Explosion-proof infrared high-speed ball

Abstract

The invention discloses an explosion-proof infrared high-speed ball, comprising a first cavity, a second cavity and a third cavity; wherein a pitch rotation mechanism for driving the second cavity to realize pitch rotation is also arranged in the second cavity and the third cavity, the pitch rotation mechanism comprises a second motor arranged in the second cavity, a reduction transmission mechanism arranged in the third cavity, an inner transmission shaft transmission-connected between the second motor and the reduction transmission mechanism, and an outer transmission shaft transmission-connected between the reduction transmission mechanism and the second cavity, and the outer transmission shaft is rotationally connected to the outside of the inner transmission shaft, one end of the outer transmission shaft and the inner transmission shaft extends into the second cavity, and the other end extends into the third cavity; the device seals the motor in the second cavity to ensure the explosion-proof safety of the device, and arranges the transmission mechanism connected with the motor outside the second cavity, so that the second cavity for driving the camera to rotate and shoot is lighter in weight, smaller in size, and more sensitive when rotating and shooting.

Description

Technical Field

[0001] The invention belongs to the field of security monitoring equipment, and in particular relates to an explosion-proof infrared high-speed ball. Background Art

[0002] The explosion-proof infrared high-speed ball is a highly integrated explosion-proof camera, which has both explosion-proof and infrared shooting functions, and can realize fast and accurate positioning and rotation of the camera. It has been widely used in the explosion-proof field in recent years. In the prior art, two motors are generally used in explosion-proof high-speed balls to drive the overall horizontal rotation of the body and the pitch rotation of the second cavity of the body respectively. The camera is set in the second cavity. Based on the explosion-proof requirements of the equipment, the two motors must be enclosed inside the shell to prevent the sparks and arcs generated by the motors from propagating outside the shell. Since the motor needs to drive the body to rotate through a transmission mechanism such as a worm gear and a pulley, if the transmission mechanism is enclosed in the cavity together with the motor, then for the second cavity, first, there is not enough space in the cavity where the camera has been installed to install multiple parts at the same time, and second, the transmission mechanism has a large dead weight. Setting it in the second cavity will affect the flexibility of the pitch rotation and reduce the sensitivity of the equipment.

[0003] A similar explosion-proof infrared camera is disclosed in the utility model patent with application number 201620140834.7. This solution sets up two upper and lower cavities, and sets the auxiliary transmission mechanism that drives the motor to rotate in pitch in the second cavity. Although this setting can also achieve the purpose of pitch shooting of the device, due to the complicated structure in the second cavity, the overall weight of the second cavity is very large and the volume is relatively increased. Therefore, the second cavity is not light enough and the flexibility cannot be guaranteed during pitch rotation.

[0004] In the invention patent with application number 201110094202.3, two upper and lower cavities are also set up. This invention encloses two motors in the first cavity at the same time, and uses a synchronous belt to connect one of the motors to the second cavity to drive the pitch rotation of the second cavity. The defect of this solution is that the synchronous belt between the motor and the second cavity is too long, which is easy to vibrate during the transmission process, affecting the motor's control of the second cavity, making the rotation of the second cavity not accurate and timely enough.

[0005] In addition, the rotation speed of the explosion-proof high-speed ball is generally not higher than 120° / s. The speed of a general motor is much greater than the rotation speed of the high-speed ball, and the motor will vibrate and make loud noises in the low-speed range. In the above two solutions, directly using a motor to drive the explosion-proof high-speed ball will cause its working state to be unstable and cannot meet the speed and accuracy requirements during rotation. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a new type of explosion-proof infrared high-speed ball. By setting up three cavities, the transmission mechanism that drives the pitch rotation of the equipment is separately enclosed in one cavity, and the power is transmitted back to the cavity equipped with the pitch motor through the synchronous transmission shaft structure. This not only achieves the purpose of enclosing the motor to meet the explosion-proof requirements, but also greatly reduces the weight and volume of the cavity that drives the pitch rotation of the camera, and has higher flexibility when rotating.

