798results about How to "Prevent intrusion" patented technology

The invention relates to the technical field of underground building foundation reinforcement and leakage prevention, in particular to an underground building foundation reinforcement and leakage prevention integrated device and method.The device comprises a movable rack, and a jolt ramming mechanism and an air drying mechanism are installed on the movable rack; the primarily-coated coating is impacted and compacted through the first compaction block and the second compaction block, the waterproof coating is powerfully pressed into holes in the inner wall of the foundation pit, a deeply-fused tight bonding layer is formed, and the interface bonding force and adhesive force between the waterproof coating and the inner wall of the foundation pit are greatly enhanced in the process; and the defect of insufficient bonding strength in the prior art is effectively overcome, so that the phenomena of peeling, cracking and overall falling of the waterproof coating in the later period are fundamentally prevented.

This invention discloses a wind-cooled multi-channel solid-state circuit breaker cabinet, comprising a cabinet body and a wind-cooling heat dissipation system. The cabinet interior is divided layer by layer from front to back by longitudinal beams into an isolation zone, a first component mounting zone, a heat dissipation zone, and a second component mounting zone. The wind-cooling heat dissipation system includes air inlets at the bottom of the front and rear doors and air outlets at the top, as well as a heat dissipation structure located within the heat dissipation zone. The heat dissipation structure includes a radiator duct and optional fan assemblies, which can be flexibly configured according to power switching components with different thermal powers to achieve precise and efficient heat dissipation. Each electrical channel has an independent control panel corresponding to the front door, integrating a display screen, indicator lights, and buttons, supporting independent on / off control of multiple circuits. This invention, through reasonable functional zoning and air duct design, solves the problems of low heat dissipation efficiency and poor multi-circuit adaptability in existing technologies, and has the advantages of high heat dissipation efficiency, reasonable layout, convenient operation and maintenance, and good protection.

The utility model relates to a flexible flame-retardant indoor photoelectric composite cable with a multilayer composite compression-resistant structure, which comprises a central supporting unit, a cable core assembly, a composite reinforcing layer, a flame-retardant layer and an outer sheath which are sequentially arranged from inside to outside, the adjacent elastic rods are bonded through hot melting to form a 90-degree orthogonal supporting structure, the cable core assembly comprises optical fiber units and power conductors which are symmetrically distributed in four quadrants of a central supporting unit, one optical fiber unit and one power conductor are arranged in each quadrant, and the four macromolecule elastic rods arranged in a cross shape form a supporting framework. A stable internal supporting structure is provided for the whole optical cable, it is ensured that the optical cable structure is not prone to deformation in a complex environment, the section of the macromolecule elastic rod is fan-shaped, the containing groove is filled with thixotropic silica gel, the buffering and damping effect is further enhanced, internal assemblies can be better protected, and the optical cable is suitable for different installation and use environments.

The invention provides a pressure-bearing annular sealing device suitable for a nuclear island containment vessel and an installation method of the pressure-bearing annular sealing device. The sealing device comprises a first supporting mechanism, a sealing mechanism and a second supporting mechanism, one end of the first supporting mechanism is connected with the steel containment, the other end of the first supporting mechanism extends towards the wall of the shielding plant, one end of the second supporting mechanism is connected with the wall of the shielding plant, the other end of the second supporting mechanism extends towards the steel containment, and the first supporting mechanism and the second supporting mechanism are correspondingly arranged in the circumferential direction of the steel containment and form an annular mounting gap; the sealing mechanism is connected to the annular mounting gap in a sealing mode and comprises elastic buffering pieces arranged in the axial direction and the radial direction of the steel containment correspondingly, and the elastic buffering pieces abut against the position between the first supporting mechanism and the second supporting mechanism correspondingly.

This invention provides an LED chip and a light-emitting device. The LED chip can effectively prevent moisture intrusion and protect the LED electrodes by a passivation layer disposed on the surface of the epitaxial stack away from the substrate and extending to the sidewall of the electrode.

