156 results about "Sight glass" patented technology

The utility model relates to the technical field of observation mirrors, in particular to a water flow observation mirror and forming equipment. When the water flow observation mirror needs to be machined, the water flow observation mirror is placed on a machining table of a polishing mechanism, a first driving piece is started, the first driving piece works to drive a transmission disc to rotate, and the transmission disc drives a transmission plate to rotate; the transmission plate drives the two inclined rods to rotate, when the included angle between the two inclined rods and the transmission plate is reduced, the two inclined rods drive the two protection covers on the two mounting plates to get close to each other until the two protection covers are closed, and at the moment, the polishing mechanism is started to machine the water flow observation mirror; and through the two protective covers, chippings generated when the water flow observation mirror is machined are effectively prevented from splashing to accidentally injure workers, so that the problem that the chippings are splashed to easily injure the workers when the water flow observation mirror is machined by an existing water flow observation mirror forming device is solved.

The application relates to a steam-sealed sight glass bidirectional sterilization antibiotic stop valve and relates to the technical field of stop valves; the valve body is internally provided with a packing gland, a main valve rod and a steam pipeline in communication with the packing gland and arranged on the valve body, the steam pipeline is used for steam flow; the valve body is provided with a shunt chamber in communication with the steam pipeline, the shunt chamber is internally slidably provided with an isolation block used for plugging an opening of the shunt chamber, the isolation block is provided with a reset spring, the reset spring is telescopic along the insertion direction of the isolation block to the opening of the shunt chamber, and the reset spring is used for limiting the isolation block at the opening of the shunt chamber; the valve body is externally provided with a sterilization chamber located outside the main valve rod, the shunt chamber is provided with an auxiliary steam pipe in mutual communication with the sterilization chamber, and the sterilization chamber is provided with a discharge pipe used for discharging steam. The application can preliminarily sterilize the main valve rod, improves the utilization rate of steam in the steam pipeline, and guarantees the sterilization effect of the steam pipeline on the main valve rod.

The invention discloses a measurement method for urban planning, a lifting mechanism is arranged in a protection box, an inner threaded hole plate is movably arranged in an inner cavity of the protection box, and a measurement instrument is fixedly connected to the top of the inner threaded hole plate. According to the urban planning measurement method, a lifting mechanism, a self-cleaning mechanism, a self-reinforcing mechanism and a height control mechanism are arranged between a protection box and a measurement instrument, so that when the measurement instrument extends out to be used, the measurement instrument can be adjusted through cooperation of the lifting mechanism, the self-cleaning mechanism, the self-reinforcing mechanism and the height control mechanism; the measuring instrument can be automatically cleaned when extending out, the device can apply a reinforcing and positioning procedure by itself, the height control effect is automatically preset, the situation that the sight glass of the measuring instrument is blocked in use due to dust falling is avoided, and the automatic stabilizing effect of the device and the automatic height control effect are further enhanced.

The invention belongs to the technical field of pipeline visualization, and discloses a large-diameter low-temperature pipeline visualization device and an assembling method.The large-diameter low-temperature pipeline visualization device comprises a prefabricated vacuum heat insulation sight glass pipe section, a connecting flange, a sealing assembly and a first fastener; the prefabricated vacuum heat insulation sight glass pipe section comprises an inner-layer flow channel pipe and an outer-layer protective sleeve which are coaxially arranged, the outer-layer protective sleeve is arranged outside the inner-layer flow channel pipe in a sleeving mode, a sealed vacuum interlayer is formed between the inner-layer flow channel pipe and the outer-layer protective sleeve, and the two connecting flanges are arranged at the two ends of the inner-layer flow channel pipe respectively. The sealing assemblies are arranged between the two ends of the inner-layer flow channel pipe and the corresponding connecting flanges, and the first fastening piece is arranged on the butt joint portion of the two connecting flanges in a penetrating mode. It can be ensured that the observation window is kept clear for a long time in a deep hypothermia environment, and meanwhile the airtightness and safety of connection with a large-diameter external pipeline are effectively guaranteed.

