96 results about "Cavity wall" patented technology

The invention discloses a building component and a building structure, and relates to the technical field of buildings. Wherein a cavity is limited in the framework, and a plurality of communicating holes capable of communicating with the cavity are formed in the cavity wall of the framework; and the concrete body covers the periphery of the framework and is filled in the cavity. The excellent compression resistance of the concrete body can be used for bearing the load of a pressure area, meanwhile, restraining force can be generated on the framework, local yielding of the framework is prevented, the fireproof and anti-corrosion effects can be achieved, the framework can bear tensile force to make up for the tensile weakness of the concrete body, shear force can be borne, ductility is improved, and the service life of the concrete body is prolonged. And the bearing capacity and the stability of the building component are improved. Besides, the mechanical occlusal force between the framework and the concrete body can be increased through the communicating holes, interface slippage and cracking are effectively avoided, and the cooperative work capacity and durability of building components under long-term loads are guaranteed.

A bucket (1) for a working machine (2) is disclosed. The bucket (1) may have: a front cavity wall (14) forming an inlet (18) defining a vertical inlet plane (26); a rear cavity wall (16) opposite to the front cavity wall (14) forming an outlet (20) defining an outlet plane (28); a top cavity wall (22) extending between the front cavity wall (14) and the rear cavity wall (16) defining a horizontal top plane (23); a bottom cavity wall (24) opposite to the top cavity wall (22) defining a bottom plane (25); and two side cavity walls (29, 30). The two side cavity walls (29, 30) may also extend between the front cavity wall (14) and the rear cavity wall (16). The outlet plane (28) may be at an angle relative to the inlet plane (26), the bottom plane (25) may be at an angle relative to the top plane (23), and the outlet plane (28) is perpendicular to the bottom plane (25).

The application discloses a noise reduction ventilation cooling device and a tunnel system, and belongs to the field of tunnel ventilation and cooling devices.The tunnel system comprises the noise reduction ventilation cooling device, and the noise reduction ventilation cooling device comprises a ventilation noise reduction assembly and a cooling assembly.During ventilation, air passes through the sound-absorbing through holes of the sound-absorbing members, so that the noise generated in the ventilation process of the tunnel system is absorbed.During cooling, the sound-absorbing members on the cavity walls of the ventilation cavity can absorb the noise generated in the cooling process of the heat exchange medium of the heat exchange circuit, so that a low noise level is maintained.Further, the noise reduction ventilation cooling device integrates noise reduction, ventilation and cooling, and is equivalent to a combined device for noise reduction, ventilation and cooling.The sound-absorbing members are used to reduce noise in the ventilation process and the cooling process, so that the tunnel space occupied by the noise reduction ventilation cooling device is reduced, and the problem that the noise reduction device and the heat dissipation ventilation facility occupy a large tunnel space in the prior art is solved.

The invention provides an underground automatic ball throwing tool, a well drilling coring device and an underground automatic ball throwing method.The underground automatic ball throwing tool comprises a shell provided with an inner cavity and an underground control unit fixedly arranged on the cavity wall of the inner cavity, and the underground control unit is provided with a detection component, a control component and a driving component; the detection component is used for receiving a push-down signal or a recovery signal sent from the ground, and the control component is connected to the detection component and used for controlling the driving component to drive the ball releasing unit to execute ball releasing when the detection component detects the push-down signal or controlling the driving component to drive the ball releasing unit to recover when the detection component detects the recovery signal; the ball releasing unit is provided with a ball containing channel and a push-pull rod connected with the driving component. Based on the electric control technology, the ball throwing operation is carried out by receiving the push-down signal sent from the ground, and the automatic ball throwing device can be suitable for automatic and efficient ball throwing in the environments such as inclined shafts and horizontal wells.

The present application relates to a kind of porous metal materials.The cavity wall of the hole surrounded by is connected open hole, and the cavity wall is axial hollow structure, and the cavity wall has hole in radial direction, and the porosity of the porous metal material is uniformly distributed or gradient distribution, and the gradient distribution can be gradient change along one direction, or it can be three-dimensional gradient change, and the cavity wall radial hole is single-stage hole.The porous metal material of the present application has good mechanical properties, high three-dimensional pore connectivity, and good transfer performance.

