191 results about "Helical channel" patented technology

A fastening device system for connection at least a first and a second overlapping mats placed on the ground wherein the first mat is aligned over at least one connecting hole of the second mat, the fastening device system comprising, a housing having a first half and a second half wherein the first half and second half are attached together forming the housing. A pin having a foot disposed at the lower end thereof and a shaft having a helical shelf that engages the helical channel of the housing. The pin is configured so that when it rotates 90° in one direction to the housing the pin draws the foot closer to bottom of housing and provides at least one locking position of the foot and locking the foot in place.

A reactor for performing a synthesis process for producing a product from at least two reactants, the reactor comprising: a body having a longitudinal axis, an inflow side and an outflow side; an interior; at least two reactant conduits, each connected on the inflow side to at least one distributor channel; at least one product conduit connected on the outflow side to the at least one collection channel; at least one distribution section comprising at least two distributor channels and at least one diverter; at least one mixing section in which at least two distributor channels are connected via a mixing channel and at least two reactants can be combined; at least one reaction channel; at least one collection section comprising at least one collection channel; at least one inflow-side feed conduit for the entry of a heat transfer medium into the interior; the heat transfer medium can flow around at least a part of the length of the at least one reaction channel in the interior, and / or at least one heat exchange channel in which the heat transfer medium can flow is provided, wherein the at least one sub-section is arranged adjacent to the at least one reaction channel, and wherein the at least one heat exchange channel and the at least one reaction channel are separated from each other by a common channel wall, and wherein the at least one reaction channel is a multiple spiral comprising two or more spiral channels, each spiral channel of the multiple helixes is connected via at least one mixing section to at least one distributor channel of each of the at least two reactants, and wherein on the outflow side each spiral channel of the multiple helixes is connected to at least one collecting channel.

A system comprises a series of anchors, an anchor-storage device, and an anchor driver that is slidably coupled to the anchor-storage device. The anchor-storage device comprises a spring, and a housing, shaped to define: (i) a loading site, and (ii) a spiral channel that spirals inward to the loading site, the series of anchors arranged along the spiral channel, and the spring configured to urge the series of anchors along the spiral channel toward the loading site. The anchor driver comprises a rod extendable through the loading site in a manner that obstructs access of the series of anchors to the loading site from the spiral channel. Other embodiments are also described.

The utility model relates to a spiral belt type static mixer, which is used for fully mixing fluid for heat exchange, is connected with a heating medium device and comprises a first pipeline and a second pipeline sleeved outside the first pipeline, and both the first pipeline and the second pipeline are connected with the heating medium device. A fluid channel for fluid to flow is arranged between the first pipeline and the second pipeline; a plurality of mixing units are arranged in the fluid channel, a spiral channel consisting of a plurality of spiral bands is arranged in each mixing unit, fluid is mixed in the spiral channels, and the spiral channels in the adjacent mixing units are opposite in rotation direction. According to the utility model, by arranging the mixing units with opposite rotation directions, the fluid mixing effect is enhanced; no obvious dead zone exists in a fluid channel, and the problem that the heat exchange effect is poor due to the too thick boundary layer is solved; the second pipeline on the outer side and the first pipeline on the inner side can convey heat transfer media at the same time, the overall heat exchange effect of the pipeline can be remarkably enhanced, and the fluid temperature is more uniform.

Disclosed is a wing assembly for an aircraft. The wing assembly comprises a fixed wing, a wing tip device, a wiring harness and a harness guide. The wing tip device is moveably mounted at a joint at an end of the fixed wing. The wing tip device is moveable about the joint between: (i) a flight configuration for use during flight, and (ii) a ground configuration for use during ground-based operations, in which ground configuration the wing tip device is moved relative to the fixed wing such that the span of the wing is reduced. The wiring harness extends between the fixed wing and the wing tip device. The wiring harness comprises a plurality of conductors and is arranged to transmit electrical power and / or data to the wing tip device. The harness guide is located between the fixed wing and the wing tip device. The harness guide comprises a helical channel configured to receive the wiring harness and guide the wiring harness between the fixed wing and the wing tip device.