The utility model relates to a pressure vessel sight glass with a magnetic cleaning brush, which comprises a flange and a transparent observation window arranged in the flange, and further comprises two groups of outer magnetic scrapers and inner magnetic scrapers which are respectively arranged on the inner end surface and the outer end surface of the transparent observation window, and the outer magnetic scrapers and the inner magnetic scrapers are symmetrically distributed; one end of the outer magnetic scraper is located in the center of the transparent observation window and hinged and linked with the flange, and the other end extends to the inner wall of the flange; one end of the inner magnetic scraper is located in the center of the transparent observation window and hinged to the flange, and the other end of the inner magnetic scraper extends to the inner wall of the flange. The pressure vessel sight glass with the magnetic cleaning brush has the advantages that clearer and more reliable observation effect can be provided, the cleaning structure is simplified, the cleaning efficiency is improved, and the maintenance and use cost is reduced.

The utility model discloses a window mechanism and a feeder, and belongs to the technical field of observation windows. The window mechanism comprises an observation mirror, the middle of the observation mirror is provided with an installation through hole, and the observation mirror is used for being installed on a shell of the feeder; the rotating rod comprises a holding section and a connecting section connected with the holding section, the connecting section penetrates through the mounting through hole and is rotationally connected with the inner wall of the mounting through hole, and an angle is formed between the holding section and the connecting section; the scraping arm is connected with the side, away from the holding section, of the connecting section and makes contact with the to-be-cleaned surface of the observation mirror, and the scraping arm and the holding section are located on the two sides of the observation mirror respectively. An operator stands outside the feeding machine, holds the holding section and drives the holding section to rotate, so that the rotating rod can be driven to rotate integrally, the scraping arm on the connecting section is driven to rotate, the scraping arm scrapes and sweeps the to-be-cleaned surface of the observation mirror, dirt such as condensed water vapor and coal dust on the to-be-cleaned surface of the observation mirror is cleaned, cleaning of the observation mirror is facilitated, and the service life of the observation mirror is prolonged. The cleaning process of the observation mirror is simplified, and the cleaning efficiency is improved.

The utility model relates to a polyester process tower, which comprises a tower body, a shunt pipe and a sight glass arranged on the tower body, the tower body is connected with a feeding pipe for conveying ethylene glycol to the tower body, the shunt pipe is provided with a ball valve, one end of the shunt pipe is connected with the feeding pipe, the other end of the shunt pipe is provided with a joint, and the ball valve is connected with the joint. The novel process tower has the advantages that ethylene glycol is sprayed to the sight glass through the spraying assembly, so that the effect of cleaning the sight glass is achieved, and the internal condition of the process tower can be effectively observed; therefore, an operator can accurately adjust the liquid level in the process tower, the production is more stable, and the probability of production accidents is greatly reduced.

The utility model discloses a pipeline unblocking device for an integrated denitration system, which relates to the technical field of denitration pipeline unblocking, and comprises a Roots blower, a medicament bin and a spray gun, and further comprises a material conveying pipeline which is formed by combining a plurality of steel pipes, each two sections of steel pipes are connected in a clamping manner through a locking mechanism, and the locking mechanism is used for locking the material conveying pipeline. According to the pipeline unblocking device for the integrated denitration system, the compressed air unblocking assembly and the circulating water unblocking assembly are arranged on the material conveying pipeline, when an external system displays that the pipeline is blocked, compressed air is adopted to purge the pipeline, and when the compressed air cannot be used for unblocking, circulating water is adopted to unblock; the quick-connection sight glass type spray gun connector is arranged in a hoop type connection mode, the blockage clearing condition can be observed more visually, disassembly and assembly are convenient, the maintenance time is shortened, the blockage clearing device adapts to different blockage conditions, the blockage clearing efficiency is improved, and the influence on production is reduced.

