Probe structure of spark detector

Abstract

The invention relates to the technical field of spark detection heads, in particular to a probe structure of a spark detector, which comprises a control circuit board used for detecting sparks and an explosion-proof shell used for assembling the control circuit board, and the surface of the explosion-proof shell extends and protrudes and is provided with a light condensation piece used for improving the sensitivity of spark detection. A light-transmitting shaft used for enlarging the detection range is assembled on the protruding portion of the anti-explosion shell. According to the invention, the rotatable light-transmitting shaft or the rotatable cleaning assembly is arranged, the response range is expanded by using the light-transmitting shaft, so that the light signal can be transmitted to the position of the light-condensing part to be received when passing through the light-transmitting shaft, the receiving stability of the light signal is ensured, and the surface of the light-transmitting shaft is cleaned by using the cleaning assembly in the process, so that the light-transmitting effect is improved. In the cleaning process, only part of the area of the surface of the light-transmitting shaft is cleaned alternately, so that it can be guaranteed that light signals are transmitted in a certain area all the time, dust accumulation is avoided, and the accuracy of spark detection is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of spark detection heads, and specifically provides a probe structure of a spark detector. Background Art

[0002] The internal structure of a spark probe usually includes optical components, sensors, signal processing circuits, etc. The sensors and signal processing circuits are all encapsulated inside an explosion-proof mounting shell (usually circular or square). The optical components will extend and protrude from the surface of the mounting shell. During installation, the extended part needs to be placed inside the pipeline. If there is a spark inside the pipeline, then the optical components will transmit the optical signal to the sensors, and the signal processing circuit will give the next instruction. Inside a pipeline with a larger diameter, spark probes usually need to be symmetrically installed at four positions, namely above, below, left, and right along the axis.

[0003] Spark probes are usually assembled inside pipelines for transporting powder particles. A blower is used to transport the powder particles. As the usage time gradually increases, dust and powder may accumulate on the surface of the probes, and the accumulation degree on the surface of the probes at different positions is different. The dust and powder will affect the transmission of the optical signal by the optical components, thereby affecting the detection accuracy. Therefore, it is necessary to regularly disassemble the probes to clean the optical components, which is rather cumbersome and inconvenient to use. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a probe structure of a spark detector to solve the problems mentioned in the above background art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A probe structure of a spark detector includes a control circuit board for detecting sparks and an explosion-proof housing for assembling the control circuit board. The surface of the explosion-proof housing extends and protrudes, and is equipped with a condenser for improving the sensitivity of detecting sparks. The protruding part of the explosion-proof housing is equipped with a light-transmitting shaft for expanding the detection range. The axis of the light-transmitting shaft is parallel to the axial direction of the pipeline to be detected; a packaging sleeve for installing and connecting the condenser is assembled on the surface of the light-transmitting shaft, and a part of the light-transmitting shaft is exposed to the air. The light-transmitting shaft and the condenser are in a mutually perpendicular installation state. The condenser divides the light-transmitting shaft into three regions. Two reflecting plates are assembled inside the light-transmitting shaft, and the two reflecting plates are respectively located in the two regions on both sides of the condenser; a cleaning component is assembled on the surface of the packaging sleeve for cleaning the three regions of the light-transmitting shaft in a segmented manner to ensure that there is always a region for conducting the optical signal of the sparks in the pipeline.

[0006] Preferably, both ends of the packaging sleeve are provided with symmetric inclined surfaces that are inclined towards the midline position. The axis of the light-transmitting shaft coincides with the axis of the packaging sleeve, and the diameter of the light-transmitting shaft is smaller than the diameter of the packaging sleeve.