The invention discloses a combined type sand prevention oil-gas separator with a sand discharging structure, and belongs to the technical field of oil-gas separation. Comprising a shell, a spiral anchor is fixedly connected to the lower side in the shell, the spiral anchor and the shell are matched to form a spiral channel, an oil discharge channel is formed in the upper side of the shell, and oil discharge holes which are distributed at equal intervals in the circumferential direction and communicate the spiral channel with the oil discharge channel are formed in the shell. The outer shell is provided with an exhaust channel communicating with the upper side of the spiral channel, a bottom shell is arranged on the lower side of the outer shell, a fixing plate is fixedly connected into the bottom shell, the fixing plate is slidably connected with a connecting rod, and a first spring is fixedly connected between the connecting rod and the fixing plate; the connecting rod is fixedly connected with a sealing plug which slides on the lower side of the bottom shell in a sealing mode. According to the oil-gas separator, pressure is applied to the oil pipe, so that the bottom shell is unblocked by the sealing plug, sand in the bottom shell is discharged, and normal operation of the oil-gas separator is guaranteed.

The invention relates to a spiral plate heat exchanger in a surfactant production process, which comprises an outer spiral channel and an inner spiral channel nested in the outer spiral channel, and the spiral direction of the outer spiral channel is opposite to the spiral direction of the inner spiral channel; the inner spiral channel is formed by rolling two parallel inner spiral plates, the channel distance of the outer spiral channel is larger than that of the inner spiral channel, and the outer spiral channel is formed by rolling two parallel outer spiral plates. A partition plate is arranged between the outer spiral channel and the inner spiral channel, and a distance adjusting assembly is arranged on the partition plate and used for adjusting the channel distance of the outer spiral channel. The outer spiral channel and the inner spiral channel which are of a nested structure are adopted, the distance between the outer spiral channel and the inner spiral channel is larger than that between the outer spiral channel and the inner spiral channel, the outer spiral channel is suitable for high-viscosity or particle-containing surface active agent raw material liquid, the large distance reduces flowing resistance and avoids blocking, and the inner spiral channel is suitable for low-viscosity or media (such as cooling water) needing heat exchange enhancement. And the turbulence intensity can be enhanced by matching the smaller spacing with the reverse spiral.

This invention provides a phototube cooling mechanism and photoelectric system for tracking slabs in a heating furnace. The phototube cooling mechanism includes a sleeve, a guide tube, a glass plate, a pressure cap, and a cold flow tube. The sleeve has a first end and a second end opposite each other along its own axial direction. The guide tube is fitted inside the sleeve and is flush with the first end. A spiral channel exists between the outer wall of the guide tube and the inner wall of the sleeve. The spiral channel extends through the second end. The glass plate is located at the first end of the sleeve and the end of the guide tube, and is in contact with the space of the spiral channel. The pressure cap is connected to the first end of the sleeve and presses the glass plate tightly against the sleeve and the guide tube. The cold flow tube is disposed on the outer wall of the sleeve near the first end and communicates with the spiral channel. The spiral flow of the cold flow increases the heat exchange time, thereby removing more heat. Therefore, the temperature of the cold flow can be set relatively high, thereby reducing the heat removed from the furnace by the cold flow, thus improving the utilization rate of the furnace and reducing fuel consumption.

This invention discloses an adjustable dual-band acoustic metasurface absorber with nested double-helix tracks, comprising an outer cavity, an inner cavity, and a central column arranged coaxially. A sealing cover is provided on the inner cavity, with a through hole and a central hole for avoiding the center. The inner wall of the outer cavity and the outer wall of the inner cavity form an outer large-radius spiral channel, within which outer helical blades are arranged spirally extending along the central axis of the central column. The inner wall of the inner cavity and the outer circumferential surface of the central column form an inner small-radius spiral channel, within which inner helical blades are fixedly connected to the central column. This invention can effectively absorb noise over a wide frequency band (especially in the low-frequency range), exhibits good environmental adaptability and durability, can intelligently adjust sound absorption characteristics, and simultaneously considers environmental friendliness and aesthetics.

The invention relates to the technical field of traditional Chinese medicine nursing, in particular to a medicine hot compress device for traditional Chinese medicine nursing and a using method thereof.The medicine hot compress device for traditional Chinese medicine nursing comprises an inner core layer used for providing shaping capacity so that the hot compress device can be wound around the joint position of a patient; the circulating layer is arranged on the surface of the inner core layer and comprises an inner spiral channel for heat source circulation and an outer spiral channel for heat source recovery, and the inner spiral channel is communicated with the outer spiral channel, so that the heat source penetrates through the inner spiral channel and flows back through the outer spiral channel. The shaping shaft serves as the center, random deformation is conducted within a certain limit, meanwhile, the inner spiral channel and the outer spiral channel are each of a spiral structure, so that a heat source still keeps circulating when the inner spiral channel and the outer spiral channel are bent, namely, the shape change of the shaping shaft does not affect circulating flowing of the heat source, and the heat source is not prone to deformation. Therefore, the purpose of adaptive change according to the hot compress position is achieved.

