92results about How to "Solve difficult to disassemble" patented technology

The present invention discloses a circuit board dismounting structure. The structure comprises a mounting plate, the top of the mounting plate is provided with a circuit board body, the left side of the bottom portion of the circuit board body is fixedly connected with a first support column, the bottom portion of the first support column penetrates to the internal of the mounting plate, a movable column penetrates and is arranged at the bottom portion of the left side of the mounting plate, and the left side of the movable column is fixedly connected with a rotation disc. Through cooperation usage of the mounting plate, the circuit board body, the first support column, the movable column, the rotation disc, a handle, a spacing board, a screw, a baffle plate, a spiral block, a support, a clamping rod, a movable groove, a second support column, a fixture block and a neck, the problems are solved that the installation a current circuit board employs bolts for connection and the bolts are easy to damage after usage for a long time to cause that the circuit board is difficult to dismount, and therefore the circuit board dismounting structure is convenient to dismount and facilitates users' usage.

The invention relates to a mechanical airplane wheel disassembly and assembly device. The mechanical airplane wheel disassembly and assembly device comprises a clamping mechanism (1), a frame (2), a lead screw connecting-rod mechanism (3), a rotary shaft (4) and a lifting and overturning mechanism (5). A disassembled airplane wheel can be clamped by adjusting the clamping mechanism (1). The rotary shaft (4) can be driven to swing up and down by rotating hand wheels at the two ends of the lead screw connecting-rod mechanism (3), and thus the airplane wheel is disassembled. When the disassembled airplane wheel needs to be horizontally placed, a user just needs to adjust a hand wheel on the lifting and overturning mechanism (5). The airplane wheel disassembly and assembly device is purely mechanical, simple in structure, convenient to operate and high in practicability for airplane wheels with narrow disassembly and assembly undercarriage spaces, and the problem that an existing disassembly and assembly device cannot be used for turning airplane wheels is solved.

The invention relates to an outer-cavity-type semiconductor laser structure including a laser diode fixing sheet, a lens mounting base, a sleeve, an adjustable sleeve base, an L-shaped support, a grating fixing base, a reflector fixing base, a housing, a heat sink and a pedestal. The laser diode fixing sheet enables fixation of a laser diode and a lens mounting base with a thread structure. The lens mounting base enables coaxial arrangement of the laser diode and a straightening lens. The adjustable base is used for mounting a laser head and the fixed heat sink. The grating mounting base is used for fixing a grating and is fixed together with the L-shaped support so as to realize adjustment of the length of an outer cavity. The heat sink provides support and mounting reference for different parts of the laser. The housing and pedestal form a shielding cavity isolating the inner environment of the laser from the outer environment. The structure is reasonable in component layout and is compact and stable. The weight in reduced and the cost is lowered. Problems of structure complexity and mounting and dismounting uneasiness of an outer-cavity-type semiconductor laser is solved and the invention has significant engineering practical value.

The invention discloses a welding tool for a power module and belongs to the technical field of power module manufacturing. The welding tool comprises a copper base plate positioning tool, a copper-clad plate positioning tool and a power terminal positioning tool, wherein the copper base plate positioning tool comprises a rectangular base plate, two first baffle plates and second baffle plates andis used for positioning the copper base plate of the power module; the two first baffle plates are located at two long edges of the base plate separately; the second baffle plates are located at twoshort edges of the base plate separately; the copper-clad plate positioning tool comprises two third baffle plates which are fixed on the two first baffle plates separately; a plurality of bumps are arranged on opposite side walls of the two third baffle plates respectively; a copper-clad plate of the power module is arranged between the two third baffle plates; and the power terminal positioningtool is connected across the two second baffle plates. The welding tool has the beneficial effects that a welding tool body comprises three assemblies and is easy to assemble, and the production efficiency is improved; and the bumps are arranged on the side walls of the copper-clad plate positioning tool, and the copper-clad plate is fixed by adopting a point contact mode, so that the tool is moreconvenient to dismantle after being welded, and the problem that an adhesive substance is not easy to dismantle is solved.

