36results about How to "Guaranteed pressing force" patented technology

The invention relates to the technical field of scraper conveyors, in particular to a scraper type slag salvaging machine which comprises a shell, a material bearing plate is arranged in the shell, a driving shaft and a driven shaft are rotationally arranged at the front end and the rear end of the shell respectively, a chain assembly is wound around the driving shaft and the driven shaft, and the chain assembly comprises two first chains and a second chain. The second chain is located between the two first chains, a plurality of rotating shafts are arranged on the second chain front and back at intervals, two telescopic scraping plates are hinged to the rotating shafts, each telescopic scraping plate comprises a first scraping plate and a second scraping plate which are in sliding connection, the first scraping plates are rotationally arranged on the rotating shafts, and each second scraping plate is fixedly connected with one first chain; the telescopic scraping plate slides along the surface of the material bearing plate, when slag materials driven by the telescopic scraping plate are increased, the length of the telescopic scraping plate is increased, meanwhile, rotation of the telescopic scraping plate can drive the first chain to be tightened, the contact pressure between the telescopic scraping plate and the surface of the material bearing plate is increased, and the phenomenon of material leakage is avoided.

The invention relates to a modular design-based negative pressure adsorption wall-climbing robot and a use method thereof, the modular design-based negative pressure adsorption wall-climbing robot comprises a body frame, two moving modules and a negative pressure adsorption module, the two moving modules are respectively mounted on two sides of the body frame, the negative pressure adsorption module is mounted at the bottom of the body frame, and the negative pressure adsorption module is located between the two moving modules. The negative pressure adsorption module comprises an adsorption cavity, a sealing skirt, a fan and adjusting mechanisms, the fan is installed at the top of the adsorption cavity, the sealing skirt is installed at the edge of the lower side of the adsorption cavity, the multiple sets of adjusting mechanisms are installed on the adsorption cavity and connected with the sealing skirt, and the sealing skirt adjusts the shape of the bottom adsorption face through the adjusting mechanisms. The negative pressure adsorption module of the robot can automatically adjust the shape of the sealing skirt, so that the stability and reliability of the negative pressure adsorption module are improved, and the negative pressure adsorption wall-climbing robot can vertically climb and work on an arc-shaped or curved working face.

The utility model discloses a wall type sole pressing machine which comprises a sole pressing station arranged on a working table, a pressing die set is arranged corresponding to the sole pressing station and is pushed by power to move up and down, and a mechanical arm and a top pressing part are arranged above the pressing die set. The device is characterized in that the manipulator and the jacking component are mounted on a transverse sliding seat in a left-right arrangement manner, the transverse sliding seat is pushed by a first driving part to transversely slide, the manipulator comprises a mechanical claw A and a mechanical claw B which are longitudinally arranged, and the mechanical claw A and the mechanical claw B are pushed by a second driving part to longitudinally linearly move; the workbench is pushed by the third driving piece to do vertical linear motion, and a feeding station is arranged on the feeding side of the workbench. The automatic sole pressing machine is used for automatic sole pressing production of shoes, the action structure is simple and efficient, the steering function is achieved when the shoes are sent out, and the requirements of subsequent procedures are met in multiple modes; and the sole pressing quality can be ensured under the condition that the sole is not conveyed in place.

The invention relates to the technical field of bridge rectangular pier body pouring, and discloses a bridge rectangular pier body steel bar positioning clamp which comprises a mounting frame. The four mounting openings are formed in the mounting frame, and each mounting opening is of a long-strip-shaped structure; the latches are fixed in the four mounting ports respectively, and the latches located in the same row jointly form a zigzag structure; the sliding seats slide in the four mounting openings respectively, and a mounting groove is formed in the bottom surface of each sliding seat; the mounting cylinders are fixed to the top faces of the sliding seats correspondingly. By arranging the movable sliding seat, the construction flexibility and efficiency are greatly improved, and in the construction process of the rectangular pier body of the bridge, the positioning of reinforcing steel bars often needs to be accurately adjusted according to specific construction conditions and design requirements, so that the construction time and the labor cost are greatly saved.