The present application discloses a low water consumption showerhead that can provide a user with a higher water pressure experience without the need to add water supply. A first example showerhead may include nozzles having coaxial inner and outer chambers, each nozzle may provide one or more different types of media to a user. The inner chamber of the nozzle may be adjusted relative to the outer chamber, which may allow a user to manipulate the relative flow rates from the two chambers. A second example showerhead may include a helical channel along which one or more types of media may flow. The outlet may be positioned along the helical channel such that a portion of the medium within the helical channel may exit the showerhead and be directed to a user. The width or area of the spiral channel may be tapered so as to provide a substantially uniform pressure at each outlet.

Combined cooling of electric machines are disclosed, for example, motors or generators, directly and by means of a water jacket. Particularly, it is provided an electric machine (100), comprising a housing (110), a water jacket (120) integrated in the housing (110) and a stator (130) accommodated in the housing (110) and comprising stator end windings (133) at a first axial end and a second axial end of the stator (130) and a plurality of channels (135) extending entirely through the stator (130) between the first axial end and the second axial end of the stator (130), wherein the plurality of channels (135) is configured and arranged for guiding a coolant towards the stator end windings (133). The water jacket (120) comprises an inlet (122) and an outlet (124) and a helical channel (128) connecting the inlet (122) with the outlet (124) and having a diameter larger than the diameter of the inlet (122) and the diameter of the outlet (124).

The application relates to the technical field of optical fiber communication cables, in particular to an ultra-low-loss hollow-core optical fiber composite cable based on an anti-resonance structure, which comprises a cylindrical optical fiber composite cable body, a reinforcing rod serving as a support member is arranged at the center of the optical fiber composite cable body, a plurality of spiral partitions fixedly connected with the reinforcing rod are uniformly distributed in the circumferential direction of the reinforcing rod, adjacent spiral partitions form independent spiral cavities, the spiral cavities are variable-pitch spiral channels, hollow-core optical fibers and solid-core optical fibers are arranged in the spiral cavities at intervals and are wound around the outer periphery of the reinforcing rod along the spiral tracks of the spiral partitions, and a sealing protection structure is mounted on the periphery of the spiral cavities, so that the problems in the prior art that the stress resistance is weak, the optical fiber is easily broken or the transmission loss is increased when the optical fiber is laid, stretched and bent, and the crosstalk between the optical fibers is serious, thereby affecting the transmission stability are effectively solved.

The application discloses a micro-fluidic chip for sorting sub-micron scale cells, which is composed of three components of an upper cover plate, a cell sorting micro-channel and a lower bottom plate by layer bonding. The upper cover plate is provided with an outside inlet, an inside inlet, an outside outlet and an inside outlet. The cell sorting micro-channel is composed of three regions of an inlet structure adjusting region, a spiral channel region and an outlet region. The lower bottom plate is provided with a convex wedge-shaped structure, and three kinds of inlet structures of an outside-narrow-inside-wide shape, an outside-inside-equivalent shape and an outside-wide-inside-narrow shape can be obtained by adjusting the position of the wedge-shaped structure. The sub-micron scale cells are sorted by the cooperation of the cell sorting micro-channel and the wedge-shaped structure. The spiral micro-channel is introduced, the cell transverse migration starting point is controlled by adjusting the spiral channel inlet structure and cooperating with suitable flow conditions, and the high-precision sorting of the sub-micron scale cells is finally completed. The cell sorting diversity and adaptability are improved by flexibly adjusting according to specific sorting requirements.

The utility model discloses a plastic particle cooling and deodorizing device, which belongs to the technical field of plastic particle processing devices and comprises a base. The buffering assembly is connected to the base; the cooling and deodorizing mechanism comprises a reaction frame connected to the top of the buffer assembly, a rotating disc is fixedly connected to the reaction frame, a spiral channel is defined by the rotating disc and the reaction frame, the top of the reaction frame communicates with an air inlet pipe, and the side portion of the reaction frame communicates with a plurality of air outlet holes; one end, far away from the reaction frame, of each air outlet hole points to the spiral channel. According to the utility model, an external compressed nitrogen source fills compressed nitrogen into the reaction frame through the gas inlet pipe, the electrodes are electrified to generate a high-voltage electric field, ionize nitrogen, generate high-energy electrons and free radicals, and react and absorb volatile organic compounds released by plastic particles to finish deodorization; and meanwhile, redundant nitrogen is discharged from the air outlet holes, and heat dissipation is conducted on the plastic particles in the spiral channel.

