358results about How to "Reduce distance" patented technology

Embodiments of the invention provide a write head for perpendicular recording in which the magnetic field intensity applied at a read element is reduced with larger write-field gradients and the distance between a write element and a read element is small. In one embodiment, a pair of magnetic bodies for shielding a read element are provided on the leading and trailing sides of the read element respectively and whichever one of the two shields is the longer in the length from the air bearing surface is shorter than the length up to the back contact position PBK at which a main pole and an auxiliary pole are connected.

This invention discloses a high-speed slitting device for cold-rolled steel sheets, relating to the field of cold-rolled steel sheet shearing technology. It includes a shearing assembly for cutting cold-rolled steel sheet coils, with a pre-treatment box mounted on the front surface of the shearing assembly. In operation, the invention starts an electromagnetic rod and a rolling motor. The rolling motor drives a drive gear to rotate, which in turn drives two driven gears to rotate in opposite directions. These gears, through a gear ring, drive two toothed rods to rotate, further rotating the upper and lower rolling rollers to electromagnetically roll the two sides of the cold-rolled steel sheet. Combined with an eddy current sensor and a PLC controller, the magnetic field force is intelligently and dynamically adjusted according to the edge conditions of different hardness levels, achieving "flexible de-hardening." Then, a U-shaped focusing induction coil is activated to achieve rapid localized heating of the hardened layer, restoring the hardness to near that of the substrate, thus eliminating work hardening. The combination of magnetic rolling and localized heating softening achieves "full-thickness softening."

This invention discloses a positioning fixture and welding method for welding landscape bridges, mainly relating to the technical field of welding devices. It includes a first base plate and a second base plate, each with several L-shaped blocks. A first sliding rod is slidably connected to each L-shaped block, and several arc-shaped plates are provided at the ends of the first sliding rods. A first spring is provided between the arc-shaped plates and the L-shaped blocks. It also includes fixing plates symmetrically arranged at both ends of the first base plate and used in conjunction with the second base plate. A first sliding plate and a second sliding plate are slidably connected to the first and second base plates, respectively. The first and second sliding plates are slidably connected, and a first welding torch is mounted on the first sliding plate. Furthermore, it includes a third sliding plate detachably connected to the first sliding plate, and a second welding torch is mounted on the third sliding plate. The beneficial effects of this invention are: solving the problem of low on-site construction efficiency in existing landscape bridge welding, improving the efficiency and quality of landscape bridge welding, and reducing the labor intensity of workers.

This invention provides a hydraulic control system for a concrete placing boom, comprising a hydraulic oil tank, an oil supply pump unit, a main hydraulic pressure pipeline, a main return hydraulic pipeline, and at least one hydraulic actuator unit. The oil supply pump unit is located on the main hydraulic pressure pipeline. Each hydraulic actuator unit includes a hydraulic cylinder and a control valve assembly. The control valve assembly is located close to the hydraulic cylinder, or integrated onto the hydraulic cylinder. The control valve assembly includes a main directional valve, a standby directional valve, and a balance valve assembly. The inlet ports of the main directional valve and the standby directional valve are respectively connected to the main hydraulic pressure pipeline. The return ports of the main directional valve and the standby directional valve are respectively connected to the main return hydraulic pipeline. The outlet ports of the main directional valve and the standby directional valve are respectively connected to the hydraulic cylinder via the balance valve assembly. This invention also provides a control method for the hydraulic control system of the concrete placing boom and a concrete placing boom device.

The invention discloses a common production line for concrete electric poles and tubular piles. The common production line comprises a material distribution room, a production room, a mold removal room, a universal mold treatment room, an independent mold treatment room, a universal material preparation room, an independent material preparation room and a mold closing room. The production room is located on the side face of the material distribution room, and the universal mold processing room and the universal material preparation room are sequentially arranged on the side face of the material distribution room and used for cleaning and assembling electric pole molds or pipe pile molds. The universal mold processing room and the universal material preparation room are adjacent to the production room in the longitudinal direction; the independent mold treatment room and the independent material preparation room are sequentially arranged in the transverse direction and are adjacent to the universal mold treatment room; the mold removal room is located in the universal mold treatment room and extends into the production room and between the independent mold treatment room and the independent material preparation room in the longitudinal direction; the mold closing room is located on the side face, close to the material distribution room, of the universal mold processing room and extends into the production room; and a plurality of hoisting devices for hoisting the molds are also arranged above the production line.

