117 results about "Square cavity" patented technology

The utility model provides a piezoelectric micro pump which comprises a pump body. The pump body is provided with a square cavity. The vibration isolation piece is horizontally arranged in the middle of the square cavity, the square cavity is divided into an upper cavity body and a lower cavity body which are independent, two holes are formed in the end walls of the upper cavity body and the lower cavity body in a penetrating mode respectively, and one hole is formed in the middle of the end wall of each cavity body; the one-way valve is arranged on one hole of the cavity; the actuator is attached to one face of the vibration isolation piece, and electric connection is formed on the attached face; and the deformation sheet is arranged on the other surface of the vibration isolation sheet. Compared with the prior art, the square cavity can provide a larger braking area for the actuator, so that the vibration amplitude is increased, the formed gas pressure is increased, and larger fluid pressure and flow are brought.

The invention provides a method for solving the natural convection problem of a two-dimensional square cavity, and the method comprises the steps: carrying out the grid division of the square cavity, so as to obtain the coordinate position of each discrete point in the square cavity; taking the coordinate position of each discrete point in the square cavity as input data, designing a physical information neural network in combination with discrete Fourier transform characteristics, and adding a hard constraint condition on the boundary of a to-be-solved equation of the two-dimensional square cavity natural convection problem; calculating a loss function for training the physical information neural network, embedding the to-be-solved equation into the loss function, performing iterative optimization on the network model of the physical information neural network based on the loss function and dynamically updating network parameters until the network model converges, and ending training; and predicting new input data by using the trained physical information neural network to obtain numerical solutions of a velocity field, a temperature field and a pressure field of the two-dimensional square cavity natural convection problem as output results. According to the method, the precision and convergence speed of solving the natural convection problem of the two-dimensional square cavity are improved.

An atomization core, an injection mold for an atomization core, an injection molding method, and an electronic cigarette. The atomization core comprises a porous body (310) and a heating net (331); the porous body (310) is provided with an atomization cavity (330) of a square cavity structure, the heating net (331) is embedded in the inner wall of the atomization cavity (330), and the end of the porous body (310) close to a vapor outlet thereof is provided with a circular vapor channel structure (320). Compared with traditional annular ceramic atomization core structures, the area of the internal heating net is increased, and the atomization amount is increased.

The present invention relates to a hydraulic four-jaw double-acting centering chuck, comprising a disc body, a clamping jaw, a sliding seat, a T-block, a wedge core sleeve 1 and a wedge core sleeve 2, the sliding seat is slidably mounted on the disc body, the clamping jaw is indirectly fixed on the sliding seat through the T-block, the opposing clamping jaws of the four clamping jaws form a group of two, the wedge core sleeve 1 and the wedge core sleeve 2 are installed inside the disc body, a cylindrical cavity is provided inside the disc body, the wedge core sleeve 1 is slidably mounted in the cylindrical cavity after being wedge-shaped with one group of clamping jaws, a square cavity is provided at the upper end of the wedge core sleeve 1, the wedge core sleeve 2 is slidably mounted in the square cavity after being wedge-shaped with another group of clamping jaws, and a double-acting oil cylinder on the same side is installed on a lathe, which independently pulls the wedge core sleeve 1 and the wedge core sleeve 2 respectively, and moves the two groups of clamping jaws opposite to each other to clamp a square workpiece. The two groups of clamping jaws of the present invention form a double-acting effect, and clamp from the sides of the breaker cylinder body respectively, which reduces the requirements for the operator to adjust the position of the clamping jaws, and can increase the service life of the oil cylinder at the same time.

The utility model provides an anti-mixing device which comprises a supporting plate with a hollow part, a feeding frame with an opening in the bottom of one side is arranged above the supporting plate, and the feeding frame communicates with the hollow part of the supporting plate; a baffle matched with the opening in the bottom of the feeding frame in size is arranged between the feeding frame and the supporting plate, one end of the baffle penetrates through the opening in the bottom of one side of the feeding frame, the other end of the baffle is connected to the movable end of a telescopic mechanism, and the telescopic direction of the movable end of the telescopic mechanism is parallel to the supporting plate. The device can be fixed at the upper end of a square chamber, collects scattered negative electrode materials during feeding, avoids the problem of material mixing, and can also automatically control opening and closing of the material conveying channel to prevent the negative electrode materials from overflowing from the chamber during feeding.