[0007] Preferably, the cleaning component includes two cleaning straight rods attached to the surface of the light-transmitting shaft, located in the two side regions of the light-condensing member respectively. The two cleaning straight rods are located at the top and bottom of the light-transmitting shaft respectively. A spiral cleaning connecting rod is provided between the two cleaning straight rods. The cleaning connecting rod is attached to the surface of the light-transmitting shaft and the number of turns is set to half a turn. Circular plates attached to both ends of the light-transmitting shaft are assembled at the ends of the two cleaning straight rods; a semi-circular groove is formed on the surface of the encapsulation sleeve to provide sufficient space for the moving rod of the cleaning component. A rotating component is assembled inside the encapsulation sleeve to drive the rotation of the cleaning component, and a mounting component is assembled inside the encapsulation sleeve to mount and fix the light-transmitting shaft.

[0008] Preferably, the cleaning component includes a cleaning plate assembled on the surface of the encapsulation sleeve. The cleaning plate is attached to the surface of the light-transmitting shaft, and the reflecting plate is movably installed inside the light-transmitting shaft; the reflecting plate is fixedly connected to the encapsulation sleeve through the mounting component, and the light-transmitting shaft is movably connected to the encapsulation sleeve through the rotating component.

[0009] Preferably, the encapsulation sleeve includes an annular sleeve in the middle and cylindrical tubes on both sides. The departing ends of the two cylindrical tubes are set as symmetrical inclined surfaces, and both are inclined towards the position of the annular sleeve. The light-condensing member is assembled at the position of the annular sleeve. The light-transmitting shaft is installed and connected to the encapsulation sleeve through a bearing, and the cleaning component is assembled on the surface of the encapsulation sleeve.

[0010] Preferably, the cleaning component includes two cleaning U-shaped rods attached to the surface of the light-transmitting shaft. The two ends of the cleaning U-shaped rods are fixedly connected to the surfaces of the cylindrical tube and the annular sleeve. A counterweight is assembled on the surface of the reflecting plate to lower the center of gravity of the reflecting plate. The counterweight is installed and connected to the light-transmitting shaft through a bearing; the light-transmitting shaft is installed and connected to the encapsulation sleeve through the rotating component.

[0011] Preferably, the mounting component includes two fixing frames fixedly connected inside the encapsulation sleeve. The light-transmitting shaft or the circular plate is installed and connected to the encapsulation sleeve through the fixing frames.

[0012] Preferably, the rotating component includes a first driving rod assembled inside the encapsulation sleeve through a bearing. The axis of the first driving rod is parallel to the axial direction of the pipeline. Gears that mesh with each other are fixedly sleeved on the surfaces of the circular plate and the first driving rod or on the surfaces of the light-transmitting shaft and the first driving rod. A wind turbine is assembled at the end of the first driving rod.

[0013] Preferably, a plurality of through holes for ventilation are formed on the surface of each blade of the wind turbine.

[0014] Preferably, the rotating assembly includes a second driving rod assembled inside the encapsulation sleeve through a bearing. The axis of the second driving rod is perpendicular to the axis of the pipeline. Bevel gears that mesh with each other are fixedly sleeved on the surfaces of the circular plate and the second driving rod or on the surfaces of the light-transmitting shaft and the second driving rod. A connecting pipe that can move along the axis is assembled on the surface of the explosion-proof housing. The connecting pipe is installed and connected to the second driving rod through a pin shaft. A driving mechanism for driving the connecting pipe to rotate is assembled inside the explosion-proof housing.

[0015] The above technical solution has the following advantages or beneficial effects: The present invention provides a probe structure of a spark detector. By providing a rotatable light-transmitting shaft or a rotatable cleaning assembly, the response range is improved by using the light-transmitting shaft, so that the optical signal will be propagated to the position of the light condensing member for reception when passing through the light-transmitting shaft, thereby ensuring the stability of the optical signal reception. During this process, the cleaning assembly is used to clean the surface of the light-transmitting shaft. Since only some areas on the surface of the light-transmitting shaft are alternately cleaned during cleaning, it is possible to ensure that there is always a certain area for the propagation of the optical signal, and at the same time, the accumulation of dust is avoided, thereby ensuring the accuracy of spark detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, the present invention and its features, shape, and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately drawn to scale, and the focus is on showing the gist of the present invention.

