47results about How to "Unlock" patented technology

The invention relates to the technical field of automobile charging, and discloses a new energy automobile charging gun which comprises a shell, a charging head arranged on the shell and a cable arranged in the shell and further comprises a protection unit arranged in the shell, and the protection unit comprises an unlocking component and a separation component which are arranged in the shell; the unlocking part comprises a locking groove formed in the shell and an unlocking button arranged in the locking groove in a sliding mode. Through the arrangement of the unlocking part, when a driver forgets to pull out the charging gun and starts the automobile to drag the cable, the straightened cable enables the locking tongue piece to unlock the charging gun and the automobile through the trigger assembly, and through the separation part, the separation ring rapidly bounces outwards, and the charging gun is separated from the automobile; and meanwhile, the pop-up separation ring can wrap the charging head to protect the charging head, and the situation that the charging head is damaged due to the fact that the charging gun falls off is prevented.

The present application provides a kind of arterial compression hemostat, including shell, shell is provided with multiple groups rotatable winding frame, winding frame is provided with fixed band, the end of multiple groups fixed band is connected by buckle, rotatable drive cylinder is arranged in shell, drive cylinder end is provided with adjusting wheel, the end of drive cylinder is provided with compression pad, drive cylinder is provided with the same group number of drive unit as fixed band, each group drive unit is connected with one group fixed band, to convert the rotation of drive cylinder into the rotation of drive winding frame, and remove the drive of winding frame when fixed band is tensioned.The hemostat can be used to tighten multiple groups of fixed band in different ranges to perform arterial compression hemostasis, making it convenient for patients of different sizes to use and move, and the group of fixed band can be controlled to tighten without further tightening the fixed band that has been tightened during the movement process, effectively solving the many inconveniences of existing hemostatic devices when in use.

The utility model discloses a novel birthmark scar medicine skin penetration device which comprises an outer shell, an inner shell is installed on the lower side of the outer shell through a communicating pipe, a vibration needle is installed at the bottom of the communicating pipe through a telescopic installation plate assembly, and an adsorption layer is detachably installed at the bottom of the vibration needle. Vertical plates are fixedly connected to the left side and the right side of the top of the adsorption layer, a plurality of cylindrical clamping blocks extending to the outer side are slidably connected to an inner cavity of the inner shell, and long grooves used in cooperation with the cylindrical clamping blocks are formed in the surfaces of the vertical plates. The cylindrical clamping block is retracted into the inner cavity of the inner shell by sliding the cylindrical clamping block, so that the vertical plate is unlocked, and then the adsorption layer slides down to be separated from the lower end of the inner shell, so that the adsorption layer is quickly and conveniently disassembled and disinfected.

The utility model discloses a hard alloy extrusion forming device which comprises a base, guide columns are installed at the corners of the top end of the base, a top seat is installed at the top ends of the guide columns, a hydraulic assembly is installed at the top end of the top seat, and an upper carrying table is installed at the bottom end of the hydraulic assembly. By arranging the dust collecting groove, the baffle, the open groove, the connecting piece and the variable-diameter rubber lantern ring, collection of powdered scraps is achieved, the variable-diameter rubber lantern ring has good elasticity, the outer side of the lower die base can be tightly sleeved with the variable-diameter rubber lantern ring due to deformation of the variable-diameter rubber lantern ring, under the action of gravity, the powdered scraps are guided into the dust collecting groove, and the dust collecting effect is improved. The baffle is installed at the top end of the interior of the dust collection groove to prevent powdered scraps from scattering on the device from the edge, meanwhile, the cross section of the baffle is in an M shape, and the baffle is matched with the arrangement of the open groove, so that the powdered scraps can be rapidly guided into the dust collection groove, concentrated collection is conducted on the powdered scraps, cleaning of the powdered scraps is facilitated, and the powdered scraps are prevented from scattering on the lower loading table all around.