The invention discloses an efficient substrate backflow circulating conveying device for a fermentation process, and relates to the technical field of material conveying in the fermentation process. In order to solve the problems that in the fermentation process, a substrate is prone to layering and deposition, circulating conveying is unstable, and disassembling and washing are inconvenient, the efficient substrate backflow circulating conveying device is provided. The device is composed of a fermentation tank, a material pumping port, a material pumping pipeline, an emulsifying pump, a material pumping valve, a sight glass assembly, a buffer hopper, an emulsifying machine, a rotor pump, a return pipe and a delivery pipe, wherein the return pipe and the delivery pipe are connected in a split-flow mode and are controlled by an electric control cabinet in a linkage mode. Substrates are sheared and homogenized in the emulsifying machine after being sucked and are subjected to flow stabilization in the buffer hopper, then reflux circulation is achieved through the rotor pump or the substrates are sent out to the filling machine, and key connection adopts a sanitary fast-assembly structure. The uniformity in the tank can be improved, deposition and wall hanging are reduced, feeding is stable, and CIP cleaning and maintenance are facilitated.

The utility model provides a kind of oil sight glass with cleaning function belongs to oil sight glass field, it includes installation main body, equipment connecting part is provided in one end of installation main body, sight glass is installed in the other end of installation main body, the end of installation main body close to sight glass is provided with cleaning hole, cleaning assembly is installed below cleaning hole;It further includes operating lever, the end of operating lever can be passed through cleaning hole and be connected with cleaning assembly transmission, and cleaning assembly is controlled to carry out cleaning operation, to effectively remove the dirt, impurity etc. pollutant attached to the surface of sight glass.The utility model has the beneficial effect that it can clean the inner wall during the operation of oil sight glass, effectively remove the dirt, impurity etc. pollutant attached, so that operator can better monitor lubricating oil level.

The utility model relates to the technical field of condenser discloses a water chilling unit condenser visible inspection end cover, including the cover body of layout in the condenser end, is equipped with the observation port for observing the inside of condenser on the cover body, is equipped with the sight glass made of toughened glass on the observation port, and the sight glass is connected with the cover body through the flange, and forms sealed closure to the observation port. Through being equipped with the observation port on the cover body, being equipped with the sight glass on the observation port, whether the welding slag, foreign matter in the condenser after the installation is checked, and the structure situation of water chilling unit condenser in normal operation, the scale removal situation and water quality condition etc. during chemical cleaning are observed, to avoid the damage of water chilling unit.

The utility model discloses a kind of blending kettle with intelligent sight hole lamp, it is related to the technical field of blending kettle, the utility model includes the top of shell is equipped with several sight glasses, the upper end of sight glass is equipped with sight hole lamp, the upper end of shell is also provided with manhole, the edge portion of manhole is hinged with manhole cover by hinge structure;Magnetic control sensor is integrated in the circumferential edge portion of manhole, and permanent magnet assembly is embedded in the coaxial corresponding position of manhole cover inner side, touch sensor is integrated in the installation base adjacent area of sight hole lamp, the output signal end of magnetic control sensor and touch sensor is respectively accessed microcontroller, microcontroller controls the power supply loop on-off of sight hole lamp by relay drive circuit.The application is coupled with the magnetic field of magnetic control sensor and permanent magnet to realize accurate linkage with opening action, without manual intervention.Touch sensor adjacent to sight hole lamp provides intuitive operation, responds quickly, and it is convenient, low in cost, avoid the security risk of line aging or damage.

This utility model provides an automatic sight glass switching device for a silo, comprising a conveying pipe, a sight glass switching device, and a controller. The conveying pipe is located at the bottom of the silo and has a material valve. The sight glass switching device includes a rotating disk, a drive motor, and two sight glass tubes. Each sight glass tube has a window on its side wall, and the window is fitted with transparent glass. The rotating disk has two through holes, and the two sight glass tubes are vertically fixed to the rotating disk and communicate with the through holes respectively. The drive motor is located below the rotating disk and drives the rotating disk to rotate. Either sight glass tube can be connected to the bottom of the conveying pipe. The controller is connected to the drive motor. This utility model is a simple, easy-to-operate, and efficient automatic sight glass switching device for a silo that eliminates the need for machine downtime for cleaning.

