78results about How to "Avoid transmission failure" patented technology

The present invention discloses methods and apparatuses for scheduling user equipment in a wireless communication system supporting dual connectivity, wherein the user equipment remains connected to both of two base stations in the dual connectivity, and the two base stations include a macro base station and a small base station, the method comprising: sending a dual connectivity setup request message from the macro base station to the small base station, wherein the dual connectivity setup request message comprises information related to user equipment capability, and the information is used by the small base station to perform resource schedule for the user equipment in the connectivity with the user equipment and enabling the macro base station to use the information to perform resource schedule for the user equipment in the connectivity with the user equipment. With the methods and apparatuses of the present invention, the resources may be reasonably allocated to the user equipment and the processing capability for the use equipment under the dual connectivity could be ensured.

The application provides a transmission opportunity control method. The transmission opportunity control method comprises the following steps: the access point transmits a first frame, wherein the first frame carries a TXOP transferring mandatory THE indication field; the THE indication field is a first value or a second value, wherein the first value is used for indicating a site of the access channel to transfer the held TXOP to the access point, and the second value is used for indicating that the site of the access channel transfers the held TXOP to the access point when the transfer condition is fulfilled; and a STA transfers the held TXOP to an AP; therefore, even if the AP does not obtain the channel through competitions, it can also be a TXOP holder through the transferring of the TXOP, thus, the TXOP holding probability of the AP is increased, therefore, the probability of the AP scheduling the STA is increased, and the resource utilization rate of the system can be improved.

The invention discloses a gear slot batched cleaning device and belongs to the field of mechanical machining. The gear slot batched cleaning device comprises a rack and a roller. The rack is internally provided with a motor, the rack is provided with a driving roller and a driven roller, the driving roller is connected with the motor, the roller is erected on the driving roller and the driven roller, and the inner wall of the roller is provided with a spiral flexible grinding body; and the rack is provided with a supporting frame, the supporting frame is connected with two material feeding plates parallel to each other, and the material feeding plates penetrate through the roller and are provided with material feeding shafts for supporting a gear. According to the gear slot batched cleaning device, the freedom degree of a helical gear is limited through the two parallel material feeding plates, and the spiral grinding body rolls continuously to grind and clean the gear slot of the helical gear; and meanwhile, the helical gear is conveyed and rolled, and the gear slot with the surface provided with radians and gradients of the gear is ground and cleaned. The gear slot batched cleaning device is mainly driven by the motor and supported by the rack and the material feeding plates, the work amount of workers is small, labor intensity is low, influences, on cleaning machining, of manpower are small, efficiency is higher, and the gear slot batched cleaning device is more suitable for batched treatment in industrial production.

The invention relates to a material extravehicular exposure apparatus. The apparatus comprises: a base; a test box detachably mounted on a locking and supporting mechanism; a rotary lifting device mounted in the middle of the base, connected with the locking and supporting mechanism and driving the locking and supporting mechanism to rotate and lift; a positioning device which is driven by the rotary lifting device to rotate and lift, can be elastically supported on the base and is used for detecting the position state of the rotary lifting device in the rotary lifting process; and an inspection mechanism installed on the base and capable of moving within a preset range in the circumferential direction of the base. The exposure device disclosed by the invention can provide extravehicular exposure resources for materials such as metal materials, non-metal materials, composite materials and the like, the on-orbit rapid replacement of a material exposure sample device is realized, closedprotection is provided for an exposure material, the surface appearance of the exposure material can be monitored in real time according to material exposure requirements or ground instructions, and data acquisition, transmission, on-orbit information management and the like of a material exposure experiment can be realized.

The invention discloses a milk collection device for energy plants and a collection method thereof. The milk collection device for energy plants comprises a fixture and a collection unit. A trunk is tied inside the fixture; one lateral surface of the trunk is provided with a milk outlet face; the fixture includes a first fixing segment, a second fixing segment, a third fixing segment, a fourth fixing segment, a fifth fixing segment, a sixth fixing segment and a collection unit mounting segment; both the outer end of the first fixing segment and the outer end of the second fixing segment are fixedly connected with fixing seats by welding. The milk collection device for energy plants has the advantages that the fixing seats are fixed just by rotating a rotary stem seat, and mounting firmnessand convenience are great; protective protrusions may play a role of fixation and can also ensure normal transmission of tree nutrients and water; guide plate A and guide plate B can cooperate to provide increased milk collection rate; the inner end of the collection box is attached to the trunk and may cooperate with a partition such that foreign impurities are avoided entering the collection box, causing milk contamination; the whole milk collection device can prevent contaminations by foreign impurities, is convenient to mount and has good collection convenience.

