297results about How to "No failure" patented technology

A spacecraft posture fault tolerance control method of single gimbal control moment gyroscope groups includes the following steps that firstly, a kinetic equation and a kinematical equation are established when partial failures exist in the single gimbal control moment gyroscope groups (SGCMGs), wherein a coordinate system is defined, and a control system state equation is established; secondly, on the basis of in-orbit operation characteristics of a spacecraft, the spacecraft posture fault tolerance control method of the single gimbal control moment gyroscope groups is adopted; thirdly, the sliding mode control law is designed, wherein a sliding mode face is designed, the control law is primarily designed and the control law is improved. The method has the advantages that the designed control law is also applicable to fault tolerance control of aircrafts with flywheels as execution mechanisms; people do not need to learn about prior information of faults, real-time estimation of fault information and interference information is achieved through self-adaptation control, and fault time varying is allowed; the method is applicable to SGCMGs of any structure or partial failure modes of flywheels; the method is used in aircrafts of the SGCMGs, the rotation speed of a gyroscope frame serves as direct control amount, and the method conforms to engineering practice.

The invention relates to a ship cabin monitoring alarming system, which comprises a data acquisition part, a data transmission network subsystem, a monitoring subsystem, an extending alarming unit and a marine engineer calling unit, wherein the data acquisition part is respectively connected with the data transmission network subsystem and the monitoring subsystem; the data transmission network subsystem is respectively connected with the extending alarming unit and the marine engineer calling unit; the data transmission network subsystem adopts one or multiple communication ways to establish a data network; the extending alarming unit is formed by an extending alarming controller and an extending alarming terminal; the marine engineer calling unit is provided with a marine engineer calling device as the back-up. The ship cabin monitoring alarming system has the benefits that various operation parameters of a ship mainframe, an auxiliary machine and other power devices can be completed, including functions of integral remote measurement, automatic data processing, alarming, auxiliary control and the like of temperature, pressure, liquid level, flow, rotation speed and the like.

The invention discloses a method for testing potential safety risks of antiskid braking control boxes by the aid of quick temperature variation. The method includes determining high-temperature numerical values of an antiskid braking control box in quick temperature variation tests; determining low-temperature numerical values of the antiskid braking control box in the quick temperature variation tests; determining a quick temperature variation rate; determining working currents applied to the antiskid braking control box in test procedures and determining temperature holding durations of the antiskid braking control box under high-temperature and low-temperature conditions; establishing a quick temperature variation test profile according to a determined high temperature of a test chamber, a determined low temperature of the test chamber and a determined temperature variation rate of the test chamber; performing five cycle quick temperature variation tests according to the established test profile; comprehensively applying an antiskid braking working current to truly stimulate potential failure risks of the antiskid braking control box. The method has the advantages that the comprehensive environmental test chamber is utilized, the temperatures are accessorily controlled via liquid nitrogen, the potential failure risks of the antiskid braking control box during temperature variation can be stimulated within two days, and accordingly purposes of improving the development efficiency, saving energy and reducing consumption are achieved.

The invention discloses an electromagnetic clamp. The electromagnetic clamp comprises a base seat, wherein a left clamping portion and a right clamping portion which are connected together in separable mode are oppositely arranged on the base seat, a containing space which contains a work piece is formed after the left clamping portion and the right clamping portion are connected together, the left clamping portion is connected with the base seat in detachable mode, the right clamping portion is connected with the base seat in sliding mode, the left clamping portion and the right clamping portion are both provided with cavities, controllers are arranged in the cavities, a first electromagnet is arranged in the cavity of the left clamping portion, a second electromagnet is arranged in the cavity of the right clamping portion, winding directions of coils of the first electromagnet and the second electromagnet are opposite, the first electromagnet and the second electromagnet are both connected with the controllers, and the controllers are electrically connected with a power source. The electromagnetic clamp can be used in individual product production and large batch production, avoids repeated actions of drawing lines and aligning, improves production efficiency, and guarantees quality of the work piece.