The invention relates to the technical field of Internet of Things communication, discloses an Internet of Things multi-Android client state synchronization method, and solves the problems of poor state consistency, high back-end dependence, large delay and insufficient compatibility in the prior art. According to the scheme, the method comprises the steps that after a client completes initialization, MQTT connection with a rear end is established, an MQTT state message pushed by the rear end is monitored, after the message is received, equipment state information is obtained through analysis, local state cache and a UI interface are updated, meanwhile, the client serves as a distribution node, a UDP synchronization message containing the equipment state and the IP of the distribution node is established, and the UDP synchronization message is sent to the client. The UDP synchronization message is broadcasted to the local area network, other clients in the local area network receive the UDP synchronization message and then verify whether the distribution node IP is the client in the local area network, if the verification is passed, the message is analyzed, the state updating timestamp and the local cache timestamp are compared, and the local state cache and the UI interface are updated only when the state updating timestamp is larger.

The utility model relates to the technical field of solid state disks, in particular to an SSD (Solid State Disk) with a waterproof function. The SSD with the waterproof function comprises a bottom plate, a protective cover, a mounting seat, a memory bank, an insertion port, a contact seat, a sealing strip, a connecting line row and a silica gel ring, the protective cover covers the top of the bottom plate, the mounting seat is mounted at the top of the bottom plate, the memory bank is arranged on the mounting seat, the insertion port is arranged on the right side of the mounting seat, and the contact seat is arranged on the connecting line row. A contact seat is arranged on the right side of the memory bank, a sealing strip adheres to the bottom of the contact seat and makes close contact with the memory bank, a connecting line row is arranged on the right side of the contact seat, and a silica gel ring adheres to the interior of the plug-in opening. The sealing strip is tightly attached to the memory bank to prevent water vapor from invading the circuit interface; the connector is inserted into the plugging port, so that the silica gel ring is pressed and deformed, a gap between the connector and the plugging port is filled, a liquid permeation path is blocked, the waterproof purpose is achieved, and it is avoided that water vapor enters the SSD and is affected with damp, and normal use is affected.

The utility model relates to the technical field of bearings, and discloses a liquid-lubricated heavy-duty bearing mechanism which comprises an outer ring, an inner ring is arranged in the outer ring, a limiting ring is arranged on the inner wall of the inner ring, a ball is arranged in the inner ring, a push rod is slidably connected in the inner ring, the bottom end of the push rod is fixedly connected with a connecting plate, and the bottom end of the connecting plate is fixedly connected with a piston rod. A tension spring is fixedly connected to the upper surface of the connecting plate, a transmission frame is fixedly connected to the lower surface of the connecting plate, a sliding rod is slidably connected to the outer wall of the transmission frame, a positioning rod is slidably connected to the outer wall of the sliding rod, a telescopic rod is fixedly connected to the outer wall of the sliding rod, and an oil conveying assembly is arranged in the inner ring. According to the utility model, through the cooperation of the push rod, the connecting plate, the tension spring, the transmission frame, the sliding rod, the telescopic rod and the positioning rod, the limiting ring is mounted and dismounted, the balls are limited or released, and local stress concentration of the balls is avoided, so that the overall bearing capacity of the bearing is improved.

The utility model discloses a full-bore eccentric ball valve with a flow guide hole, which relates to the technical field of ball valves and comprises a valve body, a valve rod, a valve core and a sealing body, the flow guide hole is arranged on the valve core, sealing air bag rings are arranged on the valve core and positioned at openings at two ends of the flow guide hole, and an inflating component connected with the sealing air bag rings is arranged outside the valve core. A sleeve is arranged outside the valve element, the valve rod is rotationally connected to the sleeve, a reset spring is connected between the sleeve and the valve rod, and an extrusion piece used for extruding the inflation assembly is arranged on the valve rod. When the valve is opened, the two ends of the flow guide hole are sealed with the openings in the two sides of the valve body respectively, so that a medium is prevented from rushing into a cavity between the valve body and the valve element in the process of passing through the flow guide hole, vibration and noise generated by the valve in the medium circulation process are effectively reduced, and the service life of the valve is prolonged. And meanwhile, the flowing resistance of the medium can be reduced to a certain extent, and the stability of the medium passing through the valve is improved.