This invention relates to a spiral noise-canceling earphone, comprising: an earphone head including a front cavity and a rear cavity opposite to the front cavity, wherein a sound-generating unit is disposed within the front and rear cavities; one end of the rear cavity that connects to the front cavity is designated as the front end, and the other end as the rear end; the inner wall of the rear cavity extends from the front end to the rear end, and the distance to the center of the rear cavity decreases as it approaches the rear end; a noise-canceling structure is provided on the inner wall of the rear cavity, the noise-canceling structure including a first spiral ridge, a second spiral ridge, and a spacer groove; the first spiral ridge and the second spiral ridge extend clockwise or counterclockwise from the front end of the rear cavity along its inner wall to the rear end; through the cooperation of the first spiral ridge, the second spiral ridge, and the spacer groove, combined with the conical cavity and the gradually changing width of the spiral ridge, a complex sound wave propagation path is formed; when noise passes through these spiral channels, the sound waves are subjected to multiple reflections and interferences, resulting in gradual energy attenuation, thereby achieving the effect of eliminating noise and improving sound quality.

The invention discloses an intelligent closestool waterway silver ion cleaning device, and relates to the technical field of closestool waterways. The intelligent closestool waterway silver ion cleaning device comprises a spiral channel assembly, a silver ion cavity, a silver ion ceramic ball, an anti-abrasion positioning assembly and a connecting valve, the spiral channel assembly is of a double-layer hollow pipe body structure, and the silver ion cavity is connected and communicated with the end of the spiral channel assembly; the silver ion ceramic ball is arranged on the inner side of the silver ion chamber, and the ratio of the diameter of the silver ion chamber to the diameter of the silver ion ceramic ball is 1: (0.7-0.8). According to the intelligent closestool waterway silver ion cleaning device, through the matched design of the spiral channel assembly, the silver ion chamber and the silver ion ceramic ball, a spiral flow guide channel is formed in the waterway, the tail end of the waterway is connected with a friction cavity containing the silver ion ceramic ball, centrifugal force is generated when water flow passes through the spiral channel, and the ceramic ball is pushed to rotate at a high speed; the larger the flow rate is, the higher the friction strength is, and the silver ion release amount is adjusted in a self-adaptive mode.

The utility model discloses a heat exchanger pipe expander which comprises a machine base, a guide mechanism, a rod storage mechanism, a flexible rod and an expansion rod driving mechanism. The guide mechanism is arranged on the machine base, and a guide hole is formed in the guide mechanism; the rod storage mechanism is arranged on the machine base, the rod storage mechanism is provided with a spiral channel, and a passing opening is formed in one end of the spiral channel; a flexible rod is arranged in the guide hole in a penetrating mode, the flexible rod can move in the length direction and retract into or stretch out of the spiral channel through the passing opening, and a pipe expanding head is arranged at the end, away from the rod storage mechanism, of the flexible rod. The expansion rod driving mechanism is arranged on the machine base and used for driving the flexible rod to move in the length direction. And the spiral channel is used for spirally winding the flexible rod, so that the occupied area of equipment can be reduced, and the field utilization efficiency is improved.

The present invention relates to a packaging production line for electronic components to be assembled on site, comprising a spiral conveyor; a waste discharge device is provided at a waste discharge station on a spiral channel of the spiral conveyor; the waste discharge station is located before a capping station; the waste discharge device comprises a waste discharge downward pressure drive shaft portion provided above the spiral channel, and a waste discharge downward opening and closing door is provided at the bottom of the spiral channel of the waste discharge station; the present invention has a reasonable design, a compact structure and is easy to use.

The invention provides a pepper quality screening method and device based on a YOLOv8 algorithm, and relates to the technical field of machine vision sorting. According to the invention, the spiral channel vibrating screen is adopted to orderly convey hot peppers to the conveyor belt, images are collected through the camera, and a YOLOv8 model is utilized to carry out target detection and classification. According to the recognition result, the bad peppers and the good peppers are accurately separated through the air injection sorting unit, and automatic, high-precision and high-efficiency pepper screening is achieved.