[0017] Figure 1 is a three-dimensional structural schematic diagram of the installation state of a probe structure of a spark detector provided by the present invention.

[0018] Figure 2 is a three-dimensional structural schematic diagram of Embodiment 1.

[0019] Figure 3 is Figure 2 a three-dimensional structural schematic diagram of the encapsulation sleeve from another perspective in

[0020] Figure 4 is a three-dimensional structural schematic diagram of the rotating assembly in Embodiment 1.

[0021] Figure 5 is Figure 4 a front sectional view of

[0022] Figure 6 is a three-dimensional structural schematic diagram of Embodiment 2.

[0023] Figure 7 is a three-dimensional structural schematic diagram of the rotating assembly in Embodiment 2.

[0024] Figure 8 is Figure 7Another perspective three-dimensional structure schematic diagram.

[0025] Figure 9 is Figure 8 The front sectional view of.

[0026] Figure 10 It is the three-dimensional structure schematic diagram of Embodiment 3.

[0027] Figure 11 It is the three-dimensional structure schematic diagram of the rotating component in Embodiment 3.

[0028] Figure 12 It is the front sectional view of the light-transmitting shaft in Embodiment 3.

[0029] Figure 13 It is the three-dimensional structure schematic diagram of the installation state of the spark probe.

[0030] In the figure: 1, explosion-proof shell; 2, light condensing member; 3, light-transmitting shaft; 4, encapsulation sleeve; 5, reflector; 6, cleaning straight rod; 7, cleaning connecting rod; 8, semi-circular groove; 9, cleaning plate; 10, annular sleeve; 11, cylinder; 12, bearing; 13, cleaning U-rod; 14, circular plate; 15, fixing bracket; 16, driving rod one; 17, gear; 18, through hole; 19, driving rod two; 20, connecting pipe; 21, pin shaft; 22, wind fan; 23, bevel gear; 24, installation groove; 25, installation plate; 26, reinforcing plate; 27, threaded pipe; 28, reinforcing bolt. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In order to enable those in the technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Figure 1 A probe structure of a spark detector installed inside a pipeline is provided. The number of probes installed on the pipeline is four, which are respectively located at the upper, lower, left, and right four positions of the pipeline axis, and the installation positions are completely symmetrical. The infrared or ultraviolet sensor inside the probe is relied on to detect the sparks inside the pipeline. In order to improve the accuracy of the sensor response, a light condensing member 2 is usually arranged inside the probe (refer to Figure 2), to increase the intensity of the optical signal, thereby indirectly improving the accuracy. Both the sensor and the corresponding control circuit are assembled inside the explosion-proof enclosure 1 to protect the sensor and the control circuit. A part of the surface of the explosion-proof enclosure 1 extends for installing the light condensing member 2.

[0034] As Figure 2 shown, the extended part of the explosion-proof enclosure 1 is a pipe with internal threads. The surface of the light condensing member 2 is provided with the same matching threads. The light condensing member 2 is installed inside the explosion-proof enclosure 1 by rotation. A light-transmitting shaft 3 is assembled at the end of the light condensing member 2. The axis of the light-transmitting shaft 3 is perpendicular to the axis of the light condensing member 2. A packaging sleeve 4 is assembled on the surface of the light-transmitting shaft 3. The surface of the packaging sleeve 4 also extends a pipe with internal threads. The surface of the extended part of the explosion-proof enclosure 1 is provided with matching threads. The packaging sleeve 4 is also installed on the surface of the explosion-proof enclosure 1 by threads. The two ends of the packaging sleeve 4 are set as symmetric inclined planes and both incline towards the midline position. The axis of the light-transmitting shaft 3 coincides with the axis of the packaging sleeve 4. The diameter of the light-transmitting shaft 3 is smaller than the diameter of the packaging sleeve 4. The packaging sleeve 4 is used to divert the wind direction to reduce the possibility of dust accumulation on the surfaces of the packaging sleeve 4 and the light-transmitting shaft 3.