The utility model relates to the technical field of battery installation, and discloses a new energy automobile battery pack and automobile body integrated connecting structure which comprises a chassis fixing frame, an adjusting mechanism is arranged on the chassis fixing frame, an auxiliary mechanism is arranged on the adjusting mechanism, and the adjusting mechanism comprises a top hole. The top hole is formed in the inner wall of the top of the base plate fixing frame, the inner wall of an inner ring of the top hole is in threaded connection with a fixing screw, the outer wall of the bottom of the base plate fixing frame is fixedly connected with a T-shaped frame, a penetrating hole is formed in the inner wall of the front side of the T-shaped frame, the inner wall of the top of the T-shaped frame is slidably connected with a concave frame, and butt joint holes are formed in the outer walls of the front side and the rear side of the T-shaped frame. According to the utility model, the convenient installation and stable connection of the battery pack rack and the vehicle body are realized through the structural design, and the use amount of fixing parts is reduced by utilizing the guiding and limiting effects of a specific structure, so that the disassembly and assembly process is simplified, the maintenance time is shortened, and the protection performance can be enhanced through the sealing part.

The utility model discloses an outdoor fishing lamp with waterproof function, including fishing lamp body and the charging port of setting at one side of fishing lamp body, the position of fishing lamp body and located charging port outside is provided with waterproof assembly no.

This utility model discloses a relay protection pressure plate device, including a relay protection pressure plate body. Two sets of connector bodies are fixedly connected to the upper surface of the relay protection pressure plate body, and a sealing mechanism is fixedly connected to the upper surface of the relay protection pressure plate body. A limit mechanism is fixedly connected to the outer surface of the sealing mechanism. The sealing mechanism includes a sealing shell fixedly connected to the upper surface of the relay protection pressure plate body, a fixed shell slidably connected to the inner wall of the sealing shell, and a rotating shell fixedly connected to the other end of the fixed shell. This convenient relay protection pressure plate device belongs to the field of relay protection technology. This convenient relay protection pressure plate device, through the multi-layer shell structure of the sealing mechanism and the cooperation of the sliding sealing plate, can effectively block the intrusion of external factors such as dust and moisture, protect internal components, and the arc-shaped chamfer design of the fixed shell eliminates the risk of jamming, ensures smooth sealing operation, and improves circuit adjustment efficiency.

The embodiment of the utility model discloses a connecting structure of an electromagnetic valve and a thermocouple. The connecting structure comprises the thermocouple and the electromagnetic valve. The thermocouple comprises a thermosensitive probe and a plug connector, the thermosensitive probe is connected with the plug connector through a wire, and a protective sleeve is arranged on the plug connector; a valve body of the electromagnetic valve comprises a guide sleeve and a contact pin, and the contact pin is in plug-in fit with the plug connector; wherein the protective sleeve is sequentially divided into a first section, a second section and a third section in the axial direction, the first section wraps one part of the wire, the second section wraps the connecting part of the plug connector and the wire, and the third section is provided with an opening and used for being connected with the guide sleeve in an inserted mode and wrapping the guide sleeve. The utility model provides a connecting structure of an electromagnetic valve and a thermocouple so as to improve the sealing performance, the oxidation resistance and the overall reliability of a connecting part under complex working conditions and prolong the service life of a device.