The invention relates to the technical field of waterproof construction, in particular to a zero-carbon building roof deformation joint heat preservation structure which comprises a cover plate, a mounting rod is vertically and fixedly mounted on the lower surface of the cover plate, a plurality of air cavities are formed in the mounting rod, and a corrugated pipe is fixedly mounted on the surface of the mounting rod; the mounting rod is slidably sleeved with a plurality of sets of heat preservation components, each heat preservation component comprises two flexible heat preservation bodies slidably arranged on the mounting rod in a sleeving mode, and a mounting plate is fixedly mounted at one end of the corrugated pipe; the cavity wall of the air cavity is provided with an air vent, piston plates are vertically arranged in the air cavity in a sliding and sealing mode, the upper surface of the cover plate is provided with a penetrating opening corresponding to the sliding opening in position, a sliding rod is fixedly installed between the multiple piston plates, the sliding rod is inserted in the sliding opening in a sliding and sealing mode, and the top end of the sliding rod penetrates out of the penetrating opening. And the length of the flexible thermal insulation body can be quickly adjusted according to the size of the deformation joint to be subjected to thermal insulation treatment until the deformation joint is subjected to thermal insulation, so that the practicability is improved.

The utility model relates to the technical field of hydraulic fracturing under a mine, and discloses a deep hole fracturing separator which comprises a first separation pipe, a second separation pipe and a third separation pipe, and a containing cavity is formed in the inner side wall of one end of the first separation pipe; the clamping piece and the sliding ball are embedded in the containing cavity, and the sliding ball is movably connected into the containing cavity and is arranged opposite to the clamping piece; one end of the second separation pipe extends into one end of the first separation pipe and is opposite to the clamping piece and the sliding ball, the clamping piece can move between a first position and a second position, the first separation pipe and the second separation pipe are in interference fit with the clamping piece at the first position, and the first separation pipe and the second separation pipe are in interference fit with the clamping piece at the second position. The sliding ball selectively extrudes the clamping piece to move towards the cavity wall of the containing cavity, so that the clamping teeth are separated from the second separation pipe. In the normal working state, the clamping piece is in interference fit with the first separation pipe and the second separation pipe, and when a fault occurs in the deep hole, separation of the first separation pipe and the second separation pipe can be rapidly achieved.

The present application relates to the technical field of range hood, and discloses a switchable air inlet assembly and a range hood with the same, the switchable air inlet assembly comprises a panel, a wind collecting box, a damper plate assembly and a cleaning device, the damper plate assembly comprises a guide rail, a damper plate and a driving device, the damper plate is provided with a shielding surface and a wind guide opening, the damper plate has a first position for shielding the air inlet, a second position for the wind guide opening corresponding to the air inlet and a third position for the shielding surface facing the cleaning device on the guide rail, and the driving device drives the damper plate to move on the guide rail; compared with the prior art, the switchable air inlet assembly can close the air inlet by the damper plate when the range hood is turned off, so that the external dust can be reduced to enter the wind collecting box and the dirt can be reduced to generate on the inner cavity wall surface of the wind collecting box; when the damper plate moves to the third position, the cleaning device can clean the shielding surface, so that the appearance of the panel is clean and tidy when the damper plate moves to the first position and closes the air inlet from the user side.

The utility model relates to the technical field of lid, especially a general plastic bucket lid capable of preventing water absorption, which comprises an outer lid and an inner lid, the bottom surface of the outer lid is provided with a sealing cavity, the top surface of the sealing cavity is the inner bottom surface of the outer lid, the cavity wall of the sealing cavity is the inner side surface of the outer end, the lower part of the cavity wall of the sealing cavity is provided with an inner thread matched with the outer thread of the plastic cylinder, the inner bottom surface of the outer lid is provided with a top surface detection assembly, the upper part of the cavity wall of the sealing cavity is provided with a side surface detection assembly, and the top surface detection assembly and the side surface detection assembly are used for detecting whether water leaks or not; the inner lid is used for being connected with the plastic cylinder, the inner lid is arranged in the sealing cavity of the outer lid, the inner lid is flexibly attached to the bucket opening, and the deformation gap of the plastic bucket opening is compensated; the outer lid is provided with a screw pressing and tightening mechanism, axial sealing is formed, the water vapor invasion path is blocked, the top surface / side surface desiccant is arranged in a partitioned manner, residual water vapor is adsorbed, the humidity in the bucket is reduced, and the water vapor penetration condition can be judged through the discoloration of the top surface / side surface desiccant.

