97results about How to "Reduce connection gaps" patented technology

The invention belongs to the technical field of building components, and relates to an insertion connecting component with a tension connection function. By the aid of the insertion connecting component, the technical problem of unreliability in connection in the prior art can be solved. The insertion connecting component comprises a first tension nut and a second tension nut. The first tension nut and the second tension nut are respectively fixed to two ends of a prefabricated member, an insertion rod is detachably connected into the first tension nut, a middle nut is detachably connected into the second tension nut, an elastic component is arranged in the second tension nut, a clamp ring is arranged between the middle nut and the elastic component, the insertion rod can be clamped by the clamp ring when being inserted into the middle nut, the middle nut comprises a nut body, external threads are arranged on the outer wall of the nut body, a channel is arranged inside the nut body, an insertion connector can penetrate the channel, an end of the channel is expanded to form a clamp ring positioning cavity capable of accommodating the clamp ring, a clamp ring limiting cavity is arranged at an end of the clamp ring positioning cavity, and the clamp ring can be blocked by the clamp ring limiting cavity when slipping towards the end of the clamp ring positioning cavity and accordingly can be prevented from slipping out of the clamp ring positioning cavity. The insertion connecting component has the advantages that the insertion connecting component is stable and reliable in insertion procedures, and accordingly the construction work efficiency can be improved.

The invention discloses a connecting rod punch press, comprising a rack, a crankshaft, a lower slide block, and a crankshaft rotation drive device, wherein the lower slide block is in sliding fit with the rack. The connecting rod punch press is characterized in that an upper slide block is arranged inside the rack; the upper end of the rack is provided with a dynamic balance connecting mechanism of the upper slide block; a first link transmission mechanism is arranged among the crankshaft, the lower slide block and the upper slide block; the rack is provided with an upper slide block adjusting mechanism which is used for adjusting the height of the mold. The connecting rod punch press has the advantages that the upper slide block is arranged inside the rack, the rack is provided with the upper slide block adjusting mechanism which is used for adjusting the height of the mold, and the upper and lower positions of the upper slide block can be adjusted through the adjusting mechanism, thus the height of the mold of the connecting rod punch press is adjusted, meanwhile, the internal structure of the lower slide block is also reduced, the structure of the lower slide block is simplified, the condition that the lower slide block can bear good punching, and does not deform when the connecting rod punch press is used for punching at high temperature is ensured, the punching stability of the punch press and the accuracy of a punched product are ensured, and the connecting rod punch press can be applicable to high-temperature punching.

The invention discloses a stone floor surface construction method, and belongs to the field of building construction. According to the technical scheme, the method comprises the following steps: performing construction preparation, cleaning the base course, elevation locating, snapping line, performing trial splicing and trial arrangement, paving leveling course mortar, paving stone panels, pouring cracks, wiping joints, maintaining, sticking skirting boards, waxing, and performing effective construction on the stone floor surface. The construction scheme is effectively improved, and the method has the advantages of improving the overall connection effect and prolonging the service life.

The invention discloses a spliced display screen, and overcomes the problem that the splicing gap of a traditional spliced display screen is too large. The spliced display screen is formed by splicing 2N display assemblies, each display assembly comprises a screen, a splicing frame and a projection box, the protection box includes a rectangular installation frame which is convenient to install, the splicing frame comprises two vertical splicing plates and two horizontal splicing plates, the length of the vertical splicing plates is the same with that of a vertical support of the installation frame, the length of the horizontal splicing plates is the same with that of a horizontal support of the installation frame, one side of each splicing plate is vertically and fixedly connected with the installation frame via a right-angle connecting piece, the opposite side of the splicing plate is provided with multiple splicing holes, each side of each screen is provided with screen holes, the screen holes and splicing holes are penetrated by clamping pins, and the thus the screen is vertically and fixedly connected with the splicing frame. The spliced display screen is simple in structure and convenient to assemble, realizes seamless and infinite splicing, reduces the production cost and is suitable for large-scale production and application.