The utility model relates to the field of feed processing especially relates to a mixed fermentation tank for feed production, including box, stirring frame, air pump and silica gel diaphragm vane, the inside of box is equipped with stirring frame, the lower extreme of box is equipped with air pump, the surface of stirring frame is equipped with silica gel diaphragm vane, the inside bottom of box is equipped with mounting post, the upper end fixed of mounting post has sealed bearing, the inner ring rotating end of sealed bearing is fixedly connected with stirring frame, the inside of stirring frame is equipped with gas path and is linked with silica gel diaphragm vane, the inside of mounting post is also equipped with gas path and is linked with air pump. The device can realize the different realization adjustment silica gel diaphragm vane of more feed viscosity and the effect of auxiliary full -scale stirring, has solved the problem that the single stirring mode of the existing feed fermentation tank stirring system stirs, easily damages the surface structure of feed.

The utility model belongs to the technical field of circuit breakers, and particularly relates to a molded case circuit breaker based on the Internet of Things. The circuit breaker comprises a circuit breaker body and further comprises a sealing mechanism, an end protection piece and a fixing piece, U-shaped installation notches are formed in wiring positions of the two ends of the circuit breaker body, limiting sliding grooves are formed in the two opposite sides of the installation notches, and the two sides of the sealing mechanism are limited in the limiting sliding grooves in a sliding mode; the sealing mechanism is detachably connected with the circuit breaker main body through a fixing piece, and a wire is arranged in the end protection piece in a penetrating mode. According to the circuit breaker device, the wiring end of the wire is protected in a hidden mode through the end protection piece, aging and corrosion caused by wind and sunlight are avoided, dustproof protection is conducted on the wiring position of the circuit breaker through cooperation of the end protection piece and the sealing mechanism, and therefore the stability and reliability of the circuit breaker device are effectively improved, and the service life of the circuit breaker device is prolonged.

A surface acoustic wave (SAW) device includes: a piezoelectric layer; an interdigitated electrode structure located on the piezoelectric layer; a wiring layer located on the piezoelectric layer and electrically connected to the interdigitated electrode structure; an interconnect layer located on the wiring layer; bumps located on the interconnect layer; and a metallization structure located between the interconnect layer and the bumps, electrically connecting the interconnect layer and the bumps and preventing material from the bumps from penetrating into the interconnect layer. The metallization structure on the interconnect layer prevents the bumps from directly contacting the interconnect layer, instead connecting them electrically through the metallization structure. This prevents the material of the bumps from fusing with the material of the interconnect layer and intruding into the device, thus preventing semiconductor device failure and improving the performance of the semiconductor device. Furthermore, the metallization structure's location between the bumps and the interconnect layer enhances the adhesion between the bumps and the interconnect layer.

The utility model relates to a cable wire duct for photovoltaic power generation, which belongs to the technical field of cable wire ducts, and comprises a duct body and a bayonet socket fixedly connected to one end of the duct body, a plurality of groups of limiting rods are fixedly connected in the duct body, fireproof parts are attached to the adjacent sides of each group of limiting rods, and the fireproof parts are fixedly connected with the bayonet socket. The top of the groove body is connected with a groove cover through an inserting assembly, and heat dissipation holes are formed in one side of the groove body. According to the utility model, through cooperative use of the fireproof separator plate, the fireproof bag and the organic plugging material, the organic plugging material tightly wrapping the outer surface of the cable can form a physical barrier, thereby preventing moisture, dust, corrosive gas and the like from invading the surface of the cable, preventing an insulating layer from being damped and aged or a metal conductor from being oxidized and rusted, and prolonging the service life of the cable; and the arrangement of the fireproof partition plate and the fireproof bag can prevent fire spreading and smoke generated by fire from corroding other parts of the cable when the cable is on fire, so that the cable is well protected.