The cab mounting support is used for mounting a cab on a vehicle frame structure, the cab mounting support comprises a bevel covering plate structure, the bevel covering plate structure comprises a top covering plate and a side covering plate which are connected, the top covering plate is used for being tightly attached to a wing plate, the side covering plate is used for being tightly attached to a web plate, and the top covering plate and the wing plate are provided with top mounting holes; side wall mounting holes are formed in the side covering plates and the web plates; the support cavity structure comprises a cavity wall structure and an inner cavity, the cavity wall structure comprises a top cavity wall, and a cavity wall mounting hole used for being fixedly connected with a suspension mechanism of a cab is formed in the top cavity wall. According to the cab installation support provided by the embodiment of the invention, stable connection with the supporting beam in the intersecting direction can be provided through the bevel covering plate structure, a suspension mechanism of a cab can be arranged and connected in the vertical direction, a cross rod structure is not needed, floor space is not additionally occupied, the structure is simplified, and development is rapid; and meanwhile, an operation space is reserved in the inner cavity, so that an operator can conveniently install and operate.

The invention discloses an eccentric boring rod and cutter relieving device for machining a special-shaped cavity, relates to the technical field of boring rods, and aims to solve the technical problem that the machining efficiency is affected due to long manual debugging time of the eccentric boring rod. Comprising a first oil storage cavity used for storing hydraulic oil, a second oil storage cavity communicated with the first oil storage cavity and an eccentric wheel installed in a rotating mode, and the end of a first piston rod is fixedly connected with a flexible column used for adjusting the eccentric angle of a tool bit. The dynamic balance assembly comprises a balance cavity and a compensation cavity which protrudes outwards and is formed in the inner cavity wall of the balance cavity, the inner cavity wall of the balance cavity is fixedly connected with a separation bag used for separating the compensation cavity, and a balance weight part is arranged in the balance cavity. The device has the advantages that the eccentric angle of the tool bit can be automatically adjusted, the step of manual timing sequence debugging is omitted, the machining preparation period is greatly shortened, the dynamic balance assembly compensates unbalanced torque in real time, vibration is reduced, the machining precision is improved, and the requirement for batch and efficient machining of special-shaped cavities is met.

The utility model relates to the technical field of cavity wall structures, in particular to a cavity wall structure with a sound insulation function. The technical problems that in the prior art, due to the fact that a large number of fasteners matched with a wallboard need to be assisted in construction and installation of the damping sound insulation board, construction is complex, construction waste is much, and the construction period is long are solved. A cavity area is formed through cooperation of the interval limiting assemblies and the wallboards, the prefabricated position of the damping sound insulation board is guaranteed, no other fasteners needing to be punched are arranged on the wallboards, only after construction is completed, a decorative face wall is arranged on the wallboard on the outer side, the construction efficiency can be effectively improved, construction waste is reduced, and the construction cost is reduced. And the configuration is stable.

A cavity wall barrier for a building, suitable for placement spanning across a wall cavity of a timber framed structure to both prevent access for vermin and insects, and prevent spread of fire in the

The invention discloses a connector butt joint guiding device with a reset function, and the device comprises a mounting housing, two opposite ends of which are respectively an open end and a closed end; the conducting pipe is arranged in the mounting shell in a penetrating manner; the reset mechanism comprises a reset seat, an axial reset assembly and a radial reset assembly, the reset seat is arranged in the mounting shell, an axial retreat gap is formed between the reset seat and the closed end, the axial reset assembly is connected between the reset seat and the closed end, and the reset seat is arranged outside the conduction pipe through a movable cavity in a sleeving mode; a radial movable gap is formed between the conduction pipe and the cavity wall of the movable cavity, and the radial reset assembly is connected between the conduction pipe and the cavity wall of the movable cavity; the guide mechanism comprises a transmission part and a guide pipe, the transmission part is fixedly arranged outside the conduction pipe in a sleeving mode, the reset seat is matched with the transmission part in an abutting mode, and the guide pipe is arranged on the transmission part. According to the connector butt joint guiding device with the reset function, the problems that alignment is difficult, reset is inconvenient and the like when a quick connector is in butt joint in a narrow space are solved.

A cavity wall barrier for a building comprising a first layer of mesh material of a first lattice size, a second layer of mesh material of a second lattice superimposed on the first layer. The first lattice size is different to the second lattice size. The superimposed mesh layers form a shaped barrier having a floor and at least one side wall. The side wall has on one side, a layer of intumescent material attached thereto, and on the other side, means to secure the mesh wall to a wall of a building.

