574 results about "Separated state" patented technology

The disclosure relates to the technical field of anti-icing and de-icing of an overhead transmission line or a railway contact system, and provides a mechanical anti-icing and de-icing device fixedly installed on the overhead transmission line or the railway contact system. The device comprises a base, an electric driving assembly, a weight block and a potential energy module comprising an elastic element. The electric driving assembly comprises a clutch mechanism and a motor. When the clutch mechanism is in an engaging state, the electric driving assembly drives the weight block to generate displacement relative to the base, and when the clutch mechanism is in a separation state, the electric driving assembly cuts off driving to the weight block. When the clutch mechanism is engaged, the potential energy module is used for accumulating potential energy when the weight block generates displacement relative to the base; and when the clutch mechanism is separated, a driving force of the electric driving assembly on the weight block is cut off, the potential energy contained in the potential energy module is rapidly released, so that the weight block moves quickly, thus causing the whole gravity center of the device to suddenly change, forming vibration to be transmitted to the overhead transmission line, so that the icing is removed.

The utility model relates to the technical field of electrical switches, in particular to an opening and closing device of a pole-mounted switch, which comprises a shell, a sliding rod, a crankshaft and a connecting rod. The linkage control device further comprises a driving mechanism, and the driving mechanism can drive the crankshaft to swing in a limited mode so as to drive the sliding rod to be switched between the upper limit position and the lower limit position, so that the pole columns are switched between the closed state and the separated state, and the linkage control device has the advantages that linkage control over the multiple pole columns is achieved through a mechanical structure based on the crank connecting rod principle; and the reliability and the convenience of opening and closing control of the pole are greatly improved. Due to the fact that linkage control is achieved, it can be guaranteed that the pole columns can be switched to the needed working state at the same time, and the use reliability and the on-off accuracy of the pole column module are greatly improved.

The invention discloses a wellhead device for gas production and a control system thereof.The wellhead device comprises a gas mine connecting bridge assembly and a gas connecting output mechanism, a sealing lifting sleeve is arranged above the gas mine connecting bridge assembly in a sleeved mode, and a sleeve sealing component is arranged at the top end of the sealing lifting sleeve and connected with a bolt in a sleeved mode; and the top end of the sleeve sealing component is provided with an air pipe head sealing kit which is sleeved by a bolt. According to the device, a structure with a separated state in a lining valve shell is mainly utilized to enable a powerful hydraulic telescopic frame on a top connecting frame to enable a semi-arc plug to ascend and descend, in the ascending and descending operation process, airflow is output through the lining valve shell, the airflow can be in press fit with an adaptive telescopic rod and a stress push plug, and the safety of the device is improved. And the output direction of the lining valve shell can achieve the effect of effectively adjusting the direction, so that when the gas transmission two-outlet valve pipe and the gas transmission three-outlet valve pipe are used for outputting, the effect of continuous working can still be achieved when equipment needs to be maintained.

The invention relates to the technical field of AMT gearbox control, in particular to an AMT gearbox control method, system and equipment in a braking state and a medium, and the method comprises the steps that when a vehicle is in a braking deceleration state, the stepping duration of a brake pedal, the actual vehicle speed, the actual acceleration of the vehicle and the rotating speed of an engine are obtained; whether the braking intention of the driver is emergency braking or stable braking is judged based on the stepping duration of the brake pedal and the actual acceleration of the vehicle; and based on the braking intention, the gear of the AMT gearbox and the separation state of a clutch are controlled till braking is finished. Wherein the current gear is maintained during emergency braking, and a clutch is controlled to be separated according to an engine rotating speed threshold value; during stable braking, after the rotating speed of the engine meets the condition, whether downshift is conducted or not is judged according to the actual vehicle speed, and a clutch is controlled to be separated. The brake intention of a driver can be accurately recognized, differential control is executed, and therefore the brake efficiency is effectively improved, engine flameout is prevented, and the driving smoothness is improved.