The application discloses a feed surface floating powder removing device and relates to the technical field of feed production.The device comprises a straight cylinder, a blow pipe, a first conical cylinder and a driving device.The inner side wall of the straight cylinder is provided with a flow guide spiral channel, and the cross section of the flow guide spiral channel is rectangular.The blow pipe is arranged on the upper end of the straight cylinder and is in communication with the flow guide spiral channel.The upper side wall of the blow pipe is provided with a feeding port.The first conical cylinder is arranged on the lower side of the straight cylinder.The upper end of the cavity of the first conical cylinder is in communication with the flow guide spiral channel and the cavity of the straight cylinder.The upper end of the first conical cylinder is larger than the lower end.The inner wall of the first conical cylinder is provided with a first soft hair brush layer.The lower end of the first conical cylinder is provided with a first discharging port.The first conical cylinder can rotate around its axis.The axis of the straight cylinder is coincident with the axis of the first conical cylinder.The driving device is arranged on the outer side of the first conical cylinder.The driving device is in rotational driving connection with the first conical cylinder.The device provided by the application has high powder removing efficiency and can avoid damage to feed particles.

The utility model belongs to the field of extruder equipment, and particularly relates to a sizing material extruder which comprises a rack, the hopper is arranged on the rack, and the hopper is provided with a feeding port and a discharging port; the discharging pipe is arranged on the machine frame, a discharging channel is arranged on the discharging pipe in a penetrating mode, a feeding port and a discharging port are formed in the discharging pipe, and the feeding port is communicated with the discharging channel and the discharging port at the same time; the spiral rod is arranged in the discharging channel of the discharging pipe, a spiral channel is formed between the spiral rod and the inner wall of the discharging channel, and fluid rubber in the hopper can flow through the spiral channel and finally flow out of the discharging port; the stirring part is arranged on the rack, one end of the stirring part is hinged to the rack, the other end of the stirring part extends into the hopper from the feeding opening, and when one end of the stirring part swings relative to the rack, the other end of the stirring part swings in the hopper. According to the utility model, the fluid sizing material in the hopper can be stirred, the uniformity of the fluid sizing material in the hopper can be effectively guaranteed, and the fluid sizing material can be prevented from being solidified in the hopper.

The present invention belongs to the technical field of chemical reaction equipment, and specifically relates to a plug flow reaction device for high-pressure reaction processes and a construction method thereof. The plug flow reaction device comprises: at least one reaction unit, the reaction unit having a reaction unit inlet and a reaction unit outlet; the reaction unit having a spiral channel in a horizontal direction, the reaction material enters the spiral channel through the reaction unit inlet, and after a plug flow reaction is carried out in the spiral channel, is discharged through the reaction unit outlet. The plug flow reaction device and the construction method thereof described in the present application have the advantages of safety, high efficiency and low construction cost.

The invention discloses a processing method of lutein and lutein ester soft sweets with an optimized oil-ester ratio, which uses a material mixing device comprising a main body unit, a material mixing assembly and a cooling unit, the main body unit comprises a stirring tank; the mixing unit comprises a vertical shaft, and a plurality of stirring shafts are fixedly connected to the vertical shaft; the cooling unit comprises a heat conduction rod, a heat dissipation cavity, a vertical channel and a first spiral channel are formed in the vertical shaft, a second spiral channel is formed in the stirring shaft, a second one-way valve is arranged at the joint of the first spiral channel and the heat dissipation cavity, and a suction assembly is arranged in the heat dissipation cavity. A movable assembly is arranged in the space, above the suction assembly, in the heat dissipation cavity, and a heat dissipation assembly is arranged on the heat conduction rod. Heat generated during stirring of the stirring shaft is absorbed through the cooling liquid, and the heat absorbed by the cooling liquid is conducted outwards through the heat conduction rods, so that the influence of local high temperature generated by the stirring rods on lutein ester is avoided.

The invention discloses an evaporator and an ice making device, the evaporator comprises a barrel and a spiral block, the barrel is provided with a refrigeration cavity, a refrigerant inlet and a refrigerant outlet, the refrigerant inlet and the refrigerant outlet are both communicated with the refrigeration cavity, and the refrigerant inlet and the refrigerant outlet are arranged at an interval; the spiral block is located in the refrigeration cavity and connected to the barrel to form a spiral channel, the spiral block spirally extends along the central axis of the barrel, the screw pitch of the spiral channel is gradually decreased in the direction from the refrigerant inlet to the refrigerant outlet, and the spiral channel is used for restraining conveying of the cooling medium along a preset path. Therefore, during use, the screw pitch of the spiral channel is gradually reduced, so that the liquid level height of the cooling medium is indirectly increased, the contact area between the cooling medium and an object to be subjected to cold transfer is increased, and the refrigeration efficiency is improved.