The utility model relates to the technical field of high-temperature molten metal blocking, and discloses a high-temperature molten metal leakage blocking device which comprises a supporting table, the upper surface of the supporting table is fixedly connected with a storage barrel, the surface of the supporting table is provided with a circle of movable groove, and the storage barrel is fixedly connected with the movable groove. A circle of baffle plates are arranged in the circle of movable grooves in a sliding manner; the two side faces of the supporting table are each fixedly connected with a set of fixing plates, a screw rod is rotationally connected between one set of fixing plates, the surface of the screw rod is sleeved with a thread sleeve in a threaded mode, one end of the thread sleeve extends into the movable groove, and the end of the thread sleeve and the baffle are detachably installed; when the device is used, leaked high-temperature molten metal can be effectively blocked, meanwhile, a blocking plate for blocking can be rapidly mounted and dismounted, and the blocking plate can be conveniently replaced or cleaned.

The utility model belongs to the technical field of milling cutter coating clamps, and particularly relates to a milling cutter coating spraying clamp which comprises a guide rod fixedly connected to the upper surface of a base, a connecting column fixedly connected to the fixed center of the upper surface of the guide rod, a wafer detachably connected to the connecting column, a mounting groove formed in the lower surface of the base, and a positioning mechanism arranged on the base. According to the milling cutter spraying device, a plurality of milling cutters can be conveniently sprayed at the same time, the spraying efficiency is greatly improved, the milling cutter spraying device is suitable for large-scale production scenes, the base is placed on the rotating base, it can be guaranteed that the milling cutters can be evenly sprayed, the limiting rods penetrate through the mounting grooves and are fixedly connected with the positioning openings, and the positioning openings in the positioning pieces abut against the milling cutters; and the precise position of the milling cutter in the spraying process is ensured, and the spraying uniformity and accuracy can be ensured.

A linkage cabinet door lock includes a lock body and an installation structure. The lock body has a locking assembly and a limiting mechanism. The locking assembly includes a bolt, a gear locking pin, and a rack. The bolt is slidably disposed in a bolt groove. A gear locking pin is rotatably disposed on the outside of the bolt groove, with a gear at one end and a locking end at the other. The gear meshes with the rack on the bolt to achieve linkage between the bolt and the gear locking pin. The locking assembly has unlocked and locked states. In the unlocked state, a compression spring pushes the bolt out of the lock body, and the locking end screws into the lock body. In the locked state, the bolt retracts into the lock body, and the locking end screws out of the lock body. During the sliding of the bolt, the rack drives the gear locking pin to rotate, realizing the switching between the two states. The limiting mechanism includes a limiting spring and a limiting actuator. The limiting head of the limiting spring is used to prevent the bolt from popping out. The limiting actuator controls the deformation of the limiting spring to release the limiting of the bolt. This invention has a simple structure, is easy to operate, and can realize individual control of the cabinet door on which this mechanism is installed.

The utility model relates to the technical field of snow protection walls, in particular to an insertable concrete rib plate type snow protection wall convenient to construct, which comprises a supporting base, a snow protection wall body is inserted on the supporting base, a plurality of concrete rib plates are symmetrically and fixedly mounted on the supporting base, a plurality of limiting grooves are formed in two side surfaces of the snow protection wall body, and the concrete rib plates are arranged in the limiting grooves. Mounting grooves are formed in the faces, close to the snow protection wall body, of the multiple concrete rib plates, limiting plates are rotationally mounted in the mounting grooves, and telescopic springs are fixedly mounted on the limiting plates. After the concrete rib plates are symmetrically arranged on the two side edges of the snow protection wall body, the snow protection wall body is supported through the concrete rib plates, the stability of the snow protection wall body is improved, and therefore the thickness of the snow protection wall body can be reduced, the construction period can be effectively shortened when the snow protection wall is used in an area lacking of rubbles, project investment is reduced, and economic and environment-friendly benefits are remarkable; and meanwhile, multi-wind-direction working conditions are coped.