The utility model discloses a printed circuit board solder mask hole plugging device relates to the technical field of equipment or method for manufacturing printed circuit, this printed circuit board solder mask hole plugging device, including the casing, the casing is used for printed circuit board solder mask hole plugging device, and the inside fixed connection of casing has two columnar body, two columnar body are all hollow structure, and the inside sliding connection of two columnar bodies has the sliding column, and the lower surface fixed connection of two sliding columns has clamping piece, and the inside mounting of two clamping pieces has the hole aluminum sheet board, wherein, the inside fixed connection of casing has telescopic movement link, and spring can compress and provide the compression force, avoid its compression force deficiency and lead to the damage of circuit that the ink penetrates to circuit board surface leads to, and the compression force is not only influenced by the hole aluminum sheet board position while the hole aluminum sheet board downward motion sticks to the circuit board of different thickness to guarantee that the device can provide the compression force for the circuit board of different thickness.

The utility model relates to inductor assembly technical field, especially in a kind of assembly positioning jig, including base and top cover, the base is provided with multiple main positioning slot, the main positioning slot is matched with the overall size of PFC inductor, the base is also provided with first positioning slot, the first positioning slot is matched with the size of the bottom magnetic core of PFC inductor, the top cover is provided with second positioning slot, the second positioning slot is matched with the size of the top magnetic core of PFC inductor, the top cover with the base between being provided with quick pull buckle structure.The utility model makes the main body of PFC inductor, bottom magnetic core and top magnetic core can be positioned, quick pull buckle structure not only facilitates the installation, disassembly of top cover and base, can also provide acting force simultaneously so that PFC inductor keeps pressure force, ensure that each component keeps the stability after bonding, finally improves the yield and quality of PFC inductor assembly.

A shark fin assembly and a mounting structure of the shark fin assembly, wherein the shark fin assembly is used to be connected to a vehicle body roof (5), the shark fin shell comprising an open end and a circumferential flange (21) arranged on the open end, the circumferential flange (21) being provided with at least two first connecting members (22), the shark fin shell being used to be connected to the vehicle body roof (5) via the first connecting members (22); the first connecting member (22) being used to provide the shark fin shell with a biasing force toward the vehicle body roof (5); the circumferential flange (21) being connected to the vehicle body roof (5) via an adhesive member (4); by providing the first connecting member (22) integrally formed with the circumferential flange (21), the shark fin shell is firmly connected to the vehicle body roof (5) via the first connecting member (22), so that the first connecting member (22) is used to provide the shark fin shell with a biasing force toward the vehicle body roof (5), thereby avoiding the phenomenon of unstable connection when only the adhesive member (4) is used for connection.

This invention provides a compressor housing assembly, a compressor, and an air conditioner. The compressor housing assembly includes a compressor housing and a sensor mounting bracket fixedly connected to the compressor housing. The sensor mounting bracket includes a mounting body, and an insertion channel for pressing a temperature measuring section of a temperature sensor is formed between the mounting body and the compressor housing. A cantilever pressing structure is formed on the end face of the mounting body downstream of the temperature sensor insertion direction. The cantilever pressing structure extends a predetermined length M along the insertion direction, where 7L / 8≥M≥L / 3, where L is the axial length of the temperature measuring section of the temperature sensor. This invention ensures a large pressing contact area with the temperature sensor, thus ensuring reliable pressing and preventing loosening due to an insufficient pressing contact area or scratches or pressure damage to the sensor due to excessive local force. The deformation of the cantilever pressing structure is also more controllable.

The present invention discloses an automatic clamping mechanism and method for boring and milling of a large vertical milling machine gearbox, belonging to the technical field of machine tool parts processing, including a rough positioning clamping mechanism, a horizontal alignment support mechanism, an auxiliary support clamping mechanism, and a rough positioning auxiliary mechanism matched with the rough positioning clamping mechanism; the vertical auxiliary center plane of the rough positioning auxiliary mechanism is coplanar with the vertical center plane of the gearbox; the rough positioning clamping mechanism includes a support boss for supporting the bottom end surface of the rough positioning auxiliary mechanism and a rough positioning clamping part for clamping the rough positioning auxiliary mechanism; the horizontal alignment support mechanism includes two height-adjusting support rods for supporting the corresponding ends of the bottom end surface of the gearbox plate and capable of adjusting the support height. The present invention performs horizontal clamping of the milling machine gearbox blank, can perform automatic horizontal alignment, saves alignment time, reduces the labor intensity of the operator, and at the same time, the clamping is stable and the clamping force is sufficient.

The utility model relates to the technical field of hydraulic pump machining, in particular to a press fitting station. A press-fitting station comprises a pressing head which is horizontally and slidably assembled and is driven to move by a first driving part; the supporting plate is horizontally assembled in a sliding mode, the supporting plate is driven by a second driving piece to move, and the supporting plate and the pressing head are oppositely arranged in a spaced mode; and the bearing table is used for bearing a workpiece, the bearing table conveys the workpiece to a press-fitting position between the pressing head and the supporting plate, and during press-fitting, the pressing head pushes the workpiece to be pressed on the supporting plate in a sliding mode. The technical problems that in the prior art, a bearing in an intermediate is low in assembling efficiency and poor in precision are solved.