The invention provides an ultrathin heat insulation door body and a refrigerator, and relates to the technical field of refrigerator door bodies, the ultrathin heat insulation door body comprises a shell, a door liner, a vacuum heat insulation plate and a door body sealing strip, a through groove communicating with a cavity is formed in the middle of the second end of the shell, and the outer end of the door liner is fixedly connected with the inner wall of the shell; the outer wall of one side of the door liner and the inner wall of the first side of the shell form a square cavity, the outer side of the outer wall of the other side of the door liner and the inner wall of the second side of the shell form a concentric-square-shaped inserting groove, the vacuum heat insulation plate is arranged in the square cavity, and the door body sealing strip is connected with the concentric-square-shaped inserting groove in an inserted mode. According to the ultrathin heat insulation door body, only the vacuum heat insulation plate is adopted as a heat insulation material, the heat insulation performance of the door body can be improved, meanwhile, the door body is thin, the impact force of the appearance is large, and the occupied area of a refrigerator can be reduced.

The mixing tank comprises a tank body, a fixing plate is fixedly installed at the right end of the inner side wall of the tank body, an inclined face is arranged on the front side face of the fixing plate, a cover body is detachably installed at the top of the tank body, a feeding pipe is embedded in the left side of the top of the cover body, and a motor is fixedly installed in the middle of the top of the cover body; a contact rod is installed on the side wall of the rotating rod, a fixing plate with an inclined face is installed on the inner side wall of the tank body, the rotating rod can be driven by the motor to rotate, then the contact rod is made to conduct circular motion along with the rotating rod, the side wall of the contact rod makes contact with the inclined face, and therefore the contact rod can be driven to rotate. Furthermore, the rotating rod and the stirring rods are driven to move up and down, so that the auxiliaries between the two stirring rods are conveniently stirred and mixed, the mixing time is shortened, and the mixing efficiency is improved.

The present invention discloses a high-efficiency combined machining method for electric discharge material extraction. The tubular hollow electrode is used to drill holes in a workpiece at high speed, providing preparation for subsequent high-efficiency machining using a square tubular electrode. The square tubular electrode is a sleeve electrode with a certain wall thickness, which erodes the materials around the part where material extraction is required, leaving a groove with the same shape as the cross-section of the square tubular electrode on the workpiece after machining. The frame-shaped electrode can be annular, rectangular or L-shaped, which erodes the materials on the bottom surface of the square cavity. After machining with the frame-shaped electrode, the material core for material extraction will be separated from the workpiece matrix as a whole. In the process of machining the cavity by this high-efficiency material extraction method, only the materials around the cavity and on the bottom surface need to be eroded, greatly reducing the amount of eroded materials, lowering the machining cost and shortening the machining cycle.

The utility model discloses a detachable plate heat exchanger shell which comprises a bottom shell plate, a top shell plate is fixedly installed at the top ends of a left shell plate, a right shell plate and a rear shell plate, a front cover plate is rotatably installed at the front end of the top shell plate, and a plurality of heat exchange plates are installed in a cavity formed by the bottom shell plate, the left shell plate, the right shell plate, the rear shell plate and the top shell plate. The inner side of the left shell plate is spirally connected with a heat exchange plate closer, the bottom shell plate, the left shell plate, the right shell plate, the rear shell plate and the top shell plate jointly form a square cavity, a plurality of heat exchange plates can be inserted into the cavity in parallel, and the heat exchange plates can be attached to one another to form a closed heat exchange channel by screwing the heat exchange plate closer. The heat exchange plate at the leftmost end is provided with a bent pipe, so that liquid or gas can circularly flow, the heat exchange plates can be quickly disassembled through reverse operation, protection can be provided by closing the front cover plate, and the device has the capacity of being convenient to install, disassemble and protect.