The utility model discloses a clutch component, a transmission device, box equipment and a refrigerator. The clutch component comprises a driving piece, a driven piece, a transmission assembly and a driver. The transmission assembly comprises a support, a sun gear rotationally arranged on the support and a planet gear set rotationally arranged on the support, the support is provided with an annular inner gear, the sun gear is in transmission connection with the driving part, and the planet gear set comprises a rotating part in transmission connection with the driven part and a planet gear rotationally arranged on the rotating part; and the planetary gear is meshed with the annular inner gear and the sun gear. The driver comprises a limiting part capable of moving relative to the support, and the limiting part has a limiting state in rotation stopping fit with the support and a separation state separated from the support. According to the clutch component, the intelligent opening and closing requirement of the refrigerator can be met, manual opening and closing operation of a user is not interfered, meanwhile, the structure is simple, and the production cost can be reduced.

The rotating shuttle comprises a rotating shuttle frame, a rotating shuttle race, a rotating shuttle plate and a thread guide plate, the rotating shuttle plate and the thread guide plate are fixed to the side edge of the rotating shuttle race through fastening screws respectively, the rotating shuttle plate comprises the pressing piece tip and a shuttle plate body which are in a separated state, the pressing piece tip comprises a top plate, a side plate and a tip end, a U-shaped groove is formed in the side plate, and the top plate is connected with the top plate. The U-shaped groove comprises an inclined section, the symmetrical line of the inclined section points to the tip end, an included angle alpha is formed between the symmetrical line of the inclined section and the horizontal line, the two ends of the inclined section are arranged at the outer end point of the middle portion and the tail portion respectively, screw holes are formed in the side edges, and the U-shaped groove is fixedly connected with the screw holes through positioning bolts. The part, making contact with the top plate, of the top face of the side edge is provided with a cut short face, the cut short face makes contact with the bottom face of the top plate to form a receding gap, and when the positioning bolt is arranged at the outer end point, the cut short face is matched with the top plate through the receding gap. The rotating shuttle disclosed by the utility model can adapt to different thread-off duration requirements.

The utility model discloses a clutch, a transmission device, box equipment and a refrigerator. The clutch comprises a driving piece, a driven piece and a transmission assembly. The transmission assembly comprises a matching part, a clutch part and an electromagnetic coil, the matching part is in transmission connection with one of the driving part and the driven part, the clutch part is in transmission connection with the other one of the driving part and the driven part, and the clutch part can stretch out and draw back in the rotation axis direction of the driving part; the clutch piece has a transmission state in transmission fit with the matching piece and a separation state separated from the matching piece, and the clutch piece can be reset to the separation state. The electromagnetic coil is arranged on the outer side of the matching piece in a sleeving mode and can generate magnetic attraction force for driving the clutch piece to be in transmission fit with the matching piece after being powered on. According to the clutch, the transmission device can be applied to meet the intelligent opening and closing requirements of the refrigerator, manual opening and closing operation of a user is not interfered, meanwhile, the structure is simple, and the production cost can be reduced.

The utility model relates to the technical field of chuck driving, in particular to a rotary force transmission device and an electric clamping system. The clamping jaw is provided with a lead screw, a lead screw nut, a first clutch mechanism and a second clutch mechanism, the lead screw nut is matched with the lead screw, and front-back translation of the lead screw nut is used for driving the clamping jaw to clamp or loosen; the combination and separation states of the first clutch mechanism and the second clutch mechanism are mutually independent; the first clutch mechanism is in transmission connection with the screw rod when being in a combined state, and is separated from the screw rod when being in a separated state; the combined state and the separated state of the second clutch mechanism are used for locking the clamping state of the clamping jaw or enabling the clamping jaw to be freely opened and closed. The clamping jaw has the effect of no force release in the clamping process, when the first clutch mechanism is in the separation state, the rotation of the machine tool spindle can drive the clamping jaw and a workpiece in the clamping jaw to rotate and machine, so that a rotating external cutter does not need to rotate and machine the workpiece, and the cost investment is reduced.