The utility model relates to a precise positioning support tool, and belongs to the field of machining positioning toolings, the precise positioning support tool comprises a working platform and a fastening assembly, the upper surface of the working platform is provided with a positioning column, and the positioning column is clamped in a through hole; the fastening assembly is arranged on the working platform and comprises two L-shaped supports, each L-shaped support comprises a first telescopic rod and a horizontal rod which are perpendicular to each other, the lower side of each horizontal rod can abut against the upper side of the corresponding support, a cavity is formed in the position, corresponding to the corresponding L-shaped support, of the working platform, and the first telescopic rods vertically extend downwards into the cavities. A turbine is arranged in the cavity, and the turbine is coaxially and fixedly arranged at the lower end of the first telescopic rod; a worm meshed with the turbine is arranged on one side of the turbine, one end of the worm penetrates through the working platform and is fixedly connected with a hand wheel, and the hand wheel rotates to drive the two L-shaped supports to rotate and fix the support to the working platform. The machining method has the effect of improving the machining precision of the support.

The invention relates to an embedded bottle opening sealing structure of a plastic inner container carbon fiber winding gas cylinder and a manufacturing method, the embedded bottle opening sealing structure of the plastic inner container carbon fiber winding gas cylinder is characterized in that a plastic inner container bottle opening comprises a bottle opening neck part and a bottle opening mouth part which are coaxially arranged and communicate with each other, and a metal reinforcing part is embedded in the plastic inner container bottle opening; the metal reinforcing piece is arranged on the outer side of the central axis of a bottle opening of the plastic inner container in a surrounding mode and completely wrapped by the bottle opening of the plastic inner container, the metal reinforcing piece and the inner wall of the neck portion of the bottle opening form an annular plastic thin layer, a radial sealing groove is formed in the peripheral face of the bottle valve, and a sealing ring is arranged in the radial sealing groove. The sealing ring is configured to be in mutual sealing contact with the plastic thin layer when the cylinder valve is connected with the internal thread. In conclusion, according to the embedded type bottle opening sealing structure of the plastic inner container carbon fiber winding gas cylinder, the metal reinforcing piece is embedded into the bottle opening of the plastic inner container, and the plastic thin layer is formed by the metal reinforcing piece and the neck of the bottle opening, so that the sealing reliability of the bottle opening of the plastic inner container is improved.

The invention relates to a clutch service life early-warning device, a clutch and a vehicle. The clutch service life early-warning device comprises a shaft sleeve; the sliding sleeve is arranged on the shaft sleeve in a sliding mode and used for being connected with a driving mechanism, and one end of the sliding sleeve is used for abutting against a diaphragm spring connected with a clutch pressure plate; the resistance mechanism is telescopically arranged on one of the sliding sleeve and the shaft sleeve; a concave pit is formed in the other one of the sliding sleeve and the shaft sleeve, and the concave pit arranged on the shaft sleeve or the resistance mechanism is arranged on a preset early warning position, so that the resistance mechanism extends into the concave pit when the sliding sleeve moves to the early warning position. When a driver steps on the clutch pedal again to enable the sliding sleeve to push the diaphragm spring, the resistance mechanism can increase resistance on the basis of original basic operating force due to blocking of the pit, discomfort which can be obviously sensed by the driver is formed, and the driver is reminded to replace the clutch as soon as possible.

The present invention relates to the technical field of wellhead sealing, and is a method for sealing against dry wear of an oil pumping wellhead and a sealing packing box against dry wear. The former includes the following steps: S1, the lower end of the lower packing box with a lower support ring fixed on the inner side of the lower part is passed through the outer side of the light rod and fixedly installed with the upper end of the wellhead equipment. The present invention has a reasonable and compact structure, and lubricating liquid is regularly added to the lubricating liquid filling component, and the lubricating liquid is injected into the liquid inlet by the lubricating liquid filling component, and then the lubricating liquid passes through the oil hole of the oil pressure sleeve and adheres to the outer side of the light rod, so that the light rod is lubricated. The first sealing component and the second sealing component are arranged to prevent the lubricating liquid from being easily lost, so that the light rod can be fully lubricated, and dry wear of the light rod can be prevented, and continuous lubrication of the oil pumping wellhead seal can be achieved, and the maintenance of the sealing component is more convenient. When the intermittent oil well is only venting gas, the phenomenon of heating of the light rod caused by dry wear of the light rod and the packing and oil leakage after the seal fails can be avoided.