[0035] When a spark passes through the inside of the pipe, an optical signal will be emitted and received by the light-transmitting shaft 3. The optical signal is transmitted to the inside of the light condensing member 2 through the light-transmitting shaft 3. Therefore, it is necessary to ensure that a part of the light-transmitting shaft 3 is directly exposed to the air. At this time, the light condensing member 2 divides the light-transmitting shaft 3 into three regions, namely the optical signal receiving region where the light condensing member 2 is in direct contact with the light-transmitting shaft 3, and the optical signal transmitting regions on both sides, so as to increase the receiving range of the optical signal, increase the response time, and further improve the response accuracy. At this time, a cleaning component can be assembled on the surface of the packaging sleeve 4 to clean the surface of the light-transmitting shaft 3 in a segmented manner, so as to ensure that during the cleaning process, there is still a certain region that can transmit and receive optical signals.

[0036] For the different installation positions of the probe structure inside the pipe, this application proposes three embodiments for the probe structure to realize that when cleaning the surface of the light-transmitting shaft 3, the normal use of the spark detection function is still not affected.

[0037] Embodiment 1

[0038] For the probe structures installed at the top and both sides, as Figures 2 - 5As shown, there are two oval reflectors 5 inside the light-transmitting shaft 3, which are respectively located in the light signal propagation area of the light-transmitting shaft 3. It should be noted that the reflectors 5 are inclined to ensure that when the light signal is transmitted to the surface of the reflector 5, the reflector 5 can transmit it to the light signal receiving area. There are two fixing brackets 15 assembled inside the encapsulation sleeve 4, which are respectively located at both ends of the encapsulation sleeve 4. One end of the fixing bracket 15 extends and is fixed on the surface of the reflector 5. The two ends of the light-transmitting shaft 3 are also provided with circular tubes sleeved on the surface of the connection position between the fixing bracket 15 and the reflector 5 to ensure that during the rotation of the light-transmitting shaft 3, the reflector 5 is in a fixed position, thereby ensuring that the light signal can be stably and correctly transmitted.

[0039] A cleaning plate 9 is assembled at the edge position of the surface of the encapsulation sleeve 4. The cleaning plate 9 must be located below the light-transmitting shaft 3. When the light-transmitting shaft 3 rotates, the dust is squeezed by the cleaning plate 9 and accumulates at this position, and finally is taken away by the wind. The part that rotates into the encapsulation sleeve 4 will be cleaned, thereby providing a better light signal propagation and reception path to improve the accuracy of the sensor response. The light-transmitting shaft 3 is driven to rotate by a rotating assembly. During the whole process, since the light-transmitting shaft 3 is continuously cleaned, dust accumulation on the surface of the light-transmitting shaft 3 can be prevented, making it more convenient to use.

[0040] Embodiment 2

[0041] For the probe structures at the top and both sides, as Figures 6 - 9 shown, different from the installation method of the reflector 5 in Embodiment 1, the reflector 5 and the light-transmitting shaft 3 at this position are fixedly connected. The light-transmitting shaft 3 is fixedly assembled inside the encapsulation sleeve 4 through the fixing bracket 15. The difference is that there are two cleaning straight rods 6 attached to the light signal propagation area on the surface of the light-transmitting shaft 3. The two cleaning straight rods 6 are respectively located at the top and the top of the light-transmitting shaft 3, that is, the distance between the two cleaning straight rods 6 is the diameter of the light-transmitting shaft 3.

[0042] The two cleaning straight rods 6 are connected by a spiral cleaning connecting rod 7. The cleaning straight rods 6 and the cleaning connecting rod 7 are of an integrally formed structure, and the number of turns of the cleaning connecting rod 7 is half a turn.

