183results about How to "Unique design" patented technology

The invention discloses an electricity ammonia heat multi-energy conversion system adapting to offshore wind power fluctuation and a control method of the electricity ammonia heat multi-energy conversion system. The electric ammonia heat multi-energy conversion system comprises a green hydrogen preparation system, a green ammonia synthesis system, a green ammonia power generation system and a green ammonia heat supply system, the electric ammonia heat multi-energy conversion system is controlled by adopting the wind power absorption module and the power generation heat supply module. According to the invention, offshore wind power is utilized to prepare green hydrogen and synthesize green ammonia, offshore new energy consumption and medium-and-long-term storage of electric power are realized, low-cost long-distance flexible transportation of energy is realized through a liquid ammonia mode, the problem of storage and transportation of hydrogen energy is solved, and the construction investment of offshore transmission channels is reduced; energy supply diversification can be achieved through green ammonia power generation and green ammonia heat supply; meanwhile, through the unique control method, the method can effectively adapt to the strong volatility of offshore wind power, and economical and efficient preparation and diversified utilization of the green ammonia are achieved.

The present invention relates to a replaceable drill bit with symmetrical bevel positioning, comprising a drill rod and a replaceable drill tip, wherein a first positioning bevel of the drill tip and a second positioning bevel of the drill tip are arranged at the lower end of the replaceable drill tip, and are centrally symmetrical along a common axis CL, the first positioning bevel of the replaceable drill tip and the second positioning bevel of the drill tip match with two corresponding positioning bevels of a drill rod mounting structure, a first limiting surface and a second limiting surface are arranged below the first mounting surface and the second mounting surface of the replaceable drill tip, and the drill bit presents a dovetail structure which is narrow at the top and wide at the bottom, and a first fastening through hole and a second fastening through hole are arranged in the middle of a first chip removal groove of the drill tip and a second chip removal groove of the drill tip; a mounting structure for mounting the replaceable drill tip is arranged at the upper end of the drill rod, and is a semi-enclosed groove centrally symmetrical with the common axis CL, the groove has a first positioning bevel of the drill rod and a second positioning bevel of the drill rod as positioning surfaces, which match with the first positioning bevel of the drill tip and the second positioning bevel of the drill tip of the replaceable drill tip, and the replaceable drill tip is coaxial with the drill rod; a fastening screw fixes the replaceable drill tip on the drill rod.

The utility model is applicable to the technical field of heat exchanger cleaning, and provides a dredging device for a tube type heat exchanger, which comprises a shell, a dredging device and a dredging device, wherein a rotating shaft is rotationally mounted on the inner wall of the shell; the flexible threaded steel bar is rotationally mounted on the shell and is fixedly connected with the rotating shaft; the mounting column is fixedly mounted at one end of the flexible threaded steel bar; the slot is formed in the mounting column; the drill bit is arranged on the mounting column; the inserting block is fixedly arranged on the drill bit and is matched with the inserting groove; and the driving mechanism is arranged on the inner wall of the shell and used for driving the rotating shaft and the flexible threaded steel bars to rotate. According to the dredging device for the tubular heat exchanger, provided by the scheme, the scraped furfural cokes can be discharged in real time while the furfural cokes on the inner walls of the high-temperature side tubes are dredged, the dredging effect is good, the dredging efficiency is high, and the drill bit is convenient to replace.

The invention relates to the technical field of earthquake simulation platforms, and discloses an earthquake simulation platform monitoring device for an engineering structure, and the device comprises an earthquake simulation platform which is installed on the top surface of a bottom plate; the mounting frame is fixed on the bottom plate, and the mounting frame is of a U-shaped structure; the electric hoist is mounted at the top of the mounting frame; the counterweight structure is arranged above the earthquake simulation platform, the counterweight structure comprises a counterweight water tank, the top surface of the counterweight water tank is connected with four branch slings, and the driving end of the electric hoist is connected with a main sling. According to the load adjusting mode, a traditional weight stack adjusting method is abandoned, the adjusting mode replaces the traditional weight stack adjusting method, operation is simpler, the load adjusting requirement can be quickly responded, and the working efficiency and flexibility are improved.