The invention relates to a satellite payload cabin with platform and payload integrated design, belonging to the field of aerospace technology and equipment; a south plate, an east plate, a north plate and a west plate are butted end to end in sequence to form a square cavity structure; a counter floor is horizontally covered on the top of the square cavity structure; an external space camera is arranged at the center of the upper surface of the counter floor; a middle partition is vertically arranged in the inner cavity of the square cavity structure; the east partition is perpendicular to the middle partition, and the axial ends of the east partition are respectively butted with the middle of the east plate and the middle of the middle partition; the west partition is perpendicular to the middle partition; four heat conducting pipes are grouped in pairs, and two groups of heat conducting pipes are butted to form a U-shaped heat conducting pipe group; the payload cabin of the invention has a compact structure, comprehensively considers the structural support and heat dissipation requirements of the space camera and the satellite design, gives full play to the advantages of the whole satellite structure and thermal control, realizes the integrated design of the space camera and the satellite structure and thermal control, and meets the requirements of reliable support and high-precision temperature control of the space camera.

This invention provides a mobile wind tunnel device capable of outputting uniform droplets, belonging to the field of icing and anti-icing technology for ships and marine structures. The device includes: a stabilizing rectangular cavity and a transitional circular-to-square cavity, the stabilizing rectangular cavity and the transitional circular-to-square cavity being connected. The circular opening of the transitional circular-to-square cavity is connected to a variable frequency fan. A honeycomb rectifier and multiple airfoil spray frames are installed inside the stabilizing rectangular cavity, with the honeycomb rectifier located between the variable frequency fan and the airfoil spray frames. This mobile wind tunnel achieves uniform droplet output, maintaining a stable airflow field through the honeycomb rectifier; by arranging heating tape in the water and air pipes inside the airfoil spray frames, the wind tunnel device can operate for extended periods in low-temperature environments without icing; and a control cabinet controls wind speed, water pressure, and air pressure to obtain icing data for the ship's superstructure under different wind speeds and droplet diameters.

A stove combustion assembly comprises a center fire cover and a fire distributor seat, and the fire distributor seat comprises a center fire cover seat with an upper opening, a center air inlet connector, an outer ring air inlet cavity, an outer ring air inlet connector, a radial fuel gas channel, an axial secondary air channel, an outer ring fuel gas groove and an outer ring fire cover part. The radial gas channel is communicated with the outer ring gas inlet cavity and the outer ring gas groove, and acute included angles are formed between bottom plates of the radial gas channel and the outer ring gas groove and the horizontal plane of the radial outer side. The top of the outer ring fire cover part is in a curved surface shape and is sequentially provided with a bottom right trapezoid cavity, a square cavity, a top straight trapezoid cavity, a lower outer ring combustion hole group communicated with the waist of the bottom right trapezoid cavity, an upper outer ring combustion hole group communicated with the square cavity and an inner ring combustion hole group communicated with the waist of the top straight trapezoid cavity from bottom to top; and the central fire cover seat supports the central fire cover. The distributor seat and the outer ring fire cover part are integrated, and the combustion holes in the outer ring fire cover part are long, so that flame stabilization and backfire prevention are realized.

The utility model provides an integrated waterproof valve of an air inlet system, which relates to the technical field of waterproof valves and comprises an air inlet machine body, an air inlet groove is arranged on one side wall of the air inlet machine body, an embedding groove is arranged on the inner wall of the bottom of the air inlet groove, an arc hole is arranged on the inner wall of the bottom of the embedding groove, a square cavity is arranged inside the air inlet machine body, and the square cavity is communicated with the embedding groove. And the other end of the arc hole communicates with the square cavity, and a hydraulic rod is embedded and fixedly connected to the inner wall of the top of the air inlet groove. The waterproof valve and the air inlet of the air inlet system are integrated, the effect of reducing connecting points can be achieved, the effect of reducing the fault risk can be achieved, the overall reliability of the system can be improved, meanwhile, when the water stain sensor senses water stains, signals can be transmitted to the controller, and the controller is controlled to control the water stain sensor. At the moment, the controller can control the hydraulic rod to push the blocking block to descend to block the interior of the caulking groove, the waterproof effect can be achieved again, and therefore the effect of improving the waterproof performance can be achieved.