The application discloses a salt cavern cavity forming process control method for compressed air energy storage, and belongs to the technical field of compressed air energy storage.The application solves the problem that, due to dependence on artificial experience and fixed process parameters, the existing cavity forming control method is difficult to accurately control the three-dimensional form of the cavity when facing a non-homogeneous salt rock stratum, and the problem that local over-dissolution, damage to the sealing property of the cap layer of the cavity top and stress concentration of the cavity wall easily occur, affecting long-term stability.The application builds a salt cavity form dynamic inversion model based on real-time sensing of geological parameters, and combines bidirectional coupling simulation of fluid mechanics and rock mechanics to perform closed-loop adaptive optimization control on water injection displacement, dissolving agent cushion thickness and pipe lifting speed, realizes intelligent transformation of the salt cavern cavity forming process from experience driving to data model driving, improves the cavity forming precision, and significantly enhances the construction economy and operation safety of the gas storage.

The utility model relates to the technical field of cavity wall connecting structures, in particular to a cavity wall connecting node structure, which solves the technical problem that the strength of modular cavity walls in the prior art is weak after the modular cavity walls are combined, and comprises a plurality of cavity modules which can be arranged in rows or columns to form a cavity wall surface; when the cavity modules are arranged in rows, the adjacent extending ends abut against each other to form a pouring area, and the corresponding first semicircular openings form a first prefabricated pipe cavity area. When the cavity modules are arranged in rows, the adjacent second semicircular openings form a second prefabricated pipe cavity area; ribs can be prefabricated in the second prefabricated pipe cavity area; connecting pieces can be prefabricated in the first prefabricated pipe cavity area, and the prefabricated connecting pieces are used for connecting the pre-laying layer and the inner wall plate. According to the technical scheme, the prefabricated ribs and the prefabricated connecting pieces which are staggered transversely and longitudinally are provided in the arrangement in rows and columns, and the prefabricated connecting pieces can be connected with the pre-laid layer and the inner wall plate, so that a stable supporting system similar to a rib cage is integrally formed, and the structural strength is greatly improved.

The floor drain comprises a main body with a cavity channel and a cover plate, a cavity channel opening in the bottom end of the main body inclines towards one side, the cover plate used for blocking is hinged to the cavity channel opening, and a magnetic attraction mechanism is arranged between the cover plate and the cavity channel cavity wall. The design that the hinged end formed in the mounting groove in the peripheral wall of the main body is hinged to the cover plate does not enlarge the horizontal size of the main body, mounting of the floor drain is facilitated, the design that the placement groove is in butt joint with the magnetic blocks facilitates mounting of the magnetic attraction mechanism, the magnetic attraction mechanism is arranged at the hinged position, the spacing distance between the two magnetic blocks is small in the opening and closing process of the cover plate, and mounting is more convenient. The cover plate is easier to reset under the action of magnetic attraction, and the stability is improved.

The embodiment of the utility model relates to an automatic door lifting device for an isolator, which comprises a door frame piece arranged on the cavity wall of the isolator and surrounding the side wall of a door opening of the isolator; the driving assembly is arranged on the side edge, away from the door opening, of the door frame piece and connected with the door frame piece; and the door plate piece is arranged on the side, away from the cavity wall, of the driving assembly, and the door plate piece is in sliding connection with the door frame piece through the driving assembly. According to the automatic lifting door device for the isolator, smooth sliding of the driving assembly can be improved, so that the influence of deformation of the cavity wall on the driving assembly is reduced, repair is avoided, labor is saved, and the operation cost is reduced.

A wall anchor provides thermal isolation between an inner wythe and an outer wythe of a cavity wall. The wall anchor includes a structural body. A support block is about a support plate of the structural body and a connection bar block is about a connection bar of the structural body.