The invention discloses an integral type stainless steel seat. The seat disclosed by the invention comprises an integral type seat surface cover and a seat frame fixed with a side wall; a surface cover bracket is fixed on the back side surface of the seat surface cover; hooks are arranged at the upper end of the surface cover bracket; seat clamping hooks corresponding to the hooks are arranged on the side wall; and the surface cover bracket is fixedly connected to the seat frame through bolts. According to the integral type stainless steel seat disclosed by the invention, the seat clamping hooks and the seat frame can be connected to the side wall firstly, and then the stainless steel seat surface cover with the surface cover bracket is directly clamped from the top to the after the mounting of the seat clamping hooks and the seat frame is completed; the seat surface cover and the surface cover bracket are respectively connected with the seat frame through a fastening part only on the bottom of the seat, so that the seat mounting points cannot been seen from the whole surface of the seat, the potential safety hazard caused when the fastening part is exposed can be avoided; the operation of mounting is only carried out at the bottom of the seat; the integral type stainless steel seat is easy to operate, quick, time-saving and labor-saving; and seen from the appearance, the connection gaps of the structure of the seat disclosed by the invention are small, uniform in distribution and good in aesthetics.

The invention relates to a snap spring fixing type rectangular electric connector. The electric connector comprises a housing and an insulating assembly, wherein the inner end face of the insulating assembly is attached to a heavy platform in the housing correspondingly, more than one snap spring slots are arranged on one or more side walls of the insulating assembly, more than one positioning bosses are arranged on one or more inner walls of the housing, snap springs which are pressed in the snap slots tightly by the housing inner walls are arranged in snap spring slots, and the snap springs abut against the sides of the positioning bosses, which face to the inside of the housing. The snap spring slots and through slots which are communicated are arranged on the insulating assembly, positioning bosses in the housing are inserted in through slots correspondingly, snap springs in snap spring slots press tightly, and the insulating assembly and the housing are clamped fixedly. The connector is simple in structure, firm, free from clearance, suitable to harsh environment, not easy to damage, stable in use and long in service life.

The invention provides a system for measuring and controlling a rotating speed. The system mainly comprises a photoelectric speed measuring device 60, a light sensing sheet 61, a data acquisition instrument 62 and an electromagnetic brake 50, wherein the light sensing sheet 61 is arranged at an end part of a rotating shaft 12; the photoelectric speed measuring device 60 and the light sensing sheet 61 are arranged correspondingly; and the electromagnetic brake 50 penetrates the rotating shaft 12, and is arranged on the rotating shaft 12 on the other side opposite to the light sensing sheet 61.

The invention relates to the technical field of environment-friendly decoration materials, and discloses an interior decoration partition wall which comprises a wall. A mounting component is inlaid inthe top of the front surface of the wall, a through slide groove with an arc-shaped top is formed in the middle of the bottom of the mounting component, a base plate, a connecting plate I, a connecting plate II and a tail plate are sequentially clamped with the mounting component via the slide groove from left to right, and positioning strips which are matched with the slide groove are fixedly connected with the tops of the base plate, the connecting plate I, the connecting plate II and the tail plate. The interior decoration partition wall has the advantages that positioning and slide effects can be realized by the slide groove and the positioning strips, the base plate, the connecting plate I, the connecting plate II and the tail plate can be conveniently clamped with the bottom of themounting component under limit effects of the slide groove, accordingly, the problem of high consumption of working hours due to the fact that partition walls need to be manually aligned and drawn together can be solved, large quantities of human and material resources can be saved, and the mounting convenience can be improved; errors in manual drawing procedures can be prevented, and the mountingprecision of the interior decoration partition wall can be improved.

The invention discloses a structure for converting a female connector into a male connector, comprising a female outer conductor with an external thread part removed, a male inner conductor and a support medium, wherein the male inner conductor and the support medium are arranged in the female outer conductor, a conductive sleeve is fixed on the female outer conductor, a threaded sleeve is fixed on the conductive sleeve and used for converting to the male head of the connector, and a waterproof rubber ring is arranged in a groove formed by the conductive sleeve and the threaded sleeve. The invention also provides a method for realizing the structure for converting the female connector into the male connector. The invention has the following significant characteristics and effects that: (1) the structure is simple; (2) installation is simple and convenient for large-lot production; (3) passive intermodulation is low: the connection gap between the connector and a cavity is reduced, thereby improving the passive intermodulation level of the product; (4) the female head can be converted into the male head without changing a mold; and (5) the female head can be converted into the male head quickly to respond to the customer needs promptly.