[0007] In order to solve the above technical problems, the technical solution of the present invention is as follows: an explosion-proof infrared high-speed ball, comprising a first cavity that rotates horizontally, a second cavity that rotates in pitch, and a third cavity that suspends the second cavity below the first cavity; wherein, the second cavity and the third cavity are also provided with a pitch rotation mechanism that drives the second cavity to achieve pitch rotation, the pitch rotation mechanism comprises a second motor arranged in the second cavity, a reduction transmission mechanism arranged in the third cavity, and an inner transmission shaft that is transmission-connected between the second motor and the reduction transmission mechanism and an outer transmission shaft that is transmission-connected between the reduction transmission mechanism and the second cavity, and the outer transmission shaft is rotationally connected to the outside of the inner transmission shaft, one end of the outer transmission shaft and the inner transmission shaft extends into the second cavity, and the other end extends into the third cavity.

[0008] On the one hand, the above structure encapsulates the pitch rotation mechanism and the horizontal rotation mechanism in two different cavities, and then encapsulates the mechanical transmission part and the electrical part of the pitch rotation mechanism in different cavities. After two-level differentiation, the different mechanisms are separated, and the danger sources and explosion-proof points are differentiated through the encapsulation and isolation of different cavities, so that the explosion hazard can be locally isolated to improve safety. In addition, the separation of the mechanical and electrical parts of the pitch rotation mechanism can reduce the volume and weight of the second cavity, make the overall equipment more miniaturized, and reduce the performance requirements for the second motor.

[0009] Furthermore, a central fixed axis is provided in the first cavity, a photoelectric switch bracket is provided on the inner wall of the first cavity, a photoelectric switch sensing sheet is provided at the lower end of the central fixed axis, the photoelectric switch sensing sheet is fixed, and the photoelectric switch bracket rotates with the rotation of the first cavity. When the photoelectric switch bracket rotates to contact with the photoelectric switch sensing sheet, this angular position is the rotation reference position.

[0010] The rotation reference position is the initial position of the horizontal rotation of the device. Whenever the horizontal rotation reaches the position where the bracket and the sensor sheet are in contact, the angle signal will return to zero. When the first cavity rotates again, it can rotate based on the initial position, which is conducive to more precise control of the horizontal rotation angle.

[0011] In order to supply power to the electrical equipment in the second cavity and make the second cavity rotate more smoothly, a further solution is: a fourth cavity is movably connected to the other side of the second cavity, the fourth cavity is symmetrically arranged with the third cavity, the upper end of the fourth cavity is sealedly connected to the first cavity, a cable channel is provided at the connection, and the cable channel passes through the fourth cavity and enters the second cavity.

[0012] The fourth cavity is arranged opposite to the third cavity, which not only can support the second cavity more stably and make the pitch and rotation of the second cavity more stable, but also a cable channel for cable routing is separately arranged in the fourth cavity, that is, the cable as the explosive point is separately enclosed in the fourth cavity, the danger source is differentiated again, and the explosion-proof performance of the equipment is upgraded again.

[0013] Furthermore, a first pulley is provided in the second cavity, the first pulley is connected to the output shaft of the second motor via a synchronous belt, and the core of the first pulley is fixedly connected to one end of the inner transmission shaft.

[0014] Because other components such as cameras need to be placed in the second cavity, it is difficult for the motor output end to be directly connected to the inner transmission shaft. Setting the first pulley not only enables the second motor to be connected to the inner transmission shaft, but also has a deceleration effect, thereby reducing the deceleration pressure of the deceleration transmission mechanism in the third cavity.

[0015] Furthermore, the reduction transmission mechanism includes a fixed shaft arranged parallel to the inner transmission shaft, a second pulley, a third pulley and a fourth pulley, the second pulley is sleeved on the output end of the inner transmission shaft, the third pulley is sleeved on the fixed shaft, and the fourth pulley is fixedly sleeved on the outer transmission shaft, the second pulley is connected to the third pulley by a synchronous belt, the third pulley is connected to the fourth pulley by another synchronous belt, and a tensioner is provided on the synchronous belt between the third pulley and the fourth pulley.

[0016] Furthermore, an annular protrusion is fixedly provided on the inner wall of the connection between the third cavity and the external transmission shaft, the annular protrusion is rotatably connected to the external transmission shaft, and a skeleton oil seal is also provided between the annular protrusion and the external transmission shaft, and the skeleton oil seal seals the inside and outside of the third cavity; preferably, the annular protrusion and the external transmission shaft are connected via a deep groove ball bearing.

[0017] The annular protrusion can not only support the nested inner transmission shaft and outer transmission shaft, but also enable the outer transmission shaft to rotate relative to the inner shaft and the annular protrusion at the same time. The outer transmission shaft rotates more smoothly under the action of the deep groove ball bearing, and has better flexibility when driving the second cavity to rotate.

