40results about How to "Disassembly and assembly save time and effort" patented technology

The invention relates to a safe replacement device for a soil pressure sensor. The safe replacement device comprises a mounting hole formed in a shield tunneling machine shell, an inserting plate, andthe soil pressure sensor; the mounting hole communicates with an excavation cabin located in the front portion of the shield tunneling machine shell and the interior of the shield tunneling machine shell; the inserting plate is mounted in the shield tunneling machine shell and arranged at the mounting hole, the inserting plate can slide on the shield tunneling machine shell, and the mounting plate is plugged through the inserting plate by sliding the inserting plate; and the soil pressure sensor is arranged in the mounting hole in an inserted mode and detachably connected with the inserting plate. The safe replacement device has the beneficial effects that the slidable inserting plate is adopted, thus before the base and the soil pressure sensor are jointly taken down from the inserting plate, the mounting hole formed in the shield tunneling machine shell and used for accommodating the soil pressure sensor can be plugged only by sliding the inserting plate, the situation that underground mud water in the excavation cabin flows back into a shield tunneling machine is avoided, thus when the soil pressure sensor is dismounted and mounted during maintenance, the time and labor are saved, and the risk is extremely small.

The invention discloses a quick mounting and dismounting structure for filter cores of a filter. The quick mounting and dismounting structure includes an upper tray, a support cylinder and a lower tray which are connected in sequence, and also includes a plurality of filter cores fixing between the upper tray and the lower tray through filter core mounting holes arranged on the upper tray and the lower tray; the filter core mounting holes of the upper tray are each internally provided with an annular groove, and each annular groove is internally provided with an earless elastic hole baffle ring. The quick mounting and dismounting structure is low in cost, and adopts simple tools during dismounting; hand pushing is performed during mounting, no dedicated tools are required, bolts are not required to be mounted or dismounted, and mounting and dismounting save time and labor and are convenient and fast; the diameter of the earless elastic hole baffle rings is larger than the diameter of the filter core mounting holes, so that the baffle rings do not fall into the interior of the filter; two faces of each filter core mounting hole are each processed with a 60-degree chamfer, so that pulling-out and mounting-in of the filter cores are smooth, the work efficiency is greatly improved, and the labor intensity is reduced; the working surface of the upper tray is flat and smooth, the friction force is small, and reliable, smooth and steady operation of the automatic backwashing filter is ensured.

The invention discloses a mutual inductor replacement, loading and transporting auxiliary device which comprises a lifting cart and a position fine adjusting device; the lifting cart comprises a cart body, a load platform, a main scissor lifting frame and a driving mechanism for driving the lifting of the main scissor lifting frame, the lower end of the main scissor lifting frame is connected with the cart body, and the upper end is connected with the load platform; The position fine adjusting device is arranged on the top surface of the load platform and comprises a work platform, a lift platform and the like. According to the invention, the device can be used for transporting the mutual inductor and assisting the mounting and dismounting of the mutual inductor, and the device can directly transporting the mutual inductor to a switch cabinet outlet cabin and can coarsely adjust the position of the mutual inductor up and down and finely adjust the position of the mutual inductor forward, backward, left, right, up and down, the device can safely, conveniently, time-savingly and labor savingly implement the mounting, dismounting, transporting, loading and unloading work of the mutual inductor, the labor intensity is reduced, the personal safety of staffs of electrical equipment and maintenance is ensured, and the device has higher popularization and application value than before.

The invention relates to a depth meter folding support convenient to use. The depth meter folding support comprises an overturn rod and a base with a fixing hole, wherein one end of the overturn rod is connected to the base through a rotation shaft, the other end of the overturn rod is connected with a rotation sleeve, and the end portion of the rotation sleeve is provided with a fastening sleeve perpendicular to the rotation sleeve. The depth meter folding support has the advantages of being simple in structure, capable of conveniently adjusting the position of a transducer, and capable of avoiding damage caused by shallow water. The depth meter folding support is convenient to install, is fixed through a bolt only, and saves time and labor when being assembled and disassembled. The depth meter folding support can be applied to various ships and is wide in application.