The utility model discloses a land assembly type wind power tower drum foundation which comprises a reinforced concrete bottom plate and a common concrete shell. A plurality of first pre-embedded pre-stressed anchor rods are pre-embedded in the top of the reinforced concrete bottom plate in the circumferential direction, and a plurality of second pre-embedded pre-stressed anchor rods arranged in the circumferential direction are pre-embedded in the inner sides of the first pre-embedded pre-stressed anchor rods. The foundation is unique in design, reduces the use amount of the profile steel, reduces the binding work of the steel bars, has the advantages of short construction period, less on-site input labor, high construction speed and the like, and meanwhile, the profile steel part of the inner layer of the foundation can be prefabricated in a factory in a segmented manner, so that the foundation has the advantage of convenience in transportation and assembly construction processes. The use amount of reinforced concrete materials is effectively reduced, factory prefabrication of most components is achieved, a standardized assembly process is adopted for assembly on site, and the construction efficiency is improved. And integral concrete pouring is combined, so that the integral stress performance of the foundation structure is further improved.

A high-plasticity 1500MPa grade ultra-high strength steel and a manufacturing method thereof, wherein the weight percentage of the components is: C 0.35-0.40%, Si 1.0-1.8%, Mn 1.5-2.0%, Cr 0.3-0.6%, Al 0.02-0.05%, Ti 0.02-0.05%, B 0.002-0.02%, and the balance includes Fe and other inevitable impurities; and at the same time, the carbon equivalent C of the peritectic reaction zone is satisfied. eq1 >0.17%, C eq1 =C-0.03Mn-0.06Si-0.222S-0.04P; welding carbon equivalent C eq2 ≤0.56%, C eq2 =C+Mn / 20+Si / 30+2P+4S. The ultra-high strength steel of the present invention has a yield strength of 1000-1300 MPa, a tensile strength of ≥1500 MPa, an elongation at break of ≥18%, and good surface quality, and is particularly suitable for manufacturing vehicle structural parts and safety parts with complex shapes and high requirements on forming performance, such as A / B pillars, door anti-collision bars, longitudinal beams, bumpers, etc.

The utility model discloses a clinical feeding device for the senile disease department. The clinical feeding device comprises an L-shaped plate body, wherein a handle is arranged on the lower portion of the L-shaped plate body; a sliding rod body is arranged on a vertical plate of the L-shaped plate body, a C-shaped piece is arranged at the tail end of the sliding rod body, a gear motor is arranged on a transverse plate, and a gear is arranged on the gear motor; the pushing mechanism comprises a rear pushing plate, a sliding sleeve is arranged on the rear pushing plate, an omega-shaped buckle is fixedly arranged on the front portion of a sliding rod body located on the lower portion, a rack is arranged on the lower side of the sliding sleeve located on the lower portion, and the rack is matched with the gear. The injector is placed on the device, the front portion of the injector is fixed by the C-shaped piece, the whole portion of the injector is buckled by the C-shaped piece, and the pushing portion of the injector is abutted against the rear pushing plate. The fixation is firm; the stability is good; when the pushing mechanism moves, the injector is extruded, food flows out of the injector, and the old can be conveniently fed; the operation is simple, and the use is convenient.

The utility model discloses a classified storage device for medical examination specimens. The classified storage device comprises an external placing rack, wherein an external label part is arranged on the external placing rack; a classified storage mechanism is arranged on the external placement rack; the classified storage mechanism comprises a classified placement plate, the classified placement plate is placed on the external placement frame, and an internal label part is arranged on the upper side of the tail end of the classified placement plate; and a specimen classification part is arranged on the classification placement plate. The back of the arc-shaped plate is propped against a test tube of the medical examination specimen, so that the test tube of the medical examination specimen is prevented from being easily separated from the specimen placing shell; an arc-shaped plate can better extrude a test tube of a medical examination specimen, and it is guaranteed that the test tube of the medical examination specimen is fixed in a specimen containing shell; the classified placement plates are placed on an external placement frame, and placement is stable; the internal label part can be used for remarking names or other information of the specimens; the external label part can be used for remarking names or other information of the specimens; and the device has high practicability and is worthy of popularization.