The self-locking electrical connection structure disclosed in this invention includes a first conductor and a second conductor, and further includes: a latching contact finger hinged to the second conductor for electrical connection and engagement with a slot on the outer periphery of the first conductor; a reset elastic element for gripping the latching contact finger in the slot; an unlocking device disposed on the path along which the latching contact finger slides in the slot, allowing the latching contact finger to disengage from the slot when engaged with the unlocking device; and a contact plate for electrical connection to the end of the first conductor and connected to the second conductor via a conductive compression elastic element, wherein the latching contact finger engages with the slot when the conductive compression elastic element is compressed to a preset state. This invention achieves self-locking through the engagement of the latching contact finger and the slot, ensuring connection stability and high reliability. Unlocking can be quickly achieved through the engagement of the latching contact finger and the unlocking device, simplifying the installation and disassembly steps of the electrical connection. This invention also discloses a high-voltage switchgear.

The utility model provides an assembly with a main shaft head and a main body pressed by screws, and relates to the technical field of offshore oil exploration equipment. The spindle comprises a spindle head and a body, the bottom end of the spindle head is provided with an unthreaded hole, the top end of the body is provided with a smooth shaft, the smooth shaft and the unthreaded hole are connected in a matched mode through the unthreaded hole, and meanwhile the spindle head is connected with the top end of the body through an inner hexagonal screw. Threaded connection between the main shaft head and the main body is omitted, unthreaded hole matched connection is adopted, the plastic lining is additionally arranged to enable the main shaft head and the main body to be assembled and disassembled smoothly, meanwhile, the inner hexagonal screw is selected for pressing assembly, the length of the upper end of the main body is lengthened, the length of the pressing inner hexagonal screw is moderate, and pressing force and strength are guaranteed.

A solid crystal pickup and packaging device belongs to the technical field of chip packaging devices. It is characterized by comprising a mold adjustment device (57), a chip separation device (4) and a chip conveying device (5), wherein the chip separation device (4) is arranged on the lower side of the mold adjustment device (57), the chip conveying device (5) is arranged on the upper side of the mold adjustment device (57), a mold frame for clamping the mold (13) is arranged on the mold adjustment device (57), and a detection device is also arranged on the upper side of the mold adjustment device (57). The mold adjustment device of the solid crystal pickup and packaging device can drive the mold to rotate, thereby adjusting the posture of the chip, ensuring that the corresponding positions of the chip and the lead frame are aligned, so that the chip conveying device can accurately convey the chip to the corresponding position of the lead frame, ensuring the accuracy of chip placement, improving the stability of chip solid crystal packaging, and having a high product qualification rate.

This invention discloses a four-channel fuel cell bipolar plate and fuel cell, relating to the field of fuel cells. It includes an anode plate and a cathode plate arranged opposite each other. The anode plate forms parallel and staggered first and second ridges protruding towards the cathode plate, with the first and second ridges closely attached to the cathode plate, forming a first flow channel between them. A second flow channel and a third flow channel are formed on the opposite side of the first and second ridges relative to the cathode plate, respectively. The cathode plate protrudes along the first ridge and towards it to form a first nozzle, and along the second ridge and towards it to form a second nozzle, with the first and second nozzles arranged alternately. The bipolar plate of this invention has a dedicated drainage channel and can reuse water generated by the electrochemical reaction to self-humidify air and hydrogen, ensuring the normal operating temperature and humidity of the proton exchange membrane.

This utility model relates to a water- and oxygen-barrier storage box, characterized by comprising a storage box lid, a storage box body, and a locking module. The utility model employs a double-layered sealing structure with varying heights of the sealing rings to ensure effective sealing of the storage box body, achieving water and oxygen barrier effects. Furthermore, a movable mesh box is installed between the two sealing rings to store desiccants and oxidants, reducing the intrusion of external moisture and oxygen into the storage box body. Additionally, the locking module of the entire storage box body uses an adjustable locking hook. In actual use, rotating the locking hook controls the extension of the screw section, thereby ensuring the clamping force between the storage box lid and the storage box body.