The invention discloses a rapid pipeline connector. The rapid pipeline connector comprises a male connector and a lock buckle and is characterized by further comprising a female connector, wherein the male connector is a hollow structure with a top and a bottom which are communicated with each other; the male connector comprises a connection pipe, a first hose pipe connection part, an outer retainer ring and an inner retainer ring; the first hose pipe connection part is arranged at the upper end of the connection pipe; the outer retainer ring sleeves the upper middle part of the connection pipe; the inner retainer ring is located under the outer retainer ring and sleeves the middle part of the connection pipe; the lock buckle is an annular lock buckle; an annular groove is formed in the inner circumferential side wall; the female connector is a hollow structure with a top and a bottom which are communicated with each other; the female connector comprises fastening buckles, an opening structure and a second hose pipe connection part; the opening structure is located above the second hose pipe connection part; more than three fastening buckles are uniformly distributed at the periphery of the upper end of the opening structure. The rapid connector is simple in structure and convenient to use.

The present invention relates to a cylindrical lithium battery assembly tool. The cylindrical lithium battery assembly tool includes a lithium battery assembly module and two lithium battery connection modules. The two lithium battery connection modules are symmetrically installed at two ends of the lithium battery assembly module by using assembly screws, and each lithium battery connection module and the assembly screw are connected in a laser welding manner. The laser welding manner has high welding quality, and lowers a probability of faults such as short circuit and poor contact that occur after long time use of corresponding lithium battery. The lithium battery assembly module adopts a modular decentralized installation design, so that the lithium batteries can be installed rapidly no matter how many lithium batteries are assembled, and the lithium batteries are simple to assemble and disassemble; and a gap between any two adjacent lithium batteries is large, so that the heat dissipation effect is good. The lithium battery connection modules can be customized and processed according to a quantity of the lithium batteries that are assembled in a modular decentralized manner in the lithium battery assembly module, the lithium batteries can be connected once, and two lithium batteries do not need to be connected separately. Through adoption of the cylindrical lithium battery assembly tool, a modular disassembling function of a lithium battery pack can be realized.

The invention discloses an air conditioner air outlet assembly and an air conditioner provided with the same, and belongs to the field of air conditioners and accessories thereof. The air conditioner air outlet assembly is designed to solve the problem that an existing grating is difficult to assemble and disassemble. The air conditioner air outlet assembly comprises a grating, and the grating comprises a first grating body and a second grating body which are detachably connected through a connecting piece. The air conditioner comprises the air outlet assembly. The air outlet assembly solves the problem that an integral grating is difficult to disassemble after being assembled and sold, a user can assemble, disassemble and clean the grating conveniently, dust accumulation and bacterium breeding in the grating are avoided, and cleanness of indoor air is ensured. The grating of the air conditioner is convenient to assemble, disassemble and clean, it is avoided that the indoor air is polluted due to dust accumulation and bacterium breeding in the grating, and it is ensured that the air conditioner is healthier and safer to use.

The invention discloses a shock isolation device. The shock isolation device comprises an embedded part which is arranged in the vertical direction and a shock isolation assembly perpendicular to the horizontal direction. The embedded part is composed of a connecting plate and supporting columns with different diameters. The shock isolation assembly is composed of a shock isolation support and a wedge block lead screw mechanism, wherein the shock isolation support and the wedge block lead screw mechanism are arranged in sequence from bottom to top. The shock isolation support is composed of a supporting base and a shock isolation layer. The supporting base is fixedly connected with the embedded part. The wedge block lead screw mechanism comprises edge blocks, lead screws, a base plate and a lifting plate, wherein the base plate and the lifting plate are horizontally arranged. The wedge block lead screw mechanism is installed on the shock isolation support. The shock isolation device is suitable for box type electric equipment, such as a transformer and a paralleling reactor, in a transformer substation; the structural frequency of heavy electric equipment with a low gravity center can be effectively changed through the shock isolation device, so that the structural frequency is far different from the earthquake predominant frequency; meanwhile, the seismic response of the equipment is lowered through damping dissipation energy, and main electric equipment is protected when an earthquake occurs.