The utility model discloses an ultrahigh frequency reader-writer integrating multiple functions, which relates to the technical field of ultrahigh frequency reader-writers, comprises a reader-writer and a plastic shell arranged on the surface of the reader-writer, and is characterized in that four radio frequency interfaces are arranged in the A direction of the plastic shell and are used for being connected with an ultrahigh frequency antenna according to actual requirements; an IO interface, a serial port and a USB interface amp are arranged in the B direction of the plastic shell. The ultrahigh frequency reader-writer integrating multiple functions has the advantages that the ultrahigh frequency reader-writer integrating multiple functions has multiple beneficial effects, so that the ultrahigh frequency reader-writer has high flexibility and reliability in practical application, firstly, the plastic shell is unique in design, four radio frequency interfaces are arranged in the A direction, and the ultrahigh frequency reader-writer can be connected with an ultrahigh frequency antenna according to needs; an IO interface, a serial port and a USB interface amp are respectively arranged in the B direction; according to the reader-writer, power supply communication is realized, and a communication mode can be selected through the dial switch, so that the reader-writer can adapt to different communication requirements, and the application range and the compatibility of the reader-writer are improved.

The utility model discloses a multifunctional conjoined claw hammer, which relates to the field of claw hammers, and comprises a hammer handle, the top end of the hammer handle is rotatably connected with a claw, the claw adopts a rotatable design, the hammer handle comprises a metal handle, and the outer side of the top of the metal handle is sleeved with a rubber anti-skid sleeve. The core highlight is that the claw part has the flexible characteristic of free rotation, a user can easily adjust the orientation of the claw according to actual use scenes such as nail pulling, object prying or force application angle adjustment, diversified requirements can be met without replacing tools, the rotating structure is precisely designed, it is ensured that the claw is stable and smooth during rotation, and the rotating effect is good. Meanwhile, the locking mechanism is reliable, modes can be switched rapidly, stable positioning can be achieved after the angle is selected, accidental deviation in operation is avoided, the innovative design greatly improves the applicability and operation efficiency of the tool, and a user can handle woodworking, maintaining and dismounting tasks with high proficiency.

The utility model relates to body -building equipment technical field discloses hanging piece type scissors pull back training ware, including gantry assembly, the top left side fixed connection of gantry assembly has the stand upper connecting pipe weld, the right side fixed connection of stand upper connecting pipe weld has pull arm support vertical pipe subassembly, the top front side rotationally connected with right pull arm subassembly of pull arm support vertical pipe subassembly, the top rear side rotationally connected with left pull arm subassembly of pull arm support vertical pipe subassembly. In the utility model, by placing gantry assembly on the suitable flat floor with M10 cylinder head screw connection on gantry assembly, flat washer is installed on left and right resistance arm respectively, and all screws are tightened, so that the machine design is realized unique, the modelling elegant, the training is in place, accords with the human engineering principle, and the stability is good, and three different shapes, different angle handles are welded on the pull arm respectively, greatly satisfy the demand of professional personnel.

The utility model relates to a multifunctional leisure sofa with a swinging device. The multifunctional leisure sofa comprises the swinging device and a leisure sofa body, the independently developed swing device is composed of a swing bottom frame, a swing fixed part, a swing movable part, a swing supporting part and a swing part. The structure is exquisite, the design is unique, manufacturing is easy, and safety is high. The whole multifunctional leisure sofa with the swinging device enables the leisure sofa body to swing back and forth after a consumer sits, reduces the fatigue feeling of the consumer, and is suitable for the multifunctional leisure sofa.

The invention discloses a C-shaped hollow steel keel and a keel formwork assembly structure, relates to the technical field of formwork connection, and mainly aims to improve the convenience of building formwork construction. According to the main technical scheme, the C-shaped hollowed-out steel keel comprises a keel body and a plurality of reinforcing rib plates; the keel body is provided with a groove extending in the axial direction, a plurality of openings are sequentially formed in the bottom wall of the groove, and a plurality of limiting holes are sequentially formed in the opposite side walls of the groove. And the reinforcing rib plate is fixedly connected to the radial inner edge of the groove.