The invention relates to a flexible display panel and a display device. The flexible display panel comprises a main display area and a foldable display area which are arranged on a flexible substrate,wherein multiple first pixel units are arranged in the main display area, multiple second pixel units are arranged in the foldable display area, and each first pixel unit include multiple first sub-pixel areas, namely a light-emitting electrode, a light-emitting structure layer and a pixel circuit. Each second pixel comprises multiple sub-pixel areas, namely a light-emitting electrode and a light-emitting structure layer. In the flexible display panel, due to the fact that a pixel circuit corresponding to each light-emitting electrode of the foldable display area is not arranged in the foldable display area but is arranged in the main display area, the pixel circuits of the main display area and all light-emitting electrodes located in the main display area and all light-emitting electrodes located in the foldable display area have one-to-one correspondence relation. Therefore, when the display panel is folded in the foldable display area, the problems of invalid pixel circuits and poor display are not produced.

The invention provides a data on-line migration method and device for updating applications in a network platform in order to solve the problem that services fail to be executed in the prior art. The method includes the steps that at the first stage of updating, a new version application and an old version application are run simultaneously, and the new version application and the old version application have access to an old database in the running process; the first stage of updating is finished, data in the old database are all synchronized to a new database, the second stage of updating is carried out, the new version application and the old version application are run simultaneously, the new version application has access to the new database in the running process, and the old version application has access to the old database; the second stage of updating is finished, the third step stage of updating is carried out, the new version application and the old version application are run simultaneously, and the new version application and the old version application have access to the new database in the running process; when the third stage of updating is finished, the new version application is run, and the new version application has access to the new database in the running process.

The invention relates to a method and a device for preparing and forming a micro composite material. The device consists of an Nd:YAG laser, a reflector, a lens, a restraint layer, a single-dimension mobile platform, a micro die, a three-dimension mobile worktable, a three-dimension mobile platform controller, an L-shaped base and a computer. The method for the synchronous realization of material composite and micro forming comprises: pulsed laser is used for driving a metal foil plate to move at high speed; the metal foil plate impacts a base foil plate in the micro die at high speed after moving a certain distance; the high temperature and high pressure generated in the impact surface can realize the composite connection between the metal foil plate and the base foil plate; the connected metal foil plate and base foil plate have certain impulse and compress to the direction of the die; owing to the limitation of the die, the shape of the micro die can be duplicated, thus realizing the synchronization of composite material production and micro forming. The method and the device have the advantages of reasonable design, simple process, good consistency, and being applicable to mass production.

The invention relates to a composite ceramic resistor and a manufacture method thereof, belonging to the field of power electronics. The manufacture method of the composite ceramic resistor is suitable for a breaker switch-on resistor, a high-pressure pulse line, a laser, a particle accelerator, and the like. The composite ceramic resistor is manufactured by adopting bauxite, kaolin, talc powder and carbon as main materials through ball-milling, mixing with water and a binding agent, rotting, curing, granulating, compression moulding for forming a raw blank, sintering and metal electrode coating. The composite ceramic resistor comprises the following raw materials in percentage by weight: 50-70 percent of bauxite, 10-40 percent of kaolin, 1-10 percent of talc powder, 1-15 percent of carbon, 1-3 percent of binding agent and 4-8 percent of water.

The invention discloses a simply constructed heat transfer device for stand-alone radiating of a space vehicle, which comprises an outer stuck heat pipe [5], a heat end heat-expansion plate [3], a cold end heat-expansion plate [7], a radiator [8], a heat end cover plate [2] and a cold end cover plate [6], wherein the outer stuck heat pipe [5] transmits the heat of the stand-alone [1] to the radiator [8]; the heat end cover plate [2] and the cold end cover plate [6] are used for fixing the outer stuck heat pipe [5]; and the heat end heat-expansion plate [3] and the cold end heat-expansion plate [7] are used for enhancing the heat transfer effect of the outer stuck heat pipe [5]. According to the invention, the problem of radiating an efficient heat transfer channel of the stand-alone of the space vehicle is solved, and the beneficial effects such as low cost, high reliability, good heat transfer effect and the like, are achieved.

The invention discloses an OLED screen punching method, which comprises the steps of forming a backboard layer, and forming a light absorption layer on the backboard layer, wherein the light absorption layer is specifically arranged in a punching area; forming an OLED layer on the backboard layer, wherein the OLED layer covers the light absorption layer; illuminating the OLED layer until the OLEDlayer arranged above the light absorption layer is evaporated; and conducting cutting and drilling in the punching area. According to the technical scheme provided by the embodiment of the invention,the light absorption layer is arranged at the punching position, the OLED layer material in the screen punching area is removed through illumination, the periphery of the punching area is covered by the light absorption layer, so that the water and oxygen permeation path of the punching area is blocked through the light absorption layer, oxygen or moisture cannot enter or spread through the OLED layer, the condition of component failure does not occur, and the punching scheme is simple to operate and relatively low in cost.