The invention relates to the technical field of automobile part spot welding, in particular to an automobile part spot welding robot which comprises a fixed conveying mechanism and a positioning welding mechanism, the fixed conveying mechanism is placed on the ground, and the positioning welding mechanism is arranged on the rear side of the fixed conveying mechanism; according to the automobile door inner plate surface cleaning device, intermittent conveying and moving are conducted on an automobile door inner plate through the fixed conveying mechanism, and meanwhile surface cleaning is conducted, so that the situation that full attachment of the automobile door inner plate and a reinforcing rib is affected by particle dirt is prevented; and then the two sides of a welding point and a welding head are sequentially subjected to stable and sufficient welding of local compression and pressure maintaining after spot welding, and the welding effect is improved.

The utility model belongs to the technical field of transformer winding processing, and particularly relates to a hollow constant pressure device which comprises a drying bin, a pressing mechanism and a sliding tensioning mechanism, the drying bin is provided with a hollow structure, the pressing mechanism is arranged in the hollow structure, and the pressing mechanism comprises a base, a first bearing plate, a second bearing plate and a hydraulic oil cylinder. One end of the hydraulic oil cylinder is fixedly connected with the first pressure bearing plate, the other end of the hydraulic oil cylinder is fixedly connected with the second pressure bearing plate, through holes are formed in the first pressure bearing plate and the second pressure bearing plate, and the sliding tensioning mechanism comprises a cover plate, a vertical rod, a hinge rod, a screw rod, a movable seat and a power source. One end of the screw rod penetrates through the drying bin and is fixedly connected with the power source, the movable seat is in threaded connection with the screw rod, and the vertical rods are a plurality of loop bars which are in threaded connection with one another. The device has the advantages that limitation on the pressing mechanism is increased, and the working efficiency of the device and the quality of finished products are improved.

The utility model discloses a kind of automobile steering gear parallelism detection devices, it is related to automobile parts detection equipment technical field, including base and dial gauge, the upper end of the base is provided with sliding slot, the inside of the sliding slot is slidably installed with two groups of sliding blocks, one end of two groups of the sliding block is evenly installed with threaded seat, the upper end of two groups of the sliding block is evenly installed with limit recess, the upper end of two groups of the threaded seat is evenly connected with No. The utility model discloses, by adjusting the distance between two groups of limit recess, can adapt to different length specifications automobile steering gear, reduce equipment investment cost, satisfy the detection demand of diversification.

The utility model discloses a kind of glue gun mixed pipe replacement mechanism, belong to automatic gluing technical field, the device will glue supply part and glue gun mixed pipe modularization, and by compacting mechanism, the upper module is slidably arranged in the mounting space formed by frame, and in the mounting space, the clamping block for abutting with lower module to prevent lower module from separating from mounting space in the sliding direction of upper module is set, whereby lower module can be compacted in mounting space by upper module and docking, to complete the full-automatic replacement of glue gun mixed pipe, can greatly improve glue gun mixed pipe replacement efficiency, reduce the labor intensity of staff, while glue gun mixed pipe replacement frequency can be strictly guaranteed, avoid glue gun mixed pipe replacement too early or too late, when glue gun mixed pipe is replaced, the compacting force between upper module and lower module can be ensured by compacting mechanism, ensure that upper module and lower module are compacted in place, avoid artificial replacement glue gun mixed pipe when tightening not in place.

The utility model relates to the technical field of cutting equipment, in particular to a face milling cutter with a double-hole A-type blade, which comprises a face milling cutter body and a blade body, one side of the face milling cutter body is fixedly connected with a blade groove, the blade body is placed in the blade groove, a cutter body end face is arranged on the upper surface of the face milling cutter body, and the blade body end face is connected with the blade groove. A key groove is formed in the surface of the end face of the blade body, the twelve blade grooves are arranged in a circumferential array, a screw hole is formed in the surface of the blade body, an assembly hole matched with the screw hole is formed in the key groove, a positioning hole is formed in the surface of the blade body, the positioning hole penetrates through the end face of the blade, and a positioning hole is formed in the surface of the blade body. An inner hexagon screw counter bore is formed in the lower surface of the blade body. According to the scheme, the double-hole double-screw pressing blade is adopted, the pressing force is effectively guaranteed, the machining depth is increased, and the machining efficiency is improved.