The invention relates to a snap spring fixing type rectangular electric connector. The connector comprises a housing and an insulating assembly, wherein the inner end face of the insulating assembly is attached to a heavy platform in the housing correspondingly, more than one snap spring slots are arranged on one or more side walls of the insulating assembly, more than one positioning bosses are arranged on one or more inner walls of the housing, snap springs which are pressed in the snap slots tightly by the housing inner walls are arranged in snap spring slots, and the snap springs abut against the sides of the positioning bosses, which face to the inside of the housing. The snap spring slots and through slots which are communicated are arranged on the insulating assembly, positioning bosses in the housing are inserted in through slots correspondingly, snap springs in snap spring slots press tightly, and the insulating assembly and the housing are clamped fixedly. The connector is simple in structure, firm, free from clearance, suitable to harsh environment, not easy to damage, stable in use and long in service life.

The invention relates to a mounting structure and method of a high-and-large-space clean room, and belongs to the technical field of mounting of cleanroom metal wall plates. The mounting structure comprises metal wall plates, fixing rods and a moving seat; clamping grooves are formed in the side walls, close to a wall, of the metal wall plates, and the fixing rods are clamped in the clamping grooves of the two or more metal wall plates; every two adjacent metal wall plates are fixedly connected through a connecting piece; a lifting plate is arranged on the moving seat, and clamping parts usedfor being clamped in the side walls of the metal wall plates are slidably arranged at the two ends of the lifting plate in the length direction of the lifting plate; and the lifting plate is providedwith a driving assembly for driving the two clamping parts to move in the direction getting close to or away from each other, and the moving seat is provided with a driving source used for driving thelifting plate to ascend and descend. The multiple metal wall plates are fixed into a whole, thus mounting is convenient, the time of working at the high altitude is reduced, and safety is improved.

The invention provides a water-proof type intelligent teakettle which is applicable to an electromagnetic teakettle and an electric heating teakettle. The water-proof type intelligent teakettle comprises a kettle handle, a kettle lid and a kettle body. A motor driving the kettle lid to turn over and a circuit board are arranged in the kettle handle. The kettle handle comprises an integrated kettle handle body. The two sides of the motor are provided with an inner side sealing ring and an outer side sealing ring respectively. The inner side sealing ring is located between the inner wall of a motor containing groove and the motor and provided with a second through hole with the center consistent with the center of the first through hole at the corresponding position of a rotating shaft of the motor. The outer side sealing ring is attached to the motor and is close to a notch of the motor containing groove. Due to the inner side sealing ring and the outer side sealing ring, water is not likely to enter the motor containing groove, the motor is effectively protected, it is ensured that the motor drives the kettle lid to turn over smoothly, and the waterproof performance is greatly improved; the kettle handle body is of the integrated structure, the number of molds is reduced, the production process is simplified and the cost is effectively lowered; the number of connection gaps is reduced, water is not likely to enter the motor, electronic components inside the motor are effectively protected, the service life of the water-proof type intelligent teakettle is prolonged, and potential safety hazards possibly caused when water enters the circuit are eliminated.

An indoor unit for an air conditioner, in which a gap at a joint between a panel and a body is set small, so that aesthetic design of the indoor unit is not impaired. In the indoor unit (1) of a ceiling mounting air conditioner, an indoor air suction opening (21) is located at a decorative panel (2b) forming the lower surface of the body (2). The indoor unit (1) has a flat panel (3) and a panel drive section (7). The flat panel (3) can take a closed position for closing the suction opening (21) and an open position for opening the suction opening (21) by tilting relative to the closed position. When the flat panel (3) moves from the closed position to the open position, the panel drive part (7) operates the flat panel (3) so that the flat panel (3) pivots about a predetermined pivot point(P3) after descending to a predetermined position.

The invention discloses a ventilation support arm device applied to a dual-throat thrust vector nozzle, and relates to the field of subsonic transonic and supersonic wind tunnel aerodynamics. The device comprises an aircraft model, a ventilation support arm, an air supply pipeline and a support rod, wherein the support rod adopts a slender cube structure; the bottom end of the ventilation supportarm is fixedly connected with the axial end of the support rod; the aircraft model is horizontally and fixedly installed at the top end of the ventilation support arm; the air supply pipeline is fixedly installed on the inner wall of the ventilation support arm; the ventilation support arm comprises a support arm main body and a connecting flange; the support arm main body adopts a hollow parallelogram plate-shaped structure; the connecting flange is fixedly installed at the top end of the support arm main body; and the ventilation support arm is fixedly connected with the aircraft model through the connecting flange. According to the device, collisionless passing of the air supply pipeline of a dual-engine model of the dual-throat thrust vector nozzle in a wind tunnel experiment and a connecting supporting experiment for the model are realized.

