260 results about "Bell mouth" patented technology

The utility model discloses a submarine cable center clamp falling maintenance device which is used for fixing a J-shaped pipe and a submarine cable and comprises a horn mouth clamp, an adapter flange, a metal limiter, a bending limiter and a telescopic transition joint. The horn mouth clamp is used for holding and fixing a horn mouth of the J-shaped pipe, two connecting grooves are oppositely formed in the horn mouth clamp, the two connecting grooves are matched to fix the adapter flange, the adapter flange is further connected with a plurality of metal limiters and a plurality of bending limiters, and the bending limiters are fixed with an undamaged limiter group through telescopic transition joints; the utility model is based on the maintenance device. According to the utility model, efficient underwater operation maintenance can be carried out on the damaged center clamp and the bending limiter, the submarine cable protection is enhanced, the service life of the submarine cable is prolonged, the maintenance operation difficulty is reduced, the construction steps are simplified, and the maintenance cost is greatly reduced.

The invention discloses a dip pipe for an RH vacuum refining device, which comprises an annular sleeve, a tubular partition wall and a horn mouth, the tubular partition wall is located in the middle of the annular sleeve, the axis of the tubular partition wall coincides with the axis of the annular sleeve, the upper part of the horn mouth is linked with the lower part of the tubular partition wall, and the lower part of the horn mouth is linked with the upper part of the tubular partition wall. The axis of the horn mouth coincides with the axis of the circular-tube-shaped partition wall, and the circular-tube-shaped partition wall, the horn mouth and the annular sleeve are connected through spiral warping plates which form angles with one another. The circular-tube-shaped partition wall and the inner side of the horn mouth jointly form an ascending tube of the dip tube, and the circular-tube-shaped partition wall and the annular sleeve jointly form a descending tube of the dip tube. The invention further discloses an air blowing method, the RH vacuum refining device using the dip pipe and the air blowing method, the circulation flow can be increased under the condition that the structure and the size of an existing RH vacuum refining device are not changed, and the efficiency of the RH vacuum refining device is improved.

The present invention belongs to the technical field of constant temperature and humidity air-conditioning units, and in particular to a bidirectional energy-saving constant temperature and humidity air-conditioning unit. In view of the problem in the prior art that the fan power will increase once the membrane cloth humidifier is turned on, the following scheme is proposed, including a unit cover with a square tubular structure placed horizontally as a whole, wherein the interior of the unit cover is fixed with a partition frame 1, a partition frame 2 and a sealing baffle with parallel and vertical plate surfaces, an air filter cloth is provided on the surface of the sealing baffle, and an evaporator module is provided in the middle of the partition frame 2, and the space between the partition frame 1 and the partition frame 2 is a humidification space. The present invention can not only allow the airflow to quickly pass through the bell mouth during ventilation and take away the water vapor on the surface of the water-absorbing membrane cloth 1 or the water-absorbing membrane cloth 2 on both sides, but also allow the airflow to quickly and easily pass through the gap between the two adjacent membrane cloths, avoiding the traditional need for pressurization and acceleration to pass through layers of membrane cloth, thereby greatly reducing wind resistance.

The invention belongs to the technical field of house building roof drainage, and particularly relates to a double-sleeve structure for inverted roof drainage and a construction method of the double-sleeve structure. The structure is composed of a DN100 pre-embedded sleeve, a DN50 newly-added sleeve, a connecting rib and a waterproof horn mouth. The two sleeves are concentrically welded into a whole, a top opening of the pre-buried sleeve is flush with the lowest point of a slope making layer and used for draining seepage water above a waterproof layer, and a top opening of the newly-added sleeve is higher than a finished surface and provided with a horn mouth used for collecting surface open water to form an upper-lower layered independent drainage channel. During construction, the double-sleeve assembly is synchronously pre-buried in one-time pouring concrete of the structural slab and the upturning beam, a slope making layer, a waterproof layer, a heat preservation layer and a protection layer are constructed in sequence subsequently, post drilling is not needed, and the heat preservation layer and the waterproof layer are not damaged. Hydrostatic pressure of the waterproof layer can be thoroughly eliminated, the leakage risk of the roof is remarkably reduced, and the device is simple in structure, accurate in positioning, durable, free of maintenance and suitable for newly-built and reconstructed inverted roofs.