This invention discloses a hydraulic clamp with a mechanical self-locking structure and its design method, comprising: a hydraulic cylinder and a hydraulic cylinder piston rod slidably disposed within the hydraulic cylinder; a self-locking assembly is disposed on the hydraulic cylinder, the self-locking assembly including a wedge-shaped locking pin, a push rod, a push-pull locking rod, and a wedge-shaped locking block; one end of the push-pull locking rod is axially connected to the push rod, and the other end is axially connected to the hydraulic cylinder piston rod; the wedge-shaped locking pin is disposed on the outer wall of the push-pull locking rod, the wedge-shaped locking block is sleeved on the outer side of the push rod, and the inner wall of the wedge-shaped locking block is provided with a wedge-shaped groove, the wedge-shaped groove being adapted to the shape of the wedge-shaped locking pin; the wedge-shaped locking pin extends from the push-pull locking rod to the wedge-shaped locking block, and the wedge-shaped locking pin is inserted into the wedge-shaped groove; when the hydraulic cylinder is cut off, the wedge-shaped locking pin and the wedge-shaped groove of the wedge-shaped locking block form a rigid engagement, the push-pull locking rod maintains the relative position of the push rod and the hydraulic cylinder piston rod, and the whole remains locked, achieving continuous clamping, eliminating the need for continuous oil supply of electricity / fuel consumption, and reducing energy costs.

The utility model relates to the technical field of pole piece battery production, and particularly discloses a pressing knife and a stacking table for preventing material pieces from deviating. The pressing knife comprises a pressing knife main body, the pressing knife main body comprises a connecting end and a pressing end; the thickness of the pressing end is smaller than that of the connecting end; the length of the pressing end is smaller than that of the connecting end. According to the scheme, the connecting end is used for being connected with various driving mechanisms for driving the pressing cutter to press; and the pressing end is used for pressing the material sheet. The thickness and the length of the connecting end are larger than those of the pressing end, so that the connecting end can provide stable support for the pressing end, and the pressing force of the pressing end on the material sheet is ensured. Meanwhile, as the thickness of the pressing end is smaller than that of the connecting end, the friction force between the pressing end and the material piece can be reduced, and then the offset of the material piece when the pressing knife body is pulled away is reduced.

The utility model relates to a blade bayonet processing tool for a supercharger. The blade bayonet processing tool is characterized by comprising a fixed base, a blade baffle, a blade jacking unit and a blade lifting block, the blade baffle structure attached to the outer contour of the blade of the supercharger is arranged, and the blade of the supercharger is pressed on the blade baffle through the blade jacking unit, so that the pressing force in the horizontal direction is guaranteed; the end part of the jacking unit is provided with a jacking block attached to the outer contour of the blade, so that surface contact is realized, and indentation is avoided; in addition, the arranged blade lifting block can be tightly attached to the bottom end of the blade, the bottom of the blade is prevented from being suspended, and it is guaranteed that deviation cannot be generated during machining; besides, the blade baffles, the blade lifting blocks and the jacking blocks are all of detachable structures and can be replaced so as to adapt to machining of different supercharger blades; according to the tool, the blade machining efficiency of the supercharger is improved, and the rejection rate is reduced.

The utility model relates to the technical field of plate heat exchangers, in particular to a plate heat exchanger plate installation structure which comprises a plate heat exchanger body, one side of the plate heat exchanger body is connected with a pressing rod in a penetrating and sliding mode, and one end of the pressing rod is fixedly connected with a pressing plate used for locking a plate. A plate piece pressing assembly used for rapidly moving a pressing plate is arranged on one side of the plate heat exchanger body, the plate piece pressing assembly comprises a supporting frame fixed to one side of the plate heat exchanger body, and a locking assembly used for limiting the plate piece pressing assembly is arranged on one side of the upper end of the supporting frame. Compared with the prior art, the problems that due to the fact that an existing plate heat exchanger plate installing and pressing structure is not provided with a rapid clamping assembly, the plate pressing time is long, and liquid in the plate leaks due to the fact that pressing force of all parts of a pressing plate is different are solved.

A fireproof airtight door, which relates to the technical field of airtight doors. It comprises: a door frame; a door leaf matched with the door frame; a clamping mechanism installed on the inner side of the door leaf, which moves toward or away from the door frame to press or release the door leaf on the door frame; a switch handwheel installed on the outer side of the door leaf, one end of which is connected to the clamping mechanism and is used to control the clamping mechanism to lock or unlock the door leaf; a lock installed on the door leaf close to the clamping mechanism and used to lock the clamping mechanism when the door leaf is in a locked state; and a quick opening mechanism installed on the inner side of the door leaf close to the clamping mechanism and the lock and used to drive the clamping mechanism to move in the unlocking direction after unlocking the clamping mechanism. The above technical solution has the advantages of easy indoor door opening operation and simple mechanism, and achieves the effect of rapid indoor door opening, which can well meet the requirements of fire escape.