The invention provides an ionosphere propagation characteristic based phase diameter disturbance suppression method and belongs to the radar signal processing technical field. The problem that the suppression effect is limited and even fails when the disturbance suppression is performed on the ionosphere phase diameter by the existing ionosphere phase diameter disturbance suppression method from the perspective of signal processing is solved. According to the technical scheme, the Ionosphere propagation characteristic based phase diameter disturbance suppression method comprises performing the hybrid modeling on an international reference ionosphere model and an MQP (Multi-Quasi Parabolic) model to obtain an ionosphere space reflection time-varying parameter model; deriving a phase path calculation analytic expression of the MQP model by a ray tracing method on the basis of the electron concentration profile of ionosphere space reflection time-varying parameter model and obtaining change values of a phase path along with the time after the repeated operation at different moments; performing the suppression on the back wave spectrum with the ionosphere phase diameter disturbance through a phase disturbance compensation curve obtained through fitting by a least square method and finally obtaining the suppressed ionosphere back wave spectrum. The Ionosphere propagation characteristic based phase diameter disturbance suppression method is suitable for the processing on the broadening sea clutter spectrum with the ionosphere phase diameter disturbance under a high-frequency sky wave radar.

The invention discloses a full-automatic pocket patching machine and accordingly the working efficiency is high, the degree of automation is high, and sewn finished products comprise double sides and multiple colors. The full-automatic pocket patching machine comprises a base station (1) and a material folding mechanism (2), a feeding mechanism (3), a sewing mechanism (4) and a controller (5) which are arranged on the base station (1); the sewing mechanism (4) comprises a sewing table, a head, at least two working needles, a plurality of pressing feet, an automatic needle replacement module and a pressing foot lifting mechanism; the working needles are arranged on the head; the pressing feet are matched with the working needles respectively; the pressing foot lifting mechanism is matched with the pressing feet; the sewing table is provided with at least two spindles which are matched with the working needles respectively. The full-automatic pocket patching machine is applied to the technical field of automatic sewing equipment.

The invention discloses an inflatable butterfly valve. The inflatable butterfly valve is provided with a valve seat, a valve shaft installed on the valve seat and a butterfly plate component. The valve seat is provided with a medium channel provided with a central line in the axial direction of the valve seat. The valve shaft is provided with a rotation axis which extends and passes through the central line. The butterfly plate component is fixed to the valve shaft and arranged inside the medium channel. An extension portion with a valve shaft installation channel arranged internally is arranged above the valve seat. A pneumatic actuator installation flange is arranged at the free end of the extension portion and provided with a pneumatic actuator, and a driving shaft of the pneumatic actuator is connected with the valve shaft. An annular embedding body made of an elastic material is embedded in the inner wall of the valve seat in the circumferential direction and provided with two embedded ends and a deformable portion, the two embedded ends are embedded into the valve seat, the deformable portion is arranged between the embedded ends and forms an inflatable cavity with the inner wall of the valve seat, and the inflatable cavity is communicated with an air inflation hole formed in the valve body. An air inflation hole of the pneumatic actuator and an air inflation hole of the valve body are connected with an external air source through magnetic valves. The inflatable butterfly valve has the advantages of being small in friction and torque, resistant to abrasion, long in service life and suitable for the field of the chemical industry.

The embodiment of an air conditioner and a control method and device of an electronic expansion valve of an indoor unit, and relates to the technical field of air conditioners. The air conditioner andthe control method and device are used for reducing the output power of a compressor of an outdoor unit after a certain indoor unit in a VRF air conditioning system stops running, and energy is saved. The method comprises the steps that when the indoor unit is in a heating mode, if the indoor unit stops running, the inlet temperature and the outlet temperature of a heat exchanger of the indoor unit are acquired; the inlet temperature is the temperature generated when a refrigerant flows into the heat exchanger of the indoor unit, and the outlet temperature is the temperature that the refrigerant flows out of the heat exchanger of the indoor unit; the difference value between the outlet temperature and the inlet temperature is calculated, and the change amount of the electronic expansion valve is calculated according to the difference value; whether the difference value is within the preset temperature range is judged; and if the difference value is not within the preset temperature range, the opening degree of the electronic expansion valve is adjusted according to the change amount. The air conditioner and the control method and device are applied to the VRF air conditioning system.