Air horns and methods for their operation. Such an air horn includes a main body having a cavity, a base, an actuator housing, and a diaphragm housing and bell fluidically connected to the cavity and to a channel within the main body. The actuator housing has a wall, a cavity surrounded by the wall, and standoffs within the cavity that define first and second sets of gaps between pairs of the standoffs. An actuator is coupled to the actuator housing so as to have first and second rotational positions. The actuator includes a shaft received in the cavity and standoff guides that individually receive pairs of the standoffs. The standoffs and the standoff guides interact to only permit axial movement of the actuator relative to the actuator housing when the actuator is in the first and second rotational positions and not at any rotational position therebetween.

The invention belongs to the technical field of wind tunnel simulation, and particularly discloses a complex environment wind field simulation device, which comprises a test cabin, a fan system and a wind guide curtain assembly, the test cabin comprises a pressure stabilizing cabin, an inner cabin and an outer cabin, the fan system comprises a rotational flow fan, a horizontal flow fan and a vertical flow fan, and any cabin wall of the inner cabin is provided with a wind wall. An air return wall is arranged opposite to the air wall; the multiple rotational flow fans are evenly arranged in the circumferential direction of the bottom of the inner cabin at intervals. The vertical flow fans are uniformly distributed on the peripheral side walls of the pressure stabilizing cabin; a movable horn mouth is formed in the top of the inner cabin; the air guide curtain assembly is arranged in the inner cabin and comprises two groups of horizontal air channel roller shutters which are arranged in the inner cabin and can be unfolded or folded; the fan system, the horn mouth, the horizontal air channel roller shutter and the air guide curtain assembly are selectively started to form different closed wind environment modes, and simulation of a complex wind field coupled by multiple physical fields is achieved. The invention further discloses a simulation method using the complex environment wind field simulation equipment.

A bell mouth includes a circumferential wall, and a pressure changing component permeable portion arranged in the circumferential wall at a location where a separated distance from an axial fan is minimal. A fan unit includes the bell mouth, an axial fan, and a case that accommodates the axial fan and the bell mouth. The fan unit has an air layer between the circumferential wall of the bell mouth and the case.

The present invention discloses a fairlead hole structure for a double-hull bulwark, comprising a double-hull bulwark portion, a fairlead hole portion and a connecting bracket; the fairlead hole portion comprises an outer sealing plate, an intermediate cylindrical sealing plate, an inner sealing plate, an outer round steel and an inner round steel; the outer sealing plate and the inner sealing plate are both one-way curved plates with a conical bell mouth; the two ends of the outer sealing plate are respectively welded to the outer end ports of the bulwark outer plate and the intermediate cylindrical sealing plate; the two ends of the inner sealing plate are respectively welded to the inner end ports of the bulwark inner plate and the intermediate cylindrical sealing plate; the outer round steel and the inner round steel are both annular and respectively welded to the two end ports of the intermediate cylindrical sealing plate; a plurality of connecting brackets are radially arranged at equal angles around the center of the intermediate cylindrical sealing plate and are welded to the fairlead hole portion and the double-hull bulwark portion on all sides. The present invention can make the fairlead hole and the double-hull bulwark structure self-contained, can be manufactured and formed on site in one go, avoiding the problem of secondary construction, and at the same time has the advantages of high structural strength, rigidity and stability, simplicity, economy and beauty.

The invention discloses a normal-temperature and high-temperature wall surface static pressure measurement integrated assembly which comprises a static pressure measurement integrated assembly body capable of introducing normal-temperature or high-temperature airflow without causing blockage of a pressure guide pipe. The pressure guide pipe and the spherical joint are hermetically welded through the metal welding layer, and the spherical joint and the conical horn mouth of the pressure guide hole in the static pressure measuring seat form linear sealing, so that the problem that colloid melts and flows into the pressure guide pipe to cause blockage is solved when high temperature of introduced high-temperature airflow occurs.