The present invention discloses an artificial surface plasmon absorbing grid, method and air intake, which belong to the field of stealth technology of air intake system; the absorbing grid is composed of a plurality of square cavity unit arrays, the square cavity unit is a square ring cavity, and its circumferential wall surface is a multi-layer dielectric structure, and the wall surface is a frequency selective surface FSS, a synthetic resin PR, and a polyester resin PET from the inside to the outside, and each layer is placed in parallel; wherein the polyester resin PET of adjacent square cavity units is bonded by an indium tin oxide ITO film to form an artificial surface plasmon absorbing grid. The purpose of the present invention is to change the electromagnetic scattering characteristics of the air intake, reduce its radar scattering cross-sectional area, and thus improve the radar stealth performance of the aircraft.

The present invention provides an automatic energy storage preinstalled box-type substation, comprising a metal box body, wherein electrical equipment and an automatic control device are arranged inside the metal box body, an energy storage device is arranged inside the base of the metal box body, a temperature detection device is arranged inside the metal box body, an annular support with a square cross-section cavity is arranged at the upper end of the side wall inside the metal box body, one side of the annular support is fixed on the side wall of the metal box body, and an annular guide rail with a rectangular cross-section is fixedly arranged on the other side, wherein the square cavity of the annular support is divided into two left and right chambers, namely a left chamber and a right chamber, a heater and a liquid level sensor are arranged at the bottom end of the left chamber, and a heat sink is arranged outside the bottom end of the annular support and located in the left chamber; a cooling water tank is slidably arranged on the annular guide rail, and an atomizing nozzle is arranged at the outer lower end of the cooling water tank.

The invention provides an air spring low-frequency vibration isolation device based on turn-back type square cavity flow, which comprises an air spring main air chamber, an additional air chamber, a mass block and a turn-back type square cavity throttle pipe, the mass block is connected with the upper end of the air spring main air chamber, the additional air chamber is connected with the lower end of the air spring main air chamber, and the turn-back type square cavity throttle pipe is connected with the mass block. The turn-back type square cavity throttling pipe is arranged in the main air chamber and the auxiliary air chamber of the air spring, and air in the main air chamber of the air spring can flow into or flow out of the auxiliary air chamber through the turn-back type square cavity throttling pipe. According to the air spring, the turn-back type square cavity throttling pipes are arranged in the main air chamber and the auxiliary air chamber of the air spring in the vertical direction, so that air in the main air chamber of the air spring can flow into or out of the auxiliary air chamber through the turn-back type square cavity throttling pipes; the gas can form an airflow vortex in the square cavity of the turn-back type square cavity throttle pipe, so that energy consumption is increased, vertical low-frequency micro-vibration is effectively isolated, and vibration isolation performance is improved.

The utility model relates to an efficient heat dissipation blower shell in the blower field, which comprises an assembly shell, the assembly shell comprises a left piece and a right piece which are assembled through a buckle structure on the inner side of the assembly shell, the upper side of the interior of the assembly shell is provided with a first square cavity, and the top of the assembly shell is provided with a second square cavity; a first square cavity and a second square cavity are formed in the shell body, an assembly plate is inserted into the first square cavity, a cover plate is inserted into the second square cavity, heat dissipation holes are formed in the assembly plate, and heat dissipation fins are welded to the inner side of the assembly plate. And the assembly plate is limited through the limiting corner connector and the limiting shifting piece, so that the heat dissipation area is increased through the heat dissipation fins when the blower is used, heat can be effectively dissipated out, and the heat dissipation efficiency is improved.