The invention relates to a PVC / TPU (polyvinyl chloride / thermoplastic polyurethane) oil-resistant flame-retardant thermoplastic elastomer for new energy automobile charging pile cables. The invention is characterized in that the thermoplastic elastomer is formed by mixing a PVC flame-retardant master batch and modified TPU and carrying out granulation, wherein the mass ratio of the PVC flame-retardant master batch to the modified TPU is 1:1-3:7. The PVC master batch comprises the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin, 70-85 parts of plasticizer, 3-6 parts of stabilizer, 5-10 parts of lubricant, 150-250 parts of inorganic filler, 150-250 parts of flame retardant and 3-7 parts of antioxidant. The plasticizer is composed of a low-viscosity polyester plasticizer and a super-cold-resistant solid plasticizer in a mass ratio of 15:1-11:3. The cable material has the advantages of favorable large-section extrudability, smooth and particle-free surface, favorable wear resistance, favorable oil resistance and favorable flame retardancy, and can operate in an outdoor harsh environment for a long time without failures.

The invention discloses a ventilating heat-dissipating support structure used for an ultrahigh geothermal tunnel. The ventilating heat-dissipating support structure comprises an initial-stage supportstructure, a waterproof layer structure, a heat insulating layer structure, a secondary lining structure, a ventilating heat-dissipating structure, a structure temperature measuring system and a transverse connecting tube, wherein the initial-stage support structure comprises an initial spraying structure and a re-spraying structure; the ventilating heat-dissipating structure is positioned in theinitial spraying structure; and the transverse connecting tube is used for connecting the ventilating heat-dissipating structure to a gas exchange system in the tunnel. According to the ventilating heat-dissipating support structure disclosed by the invention, the ventilating heat-dissipating structure is arranged in the initial-stage support structure, sub-grade type circulating ventilation is performed to realize air exchange between high-temperature gas inside the ventilating heat-dissipating structure and normal-temperature gas in the tunnel, good heat-dissipating effect is achieved, adverse effect, on the support structure, of high ground temperature is overcome, and integral durability of the funnel support structure under long-term high-temperature action is improved. The inventionfurther provides a using method of the ventilating heat-dissipating support structure used for the ultrahigh geothermal tunnel.

This invention discloses a method for testing short messages, first of all a test device stores a test short message and a short message expected to be replied, a base station sends the test message to a mobile network device to transfer it to a service end device to generate reply message according to the content of the test message and sends it to the device of the mobile network, which transfers the reply to the base station, said test device compares the reply with the expected one to generate a comparison result and store it. This invention also discloses a system for testing short messages and a network device.

The invention discloses a method for preparing a functional gradient titanium alloy strip. The method comprises the following steps: driving a raw material strip to move at a constant speed; electrically connecting a high energy pulse power supply with a moving strip by virtue of two immovable electric contact devices which are arranged along the strip moving direction at an interval, intermittently introducing high energy pulse current with the frequency of 60-760Hz, the voltage of 10-600V and the pulse width of 10-6000mu s into the strip, and performing high energy pulse treatment on the strip; cutting the treated strip, thereby obtaining the functional gradient titanium alloy strip. The invention also provides a functional gradient TC4 titanium alloy strip which is prepared from a TC4 titanium alloy strip with single mechanical property by adopting the preparation method, and the elasticity modulus of the strip continuously changes along the length direction of the strip. The preparation process is simple and low in cost, online continuous production can be realized, and an oxidation phenomenon on the strip surface is avoided in the preparation process. The titanium alloy strip does not cause the failure and breakage phenomena and is good in mechanical properties.

The present invention relates to the technical field of filter, and especially discloses an oil filter with a stably and reliably positioned filter component. The oil filter comprises a shell, a front end cover, a rear end cover and a filter component. The front end cover is provided with an inlet joint; the rear end cover is provided with an outlet joint; and end face of an outlet end of the filter component abuts against an inner side surface of the rear end cover; and the outlet joint and the outlet of the filter component form a socket cooperation. The oil filter can realize stability and reliability of positioning of the filter component; deflection is not likely to happen; and during a welding process of the front end cover and the shell, failure of the filter component caused by local high temperature and heating will not happen. A second supporting seat between the outlet joint and the filter component, and a welding process on the second supporting seat and the outlet joint are canceled, so as to realize simple process, simple structure of the oil filter and low manufacturing cost. The invention also discloses a refrigerating system with the oil filter.