The invention provides installation equipment for a municipal inspection well cover, and belongs to the technical field of municipal engineering. According to the technical scheme, the installation equipment for the municipal inspection well cover comprises a body of which the bottom is provided with travelling wheels, and the bottom of the body is provided with a rotary lifting device of which the bottom is provided with a regulating device. The installation equipment has the beneficial effect that the regulating device in the installation equipment can be used for regulating the distance between the municipal inspection well cover and an inspection well, and the XY direction regulation can be achieved within the same plane; the circumferential alignment between the municipal inspection well cover and the inspection well can be achieved through the rotary lifting device, and the lifting of the municipal inspection well cover can also be achieved; finally the municipal inspection wellcover is installed on the inspection well, and manual installation is not required; and time and labor are saved.

The invention relates to a safe replacement device for a soil pressure sensor. The safe replacement device comprises a mounting hole formed in a shield tunneling machine shell, an inserting plate, andthe soil pressure sensor; the mounting hole communicates with an excavation cabin located in the front portion of the shield tunneling machine shell and the interior of the shield tunneling machine shell; the inserting plate is mounted in the shield tunneling machine shell and arranged at the mounting hole, the inserting plate can slide on the shield tunneling machine shell, and the mounting plate is plugged through the inserting plate by sliding the inserting plate; and the soil pressure sensor is arranged in the mounting hole in an inserted mode and detachably connected with the inserting plate. The safe replacement device has the beneficial effects that the slidable inserting plate is adopted, thus before the base and the soil pressure sensor are jointly taken down from the inserting plate, the mounting hole formed in the shield tunneling machine shell and used for accommodating the soil pressure sensor can be plugged only by sliding the inserting plate, the situation that underground mud water in the excavation cabin flows back into a shield tunneling machine is avoided, thus when the soil pressure sensor is dismounted and mounted during maintenance, the time and labor are saved, and the risk is extremely small.

The invention discloses a positioning clamp, comprising a bottom plate, a strip groove is processed along the length direction of the bottom plate, a long positioning plate and a short positioning plate are installed on the bottom plate, and a clamping structure is installed in the strip groove. The clamping structure includes a clamping moving plate, a folded mounting plate, a crank, a rocker, and a positioning clamping seat. A triangular positioning groove is provided at the middle position of an end surface of the positioning clamping seat, and a corner of the triangular positioning groove An anti-skid groove is provided at the place, and an anti-skid pad is installed in the anti-skid groove. On the one hand, the present invention can satisfy the positioning of rectangular plates of different sizes and prevent movement; on the other hand, it saves time and labor in disassembly and assembly comparison.

The invention discloses a textile cloth winding and unwinding device with fixed-length measuring and cutting functions, and belongs to the technical field of textile. The textile cloth winding and unwinding device comprises a machine body, a first transmission roller, a dust sticking assembly, a crease removing and dust cleaning roller, a trigger assembly, a second transmission roller, a cutting assembly and a cloth pressing assembly, and a servo motor, a small motor and a driving motor are fixedly mounted on the outer wall of the rear side of the machine body from left to right. A crease removing and dust cleaning roller and the dust sticking assembly are installed in the device, when cloth is wound and unwound, at ordinary times, the crease removing and dust cleaning roller can be driven to rotate, the rotating crease removing and dust cleaning roller can conduct effective crease removing and dust cleaning synchronous treatment on the wound and unwound cloth, meanwhile, a dust suction fan can suck cleaned dust upwards, and dust sucked upwards can be effectively attached to dust sticking stickers of the rotating dust sticking assembly. Through the linkage design, the design is ingenious, effective crease removing treatment in the cloth winding and unwinding process is achieved, and meanwhile the dust adsorption problem in the crease removing process is solved.

The invention provides a bucket tooth, a bucket and an excavator, related to the field of engineering machinery. The bucket tooth comprises a tooth base, a tooth head and a pair of connection pins, external arc surfaces of the pair of connection pins both are provided with lug bosses, a first axle hole arranged on the tooth head is corresponding to a second axle arranged on the tooth base, two rails are arranged in the second axle hole, and accommodating areas adaptive to the lug bosses are arranged at tail ends of the rails. While assembling, the tooth head is inserted and connected on the tooth base, the pair of connection pins respectively pass through the first axle hole, stretch into the axle hole and further drive the lug bosses to enter into the accommodating areas along the rails,thus, connection between the tooth head and the tooth base is realized; and while disassembling, the connection pins are just taken off from the rails. The bucket tooth, the bucket and the excavator provided by the invention are simple in structure and convenient and easy to assemble and disassemble, and in assembling and disassembling processes, striking the connection pins with great force is not needed, so the assembling and disassembling processes are safer. The bucket tooth is used on the bucket of the engineering machinery, the bucket tooth is time-saving and labor-saving in the assembling and disassembling processes, and can improve working performance of the engineering machinery.