This utility model discloses a storage box for radio frequency coaxial connectors, including a base. A hollow support rod is fixedly connected to the top of the base. Multiple connecting posts are fixedly connected to the outer wall of the support rod. A placement tray is fixedly connected to one end of each of the multiple connecting posts. A sponge pad is fixedly connected inside each of the multiple placement trays. Multiple conical placement holes are evenly opened on the top of each of the multiple sponge pads. A round cover is slidably connected to the top of each of the multiple placement trays. Air passages are opened on the outer wall of each of the multiple round covers. This utility model allows for initial positioning of multiple radio frequency coaxial connectors through the conical placement holes, preventing displacement during storage. The rotating round cover, combined with the expansion design of the rubber airbag, can flexibly compress and fix the connectors from the top, avoiding mutual collision and compression caused by vibration during handling and transportation. This protects the shell, contacts, and other precision components from wear or deformation, ensuring signal transmission performance.

The application belongs to the technical field of switches and discloses a dustproof and moistureproof sealing device for a communication switch port, which comprises a switch body, a sealing cover is arranged at the tail end of the switch body, and mounting legs are welded at the opening end of the sealing cover. The application is provided with a filter assembly with a flange joint on the sealing cover. Moisture and impurities in external air are adsorbed by activated carbon filter screens and desiccants filled in the hollow cylinder, and the activated carbon filter screens and the desiccants are connected with the flange joint through an external air outlet pipeline of a blowing equipment. The moisture and impurities are adsorbed, and a dustproof screen is used as an air vent to satisfy the drying and purification of air before the air enters the sealing cover. The dust accumulation and moisture erosion of the port are greatly reduced, and the heat dissipation problem of the tail end of the switch after the sealing cover is installed is solved. In combination with a rubber sealing ring at the tail end of the switch body and the sealing cover, the short board of the existing protection means in dustproof and moistureproof is solved.

The utility model relates to the technical field of hairdressing devices, in particular to a handle wiring structure and a hairdressing device.The handle wiring structure comprises a handle shell, a front side fixing frame and a rear side fixing frame, the handle shell is provided with an installation cavity, and the front side fixing frame and the rear side fixing frame are arranged in the installation cavity and assembled and fixed together; the front side fixing frame and / or the rear side fixing frame are / is provided with a notch for a cable to penetrate through. Compared with the prior art, the front side fixing frame and the rear side fixing frame are arranged, and the front side fixing frame and / or the rear side fixing frame are / is provided with the notches, so that when each assembly is assembled, a cable can penetrate through the wire passing holes to be arranged on the outer sides of the front side fixing frame and the rear side fixing frame, and the cable is prevented from being clamped by the assembly in the assembly process; and therefore, the assembly difficulty of each component is reduced. Meanwhile, the cables are arranged on the outer sides of the front side fixing frame and the rear side fixing frame through the notches, the cables can be prevented from invading the air duct, and the air volume and the air supply efficiency of the air duct are improved.

The invention discloses an ultrathin electronic glass slag box pressure control device and a using method, the ultrathin electronic glass slag box pressure control device comprises a nitrogen pipeline connected with a slag box, the output end of the nitrogen pipeline is sequentially connected with a U-shaped heating pipe and an output pipe, the output pipe is connected with a branch pipe in parallel, and the branch pipe extends to a lower cavity of the slag box through a cylindrical exhaust head; the nitrogen pipeline is provided with an electric butterfly valve, the input end of the heating pipe is provided with a flowmeter, the lower cavity of the slag box is provided with a pressure tapping pipe and a pressure gauge, and the output pipe and the branch pipe are wrapped by composite insulating layers. Through cooperative control of the electric butterfly valve, the flowmeter and the pressure gauge, the micro-positive pressure of the lower cavity of the slag box is maintained so as to block external invasion, nitrogen is heated and heat preservation is performed by means of tin bath waste heat, the process consistency is guaranteed, the quality of the lower surface of glass is remarkably improved, the requirements of TP grade judgment and the like are met, and the device is suitable for ultrathin electronic glass production scenes.