[0018] Furthermore, a wall-mounted bracket is fixedly connected to the top of the first cavity, and a cable introduction device is provided in the central fixed axis, and the cable introduction device introduces the cable in the wall-mounted bracket into the first cavity.

[0019] Furthermore, the third cavity and the fourth cavity are respectively provided with an inspection door, and the inspection door is provided with a pressure plate, which can completely cover the inspection door, and the pressure plate is detachably connected to the third / fourth cavity by bolts.

[0020] Since there are multiple parts in the third cavity and the fourth cavity, the inspection door can meet the needs of inspection and replacement of the parts installed inside. The pressure plate and the inspection door are detachably connected. In order to ensure the airtightness of the inspection door, multiple sets of screws are used to connect the inspection door to the fixing frame shell.

[0021] Furthermore, the second cavity also includes a front cover and a rear cover respectively connected to the front and rear ends of the second cavity, the front cover is sealed with tempered glass, and a plurality of infrared lamp holes are provided on the front cover. Infrared lamps are provided on the inner surface of the front cover corresponding to the infrared lamp holes, and a wiper is provided on the outer surface of the front cover.

[0022] Furthermore, a camera, a wiper motor and a wiper motor bracket are also provided in the second cavity. The camera is fixedly installed in the second cavity. The wiper motor is connected to the camera through the wiper bracket. The output shaft of the wiper motor extends out of the lower cavity to connect to the wiper. The wiper motor drives the wiper to rotate to clean the tempered glass.

[0023] The infrared light ensures that this high-speed ball has an infrared camera function and can meet nighttime monitoring needs. The tempered glass has excellent explosion-proof performance and is not easily damaged. Due to the harsh explosion-proof environment, the tempered glass is easily dirty. The wiper can be set to clean and dust the tempered glass in time.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention arranges the second motor in the second cavity, arranges the transmission mechanism for driving the pitch rotation of the second cavity outside the second cavity, and connects the two through inner and outer transmission shafts which are nested with each other and can rotate relative to each other. The power of the second motor is transmitted to the external transmission mechanism through the inner transmission shaft, and the external transmission mechanism then transmits the power to the outer shell of the second cavity through the outer transmission shaft, so that the second cavity can rotate under the action of the second motor. Since the transmission mechanism is not loaded in the cavity, the volume and weight of the second cavity are reduced, and the second cavity is more miniaturized and lightweight. Not only the performance requirements for the second motor are reduced, but also the second cavity is more agile when pitching and rotating for shooting, the overall response speed of the equipment is increased, and the shooting quality is higher.

[0026] 2. The second motor is an electrical device. Sealing the second motor in the second cavity can prevent the current generated by the second motor from reacting with dangerous substances in the external explosive environment, making the overall explosion-proof safety of the equipment higher; the reduction transmission mechanism is partially encapsulated in the third cavity. When an explosion occurs at the explosive point in the second cavity, the reduction transmission part isolated in the third cavity will not be destroyed by the explosion. The explosion only affects a part of the equipment and does not affect other parts of the device.

[0027] 2. The reduction transmission mechanism arranged in the third cavity can reduce the speed of the second motor so that the rotation speed finally transmitted back to the second cavity meets the rotation speed requirement of the high-speed ball, which has a protective effect on the second motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a front cross-sectional view of the explosion-proof infrared high-speed ball of the present invention;

[0029] Figure 2 This is a side sectional view of the explosion-proof infrared high-speed ball of the present invention;

[0030] Figure 3 This is an enlarged structural view of the connection between the third cavity and the second cavity in the present invention;

[0031] Marked in the figure: first cavity 1, cable introduction device 11, central fixed shaft 12, first motor 13, first transmission mechanism 14, power board 15, decoder board 16, photoelectric switch bracket 17, photoelectric switch sensor sheet 18, first cavity bottom cover 19, second cavity 2, second motor 21, first pulley 22, inner transmission shaft 23, wiper motor 241, wiper motor bracket 242, wiper 243, infrared lamp 25, tempered glass 26, camera 27, front cover 281, rear cover 282, third cavity 3, fixed shaft 31, second pulley 32, third pulley 33, fourth pulley 34, tensioner 341, outer transmission shaft 35, annular protrusion 36, skeleton oil seal 37, bearing A, bearing B, inspection door 38, pressure plate 39, fourth cavity 4, cable channel 41, wall-mounted bracket 5. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] like Figure 1-3The explosion-proof infrared high-speed ball of the present invention is shown, including a first cavity 1, a second cavity 2, a third cavity 3, a fourth cavity 4 and a wall-mounted bracket 5. The upper end of the first cavity 1 is connected to the wall-mounted bracket 5. The middle part of the bottom cover of the first cavity 1 is concave. The two sides of the first cavity bottom cover 19 are connected to the second cavity 2 through the third cavity 3 and the fourth cavity 4. The third cavity 3 and the fourth cavity 4 are respectively connected to the side walls of the second cavity 2. The second cavity 2 is a cylindrical structure, and its front and rear ends are respectively fixedly connected with a front cover 281 and a rear cover 282.