The invention provides a device for tightening fasteners. The device for tightening the fasteners comprises a tightening assembly and a sleeve. The tightening assembly comprises a tightening shaft and a fixing piece, a limiting piece which is matched with the fixing piece is arranged on the outer wall of the sleeve, and the sleeve can be detachably mounted on a tightening shaft through mutual matching of the fixing piece and the limiting piece. The screwing assembly comprises a sleeve connecting tool which is fixed on the tightening shaft, the sleeve connecting tool comprises a driving mechanism which comprises a driving output piece, and the driving output piece is provided with the fixing piece. Under driving of the driving mechanism, the driving output piece can drive the fixing piece to be in butt joint with the limiting piece and to be disengaged from the limiting piece. The invention further provides the tightening assembly and the sleeve connecting tool in the device for tightening the fasteners.

The invention relates to a manufacturing method of a prefabricated assembled deep-arc wave-proof wall. The method mainly comprises the steps of mounting a stirrup, adjusting and fixing a shaping moulding bed, installing main ribs and binding a reinforcement cage, machining a table base, hoisting a reinforcement cage, adjusting and fixing a shaping mold frame, pouring concrete, hoisting the wave-proof wall, and installing the wave-proof wall. According to the manufacturing method, the reinforcing cage is bound by utilizing the shaping moulding bed: the stirrup and the main ribs are clamped in detachable positioning frames on the two sides, the reinforcement cage is bound, and the detachable positioning frames are pulled away in a fragment mode and the steel reinforcement cage is hoisted integrally; and the anti-wave wall is poured through the shaping mold frame, the reinforcement cage is hoisted on the upper portion of the table base, sliding mold frames on the two sides slide in placealong guide rails and fixed, the sliding mold frames on the two sides are removed after the pouring of the anti-wave wall is completed, and the anti-wave wall is lifted off. The manufacturing method is simple in process, convenient to construct and high in production efficiency; and the formed wave-proof wall is good in quality and high in mounting precision, and the problems of traditional prefabricated anti-wave wall steel bar binding and concrete pouring construction are solved.

The invention provides a fresh air device and an air conditioner with the fresh air device. The fresh air device is mounted on a wall body and comprises a first barrel body, a second barrel body and afan assembly, wherein the first barrel body is arranged on the wall body in a penetrating mode; the second barrel body is detachably arranged in a barrel cavity of the first barrel body; and the fanassembly is arranged in a barrel cavity of the second barrel body, and outdoor gas is conveyed to indoor or an air conditioner indoor machine from the second barrel body by the fan assembly. Accordingto the fresh air device and the air conditioner with the fresh air device, the problem that the fresh air device is not prone to being assembled and disassembled in the prior art is effectively solved.

The invention discloses a heater for a semiconductor graphite thermal field. The heater comprises a bottom plate, an ignition mechanism, a clamping mechanism, a driving mechanism and a hinge mechanism. A bottom plate is a horizontally and transversely placed rectangular plate, support columns are arranged at four corners of the bottom surface of the bottom plate, and the ignition mechanism is arranged on the bottom surface of the bottom plate between the support columns. An outer barrel is arranged on the top face of the bottom plate, a crucible is arranged at the top in the outer barrel, a pair of clamping mechanisms are arranged on the outer barrel and located on the two sides of the bottom of the crucible, the crucible is movably connected with the outer barrel through the driving mechanism, an outer cover is arranged at an opening in the top face of the outer barrel and movably hinged to the outer barrel through the hinge mechanism, and a crucible cover is arranged on the bottom face of the outer cover. The invention further discloses a heating method of the heater for a semiconductor graphite thermal field. The problem that bolts are not easy to disassemble and assemble is solved, inconvenience in secondary use of the crucible heater due to repeated disassembly of the bolts is avoided, and the heating stability of the crucible is improved through cooperative use of all mechanisms.