The utility model discloses an intelligent ethylene oxide sterilization cabinet with multi-parameter cooperative control, which belongs to the technical field of sterilization equipment and comprises a bottom plate and a sterilization cabinet body, a pump body and an ethylene oxide storage box are fixedly mounted at the top of the bottom plate, a gas outlet of the pump body is communicated with a communicating pipe, and the other end of the communicating pipe is communicated with a feeding valve. A mouse cage is slidably mounted in the feeding valve, a supporting plate is fixedly mounted in the mouse cage, a transmission rod is hinged to one side of the supporting plate, a box is fixedly mounted on the outer side of the feeding valve, a rotating shaft is rotatably mounted in the feeding valve, and a connecting rod and a worm gear are fixedly mounted on the outer side of the rotating shaft. On the one hand, incomplete sterilization caused by insufficient gas quantity is avoided, on the other hand, resource waste and potential safety risks caused by excessive gas are prevented, meanwhile, stable flow supply is beneficial to maintaining the stability of pressure and temperature in the sterilization process, and the reliability and repeatability of the whole sterilization process are improved.

This invention provides a quick-release battery mechanism, including a battery assembly, a mounting base, a locking mechanism, and a switching mechanism. The mounting base has a battery compartment suitable for accommodating the battery assembly. The locking mechanism includes a locking groove, a locking pin, a locking spring, and an operating part. The locking spring is adapted to drive the locking pin into the locking groove, and the locking mechanism is in a locked state. The operating part is adapted to drive the locking pin out of the locking groove, and the locking mechanism switches from the locked state to the unlocked state. The switching mechanism is adapted to limit the operating part, so that the locking pin remains out of the locking groove, that is, the locking mechanism remains in the unlocked state. One of the battery assembly and the mounting base includes the locking groove, and the other of the battery assembly and the mounting base includes the locking pin and the operating part. This invention, by setting up a locking mechanism and a switching mechanism, ensures the stable installation of the battery assembly on the mounting base, while allowing users to quickly and easily complete the installation and removal of the battery.

This application discloses a stall mechanism and a passive lock. The stall mechanism includes a stall driver, a stall drive shaft, a stall clutch shaft, a stall structure, and a stall elastic element. The stall drive shaft is connected to the rotating shaft of the stall driver, which drives the stall drive shaft to rotate forward. The stall clutch shaft is sleeved on the outside of the stall drive shaft, and at least two recessed stall avoidance areas are provided at circumferential intervals on the outer peripheral sidewall of the stall clutch shaft. The stall structure is reciprocating and can move to a position where it engages with the stall avoidance areas or move in the opposite direction to a position where it is disengaged from the stall avoidance areas. The stall elastic element is disposed on the stall drive shaft, which can push the stall clutch shaft to rotate forward through the stall elastic element, and the stall elastic element can further push the stall clutch shaft to rotate forward. This application can be widely applied in the field of Internet of Things (IoT) smart terminal technology.

The utility model relates to the technical field of screening, specifically is a kind of organic fertilizer batching screening equipment with replaceable screen plate, including screening box, the top of screening box is fixedly connected with feed hopper, the top of screening box is rotatably connected with maintenance cover plate, further include: screening subassembly, the outside of screening subassembly is fixedly connected with the inside of screening box, the equipment is replaced by being arranged screening subassembly, when needing to replace screen plate according to the screening particle size requirement of different organic fertilizer batching, after the bolt fixed between limiting block and sliding block is disassembled, limiting block is removed, at this moment, two sliding blocks can slide in sliding groove, then simultaneously pinch two sliding blocks, insert rod moves together with sliding block, and comes out from insertion hole, so the locking of screen plate can be released, so that screen plate can slide out from sliding frame, to replace screen plate of different aperture, only need to disassemble bolt, pinch two core steps of sliding block, and the locking can be released, shorten screen plate dismounting time.