[0034] The second cavity 2 is connected to the third cavity 3 by a coaxial transmission shaft, which includes an inner transmission shaft 23, an outer transmission shaft 35 and a bearing A connecting the inner transmission shaft 23 and the outer transmission shaft 35. The outer transmission shaft 35 can rotate relative to the inner transmission shaft. A second motor 21 is provided in the second cavity 2, and a reduction transmission mechanism is provided in the third cavity 3. One end of the inner transmission shaft 23 is connected to the second motor 21, and the other end is connected to the input end of the reduction transmission mechanism. The output end of the reduction transmission mechanism is connected to the outer transmission shaft 35, and the other end of the outer transmission shaft 35 is fixedly connected to the third cavity 3.

[0035] A second motor 21 and a first pulley 22 are provided in the second cavity 2, the output shaft of the second motor 21 is connected to the first pulley 22 through a synchronous belt, the core of the first pulley 22 is fixedly connected to the inner transmission shaft 23, and the other end of the inner transmission shaft 23 extends into the third cavity 3; the reduction transmission mechanism includes a fixed shaft 31, a second pulley 32, a third pulley 33, a fourth pulley 34 and a tensioner 341, a fixed shaft 31 is provided in parallel with the inner transmission shaft 23 in the third cavity 3, a second pulley 32 is sleeved on the output end of the inner transmission shaft in the third cavity 3, and a third pulley 33 is sleeved on the fixed shaft 31 A fourth pulley 34 is fixedly sleeved on the outer transmission shaft 35, the second pulley 32 is connected to the third pulley 33 by a synchronous belt, the third pulley 33 is connected to the fourth pulley 34 by another synchronous belt, and a tensioner 341 is provided on the synchronous belt between the third pulley 33 and the fourth pulley 34; an annular protrusion 36 is fixedly provided on the inner wall of the connection between the third cavity 3 and the outer transmission shaft 35, the annular protrusion 36 is connected to the outer transmission shaft 35 by a bearing B, and a skeleton oil seal 37 is also provided between the annular protrusion 36 and the outer transmission shaft 35, and the skeleton oil seal 37 seals the inside and outside of the third cavity 3.

[0036] A central fixed shaft 12 is provided in the first cavity 1, and the central fixed shaft 12 is sealed and connected to the wall-mounted bracket 5. A cable introduction device 11 is provided inside the central fixed shaft 12 for the cable to pass through. A central outer transmission shaft is provided on the outer sleeve of the central fixed shaft 12. The central fixed shaft 12 is connected to the central outer transmission shaft through a deep groove ball bearing and a thrust ball bearing, and the central outer transmission shaft is fixedly connected to the outer shell of the first cavity 1; a power supply board 15, a decoder board 16, a first motor 13 and a first transmission mechanism 14 are provided in the first cavity 1, and the power supply board 15 and the decoder board 16 are connected to the cable introduced from the outside. The first motor 13 is fixedly connected to the inner wall of the first cavity 1 through a connecting plate, and a shaft is provided adjacent to the output shaft of the first motor 13. This shaft The upper end is fixedly connected to the top surface of the first cavity, and a pulley is connected to the shaft. The lower half of the pulley is connected to the output shaft of the first motor through a synchronous belt, and the upper half of the pulley is synchronously connected to the central outer transmission shaft through another synchronous belt, and a tensioning device is also provided on the synchronous belt connecting the pulley and the central outer transmission shaft; the first motor 13 is relatively fixed to the first cavity 1, and the first motor 13 transmits power to the first transmission mechanism 14 including the shaft, pulley, tensioning device and synchronous belt. The first transmission mechanism 14 drives the central outer transmission shaft and the first cavity 1 as a whole to rotate around the central fixed axis. The first motor 13 is a stepping motor. The first motor 13 receives a pulse signal from the decoder board 16 and executes the rotation angle according to the signal.