The utility model discloses an electric push rod which comprises a motor and a transmission mechanism. The screw rod is driven by the transmission mechanism to rotate, and the tubular telescopic component is driven by the rotation of the screw rod to do linear telescopic motion; the controller is used for controlling the motor; the electric push rod further comprises a clutch which is connected between the transmission mechanism and the lead screw and has a joint state used for keeping power transmission of the transmission mechanism and the lead screw and a separation state used for cutting off the power transmission of the transmission mechanism and the lead screw, and the lead screw is subjected to axial tension to enable the clutch to be switched into the separation state. And the Hall sensor is electrically connected to the controller and is used for detecting the rotary motion of the screw rod. When an object or a human body is clamped, the tubular telescopic component is prevented from clamping an obstacle again in a mode that the tubular telescopic component stops retracting and retreats, so that the safety is higher.

The utility model discloses a positioning device for mold processing detection, and relates to the technical field of mold detection. The device comprises a workbench, the top of the workbench is provided with a first displacement assembly and a second displacement assembly, the top of the first displacement assembly is provided with a lifting assembly, the top of the lifting assembly is provided with a rotating assembly, and the outer surface of the rotating assembly is fixedly connected with a clamping plate. The lifting assembly is connected with the rotating assembly, the lifting assembly is located on the lower portion in the normal state, the rotating assembly connected with the lifting assembly is in the separated state, the rotating assembly cannot drive the clamping plate to rotate, and the situation that a switch of the rotating assembly is touched by mistake is avoided; the lifting assembly is started firstly to drive the rotating assembly to move upwards so that the rotating assembly can be meshed, then the rotating assembly is started to drive the clamping plates to rotate, the angle of the mold between the clamping plates can be changed, and therefore the detector can detect the mold from different angles.

The invention discloses an air guide assembly and an air conditioner, the air guide assembly is used for being installed at an air outlet of the air conditioner, the air guide assembly comprises two rotatable air guide plates, the length directions of the two air guide plates are parallel, rotating shafts of the two air guide plates are coaxially arranged, and the axial direction of the rotating shafts is parallel to the length directions of the air guide plates; each air deflector is provided with a first side edge and a second side edge which are opposite in the width direction, the first side edges are located on the sides close to the rotating shaft, the first side edges of the two air deflectors can be switched between a lap joint state and a separation state, and in the separation state, the two air deflectors can provide different air guiding directions. According to the technical scheme, the air outlet direction of the air conditioner can be adjusted in a more diversified mode.

The charging port cover assembly comprises an outer cover and a dustproof cover, and the outer cover is hinged to a charging port of a vehicle and has an open state and a closed state relative to the charging port; the outer cover opens the charging port in an open state and covers the charging port in a closed state; the dustproof cover is detachably connected with a charging socket interface in the charging port and has a connection state and a separation state relative to the charging socket interface; the dustproof cover covers the charging socket interface in a connection state and opens the charging socket interface in a separation state; the outer cover is provided with a magnetic component, the dustproof cover is configured to be magnetically adsorbed, and the dustproof cover is suitable for being magnetically connected with the magnetic component after being detached and separated from the charging socket interface. The utility model further discloses a vehicle with the same. According to the scheme, the dustproof cover can be magnetically attracted, when a vehicle is charged, the dustproof cover can be magnetically attracted and fixed through the magnetic component arranged on the outer cover, the structure is simple, operation is convenient, the problem that the dustproof cover is inconvenient to take and place can be effectively solved, and the use experience of a user is improved.

The utility model discloses a clutch component, a transmission device, box equipment and a refrigerator. The clutch component comprises a driven piece and a clutch motor. The driven piece comprises an output part and a matching part connected with the output part; the clutch motor comprises a motor body and a rotating shaft at least partially exposed out of the motor body, the rotating shaft can move in the rotating axis direction of the rotating shaft and has a transmission state in transmission fit with the matching part and a separation state separated from the matching part, and the rotating shaft can reset to the separation state; when the clutch motor outputs power, the rotating shaft extends to a transmission state and drives the driven part to rotate; when the clutch motor stops outputting power, the rotating shaft is reset to the separation state, and the driven piece can rotate relative to the rotating shaft. According to the clutch component, the transmission device can be applied to meet the intelligent opening and closing requirement of the refrigerator, manual opening and closing operation of a user is not interfered, meanwhile, the structure is simple, and the production cost can be reduced.

