225results about How to "Reliable disassembly" patented technology

The invention relates to a large-grid wide-area asynchronous control method, which belongs to the field of emergency control of power systems. The method comprises the following steps of (1): real-time state computation of a main network frame of a wide area measurement system (WAMS)-based power grid, which is to eliminate the false and retain the truth through data pre-treatment, inhibit or eliminate noises to the largest extent, and highlight the useful information of the wide area measurement system in a grid dynamic process to provide characteristic quantity for stable analysis and control; (2) real-time analysis of stability of grid power angle, which is to detect and predict asynchronous process of the system based on the synchronous phasor of the integral main power grid by combining a system analysis method, and find out an asynchronous section in space; and (3) presentation of a coordinate control strategy for asynchronous disconnection, which is to present a backup disconnection control measure when the asynchronous section deviates to the section which is not controlled by disconnection and guarantee reliable disconnection when the large-grid becomes asynchronous. According to the method, a WAMS-based wide area asynchronous emergency control is provided, the running state of the power system can be monitored and controlled in real time, possible power angle instability of the power system can be predicted, the chain reactions of large-grid resistance is guaranteed, and influences of grid accidents on national economy and people's live are avoided.

The invention provides a power grid out-of-step disconnecting control system and method, and belongs to the field of power system stability control. Based on out-of-step judgment of a regional power grid, an out-of-step situation of the regional power grid is judged step by step, so that the invention provides more comprehensive consideration; based on out-of-step judgment of a large-area power grid, the influence of out-of-step of the regional power grid is considered, and the possibility of power failure of a local power grid is reduced; furthermore, the out-of-step judgment method provided by the invention effectively locates a line where an out-of-step center is located, and performs a disconnecting operation on the line where the out-of-step center is located; when a system generates serious out-of-step oscillation, the power grid is quickly disconnected, the disconnecting measure is quickly and reasonably utilized in a first period of the out-of-step, and the out-of-step fault is prevented from spreading over the whole power grid; by inducing a wide-area measurement technique and utilizing a PMU device, electric data of the power grid is measured in real time on-line, communication is performed by utilizing the optical fiber communication technology, and a main grid control center judges the out-of-step of the power grid, controls the whole power grid and ensures that the power grid is reliably disconnected when the power grid occurs the out-of-step.

The invention discloses a tight connecting structure. The tight connecting structure comprises a main body, a secondary body and a tight connecting module; the tight connecting module includes a screw rod, a locking nut and a stop sleeve; a taking structure for taking out the stop sleeve is arranged on the hole wall of a first stop hole and/or the stop sleeve; the screw rod penetrates through the main body and the secondary body to be in threaded connection with the locking nut; the stop sleeve is mounted out of the locking nut and in the first stop hole, and is axially limited in the first stop hole; a first stop part at the outer periphery of the locking nut is matched with a second stop part on the wall of a stop through hole of the stop sleeve to restrain rotation of the locking nut corresponding to the stop sleeve; a third stop part at the outer periphery of the stop sleeve and a fourth stop part on the wall of a first stop hole are matched to restrain rotation of the stop sleeve corresponding to the secondary body; and the screw rod, the locking nut and the secondary body and the main body are mounted in a manner of not rotating, the tight connecting structure has the following advantages: the locking nut cannot reversely rotate to loosen corresponding to the screw rod; and the stop sleeve can be taken out from the first stop hole conveniently, quickly and reliably.

The invention provides a rapid locking device capable of shortening time for mounting and dismounting desktop equipment on a mounting base on a platform. The rapid locking device is provided with a foundation bolt which is provided with a stepped shaft and provided with a T-shaped head at one end, a locking base cylinder assembled in a foundation bolt sleeve is provided with lockhole chutes vertical to each other, a handle capable of driving the foundation bolt to veer penetrates through assembly holes arranged in a middle cylinder and the foundation bolt in the locking base, to be connected in series with the middle cylinder, and the foundation bolt is in contact connection with a U-shaped thick retaining ring through the upper end of the locking base, inserts into the cylinder of an upper sleeve and is reset through an axial travel offsetting spring arranged between the middle cylinder and a lower end platform of a lower end cover. The invention provides a new locking mode capable of rapidly mounting and dismounting for the modular development of the miniature desktop equipment on the platform, the locking mechanism can substitute for a bolt fixing and connecting mode adopted by a portion of desktop equipment and solve the problem that traditional desktop equipment can not be rapidly mounted and positioned on the platform.