The utility model relates to a pressure bandaging device for ophthalmology, which belongs to the technical field of medical appliances and comprises shielding sheets, a pressure mechanism is arranged on one side of each shielding sheet, an adjusting mechanism is arranged between the shielding sheets on the two sides for connection, and the adjusting mechanism comprises a mounting seat, a threaded rod, a connecting belt, a threaded sleeve and a fixing seat. The beneficial effects of the utility model are that the adjusting mechanism is arranged, and the two ends of the adjusting mechanism are respectively and movably connected with the shielding sheets, so that when the distance between the shielding sheets on the two sides needs to be adjusted, the threaded rod can be rotated, the overall inclination angle of the sleeve and the threaded rod can be adjusted, and the distance between the shielding sheets on the two sides can be shortened; on the contrary, the pressurizing mechanism and the shielding piece can be lengthened, so that the pressurizing mechanism and the shielding piece can be suitable for people of different ages to use, the application range of the device is wider, meanwhile, threaded connection is adopted, the stability of the device is higher, deviation is not prone to occurring, and the pressurizing effect on the eyes is better.

The utility model provides a kind of etching cavity for realizing process gas quick switching, and etching cavity includes plasma source chamber and reaction chamber, and the upper surface of reaction chamber is equipped with the gas inlet of process gas;Quick gas replacement device includes the gas pipeline, gas control assembly and gas inlet pipeline that are sequentially communicated along process gas gas inlet direction;Gas pipeline is communicated with process gas gas source, and gas inlet pipeline is communicated with gas inlet;Gas control assembly includes the input, gas inlet valve, flow controller, process gas branch and output that are sequentially communicated along process gas gas inlet direction;Input is communicated with gas pipeline, and output is communicated with gas inlet pipeline;Gas control assembly is also equipped with fixed plate, and fixed plate is installed in plasma source chamber, and the input, gas inlet valve, flow controller, process gas branch and output are sequentially installed in the fixed plate.The utility model solves the problem that deposition gas and etching gas are difficult to quickly switch and accurately control in quick alternate process.

The embodiment of the present application provides a lifting smoke machine. The lifting smoke machine comprises a fan box, a smoke collecting box provided with a smoke collecting port, a lifting guide rail and a driving assembly, the smoke collecting box is connected to the fan box through the lifting guide rail, the smoke collecting box is liftable between a lifting position of hiding the smoke collecting port and a lowering position of exposing the smoke collecting port under the driving of the driving assembly, a first reinforcing rib is arranged on the sidewall of the fan box in a curved manner, a second reinforcing rib is arranged on the sidewall of the smoke collecting box in a curved manner, the lifting guide rail comprises a guide rail and a sliding connecting piece, and the reinforcing ribs can provide stable fixing surfaces for the guide rail and the sliding connecting piece. When the sliding connecting piece is slidingly connected to the guide rail, the two can be installed on the fixing surfaces with higher strength, the stability of sliding is improved, and the shaking and deviation phenomena in the sliding process are avoided. The noise caused by unstable lifting is avoided. The stability of lifting of the lifting smoke machine is improved. The user experience is improved.

The utility model relates to the technical field of ceramic tile transmission, and discloses a translation type elevator for ceramic tile transmission, which comprises a rack, a guide plate, an annular transmission component and a plurality of moving components, an annular rail is arranged on the vertical face of the rack, and an annular conveying assembly is installed in the annular rail and used for driving the multiple moving assemblies to move circularly along the annular rail. The guide plate is mounted on the rack and is provided with a guide rail; the guide rail is positioned behind the annular rail; the moving assembly comprises a fixing frame, a bracket, a first supporting part and at least three second supporting parts. The problems that when a conventional lifting device which moves in a reciprocating mode is used, the reciprocating speed is increased to improve the conveying efficiency, meanwhile, shaking of the device is inevitably large, the ceramic tile quality is affected, and the conveying efficiency is limited by inertia force and is difficult to further improve are solved.

The application relates to a positioning jig and a polishing assembly. The positioning jig comprises a plurality of support members, a plurality of mounting members and a plurality of limiting members. At least one side of the support member in the width direction is used for placing workpieces. The mounting members are connected to both sides of the support member in the thickness direction, and one mounting member is arranged between two adjacent support members. The mounting members comprise two first mounting members and one or more second mounting members. The limiting members connected to the second mounting members can limit two workpieces adjacent in the thickness direction of the support member. By arranging one mounting member between two support members, the first mounting members and the second mounting members can mount the limiting members for limiting the workpieces, and the limiting members on the second mounting members can simultaneously position two workpieces adjacent on the same side, thereby reducing the size of the mounting members and the limiting members in the thickness direction of the support member, reducing the distance between the two workpieces, and improving the processing efficiency.