The invention discloses an encapsulation structure of a fresh air system. The encapsulation structure comprises a case, wherein the case comprises a casing and a top cover, the top of the casing is provided with an opening, the top cover is used for sealing the casing, and comprises a fixed cover fixedly arranged on the casing and a movable cover movably connected with the fixed cover, a fixing element used for fixing the movable cover is arranged on the casing, a fixing sheet is arranged on the casing, and is positioned under the movable cover, and the bottom of the casing is provided with an installing lug. The occupied area is small during the repair, and the mounting and the dismounting are simple.

The invention discloses a socket convenient to disassemble and assemble for comprehensive wiring. The socket comprises a shell, a shell cover, a socket main body, a clamping mechanism and wiring terminals, wherein the shell cover is installed at the top of the shell, the socket main body is installed inside the shell, the top of the shell cover is provided with a through groove matched with the socket main body, the top of the socket main body is provided with a socket hole, the wiring terminals are installed on the surface of the socket main body, and the left side and the right side of the inner wall of the shell are provided with wiring holes matched with the wiring terminals. According to the invention, the socket is provided with the clamping mechanism, a limiting rod is pulled by a pull ring to move upwards so as to separate the limiting rod from the shell cover, and a rotating block is rotated to enter a rotating groove so as to disassemble the shell cover and the shell. The assembling and disassembling steps are relatively simple, the assembly and disassembly are time-saving and labor-saving, the disassembly seat can be disassembled without a tool, the socket is not damagedin the disassembling process, and great convenience is brought to a user.

The invention provides a slide block type quick connection locking device, which can quickly disassemble equipment needing frequent disassembly in a shelter; and disassembly is quick and efficient, and saves both time and labors. The slide block type quick connection locking device comprises a lock tongue and a lock base; the lock base comprises a slide block mounting cavity; a slide block is mounted in the slide block mounting cavity; a closing end of the slide block is used for penetrating through a locking hole of the corresponding lock tongue; the lock tongue is arranged perpendicular to alock tongue insertion port of the lock base; a lock tongue mounting base is mounted at the middle part of the length direction of the lock tongue; a first guide spring for driving the lock tongue tomove far from the lock base is arranged in the lock tongue mounting base; a first button is arranged at the upper part of the slide block, and is arranged in a button vertical guide cavity of the lockbase; the lower end of the first button is connected with an inclined guide groove of the slide block through a side convex column; the inclined guide groove is inclined to the closing end from top to bottom; and a horizontal guide hole is formed in the position, far from the closing end, of the slide block.

The invention discloses a movable counterweight volleyball post. The movable counterweight volleyball post comprises a volleyball post base and a movable trolley, wherein a counterweight box is arranged at the top of the volleyball post base, a stand column is arranged at the front end of the volleyball post base, hanging rods are arranged on the outer walls of the left side and the right side of the counterweight box respectively, and a circle of annular clamping groove is formed in each hanging rod; and the movable trolley structurally comprises two side rods, the two side rods are located on the left side and the right side of the counterweight box respectively, the upper ends of the two side rods are connected through a limiting transverse rod, the limiting transverse rod is located above the volleyball post base, the lower ends of the two side rods are each fixedly provided with a mounting plate, each side rod and the corresponding mounting plate are arranged in an L shape, the lower ends of the two mounting plates are respectively and coaxially provided with a walking wheel, the opposite inner walls of the two mounting plates are respectively connected with a movable hook in a hinged mode through a first rotating shaft, and the two movable hooks are respectively hooked in the clamping grooves of the hanging rods on the left side and the right side of the counterweight box in a clamping mode. The movable counterweight volleyball post has the advantage of being convenient to use.