[0037] A photoelectric switch bracket 17 and a photoelectric switch sensor sheet 18 are also provided in the first cavity 1. The photoelectric switch sensor sheet 18 is fixedly connected to the lower end of the central fixed shaft 12 and is electrically connected to the decoder board 16. The photoelectric switch bracket 17 is fixedly connected to the inner wall of the first cavity and rotates with the rotation of the first cavity 1. When the photoelectric switch bracket 17 rotates to contact the photoelectric switch sensor sheet 18, the sensor sheet transmits a signal to the decoder board 16. This angle is the initial position of the rotation. When the first motor 13 receives the signal and rotates, it rotates at a corresponding angle based on this position. The existence of the initial position makes the horizontal rotation angle more accurate and the rotation angle more controllable.

[0038] The fourth cavity 4 is arranged corresponding to the third cavity 3. The upper end of the fourth cavity 4 is sealed and connected to the bottom cover 19 of the first cavity. A cable channel 41 is provided at the connection. The cable channel 41 passes through the fourth cavity 4 and enters the second cavity 2. The cable channel 41 is used to introduce the cable in the first cavity 1 into the second cavity 2. A hollow connector with a shape similar to the outer transmission shaft 35 is provided at the connection between the fourth cavity 4 and the second cavity 2. The hollow connector is filled with sealant so that the cable entering the second cavity 2 through the hollow connector is kept isolated from the outside, and the sealing performance is better. The hollow connector is fixedly connected to the second cavity 2. The hollow connector is connected to the inside of the fourth cavity 4 through a bearing. The hollow connector can pitch and rotate relative to the fourth cavity 4 under the action of the bearing. A skeleton oil seal is provided at the connection between the third cavity 3 and the outer transmission shaft 35, and a skeleton oil seal is also provided at the connection between the fourth cavity 4 and the hollow connector. A clamping spring is provided inside the skeleton oil seal so that the two connections are sealed with the inside of the first and fourth cavities.

[0039] The third cavity 3 and the fourth cavity 4 are each provided with an inspection door 38 on one side away from the second cavity 2 , and the inspection door 38 is covered with a pressure plate 39 , which is connected to the third cavity 3 and the fourth cavity 4 by screws to seal the inspection door 38 .

[0040] A tempered glass 26 is sealed and inlaid on the front cover 281 of the second cavity 2. A plurality of infrared lamp holes are also provided on the front cover 281. Infrared lamps 25 are provided on the inner surface of the front cover 281 corresponding to the infrared lamp holes. A wiper 243 is provided on the outer surface of the front cover 281. A camera 27, a wiper motor 241 and a wiper motor bracket 242 are also provided in the second cavity 2. The camera 27 is fixedly installed in the second cavity 2. The wiper motor 241 is connected to the camera 27 through the wiper motor bracket 242. The output shaft of the wiper motor 241 extends out of the second cavity 2 to connect to the external wiper 243. The wiper motor 241 drives the wiper 243 to rotate to clean the tempered glass 26. The cross-section of the rear cover 282 along the axis of the second cavity 2 is arc-shaped. The first cavity bottom cover 19, which is arranged to be concave, is to cooperate with the arc-shaped rear cover 282 so that it is not blocked when rotating.

[0041] The explosion-proof infrared high-speed ball of the present invention is used for monitoring explosion-proof environment. In the device, all joint surfaces with possible mutual penetration with the external environment are subjected to explosion-proof treatment in accordance with standards. For all joint surfaces, the minimum length of the explosion-proof treatment is greater than 25 mm, and the maximum gap is not greater than 0.15 mm. At general explosion-proof joint surfaces, sealing rings are used for internal and external sealing; for joints where cables pass through, sealing glue fillers are used to enclose the cables inside, and the sealing effect is better; for joints where some larger parts interpenetrate each other, skeleton oil seals are used for sealing. The skeleton oil seals are provided with annular springs, which can clamp and seal the parts, and the sealing effect is better than that of traditional oil seals or sealing rings.

[0042] The device can rotate 360° as a whole driven by the first motor 13 and the first transmission mechanism 14. At the same time, driven by the second motor 21, the second cavity 2 can perform ±90° pitch rotation, so that the camera 27 in the second cavity 2 can achieve panoramic shooting in an explosion-proof environment; a plurality of infrared lamps 25 are also provided on the second cavity front cover 281, and the camera 27 can perform infrared shooting in a dark environment; the second cavity 2 equipped with the camera 27 is the most important shooting front end. For the device, the second cavity 2, which has gotten rid of the bulky transmission parts, can rotate more flexibly and has higher agility when used, which is of great significance for timely capturing monitoring images.