[0043] Circular plates 14 are fixed at the ends of the two cleaning connecting rods 7. The circular plates 14 are driven to rotate by a rotating assembly, and then drive the cleaning connecting rod 7 and the cleaning straight rods 6 to rotate around the light-transmitting shaft 3, thereby realizing the cleaning of the surface of the light-transmitting shaft 3. And because the positions of the cleaning straight rods 6 are different, during the rotation cleaning process, one of the light signal propagation areas will still work, thereby realizing the detection of sparks. It should be noted that since the cleaning straight rods 6 and the cleaning connecting rod 7 need to rotate, a semi-circular groove 8 needs to be opened on the surface of the encapsulation sleeve 4 for the cleaning straight rods 6 and the cleaning connecting rod 7 to pass through.

[0044] Compared with Embodiment 1, during the rotation of the cleaning straight rod 6 and the cleaning connecting rod 7, usually dust may rotate and accumulate at the bottom position and then fall off. However, there may still be some dust entering the inside of the encapsulation sleeve 4, and then adsorbing on the surface of the light condensing member 2 (refer to Figure 2 ). However, due to the fixed connection between the reflector 5 and the light transmission shaft 3, the inside of the light transmission shaft 3 is completely sealed, and the inside of the light transmission shaft 3 of the reflector 5 has always been in a dust-free state. During actual use, the probe structures of Embodiment 2 can be installed at both sides, and the probe structure of Embodiment 1 can be installed at the top.

[0045] Embodiment 3

[0046] For the probe structure installed at the bottom position, as Figures 10 - 12 shown, the encapsulation sleeve 4 includes an annular sleeve 10 in the middle and cylinders 11 on both sides. Similarly, the departing ends of the two cylinders 11 are provided with symmetric inclined surfaces, and both are inclined towards the position of the annular sleeve 10 to prevent the accumulation of dust. At this time, the light condensing member 2 is assembled at the position of the annular sleeve 10, and the light transmission shaft 3 is installed and connected to the annular sleeve 10 and the cylinders 11 through bearings 12. Two cleaning U-shaped rods 13 are assembled between the two cylinders 11 and the annular sleeve 10. The surface of the cleaning U-shaped rod 13 is attached to the surface of the light transmission shaft 3. The two ends of the cleaning U-shaped rod 13 are fixedly connected to the surfaces of the cylinders 11 and the annular sleeve 10, and the cleaning U-shaped rod 13 is in the lowest position.

[0047] Two reflectors 5 are assembled inside the light transmission shaft 3. The reflectors 5 are inclined to ensure that when the optical signal is transmitted to the surface of the reflector 5, the reflector 5 can transmit it to the optical signal receiving area again. At this time, counterweights need to be assembled on the surface of the reflector 5, and the purpose is to lower the center of gravity of the entire reflector 5. Similarly, the reflector 5 is installed inside the light transmission shaft 3 through a bearing 12. During the rotation of the light transmission shaft 3, the reflector 5 is always in the same state to ensure the smooth propagation of the optical signal.

[0048] The rotation assembly is used to drive the light transmission shaft 3 to rotate, and the cleaning U-shaped rod 13 accumulates the dust at the bottom position of the pipeline and blows it away with the wind cleaning.

[0049] In Embodiment 1, Embodiment 2 and Embodiment 3, the rotation assembly is required to drive. In this application, the rotation assembly is divided into two forms.

[0050] As Figure 2 , Figure 6 and Figure 10As shown, the rotating assembly includes a first driving rod 16 assembled inside the encapsulation sleeve 4. The first driving rod 16 is fixedly installed through a bearing 12. At this time, the bearing 12 preferably has a sealing function. The axis of the first driving rod 16 is parallel to the axis of the pipeline. Gears 17 that mesh with each other are fixedly sleeved on the surfaces of the circular plate 14 and the first driving rod 16, or on the surfaces of the light-transmitting shaft 3 and the first driving rod 16. A wind turbine 22 is assembled at the end of the first driving rod 16, and the wind inside the pipeline is used to drive the wind turbine 22 to rotate, thereby realizing the rotating function. Since the surface of the light-transmitting shaft 3 will be worn during cleaning, it is necessary to effectively control the cleaning speed. In actual use, the wind force for conveying dust in the pipeline is usually large. Therefore, ventilation through holes 18 need to be opened on the surface of each fan blade to reduce the rotation speed of the first driving rod 16, indirectly slowing down the wear on the surface of the light-transmitting shaft 3, thereby increasing the service life.