The invention discloses a machining method for a gear shaft in an angle steering gear assembly. The machining method comprises the following machining steps: (1) selecting a 20CrMnTi round material; (2) turning an end face A and drilling a central hole in the end face A; (3) rough-turning outer circles at positions N, C, D, E, F, G and B and controlling the length; (4) milling a spline at the position G; (5) machining R at the position M; (6) finish-turning the outer circles at the positions N, C, D, E and F; (7) turning the other end face and a drilling a central hole; (8) milling teeth at the position N; (9) rough-turning and finish-turning the position B of a small outer circle; (10) milling the outer circles at the positions C, E and B; (11) carburizing and quenching at the position N, and performing high-frequency quenching at the outer circles G, C, E and B; (12) inspecting and warehousing. According to the machining method, the spiral direction of the gear shaft is consistent with the rotation direction of input power, the product quality and strength are improved, and the period for replacing the assembly is prolonged for automobile users. The anti-fatigue and torsional strength requirements are met. The cost of the user is greatly reduced.

The invention discloses a wireless reconnection marshalling method based on digital station communication. According to the wireless reconnection marshalling method based on the digital station communication, wireless reconnection is conducted between a main control locomotive and one or more controlled locomotives through digital station communication, all the locomotives are marshaled during the wireless reconnection, and the marshalling comprises the steps that (1) the controlled locomotives are marshaled, information relevant to marshalling of the controlled locomotives is input into a man-machine interface IDU of a wireless reconnection system by controlled locomotive drivers, conformation is conducted, and then preparation of marshalling of the controlled locomotives is completed; (2) the main control locomotive is marshaled, information relevant to marshalling of the main control locomotive is input into the man-machine interface IDU of the wireless reconnection system by a main control locomotive driver, and confirmation is conducted; (3) the main control locomotive driver sends a marshalling command on the man-machine interface IDU of the wireless reconnection system, and marshalling information of the main control locomotive and the controlled locomotives is checked; (3.1) marshalling reorganization is conducted; (3.2) marshalling testing is conducted; (3.3) completion of marshalling is conducted; (4) marshalling is completed. The wireless reconnection marshalling method based on the digital station communication has the advantages that the principle is simple, operation is easy and convenient, the method is easy to realize, and the reliability is high.

The invention provides a water power spiral-flow type ballast water electrolysis disinfection device for a ballast water monitoring system. The water power spiral-flow type ballast water electrolysis disinfection device has the advantages of high treatment efficiency, large capacity, continuous operation, regardless density of entered particulates, no stoppage, simple and convenient flow control mode, simple and easy maintenance and low cost. The water power spiral-flow type ballast water electrolysis disinfection device comprises a shell, a ballast water inlet and a ballast outlet, and is characterized in that a vortex finder is arranged in the shell; an electrode configured for the vortex finder and an electrode arranged on the inner wall of the shell form an anode and a cathode; the lower end of the electrode configured for the vortex finder is provided with a through hole; and the electrode configured for the vortex finder is hollow, and is communicated with the ballast water outlet through a liquid outlet pipeline.

The invention provides a technological process for treating a casing surface and belongs to the technical field of production and manufacture of casting parts. According to the technological process, industrial alcohol is added to an alcohol-based tellurium powder coating before painting the alcohol-based tellurium powder coating on a sand core surface; the alcohol-based tellurium powder coating and the industrial alcohol are prepared into a painting liquid with a baume degree of 29 to 31; the tellurium in the painting liquid accounts for 4 to 8% of the total weight of the painting liquid; while being painted on the sand core surface, the painting liquid is stirred at every 2 to 5 minutes. The technological process is improved in concentration ratio of the painting liquid, design of a casting sand mould, usage of an adhering preventing sand coating, casting temperature and setting of temperature holding time, so that a coating formed by painting the painting liquid is stable in performance and free of failure and falling off, a phenomenon that the adhering sand is sintered in an inner cavity of a casting water jacket is avoided, and the leakage rate is greatly decreased.