The invention relates to a single-speed electromagnetic fan clutch for cooling an automobile engine, and aims to provide an electromagnetic fan clutch which can lead a fan to run at full speed to cool under the condition that power is switched off suddenly. The electromagnetic fan clutch comprises a transmission shaft, a transmission disc, a fan fixing disc, a first transmission, a second transmission and a first electric control device, the transmission disc is fixedly mounted on the transmission shaft, the fan fixing disc is mounted on the transmission shaft via a first bearing, the second transmission is fixedly connected with the fan fixing disc, and when powered, the first electric control device drives the first transmission to lead the second transmission to be separated from the transmission disc; and when in power failure, the first electric control device drives the first transmission to lead the second transmission to be connected with the transmission disc. The invention further relates to a manufacturing method and a control method for the electromagnetic fan clutch.

The invention relates to a steel wire rope driving mechanism for optical inspection outside a material cabin and an exposure platform. The steel wire rope driving mechanism comprises a support; a guide rail, mounted on one side of the support; a steel wire rope tightening device, mounted on the other side of the support; a driving device, installed at the bottom of one side of the support, and thedriving end of the driving device being connected with a driving steel wire rope winding wheel; a steel wire rope idle wheel, mounted at the top of one side of the support; a steel wire rope, one endof the steel wire rope being connected to the driving steel wire rope winding wheel, and the other end of the steel wire rope being connected to the steel wire rope tightening device after being wound around the steel wire rope idle wheel; and a bearing plate used for mounting an optical inspection module, mounted on the guide rail in a sliding manner and connected to the steel wire rope. The invention provides a moving mechanism adapting to the space environment, the weight is reduced to the maximum extent, and the size is reduced. Meanwhile, the moving mechanism is convenient to install andoperate on the ground, reliability is high, the failure rate is small, uplink resources can be saved, and cost is saved.

The invention relates to a driving device for optical inspection outside a material cabin and an exposure platform. The driving device comprises a driving mechanism II, and a conical friction wheel isin splined connection with the output shaft of the driving mechanism II; a friction rod is in friction fit with the conical friction wheel; the conical peripheral side of the conical friction wheel abuts against the friction rod; a guide rail is parallel to the friction rod; a load spring sleeves the output shaft of the driving mechanism II and is clamped between the large head end of the conicalfriction wheel and the other end of a sliding block assembly; the bottom of ta support is installed on the driving mechanism II, a first guide rail perpendicular to the guide rail is installed on oneside of the support, a driving mechanism is installed at the bottom of one side of the support, the driving end of the driving mechanism is connected with a driving steel wire rope winding wheel, a steel wire rope idler is installed at the top of one side of the support, and a steel wire rope tightening device is installed on the other side of the support. The driving requirement of an optical inspection module under the special space environment effect can be met.

The invention relates to a material outboard annular inspection device with a cable arrangement function, and the device comprises an installation platform which is provided with a steel belt drivingmechanism, wherein the peripheral side of the installation platform is provided with an annular groove for accommodating a cable; an annular steel belt which is driven by the steel belt driving mechanism to do annular motion around the peripheral side of the mounting platform; an annular guide rail which is annularly arranged around the installation platform; a bearing sliding block which is usedfor bearing an annular inspection mechanism, is connected to the annular steel belt and is arranged on the annular guide rail in a sliding manner; and a cable telescopic device which is mounted on theinstallation platform, wherein a cable of the annular inspection mechanism is arranged along the annular groove and is connected with the cable telescopic device. The steel belt driving mechanism drives the annular steel belt to move in an annular mode and drives the annular inspection mechanism on the steel belt driving mechanism to perform annular inspection, and a cable on the annular inspection mechanism achieve synchronous take-up and pay-off under the action of the cable telescopic device. According to the invention, the cable telescopic device can follow the movement position of the annular inspection mechanism to release or withdraw the cable.

The invention provides an air guiding plate drive device which comprises a drive box, a push-out mechanism and a air guiding mechanism; the push-out mechanism comprises a connection rod assembly; the air guiding mechanism comprises a first air guiding drive assembly, a second air guiding drive assembly, a first transmission component, a second transmission component and an output component, and the output component is arranged at the head of the connection rod assembly; the first air guiding drive assembly is connected with the output component through the first transmission component and can drive the output component to rotate in one direction; the second drive assembly is connected with the output component through the second transmission component and can drive the output component to rotate in one direction. By means of the air guiding plate drive device, the problem that a compact structure and a reliable transmission portion of an existing air guiding plate push-out structure cannot be compatible is solved, the head size of the connection rod assembly is reduced, it is guaranteed that an air guiding plate drive structure is compact, and inefficient transmission is avoided. The invention furthermore provides a control method of the air guiding plate drive device and an air conditioner internal unit.

