRIPTION

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings and specific 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0027] Example:

[0028] like Figures 1-7 As shown, an explosion-proof pyrolysis particle detector includes a detection chamber 2, a vortex tube located inside the detection chamber 2, and an adjustment structure disposed on the bottom surface inside the detection chamber 2 to adjust the position and angle of the gas ejection from the vortex tube.

[0029] The adjustment structure includes a lifting module fixed to the bottom of the detection chamber 2, a horizontal rotation mechanism located at the top of the lifting module, and a vertical rotation mechanism located at the top of the horizontal rotation module; an adjustment platform 13 is fixedly connected to the top of the vertical rotation mechanism, and a fixing frame 14 is fixedly connected to the upper surface of the adjustment platform 13, and the fixing frame 14 clamps and fixes the vortex tube; the fixing frame 14 includes two semi-circular retaining rings located on both sides of the vortex tube, and a vertical rod fixed to the bottom of the retaining rings, the vertical rod is fixed to the adjustment platform, the retaining rings have a certain elasticity, the two retaining rings close together to lock the vortex tube, and at the same time it is easy to remove;

[0030] The vortex tube includes a nozzle 15, a hot air end 16, and a cold air end 17; the nozzle 15 is fixedly connected to one end of the gas delivery pipe, and the other end of the gas delivery pipe passes through the detection chamber 2 and is fixedly connected to the air compressor 26 fixed outside the detection chamber 2.

[0031] An air inlet pipe 1 is fixedly connected to one side of the detection chamber 2. An air extractor 4 is installed inside the air inlet pipe 1. The air extractor 4 can be an air extraction device designed for small pipes, such as the CY127 micro centrifugal exhaust fan, the CY112 small exhaust fan, the nine-blade wind series, or the PM series. It has a simple structure, light weight, and is easy to install and maintain. An exhaust pipe 3 is fixedly connected to the side of the detection chamber 2 opposite to the location of the air inlet pipe 1. The air inlet pipe 1 and the exhaust pipe 3 are located on the same straight line. The air inlet pipe 1 is also connected to multiple branch pipes with ends extending into multiple positions in the space to be detected.

[0032] The lifting module comprises a lifting column 5 fixed to the inner bottom surface of the detection chamber 2; a lifting platform 6 is fixedly installed on the top of the lifting column 5; the lifting column 5 can be electric or pneumatic, which is prior art.

[0033] The horizontal rotation mechanism comprises a motor 7 fixed to the upper surface of the lifting platform 6, and a vertical driving shaft 8 fixedly connected to the output end of the motor 7; the arrangement realizes horizontal rotation adjustment.

[0034] The vertical rotation mechanism comprises a fixed seat 9 fixed to the bottom of the driving shaft 8, a rotating shaft 10 rotatably connected to the fixed seat 9, a rudder 11 fixedly installed on the outer side of the fixed seat 9, and an output end of the rudder 11 fixedly connected to one end of the rotating shaft 10; a connecting rod 12 perpendicular to the rotating shaft 10 is fixedly connected to the middle of the rotating shaft 10, and one end of the connecting rod 12 away from the rotating shaft 10 is fixedly connected to an adjusting platform 13; the arrangement realizes vertical rotation angle adjustment and can be adjusted together with the horizontal rotation mechanism.

[0035] The gas pipeline comprises a first connecting pipe 21 fixedly communicated with the nozzle 15, a sleeve pipe 22 fixedly penetrating through the detection chamber 2, an adaptive pipeline 23 slidably connected to the inside of the sleeve pipe 22; one end of the adaptive pipeline 23 penetrates through the sleeve pipe 22 and is fixedly communicated with the first connecting pipe 21; a pipeline placing box 25 is fixedly installed outside the detection chamber 2, a section of the adaptive pipeline 23 away from the first connecting pipe 21 is placed in the pipeline placing box 25, the other end of the adaptive pipeline 23 is fixedly communicated with a second connecting pipe 24, and the second connecting pipe 24 penetrates through the pipeline placing box 25 and is fixedly communicated with an air compressor 26. The accumulation means that the length of the accumulated part is much greater than the straight-line distance between the two ends of the accumulated part. The adaptive pipeline 23 is made of a material that can be arbitrarily bent, such as a stainless steel bellows, a PU pipe, or a pipeline made of silica gel.