The invention discloses an air conditioning air deflector and a manufacturing method of the same. The air conditioning air deflector comprises an arc metal material lining, at least one layer of sound-insulation wind deflector outer layer is arranged on the outer surface of the metal material lining, a fastening component connected with the upper end of the sound-insulation air deflector outer layer is arranged at the upper edge of the inner surface of the metal material lining, a connecting component connected with the lower end of the sound-insulation air deflector outer layer is arranged at the lower edge of the inner surface of the metal material lining, and a middle connecting piece is arranged in the middle of the inner surface of the metal material lining. The sound-insulation air deflector outer layers are arranged on the surface of the metal material lining, so that when an air conditioner is started, sound reduction, sound attenuation and noise reduction functions are achieved; by the additional arrangement of the sound-insulation air deflector outer layers, connecting clearances of air deflectors and air conditioning parts are greatly reduced, and water drops generated under the action of heat conduction are reduced; the sound-insulation air deflector outer layers are tightly connected with the metal material lining, so that convenience in assembly is achieved, production cost is greatly lowered.

The invention relates to an iron smelting blast furnace, in particular to a prefabricated iron tap channel which comprises a steel shell with a U-shaped cross section, a permanent layer arranged in the steel shell, and a working layer arranged on the permanent layer. The permanent layer comprises a prefabricated base arranged on the inner edge of the steel shell; the prefabricated base comprises multiple prefabricated base blocks assembled together along a straight line; each two adjacent prefabricated base blocks are occluded; a prefabricated plate is inserted into the upper end of the prefabricated base through an installation groove and comprises multiple refabricated single plates assembled together along a straight line; each two adjacent prefabricated single plates are occluded; a temperature measurement plate installation groove is formed in the outer side surface of each prefabricated single plate; a temperature measurement plate is arranged in each temperature measurement plate installation groove; a temperature sensor is arranged on each temperature measurement plate; and cables of the temperature sensors penetrate through the steel shell so as to be connected to a controller. The prefabricated iron tap channel is convenient to install and maintain, long in service life, high in safety coefficient, and simple in structure.

The invention belongs to the technical field of building components, relates to a strong pull fastening structure, and solves the technical problem of unreliable connection in the prior art. The strong pull fastening structure comprises a middle nut, and a connecting plug inserted in the middle nut, wherein the end part of the middle nut has a clamping ring consisting of multiple clamping pieces; and when the connecting plug is inserted in the middle nut, the clamping ring can clamp the connecting plug to enable the connecting plug and the middle nut are in clamping fit. The strong pull fastening structure is characterized in that the clamping pieces have at least one clamping tooth inside; the connecting plug has at least one tension step; and the tension steps can be clamped with the clamping teeth to form a step type fastening structure. The tension steps can fit the clamping teeth to form the step type fastening structure, so that a moving gap of the connecting plug can be decreased, a connecting gap between pile bodies can be reduced, and the connection is closer and more reliable.

The invention discloses a shaft coupling mechanism and a universal coupler thereof. The shaft coupling mechanism comprises a first rotating body and a second rotating body which are in transmission connection through engaging of end face teeth, wherein the end face teeth are curve end face teeth. The universal coupler comprises a transmission shaft, and an end face tooth jaw and a universal joint pin which are symmetrically arranged on two ends of the transmission shaft, wherein end face teeth of the end face tooth jaw are curve end face teeth. The shaft coupling mechanism and the universal coupler thereof have small connecting clearances with two shafts of a working machine; the deformation of a connecting surface can be reduced; the problems of large vibration, high noise and loosening at a coupling part after installation caused by the impact generated by the clearances are avoided; the stable level of operation is improved; the number of bolts is reduced; the volume of a link fork is reduced; the space is saved; the cost is reduced; the shaft coupling mechanism and the universal coupler thereof can be applied in special occasions with high temperature and heavy duty of a rolling mill, and can achieve the effects of strong bearing capacity, good centering performance, more stable operation, long service life, high transmission accuracy, low transmission noise, and capability of bearing heavier load with smaller volume.