The invention discloses a pressure bearing device suitable for a pressurized coring tool, which includes a pressure bearing assembly and a pin component, wherein the pressure bearing assembly includes a pressure bearing piston and a pressure bearing sleeve arranged on the pressure bearing piston in a sleeving manner; the pin component includes a shear pin; the upper end of the pressure bearing piston is limited on a pressurized connector in a hexagonal sleeve through a pressure bearing steel ball, and the lower end of the pressure bearing piston is a connecting end connected with a rotary assembly; the pressure bearing sleeve is fixedly connected with the pressure bearing piston through the shear pin; the lower end of the pressure bearing sleeve is limited on a short joint of an outer cylinder; and sand discharge holes and flow channels communicated with an inner chamber of the pressure bearing piston are arranged at the upper end of the pressure bearing piston. The pressure bearing device solves the problem that the conventional pressurized coring tool damages the performance of the outer cylinder as a pin penetrates through the outer cylinder, and achieves the purpose that the structure and performance of the outer cylinder are not damaged.

The invention discloses a flat plate thick film heater and a preparation process thereof. The heater comprises a circular base plate, a thick film heat generating layer as a heating element on a lowersurface of the circular base plate, a through hole at the center of the circular base plate, and a support cap disposed on the upper surface of the circular base plate. A heating area is arranged between a peripheral edge of the circular substrate and the through hole and is adjacent to the peripheral edge of the circular substrate and the through hole, an insulating protection film layer is printed on the surface of the thick film heat generating layer, the support cap protrudes upward from an edge of the through hole, and an open end of the support cap is fixed to the through hole by welding. According to the process, the circular base plate is moulded to form a circular disk surface structure, a printing area is reserved at the edge of the circular base plate and a functional layer isprinted, and an NTC thermistor is lapped in the printed area on an insulating thick film heat conducting layer. The heater of the invention has the advantages of simple structure, simple production process and short heating time, the stability and reliability of the structure of a resistance layer can be ensured, the heating time is greatly saved, and the problem that a stirring knife is difficultto disassemble and clean is solved.

A universal wrench, comprising a wrench head, a transmission part, a screwing part, the wrench head is concentrically arranged with a driving gear capable of driving the wrench head to rotate, the screwing part is concentrically arranged with the screwing gear, and the transmission parts are arranged in N groups adjacent to each other. It is composed of rotating transmission groups, each transmission group is equipped with a transmission gear for transmitting torque, the driving gear is meshed with the transmission gear of the first transmission group, and the transmission gear of the last transmission group is meshed with the screwing gear, N is a natural number not less than 3. The advantage is that the torsional force of the screwing part is transmitted to the wrench head through the transmission part, so as to realize the use purpose of the wrench head to twist the bolt. Since the transmission part is composed of N sets of adjacent transmission groups that can rotate relatively, the transmission part can be adjusted. The shape extends into a small space or a hidden place to complete the screwing operation; the torque from the screwing part to the wrench is transmitted through the gears, and the meshing between the gears is stable and not easy to disengage, and the torque can be effectively transmitted, even if the bolts are firmly connected. Twist to install or remove.

The invention belongs to the field of electric energy utilization, and provides an easy-disassembled ultrasonic vibrator for the problem of difficult disassembly of ultrasonic vibrators in electric appliances in the prior art. The easy-disassembled ultrasonic vibrator comprises a vibrator mounting base mounted on the wall of a cleaning container; the vibrator mounting base is detachably connectedwith a vibrator barrel fixed base; a vibrator mechanism is arranged in the center position of the upper part of the vibrator fixed base; the vibrator mechanism comprises a vibrator upper clamping iron, a piezoelectric ceramic body and a vibrator lower clamping iron fixed by center screws in sequence from top to bottom; the vibrator upper clamping iron is used as a vibrator radiation surface of thepiezoelectric ceramic body; the vibrator upper clamping iron and the vibrator barrel fixed base are fixed through a third fixed screw; the vibrator fixed base is connected with a vibrator barrel wallfor holding ultrasonic devices inside through threads; the piezoelectric ceramic body and the vibrator lower clamping iron both extend into the vibrator barrel wall; an electric conducting ring is arranged at the lower part of the side wall of the vibrator barrel wall; multiple sets of elastic power transmission electrodes are arranged at the lower part of the vibrator mounting base; the electricconducting ring is used for transmitting power into the vibrator barrel wall; and the third fixed screw is provided with a spanner jaw hole.