The invention relates to the technical field of material mixing devices, and discloses a water conservancy project construction material mixing device which comprises a fixed mounting support, an L-shaped metal support is fixed to one side of the fixed mounting support, and two metal fixing pads are mounted on the outer side of the L-shaped metal support; the device is provided with a material mixing mechanism, when materials are discharged after stirring is completed, locking of the angle of a rotating connecting shaft is conveniently relieved, the mixed materials in a stirring and mixing container can be poured out after the stirring and mixing container rotates, discharging is completed, the purpose of improving the mixing efficiency is achieved, and mixing of the construction materials of the water conservancy project is facilitated; the device is provided with an auxiliary discharging mechanism, when the stirring and mixing container conducts discharging, a rubber impact rod can impact the outer wall of the stirring and mixing container multiple times along with reciprocating motion of a metal rack, materials attached to the inner wall of the stirring and mixing container are assisted to fall down, and discharging of the materials after auxiliary mixing is conducted is facilitated.

The invention relates to a workpiece fixing device for vehicle motor shaft machining, and belongs to the technical field of motor shaft machining devices. Comprising a working table, the working table is fixedly connected with a mounting plate, the mounting plate is rotatably connected with a rotating frame, the working table is fixedly connected with a first motor, the rotating frame is slidably connected with adjusting pieces which are distributed at equal intervals in the circumferential direction, and the adjusting pieces are slidably connected with clamping pieces; the rotating frame is rotatably connected with blocking pieces distributed at equal intervals in the circumferential direction and transmission shafts distributed at equal intervals in the circumferential direction, the workbench is slidably connected with a sliding seat, the sliding seat is fixedly connected with a fixing rod, the fixing rod is slidably connected with a supporting seat, and the supporting seat is rotatably connected with a rolling wheel. The motor shaft is supported through the rollers, so that the stress of the motor shaft in the machining process is more balanced, and the extrusion of the motor shaft on the clamping piece under the action of a lever during machining is reduced, so that the abrasion of the clamping piece during use is reduced, and the precision of the motor shaft in the machining process is ensured.

The utility model relates to the technical field of standard brick moulds, in particular to a standard brick mould lining plate with a discharging device, which comprises a lower mould and a pressing component, the pressing component is mounted above the inside of the lower mould, and the pressing component is used for controlling the device to integrally flatten and discharge bricks to provide power. The discharging assembly is installed on the lower portion of the lower die and used for controlling the whole device to conduct stable discharging. Through a series of cooperative arrangement of the pressing assembly, the effect of flattening and pressing brick raw materials in the lower die can be achieved, the brick quality is better, through the arrangement of the discharging assembly, the purpose of conveniently and automatically discharging a discharging plate can be achieved, and the problem that according to an existing discharging mode, due to the fact that a certain distance exists between a plate and a brick machine, the brick machine is not convenient to discharge is solved. And when the bricks fall on a plate below the brick machine, the bricks are possibly deformed under the influence of gravity, so that the produced bricks are possibly unqualified in size.

The utility model relates to the technical field of seed screening equipment, in particular to a screening device for sunflower production, which comprises a base, a blanking hopper is fixedly connected above the base through a support rod, a screening mechanism is arranged on the base and positioned below the blanking hopper, the screening mechanism comprises a vibration support, and the lower end of the vibration support is fixedly connected with the base. The upper end of the vibration support is fixedly connected with the rack, vibration motors are installed on the two side faces of the lower end of the rack, a first sieve plate, a second sieve plate and an impurity guide plate are sequentially arranged in the rack from top to bottom, quick-release assemblies are arranged on the two outer side faces of the rack, and the first sieve plate and the second sieve plate are fixed to the rack through the quick-release assemblies. By arranging the quick release assembly, the first sieve plate or the second sieve plate can be replaced more quickly and conveniently compared with the traditional mode of replacing the sieve net by detaching bolts.