[0036] The outer part of the hot gas end 16 and / or the cold gas end 17 is sleeved with an extension pipe 18, the fixed frame 14 is fixedly installed with an electric push rod 19, the electric push rod 19 is fixed with the corresponding extension pipe 18 through a connecting block 20, and the position and angle of the gas ejection can be adjusted in a larger range by arranging the extension pipe 18.

[0037] A fixed shaft 27 is vertically arranged at the end of the exhaust pipe 3 inside the detection chamber 2, the fixed shaft 27 is sleeved with a fixedly connected coil spring 28, and the coil spring 28 is fixedly connected with a coil spring door 29 capable of covering the exhaust pipe 3.

[0038] The lifting column 5, the motor 7, the rudder 11, and the electric push rod 19 are all provided with a wireless network module for being controlled by an external host computer, the vortex tube also comprises a temperature control valve, and the temperature control valve is also electrically connected with a wireless network module; a cloud and mist concentration detector is arranged in the detection chamber 2.

[0039] When detecting pyrolysis particles, the air extractor 4 works, the detection chamber 1 is provided with a laser detection cavity and a photoelectric conversion chip, the laser detection cavity captures pyrolysis particles in cloud water droplets, the outside of the detection chamber 1 is connected with a filter circuit and an amplifier circuit having the photoelectric conversion chip, the electric pulse signal converted by the photoelectric conversion chip is connected with the upper computer after passing through the filter circuit and the amplifier circuit, the upper computer processes data according to the Miller algorithm after removing noise signals from the electric pulse signal, and the number of pyrolysis particles can be measured; then the upper computer compares the number of pyrolysis particles with a preset alarm value, and if the concentration of pyrolysis particles reaches the preset value, the upper computer controls the alarm system and the fire extinguishing execution system to work simultaneously. The wireless network module is in communication connection with the upper computer.

[0040] The vortex tube adjusting working process: the position and angle of the vortex tube can be adjusted according to the size and shape of the detection chamber 2 before the vortex tube and the adjusting structure are installed into the detection chamber 2, or the vortex tube can be installed into the detection chamber 2 and then adjusted; the lifting column 5 is started to adjust the height of the vortex tube in a large range, the motor 7 is started to drive the driving shaft 8 to rotate, the driving shaft 8 drives the vertical rotating mechanism to rotate, and then drives the adjusting platform 13 to rotate, so as to adjust the jetting positions of the hot gas end 16 and the cold gas end 17 of the vortex tube in the horizontal plane; the steering wheel 11 is started to drive the rotating shaft 10, the rotating shaft 10 drives the connecting rod 12, and the connecting rod 12 drives the adjusting platform 13 to rotate in the vertical plane, so as to adjust the inclination angle of the vortex tube, and then adjust the jetting positions and angles of the hot gas end 16 and the cold gas end 17; the electric push rod 19 is started to push the extension pipe 18 to extend and retract, so as to adjust the jetting positions of the hot gas and the cold gas; the adjusting structure is controlled to change the jetting positions and angles of the hot gas end 16 and the cold gas end 17 according to the cloud concentration measured by the cloud detector and the time when the preset concentration is reached.

[0041] When the pressure of the cloud in the detection chamber 2 and the gas extracted by the air extractor 4 is greater than the spring force of the coil spring 28, the coil spring door 29 rotates, thereby opening an exhaust space, so that the cloud concentration can be kept at a certain value at all times, and the gas can be discharged. Keeping the cloud concentration is conducive to more accurately detecting the concentration of pyrolysis particles. If there is no need for detection, the air extractor 4 stops extracting, and the coil spring door 29 is closed again under the restoring action of the coil spring 28.

[0042] The above description is only used to illustrate the technical scheme of the present application, not to limit it. Other modifications or equivalent replacements to the technical scheme of the present application made by those skilled in the art should be covered in the scope of the claims of the present application.