The invention discloses a novel sheet-type double-layer jack terminal and a connector, and relates to the technical field of connectors, the novel sheet-type double-layer jack terminal comprises a terminal sample plate which is integrally punched and formed, the head part of the terminal sample plate is a reed area, the middle part of the terminal sample plate is a square cavity area, the tail part of the terminal sample plate is a connecting area, and when the terminal sample plate is bent, two layers of reeds which are symmetrical up and down are formed in the reed area; an insertion space used for being matched with a contact pin is formed between the two layers of reeds which are symmetrical up and down. According to the terminal provided by the invention, the reed area of the integrally punched and formed terminal sample plate is bent to form the two layers of reeds which are symmetrical up and down, so that the two layers of reeds which are symmetrical up and down are of an integrally connected structure and do not need to be connected through rivets, the contact resistance between the two layers of reeds which are integrally connected is effectively reduced, and the service life of the terminal is prolonged. The contact resistance between the upper reed and the lower reed is further reduced, the current-carrying capacity of the terminal is improved, and the technical problem that large contact resistance still exists between the upper reed and the lower reed due to the fact that the upper reed and the lower reed of an existing terminal are connected through a rivet is solved.

The invention discloses a storage rack for tool plates in low-voltage wire harness production, and relates to the technical field of low-voltage wire harness tool plate storage, the storage rack comprises a hollow air cushion, the hollow air cushion is a square rubber body with a square cavity inside, and a circular suction hole is formed in the top of the hollow air cushion; according to the storage rack for the tool plates in the low-voltage wire harness production, hollow air cushions are arranged on the layering plates to elastically support the bottoms of the tool plates, and the situation that due to the fact that the hardness of a rack body of the storage rack is large, the tool plates are damaged and influenced to a certain extent when the rack body is in dragging type friction contact with the tool plates is prevented; when the periphery of the hollow air cushion bends and protrudes outwards, the circular air holes are folded in half, so that an approximately closed area is formed in the hollow air cushion to form a certain negative pressure, and a certain suction force is generated on the tool plate; the situation that when the tool plate is large in area and placed in the frame-shaped frame body, the part, exposed out of the frame-shaped frame body, of the tool plate is prone to being affected by external force and deviates or topples is prevented.

The utility model relates to a novel balance plate which comprises a balance plate body. A first sound absorption layer, a sound insulation layer and a second sound absorption layer are sequentially arranged in the balance plate body from top to bottom. A fastener is fixedly arranged at the bottom of the balance plate body; according to the utility model, the first sound-absorbing layer in the shape of the triangular cavity, the sound-insulating layer in the shape of the Chinese character'hui 'and the second sound-absorbing layer in the shape of the square cavity are arranged, so that a bidirectional sound-insulating and sound-absorbing effect can be achieved, and the overall use feeling of the heat-insulating plate can be improved.

The utility model discloses a connecting structure of a composite material frame, which comprises a frame and a corner brace, the frame is a square tube structure, a square cavity is arranged in the square tube structure, the corner brace is a right-angle corner brace, the corner brace is provided with two right-angle sides, the inner side of each right-angle side is provided with a row of inclined teeth which are inclined inwards, and the inner side of each right-angle side is provided with a row of inclined teeth which are inclined inwards. The thickness of each right-angle side is larger than the inner width of the corresponding square cavity, in the state that the two right-angle sides of the corner connector are inserted into the square cavities of the two frames respectively, the outer side edges of the right-angle sides are clamped to the outer walls of the square cavities, and the oblique teeth on the right-angle sides are clamped to the inner walls of the square cavities.

The utility model relates to a waterproof structure, in particular to a modularized waterproof protection plate device. Comprising an open cube frame body, an inner cavity of the cube frame body is divided into a plurality of small square cavities distributed in a latticed mode through a plurality of vertical partition plates which are arranged in a criss-cross mode, the interior of each small square cavity is divided into an inner cavity and an outer cavity through a transverse partition plate, one cavity is a closed cavity, and the other cavity is a closed cavity. One cavity is a closed cavity, a pressure air capsule is placed in the closed cavity, the other cavity is an open cavity, a steel wire is arranged in the middle of the open cavity, and a high-strength cementing material is poured in the open cavity; the outermost side of the device is a high-strength cementing material, the middle part of the device is a pressure air capsule buffer heat-insulating layer, and the inner side of the device is a special non-cured asphalt waterproof layer, so that a three-layer protection effect on a coiled material waterproof layer is achieved, the assembly type installation construction can be realized, the construction process is simplified, and the investment of manpower, materials and construction period is reduced.