A heat source unit (1) of an air heat pump has a housing (10), a fan (22) housed in the housing (10) and rotatable about a central axis (30), a bell mouth (32) having an opening (32), and a grille (40, 42) covering the opening (32). The grille (40, 42) comprises a plurality of longitudinal first louvers (46), where each of the first louvers (46) has an inlet portion (66) facing the fan (22), and at least the inlet portions (66) are inclined with respect to a central axis (30) of the fan (22), where the inclination angle (alpha) varies in the longitudinal direction of the respective first louvers (46).

The utility model relates to the technical field of air conditioner installation, in particular to a heating ventilation air conditioner installation structure which comprises an outer shell, an inner shell and an outer shell. The opening part of one end, arranged in the shell, of the limiting pipe is a conical horn mouth; the outer side of the conical nut is a conical surface, a threaded hole is formed in the center of the conical nut, the conical nut is divided into two parts along the axial section, the conical nut is located in the horn mouth, and opening parts at the two ends of the conical nut are conical openings; the bottom support is arranged in the shell, and the end of the bottom support is located at the conical opening; the two ends of the compression spring abut against the conical nut and the bottom support respectively. The end part of the top pressing pipe is positioned in the conical opening, far away from the bottom support, of the conical nut; the utility model has the advantages of convenient and fast installation.

According to the post-grouting steel column base and the construction method, the steel column base adopts a hollow steel pipe, and the bottom of the steel column base is made into an expanded horn mouth; grouting holes are formed in the bottoms of the steel column feet; both the grouting hole and the hand hole are provided with threads and plugs; a civil foundation connected with the steel column base is provided with a cup opening with the narrow upper portion and the wide lower portion, and anchoring steel bars are embedded in the cup opening. The steel column base is installed on site through two times of grouting, the first time of grouting is conducted from the edge of a cup opening, the cup opening on a civil engineering foundation is fully filled, and meanwhile the original open column base is changed into a closed space; after first grouting hardening, the upper steel column and the steel beam which are connected with the steel column base can be installed; the micro-expansion grouting material is poured from a grouting opening in the lower end of the steel column foot for the second time of grouting, and the hole is locked by screwing a bolt after the micro-expansion grouting material is fully grouted until the grouting material is hardened. The construction site civil engineering foundation can be independently constructed, and adjustment space is available during installation; the connection strength is higher than that of a traditional mode.

The utility model discloses a bellmouth structure of a steel pipe flexible connector, which comprises a bellmouth steel pipe, a conveying steel pipe is arranged at the rear end of the bellmouth steel pipe, a bearing platform is arranged at the joint of the bellmouth steel pipe and the conveying steel pipe, a sealing gasket is mounted at the bearing platform, and the sealing gasket is detachably connected with the bearing platform; a plurality of sealing assemblies are arranged on the inner side face of the socket steel pipe from front to back, each sealing assembly comprises an installation ring and a sealing ring, the sealing rings and the installation rings are connected together in a clamped mode, elastic supporting rings are arranged on the inner sides of the installation rings, and the elastic supporting rings are connected to the inner sides of the sealing rings in an inserted mode. The bearing platform is arranged at the joint of the socket steel pipe and the conveying steel pipe, the sealing gasket is installed on the bearing platform, the inserting steel pipe is inserted into the inner side of the socket steel pipe and then abuts against the sealing gasket, and therefore the first sealing effect is achieved; and a plurality of sealing assemblies are arranged on the inner side face of the socket steel pipe, and the sealing assemblies can well seal the socket steel pipe and the inserting steel pipe.