Disclosed are an efficient-type corn niblet powder-making and caking-making system and a corn cake preparing method. The efficient-type corn niblet powder-making and caking-making system comprises a winnowing machine, a magnetic separator, a crushing and skinning machine, a crushing mechanism and a milling mechanism which are arranged in a treatment workshop, further comprises a batching tank anda puffing machine which are arranged in a puffing workshop, and further comprises a feeding channel and a finished product temporary storage tank. The feeding channel is formed in a downward-inclinedmode from the position, located on the outer side of the treatment workshop, of the ground, extends into the treatment workshop, and is connected with the bottom end of a first elevator in the treatment workshop. The refining effect is achieved through multi-link screening and then conveying and a multi-stage grinding and screening mechanism, so that feeding, powder-making, puffing and dischargingare conducted in different workshops, feeding and discharging are convenient to operate, the situation that operators are in the treatment workshop with loud noise is avoided, mutual interference ofpowder-making and puffing processes is avoided, noise reduction treatment is further conducted on key equipment, air pipes and an elevator channel, and the structure of the connecting position of theair pipes is improved to solve the situation of outage retention.

The invention provides a mechanical sealing device, belongs to the technical field of sealing systems, and aims at solving the technical problems of short service life of a static ring, large influence of damaged static ring on sealing effect, and easily-failed rotating of a dynamic ring of the existing mechanical sealing device. The mechanical sealing device comprises a pump shaft; a pump cavity pressing cover, a static ring, a dynamic ring and an impeller are sequentially arranged on the pump shaft; two ends of the static ring are respectively connected with the pump cavity pressing cover and one end surface of the dynamic ring; a dynamic ring seat is arranged on the dynamic ring; two end surfaces of the static ring are processed by polishing; a static ring sleeve, which is clung to the outer sidewall of the static ring and the pump cavity pressing cover, is arranged between the static ring and the pump cavity pressing cover; a fastening device is arranged on the dynamic ring seat; one end of the fastening device is clung to the dynamic ring seat and while the other end of the fastening device is fixedly connected with the impeller; the dynamic ring is rotated together with the impeller through the fastening device. With the adoption of the mechanical sealing device, the service life of the static ring is prolonged, the sealing effect is ensured, the fastening device is arranged to prevent a spring bracket and the pump shaft from oppositely rotating to cause failed transmission of the dynamic ring.

The invention belongs to the technical field of shoe washing machines, and aims to solve the problem that when an existing shoe washing machine conducts driving by the adoption of a drive belt, driving easily fails since the tightness degree of the drive belt cannot be adjusted. The invention provides an adjusting mechanism used for a shoe washing machine and the shoe washing machine. The shoe washing machine comprises a wheel system assembly and a drive belt connected to the wheel system assembly, and comprises a tensioning component, and the tensioning component can adjust the tensioning degree of the drive belt. Through the tensioning component, the tensioning degree of the drive belt is adjusted, accordingly, the drive belt makes full contact with the wheel system assembly, the wheel system assembly can be always kept in a drive state, and it is avoided that after long-term usage, the drive belt becomes loose, and as a result the driving of the drive belt fails. In addition, underthe condition that the drive belt becomes loose, tensioning of the drive belt can be realized again only by adjusting the tensioning component, in this way, the service life of the drive belt is prolonged, and meanwhile inconvenience caused by repeated replacement of the drive belt is eliminated.

The invention relates to electric power overhaul safety protection, and discloses a grounding rod management method and system, which can timely recycle grounding rods on a working site, avoid power transmission faults and safety accidents caused by the fact that the grounding rods are omitted on the working site after field operation is finished, and are high in reliability. The method comprises the steps of determining position data of a high-voltage line of an operation section before maintenance operation is started, and setting an electronic fence of a working area of the corresponding operation section according to the position data of the high-voltage line; in the maintenance operation period, position data of a grounding rod are obtained, and the grounding rod comprises a first positioning unit; comparing the position data of the grounding rod with the electronic fence, and judging whether the grounding rod is in the electronic fence; and if the grounding rod is in the electronic fence during the maintenance operation and the grounding rod is still in the electronic fence after the maintenance operation is finished, sending an omission alarm signal to a background server and / or a mobile terminal corresponding to the maintenance operation.