The application provides a PCB integrated identification processing equipment. The PCB integrated identification processing equipment comprises a conveying line, a feeding module, a golden finger protection module, a laser module, a labeling module, a discharging module, and various processing modules arranged in sequence along the conveying line; the conveying line is used for conveying PCBs to various modules of the equipment for processing; the feeding module is used for storing and supplying materials of a previous station or stacking; the golden finger protection module is used for protecting the golden fingers of the PCBs; the laser module is used for laser-engraving a two-dimensional code on the PCB; the labeling module is used for attaching labels to the PCBs; and the discharging module is used for taking down and storing the processed PCBs. The various identification processing technologies are integrated into one, the equipment size is reduced, the distance between various process links is shortened, the continuity, completeness and production efficiency of the processing process are improved, production information can be immediately integrated and uploaded, the timeliness of production information is ensured, and quality traceability is achieved.

The invention belongs to the technical field of magnesium ion batteries, and particularly relates to an in-situ synthesized aqueous magnesium ion battery organic composite negative electrode material, a preparation method and a negative electrode. The negative electrode material provided by the invention is a negative electrode material PDBM (at) KB obtained by introducing a formaldehyde solution into a suspension liquid of 2, 5-dihydroxy-1, 4-benzoquinone and conductive carbon which are uniformly mixed, carrying out quinone-aldehyde condensation polymerization under the catalysis of glacial acetic acid and carrying out in-situ synthesis; meanwhile, the distribution of KB in the negative electrode material PDBM (at) KB is further improved through the technological means of ultrasonic dispersion, vacuum infiltration and the like, a rapid ion transmission channel is constructed, the utilization rate of PDBM active substances is remarkably increased, and the aqueous magnesium ion battery with the PDBM / KB as the negative electrode shows high capacity, long circulation, high rate performance and high power performance; therefore, the technical problem that an existing magnesium ion battery electrode material is low in performance is solved.

The utility model relates to a kind of packaging devices with multi-face heat dissipation function.The packaging devices with multi-face heat dissipation function include: substrate, including the front and back of opposite distribution along first direction;Chip, attached on the front of the substrate, the chip includes the first surface towards the substrate and the second surface opposite with the first surface along the first direction;Multi-face liquid cooling heat dissipation structure, including upper cover, lower support and heat dissipation channel, the upper cover is located above the chip along the first direction, the lower support is at least located in the side of the chip and vertically connected with the end of the upper cover, the upper cover, the lower support and the chip form the heat dissipation channel, the heat dissipation channel is used to accommodate cooling liquid.The utility model realizes the multi-face liquid cooling heat dissipation of chip, increases the heat dissipation area of chip, enhances the heat dissipation performance of chip.

This invention discloses a thread friction coefficient testing machine, including a test drive unit, a main base, a pad, and a detachable fixture. The fixture includes an assembly base, a clamping actuator with an anti-rotation groove, and a circumferential locking pin, the tail end of which protrudes from the base. When the threaded pair slips, the locking pin is removed and the clamping actuator is rotated from the outside, allowing the fixture, along with the internally jammed fasteners, to be removed as a whole without destructive operation. This design not only achieves non-destructive and rapid unloading of the threaded pair, but its protruding clamping end and axial adjustment hole also expand the equipment's ability to test the friction coefficient of short bolts, significantly improving the maintainability, operating efficiency, and testing applicability of the equipment.

The utility model discloses a high-efficiency photovoltaic module which comprises a first battery string, a second battery string, a third battery string, a fourth battery string, a fifth battery string, a sixth battery string, a seventh battery string, an eighth battery string, a ninth battery string, a tenth battery string, an eleventh battery string and a twelfth battery string which are formed by welding a plurality of battery pieces together through a plurality of welding strips. A first bus bar is welded to one side of the first battery string, one side of the third battery string, one side of the fifth battery string, one side of the seventh battery string, one side of the ninth battery string and one side of the eleventh battery string, a second bus bar is welded between the first battery string and the seventh battery string, a second bus bar is welded between the sixth battery string and the seventh battery string, and a third bus bar is welded between the second battery string and the eighth battery string. And a bus bar 3 is welded between the battery string 4 and the battery string 10, and the bus bar is overlapped with the battery pieces, so that the area occupied by the bus bar is reduced, and the conversion efficiency is improved.