The invention discloses an electronic tag hanger full-automatic packaging technology which comprises an adhesive tape packaging and bundling technology and a carton packaging technology, the adhesive tape packaging and bundling technology is carried out based on an adhesive tape packaging and bundling system, the carton packaging technology is carried out based on a carton packaging system, and the adhesive tape packaging and bundling technology at least comprises the following steps that a1, materials are taken; a2, dismantling the battery; a3, packaging and bundling with an adhesive tape; the carton packaging process at least comprises the following steps: b1, blanking; b2, overturning is carried out; and b3, carton packaging. According to the packaging technology, automatic packaging work of the electronic tag hanging frame can be completed, labor input is small, production efficiency is high, in the automatic packaging process, the battery of the electronic tag hanging frame can be pulled out, the electronic tag hanging frame is not in a power-on state, a circuit structure is effectively protected, the adhesive tape winding function can be achieved, and production efficiency is improved. And the disassembled battery is fixed with the rack body of the electronic tag hanging rack, so that the battery is effectively prevented from falling off or shifting to cause abnormity, and the packaging process also has the advantage of high packaging quality.

The utility model discloses a multifunctional mobile phone silica gel protective sleeve, which comprises a protective sleeve main body, the protective sleeve main body comprises a peripheral wall and a bottom shell, the peripheral wall and the bottom shell correspondingly enclose to form an accommodating cavity, the outer side of the peripheral wall is provided with antiskid particles, and four corners of the outer side of the peripheral wall are provided with buffer blocks. A storage assembly and a handheld assembly are arranged on the face, away from the peripheral wall, of the bottom shell. Through the design, the mobile phone is protected from being damaged, the use convenience of the mobile phone is increased, the use experience of a user is improved, and the user can use the mobile phone more conveniently and comfortably.

The utility model discloses a wiping device for neonatal care. The wiping device comprises a handle, a clamp mechanism and a wiping block. The handle is fixedly connected with the clamp mechanism; the clamp mechanism plays a role in clamping the wiping block; a related medical worker holds the handle by hand, the wiping block is clamped by the clamp mechanism on the handle, and the wiping block wipes the skin of a newborn; related users or workers adjust the position of the upper pressing clamping part by rotating the rotating plate, so that the distance between the lower pressing clamping part and the upper pressing clamping part is controlled, and the device is suitable for wiping blocks of different sizes.

The invention provides an optical lens, equipment and system for a ground lighting lamp, and relates to the technical field of automobile spare parts, and the optical lens for the ground lighting lamp comprises a condensing lens assembly and an imaging lens assembly which are sequentially arranged from the optical axis of a light source to the projection side; the condensing lens assembly gathers the light received by the condensing lens assembly on the image forming component, and an oval focusing light spot is formed on the image forming component. Light rays are mainly concentrated and irradiated on the image forming component with the large length-width ratio through the condensing lens assembly, the utilization rate of the light rays is improved, meanwhile, the projection irradiation brightness of the image forming component with the large length-width ratio is improved, the image forming component with the large length-width ratio is made to carry out high-brightness clear projection, the projection effect is good, and the projection effect is good. And the influence on the projection quality of the large-length-width-ratio image due to symmetrical light spots appearing on the projection of the large-length-width-ratio image forming component by a conventional projection lens is avoided.

The invention discloses a suspension type multi-layer lifting spraying dust suppression device and method for an ore unloading bin of a railway dump truck, the suspension type multi-layer lifting spraying dust suppression device comprises a spraying square frame assembly formed by welding a spraying transverse pipe, a spraying vertical pipe, a reinforcing rib and an anti-buckling stop lever, the length of the spraying square frame assembly is matched with the length of the ore bin, and an electric hoist is hung on a ceiling of the ore bin. A water inlet pipe is arranged on the outer side of the middle of the spraying vertical pipe and connected with a water inlet hose through a quick-change connector, and the other end of the water inlet hose is connected with a high-pressure spraying machine. During use, the manufactured spraying square frame assembly is hung at a proper position of the center of the upper portion of an ore storage bin through an electric hoist, and during turnover, the spraying device is started to sweep raised dust through mist spraying. The device is simple in structure, easy to manufacture and install and low in cost investment, the major problem of dust pollution of ore unloading operation of the concave separation raw ore bin can be thoroughly solved, the environmental supervision requirement is met, workers are liberated from the severe working environment, and the risk that production halt and renovation are responded due to the fact that dust pollutes the environment is relieved.