The invention relates to a continuously variable transmission device. The continuously variable transmission device is provided with a power input shaft used for inputting power and a power output shaft used for outputting the power. An arbor wheel of the power input shaft is connected with an arbor wheel of the power output shaft through a set of steel balls, and when the angle and the position between the power input shaft and the power output shaft are changed, the output speed of the power output shaft is adjusted. Automatic pressurization devices are installed on the set of steel balls and are used for increasing the contact friction force between the steel balls and the arbor wheel of the power input shaft 1 as well as the arbor wheel of the power output shaft, and slipping in the transmission process is prevented. According to the continuously variable transmission device, the output rotation speed can be changed according to the input rotation speed under the condition that the angle and the position of the steel balls are changed, and the effect of continuously variable transmission is achieved. Most importantly, very small grooves are formed in transmission wheels, and the steel balls are in line contact with driving wheels and the driven wheels, so that transmission expiration is prevented to a great extent and the service life of a transmission is prolonged.

The invention relates to a data backup device based on distributed file data, and the device comprises: a local file storage module which is used for storing local file data; the blocking module that is used for carrying out blocking processing on local file data, respectively carrying out real-time detection on each file data block and determining the change of each file data block; the setting module that is used for setting attribute information of each file data block according to a detection result after the file data blocks are detected in real time in a detection period; and the cloud backup module that is used for storing the backup files of the local file storage module, determining the sequence of updating the backup files based on the attribute information, and realizing unification with local file data. According to the invention, the local file data is subjected to block processing, the change of the formed data blocks is detected, the data blocks which are not modified do not need to be modified, and the corresponding backup modification is carried out through the modified data blocks, so that the backup of mass file data is quicker, and the backup efficiency is improved.

The invention relates to the field of agricultural mechanical equipment, and in particular relates to a spraying vehicle with a liftable chassis. The chassis of the spraying vehicle with the liftablechassis is provided with four lifting mechanisms, and traveling wheels are separately arranged under the four lifting mechanisms. In the using process of the spraying vehicle provided by the invention, a height of the chassis is adjusted by the lifting mechanisms, so that the chassis is avoided from hitting and damaging crops in the spraying operation process, and the problem that a chassis of a current spraying vehicle with the liftable chassis easily hits and damages the crops during the operation is solved; and an engine located on the chassis is connected to the walking wheels through transmission chains, tensioning mechanisms can provide tension for the transmission chains when the chassis is lifted, so that the transmission chains are always in a tension state, and the chains are avoided from being loosened to result in transmission failure.

The invention provides a transmission control protocol TCP acceleration method and device, and belongs to the technical field of networks. The method is applied to first network equipment, the first network equipment supports double-end TCP acceleration and single-end TCP acceleration, and the method comprises the following steps: sending a double-end acceleration negotiation message to second network equipment; determining the TCP acceleration capability of the second network equipment according to whether the first network equipment receives the double-end acceleration confirmation message or not; when the second network equipment supports double-end TCP acceleration, carrying out double-end TCP acceleration on the TCP message sent to the second network equipment; and when the second network device does not support double-end TCP acceleration, performing single-end TCP acceleration on the TCP message sent to the second network device. The first network equipment can perform TCP acceleration on the TCP message according to the TCP acceleration capability of the second network device without manually deploying the TCP acceleration mode of the first network equipment, so that the TCP acceleration efficiency is improved.

The invention relates to a mutual-inspection-type exposure device outside a material cabin. The mutual-inspection-type exposure device includes an exposure device body I and an exposure device body IIwhich are arranged at intervals, both of the exposure device body I and the exposure device body II include force bearing mechanisms, bases and rotating mechanisms; a plurality of test boxes and optical inspection devices are installed on the force bearing mechanisms, the test boxes are arranged around the force bearing mechanisms correspondingly, the test boxes are correspondingly enclosed to form optical inspection channels communicating with the outsides of the force bearing mechanisms, and the optical inspection devices are installed in the optical inspection channels; the force bearing mechanisms are installed in the middles of the upper parts of the bases and can rotate relative to the bases; the rotating mechanisms are installed between the bases and the force bearing mechanisms for driving the force bearing mechanisms and the test boxes thereon as well as the optical inspection devices to rotate relative to the bases; and when the exposure device body I rotates, the optical inspection device on the exposure device body II performs optical inspection on the exposed surface of the test box on the exposure device body I. According to the mutual-inspection-type exposure device, the two exposure device bodies can be used to inspect each other.