The utility model discloses a curve blanking transfer point chute, and particularly relates to the field of chutes, the curve blanking transfer point chute comprises a transfer point chute main body, the bottom of the transfer point chute main body is connected with a curve blanking pipe, and the bottom of the curve blanking pipe is connected with a connecting container; the device is provided with the locking device, so that the maintenance movable door can be conveniently opened, and the blockage in the chute main body at the transfer point can be conveniently cleaned and maintained, thereby conveniently solving the problems in the use process of the chute, prolonging the service life of the chute, improving the reliability of the chute, reducing the use cost of a user and improving the production efficiency; the device is provided with a reinforcing device, so that the corresponding surface of the attaching pad on the outer side of the moving pad is attached to the outer side of the corresponding reinforcing non-slip pad, the stability of the maintenance movable door after closing is enhanced from the outer side, it is ensured that the closing structure of the maintenance movable door is stable and not loosened, and operation is convenient when attaching between the attaching pad and the reinforcing non-slip pad needs to be removed; and only the plastic handle needs to be pulled.

This utility model discloses a robust RF connector structure, including a hollow base with an insertion hole at the top. A connector body is positioned above the hollow base, and an auxiliary box is fixedly mounted at the bottom of the connector body. Insertion holes are provided on all four outer walls of the auxiliary box. A driving mechanism and four insertion mechanisms are disposed within the hollow base. The driving mechanism includes a rotating shaft rotatably connected to the bottom of the hollow base, a worm gear fixedly mounted on the outer wall of the rotating shaft, and a worm rotatably connected between the two inner walls of the hollow base. This utility model, by setting up the driving mechanism and insertion mechanisms, allows the four insertion rods to be inserted into or moved away from the insertion holes simply by rotating a knob, thereby achieving locking and unlocking of the connector body. The operation is simple and convenient, and the worm gear and worm wheel have self-locking properties, resulting in a more robust connection.

The invention discloses an electrical engineering distribution switch, which belongs to the technical field of distribution switches. In order to solve the problem that the flap on the existing distribution switch box body needs workers to hold it by hand after it is opened, which affects the workers' operation of the distribution switch; and the existing distribution switch has an overload protector inside which is fixedly installed on the inner wall of the distribution box, and the overload protector is troublesome to disassemble and assemble; the present invention arranges a worm at the end of a movable shaft at one end of the protective flap, and uses a control rod member penetrating the outer wall of the mounting seat to engage the worm to press and rotate it to control the protective flap to flip open. After the control rod member is pressed and released, the self-locking worm is immediately reset to fix the protective flap, and a positioning hole is provided on the mounting plate on the inner wall of the distribution box body to plug in the overload protection switch, and a mounting hole is correspondingly provided on the top of the mounting plate to install an auxiliary positioning member to lock the overload protection switch, so as to achieve its installation and fixation; the present invention avoids the problem of no support after the protective flap is opened, and is convenient and practical.

The utility model discloses a tail-rotating plug pin for a hairdressing device, particularly relates to the technical field of tail-rotating plugs, and comprises a mounting block, a connecting ring is arranged at the bottom of the mounting block, a lifting rod is arranged at the top end in the mounting block in a penetrating manner, and a plurality of moving blocks are arranged on the side wall, close to the bottom end, of the mounting block in a penetrating manner; one side of the top of the mounting block is rotationally connected with an inclined pipe; the outer wall, close to the top, of the mounting block is in threaded connection with a threaded ring; the bottom end of the lifting rod is fixedly connected with a moving disc, and the top of the moving disc is fixedly connected with an extrusion spring around the outer wall of the lifting rod. The top of the end, close to the interior of the mounting block, of the moving block is rotationally connected with a connecting rod. The bottom of the moving disc is rotationally connected with the connecting rod. And an extension rod is arranged at the center of the bottom of the connecting ring, and a cable penetrates through one side of the interior of the mounting block. The plug has the advantages that the plug can be conveniently rotated and clamped to avoid pulling and falling off, the clamping is conveniently released, and the plug is convenient to plug and unplug.