The application relates to the field of high-end equipment manufacturing technology, in particular to a large-size shaft end nut locking anti-loosening structure and method. The anti-loosening structure comprises a snap ring fixed in the circumferential direction of a main shaft, a locking nut abutting against the end face of the snap ring and a limiting pin. The bottom of the limiting pin abuts against an elastic pad, and the top of the limiting pin protrudes from the end face of the snap ring. A plurality of pin holes are formed in the locking nut. When the locking nut is screwed on the main shaft close to the snap ring, the limiting pin is axially compressed and moves close to the side of the elastic pad along the groove. When the locking nut abuts against the snap ring, the limiting pin is embedded in the pin hole under the elastic force of the elastic pad, the reverse rotation of the locking nut is limited, the size of the axial pre-tightening force of the wheel hub bearing is stabilized, the bearing clearance of the wheel hub bearing is kept within the set value, the mechanical performance of the wheel hub bearing unit is improved, the service life of the wheel hub bearing unit is prolonged, and the driving safety of the automobile is improved.

The utility model discloses a plurality of point position locating crossbeam welding fixture, including component fixed clamp, the component fixed clamp includes base, and the base top is fixedly connected with mainboard through bolt, and the rear side top of mainboard is rotatably connected with the lower extreme of upper clamping seat through pin shaft, the rear side of mainboard still rotatably connected with clamping pneumatic cylinder, and the output shaft end of clamping pneumatic cylinder still rotatably connected with the rear end of upper clamping seat through pin shaft, and the action of clamping pneumatic cylinder can drive the front end opening and closing of upper clamping seat, thereby realizes the compression of crossbeam, the left side of mainboard still is equipped with movable positioning pin mounting seat through bolt, the movable positioning pin mounting seat includes first mounting plate and second mounting plate who set up mutually perpendicularly, the utility model discloses adopt the cooperative drive of multiple pneumatic cylinders, and control first, second positioning pin acts simultaneously from different directions, and accurately inserts workpiece original hole position, realizes the multiple point position cooperative positioning of complex crossbeam, and greatly improves the group precision.

The utility model relates to the technical field of production and manufacturing of non-ferrous metal alloy materials, in particular to a dust treatment device for production and manufacturing of non-ferrous metal alloy materials, which comprises a device body, the device body is provided with a connecting mechanism, and the connecting mechanism comprises a connecting assembly arranged on the outer wall of the device body. A scraping assembly is arranged on the upper section of the device body, and a screening assembly is arranged on the lower section of the device body. The screening assembly of the device is unique in design, the screening plate is driven by the connecting sliding sleeve to reciprocate up and down, dust in production of non-ferrous metal alloy materials can be efficiently screened through cooperation with the scraping plate at the bottom, the screening precision and efficiency are improved, the scraping plate can scrape off materials left on the screening plate in time when the screening plate moves, and the screening efficiency is improved. And meanwhile, the inner wall of the device can be ensured to be clean, the service life of the device is prolonged, and the maintenance cost is reduced.

This utility model relates to the field of drawer cabinet technology, and more particularly to a drawer cabinet with convenient opening and closing handles, including a back panel; it also includes an L-shaped pull plate, with outer panels symmetrically fixedly connected to the left and right ends of the back panel, a top panel and a bottom panel respectively fixedly connected between the upper and lower ends of the two outer panels and the back panel, a shelf one fixedly connected to the upper part between the two outer panels, a shelf two movably arranged at the lower part between the two outer panels, a cabinet door hinged to the front side between the two outer panels, and a drawer box movably arranged at the upper end of shelf one; this utility model achieves two opening and closing methods by setting shelf one on the upper side inside the cabinet, and a drawer box on the upper side of shelf one, and by using pull groove one and pull groove two opened on the L-shaped pull plate, the drawer cabinet drawer front combined with the ° begonia corner process, and the L-shaped pull plate shaping process, thereby achieving two opening and closing methods, allowing the drawer to be opened and closed from the top of the cabinet and the front of the cabinet, while increasing the practicality of the drawer.