An outdoor unit according to the present invention comprises: a box-shaped housing in which an intake port and a blowout port are formed; and an axial flow fan that is disposed inside the housing and rotates to form airflow. The housing has a cylindrical bell mouth that constitutes the blowout port and surrounds the outer circumference of the axial flow fan. The axial flow fan is provided with: a hub that is rotationally driven and forms a rotating shaft; a plurality of blades that are formed around the hub and extend radially outward from the hub; and a cylindrical ring part that is formed in an annular shape when viewed in the axial direction of the rotating shaft and is integrally formed with each blade end at the radially outer side of the plurality of blades. In the axial flow fan, a portion on the downstream side in the direction of the air flow formed by the rotation of the axial flow fan is positioned inside the bell mouth, and a portion on the upstream side thereof is positioned outside the bell mouth, and the ring part is disposed further to the upstream side than the bell mouth inside the housing.

The utility model relates to the technical field of drainage pipes, in particular to a concrete drainage pipe with good sealing performance, which comprises a drainage pipe main body, an inserting opening is arranged on one side of the drainage pipe main body far away from a bell mouth, a second connecting ring is fixedly connected inside the inserting opening, and the second connecting ring is matched with a first connecting ring. A sliding groove is formed in the second connecting ring, a spring is sleeved with the sliding groove, a limiting rod is sleeved with the inner surface of the spring, the first connecting ring and the second connecting ring are aligned in parallel to be matched, the drainage pipe body is rotated after matching is completed, and the first connecting ring rotates in the second connecting ring; and after rotating to a designated position, the spring drives the limiting rod to limit the first connecting ring, so that connection between the drainage pipe bodies is completed, the parallelism during connection of the drainage pipe bodies is improved, the sealing assembly is more tightly attached, the sealing performance is improved, and the situation that due to connection error superposition, deviation is caused, and accumulated water falls on a slope due to gaps is avoided.

The utility model provides an ozone generator which comprises a first gas chamber, a second gas chamber, a cooling chamber, a pair of discharge unit fixing plates and a plurality of discharge units, the discharge unit fixing plates are respectively fixed between the two gas chambers and the cooling chamber, each discharge unit comprises an inner electrode, a medium tube and an outer electrode, the inner electrode is located in the medium tube, and the outer electrode is located in the medium tube. The dielectric tube is sleeved with the outer electrode, a discharge air gap is formed in the discharge unit, the two ends of the outer electrode are arranged on the discharge unit fixing plate in a penetrating mode, and at least one end of the outer electrode penetrates through the discharge unit fixing plate and extends into the corresponding air chamber; a distance is formed between the end part of the outer electrode extending towards the air chamber and the discharge unit fixing plate where the outer electrode is located, one or two end parts of the outer electrode extend towards the corresponding air chamber for a certain distance, the end part of the extended outer electrode is in a horn mouth shape, the wide mouth of the horn mouth is located in the corresponding air chamber, and the inner side of the narrow mouth of the horn mouth is round and smooth.

The utility model relates to a dust collector filter assembly which comprises a shell, a filter screen is arranged on the outer wall of the shell in a surrounding mode, a base and an air guide pipe are arranged in the shell, the top end of the air guide pipe is connected with a first gland in a pressing mode, the outer wall of the shell is connected with a second gland in a pressing mode, and the lower side of the second gland is connected with a pressing cover in a pressing mode. The top end of the crimping cover is inserted into the second gland and is fixedly connected with the second gland through a screw, the top end of the base is inserted into the air guide pipe, the top end of the air guide pipe is crimped with the first gland, the top end of the first gland is crimped with the inner wall of the shell, the base is clamped with the bottom of the shell, and the bottom end of the base is crimped with the first sealing gasket, the second sealing gasket and the sealing ring in sequence; a horn mouth is inserted into the bottom end of the shell, and a filter screen surrounds the outer wall of the shell. The dust collector filtering assembly has the advantages of being convenient to assemble, improving installation efficiency, reducing use of screws, improving filtering capacity and the like.