The invention discloses a high-precision stamping die assembly with a safety protection function. The high-precision stamping die assembly has reliable hydraulic power and has the reliable safety protection function, and meanwhile a male die can be replaced. The high-precision stamping die assembly comprises a rack, an upper die assembly and a lower die assembly, wherein the upper die assembly and the lower die assembly are arranged on the rack and opposite to each other, and the upper die assembly is located above the lower die assembly. The upper die assembly is driven through a hydraulic oil cylinder assembly to ascend and descend. The upper die assembly and the lower die assembly are provided with the male die and a female die which are matched with each other respectively. The upper die assembly further comprises a male die assembly fixed to the bottom face of a lifting board. The male die assembly comprises a fixing board fixedly connected to the bottom face of the lifting board. The fixing board is provided with a male die fixing base connection hole. A male die fixing base is connected into the male die fixing base connection hole. An axial connection hole is formed in the male die fixing base. A male die mechanism is connected into the axial connection hole in a matched manner. The side wall of the female die of the lower die assembly is provided with an infrared transmitting head and an infrared receiving head.

The invention discloses an agricultural information acquisition device convenient to install. The device comprises a supporting seat, a rainfall sensor, a solar cell panel, a storage battery, a communication module, a temperature and humidity sensor, a wind direction sensor and an illumination sensor; the lower surface of the supporting seat is fixedly connected with a moving structure; a groove is formed in the middle of the lower surface of the supporting seat; motors are fixedly connected to the two sides of the upper surface of the inner cavity of the groove; and limiting blocks are fixedly connected to the positions, corresponding to the motors, of the two side walls of an inner cavity of the groove. The output end of each motor is fixedly connected with a first lead screw, the otherend of the first lead screw is rotatably connected with a bearing seat, the bearing seat is fixedly connected with the inner side wall of the groove, the first lead screw is slidably connected with asliding plate, the lower surface of the sliding plate is fixedly connected with an inserting rod, and the upper surface of the supporting seat is fixedly connected with a supporting rod. The acquisition device is simple in structure, convenient to use, simple to mount and dismount, convenient to maintain, convenient to move and fix, convenient to transfer a test sample plot and good in stormy waveresistance.

The invention provides a detachable five star foot rest with split convenience. The foot rest comprises a foot rest seat and five support arms, the front side of a raised head of the foot rest is provided at least one socket, and the socket comprises two edge slots which are parallelly separated, and a connecting slot for completely communicating the two edge slots from up ends to bottom ends; an end face at the inner end of the support arm is provided with an inserting column for inserting and installing into the socket; the inserting column and the upper surface of the support arm form a step, and a boss which is stuck to the upper surface of the support arm is arranged on the front side of the raised head on the upper part of the socket; a hook buckle and a hook groove which are buckled together and installed in place are arranged between the bottom surface of the boss and the upper surface of the support arm, so that the support arms and the foot rest seat can be conveniently and easily mounted and dismounted; the socket which comprises two edge slots and the connecting slot can prevent shaking and loosening, and at the same time the hook buckle and the hook groove can prevent falling off, so that the connection of the five star foot rest has firm and reliable connection, risk of falling off which is generated in the usage process is avoided; the foot rest has the advantages of reasonable structure, easy dismounting, and lower production cost.

The invention relates to a deep groove ball bearing retainer dismantling method. A retainer of a deep groove ball bearing is positioned and supported by means of an auxiliary bearing dismantling tool so as to be prevented from rotating and then is placed on a working table of a drilling machine, drilling cuttings on the heads of all rivets of the retainer of the deep groove ball bearing are removed by means of a drill bit of the drilling machine, and thus two retainer bodies of the retainer of the deep groove ball bearing are separated to complete dismantling. The deep groove ball bearing retainer dismantling method has the advantages that dismantling operation is easy and convenient, all components of the bearing are prevented from being damaged, accurate bearing disassembly analysis is achieved, and reutilization of qualified components of the bearing is achieved.

The invention provides a new energy automobile battery installing structure which is applied to the technical field of new energy automobile parts. The central portion of an automobile chassis bottomplate (1) of the new energy automobile battery installing structure is provided with a protruding cavity (2) which protrudes upwards, a telescoping part I (5) is installed on a cavity side face platepart I (4) of the protruding cavity (2), and a telescoping rod I (6) is installed on the telescoping part I (5); a telescoping part II (7) is installed on a cavity side face plate part II (11) of theprotruding cavity (2), and a telescoping rod II (8) is installed on the telescoping part II (7); and a recessed groove I (9) is formed in one side face of a battery body (3), and a recessed groove II(10) is formed in the other side of the battery body (3). The new energy automobile battery installing structure is simple in structure and low in cost, assembling and disassembling of a battery and the automobile chassis bottom plate are extremely reliable, and the battery can be effectively prevented from being collided when an automobile is subjected to a traffic accident.

The invention discloses a puller with an assembly type crossbeam, relates to a puller of detaching parts and aims to solve the problems that an existing puller for detaching wheel type parts is complicated in processing technology, high in cost, low in matching accuracy and limited in application range. The puller comprises the crossbeam, a jack or lead screw, two pulling claws, two second fastening parts and two first fastening parts. The tail of each pulling claw is provided with a circular through hole along the thickness direction. The crossbeam comprises a cylinder and two connecting shafts, the jack or lead screw is in threaded connection with a first center threaded through hole of the cylinder, the two connecting shafts are penetratingly arranged on the side wall of the cylinder along the radial direction, each connecting shaft is detachably connected with the cylinder via one of the first fastening parts, the outer side of each connecting shaft is provided with a positioning groove, and the cylinder is in threaded connection with a second center threaded through holes on the pulling claws. The puller with the assembly type crossbeam is used for detaching small, large or heavy wheel type parts.