The invention belongs to the technical field of silicone oil supply devices, and particularly relates to a double-tank linkage type car lamp coating silicone oil automatic supply device which comprises a large vacuum tank body and a small vacuum tank body. A pipeline assembly is fixed and communicated between the top end of the large vacuum tank body and the top end of the small vacuum tank body; one side of the top end of the large vacuum tank body is fixedly connected with a single floating ball liquid level meter, and the other side of the top end of the large vacuum tank body is provided with a silicone oil injection flange and a pipeline sealing seat I; whether the volume of injected silicone oil is full or not is observed through the first sight glass, the first pipeline sealing seat is used for connecting the first pipeline and the second pipeline, and the pneumatic baffle valve is automatically opened and filled with atmosphere or nitrogen when the silicone oil flows from the large vacuum tank to the small vacuum tank, so that the pressure of the large vacuum tank is larger than that of the small vacuum tank. And the liquid silicone oil flows into the small vacuum tank body with the small pressure intensity from the tank body with the large pressure intensity.

A jacket is sleeved on the outer side of a tank body, a water inlet and a gas outlet are fixedly communicated on the side wall of the jacket, a water outlet is fixedly communicated at the bottom of the jacket, a discharge port is fixedly communicated at the bottom of the tank body, a thermodetector II is mounted on the tank body on one side of the discharge port, and a plurality of flange connectors are arranged at the top of the tank body. Wherein one group of flange interfaces is provided with a thermodetector I, the other group of flange interfaces is provided with a heat exchanger, the other group of flange interfaces are provided with sight holes, a support frame is arranged on a central flange plate at the top of the tank body, a speed reducer is arranged above the support frame, and the input end of the speed reducer is fixedly connected with the output end of a motor. According to the utility model, the fixed blade is mounted on the central rotating gas pipe and matched with the stirring blade II obliquely mounted at the bottom, so that the vertical turbulent flow of liquid can be enhanced, the mixing efficiency is improved, and meanwhile, the stirring blade I with opposite rotating directions is arranged outside the rotating gas pipe, so that the stirring and mixing effects can be further improved while rotational flow is avoided.

The utility model provides an improved wastewater zero-discharge crystallization byproduct salt elutriation and classification device. The improved wastewater zero-discharge crystallization byproduct salt elutriation and classification device comprises a cylindrical barrel structure, namely a salt leg, which extends downwards from the bottom of an evaporation crystallizer; a transition straight pipe section is arranged between the bottom of the crystallizer and the salt leg and connected through a flange; an emptying pipe is arranged at the bottom of the salt leg, and a flushing water pipe is arranged above the emptying pipe; a plurality of elutriation liquid feeding pipes are symmetrically arranged at the same height of the lower part of the salt leg, and elutriation liquid is uniformly distributed to each pipe for feeding; a crystal mush discharging pipe is arranged at the middle lower part of the salt leg and above the elutriation liquid feeding pipe; and sight glasses are arranged on the salt legs. The device is simple in structure, remarkable in effect and low in cost, and the purity, granularity and organic impurity content of the byproduct salt can be greatly improved.

The utility model discloses a fluorine lining check valve of sight mirror, including valve body and valve core, is equipped with fluorine lining layer on the valve body inner wall, is equipped with the inlet channel, the middle cavity and the outlet channel of intercommunication in proper order in the valve body, and the valve core is movably arranged in the middle cavity, and the upper and lower both ends position of valve body corresponding middle cavity is equipped with an observation port respectively, and the observation port is installed with transparent sight mirror, the front and back both sides of middle cavity inner wall are symmetrically equipped with guide block, and the side of guide block is equipped with guide groove close to valve core, and the front and back both sides of valve core are slidably connected with the guide groove of two guide blocks respectively, and the valve core has the check position of abutting the inner end of inlet channel and the lead-through position of separating the inner end of inlet channel when being movable, and the end of guide block close to outlet channel still is equipped with the limiting boss for constituting the limiting of valve core and making valve core unable to abut the inner end of outlet channel. The utility model not only can observe the condition of valve inside at any time, but also has clear observation field, is not blocked, and greatly promotes user experience.