Arrangement of a first installation kit (1) and a second installation kit (10) for operating fittings of underground gas or liquid lines, in particular so-called valves or slide valves, wherein the first installation set (1) comprises a key rod (2), a coupling sleeve (3) in the base area of ​​the first installation set (1) for connection to a spindle of a valve or slide, a sleeve tube (4) surrounding the key rod (2), and a bell (5) surrounding the connection area of ​​the first installation set (1) and valve or slide, characterized in that the second installation set (10) comprises a key rod (11), a sleeve tube and a bell (12) which is suitable for surrounding the connection area of ​​the second installation set (10) and valve or slide, in order to bridge different installation depths, the first and the second installation set (1, 10) are installed coupled to one another, the first installation set (1) has a connecting part (6) in its end region facing away from the bell (5), the connecting part (6) of the first installation kit (1) is installed coupled to the bell (12) of the second installation kit (10), the connecting part (6) of the first installation kit (1) and the bell (12) of the second installation kit (10) form a sealed connection, and at least one circumferential seal (8) is provided in the connection area of ​​the connecting part (6) of the first installation kit (1) and the bell (12) of the second installation kit (10).

The utility model relates to a sound wave vibration deashing device of a dry mill, which is characterized in that a dust inlet and an air outlet are arranged on a shell, a filter bin communicated with the dust inlet and the air outlet is further arranged in the shell, a filter element is mounted in the filter bin to isolate the dust inlet from the air outlet, and a dust collection bin positioned below the filter element is arranged on the lower side of the filter bin. An audio generator located on the upper side of the filter element is further installed in the shell, a horn mouth of the audio generator faces the filter element and enables the filter element to vibrate through sound waves, and dust adsorbed on the lower side of the filter element is vibrated to fall into the dust collecting bin. Sound waves generated by the audio generator drive the filter element to vibrate for dust removal, and the filter element or the filter bag can be prevented from being blocked; the filter element only generates slight vibration under the action of sound waves, so that the damage to the filter element caused by pulse back-blowing dust removal and mechanical vibration dust removal can be avoided, and the filter element is long in service life, good in dust removal effect and stable in operation; the audio generator is convenient to install, does not need to damage an air channel and a seal of an original structure, and is low in production cost.

A flexible pipe joint with an anti-seismic function comprises a gland, a rubber ring and a pipe joint body, and the pipe joint body comprises a limiting connecting plate and a bellmouth. The pipe joint is of an integrated connecting structure that a bell mouth is formed in one direction from the limiting connecting plate or two bell mouths are formed in the two opposite directions respectively, an annular wall is arranged in the bell mouth and serves as a supporting point to be movably matched with the connecting pipe, and the bell mouths are arranged in the two opposite directions along the annular wall. The inner wall of the socket is expanded outwards to form a wedge-shaped swing space on the inner side and a wedge-shaped ring groove on the outer side; a wedge-shaped ring rubber ring is mounted in the wedge-shaped ring groove; during installation, the connecting pipe is inserted into the bell mouth, the annular wall serves as a supporting point to be movably matched with the connecting pipe, meanwhile, due to the wedge-shaped swing space on the inner side of the annular wall, when the connecting pipe displaces due to vibration, the connecting pipe can swing in the pipe joint, deformation or fracture of the connecting pipe is prevented, and the anti-seismic effect during pipe fitting connection is improved; and meanwhile, due to the structure of the wedge-shaped rubber ring, good sealing can be always kept. The flexible pipe joint solves the technical problem that an existing flexible pipe joint cannot effectively resist shock.

The application discloses a high-speed compressor, which comprises a high-speed compressor support and a protective shell, wherein the high-speed compressor support is fixedly connected with the protective shell, a driving space is formed by the high-speed compressor support and the protective shell, a regulating assembly is arranged on the upper portion of the side surface of the protective shell and penetrates the protective shell and extends into the driving space, and an inlet casing assembly is arranged on the side of the regulating assembly close to the high-speed compressor support. The inlet guide section is an important part of the inlet of the centrifugal compressor, which mainly functions to keep the airflow entering the compressor stable, reduce airflow turbulence, and the diameter of the air inlet pipe is usually large in the traditional design, so that the airflow is prone to turbulence when entering from the atmosphere, which influences the performance of the impeller. In order to avoid this phenomenon, the air inlet pipe is optimized and designed, and the inlet of the inlet casing is designed in a trumpet-shaped expansion mode, so that the airflow is gradually and uniformly expanded after entering.