[0051] Driven by the wind force inside the pipeline itself can effectively reduce the usage cost.

[0052] As Figure 4 、 Figures 7 - 8 and Figure 11 shown, the rotating assembly includes a second driving rod 19 assembled inside the encapsulation sleeve 4. The second driving rod 19 is installed and connected through a bearing. The axis of the second driving rod 19 is perpendicular to the axis of the pipeline. Bevel gears 23 that mesh with each other are fixedly sleeved on the surfaces of the circular plate 14 and the second driving rod 19, or on the surfaces of the light-transmitting shaft 3 and the second driving rod 19. A connecting pipe 20 that can move along the axis is assembled on the surface of the explosion-proof shell 1, and a driving mechanism (not shown in the figure) for driving the connecting pipe 20 to rotate is assembled inside. The connecting pipe 20 and the second driving rod 19 are installed and connected through a pin shaft 21. The driving mechanism drives the second driving rod 19 to rotate, thereby realizing the rotating function.

[0053] The stability of rotation can be ensured through an external driving mechanism.

[0054] Similarly, the two forms of the rotating assembly can be combined for use. The second driving rod 19 is used to judge whether the wind turbine 22 is in a normal working state. If the wind turbine 22 fails, the driving mechanism can be used to make the second driving rod 19 rotate.

[0055] As Figure 12As shown, due to the change in the probe structure, when assembling the probe, it is necessary to open a relatively long installation groove 24 on the surface of the pipeline, but the length is less than the length of the light-transmitting shaft 3. Place the light-transmitting shaft 3 and the entire encapsulation sleeve 4 inside the pipeline. The extended part of the encapsulation sleeve 4 is located outside the pipeline. Sleeve an installation plate 25 on this extended part. The installation plate 25 is located inside the installation groove 24. Provide an integrally formed threaded pipe 27 on the surface of the explosion-proof housing 1. Assemble a reinforcement bolt 28 inside the threaded pipe 27. Rotatably install a reinforcement plate 26 on the surface of the reinforcement bolt 28. The reinforcement plate 26 abuts against the surface of the installation plate 25.

[0056] During assembly, it is necessary to rotate the reinforcement bolt 28 so that the reinforcement plate 26 abuts against the surfaces of the installation plate 25 and the pipeline, thereby improving the firmness of the installation.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0058] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0059] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above specific implementation manners. The equipment and structures not described in detail therein should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. The probe structure of a spark detector, comprising a control circuit board for detecting sparks and an explosion-proof housing for assembling the control circuit board. The surface of the explosion-proof housing extends and protrudes, and a light condensing member for improving the sensitivity of spark detection is assembled. It is characterized in that: A light-transmitting shaft for increasing the detection range is assembled at the convex part of the explosion-proof shell, and the axis of the light-transmitting shaft is parallel to the axial direction of the pipeline to be detected; A packaging sleeve for installing and connecting a condenser is assembled on the surface of the light-transmitting shaft, and a part of the light-transmitting shaft is exposed to the air. The light-transmitting shaft and the condenser are installed perpendicular to each other. The condenser divides the light-transmitting shaft into three regions, and two reflecting plates are assembled inside the light-transmitting shaft. The two reflecting plates are respectively located in the two side regions of the condenser; A cleaning component is assembled on the surface of the packaging sleeve for alternately cleaning the three regions of the light-transmitting shaft to prevent the accumulation of dust and ensure that the light-transmitting shaft always transmits the optical signal of the spark in the pipeline.

2. The probe structure of a spark detector according to claim 1, characterized in that: Both ends of the packaging sleeve are provided with symmetric inclined surfaces that are inclined towards the midline position. The axis of the light-transmitting shaft coincides with the axis of the packaging sleeve, and the diameter of the light-transmitting shaft is smaller than the diameter of the packaging sleeve.