The present application provides a switch cabinet, comprising: a cabinet body (10), comprising a main body (11) and a test door (12), wherein a first stop portion (121) is provided on the test door (12); a switch device (20); and a first interlocking assembly, comprising an operation structure (40), a second stop portion (50), and a first lifting / lowering structure (60), wherein at least part of the operation structure (40) is arranged in a liftable and lowerable mode to drive the first lifting / lowering structure (60) to lift / lower, and the first lifting / lowering structure (60) shields or provides clearance for a grounding operation hole (24) of the switch device (20); a fitting portion (61) of the first lifting / lowering structure (60) has a fitted state and a separated state; when the test door (12) is closed, the operation structure (40) is operated to drive the first lifting / lowering structure (60) to lower until the fitting portion (61) moves from the separated state to the fitted state, and the first lifting / lowering structure (60) provides clearance for the grounding operation hole (24), so that when the switch device (20) is grounded, the test door (12) cannot be opened.

The single-face wet clutch suitable for the narrow space comprises a clutch outer hub and a clutch inner hub, and a plurality of first clutch plates are arranged on the inner side of the clutch outer hub in a bonding mode; a plurality of second clutch plates are arranged on the inner side of the clutch inner hub in a bonding manner; the first clutch plate and the second clutch plate are oppositely arranged in a penetrating mode, and at least one of the contact faces of the first clutch plate and the second clutch plate is a curve face. The single-face clutch can shorten the axial size of the clutch assembly and is suitable for a narrow space with insufficient axial length; the bent clutch plates can enable the clutch plates to be distributed more evenly in the axial direction in the separation state, the combination and separation consistency of the clutch assembly is improved, meanwhile, the guide effect of oil in the radial outer side direction is improved through the bent clutch plates, the oil can be rapidly discharged, the lubricating and cooling effects can be rapidly achieved, the dragging torque is reduced, and the service life of the clutch assembly is prolonged. The product efficiency is improved.

The utility model discloses a box body device and a refrigerator. The box body device comprises a box body, a drawer and a transmission device. The box body is provided with a storage cavity. And the drawer is telescopically arranged in the storage cavity. The transmission device comprises a bearing part, a clutch, a motor and a telescopic assembly, the bearing part is fixed to the box body, the clutch has a transmission state and a separation state, the telescopic assembly comprises a rotating part rotationally arranged on the bearing part and a telescopic part matched with the rotating part, the telescopic part is in transmission connection with the drawer, and the motor is in transmission connection with the rotating part through the clutch. When the clutch is in a transmission state, the motor drives the rotating piece to rotate through the clutch so as to drive the drawer to move relative to the box body through the telescopic piece. And when the clutch is in a separation state, the motor and the telescopic assembly are disconnected from transmission. According to the box body equipment, the drawer can be automatically opened or closed, the reliability of manually opening and closing the drawer can be improved, and the use experience of a user can be improved.

The present application relates to a test fixture (100) and a device. The test fixture (100) comprises a bearing module (110), a pressure head module (120), a plurality of gas paths (121), and a sensing assembly (130), wherein the bearing module (110) is provided with a plurality of bearing areas (111) used for bearing a product to be tested; the pressure head module (120) has a pressed state of abutting against the bearing module (110) and a separated state of being separated from the bearing module (110); the plurality of gas paths (121) are arranged in at least one of the pressure head module (120) and the bearing module (110), and the plurality of gas paths (121) correspond to the plurality of bearing areas (111); and the arrangement of the sensing assembly (130) includes at least one of arranging the sensing assembly (130) in the bearing module (110) and arranging the sensing assembly (130) in the pressure head module (120).