The invention discloses a circuit switching device and an electronic box using same. External sockets on an electrical apparatus element and a panel in the box body of the electronic box are electrically connected with each other through the circuit switching device; two rigid printed boards respectively connected with the external sockets and the electrical apparatus element in the circuit switching device are electrically connected with each other through a flexible printed board; and the flexible printed board is spliced with internal sockets fixed on the rigid printed boards through internal plugs fixed at two ends of the flexible printed board. When in use, the internal plugs and the internal sockets can be simply, conveniently and rapidly spliced and matched, so that the simple, convenient and rapid connection and assembly between the flexible printed board and the rigid printed boards can be accomplished, the electric connection between the external sockets and the electrical apparatus element can be disconnected during the process of overhaul only by pulling out the internal plugs from the internal sockets, and the recovery operation of the electronic box can be realized by plugging the internal plugs to the internal sockets again, so that the circuit switching device and the electronic box using same can realize time-saving and labor-saving assembly and disassembly between the external sockets and the electrical apparatus element.

The invention relates to the field of building decoration, and provides a wall surface fast leveling hanging installation structure which is simple in structure, convenient to construct, and labor-saving and time-saving to install and dismount, and integrated with positioning and leveling. Technical problems existing in the prior art that the wall surface leveling and hanging installation construction is troublesome, the construction period is long, the construction difficulty is large, and the construction is time-consuming and labor-consuming and the like are solved. The wall surface fast leveling hanging installation structure comprises a decoration panel fixed on the wall surface, the wall surface corresponding to the decoration panel is provided with an L-shaped hanging member, the vertical surface of the L-shaped hanging member is flatly pasted and fixed on the wall surface, the transverse surface of the L-shaped hanging member extends outwards, the outer end face of the vertical surface extends upwards and outwards to form an upper inclined leading-in clamping plate, the outer end face of the transverse surface extends downwards and inwards to form a lower inclined elastic clamping plate, the decoration panel is correspondingly provided with a hanging member mounting groove, the upper inclined leading-in clamping plate is upwards matched with and in clamp connection with a corresponding inclined groove in the upper end of the hanging member mounting groove, and the lower inclined elastic clamping plate is in clamp connection with the edge of the opening of the hanging member mounting groove elastically.

The invention relates to the technical field of sewage treatment equipment, discloses a double-row ultrafiltration membrane assembly convenient to disassemble and assemble, and aims to solve the problems that when an existing ultrafiltration membrane assembly is used, on one hand, pollutants attached to the outside are difficult to remove, the manual cleaning difficulty is high, on the other hand, quick disassembly and assembly are difficult, follow-up maintenance and part replacement are inconvenient to carry out on the existing ultrafiltration membrane assembly, and the production cost is low. Cleaning mechanisms are mounted on the front side and the rear side of the ultrafiltration membrane assembly, two limiting grooves are transversely formed in the frame body, and two inserting mechanisms which are symmetrically distributed are further mounted in the frame body. A user can conveniently remove pollutants attached to the ultrafiltration membrane assembly through the cleaning mechanism, the manual cleaning difficulty is reduced, actual use of the ultrafiltration membrane assembly is facilitated, the user can conveniently and rapidly disassemble and assemble the ultrafiltration membrane assembly through the insertion mechanism, the disassembly and assembly time of the ultrafiltration membrane assembly is shortened, and the assembly and disassembly efficiency of the ultrafiltration membrane assembly is improved. And a user can easily carry out subsequent maintenance and part replacement on the ultrafiltration membrane assembly.

The invention discloses a supporting device for an ultra-low temperature thermal decoupling turbine rotor, comprising a bearing housing support body (2), a top fixing component (5), a bottom fixing component (6), a clamping component (7) and a thermal insulation Components; the thermal insulation component is set in the casing (3); the bearing box support body is fixedly installed in the casing through the top fixing component and the bottom fixing component to limit its circumferential, horizontal, vertical and axial displacement; both sides of the casing There is a support part (31), and the support contact surface (310) of the support part is located in the same horizontal plane as the assembly contact surface of the bottom fixing component and the bearing box support body; a pair of clamping components are arranged in the casing and clamped symmetrically On both sides of the bearing box support body and limit its axial displacement. The invention can avoid the problem of thermal stress generated when the connecting parts of the compressor are operated in an ultra-low temperature environment, and can also ensure that the elevation of the shaft system of the compressor remains unchanged in different temperature fields.