The invention aims to provide a beaded photo frame. The beaded photo frame is manufactured by using a rope tape and frame beads to bind with an inner core and a back board, wherein the frame beads are replaceable without cutting sections and angles. The traditional processing technology for a photo frame is changed; the processing technology is simpler. Consumers can cut the inner core or the back board according to the desired shapes, and assembly decoration photo frames, screens, box mirrors and three-dimensional box by themselves. According to the beaded photo frame, a nail installation manner in traditional manufacture of the photo frame is changed; furthermore, the problem that the photo frame which is installed through nails cannot be dismounted and disassembled or is difficult to dismount or disassemble can be solved. The assembly manner of the photo frame can be changed without cutting the sections and the angles; the technology is simple and practical, so that the equipment investment and labor cost can be reduced, no pollution caused by sawdust and dust exists, and convenience in repair and maintain is realized; furthermore, the shapes are more varied and personalized, so that the diversification of the home decoration style can be more easily realized, and the consumption mode of home decoration can be changed; the beaded photo frame is further convenient to carry; users can more conveniently replace the inner core or frame beads, so that the individual needs of people can be better met.

The invention provides a laser welding and testing integrated method for a condensation pipe. The method comprises the steps that a welded condensation pipe workpiece is assembled and is clamped and fixed, a U-shaped pipe is inflated with protective gas, and a laser machining head is moved to the joint position; a welding laser beam is output, a multi-freedom-degree mechanical arm is used for controlling the movement of the laser machining head, a focusing laser beam conducts one-circle scanning along the stand column pipe installing hole outline position, and an integral annular welding lineis formed; in the scanning process, the laser power is adjusted in real time, and a laser ring welding line is obtained; through an automatic lifting device, the condensation pipe workpiece obtained after welding is immersed in water, air tightness of the condensation pipe workpiece under the standard testing air pressure is tested, and when points of solder skips are found, welding is conducted again; or otherwise, hot air is adopted for blowing-dry after automatic elevating. According to the laser welding and testing integrated method for the condensation pipe, integrated and automatic laserwelding and testing and online welding defect repairing of the U-shaped condensation pipe are achieved, and the technical problems about automatic welding and online automatic welding line quality testing of the kind of components for a long term are solved.

The invention provides a disassembling and transporting method of a main drive of a shield tunneling machine in a tunnel. The method comprises the steps that other structures except the main drive, ashell and a soil cabin partition plate are disassembled; the soil cabin partition plate is cut to form a notch penetrating through the position between a main drive reduction box and the shell, and the notch is located below the main drive reduction box; a rail to the outside of the tunnel is laid in the notch; a transporting cart which is provided with a plurality of supporting pieces used for supporting the main drive reduction box is supplied; the transporting cart is arranged on the rail and kept below the main drive reduction box, and the supporting pieces make contact with the main drivereduction box; the soil cabin partition plate is annularly cut along the outer wall of the main drive reduction box until the main drive reduction box is completely separated from the soil cabin partition plate, and the supporting pieces completely support the main drive reduction box; the transporting cart is kept on the rail and dragged along the rail, and thus the main drive is transported tothe outside of the tunnel to be disassembled. The main drive is conveyed to the outside of the tunnel to be disassembled, so that the problem that the main drive is not easy to disassemble due to narrow space in a shield tunneling machine shell is solved.

The invention discloses a cylindrical wrench which comprises a cylinder 1, an expansion plug 2 and a pull rod 3. The expansion plug 2 is arranged in the cylinder 1. One end of the pull rod 3 is fixed with the expansion plug 2, and the other end of the pull rod 3 extends out of the cylinder1. A preset number of cutting seams 14 are formed in the cylinder 1 in the axial direction, and a conical surface 12 is further arranged on the inner wall of the cylinder 1. One end of the cylinder 1 is provided with a cylinder opening 11, and the expansion plug 2 can be driven by the pull rod 3 to move along the conical surface 12 so as to change the size of the cylinder opening 11. The cylinder opening is formed in one end of the cylinder , the expansion plug is driven by the pull rod to move along the conical surface, the effect of changing the size of the cylinder opening is achieved, the wrench effect is achieved, and therefore the problem that in the prior art, when thin-wall barrel-shaped pieces are in threaded connection, disassembly and assembly are not easy is solved.