The loudspeaker comprises a voice diaphragm, a damper, a voice coil and a frame assembly, the frame assembly is provided with a hollow cavity and comprises an air pressure balance block integrally arranged on the wall of the cavity, one end of the air pressure balance block is provided with an outer vent hole, and the other end of the air pressure balance block is provided with an inner vent hole. An inner vent hole is formed in one end, leading to the hollow cavity of the basin stand assembly, of the air pressure balance block, the two holes are communicated with each other, and a waterproof breathable film is mounted on the outer vent hole; the basin stand assembly comprises a wiring end integrally arranged on the wall of the cavity, two wire holes are formed in the wiring end, and the basin stand assembly further comprises a U-shaped cup covering the bottom of the basin stand assembly. The basin stand assembly is arranged to be of a hollow cavity structure, the peripheral side ring of the basin stand assembly is closed, the voice diaphragm, the dustproof cap and the waterproof breathable film cover the upper end of the basin stand assembly, the U-shaped cup covers the bottom end of the basin stand assembly, and the whole basin stand assembly is in a closed state. And the risk that dust or water mist and the like are adhered to parts such as a voice diaphragm of the loudspeaker is avoided.

A ventilated cavity wall system with vertically installed cladding elements comprises structural cavity battens which exclusively provide horizontal structural support the vertically installed cladding elements in the ventilated cavity wall system. [Figure 1] 20 25 20 10 19 14 F eb 2 02 5 4 1 2 0 2 5 2 0 1 0 1 9 1 4 F e b 2 0 2 5 1 / 11 1 / 11 100 112 112 142 140 120 FRONT 118 150 120 160 129 150 120 FIG. 1 20 25 20 10 19 14 F eb 2 02 5 1 / 1 1 1 4 F e b 2 0 2 5 1 1 2 1 1 2 1 2 0 2 0 2 5 2 0 1 0 1 9 T P 1 1 8 1 5 0 1 2 0 1 6 0 F R O N T U P 1 2 9 1 5 0 1 2 0

Disclosed in the present application are a cooling system and a related apparatus. The cooling system is used for a power conversion apparatus, the power conversion apparatus comprises a protective cavity and a device to be cooled in the protective cavity, and the cooling system comprises a cold plate, wherein the cold plate is attached to a cavity wall of the protective cavity; or the protective cavity is provided with an opening, and the cold plate is connected to the opening and is in direct or indirect contact with the device to be cooled. In the cooling system provided in the present application, the cold plate of the cooling system is attached to the cavity wall of the protective cavity, and heat dissipation of the device to be cooled in the protective cavity is realized by means of cooling the cavity wall; or the protective cavity is provided with the opening, and the cold plate is in direct or indirect contact with the device to be cooled by means of the opening, such that the device to be cooled is cooled by means of the cold plate. Compared with an air cooling method, a heat dissipation capability of the power conversion apparatus is improved by using an active heat dissipation method of cooling the device to be cooled by means of the cold plate in the present application.

The utility model relates to the technical field of dust falling, and discloses a construction dust falling device which comprises a water pipe, high-pressure water is introduced into the water pipe, and a communicating hole is formed in the side wall of the water pipe; a cavity is formed in the mounting seat, the cavity is communicated with the communicating hole, and a plurality of mounting holes are formed in the cavity wall of the cavity; the liquid guide cylinders are arranged at the mounting holes in a sealed mode, the liquid guide cylinders can rotate around the axes of the corresponding mounting holes, and openings are formed in the side walls of the liquid guide cylinders; the atomizing nozzle is arranged at the opening in a sealing manner; the plugging seat is hermetically mounted at one end, away from the mounting seat, of the liquid guide cylinder. The spraying direction of the atomizing nozzles can be adjusted conveniently, and the number of the atomizing nozzles can be increased conveniently.

The utility model provides a protective device, and relates to the technical field of network security. The protection device comprises a protection shell, a cover plate, a plurality of rubber limiting columns and a plurality of protection buffering pieces. The protective shell is of a shell structure with an opening in one end and is provided with a rectangular containing cavity matched with the isolation device, and the four corners of the containing cavity are each provided with a rubber limiting column. The cover plate covers the opening end of the protective shell in a sealing mode, and in the sealing state, the inner surface of the cover plate is attached to the isolation device arranged in the containing cavity; the multiple protection buffer pieces are arranged on the cavity wall of the containing cavity and used for isolating the isolation device from the cavity wall of the containing cavity. According to the protection device, the problem that the safety instrument network isolation device arranged in the shell in the prior art is damaged due to collision or displacement of the safety instrument network isolation device in the shell under the condition that the shell is pushed over by external force is solved.