The invention discloses a transversely-moving type small-line-center-distance single-crossover monorail turnout which comprises a turnout base (14) and turnout beam fixing components. Multiple guide rails (12) are arranged between the turnout beam fixing components and provided with a crossover turnout component and a linear turnout component. The crossover turnout component comprises a first crossover turnout transversely-moving beam (5) and a second crossover turnout transversely-moving beam (6). The linear turnout component comprises a first linear turnout transversely-moving beam (7), a third linear turnout transversely-moving beam (9), a second linear turnout transversely-moving beam (8) and a fourth linear turnout transversely-moving beam (10). By the adoption of the transversely-moving type small-line-center-distance single-crossover monorail turnout, multiple sets of transversely-moving turnout beam components are arranged between the turnout beam fixing components, the guide rails and sliding blocks are arranged between the transversely-moving turnout beam components and the turnout base, a gear and a rack are driven through a drive motor, so that the different transversely-moving turnout beam components are driven to move, and quick change and removal under different working conditions are achieved.

The invention discloses a centrifugal pump for chemical engineering. The centrifugal pump comprises a bottom plate, a centrifugal unit, a replacement unit, a mounting seat, a base, a motor and a coupler; a mounting seat is arranged on the right side of the upper surface of the bottom plate, a groove at the bottom end of the mounting seat is matched with the base, a motor is arranged at the top endof the base, an output shaft of the motor is connected with the right end of the coupler, replacement units are arranged on the left side and the right side of the top end of the mounting seat correspondingly, mounting grooves are formed in the left and right ends of the front and rear sides of the bottom plate, and mobile units are arranged in the mounting grooves; and the centrifugal unit comprises a liquid outlet, a rotating shaft, a pump body, a pipe sleeve and an impeller, the bottom end of the pump body is connected with the left side of the upper surface of the bottom plate through a supporting column, the liquid outlet is formed at the top end of the pump body, the pipe sleeve is arranged in the middle of the right side face of the pump body, and the pipe sleeve is rotationally connected with the rotating shaft. The centrifugal pump for chemical engineering is simple to operate, convenient to move and capable of rapidly disassembling and assembling.

The invention discloses a fireproof power fuse capable of conveniently replacing a fuse wire. The fireproof power fuse comprises a shell, power connection pipes and fuse wires, wherein the two ends ofthe shell are both fixedly connected with the power connection pipes which are horizontally distributed, the inner sides of the two sets of power connection pipes are fixedly connected with power connection blocks which are communicated with the shell, the inner side of the shell is rotatably connected with a rotary disc, and the inner side of the rotary disc is provided with the four sets of fuse wires which are distributed in an annular array mode. According to the present invention, a rotary disc type wire changing structure is adopted, so that convenient replacement of a fuse wire can berealized, the workload of an operator is reduced, and fuse wire replacement convenience is improved so as to facilitate the actual operation and use of the power fuse; and the fuse wire can be coveredand extinguished when the temperature of the fuse wire is abnormal or open fire is generated due to the adoption of the covering type fire extinguishing structure, so that the burning phenomenon of the fuse is reduced so as to improve the use safety of the power fuse wire.

The invention discloses an evaporation plating device. The evaporation plating device comprises a shell, an evaporation plating source unit and an adjusting unit, wherein the evaporation plating source unit and the adjusting unit are positioned in the shell; the evaporation plating source unit comprises a crucible, a nozzle part and a heating part, wherein an evaporation plating material is accommodated in the crucible; an opening is formed in the crucible; the nozzle part is formed in the opening of the crucible; an open part used for enabling vapor of the evaporation plating material to be sprayed out is formed in the nozzle part; the heating part is arranged around the crucible and the nozzle part; the adjusting unit is arranged around the nozzle part; a protection structure is arrangedat the neighbouring part between the adjusting unit and the nozzle part; and the protection structure is used for stopping the vapor of the evaporation plating material from invading a gap in the neighbouring part between the adjusting unit and the nozzle part. The evaporation plating device disclosed by the embodiment of the invention has the advantages that the diffusion path of a pollution source can be prolonged by arranging the protection structure at the neighbouring part between the adjusting unit and the nozzle part, and the connection gaps between devices in the evaporation plating device can be narrowed to prevent pollution in a cavity of the evaporation plating device.