The present invention provides a sight glass that can suppress the accumulation of liquid in the main unit, even when the main unit is installed so that the direction perpendicular to the transparent window is the horizontal direction. [Solution] The sight glass 1 connecting two pipes has at least one transparent window 2 that allows the flow path 100 formed inside to be viewed from the outside. The sight glass 1 comprises a main body 10 in which the flow path 100 is formed inside, and a transparent member 20 attached to an opening 14 formed in the main body 10 and constituting the transparent window 2. The diameter L2 of the opening 14 is approximately the same as the diameter D1 of the inlet 11 and outlet 13 of the main body 10, or is less than or equal to the diameter D1 of the inlet 11 and outlet 13. When the main body 10 is installed so that the direction perpendicular to the transparent window 2 is the horizontal direction, the flow path 100 formed in the main body 10 has a lower end portion 120 that is formed in a straight line from the inlet 11 to the outlet 13.

The application relates to the technical field of industrial sight glasses, in particular to a flange type high-pressure sight glass. The sight glass body is internally formed with an installation cavity, the installation cavity is internally installed with a window glass assembly, the outer end of the sight glass body is installed with a compression ring for limiting the position of the window glass assembly through screws, high-pressure gaskets are arranged between the window glass assembly and the compression ring, and the side, away from the compression ring, of the window glass assembly is also provided with the high-pressure gaskets. High-pressure gaskets are arranged between the window glass assembly and an electronic endoscope and on the other side of the window glass assembly, and undertake the main sealing task; meanwhile, auxiliary sealing pieces are additionally arranged between the two sides of the window glass assembly and the high-pressure gaskets. The main and auxiliary sealing pieces are combined, can effectively cope with the coupling effect of possible slight deformation and medium corrosion under high pressure, greatly improve the sealing reliability during long-term use, and meet the strict requirement of zero leakage under super-high-pressure working conditions.

The present application relates to the technical field of shipbuilding, and particularly relates to an adjusting mechanism of a sight glass. The adjusting mechanism of the sight glass comprises a support assembly and an adjusting assembly. The support assembly comprises a front seat frame, a joint ball head and a rear bracket, the front seat frame is connected with the rear bracket, and the joint ball head is rotatably arranged in the front seat frame. The front end of the sight glass is fixedly arranged in a through hole of the joint ball head, the front seat frame can be arranged in an inner hole of a stern tube of a ship, and the position of the front seat frame relative to the inner hole can be adjusted in the up-down direction and the left-right direction. The adjusting assembly is arranged on the rear bracket, and the adjusting assembly is in transmission connection with the rear end of the sight glass to adjust the position of the rear end of the sight glass in the up-down direction and the left-right direction, respectively. The front end of the sight glass is mounted on the front seat frame through the joint ball head, when the adjusting assembly adjusts the rear end of the sight glass, the axis of the front end of the sight glass will not be deviated, the number of adjustment operations of the sight glass is simplified, the adjustment time is shortened, and the adjustment efficiency and the adjustment accuracy are improved.

Disclosed in the present utility model is an explosion-proof sight glass lamp, comprising: a housing, a front end cover assembly, an LED lamp assembly, a radial fin heat sink, a mounting plate, a circuit board, a wiring terminal, a delay controller, a rear end cover assembly, a cable connector, a button and a support assembly; the housing has an accommodating space; the front end cover assembly is mounted on the housing; the LED lamp assembly is mounted on the radial fin heat sink; the mounting plate is mounted on the radial fin heat sink; the circuit board is mounted on the mounting plate; the wiring terminal and the delay controller are both mounted on the circuit board; the rear end cover assembly is mounted on the housing; the cable connector and the button are both mounted on the rear end cover assembly and extend into the accommodating space; the support assembly is mounted on the housing. By means of the application of the present utility model, the explosion-proof sight glass lamp is provided; the provision of the LED lamp assembly ensures the lighting effect, and heat emitted by the LED lamp assembly is discharged by means of the radial fin heat sink, thereby avoiding the phenomena of light attenuation and lamp failure, and prolonging the service life of the LED lamp assembly.