The water treatment device comprises: a housing; a stack including a first electrode and a second electrode disposed to face the first electrode and configured to form an electric field with the first electrode, thereby separating ions contained in the fluid introduced into the case; and a pressure plate configured to divide an internal space of the case into a first internal space in which the stack is disposed and a second internal space, the pressure plate pressing the stack in a first direction, the first direction being a direction in which the first electrode and the second electrode are stacked, and the second direction being a direction in which the first electrode and the second electrode are stacked. Wherein the pressure plate is configured to move between a first position arranged to enable the pressure plate to press the stack after moving in a first direction and a second position spaced apart from the first position in a second direction opposite the first direction.

The utility model provides a multifunctional vehicle-mounted magnetic wireless charger, which relates to the technical field of magnetic wireless chargers, and comprises an adjusting mechanism, one side of the adjusting mechanism is provided with an auxiliary mechanism, the adjusting mechanism comprises a shell, the bottom end of the shell is provided with a bottom support, the bottom end of the shell is correspondingly contacted with the top end of the bottom support, and the bottom end of the shell is connected with the bottom end of the bottom support. A lead screw is arranged on the inner wall of the center of the bottom support, and the inner wall of the center of the bottom support is connected with the outer side of the lead screw in a penetrating and threaded mode. The screw rod is rotated and moves on the original basis by screwing the rotating handle, the top end of the screw rod is connected with the fixed disc, and the fixed disc is positioned at the center of the adsorption part, so that the height of the adsorption part in the shell is increased, and the distance between the adsorption part and the top side in the shell is shortened; therefore, the adsorption capacity of the mobile phone is improved, the mobile phone is immovable during jolting, the falling risk caused by vibration is fundamentally eradicated, and a safe driving environment is created for a driver.

The utility model discloses a color sorter shell sheet metal part machining and fixing structure which comprises a machining part, a fixing part and a fixing part, the machining part comprises a machining table and a rotating rod, and the rotating rod is rotationally connected in the machining table in a sleeved mode; the fixing part comprises a driven wheel, a fixing rod, a fixing disc, a supporting rod, a clamping plate, a rotating shaft, a sleeve plate, a telescopic air cylinder, a controller, an anti-skid pad and a moving rod; and the front end of the rotating rod is fixedly connected with a driven wheel. According to the clamping device, when the movable rod is pushed to move backwards through the telescopic air cylinder, the sleeve plate starts to rotate in the movable rod, meanwhile, the rotating shaft rotates and drives the front ends of the clamping plates to be close to each other, the distance between the two front clamping plates is shortened, and when the clamping pad abuts against the surface of a workpiece, clamping and fixing of a sheet metal part are completed; due to the fact that the contact area between the device and the sheet metal part is small, during machining, the frequency of direction adjustment of the sheet metal part can be reduced, and the working efficiency is improved.

The utility model discloses a line sweep light source of high heat dissipation performance relates to the technical field of detection light source. Line sweep light source of high heat dissipation performance includes base, light emitting component and heat dissipation component, base includes seat body, heat dissipation block and mounting block, seat body is provided with accommodating cavity, light emitting component and heat dissipation component, a plurality of mounting blocks are arranged along first horizontal direction interval arrangement setting, the second mouth is formed between adjacent mounting block and is defined, the first mouth is set up along the second horizontal direction through setting of heat dissipation block, and a plurality of first mouths are distributed along first horizontal direction interval, a plurality of heat dissipation blocks are arranged along second horizontal direction interval, the air between the adjacent two heat dissipation blocks can flow to the plurality of mounting blocks and the heat dissipation block adjacent to the plurality of mounting blocks through the first mouth, and then flows out from the second mouth, improve the flowability of air, reduce the distance required for the air between the adjacent two heat dissipation blocks to flow outward.

This utility model discloses a powder coating device for stainless steel welding wire, including a processing box with an inlet and an outlet at both ends. Two movable plates are connected to the processing box via an adjustment mechanism. The adjustment mechanism includes a fixed plate, a drive assembly, a bidirectional threaded rod, and a limiting rod. The fixed plate is fixedly installed inside the processing box, the limiting rod is fixedly connected between the fixed plates, the bidirectional threaded rod is rotatably connected to the fixed plate, the drive assembly is connected to the bidirectional threaded rod, and the bidirectional threaded rod is threadedly connected to the movable plates. Two powder coating brushes are engaged at one end of the two movable plates via a locking mechanism, and several powder spraying heads are installed at the other end of the movable plates. Each powder spraying head is connected to a powder spraying assembly. This utility model allows adjustment of the distance between the powder coating brushes and the spraying heads, solving the problem of uneven powder coating in traditional devices when dealing with welding wires of different diameters, and improving the uniformity and quality of powder coating.