The invention relates to the technical field of sterilization, in particular to an intelligent sterilization device. The intelligent sterilization device comprises a box body, wherein the periphery ofthe outer wall of the box body is fixedly connected with a mounting plate; a sliding rail is mounted on the inner wall of the box body; a blower is mounted on the inner side wall of the box body; oneside of the sliding rail is movably connected with a drawer; a heating wire is mounted on the inner wall of the drawer; a fixing plate is mounted on one side of the drawer; the outer side wall of thefixing plate is fixedly connected with a handle; a distribution box is mounted on the top of the box body; a sterilization assembly is mounted on the top of the distribution box; and a fumigation assembly is mounted on the outer side wall of the distribution box. The intelligent sterilization device is simple and practical in structure, time-saving and labor-saving when disassembled and assembled, capable of preventing bacteria breeding and avoiding peculiar smell, high in practicability and capable of meeting demands of different users.

The invention discloses a quick mounting and dismounting structure for filter cores of a filter. The quick mounting and dismounting structure includes an upper tray, a support cylinder and a lower tray which are connected in sequence, and also includes a plurality of filter cores fixing between the upper tray and the lower tray through filter core mounting holes arranged on the upper tray and the lower tray; the filter core mounting holes of the upper tray are each internally provided with an annular groove, and each annular groove is internally provided with an earless elastic hole baffle ring. The quick mounting and dismounting structure is low in cost, and adopts simple tools during dismounting; hand pushing is performed during mounting, no dedicated tools are required, bolts are not required to be mounted or dismounted, and mounting and dismounting save time and labor and are convenient and fast; the diameter of the earless elastic hole baffle rings is larger than the diameter of the filter core mounting holes, so that the baffle rings do not fall into the interior of the filter; two faces of each filter core mounting hole are each processed with a 60-degree chamfer, so that pulling-out and mounting-in of the filter cores are smooth, the work efficiency is greatly improved, and the labor intensity is reduced; the working surface of the upper tray is flat and smooth, the friction force is small, and reliable, smooth and steady operation of the automatic backwashing filter is ensured.

An automatic loading stretcher system arranged in a carriage. The stretcher system comprises a stretcher assembly (11, 12), a link mechanism and a control system. The link mechanism swings to enable the stretcher assembly (11, 12) to rotate, lift, extend out of or retract back to the carriage. The stretcher assembly (11, 12) comprises a stretcher platform (13) and a guide table (49). Stretchers (14) are detachably installed on the guide table (49). The guide table (49) can move forward and backward on the stretcher platform (11, 12). The control system comprises a programmable controller (77), an electromagnetic valve (75) and proximity switches (71, 72, 73, 74). The control system controls a cylinder (24) to drive the link mechanism to swing and controls a motor (42) to drive the guide table (49) to move forward and backward, and a plurality of automatic loading stretcher systems can be installed in the carriage. The automatic loading stretcher system has the advantages that the guide table can be automatically placed outside the carriage so that the wounded can be conveniently and safely loaded and unloaded; a stretcher fixer can fix the stretchers on the guide table conveniently; and the efficiency of transporting the wounds is improved due to the plurality of stretcher systems.

The invention discloses an easy-to-install fresh air system which comprises a shell. The shell comprises a shell body provided with an opening in the top and top covers used for sealing the shell body, the top covers include a fixed cover fixed on the shell body and a movable cover movably connected with the fixed cover, attaching lugs are arranged at the bottom of the shell body, and fixing pieces and a switch lock used for fixing the movable cover are arranged on the shell body. By the arrangement, during maintenance, area occupied is small, and timesaving and laborsaving installation is achieved.

The invention discloses a switching device of an alternating current voltage stabilizer, which is connected with alternating current and a transformer and controls the transformer to output compensation voltage to the alternating current so as to stabilize the voltage of the alternating current, and comprises: a shell provided with an accommodating groove extending along a first direction, wherein the accommodating groove is opened on the surface of the shell and is provided with a first groove wall; a wiring module which comprises a connector embedded in the first groove wall and a plurality of line banks arranged on the inner surface of the first groove wall in the first direction; an absorption module is arranged in the accommodating groove and comprises a plurality of absorption units, wherein the two ends of each absorption unit are electrically connected with the corresponding line bank and the corresponding terminal on the connector respectively; and a switch module which is detachably arranged on the opening of the accommodating groove in a covering manner, wherein connecting ports which are correspondingly and electrically connected with the line banks are formed in the position, close to the first groove wall, of the switch module. The switching device is convenient in wiring operation, convenient to disassemble and assemble and convenient to maintain.