[0043] The above are only several preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes and substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. Explosion-proof infrared high-speed ball, characterized by: It comprises a first cavity for horizontal rotation, a second cavity for pitch rotation, and a third cavity for suspending the second cavity below the first cavity; wherein a horizontal rotation mechanism is encapsulated in the first cavity, and a pitch rotation mechanism for driving the second cavity to achieve pitch rotation is also provided in the second cavity and the third cavity, the pitch rotation mechanism comprises a second motor arranged in the second cavity, a reduction transmission mechanism arranged in the third cavity, and an inner transmission shaft connected between the second motor and the reduction transmission mechanism and an outer transmission shaft connected between the reduction transmission mechanism and the second cavity, and the outer transmission shaft is rotatably connected to the outside of the inner transmission shaft, one end of the outer transmission shaft and the inner transmission shaft extends into the second cavity, and the other end extends into the third cavity; the second cavity can perform ±90° pitch rotation, so that the camera in the second cavity can achieve panoramic shooting in an explosion-proof environment; A central fixed shaft is provided in the first cavity, a photoelectric switch bracket is provided on the inner wall of the first cavity, a photoelectric switch sensing sheet is provided at the lower end of the central fixed shaft, the photoelectric switch sensing sheet is fixed, and the photoelectric switch bracket rotates with the rotation of the first cavity. When the photoelectric switch bracket rotates to contact with the photoelectric switch sensing sheet, this angle position is the rotation reference position; The other side of the second cavity is movably connected with a fourth cavity, the fourth cavity is symmetrically arranged with the third cavity, the upper end of the fourth cavity is sealedly connected with the first cavity, a cable channel is provided at the connection, and the cable channel passes through the fourth cavity and enters the second cavity; A first pulley is provided in the second cavity, the first pulley is connected to the output shaft of the second motor through a synchronous belt, and the core of the first pulley is fixedly connected to one end of the inner transmission shaft; The reduction transmission mechanism comprises a fixed shaft, a second pulley, a third pulley and a fourth pulley arranged parallel to the inner transmission shaft, the second pulley is sleeved on the output end of the inner transmission shaft, the third pulley is sleeved on the fixed shaft, the fourth pulley is fixedly sleeved on the outer transmission shaft, the second pulley is connected to the third pulley through a synchronous belt, the third pulley is connected to the fourth pulley through another synchronous belt, and a tensioner is arranged on the synchronous belt between the third pulley and the fourth pulley; An annular protrusion is fixedly provided on the inner wall of the connection between the third cavity and the external transmission shaft. The annular protrusion is rotationally connected to the external transmission shaft. A skeleton oil seal is also provided between the annular protrusion and the external transmission shaft. The skeleton oil seal seals the inside and outside of the third cavity.

2. The explosion-proof infrared high-speed ball according to claim 1, characterized in that: A wall-mounted bracket is fixedly connected to the top of the first cavity, and a cable introduction device is arranged in the central fixed axis, and the cable introduction device introduces the cable in the wall-mounted bracket into the first cavity.

3. The explosion-proof infrared high-speed ball according to claim 1, characterized in that: The third cavity and the fourth cavity are respectively provided with an inspection door, and the inspection door is provided with a pressure plate, which can completely cover the inspection door, and the pressure plate is detachably connected to the third cavity and the fourth cavity by bolts.

4. The explosion-proof infrared high-speed ball according to claim 1, characterized in that: The second cavity also includes a front cover and a rear cover respectively connected to the front and rear ends of the second cavity. The front cover is sealed with tempered glass and is also provided with a plurality of infrared lamp holes. Infrared lamps are provided on the inner surface of the front cover corresponding to the infrared lamp holes, and a wiper is provided on the outer surface of the front cover.

5. The explosion-proof infrared high-speed ball according to claim 1, characterized in that: The second cavity is also provided with a camera, a wiper motor and a wiper motor bracket. The camera is fixedly installed in the second cavity. The wiper motor is connected to the camera through the wiper bracket. The output shaft of the wiper motor extends out of the second cavity to connect with the wiper. The wiper motor drives the wiper to rotate to clean the tempered glass.

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