The application discloses a preparation method, product and device of a square core optical fiber preform. The preparation method comprises the following steps: (1) making the rotating central axis of a Leilo triangular drill bit coaxial with the geometric central axis of a circular cavity cladding sleeve, and drilling a rounded square with the width d as the side length by using the Leilo triangular drill bit to obtain a square cavity cladding sleeve; (2) sleeving a square core rod with the width d' into the square cavity cladding sleeve, and stretching or fusing the square core rod into a circular solid rod; and (3) manufacturing the square core optical fiber preform according to the designed shape size and refractive index profile. The Leilo triangular drill bit is designed according to the width fixing principle of the Leilo triangular structure, and can be used for square hole processing of brittle materials such as quartz glass. The optical fiber prepared by using the square core rod and the square hole sleeve combination drawing reduces the probability of uncontrollable core-cladding interface air line occurrence caused by the original square core rod and circular sleeve combination drawing, and guarantees the reliability of the optical fiber.

The invention relates to the technical field of large-size silicon carbide saggar dry-method mechanical pressing, and discloses a large-size thin-wall silicon carbide saggar dry-method mechanical pressing method and a large-size thin-wall silicon carbide saggar dry-method mechanical pressing forming die. The large-size thin-wall silicon carbide saggar dry-method mechanical pressing forming method comprises the steps that firstly, silicon carbide saggar raw materials are treated; step 2, processing and mounting a mechanical pressing forming frame and a movable block; step 3, positioning the loose piece; step 4, intervening the distribution of the mixed fine powder; 5, layered material distribution and pressing of the raw materials; and sixthly, the large-size thin-wall silicon carbide saggar is demolded. The invention discloses a dry-method mechanical pressing forming die for a large-size thin-wall silicon carbide saggar. The mechanical pressing die comprises a die sleeve I and a die sleeve II, the outer side wall of the die cavity is tightly attached and fixed to the interior of a square cavity defined by the first die sleeve and the second die sleeve. And the mechanical pressing forming frame is mounted in the mold cavity. The method has the beneficial effects that the forming strength and the density distribution uniformity are improved, so that the thermal shock stability is improved, and the defects of unfilled corners and pitted surfaces which are easy to generate during demolding are reduced.

This invention discloses a semi-circular lithium metal electrolytic cell, belonging to the field of electrolytic cell technology. It includes a shell with interconnected semi-circular and square cavities inside. The square cavities gradually narrow from the connection points of the semi-circular cavities, and the ends of the square cavities furthest from the semi-circular cavities are connected by arc-shaped corners. The cathode is located inside the square cavity of the electrolytic cell, and the anode is installed at the top of the electrolytic cell and extends into the cathode cavity. This invention relies on the magnetic-thermal field generated by the graphite anode group within the square cavity to drive the molten salt electrolyte to generate a flow field. The varying spacing of the square cavities within the inner shell drives the lithium metal liquid to flow into the semi-circular cavity, while the arc-shaped corners prevent any residual lithium metal liquid.

The utility model relates to the technical field of power distribution network operation detection, in particular to an electric power system power distribution network operation detection device which comprises a detection device body and a fixing block, the fixing block is fixedly connected to one end of the detection device body, and one end of the detection device body is provided with an adsorption part. The adsorption part comprises a gas collection cavity, suction cups, square cavities, piston plates and communicating pipes, the gas collection cavity is fixedly connected to the side wall of the detection device body, the two suction cups communicate with the gas collection cavity, the two square cavities are fixedly connected to the two ends of the detection device body correspondingly, and the piston plates communicate with the two square cavities; the interior of the square cavity can be in a negative pressure state when the piston plate moves upwards, and the square cavity is communicated with the square cavity through the communicating pipe, so that the suction cup can be more stably adsorbed on the outer surface of a rod of the power distribution network, and the fixing effect on the detection device body is achieved.