The invention relates to the technical field of photovoltaic cell manufacturing, and discloses a diffusion furnace for photovoltaic cell manufacturing. The diffusion furnace comprises a furnace body,a quartz tube is arranged in the furnace body, an inner sealing piece is arranged on the inner wall of the quartz tube, the outer wall of the furnace body is rotatably connected with a furnace door, and the side wall of the furnace body is sleeved with an outer cover. A hoop ring is fixedly connected to the end, connected with the furnace body, of the outer cover, an extrusion piece is arranged between the inner sealing piece and the furnace door, and a one-way air valve is installed on the outer wall of the furnace door. The inner sealing piece plays a role in sealing the tube opening of thequartz tube, gas in the quartz tube is prevented from leaking outwards, heat loss caused by air convection is reduced under the action of the vacuum cavity in the inner sealing piece, and therefore the temperature difference between the tube opening of the quartz tube and the inner cavity of the quartz tube is reduced, and the uniformity of sheet resistance of silicon wafers in the quartz tube isimproved; and the deformation of the inner arc plate at high temperature improves the extrusion force on the inner wall of the quartz tube so that the connecting gap is reduced, and the sealing performance is further improved.

The invention provides a commercial electromagnetic rice cooker overall waterproof structure and a commercial electromagnetic rice cooker. The rice cooker comprises a shell and an inner container fixedly arranged in the shell. The shell comprises a bottom plate, an inner side plate arranged on the bottom plate and surrounding the inner container, and an outer side plate arranged on the bottom plate and surrounding the outer side of the inner side plate. A water stopping piece in an annular step shape is arranged between the inner side plate and the outer side plate, and comprises a vertical plate vertically arranged, an upper transverse plate arranged at the upper end of the vertical plate, extending inwards horizontally and fixedly connected with the inner side plate, and a lower transverse plate arranged at the lower end of the vertical plate, extending outward horizontally and fixedly connected with the outer side plate. The shell comprises an edge surrounding piece fixedly connected to the annular edge of the inner container. The edge surrounding piece comprises an annular transverse plate connected to the annular edge of the inner container and extending outward horizontally.The annular transverse plate is fixedly connected to the upper side of the upper transverse plate in a sealed mode. Due to the dual-layer water stopping structure formed by the two layers of side plates in the shell and the annular step-shaped water stopping piece arranged between the two layers of side plates, the waterproof sealing performance of the whole rice cooker can be effectively improved.

The invention relates to a cleaning room fire window which comprises a window frame installed on a wall window hole. The window frame comprises an integrally-connected front window frame and an integrally-connected back window frame, a fire-resistant glass window assembly is arranged on the middle portion of the window frame, the front window frame and the back window frame are mutually fixed and separated, and compass bars provided with slant sides and pressing on the front face and the back face of the fire-resistant glass window assembly are arranged on an edge of the window frame. The invention further relates to a manufacture and installment method of the cleaning room fire window. The window frame is composed of the integrally-connected front window frame and the integrally-connected back window frame and clamped on a wall, the fire-resistant glass window assembly is fixed by the compass bars with the slant sides, dust stratification and dust production are avoided, sealing cleaning performance meets a cleaning standard, additionally the front window frame and the back window frame are mutually separated, a thermal-protective layer is formed by the fire-resistant glass window assembly in the middle, and performance meets requirements of clean room fire safety standards. The cleaning room fire window can be used for clean rooms with high fireproof performance requirements and construction of the clean rooms.

The invention discloses a water pump coupling, and particularly relates to the field of coupling manufacturing. The water pump coupling comprises a lower shaft sleeve, wherein a lower chuck is fixedly installed on the top surface of the lower shaft sleeve, an upper chuck is connected to the top surface of the lower chuck in a clamped mode, an upper shaft sleeve is fixedly installed on the top surface of the upper chuck, threaded holes are formed in one side of the lower shaft sleeve and one side of the upper shaft sleeve, and matched set screws are arranged in the threaded holes. Plug pin grooves are formed in the inner walls of the lower shaft sleeve and the upper shaft sleeve, square holes are formed inside the lower chuck and the upper chuck and penetrate through the lower chuck and the upper chuck, and a locking plug pin is fixedly installed in the square holes of the lower chuck and the upper chuck. According to the water pump coupling, the connection principle of a tenon-and-mortise structure is used for reference, the lower chuck and the upper chuck which are same in structure and specification are utilized, and therefore a connection gap between the lower chuck and the upper chuck can be reduced to a large extent, the mutual movement between couplings in the electric working process is reduced, swing of the couplings is avoided, the coaxiality between a motor shaft and a pump shaft in the motor working process can be improved, and the normal work of the whole water pump is ensured.