The present invention relates to the technical field of protective devices, in particular to a water meter anti-theft device, which includes a storage chamber for placing a water meter and a water pipe connection joint, snap rings at both ends of the storage chamber, and the storage chamber is along the direction of the center of the pull ring There is an opening through the side wall of the storage cavity, and grooves embedded in the side walls of the storage cavity are provided in the direction of the two side walls of the pull ring, and the water pipe and The connection joint of the water meter is set in the accommodation cavity, so that the user cannot disassemble the water meter, which solves the problem that some unscrupulous residents steal water by changing the direction and modifying the water meter in life; When repairing and replacing the water meter, use a wrench to break it upward along the direction of the pull ring, and a groove is provided, so that the maintenance personnel can easily pull up the pull ring along the direction of the groove to open the accommodating cavity, so as to facilitate the maintenance of the water meter. The problem that the anti-theft device in the prior art is difficult to disassemble after installation is solved.

The invention discloses a high pressure sealing plug comprising an outer end face and an inner contact face. Sealing grooves are arranged below the part, close to the inner contact face, of a plug body, and internally provided with sealing rings, and the center position of the plug body is provided with a first groove which is internally provided with a first sealing auxiliary block. According tothe high pressure sealing plug with the sealing rings which are fastened firmly and are not liable to shift, the shortcomings that the sealing rings arranged on the sealing plug are liable to shift orslide and consequently the high pressure plug is failed are overcome. The center position of the plug body is provided with the first groove which is internally provided with the first sealing auxiliary block, and the expansion for the plug body can be achieved through the first auxiliary block by extrusion of the plug body after the plug body is installed in a hydraulic valve block; and the pressure between the plug body and the pipe wall of the hydraulic valve block is increased, thereby playing a role in fixation of the plug body.

The invention discloses a spline shaft dismounting device, used for taking out a spline shaft with the top extending out of a sleeve from the sleeve. The spline shaft dismounting device comprises: a fixed cylinder body provided with an external thread on the outer surface and sleeved and fixed to a sleeve; a torsion barrel provided with a threaded hole matched with the external thread, wherein the torsion barrel moves in the axial direction of the fixed barrel through rotary matching of the threaded hole and the external thread; an elastic lining sleeved and fixed to the top of the spline shaft, wherein the elastic lining faces the end face of the torsion cylinder and is used for being in contact with the torsion cylinder. when the torsion cylinder is controlled to move in the direction facing the elastic lining, the torsion cylinder applies acting force to the end face, facing the torsion cylinder, of the elastic lining, so that the elastic lining and the spline shaft are synchronously pushed away from the sleeve by the torsion cylinder, and then the spline shaft is separated from the sleeve; the device which is convenient to operate and simple in structure solves the problem that the spline shaft is difficult to disassemble during interference fit connection.

The invention aims at providing a bead clamping photo frame. The bead clamping photo frame is made by clamping plates with a frame bead, wherein the frame bead is replaceable, section cutting and corner cutting are not needed, a traditional processing technology of the photo frame is changed, the processing technology is simpler, and a consumer can cut an inner core or a back plate according to a model as needed by the consumer and assemble an adornment photo frame, a screen, a frame mirror, a three-dimensional box and the like The bead clamping photo frame disclosed by the invention changes a traditional binding manner during manufacturing the photo frame, solves the problems that the photo frame cannot be disassembled or is not easy to disassemble, and changes the assembling manner of the photo frame; section cutting and corner cutting are not needed, the technology is simple and practical, the equipment investment and the labor cost are reduced, pollution of saw powder and dust does not exist, the reparation and the maintenance are convenient, the model is diversified and personalized, the diversification of the style of the home decoration is easier to realize, the consumption model of the home decoration is changed, the bead clamping photo frame is also convenient to carry, the replacement of the inner core or the frame bead is also convenient, and the personal need of people can be satisfied better.