The invention relates to the technical field of annealing kilns, and especially relates to a movable check curtain for an annealing kiln. The movable check curtain is mounted at the top of the kiln body of the annealing kiln, and comprises a curtain plate assembly and a lifting assembly for driving the curtain plate assembly to go up and down, the curtain plate assembly is located below the top ofthe kiln body, the top of the kiln body is provided with a mounting through hole for the curtain plate assembly to go through up and down, the lower end of the lifting assembly goes through the mounting through hole and is connected with the curtain plate assembly, and a sealing assembly for sealing the mounting through hole is detachably mounted in the mounting through hole. When the movable check curtain needs to be inspected and maintained, the sealing assembly can be taken out from the mounting through hole at the top of the kiln body, the curtain plate assembly can be lifted by the lifting assembly, and the curtain plate assembly is lifted from the internal of the kiln body to the outside of the kiln body by the curtain plate assembly in order to pull the movable check curtain whollyfrom the internal of the kiln body, so the movable check curtain can be repaired or replaced timely and conveniently, the hidden danger of tilting or falling of the curtain plate assembly is eliminated, production accidents are prevented, and the movable check curtain has the advantages of saving of time and labor during dismounting and mounting, and high efficiency.

The invention discloses a novel slab crystallizer, and relates to the technical field of slab crystallizers. The novel slab crystallizer comprises a fixing plate fixed to a datum, and a crystallizer fixing side is fixedly installed on the upper surface of the fixing plate; the crystallizer movable side is movably installed on the machining side of the crystallizer fixed side so that an existing four-piece type crystallizer can be transformed into a two-piece type crystallizer, and therefore the overall strength and stability are improved. The crystallizer fixed side and the crystallizer movable side are communicated through a water inlet pipe and a water outlet pipe which are bilaterally symmetrically arranged, and the left end and the right end of the crystallizer fixed side are communicated with a fixed side water inlet tank and a fixed side water outlet tank respectively to provide cooling water for the crystallizer fixed side; a movable side water inlet tank and a movable side water outlet tank are movably mounted at the left and right ends of the movable side of the crystallizer respectively to provide cooling water for the movable side of the crystallizer. The internal structure of the crystallizer water tank is integrated, so that each waterway structure in the crystallizer water tank is optimized, and the whole structure is simplified.

The invention provides a multi-angle quick locating connecting disc of a gear shaping clamp, and belongs to the technical field of locating connecting discs. The multi-angle quick locating connectingdisc of the gear shaping clamp comprises a fixed disc body, wherein a locating pipe is fixedly connected to the lower surface of the fixed disc body, and a supporting spring is fixedly connected to the inner bottom wall of the locating pipe. When the multi-angle quick locating connecting disc of the gear shaping clamp is in use, a worker can firstly sleeve the surface of a locating shaft with a second gear, rotate the second gear and adjust the angle of the second gear to enable the second gear to rotate to a proper position, and then upwards mount the second gear and sleeve the outer surfaceof an expansion sleeve with the second gear, at the moment, the worker can press a pressing plate to deform the supporting spring so as to enable a first gear to make contact with the second gear, andfinally locking is conducted through a locating bolt. The multi-angle quick locating connecting disc is easy and convenient to operate, saves time and the labor during disassembling and assembling, is accurate in locating, and can effectively improve the locating precision of the first gear and the second gear in testing, thereby improving the welding precision.

The invention discloses a high-efficiency low-carbon energy-saving heating ring, and belongs to the technical field of heating rings. The high-efficiency low-carbon energy-saving heating ring comprises a first heating ring shell body, one end of the first heating ring shell body is connected with a second heating ring shell body, and one side of the first heating ring shell body is rotationally connected with one side of the second heating ring shell body through a hinge piece. According to the high-efficiency low-carbon energy-saving heating ring, by arranging a positioning ring and infraredheating pipes, the two structures are matched with each other, a heated body inside a heating cavity can be directly heated, medium contact type heating is not needed, the heat transfer efficiency isimproved, and meanwhile by arranging an infrared reflection mechanism, the heating ring can effectively reflect infrared light outwards emitted by the infrared heating pipes and the infrared light andheat which are reflected back by the heated body back to the heated body again, so that one-way radiation heating of the heating ring is achieved, the heat utilization rate is increased, the temperature of a workshop is not too high, and compared with the prior art, the low-carbon and environment-friendly functions can be achieved.