The invention discloses a laminated aluminum plate wall surface mounting structure. The structure comprises a laminated aluminum plate, a support, a sliding plate and an adjusting plate. A connectinggroove is formed in the back surface of the laminated aluminum plate; baffles are symmetrically arranged at the two sides of the front face of the support, penetrating sliding holes are formed in thebaffles, and the support is arranged on the back face of the laminated aluminum plate; the sliding plate is provided with connecting holes matched with the sliding holes, and the sliding plate is installed on the support in a sliding manner; the adjusting plate is arranged at the side edge of the support, a connecting rod is fixedly connected to the adjusting plate, the connecting rod penetrates through the sliding holes to be fixedly connected with the connecting holes, an adjusting rod is connected to the adjusting plate in a threaded manner, and the adjusting rod penetrates through the adjusting plate to abut against the outer side face of the support; and the laminated aluminum plate can be rapidly and conveniently fixed and installed, connection is stable, and the surface is kept flat.

The invention discloses a split mounting type heat preservation building board. The split mounting type heat preservation building board comprises square frames, a heat preservation layer, a buffer protection layer and an outer protection layer, wherein limiting inner frames are arranged in one sides of the square frames, packaging layers are arranged on the sides, close to the limiting inner frames, in the square frames in a matched mode, the side faces of the packaging layers are provided with embedded decoration layers matched with the inner sides of the limiting inner frames, and the adjacent square frames are assembled and connected together through assembling units; the heat preservation layer is arranged on the side, close to the packaging layer, in the square frame; the buffer protection layer is arranged on the side, close to the heat preservation layer, in the square frame, and the buffer protection layer is clamped and fixed to the inner side of the square frame through a buffer protection layer fixing assembly; and the outer protection layer is installed on the side, away from the heat preservation layer, of the buffer protection layer through a buckle assembly, a gap is reserved between the bottom of the outer protection layer and the bottom of the inner side of the square frame, and an outer protection layer disassembling and supporting assembly is installed in the gap. A multi-layer structure is adopted, the environment-friendly effect of reducing heat loss is achieved, meanwhile, external collision can be buffered, the damage probability is reduced, the connecting gap is small, and the heat preservation effect is good.

The invention relates to a snap spring fixing type rectangular electric connector. The connector comprises a housing and an insulating assembly, wherein the inner end face of the insulating assembly is attached to a heavy platform in the housing correspondingly, more than one snap spring slots are arranged on one or more side walls of the insulating assembly, more than one positioning bosses are arranged on one or more inner walls of the housing, snap springs which are pressed in the snap slots tightly by the housing inner walls are arranged in snap spring slots, and the snap springs abut against the sides of the positioning bosses, which face to the inside of the housing. The snap spring slots and through slots which are communicated are arranged on the insulating assembly, positioning bosses in the housing are inserted in through slots correspondingly, snap springs in snap spring slots press tightly, and the insulating assembly and the housing are clamped fixedly. The connector is simple in structure, firm, free from clearance, suitable to harsh environment, not easy to damage, stable in use and long in service life.

The invention relates to a mud densimeter and a fluid filling method for a mud test. A positive connecting base and a negative connecting base of the densimeter are respectively welded to a positive direction and a negative direction of a differential pressure transducer, a pipe is respectively welded to a plate, two straight barrels and a disc, two membrane base assemblies are respectively welded on two straight barrels, one ends of two capillaries respectively pass through the plate and two holes on the inner wall of the plate to be welded to a fluid pipe I and a fluid pipe II, the other end of the capillary I is welded and fixed on the negative connecting base and communicated with a filling hole I, the other end of the capillary II is welded and fixed with the positive connecting base and communicated with a filling hole II, the differential pressure transducer is arranged in an accommodating chamber and fixed to the accommodating chamber with screws, the accommodating chamber and the plate are fixed together with screws, and a shell assembly and the differential pressure transducer are fixed together. The mud densimeter is of a full welded structure, has good sealing performance, long service life and high reliability, is reliable to transport and convenient to move and remount, and satisfies the requirement for current market on a high-accuracy intelligent mud densimeter.