The invention provides a wafer loading, overturning and soaking mechanism, which comprises a base provided with a box body mounting frame and a module supporting structure, and the module supporting structure is provided with a guide rail; the soaking box body is arranged on the box body mounting frame, and the soaking box body is used for containing soaking liquid; and the overturning module is arranged on the module supporting structure, the overturning module comprises an overturning device and a driving assembly, the overturning device is provided with a wafer clamping part, the wafer clamping part is used for bearing a wafer, and the driving assembly is in driving connection with the overturning device and is used for driving the overturning device to overturn and move up and down along the guide rail. According to the invention, the processing precision and the processing efficiency of the wafer can be obviously improved.

The utility model discloses an emergency unlocking device of drum washing machine and drum washing machine, wherein the drum washing machine comprises a washing machine box body, a self-throwing decoration piece is installed at the front middle position of the washing machine box body, a door lock pull ring is installed in the self-throwing decoration piece, a through hole is formed on the self-throwing decoration piece and at the position above the door lock pull ring, a door lock assembly is installed on the inner side surface of the washing machine box body and above the self-throwing decoration piece, the door lock assembly comprises a microswitch, a fine rope is connected to one end of the microswitch, and the other end of the fine rope is wound on the door lock pull ring after passing through the through hole. The emergency unlocking device of the drum washing machine of the utility model is installed in the self-throwing decoration piece, which is convenient for user operation and does not affect the overall appearance.

The application relates to the technical field of semiconductor laser packaging, in particular to a high-efficiency semiconductor laser packaging auxiliary device and a packaging method. The packaging auxiliary device comprises a cooler, a secondary heat sink, an integrated L-shaped electrode, a first insulating sheet and a second insulating sheet. The upper surface of the cooler is provided with a first groove for accommodating the secondary heat sink; the upper surface of the secondary heat sink is provided with a second groove, the second groove is provided with a plurality of third grooves which are arranged at intervals and parallel to each other, the bottom surface of the second groove between the adjacent third grooves is provided with a boss, and the two ends of the secondary heat sink are provided with openings which are arranged parallel to the second groove. The integrated L-shaped electrode is arranged on the cooler. The technical scheme of the application can effectively reduce the packaging difficulty of the semiconductor laser, improve the packaging efficiency and reduce the packaging cost.

The utility model provides a traditional chinese medicine decoction cold -stored dispensing vehicle, including the compartment type trolley body that bottom is provided with the travelling wheel, is evenly distributed and is opened with a plurality of passageway communication with its inner chamber in the both sides of trolley body, is inserted with the drawer for receiving traditional chinese medicine decoction on each passageway, each drawer can be opened individually, be provided with refrigerating plant in the inner chamber of trolley body, and refrigerating plant carries out refrigeration in the inner chamber of trolley body to the traditional chinese medicine decoction of receiving in the drawer of inserting each passageway carries out cold -stored, and the traditional chinese medicine decoction of different patients is separated and independently cold -stored with the drawer, and medical staff is convenient to take and issue, avoids a plurality of patient medicine mix and puts and appears to issue the error of medicine, when carrying out traditional chinese medicine decoction, medical staff can push trolley body and directly move to each ward, store and issue the medicine of multiple patients simultaneously, shorten the distance between with patient, can improve the efficiency of issue, make the medicine work more convenient and efficient, alleviate the work burden of medical staff.

This invention provides a double-defect type Bi 12 O 17 This paper describes the preparation method and application of Bi2 ultrathin nanosheet photocatalysts, belonging to the field of photocatalytic materials technology. The preparation method is as follows: Bi2 is prepared by reacting a strong base with BiCl3 under ultrasonic assistance. 12 O 17 Cl2 ultrathin nanosheet precursor; then the precursor is mixed with sodium borohydride and a sulfur source and ground to obtain the target catalyst. In Bi 12 O 17 Sulfur doping and oxygen vacancies are simultaneously introduced into Cl2 ultrathin nanosheets to construct a doped-vacancy dual-defect system. By comprehensively utilizing the synergistic enhancement effect of the dual defects, the bottleneck of single-defect modification is overcome, thereby achieving a comprehensive improvement in photocatalytic performance (light capture, charge separation, surface reaction, and stability). This invention features a simple process, low requirements for preparation conditions, and is easily achievable for mass production, demonstrating high practical value and application prospects.