The utility model relates to the technical field of distribution boxes, and discloses a distribution box with an adjustable installation partition plate, which comprises a box body, the partition plate is arranged in the box body, the partition plate is provided with a locking assembly, the locking assembly comprises symmetrically distributed box bodies, the top of each box body is provided with a bolt, and the bottom end of each bolt is connected with a clamping seat. A clamping seat is arranged in the box body, an inserting bolt is arranged at the bottom of the clamping seat, a rectangular opening is formed in the ground of the box body in a penetrating mode, positioning strips are symmetrically arranged in the box body and correspond to the box body in a one-to-one mode, and positioning holes are formed in the positioning strips. And the clamping seat and the inserting bolt cooperatively move downwards by rotating the bolt. In the process, the plug and the external rubber sleeve can be accurately inserted into the positioning hole and extruded. Meanwhile, the clamping base tightly wraps the top of the positioning strip, and stable fixing is achieved. The scheme is unique in design, the positions of the partition plates can be flexibly adjusted according to actual requirements, and therefore practicability and adaptability are improved.

The present application belongs to the technical field of thermos cups, and specifically relates to a thermos cup capable of rapid cooling, comprising a cup body with a vacuum insulation layer, a cooling portion arranged above the cup body, and a covering portion arranged above the cooling portion; the cooling portion comprises a shell and a metal cooling tube arranged in the shell; the shell is a double-layer structure, and a thread for connecting the cup body is provided at the lower part of the inner wall or the outer wall of the shell; the cooling tube is located above the thread; the cooling tube is fixedly connected to the inner wall of the shell and is communicated with the cavity between the outer wall and the inner wall; an air hole is provided on the outer wall of the shell at a position corresponding to the cooling tube; the covering device comprises a cover plate and an annular cover body fixedly arranged at the lower part of the cover plate; the cover body is provided with an adjusting member for adjusting the air intake amount of the cooling tube; the present application can not only rapidly cool down the water in the cup, but also has the same insulation effect as a commonly used vacuum thermos cup, and is easy to use, has low economic cost, and has a good prospect for popularization.

The utility model relates to the technical field of punching machine part installation, and discloses a punching machine embedded part installation structure which comprises a punching machine installation table top, a plurality of adjusting grooves are formed in the punching machine installation table top, and hole site adjusting assemblies are arranged in the adjusting grooves. The hole position adjusting assembly comprises fixed vertical plates which are oppositely distributed on the bottom surfaces of the adjusting grooves, a screw rod is arranged between the two fixed vertical plates, the screw rod is sleeved with a movable plate, the movable plate is in threaded fit with the screw rod, an adjusting seat is installed on the top surface of the movable plate, and a threaded hole is formed in the top surface of the adjusting seat. By rotating the screw rod, the screw rod acts on the movable plate, and then limiting is achieved by adjusting the adjusting groove in the base edge. Afterwards, the movable plate and the adjusting seat slide along with the screw rod, and the purpose of adjusting the hole position of the threaded hole in the adjusting seat is achieved. According to the scheme, the design is unique, wide adaptability is achieved, and the multi-hole position adjusting requirement can be met.

The utility model discloses a kind of crystallizing tank devices of automation precision temperature control, it is related to crystallizing tank technical field, specifically a kind of crystallizing tank devices of automation precision temperature control, including crystallizing tank main body, further include filter component;By setting first collecting hopper, cylinder, second collecting hopper and spiral conveying rod and the structure such as etc., the efficient filtration to impurity in crystallization is realized.Crystalline is conveyed to right side under the driving of spiral conveying rod, falls down impurity through filter screen in the process, while fixed rod on spiral conveying rod further drives crystalline to turn over, improve filtering effect.In addition, cylinder can slide left and right under the driving of second motor, further enhance the turning effect of crystal, make impurity more fully contact with filter screen, to realize more thorough filtration.Compared with prior art, the filtering efficiency of the utility model is significantly improved, can effectively remove impurity in crystallization, improve the purity of product, satisfy the demand of high-purity product production.