The invention discloses an array damping-ball shock absorption device. The array damping-ball shock absorption device comprises a vertically arranged shock absorption main body and a shock absorption shaft matched with the shock absorption main body, wherein the shock absorption main body comprises an outer sleeve with both a top cover and an outer sleeve base, and the shock absorption shaft and the outer sleeve are coaxially arranged; an upper space and a lower space of the outer sleeve, separated by a lug boss arranged at one end of the shock absorption shaft, are filled with damping balls respectively; and coaxial connecting pieces are arranged on the outer wall of the upper end of the outer sleeve. According to the shock absorption device, by virtue of the extruding plastic deformation and mutual rubbing effects between the balls, the energy dissipation effect of the shock absorption device is improved, and accordingly, the shock absorption performance of the shock absorption device can be improved.

The invention provides a bearing bush and a process thereof for spraying MoS2 on an alloy layer for solving the problem that the alloy layer or the plated layer of the bearing bush peels off frequently. The bearing bush comprises a steel backing layer and the alloy layer fixedly arranged. The alloy layer is provided with a spraying layer fixed with the alloy layer. The alloy layer is one of an aluminum alloy layer or a copper-lead alloy. The spraying layer comprises a PI (Polyimide) resin layer, a MoS2 layer and a PAR (Parylene) lubricating coating sequentially arranged. The PI resin layer is contacted with the alloy layer. The bearing bush can effectively improve the dry grinding resistance, the anti-occlusion performance, the corrosion resistance and the wear resistance through the MoS2 layer by arranging the spraying layer on the alloy layer, the problem that the inner surface of the bearing bush in the installation and use process is scratched is solved, and the service lives of the bearing bush and lubricating oil in the bearing bush are prolonged. The bearing bush is good in practicality, and the whole manufacturing process of the bearing bush is safe and environment-friendly, so that the environmental pollution can be reduced.

The invention discloses a composite strand tapered anchoring steel strand finished product cable, which comprises a cable body and two anchoring ends positioned on two ends of the cable body, wherein each anchoring end comprises an anchoring and clamping section and a sealing antiseptic section; each anchoring and clamping section comprises an end cover, a clamping piece, a wire splitting anchor plate, an anchor cup, an extension cylinder and a restriction ring; each wire splitting anchor plate is a cone with an external taper; the inner cavity of each anchor cup and the inner hole of each extension cylinder are both inner taper holes; each single steel strand of the steel strand finished product cable body is clamped on the wire splitting anchor plate by the camping piece; each wire splitting anchor plate is positioned in the inner taper hole of each anchor cup to be tightly cooperated with the inner taper hole of each anchor cup so as to form a positioning wedge-shaped anchoring structure; each extension cylinder is filled with epoxy iron sand to form a taper-shaped body which performs an auxiliary anchoring function on the steel strand finished product cable; and each sealing antiseptic section comprises a sealing cylinder, an O-shaped sealing ring and a gland. The finished cable has the advantages of high stress fatigue resistance, good shock resistance, reliable anchoring performance, compact anchorage structure and convenience in manufacture installation and anchorage change construction and is suitable for the bridge inhaul cable under the high-fatigue stress state.

The present invention discloses a method for centrally storing and using user data. A universal service template is configured for the same class user, and the universal data of the same class users are stored in the corresponding universal service templates which are then stored in a HSS (home subscriber server); when an AS (application server) needs to read the universal data of a user, if the AS supports the characteristics of the universal service template and contains the corresponding universal service template, then the identifier of the universal service template of the user is obtained from the HSS; if the AS does not support the characteristics of the universal service template or does not contain the corresponding universal service template, then the HSS obtains the content of the universal service template of the user. The present invention utilizes the universal service template to realize the centralized storage of user data on the HSS, thus avoiding data redundancy and maintenance difficulties. Moreover, the present invention enables AS to obtain user data via the Sh interface related messages, and reduces network transmission flow in maximum.

The invention provides a pin-type gripper device for clamping and transporting soft objects. The device is composed of the following parts: a central cylinder unit comprising a piston with a conical body at the end; and a pair of slide components which are obliquely arranged along the left and right sides of the conical body in a face-to-face manner and are spread like a skirt. A pin for insertion into an object is mounted to the ends of the slide components. The device of the invention is capable of controlling the two slide components simultaneously using only one cylinder unit. Therefore, compared with a conventional device needing two cylinders and with complex design, the device of the invention is simpler and more economical in terms of structure and control.