The invention discloses a vehicle wheel which comprises a hub, a spoke, a braking element and fastening connection components, wherein each fastening connection component is composed of a screw rod and a rotation retaining sleeve; the screw rods fix the hub, the spoke and the braking element together; the spoke is provided with first rotation retaining holes; a fetching structure used for fetching each rotation retaining sleeve which is installed out of a locking nut and in the corresponding first rotation retaining hole is arranged on the wall of each first rotation retaining hole and/or each rotation retaining sleeve; each rotation retaining sleeve is installed out of a rotation retaining holding part of the corresponding screw rod and in the corresponding first rotation retaining hole; a third rotation retaining part of a first rotation retaining through hole of each rotation retaining sleeve is matched with a fourth rotation retaining part arranged outsides the corresponding rotation retaining holding part to restrain rotation of the corresponding screw rod relative to a corresponding first rotation retaining sleeve; a second rotation retaining part arranged at the periphery of each rotation retaining sleeve is matched with a first rotation retaining part of the corresponding first rotation retaining hole to restrain rotation of the corresponding first rotation retaining sleeve relative to spoke; and the screw rods and the spoke are installed together without capability of rotation. The vehicle wheel has the advantages that a threaded connection pair cannot get loose due to reversed rotation, so that threaded connection is kept at a locking position which is initially needed and is reliable, and fetching of the rotation retaining sleeves is convenient and reliable.

The invention relates to a modern logistic circulation box which is characterized by comprising a tray bottom plate, four side wall plates and a cover plate, and sealing rubber strips are embedded in the joints of the plates of the box. When the plates are assembled into the circulation box, goods can be hermetically loaded in the box, so that the goods are prevented becoming damp; and when all the goods in the box are unloaded, the box can be disassembled into the tray bottom plate, the side wall plates and the cover plate, so that the box is easy to recover, utilize and transport and the transportation cost and the stacking space of the recovered empty box are reduced. The circulation box can achieve mechanical and automatic loading or unloading operation like a tray and can be stored by stacking; and the bottom plate of the circulation box can be independently used as the circulation tray. The goods are transported and circulated by the circulation box, so that the goods do not become damp; the box recovery cost is low; the automatic loading or unloading operation is easily carried out; and the box is quick, convenient and reliable to dismount, high in interchangeability, long in service life and low in rejection rate. In addition, the box is small in equipment investment, low in production cost and convenient and reliable to operate and use, and has a better industrial prospect.

The invention discloses an overhauling device for an automobile generator and an overhauling method of the overhauling device in the technical field of generator overhauling. The overhauling device comprises a base; a supporting seat is fixedly arranged on the upper side of the base; the supporting seat is movably sleeved with a rotatable supporting sleeve; a push-and-pull fixed mechanism is fixedly connected to the supporting seat; the push-and-pull fixed mechanism is provided with a rotation stopping rod capable of limiting rotation of the supporting seat; the supporting sleeve is connectedwith a rotatable transmission shaft; a clamping frame is fixedly connected to one end, extending out of the supporting sleeve, of the transmission shaft; two clamping mechanisms are connected to the clamping frame; the clamping mechanisms comprise clamping jaws capable of doing a reciprocating rectilinear motion; the two clamping jaws directly face each other; the upper side of the base is furtherprovided with a fixed seat; the fixed seat is provided with a pushing plate capable of doing the reciprocating rectilinear motion in a left-right direction; the clamping mechanisms are arranged between the pushing plate and the supporting sleeve; and in a height direction and a front-back direction, the pushing plate is arranged between the two clamping jaws. A rotor and a stator are not easy todamage when being disassembled, and the detection efficiency is high.

The invention relates to derusting equipment for derusting surfaces of sections in coal mine enterprises, and particularly discloses a derusting machine for edge beam sections of coal mine sealing-tape machines. The derusting machine comprises a support frame for fixing and supporting, a derusting actuating mechanism and a driving mechanism are disposed in the support frame, two slide rails are fixedly disposed at the bottom of the support frame, a crank transmission mechanism is fixed onto the support frame, is positioned at one ends of slide rails, and is connected with a driving motor by a belt pulley, the derusting actuating mechanism consists of a derusting tackle, derusters are arranged on the tackle, and a plurality of pulleys are arranged on two sides of the tackle and match with the slide rails on the support frame so as to slide on the slide rails. Reciprocating motion of the tackle is realized by the aid of the principle of a crank and slider mechanism, and an edge beam section derusting process is completed. The derusting machine is simple in integral structure, reliable in function and simple in installation and detachment, and components are reasonable and durable and are convenient in maintenance.