The invention provides a nano-composite anti-seepage coating for goaf sealing and a preparation method and application thereof. The impermeable coating comprises the following components in percentage by mass: 10 to 30 percent of nano silica sol subjected to surface organic modification, 15 to 35 percent of styrene-butadiene latex subjected to pH buffer stabilization, 0.5 to 10 percent of functional nano material subjected to surface activation treatment, 20 to 60 percent of superfine sand and the balance of short fiber, inorganic powder filler and auxiliaries. The method comprises raw material pretreatment; step-by-step gradient blending is performed; and functions are compounded. According to the application, the nano-composite anti-seepage coating is applied to surrounding rock reinforcement, crack plugging or anti-seepage sealing engineering of a coal mine goaf. The slurry has the advantages of being high in deep infiltration capacity, excellent in surface film forming and internal compatibility and stable in performance, an internal infiltration reinforcing layer and a surface sealing layer can be formed at the same time after construction, and an integrated double-layer anti-seepage network is formed.

The utility model provides a dust collector for cement production belongs to cement production technical field, including dust collection box and setting in its dust collection mechanism, dust collection mechanism includes the filter cylinder of rotation connection in the inner chamber of dust collection box, still be equipped with the cleaning mechanism for carrying out the cleaning of filter cylinder filter surface in the inner chamber of dust collection box, the cleaning mechanism includes the setting in the dust collection box Xiang board, the inner chamber both ends of Xiang board are rotationally connected with the rotary frame, is equipped with the brush roller between the inner chamber both ends of rotary frame. The utility model discloses through the cleaning mechanism, avoided the problem that the brush roller long -term exposure in dust -containing environment and led to the problem of the decline of cleaning ability, can carry out effective sealing protection under the non -working state, ensure the cleaning effect of every use is best, prolongs the service life of brush roller simultaneously, improved the reliability and operating efficiency of whole equipment.

This invention discloses a high-temperature resistant, high-density water-based drilling fluid for ultra-deep wells and its preparation method, belonging to the field of oil and gas drilling technology. The drilling fluid is composed of the following components in parts by weight: 100 parts water, 2-5 parts high-temperature resistant modified clay, 150-280 parts composite weighting agent, 8-15 parts high-temperature resistant polymer filtration loss reducer, 3-8 parts core-shell type high-temperature resistant flow modifier, 4-10 parts nano-composite plugging agent, and 2-5 parts high-temperature stabilizer. This invention effectively solves the technical problems of rheological runaway, increased filtration loss, and barite sedimentation in ultra-deep well high-density water-based drilling fluids under high-temperature conditions above 220℃ by utilizing the high-temperature expansion-disintegration mechanism of the core-shell type flow modifier, nano- to micron-level multi-stage plugging, and the close packing of spherical and irregular weighting materials. It exhibits temperature resistance up to 220℃ and a density of 2.80 g / cm³. 3 It has the advantages of low filtration loss under high temperature and high pressure and good sedimentation stability.

This utility model relates to the field of auxiliary equipment for construction engineering, and discloses a portable material classification, storage, and transportation box for construction engineering. The box includes a storage box with two fixed plates fixedly connected to its bottom inner wall. A motor is fixedly connected to the inner wall of one of the fixed plates, and a gear is fixedly connected to the drive end of the motor. Connecting rods are rotatably connected inside both fixed plates, and a gear is fixedly connected to the outer wall of one of the connecting rods. Transmission plates are fixedly connected to the outer walls of both connecting rods, and connecting rods are fixedly connected to the inner walls of both transmission plates. This utility model reduces the corrosion of the box material by rainwater and acidic or alkaline liquids such as construction site concrete slurry, prevents aluminum alloy oxidation and steel plate rusting, maintains structural strength, and the sealed structure reduces the leakage of volatile gases while preventing the intrusion of external corrosive gases, ensuring the chemical stability of the materials.