The invention discloses a connecting device capable of quickly changing a working head. The connecting device is used for connecting with a working head (4) with inner bore convex ribs (8), and is characterized by comprising a fixed rotary sleeve (2) which can be inserted into the working head (4), and a driving shaft (1) which is used for sleeving into the fixed rotary sleeve (2); the outer wall of the fixed rotary sleeve (2) is provided with at least one slot capable of matching with the inner bore convex ribs (8), a radial through hole (2.5) is machined in the slot surface (2.1) of the corresponding slot, a locking member is movably assembled in the through hole (2.5); and a locking working face (1.2) and a release working face (1.1) are machined on the driving shaft (1). The connecting device has the benefits that motion association exists between a locking device and a machine during operation, and only in a locking state, the working head can be driven to work, thus fundamentally putting an end to the possibility of locking failure during operation.

The invention relates to a driving device for optical inspection outside a material cabin and an exposure platform. The driving device comprises a track for moving and walking of a steel belt, a driving friction wheel, a transmission friction wheel, a support, a steel wire rope and a bearing plate, wherein the steel belt is clamped between the driving friction wheel and the transmission friction wheel; a guide rail I perpendicular to the steel belt is installed on one side of the support, a driving mechanism is installed at the bottom of one side of the support, the driving end of the drivingmechanism is connected with a driving steel wire rope winding wheel, a steel wire rope idle wheel is installed at the top of one side of the support, and a steel wire rope tightening device is installed on the other side of the support; one end of the steel wire rope is connected to the driving steel wire rope winding wheel, and the other end is wound on the steel wire rope idle wheel and then connected to the steel wire rope tightening device; the bearing plate is used for mounting an optical inspection module, is installed on the guide rail I in a sliding manner and is connected to the steelwire rope. According to the invention, X-direction movement is achieved through steel belt driving, Y-axis movement is achieved through steel wire rope driving, and the driving requirement of the optical inspection module under the special space environment effect can be met.

The invention relates to a material outboard annular inspection driving mechanism and an annular inspection mechanism. The annular inspection driving mechanism comprises an installation platform whichis provided with a steel belt driving mechanism, an annular steel belt which is annularly arranged on the periphery of the installation platform and annularly moves around the peripheral side of theinstallation platform under the driving of the steel belt driving mechanism, an annular guide rail which is annularly arranged on the periphery of the installation platform and located on the peripheral side of the annular steel belt, and a bearing sliding block which is used for bearing the annular inspection device, is connected to the annular steel belt and is arranged on the annular guide railin a sliding manner. The annular inspection device can be driven to do annular motion around the installation platform, and the surface topography motion of an exposed material on the installation platform can be monitored in real time; an annular steel belt is used for transmission, the weight is light, the occupied space is small, and the weight and space resources are greatly saved; the steelbelt is low in thermal expansion coefficient, has the characteristic of small deformation quantity at high and low temperatures, can well adapt to the material outboard complex space environment, andavoids the situation of transmission jamming or failure.

The invention discloses a three-stage power transmission system of a vertical circulating stereo garage. The transmission system comprises a main motor, a gear motor, a second-stage transmission shaftand a third-stage transmission shaft, wherein the second-stage transmission shaft is arranged between the gear motor and the third-stage transmission shaft and is parallel to a power output shaft ofthe gear motor and the third-stage transmission shaft; the gear motor is in transmission connection with the second-stage transmission shaft through a chain; the second-stage transmission shaft is intransmission connection with the third-stage transmission shaft through a chain; and a circulating chain driving wheel is arranged on the third-stage transmission shaft. According to the three-stage power transmission system, the stress condition of the transmission shaft can be effectively improved, and the operation safety and stability of equipment are more reliably guaranteed.

The invention discloses a crankshaft and flywheel set. The crankshaft and flywheel set comprises a crankshaft, a flywheel and a rotor rotating magnetic field assembly, a belt wheel is mounted at one end of the crankshaft, the flywheel is mounted on the other end of the crankshaft, the rotor rotating magnetic field assembly comprises a magnet and a coupling coil, the magnet and the coupling coil are arranged on the flywheel to serve as a generator rotor, along with the flywheel rotation, a rotating magnetic field is formed, a generator stator coil matched with the generator rotor cuts a magnetic line to generate induction current, according to the crankshaft and flywheel set, the magnet and the coupling coil are arranged on the flywheel to serves as the generator rotor to form the rotatingmagnetic field, the generator stator coil cuts the magnetic line to generate the induction current, through a rectifier, power is output, the flywheel of the crankshaft and flywheel set serves as thegenerator rotor, a transmission system of an engine and a generator in a hybrid system can be omitted, and power losses and faults of the transmission aspect can be avoided.