The utility model provides high -efficient stainless steel condensing boiler, including base, the base top is provided with boiler body, one side of boiler body is equipped with the air blower, forms the combustion chamber of airtightness in boiler body, the top of air blower is equipped with the burner, and the output end of burner is equipped with the combustion head, and the combustion head is located the above of combustion chamber, and the heat exchange device is provided with the communicating pipe in combustion chamber below one side top, and the communicating pipe is linked together with the combustion chamber, the heat exchange device is equipped with the return flue pipe in the side away from communicating pipe, and the return flue pipe output end connects the rear smoke case, and the rear smoke case is fixed on the side wall of boiler body, and the rear smoke case top is equipped with the smoke outlet, the flue gas is divided into three return, and the first return combustion head carries out heating, and the second return flue gas passes through the communicating pipe and enters the front smoke case, reaches the effect that the full heat exchange, and the flue gas releases the condensing heat in the middle lower part of heat exchange sheet, and the third return flue gas enters the rear smoke case through the return flue pipe, and forms the even airflow field in the combustion chamber, ensures the even distribution of heat.

The utility model discloses a flexible adjustable cervical vertebra sleep pillow, which comprises a pillow main body and two auxiliary support bodies, the two sides of the pillow main body are provided with mounting concave parts, the two auxiliary support bodies are detachably arranged in the mounting concave parts, and the pillow main body is provided with an afterbrain support area, a neck support area and a shoulder support area; the pillow body and the auxiliary supporting body comprise an external wrapping structure and a filling structure, the filling structure comprises a plurality of flexible supporting modules which are connected with one another, the adjacent flexible supporting modules are staggered up and down, and each flexible supporting module comprises one or more rows of wavy elastic bodies. The wave directions of the wave-shaped elastomers in the same column of the same module are the same and are distributed at intervals up and down, the wave directions of the two adjacent columns of the wave-shaped elastomers in the same module are opposite and are connected with each other, and the wave directions of the connected wave-shaped elastomers between the two adjacent flexible supporting modules are opposite. Customized fixing of comfortable sleep of a human body can be achieved, and user experience is greatly improved by means of a self-created wave-shaped space supporting structure and an autonomous pressure change adjusting means.

The utility model discloses a novel water cup with a cup cover capable of placing a straw, which belongs to the technical field of articles for daily use, and comprises a cup body and the cup cover, the cup cover is provided with a water outlet and a placing port, the water outlet is a through port, the straw can be inserted into the water outlet, and the placing port is opened downwards and is of a non-through type. The cross section of the lower end is in a trapezoid shape, and residual water in the straw can be stored. The cup cover is unique in design, the straw can be placed through the placing opening additionally formed in the cup cover, when a user opens the cup cover to pour water, the straw can be placed on the inverted cup cover, residues in the straw are effectively prevented from flowing out, the situation that the straw is randomly placed on a table and polluted is avoided, and the cup cover is cleaner and more sanitary.

The utility model provides a cable leakage-proof device, which belongs to the technical field of cable protection, and is characterized in that the cable leakage-proof device comprises an external protection shell and an internal protection shell, the external protection shell and the internal protection shell are fixedly connected through a support column, the cross section of the external protection shell is an equilateral triangle, and the cross section of the internal protection shell is an equilateral triangle. The internal protective shell is in a hollow cylindrical shape and is used for wrapping a cable, and the external protective shell, the internal protective shell and the supporting column are integrally formed; a drainage channel penetrating through the inside and the outside is arranged on the surface of the external protective shell; the external protective shell is arranged, so that the internal protective shell is prevented from being in direct contact with underground soil; by arranging the inner protective shell and the supporting columns, the cable is located in the center of the outer protective shell, and the cable is prevented from making direct contact with accumulated water; according to the utility model, electric leakage of the cable caused by corrosion of the cable due to underground moisture after the cable is buried underground can be avoided, the service life of the cable is prolonged, and the safety performance of the cable is improved.