Claims

1. An explosion-proof pyrolysis particle detector, characterized in that: It includes a detection chamber (2), a vortex tube located inside the detection chamber (2), and an adjustment structure set on the bottom surface inside the detection chamber (2) to adjust the position and angle of the gas ejection from the vortex tube; The adjustment structure includes a lifting module fixed to the bottom surface inside the detection chamber (2), a horizontal rotation mechanism located at the top of the lifting module, and a vertical rotation mechanism located at the top of the horizontal rotation module; an adjustment platform (13) is fixedly connected to the top of the vertical rotation mechanism, and a fixing frame (14) is fixedly connected to the upper surface of the adjustment platform (13), and the fixing frame (14) clamps and fixes the vortex tube. The vortex tube includes a nozzle (15), a hot air end (16), and a cold air end (17); the nozzle (15) is fixedly connected to one end of the gas transmission pipeline, and the other end of the gas transmission pipeline passes through the detection chamber (2) and is fixedly connected to an air compressor (26) fixed outside the detection chamber (2).

2. The explosion-proof pyrolysis particle detector according to claim 1, characterized in that: An air inlet pipe (1) is fixedly connected to one side of the detection chamber (2), and an air pump (4) is installed inside the air inlet pipe (1); an exhaust pipe (3) is fixedly connected to the side of the detection chamber (2) opposite to the location of the air inlet pipe (1).

3. The explosion-proof pyrolysis particle detector according to claim 1, characterized in that: The lifting module includes a lifting column (5) fixed to the bottom surface inside the detection chamber (2); a lifting platform (6) is fixedly installed on the top of the lifting column (5).

4. The explosion-proof pyrolysis particle detector according to claim 3, characterized in that: The horizontal rotation mechanism includes a motor (7) fixed on the upper surface of the lifting platform (6), and the output end of the motor (7) is fixedly connected to a drive shaft (8).

5. The explosion-proof pyrolysis particle detector according to claim 4, characterized in that: The vertical rotation mechanism includes a fixed base (9) fixed to the bottom of the drive shaft (8), a rotating shaft (10) rotatably connected to the fixed base (9), a servo motor (11) fixedly installed on the outside of the fixed base (9), the output end of the servo motor (11) being fixedly connected to one end of the rotating shaft (10); a connecting rod (12) perpendicular to the rotating shaft (10) is fixedly connected to the rotating shaft (10), and the end of the connecting rod (12) away from the rotating shaft (10) is fixedly connected to the adjustment platform (13).

6. The explosion-proof pyrolysis particle detector according to claim 1, characterized in that: The gas delivery pipeline includes a first connecting pipe (21) fixedly connected to the nozzle (15), a sleeve (22) passing through the detection chamber (2), and an adapting pipe (23) slidably connected to the sleeve (22) through the inside of the sleeve (22); one end of the adapting pipe (23) passes through the sleeve (22) and is fixedly connected to the first connecting pipe (21); a pipe placement box (25) is fixedly installed outside the detection chamber (2), a section of the adapting pipe (23) away from the first connecting pipe (21) is stacked inside the pipe placement box (25), and the other end of the adapting pipe (23) is fixedly connected to a second connecting pipe (24), and the second connecting pipe (24) passes through the pipe placement box (25) and is fixedly connected to the air compressor (26).

7. The explosion-proof pyrolysis particle detector according to claim 1, characterized in that: An extension tube (18) is sleeved on the outside of the hot air end (16) and / or the cold air end (17). An electric push rod (19) is fixedly installed on the fixing frame (14). The electric push rod (19) and the corresponding extension tube (18) are fixed by a connecting block (20).

8. The explosion-proof pyrolysis particle detector according to claim 2, characterized in that: The exhaust pipe (3) is vertically mounted with a fixed shaft (27) at the end inside the detection chamber (2). A coil spring (28) is fixedly connected to the outside of the fixed shaft (27). The coil spring (28) is fixedly connected to a coil spring door (29) that can cover the exhaust pipe (3).

9. The explosion-proof pyrolysis particle detector according to claim 3, characterized in that: The lifting column (5), motor (7), servo motor (11), and electric push rod (19) are all equipped with wireless network modules for control by an external control module. The eddy tube also includes a temperature control valve, which is also electrically connected to a wireless network module. A cloud and fog concentration detector is installed in the detection chamber (2).

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