This utility model provides a vehicle battery connection PCBA wiring harness for use in PCBA wiring harnesses, including a male connector and a female connector. The male connector has elastic claws, and the female connector has a locking post. The locking post includes a tapered end and a column. The tapered end has a notch and a mounting groove, and the column has several equally spaced spiral grooves. The female connector contains ball bearings, and a tension spring is fixed between the locking post and the female connector. Two sets of elastic claws are symmetrically fixed to the bottom of the male connector. An unlocking block is slidably connected to the top of the male connector, and an elastic insulating pad is clamped between the unlocking block and the male connector. The unlocking block extends to both sides of the elastic claws and is fixed with an arc-shaped baffle. This utility model can effectively resist vehicle vibration and ensure connection stability through the locking structure of the locking post and claws. Unlocking can be achieved simply by lifting the unlocking block, making the operation simple and convenient, and facilitating later maintenance and wiring harness replacement.

The present application relates to a kind of dry screw compressor of gear speed-up, gas compression area is equipped with compression component on it, gear bearing, bearing lubrication area is equipped with shaft seal component on it, gear bearing lubrication area is also equipped with gear component;Gear component includes the speed-up gear set driven by low-speed motor, speed-up gear set realizes high speed transmission by synchronous gear set driven yin, male rotor.High speed transmission is realized by low-speed motor matching speed-up gear, and synchronous gear drives rotor synchronous operation, avoid mutual friction and collision between rotor, overall layout arrangement is reasonable, compact structure, transmission operation is stable, power transmission efficiency is high, cost is reduced.Using equipped shaft seal component combines embedded labyrinth seal structure, with air barrier, leakage collection and leakage backflow structure, sealing performance is stable and reliable, prevent lubricating oil from leaking into the interior of compression area, while avoiding compressed gas to leak into lubrication area, ensure dry screw compressor oil-free compression operating condition stable operation, improve the reliability of equipment operation.

The invention relates to the technical field of power motors, in particular to a base and end cover sealing structure and a motor, and the base and end cover sealing structure comprises a base, a shell, an outer end cover, an inner end cover and a sealing element; the inner end cover is detachably arranged at the first end of the base, the second end, opposite to the inner end cover, of the base is rotationally connected with a rotary connecting assembly, and the rotary connecting assembly is connected with the shell. One end of the outer end cover is connected with the shell, the other end of the outer end cover is opposite to the inner end cover, and the sealing piece is arranged between the inner end cover and the outer end cover and seals the opposite space between the inner end cover and the outer end cover; a connecting buckle is arranged at the end, facing the rotary connecting assembly, of the inner end cover, and an assembling clamping groove matched with the connecting buckle is formed in the base. The problems that traditional threaded connection is low in efficiency and prone to failure are solved, and efficient assembly and reliable sealing are achieved while the stability of the overall structure after connection with external accessories is guaranteed.

The application provides a preliminary crushing device for producing pig feed, and belongs to the technical field of pig feed processing equipment. The device comprises a fixed-knife cylinder assembly and a spiral lifting rotor assembly. The fixed-knife cylinder assembly comprises a mounting frame, a crushing cylinder, a crushing cavity, and multiple fixed blades arranged at intervals along the spiral lifting direction. The spiral lifting rotor assembly comprises a conical cylinder rotatably arranged at the center of the crushing cavity, a servo motor for driving the conical cylinder to rotate, a spiral conveying plate mounted on the outer surface of the conical cylinder, and multiple moving blades. The moving blades and the fixed blades are arranged alternately to form a shearing fit. A conical baffle, a central buffer spring, and an auxiliary buffer assembly are arranged at the bottom of the crushing cavity, so that the spiral lifting rotor assembly can float up and down as a whole. The application solves the problems of poor coordination, high idle energy consumption, easy clogging, and easy winding of high-moisture fiber materials around the crushing roller of the two-stage crushing mechanism of the existing device, and realizes single-stage self-adaptive crushing with simple structure and stable operation.