The invention relates to the technical field of hybrid power vehicles, in particular to a clutch assembly for a hybrid power system, the hybrid power system, a control method and device of the hybrid power system, a vehicle and a storage medium. The clutch assembly includes: a power input shaft; the power input shaft is sleeved with the one-way clutch, the driving gear and the thrust transmission assembly. The one-way clutch comprises an inner ring assembly. The driving gear comprises a connecting shaft, and the outer side wall of the connecting shaft is used for being matched with the movable body of the inner ring assembly. The thrust transmission assembly is used for triggering the one-way clutch to rotate relative to the power input shaft so that the one-way clutch and the driving gear can be switched between the self-locking state and the separation state. The self-locking state means that the movable body abuts against the outer side wall of the connecting shaft; and the separation state means that a gap is formed between the movable body and the outer side wall of the connecting shaft. According to the clutch assembly disclosed by the invention, the required hydraulic pressure can be reduced, the switching efficiency of series-parallel connection modes is improved, the driving and riding comfort is improved, and the dragging and friction loss can be reduced.

The invention discloses a primary and secondary fusion pole-mounted circuit breaker and a use method thereof, and belongs to the technical field of circuit breakers, two handles are extruded to enable a sliding block to drive a clamping rod to be separated from a clamping groove so as to release the locking state between a moving contact and a static contact, a sliding column is supported through a first spring, the sliding column jacks up an isolation switch through a pin shaft, and the isolation switch is fixed through a second spring. When the isolating knife switch is not stressed, the moving contact and the static contact are always in a separated state, the isolating knife switch is prevented from deflecting to be in contact with the static contact due to external force, and when the isolating knife switch and the pillar insulation assembly are connected, the moving contact or the isolating knife switch is pressed down, and the moving contact is in close contact with the static contact, the static contact is in close contact with the pillar insulation assembly. The sliding block is supported through the elastic force of the second spring, so that the sliding block drives the clamping rod to be clamped into the clamping groove, the purpose of locking the static contact and the moving contact is achieved, the situation that the static contact and the moving contact are separated due to external force collision is prevented, and the working stability of the primary and secondary fusion pole-mounted circuit breaker is guaranteed.

The utility model provides an anti-overturning arm auxiliary closing mechanism of a seaborne launch rocket stabilizing device. The anti-overturning arm auxiliary closing mechanism comprises a first anti-overturning arm auxiliary closing mechanism and a second anti-overturning arm auxiliary closing mechanism. The first anti-overturning arm auxiliary closing mechanism and the second anti-overturning arm auxiliary closing mechanism are arranged at the bottom of a first anti-overturning device and the bottom of a second anti-overturning device of the seaborne launch rocket stabilizing device correspondingly. When the first anti-overturning device is in an overturning state, the first anti-overturning arm auxiliary closing mechanism adjusts the first anti-overturning device to be in a vertical state; and when the second anti-overturning device is in an overturning state, the second anti-overturning arm auxiliary closing mechanism adjusts the second anti-overturning device to be in a vertical state. According to the supporting device, in-place supporting of the marine launch rocket stabilizing device is achieved, the anti-overturning arm auxiliary closing mechanism and the anti-overturning arm of the marine launch rocket stabilizing device can be switched to be in a supporting state or a separation state, and the reliability, stability and safety of the marine launch rocket stabilizing device are improved.

The invention discloses a clamp and a packaging machine, which comprises a base, a turntable, a packaging bag and an actuator, and further comprises a fixed clamping plate, the movable clamping plate moves along an arc line and is in an attached or separated state with the fixed clamping plate, and the movable clamping plate is used for clamping the packaging bag in the attached state; the actuator can push the movable clamping plate to reciprocate; the transmission assembly converts linear motion of the actuator into arc motion of the movable clamping plate. The device has the beneficial effects that the structure of the movable clamping plate is re-designed, so that the movable clamping plate moves along an arc line to achieve opening and closing, the movable clamping plate can still avoid the moving path of the packaging bag when rotating by less than 90 degrees, the packaging bag can accurately move to the position between the movable clamping plate and the fixed clamping plate, and the placing accuracy of the packaging bag is improved; and through the design of the suction cups, the packaging bag can be sucked open while the packaging bag is fixed, so that the side wall of the packaging bag is in a separated state, and later feeding operation is facilitated.