The invention discloses a low-voltage power distribution cabinet, and relates to the technical field of power distribution cabinets, in particular to a low-voltage power distribution cabinet, which comprises a bottom plate, circular holes which are symmetrically distributed are formed in the bottom plate, main piles which are oppositely distributed are movably connected to the circular holes in the bottom plate, and fixed bases are fixedly connected to the bottom ends of the main piles. According to the low-voltage power distribution cabinet, the symmetrically-distributed circular holes are formed in the bottom plate, the fixing nuts which are oppositely distributed are in threaded connection with the two sides of the outer portion of the bottom plate, the symmetrically-distributed main piles are movably connected into the circular holes in the bottom plate, and meanwhile the fixing bases are fixedly connected to the bottom ends of the main piles; by means of the notch formed in the outer portion of the main pile and the nut in the fixing base, it can be guaranteed that the device can be rapidly installed and lifted, and the problems that an existing device can only be fixedly connected to a cement base and is inconvenient to disassemble are solved.

The invention discloses a muffler for a motorcycle exhaust pipe and its assembly, including a connecting mechanism, a waste gas displacement control mechanism, a sound-absorbing combination, a water circulation heat dissipation combination and an assembled tail end mechanism. The connecting mechanism has a built-in cavity, and the exhaust gas discharge The volume control mechanism includes a fine-tuning part and an exhaust part, and the exhaust part includes a safety outer cylinder, an inner core ring welded in the middle of the inner cavity of the safety outer cylinder, and an anti-seepage pad installed outside the safety outer cylinder, The sound-absorbing combination includes a jacket and an output pipe located in the middle of the jacket. By opening an inwardly recessed annular notch on the inner side of the outer end of the jacket, at this time, insert the external port on the inner side of the ring, and use the fixing piece to fix the jacket and the external port, and use the ring at the inner end of the cooling member to The protrusion pair interferes with the fixation of the inner cylinder, so that the exhaust pipe can be quickly disassembled, thereby solving the problem that the exhaust pipe is difficult to disassemble today.

The invention discloses a fuel oil pipeline joint. The fuel oil pipeline joint comprises a male joint and a female joint, and further comprises a lock catch for mounting the male joint onto the male joint, wherein the male joint is of a hollow structure which is through from top to bottom; the male joint comprises a male joint connecting tube, a first hose connecting part, an outer retainer ring and an inner blocking ring; the female joint is of a hollow structure which is through from top to bottom; the female joint comprises an opening structure, a female joint connecting tube and a second hose connecting part; lock catch mounting holes which are through from left to right are separately formed in the left side and the right side of the opening structure; buckling slots are separately formed in the front side wall and the rear side wall of the opening structure; buckling slots are separately formed in the left end and the right end of each side wall; the circular opening communicates with the lock catch mounting holes and the buckling slots; the lock catch comprises a U-shaped lock catch body which is horizontally arranged, an upper step part and a lower step part; and the opening of the U-shaped lock catch body is arranged towards the lock catch mounting holes. The invention provides the fuel oil pipeline joint which is simple in structure, is convenient to manufacture and is convenient to dismount.

The invention discloses a preassembled box-type transformer, which comprises a chassis, the bottom of the chassis is fixedly connected with symmetrically distributed movable clips, and the top of the chassis is movably connected with symmetrically distributed limit clips. The pre-installed box-type transformer connects symmetrically distributed limit cards on the top of the chassis, and fixedly connects symmetrically distributed fixing plates on the inside of the limit cards, and opens symmetrically distributed rectangular slots inside the limit cards. The notch inside the limit card and the buckle column are adapted to each other, and at the same time, the movable clamp plate is fixedly connected to the distribution at the bottom of the chassis, which can ensure that the device can be disassembled, installed and installed at any time during the use of the device. Transportation, and thus solve the problem that the existing device needs to pour cement bases on the road to install the box-type transformer, which makes the box-type transformer not easy to disassemble.