The invention discloses a pressurizing building based on assembly type unit curtain walls and a construction method thereof. The construction method comprises the steps that a plurality of curtain walls are prefabricated, hanging pieces are installed on the inner surfaces of the unit curtain walls, bellmouths are formed in the tops of the unit curtain walls, and inserting pieces are arranged at the bottoms of the unit curtain walls; mounting a main body frame, and mounting a hanging seat on the outer surface of the main body frame; positioning steel pipes are installed, the unit curtain walls are installed above the positioning steel pipes, the hanging pieces are correspondingly hung on the hanging seats, after the positions of the unit curtain walls are finely adjusted, the inserting pieces of the unit curtain walls on the upper portion are correspondingly inserted into the bell mouths of the adjacent unit curtain walls on the lower portion, and then the hanging pieces are locked on the hanging seats; gaps between the unit curtain walls are sealed to form a curtain wall system; and roof panels are installed to obtain the pressurized building. The obtained supercharged building has excellent thermotechnical and airtight performance, extremely high structural reliability and durability and good construction adaptability and economical efficiency, and the mounting adaptability of the unit curtain wall is greatly improved through cooperation of a hanging mode and a socket mode.

The utility model relates to a quick-inserting anti-retreating connector and a vehicle suspension gas storage system. The quick-inserting anti-retreating connector comprises a connector body and a chuck. One end of the joint body is provided with a horn mouth; the chuck comprises a cone part matched with the horn mouth and a non-return unit arranged on the conical surface of the cone part. According to the utility model, the non-return unit is arranged on the conical surface of the cone part, so that when the joint body is assembled with a chuck, the air pipe is extruded to be deformed, and the air pipe is clamped.

The utility model relates to the technical field of bottom plate runner machining, and discloses a positioning device for tool bottom plate machining, which comprises an operation table, and a positioning assembly is arranged on the top end face of the operation table. According to the positioning device for tool bottom plate machining, the inner wall of the clamping frame can be matched with bottom plates of different sizes through the horn mouth, the bottom plates of different sizes can be clamped and limited, in addition, the positioning device can be self-adaptive to the bottom plates of different sizes, a certain guiding effect is achieved, even if the position has small deviation during feeding and discharging, the bottom plates can be smoothly guided to enter the correct clamping positions, and the machining efficiency is improved. The two sets of movable frames synchronously move, the bottom plate is naturally positioned with the center line as the symmetric line, symmetry in follow-up operation is easily kept, size deviation is avoided, the bottom plate is pulled and then turned over outside, the bottom plate is kept on the clamping frame all the time, the bottom plate does not need to be taken down, replaced, aligned and positioned again, and therefore it can be guaranteed that the position of the bottom plate is accurate after the bottom plate is turned over, and the clamp does not need to be frequently adjusted.

A zero-carbon emission drying room for use in a compound fertilizer production plant comprises circumferential sidewalls and a roof. The drying room is provided with horizontal partitions comprising a hard perforated plate layer, two fine filter gauze layers, and two coarse filter gauze layers. A drawer is provided on the lower level of the drying room, and a horizontal ventilation duct is provided on the upper level of the drying room. A fan is provided on the horizontal ventilation duct outside the drying room, and two-stage air filters are provided within the horizontal ventilation duct between the fan and the drying room. The horizontal ventilation duct has a downward extension, the lower end of which passes through the horizontal partition and has a bell mouth, which is opposite the drawer. A countertop is provided on the circumferential inner wall of the upper level, and a workbench is provided on the countertop. Each workbench is equipped with a drying box. A door is provided on one side wall of the drying room, and an exhaust duct is provided on the roof. A flap sealing the exhaust duct is connected to the upper side of the exhaust duct via a torsion spring. This drying room utilizes waste heat from the air compressor as a heat source, which is energy-efficient and environmentally friendly.