The invention relates to the technical field of new energy vehicles, in particular to a battery bottom support, a separation system and a separation method. The battery bottom support comprises a frame assembly, a guide assembly, a locking assembly and a separation assembly. The guide assembly comprises a first guide unit and a second guide unit. The side, close to the extending end of the first guiding unit, of the frame assembly is a bearing face. The length of the first guide unit extending from the bearing surface is L3. The length of the second guide unit extending from the bearing surface is L1. L1 is smaller than L3. The locking assembly is connected with the first guiding unit. The separation assembly comprises a first separation unit and at least two second separation units. The battery bottom support comprises a locking state and a separating state. And the extending length of the second separating unit from the bearing surface is L2. And the length of the first separation unit extending out of the bearing surface is L4. Therefore, the problem of how to realize separation of the battery box by using smaller power is solved. L1 < L2 < L3 < L4.

The utility model provides a sliding uncovering assembly and a sealing tank, the sliding uncovering assembly comprises a tank body, a cover body and a sliding piece, and the tank body is used for containing objects; the cover body is arranged on one side of the tank body and can cover or be separated from the tank body; the sliding piece is connected to the cover body in a sliding manner; the sliding part drives the cover body to clamp or loosen the tank body in the sliding process, the cover body is clamped with the tank body so that the covering state of the cover body and the tank body can be maintained, the cover body loosens the tank body so that the separation state of the cover body and the tank body can be maintained, and the tank body can be opened by the cover body, so that the cover body can be opened from the tank body in a sliding mode; the cover body is prevented from being opened from the tank body in a turnover mode, and the operation convenience of the sliding cover opening assembly is improved.

The invention provides a grid type cabling rack welding tool which comprises a base and a tool supporting frame, a plurality of tool clamping structures are arranged on the tool supporting frame, each tool clamping structure comprises a clamping switching assembly and two bearing clamping assemblies, each bearing clamping assembly comprises a sliding seat part and a clamping part, and the sliding seat parts are arranged on the clamping switching assemblies. When the lower end of the clamping part is connected with the tool supporting frame, the lower end of the clamping part can limit the bearing clamping assembly to move on the tool supporting frame, and the clamping part is in a clamping state; when the lower end of the clamping part and the tool supporting frame are in a separated state, the lower end of the clamping part does not limit movement of the bearing and clamping assembly any more, and the clamping part is in a loosened state. The clamping switching assembly adjusts the connection state of the lower end of the clamping part and the tool supporting frame. The device is simple in structure, the reference main rod of the grid type cabling rack can be adjustably fixed, the stability of the reference main rod during auxiliary rod welding is guaranteed, the operation of adjusting the reference main rod is convenient and fast, and the welding efficiency is effectively improved.

According to the sorting method of the sorting trolley, a first gear and a driving gear mechanism are arranged on a first roller or a second roller, the first gear and the first roller or the second roller can rotate synchronously, and the driving gear mechanism is arranged at the sorting position; and when the sorting trolley moves to the driving gear mechanism, the driving gear of the driving gear mechanism can be meshed with the first gear for transmission, so that the trolley belt is driven to rotate or the driving gear mechanism can be separated from the first gear. The structure of the sorting trolley is greatly simplified, normal sorting can be achieved, the driving gear and the trolley belt are in a separated state, direct contact between the driving gear and the trolley belt is avoided, the service life of the trolley belt is prolonged, and the manufacturing cost and the maintenance cost are reduced.