The invention relates to the related technical field of digital display measuring tools, in particular to a position measuring device capable of measuring force constantly, which comprises a body, a digital display module, a battery and a sensor PCB (printed circuit board) assembly. A ruler frame, a measuring anvil, a guide shaft sleeve, a measuring rod assembly, a constant measuring force assembly and a fixing sleeve are installed in the body. An annular groove is formed in the inner wall of the fixing sleeve; the constant force measurement assembly comprises a constant force measurement shaft, a constant force measurement spring, a locking bolt, a reset spring, a release button and a support, the locking bolt is provided with a protrusion structure matched with the annular groove, and the constant force measurement assembly can be selectively and axially fixed through clamping of the protrusion structure and the annular groove. After the release button is pressed to enable the protruding structure to be separated from the annular groove, the measuring rod assembly can rapidly move in the axial direction. After the release button is released, the protruding structure is meshed with the annular groove again, and the constant force measuring spring provides constant measuring force for the workpiece through the measuring rod assembly. Rapid feeding of the measuring rod can be realized, high stability of measuring force is ensured, and repeatability and accuracy of a measuring result are remarkably improved.

This utility model provides a rapid heat-sealing device for tea packaging bags, including: a conveyor belt, an mounting plate on the conveyor belt, a support frame on the mounting plate, a support plate on the support frame, a heat-sealing head on the support plate, and a metal plate on the mounting plate; it also includes: a cleaning component, which is mounted on the support plate and includes an inclined plate and a spring, with the inclined plate mounted on the support frame. This utility model controls the downward pressure of the heat-sealing head to quickly seal the packaging bag. After sealing the tea packaging bag, by controlling the support plate to move in the opposite direction to the metal plate, the inclined side of the inclined plate presses against the connecting rod, thereby driving the slider to slide within the groove. This allows the cleaning component to clean the surface of the heat-sealing head, preventing tea fragments and melted packaging bag residue from remaining on the surface of the heat-sealing head, ensuring stable rapid heat sealing of the packaging bag.

The utility model relates to the technical field of wallboard installation, in particular to a thermal insulation composite interior decoration wall anti-falling structure which comprises a wallboard structure, wallboard hanging pieces are fixedly installed on the edges of the upper side and the lower side of the rear surface of the wallboard structure, wallboard anchoring pieces are installed on the two sides of the wallboard structure in an embedded mode, and the number of the wallboard anchoring pieces is four. The wallboard hanging piece comprises an inserting piece body, locking buckles are installed at the two ends of the inserting piece body in a sliding mode, and the inserting piece body and the locking buckles are connected into the hanging piece inserting sleeves in a clamped mode. According to the utility model, the pendant plug bush is mounted at an indoor wall body on which the heat-insulating decorative wallboard needs to be mounted according to the mounting position planned by the wallboard structure, the surface of the wall body is coated with the adhesive, and the heat-insulating decorative wallboard is attached to the wall body, so that the plug-in main body can be inserted into the pendant plug bush; the locking buckles are buckled into the buckling grooves formed in the hanging piece inserting sleeves, so that the heat preservation decoration wall plate can be hung and buckled on the wall plate, certain buckling and locking work is carried out, and falling is avoided.

The invention belongs to the technical field of medical care equipment, and discloses wearable equipment based on mammary gland liver soothing generation, the wearable equipment comprises an elastic bandage, the left side and the right side of the middle end of the elastic bandage are fixedly sleeved with two semicircular covers respectively, and the front sides of the inner surfaces of the two semicircular covers are fixedly provided with female hook-and-loop fasteners respectively. By arranging the air bags, the extension pipe, the connecting hose, the air inlet pipe and the rectangular bag, when the rectangular bag is continuously pressed, air in the rectangular bag enters the connecting hose through the first one-way valve and the air inlet pipe, and then enters the two air bags through the extension pipe from the connecting hose, so that the air bags are expanded; and the air bag forces the disposable heating pad to move inwards, so that the fitting degree of the disposable heating pad and the chest of the user can be ensured by adjusting the expansion degree of the air bag, and the phenomenon that the warm physical therapy effect is affected due to gaps is prevented.