3. The probe structure of a spark detector according to claim 1, characterized in that: The cleaning component includes two cleaning straight rods that fit on the surface of the light-transmitting shaft, which are respectively located in the two side regions of the condenser. The two cleaning straight rods are respectively located at the top and bottom of the light-transmitting shaft. A spiral cleaning connecting rod is arranged between the two cleaning straight rods. The cleaning connecting rod fits on the surface of the light-transmitting shaft, and the number of turns is set to half a turn. Circular plates that fit on both ends of the light-transmitting shaft are assembled at the ends of the two cleaning straight rods; A semi-circular groove is formed on the surface of the packaging sleeve to provide enough space for the moving rod of the cleaning component. A rotating component is assembled inside the packaging sleeve for driving the rotation of the cleaning component, and a mounting component is assembled inside the packaging sleeve for installing and fixing the light-transmitting shaft.

4. The probe structure of a spark detector according to claim 1, characterized in that: The cleaning component includes a cleaning plate assembled on the surface of the packaging sleeve. The cleaning plate fits on the surface of the light-transmitting shaft, and the reflecting plate is movably installed inside the light-transmitting shaft; The reflecting plate is fixedly connected to the packaging sleeve through the mounting component, and the light-transmitting shaft is movably connected to the packaging sleeve through the rotating component.

5. The probe structure of a spark detector according to claim 1, characterized in that: The packaging sleeve includes a central annular sleeve and two cylindrical tubes on both sides. The opposite ends of the two cylindrical tubes are provided with symmetric inclined surfaces that are inclined towards the position of the annular sleeve. The condenser is assembled at the position of the annular sleeve. The light-transmitting shaft and the packaging sleeve are installed and connected through a bearing, and the cleaning component is assembled on the surface of the packaging sleeve.

6. The probe structure of a spark detector according to claim 5, characterized in that: The cleaning component includes two cleaning U-shaped rods that fit on the surface of the light-transmitting shaft. The two ends of the cleaning U-shaped rods are fixedly connected to the surfaces of the cylindrical tube and the annular sleeve. A counterweight block is assembled on the surface of the reflecting plate for reducing the center of gravity of the reflecting plate. The counterweight block and the light-transmitting shaft are installed and connected through a bearing; The light-transmitting shaft is installed and connected to the packaging sleeve through the rotating component.

7. The probe structure of a spark detector according to claim 3 or 4, characterized in that: The mounting component includes two fixing frames fixedly connected inside the packaging sleeve. The light-transmitting shaft or the circular plate is installed and connected to the packaging sleeve through the fixing frame.

8. The probe structure of a spark detector according to any one of claims 3, 4, and 6, characterized in that: The rotating component includes a driving rod one assembled inside the packaging sleeve through a bearing. The axis of the driving rod one is parallel to the axis of the pipeline. Gears that mesh with each other are fixedly sleeved on the surfaces of the circular plate and the driving rod one or on the surfaces of the light-transmitting shaft and the driving rod one. A wind turbine is assembled at the end of the driving rod one.

9. The probe structure of a spark detector according to claim 8, characterized in that: A plurality of through holes for ventilation are formed on the surface of each blade of the wind fan.

10. The probe structure of a spark detector according to any one of claims 3, 4, and 6, characterized in that: The rotating assembly includes a second driving rod assembled inside the encapsulation sleeve through a bearing. The axis of the second driving rod is perpendicular to the axis of the pipeline. Bevel gears that mesh with each other are fixedly sleeved on the surfaces of the circular plate and the second driving rod or on the surfaces of the light-transmitting shaft and the second driving rod. A connecting pipe that can move along the axis is assembled on the surface of the explosion-proof housing. The connecting pipe is installed and connected to the second driving rod through a pin shaft. A driving mechanism for driving the connecting pipe to rotate is assembled inside the explosion-proof housing.

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