The utility model provides a double-cylinder vertical zero-residual brake. The double-cylinder vertical zero-residual brake comprises a spline shaft, the spline shaft is sleeved with a base plate, friction plates, dual plates and cylinders, the two friction plates, the two dual plates and the two cylinders are symmetrically arranged on the two sides of the base plate, and the two ends of the spline shaft are each sleeved with a bearing and a retaining ring for a hole. When the piston of the double-cylinder vertical zero-residual brake is in zero air pressure, contact surfaces of the friction plates are in a separated state, zero-residual torque and zero-abrasion states are achieved, and the double-cylinder vertical zero-residual brake has the advantages of being simple and compact in structure, easy to manufacture, convenient to install, low in production cost, small in use noise, small in abrasion and long in service life.

The utility model relates to the technical field of walking mechanical equipment, and particularly discloses a cab turnover assembly and engineering mechanical equipment, when the engineering mechanical equipment provided with the cab turnover assembly is overhauled, a locking assembly is switched to a separation state, at the moment, a cab can be driven to rotate around a pivot shaft relative to a frame, and the cab is turned over. When the included angle between the cab and the frame is the first preset included angle, the fixing piece fixes the included angle between the cab and the frame to be the first preset included angle, and at the moment, a worker can overhaul equipment below the cab. The included angle between the cab and the frame is fixed to be the first preset included angle through the fixing piece, the cab is prevented from being excessively turned over or moving in the unexpected direction, and then the safety and stability of engineering mechanical equipment are improved.

The invention discloses a shield tail supporting and reinforcing device and method suitable for large-diameter shield synchronous pushing and splicing. The device comprises a shield body; the steel plate bundle has a supporting state and a separating state, the steel plate bundle is movably installed on the inner wall of the shield body to achieve switching between the supporting state and the separating state, and the steel plate bundle in the supporting state is used for making contact with the outer wall of the duct piece and supporting the duct piece; the steel plate bundle in the separated state is separated from the duct piece; the driving assembly is installed on the shield body and used for driving the steel plate bundle to move so as to achieve switching between the supporting state and the separating state. The shield construction continuity and efficiency can be improved, through the design of the steel plate bundles, the steel plate bundles can make contact with the outer wall of the duct piece in the supporting state, higher supporting force is provided, and the stability and safety of the duct piece are ensured. The steel plate bundle has a supporting state and a separating state and can be flexibly switched according to construction requirements, so that the shield tunneling machine can keep the optimal working state in different construction stages.

The invention discloses a pipe body connecting device used for connecting a first pipe body and a second pipe body, and discloses a storage rack of the pipe body connecting device and the pipe body connecting device, and the pipe body connecting device comprises a connecting assembly used for connecting the first pipe body and the second pipe body; the flexible guide assembly comprises a first connecting end and a second movable end, the first connecting end is fixedly connected to the first pipe body, and the second movable end is connected to the second pipe body in a sliding or rotating mode; when the first pipe body and the second pipe body are in the separated state, the flexible guide assembly maintains the preset relative position relation between the two pipe bodies. When the first pipe body and the second pipe body are connected through the connecting assembly, at least part of the flexible guide assembly is contained in a combined cavity formed by the two pipe bodies. Connection parts can be hidden, so that the appearance of the pipe body is more attractive, a folding function during separation helps to reduce the packaging volume of a product, logistics cost can be saved, and a preassembled positioning structure reduces the installation difficulty of a user.

The present application relates to the field of air compressor, specifically is common type cylinder head blank and air compressor. Common type cylinder head blank includes cover part and isolation part, cover part is provided with first exhaust port, second exhaust port, inner cavity and mounting surface for covering valve plate, inner cavity is separated by isolation part into first chamber, second chamber, third chamber, fourth chamber, fifth chamber, sixth chamber and seventh chamber, also has first variable shape part, second variable shape part and third partial isolation part is defined as third variable shape part. By configuring second exhaust port to communicate with third chamber, and by setting first variable shape part and third variable shape part in separated state from the rest of isolation part, common type cylinder head blank can be applied to primary compressor with two cylinder chambers, or, by setting second variable shape part in separated state from the rest of isolation part, common type cylinder head blank can be applied to secondary compressor with two cylinder chambers.