This invention provides a shielded cable installation mechanism, relating to the field of cable installation technology, including cables; it also includes a locking mechanism, which has two sets, including a fixed cylinder, the cable being slidably connected to the fixed cylinder, one end of the fixed cylinder having multiple sets of locking grooves, and the other end having a rotating groove, the rotating groove having multiple sets of balance springs, the fixed cylinder having multiple sets of sliding grooves, the outer wall of the fixed cylinder having a hexagonal groove, the rotating groove having a locking ring rotatably connected to it, the locking ring having multiple sets of unlocking grooves, the multiple sets of balance springs corresponding one-to-one with the multiple sets of unlocking grooves, the two ends of the balance springs being fixedly connected to the inner side wall of the unlocking groove, and the outer wall of the locking ring having multiple sets of friction strips. This invention overcomes the problem of traditional cable installation requiring separate fixing of the cable body, shielding tube, and corrugated tube, and designs an integrated synchronous locking mechanism, realizing one-time rapid synchronous locking of the cable, shielding tube, and corrugated tube.

The utility model discloses a hand-held screw installation position rapid detection tool comprising a pair of housing plates, and a gap is left between the two housing plates; comprising a steel ball, the steel ball is movably arranged between shell plates and comprises a rotating arm, the rotating arm is rotationally connected between the shell plates, and the steel ball abuts against the inward end of the rotating arm; comprising an unlocking arm, the unlocking arm is rotationally connected between shell plates, one end of the unlocking arm extends out of the shell plates, the other end of the unlocking arm abuts against a rotating arm and a steel ball, a screw does not need to be reversely rotated, time needed for detection is shortened, and detection efficiency is improved.

This utility model discloses a detachable plate heat exchanger that is easy to clean. It includes two sets of side plates, with four symmetrically arranged crossbars fixedly connected between them. Clamping plates are slidably connected to the outer walls of the crossbars. An unfolding assembly is provided on the outer walls of the crossbars, comprising an upper crossbar and a lower crossbar. The upper crossbar is slidably connected to the outer walls of the two upper crossbars, and the lower crossbar is slidably connected to the outer surfaces of the two lower crossbars. Grooves are formed on the bottom surface of the upper crossbar and the surface of the lower crossbar. This easy-to-clean detachable plate heat exchanger, by rotating a screw, drives the clamping plates to slide along the crossbars, releasing the clamping of the unfolding assembly. Multiple upper and lower crossbars can unfold outwards along the crossbars due to the linkage of hinge plate one and hinge plate two, increasing the spacing between the heat exchange plates and facilitating observation of dirt on the plate surfaces.

The utility model relates to the technical field of alarm devices, in particular to a fire alarm device for fire protection engineering, which comprises a mounting plate, the bottom surface of the mounting plate is fixedly connected with an assembly sleeve, and the inner wall of the assembly sleeve is slidably connected with an alarm device body. Compared with the prior art, the alarm device has the advantages that the alarm device body is inserted into the assembling sleeve along the sliding groove, the clamping column is pulled to move into the clamping hole, the alarm device body and the mounting plate can be assembled, the alarm device body can be quickly mounted, at the moment, the metal switching column can be inserted into the metal switching hole, and the alarm device body can be quickly mounted. When the alarm device body needs to be disassembled and overhauled, the clamping columns are pulled outwards to move out of the clamping holes, locking of the alarm device body can be relieved, then the alarm device body can be quickly disassembled, disassembly of expansion wires and electric wires is not needed, and the alarm device body can be conveniently disassembled. And the alarm device body can be conveniently disassembled and overhauled.