The invention provides a transmission connecting structure for a magnet motor and a belt pulley. An intercalation structure which is coaxial with a central shaft, is positioned at the periphery of an extending section and is opened in the top-end plane of the extending section, is arranged on the central shaft extending section of the magnet motor; the belt pulley is ring-shaped, and tightly surrounds the periphery of the top end of the extending section; an intercalation structure which penetrates through the belt pulley is arranged on a position, which corresponds to the intercalation structure of the extending section, of the inner side surface of the belt pulley; one fixed part is inserted into a complete intercalation structure jointed by the extending section and the belt pulley, so that the fixed part, the extending section and the belt pulley are integrally connected; and the central shaft extending section, the belt pulley and the fixed part are connected through a circlip. According to the transmission connecting structure disclosed by the invention, the circlip is used for connecting and fixing a magnet motor center shaft, a fixed key and the belt pulley, so that power is guaranteed to be transmitted to the magnet motor; meanwhile, the fixed key is in tight contact with the central shaft, so that transmission failure caused by transmission efficiency reduction or loosening of the fixed key is avoided, normal uniform-speed rotation of the magnet motor is kept, and the final purpose of providing stable magnetic fields needed for a PVD process is finally achieved.

The invention discloses a flower and plant seedling cultivating frame convenient for adjusting. The flower and plant seedling cultivating frame comprises a bottom base. The upper surface of the bottombase is fixedly connected with two symmetrical support rods. The upper part of one side face, mutually adjacent to each other, of each of the support rods is provided with a through channel. A seedling cultivating plate matched with the through channels is placed above the bottom base. The left and right ends of the seedling cultivating plate are locked and connected in two through channels. Themiddle of the bottom wall in each of the through channels is provided with a groove. The interior of each of the grooves is locked and connected with a rack matched with the groove. The upper surfacesof two racks pass through two grooves and are extended to the interior of the through channels, and the upper surfaces of the two racks are fixedly connected with the bottom face of the seedling cultivating plate. The flower and plant seedling cultivating frame convenient for adjusting is capable of, through installing the racks, and under the combined action of a gear, a transmission shaft, a first driving wheel, a conveying belt, a second driving wheel and a speed reducing motor, enabling the seedling cultivating plate to be upwards and downwards moved, and solving a problem that an interlayer height can be adjusted only if the traditional seedling cultivating plate is detached and assembled.

In order to be able to arrange a master module (M), slave modules (S) and conventional plug modules (K) in a freely configurable manner in a modular plug system, according to the invention, a modularframe (22) is provided with a circuit board (1) which includes at least one continuous conductor path and preferably more than one connection pad.

The invention relates to a driving device used for a hollow louver. The driving device includes a shell and a concave pulley, wherein the shell is arranged on the outer side of the driving device, theconcave pulley includes a pulley body arranged in the middle of the concave pulley and baffles arranged at the two ends of the pulley body, and the concave pulley can be rotatably installed on the inside wall of the shell. According to the driving device, the concave pulley is used, the baffles arranged on the two sides of the pulley body can effectively avoid that a pull rope in transmission come into a gap between the pulley and the side wall in operation, and transmission failure is prevented.

A railway contact net electric spark identification system based on ultraviolet light detection comprises a light receiving unit, wherein the light receiving unit is connected with a signal processingunit, the signal processing unit is connected with an information storage unit and comprises a filter and amplification module, an A / D sampling module and a microprocessor, and the information storage unit stores acquired voltage and current information. A railway contact net electric spark identification method comprises the steps that 1, high-voltage discharge is detected by detecting ultraviolet light in a solar blind area; 2, a negative pulse signal is reversely amplified to obtain a forward current pulse, a negative current pulse is subjected to filtering processing, and an obtained waveform is adjusted; 3, after background light is filter out, the discharging degree is judged, unit time based integration is conducted on digital quantity, and a received signal is analyzed and received by using a computer; 4, a discharge phenomenon is detected, a spark discharge position point is determined, a contact net spark discharge spectrogram is obtained, the extracted range of corresponding characteristic frequency components is divided into frequency bands, and discharge characteristics are extracted according to the proportion of each frequency band, and the discharge position and intensity of a contact net can be accurately detected.