The invention relates to the technical field of marine instruments, in particular to a release device and a self-disposable full-water-depth measuring instrument comprising the same, and aims to simplify the structure of the release device and reduce the operation complexity. The release device comprises a seat body, a release assembly and a coupling part, the seat body is provided with a groove, and a first positioning hole is formed in the groove wall of the groove; the releasing assembly comprises a shell, a rotating body and a driving part, the lower portion of the shell is arranged in the groove, the rotating body and the driving part are arranged in the shell, a plurality of through holes corresponding to the first positioning holes one to one are formed in the shell, a guide groove is formed in the circumferential face of the rotating body, a second positioning hole is formed in the guide groove, and the driving part is used for driving the rotating body; the coupling part penetrates through the through hole and is elastically connected with the inner wall of the through hole or the cavity wall of the mounting cavity, and the first end of the coupling part abuts against the guide groove or extends into the second positioning hole so that the second end of the coupling part can stretch out and draw back relative to the first positioning hole. The self-disposable full-water-depth measuring instrument comprises a plurality of measuring devices and the releasing device.

The invention provides an evaporation source and an evaporation device. The evaporation source comprises a crucible, a nozzle and a shielding structure, a closed evaporation cavity is defined by the crucible, an output port is formed in the cavity wall, on one side in the first direction, of the evaporation cavity, and the nozzle corresponds to the output port; the shielding structure is arranged in the vacant cavity and located between the material storage cavity and the output port, the shielding structure is provided with a guide channel, and the shielding structure is configured to block at least part of the evaporation material, and the movement direction of the evaporation material and the first direction form an angle; and the guide channel is arranged to guide the gaseous evaporation material to be gathered to the output port. The invention relates to the technical field of evaporation equipment, and provides an evaporation source and an evaporation device which are used for optimizing the output range of an evaporation material and can realize higher n value eruption of the material, so that the pixel shadow is reduced, and the material utilization rate is improved.

The application provides a storage device and an all-terrain vehicle, and relates to the technical field of storage devices. The storage device comprises a storage body and an elastic deformation piece. The elastic deformation piece is arranged on the cavity wall of the accommodating cavity of the storage body. The elastic deformation piece is elastically deformed towards the side away from the cavity wall to clamp the article between the elastic deformation piece and the corresponding cavity wall. In this way, the article is fixed in the accommodating cavity through the elastic deformation of the elastic deformation piece, and the article is prevented from shaking in the accommodating cavity, thereby preventing the collision between the article and the cavity wall of the accommodating cavity from causing the abnormal sound of the storage device and the damage of the article. Meanwhile, the clamping effect of the elastic deformation piece and the cavity wall on the article prevents the article from being lost due to the separation of the article from the accommodating cavity, thereby improving the use experience of the user.

The invention relates to the field of brake caliper pouring equipment, in particular to a slag-shielding slow-flow pouring system and a pouring mold with the same, and the slag-shielding slow-flow pouring system comprises a pouring gate unit, an outer pouring unit and an inner pouring unit; the sprue unit is connected with the ingate unit through the ingate unit; the sprue unit comprises a sprue cup; the outer pouring unit comprises a sprue; the inner pouring unit comprises a riser and an inner pouring gate; the straight pouring gate is connected with the inner pouring gate through a dead head; the liquid inlet ends and the liquid outlet ends of the risers are distributed in a staggered manner; through cooperative use of the sprue cup, the slag-avoiding cross gate, the sprue, the slow-flow cross gate and the dead head, the kinetic energy generated when molten metal impacts the cavity wall can be well reduced, sand holes, air holes and other derivative defects are reduced, the casting cleaning workload is reduced by 30%, and the production efficiency is improved by 20%.

The utility model relates to the technical field of building construction, in particular to a ceiling screen installation device which is used for installing a ceiling screen on an indoor floor slab and comprises a first connecting structure used for connecting the ceiling screen with the indoor floor slab, the first connecting structure comprises a first connecting part and a second connecting part, the first connecting part is connected with the indoor floor slab, and the second connecting part is connected with the indoor floor slab. The second connecting part is connected with the smoke-blocking vertical wall; a cavity is formed in the first connecting part, an opening is formed in the first connecting part, and the opening is communicated with the cavity; the second connecting part comprises a connecting piece, and the connecting piece penetrates through the opening and is connected with the cavity; the connecting piece comprises a limiting part which abuts against the cavity wall of the cavity so as to prevent the connecting piece from leaving the opening. According to the utility model, the special-shaped connecting piece enters the cavity from the opening or leaves the cavity, so that the ceiling screen can be disassembled and assembled, and the ceiling screen has the advantages of simplicity and convenience in disassembly and assembly and convenience in maintenance and replacement.