The utility model discloses a visual device for monitoring turbidity of liquid in a production pipeline, which comprises a flange pipeline, two sides of the pipeline are respectively provided with first sight glass and second sight glass, the two sight glass are fixed with the flange pipeline through a first connecting piece and a second connecting piece, the other side of the first connecting piece is fixedly connected with a camera side shell, and the other side of the second connecting piece is fixedly connected with a camera side shell. The other side of the second connecting piece is fixedly connected with the light source side shell; the bottom of the camera side shell is connected with a camera side bottom sliding plate, the camera side cooling fan is fixed on the camera side bottom sliding plate, a camera and a communication unit are fixed in the camera side shell, and a display screen connecting piece is fixed outside the camera side shell; a display screen is fixed on the display screen connecting piece; the bottom of the light source side shell is connected with a light source side bottom sliding plate, the light source side cooling fan is fixed to the light source side bottom sliding plate, and a light source and a light source controller are fixed into the light source side shell. The device is convenient to install, easy to maintain and convenient to use.

The utility model discloses an alkali-washed tail gas absorption device which comprises a tail gas pipeline, a tail gas valve is arranged on the top of the tail gas pipeline close to the edge of one end, one end of the tail gas pipeline is connected with a condenser, and the center line of the bottom of the condenser is communicated with a backflow pipeline. A sight glass is embedded in the center of the front surface of the backflow pipeline, a backflow valve is arranged at the position, close to the bottom of the sight glass, of the outer surface of one side of the backflow pipeline, the bottom end of the backflow pipeline is connected with a recycling tank, and the position, close to the top edge, of the outer surface of one side of the backflow pipeline communicates with a gas conveying pipe; and one end of the gas conveying pipe is connected with a filter box. According to the utility model, the gas generated after alkali washing flows through the condenser, so that material residues in the gas can be better liquefied to generate liquid, and the liquid flows back to the inside of the recovery tank through the return pipe, thereby greatly reducing the volatilization of bromoalkane, improving the efficiency and improving the environment.

The utility model discloses a projection lamp toy which comprises a first shell and a second shell which are oppositely arranged, the first shell and the second shell are connected to form a hollow cavity, a battery bin is arranged at the lower end of the first shell, a rotating disc is rotationally arranged at the upper end between the first shell and the second shell, and a projection lamp is arranged on the rotating disc. A screen sheet is detachably arranged in the turntable, various projection patterns are arranged on the screen sheet, and a mounting block is arranged on one side of the screen sheet; the PC control board is arranged in the middle of the cavity and used for controlling a circuit of the whole toy; the spotlight is arranged on the second shell, is positioned on one side of the mounting block and is used for illuminating a pattern on the projection sheet; the convex sight glass is arranged at the upper end of the first shell and located on one side of the spotlight. The projection lamp toy can solve the problems that most existing projection lamp toys are single in function and lack of interactivity and interestingness.

The invention relates to the technical field of white carbon black moisture detection, and discloses a near-infrared light-based moisture detection device for white carbon black production, which comprises a blanking pipe mounted below a material rotary valve, a sight glass pipeline is mounted on the surface of the blanking pipe, high borosilicate tempered glass is mounted on the sight glass pipeline, and a near-infrared light source is mounted on the high borosilicate tempered glass. A mounting rod, a detection mechanism and a remote transmission display mechanism are arranged on one side of the discharging pipe, and a mounting adjusting mechanism is arranged on the detection mechanism and used for mounting the detection mechanism on the mounting rod. A light source in the detection mechanism emits specific near-infrared light, the specific near-infrared light is irradiated on a white carbon black material through a light filtering rotating wheel and a reflecting mirror, part of the near-infrared light is absorbed by white carbon black, the other part of the near-infrared light is scattered and then gathered into a near-infrared sensor through a concave mirror, and the near-infrared light is matched with a remote transmission display mechanism to be connected with a DCS (Distributed Control System), so that the detection operation is realized.