The utility model relates to the technical field of tables, in particular to a table capable of being quickly disassembled and assembled, which comprises a table top assembly, a table top assembly and a table top assembly, the supporting assembly comprises two symmetrical table legs and mounting discs fixedly arranged at the top ends of the two table legs respectively; the connecting assembly comprises two symmetrical square inserting grooves formed in the lower surface of the bearing beam, and square inserting blocks which are fixedly arranged on the upper surfaces of the two mounting discs correspondingly and correspond to the square inserting grooves; the connecting assembly further comprises a square cavity formed in the bearing beam and two symmetrical square positioning columns arranged on the inner wall of the square cavity in a sliding mode, and square positioning holes matched with the two square positioning columns are formed in the surfaces of the two square inserting blocks correspondingly. Through the arrangement of the connecting assembly, the table can be quickly mounted and dismounted, so that the defects of waste of transportation space and transportation cost in the prior art are effectively overcome.

The utility model discloses a clamp for waterproof material detection, relates to the technical field of clamps, and aims to solve the problems that in the prior art, when waterproof materials are clamped and fixed, workers need to manually rotate a rotating handle for operation, the labor amount of the workers is increased, the working efficiency is reduced, and the practicability is poor. A fixed arm is installed below one side of the back plate, a movable arm is arranged on one side of the back plate along the upper portion of the fixed arm, a fixed block is arranged above the movable arm, a top plate is fixedly installed above the fixed block, the top plate is fixedly connected with the back plate through a screw, a square cavity is formed in the fixed block, and the top plate is fixedly connected with the back plate through a screw. A top block is arranged on the upper portion of the interior of the square cavity, a first spring is fixedly installed below the top block, a bottom block is fixedly installed below the first spring, the lower end of the bottom block extends out of the interior of the fixed block and is fixedly connected with the movable arm, a slot is formed in one side of the top block, and a side box is fixedly installed on one side of the fixed block.

The utility model relates to the field of engineering equipment, in particular to a ventilation box for feeding pressure reduction of a stirring main machine, which comprises a ventilation box body and an air jet assembly, the ventilation box body is a square cavity body with a downward opening, and the upper part of one side wall of the ventilation box body is provided with a ventilation hole; the air injection assembly is provided with injection rings capable of intensively injecting high-pressure air flow towards different directions around, and the injection rings are arranged in the cavity of the ventilation box body and can inject the high-pressure air flow towards the inner wall of the ventilation box body. According to the utility model, the ventilation box is improved, the jet ring of the air jet assembly, which can densely jet high-pressure air flow towards different directions, is suspended in the cavity of the ventilation box body, and the high-pressure air flow jetted by the jet ring can be used for strongly blowing air to the inner wall of the ventilation box body so as to clean residual pulp on the box wall and air-dry the box wall; the ventilation box body can be kept unobstructed, so that air in the cavity of the stirring main machine can be quickly exhausted to realize pressure reduction when the stirring main machine is used for feeding.

The utility model relates to a cloth rolling device for a knitted fabric heat-setting machine, which belongs to the technical field of knitted fabric rolling, and comprises a mounting seat, a cloth roller, two setting rollers and an adjustment assisting structure, the top of the mounting seat is fixedly connected with a mounting frame, a square cavity is arranged in the mounting frame, and the adjustment assisting structure comprises a gear and two T-shaped plates. The gear is rotatably connected to the interior of the square cavity, the connecting plate is pulled through the handle, the connecting plate releases or fixes the position of the T-shaped plate through the four connecting rods, the two inner plates, the spring and the anti-moving column, one connecting column is pulled, the connecting column drives the other toothed plate to move in the opposite direction through the T-shaped plate, the toothed plate and the gear which are connected with the connecting column, and therefore the T-shaped plate can move in the opposite direction. The two T-shaped plates and the two connecting columns move relatively, the two connecting columns drive the sliding blocks to move so that the cloth roller can be clamped in the clamping holes or clamping of the cloth roller can be relieved, and therefore the cloth roller can be rapidly disassembled and assembled, and the replacement efficiency of the cloth roller is effectively improved.