The utility model discloses a sliding structure capable of running smoothly, which belongs to the technical field of automobile accessories and comprises a sliding groove, a sliding channel arranged along the length direction of the sliding groove is arranged in the sliding groove, a sliding seat and a screw rod for driving the sliding seat to translate along the sliding channel are arranged in the sliding channel, the top surface of the sliding seat is connected with a cantilever, and the cantilever is connected with the sliding groove. A guide rail is arranged on the inner wall of the sliding groove, a groove is formed in the sliding base, and the guide rail extends into the groove. According to the sliding structure which runs smoothly, the original large cylindrical sliding contact surface is changed into a small-area contact form that the sliding chute is matched with the sliding seat, so that the friction coefficient is greatly reduced.

The application discloses a small-sized circuit breaker clapping type electromagnetic system with high magnetic efficiency, which comprises a magnetic yoke, and a armature is arranged above the magnetic yoke; the armature comprises a shaft pin part and a magnetic concentration part, and a recess part is further arranged on the magnetic concentration part; wherein the recess part is recessed towards the magnetic yoke. In summary, without reducing the magnetic increase of the magnetic yoke to the static contact rod, the recess part is arranged in the normal working air gap path of the armature, the distance from the current conductor is reduced, the electromagnetic force is larger and more concentrated in the working air gap, the magnetic path surface is larger, the suction is sufficient under low current (such as 32A and below), the action is sensitive, the magnetic flux leakage is minimum, and the large current working condition is considered.

The utility model provides a kind of perforation guiding device, comprising: guiding mechanism, adsorption mechanism, lifting mechanism and moving mechanism;Guiding mechanism is located above second workpiece, and is equipped with guide slot;Adsorption mechanism is located above guiding mechanism, for adsorbing first workpiece;Lifting mechanism is used to drive adsorption mechanism to perform lifting action, to make first workpiece enter guide slot and through-hole;Moving mechanism is used to drive guiding mechanism to move, to make guide slot directly opposite through-hole, or make guiding mechanism avoid adsorption mechanism to descend.This utility model adsorbs first workpiece by adsorption mechanism, and provides accurate moving path for first workpiece by guide slot, so that first workpiece can accurately enter through-hole;By setting moving mechanism, guiding mechanism can be driven to exit above second workpiece after adsorption mechanism moves close to guiding mechanism and first workpiece enters through-hole, avoid interference between mechanisms, so that first workpiece obtains greater descending stroke to enter through-hole smoothly.

The utility model relates to the technical field of server heat dissipation, in particular to a heat dissipation type aluminum alloy plate assembly of a server, which comprises a box body, a sliding groove is arranged at the bottom end of the inner side of the box body, a heat dissipation fan mounting assembly is connected above the sliding groove in a sliding mode, and a limiting assembly is fixedly connected at the bottom end of the heat dissipation fan mounting assembly. Limiting balls are fixedly connected to the two sides of the inner wall of the sliding groove. The cooling fan mounting assembly comprises a base, mounting plates are hinged to the two sides of the top end of the base, embedding holes and fixing holes are formed in the outer surfaces of the mounting plates, and the rear end face of the base is rotationally connected with a wind direction adjusting plate through a damping shaft; according to the utility model, the position of the heat dissipation fan can be flexibly adjusted, circuit boards of different specifications can be accurately adapted, the distance between the heat dissipation fan and a heating source can be greatly shortened, the heat dissipation efficiency can be improved, the heat dissipation path can be optimized, the heat discharge can be accelerated, and the long-term stable operation of the assembly can be ensured.

The utility model relates to the technical field of hydraulic engineering and disclose river channel dredging and sewage device, including base, the surface sliding of base is provided with mobile seat and sliding seat, the surface of mobile seat is provided with motor, the surface of sliding seat is provided with impeller chamber, the side wall of sliding seat and same side mobile seat all are through pivot swing installation rotatory board, be provided with connecting portion between rotatory board, the lower surface of base and be located the fixed plate of the direct below of connecting portion, the surface of fixed plate is provided with stud, just the stud with connecting portion screw connection. The utility model can protect motor, make motor can be in the no load state and start, reduce the starting burden, improve the service life of motor.