The utility model relates to an unloading dust suppression mechanism for a sanitation vehicle, which comprises a vehicle body, a box body arranged on the vehicle body and a lifting jack used for driving the box body to incline, and further comprises a micro-mist spraying device arranged on the inner wall of the top of the box body and used for spraying liquid into the box body; the telescopic soft cover is detachably installed at the discharging opening of the box body, a horn mouth is formed in the end, away from the box body, of the telescopic soft cover, and the telescopic soft cover can cover the ground; the exhaust fan is arranged at the top of the box body and used for exhausting air in the box body outwards, so that the interior of the box body is in a negative pressure state; the air filtering module is mounted on the exhaust fan and used for filtering air; and the locking structure is arranged between the telescopic soft cover and the box body and is used for fixing the telescopic soft cover so as to prevent the telescopic soft cover from being automatically unfolded. The dust suppression device can remarkably improve the dust suppression effect and is convenient to operate.

A fan of which the blowing efficiency can be increased, the fan including a blade and a bell mouth. The blade rotates around a rotation axis that is along a first direction. The bell mouth includes a staircase structure positioned around the blade along a first plane perpendicular to the first direction. The staircase structure surrounds an opening that spreads toward a blowing direction of the blade.

The utility model relates to the field of pipe connecting engineering, in particular to a pipe and inspection well connecting structure. Comprising a connecting pipe fitting used for being installed in an inspection well and a pipe in butt joint with the connecting pipe fitting. The pipe comprises a pipe body and a socket end fixedly arranged at one end of the pipe body, and the connecting pipe fitting comprises a spigot end and a horn mouth arranged at the end of the spigot end. The horn mouth is located in the inspection well, the spigot end is located outside the inspection well, and the socket end can be connected with the spigot end; an anti-falling groove is formed in the inner wall of the socket end, an anti-falling part is fixedly arranged on the spigot end, and the anti-falling part is used for entering the anti-falling groove to be clamped with the anti-falling groove. According to the pipe and inspection well connecting structure, a cable can conveniently penetrate through the connecting structure.

The present disclosure relates to a ceiling mounted air conditioner indoor unit (1) for a heat pump comprising a refrigerant circuit, the indoor unit comprising: a casing (2) comprising an air inlet (2a) and at least one air outlet (2b); a drain pan (3) located at a bottom portion of the casing (2) having a first rim (3a) and a second rim (3b); a heat exchanger (4) being part of the refrigerant circuit and arranged above the drain pan (3) to accumulate water dripping from the heat exchanger (3) in the drain pan (3); a fan (5) housed in the casing (2) to draw air from the air inlet (2a) and discharge it from the at least one air outlet (2b) through the heat exchanger (4); a bell mouth (6) located at the air inlet (2a) and used to direct the drawn air to the fan (5); and a refrigerant leak detection sensor (7) for detecting a refrigerant leaking from the refrigerant circuit, wherein the refrigerant leak detection sensor (7) is located between an outer surface (8) of the second rim (3b) of the drain pan (3) and an inner surface (9) of the bell mouth (6), wherein the outer surface (8) of the second rim (3b) of the drain pan (3) and the inner surface (9) of the bell mouth (6) face each other.

The utility model discloses an efficient rotary cleaning device, and belongs to the technical field of product cleaning. Comprising an inlet outer cover and a conical horn mouth, and the inlet outer cover and the conical horn mouth are arranged in a matched mode to form a cleaning cavity for containing a to-be-cleaned product; n groups of air blowing pipes which are arranged in the vertical direction are arranged on the conical horn mouth, are equidistantly arranged along the same height of the conical horn mouth, and are provided with a plurality of groups of air blowing holes; the inlet outer cover is connected with a waste residue guide outer cover, and the waste residue guide outer cover is matched with the conical horn mouth in appearance, so that waste residues blown out through the blow holes are blown to the waste residue guide outer cover and the inclined surface of the conical horn mouth and fall into the discharge port. Multi-angle cleaning is achieved by arranging a plurality of sets of air blowing pipes and a plurality of sets of air blowing openings in the conical horn mouth, the waste residue guiding outer cover and the conical horn mouth are arranged in a matched mode, all cleaned waste residues fall to the discharging opening due to the gravity effect, all the cleaned waste residues are collected, and the problem of secondary pollution to products is completely eradicated.