The utility model discloses a ferris wheel observation mirror play teaching aid, including base, the fixed mounting support on the base, is connected the wheel disc through the pivot on the support, and the lens mounting hole is evenly set up on the wheel disc, and the lens mounting hole is all installed the lens, and the one end of pivot is connected the rotating handle. The utility model carries out the creative collocation of various types of lens and ferris wheel, and the child can switch the lens through the rotating handle, and observes and touches the lens, understands the characteristics of lens, discovers the convergence and diffusion of light under the lens, observes the magical change of object under different lenses, for example enlarges, shrinks, upside down, color change etc.

The utility model relates to a kind of chemical liquid component detection devices in the field of chemical liquid phase detection equipment, including ultrasonic detector, intelligent sight glass detector and multi-way valve;The multi-way valve includes the shell of regular hexahedron structure and the spherical inner cavity in the shell, liquid inlet and liquid outlet are respectively arranged on the upper and lower surface of the shell, the ultrasonic detector and the intelligent sight glass detector are installed with the structure of the included angle 90 ° in the side of the shell and with the spherical inner cavity being communicated. The utility model discloses chemical liquid component detection device, by integrating the liquid detection device of two different working principles of ultrasonic detector and intelligent sight glass detector on the multi-way valve of regular cubic structure, the detection precision of chemical liquid component can be significantly improved, while the deficiency of single detection instrument equipment is solved, and the application scenario is expanded.

The utility model relates to the technical field of refrigeration houses, in particular to a liquid sight glass mounting structure for a refrigeration house refrigeration pipeline system, which is reasonable in structural design, realizes detachable fixed connection of an outer convex pipe and an inner convex pipe by utilizing a fastener, and utilizes the inner side area of the inner convex pipe and the outer convex pipe to jointly clamp a lens and a support ring. The supporting ring can provide flexible support for the lens, prevent the inner side of the lens from being abraded, and guarantee the sealing performance of the inner side area at the same time; the outer side area of the inner convex pipe and the outer convex pipe are used for jointly clamping the sealing ring, so that the sealing performance of the outer side area is guaranteed; the outer side of the lens is protected through the protective cover, the probability of abrasion, dust accumulation and scratching is reduced, observation can be conducted through the lens after the lens is detached, and use is convenient. When the lens is scratched and worn due to long-term use, the split-type design facilitates quick replacement of the lens and facilitates cost reduction during later maintenance.

The utility model belongs to the technical field of boiler fire observation hole cleaning auxiliary devices, and particularly relates to a spray cleaning device for a boiler fire observation hole, which solves the technical problems in the background technology and comprises a water suction pump, a fan, a cleaning liquid tank and a spray butt joint port. A baffle is fixedly connected to a large opening of the trumpet-shaped barrel, a plurality of spraying holes are formed in the baffle, a water inlet pipe and an air inlet pipe are connected to a small opening of the trumpet-shaped barrel in a sealed mode, the other end of the water inlet pipe is connected with the cleaning fluid tank, the other end of the air inlet pipe is connected with the fan, and the water suction pump is connected to a pipeline of the water inlet pipe. The cleaning liquid tank body is filled with cleaning liquid; a whole formed by connecting the spraying butt joint, the water inlet pipe and the air inlet pipe is matched with an inlet and an outlet; the bottom of the wall of the steel pipe is provided with a drainage and exhaust port. The perspective sheet can be periodically scoured through a directional spraying mode of the spraying butt joint port, time and labor are saved, the cost is saved, and the observation definition of the perspective sheet is remarkably improved.