In the present invention, while a rotary shaft is stationary or rotating at a low speed, a lip part is brought into pressure contact with a contact surface provided on a housing to seal between the rotary shaft on the leading end side of a device and the housing, and the lip part is separated from the contact surface to release the sealing when the rotary shaft rotates at a prescribed rotation speed exceeding the low-speed rotation or higher. The present invention comprises a deformation reduction member that limits deformation of the lip part while the rotary shaft is rotating. The housing is provided with an outer-diameter-side flow path through which air sucked into the device from the outside flows in the device, and the outer-diameter-side flow path is provided with an outer-diameter-side spiral passage. An air discharge path for discharging air from the leading end side of the device is in communication with the outer-diameter-side flow path, and a sealing device is disposed in the air discharge path. In addition to the centrifugal force of the rotary shaft in rotation, the air flowing through the outer-diameter-side flow path acts at the time when the lip part of the sealing device is separated from the contact surface.

The invention discloses a chemical plastic pipe bending strength detection device based on an intelligent sensor, and relates to the technical field of chemical safety, the chemical plastic pipe bending strength detection device comprises a rack and a control box, the inner side of the rack is provided with a spiral feeding mechanism, and one end of the spiral feeding mechanism is fixedly connected with a bending detection mechanism; a curvature adjusting mechanism is arranged at one end of the bending detection mechanism, connecting pipes are slidably connected to the inner sides of the two ends of the rack, a spiral channel formed by a plurality of bending pipes is formed in the inner side of the bending detection mechanism, when a chemical pipeline penetrates through the spiral channel, the chemical pipeline is subjected to stretching and compression cyclic stress continuously in a full-circumference mode, stress distribution is more uniform, and the bending detection efficiency is improved. The spiral stress state, such as a coil pipe, a coiled pipe, a winding pipe and the like, of the chemical pipeline in actual service is approached; besides bending stress, circumferential torsion stress and radial shearing stress are generated due to constraint of the spiral channel, and the spiral channel is more suitable for the composite stress characteristics of the chemical pipeline under complex working conditions, such as micro rotation and spiral bending caused by medium flow.

A method for preparing a photocurable high-temperature superconducting spiral includes: S1, constructing an additive manufacturing system; S2, building model slice data; S3, preparing immiscible YBCO ceramic precursor slurry and sacrificial slurry; S4, connecting the YBCO ceramic precursor slurry and sacrificial slurry to the additive manufacturing system, wherein the YBCO ceramic precursor slurry encapsulates the sacrificial slurry during extrusion; S5, importing the model slice data into the additive manufacturing system and controlling the system to move according to a preset program to prepare the target spiral; S6, curing the spiral to obtain a three-dimensional spiral green body with a complete 3D sacrificial material network embedded inside; S7, degrading the sacrificial material to leave cavity channels; S8, debinding the three-dimensional spiral by performing a heat treatment regime to 500°C at a preset heating rate; S9, sintering the debinded three-dimensional spiral to finally obtain a three-dimensional interconnected spiral channel network.

The utility model provides an evaporator for an extrusion type ice maker, which comprises a base, an inner pipe which is connected with the base in a matching manner, is hollow inside and is provided with a water inlet, an outer pipe which is sleeved outside the inner pipe and is provided with a refrigerant inlet and a refrigerant outlet, a screw rod positioned in the inner pipe, and a spiral guide piece positioned between the inner pipe and the outer pipe, wherein the spiral guide piece can be integrated or formed by splicing a plurality of single spiral sheets. The evaporator has the advantages that refrigerants can orderly flow along the spiral channel in a closed cavity formed by the spiral guide piece, the upper end cover, the lower end cover, the inner pipe and the outer pipe, so that heat exchange surfaces of the inner pipe wall of the evaporator are evenly distributed, the ice making process is rapid and smooth, and accumulated ice blocks are prevented from blocking an ice outlet channel.

The application discloses a quartz piece vacuum adsorption fixing device and relates to the technical field of quartz piece processing. The quartz piece vacuum adsorption fixing device comprises an adsorption table, the adsorption table comprises a pedestal, a funnel cavity formed in the interior of the pedestal, a table plate fixedly connected to the top end of the pedestal, a mosquito coil-shaped spiral channel formed in the interior of the table plate, a catheter fixedly connected to the side surface of the table plate and in communication with the outer end port of the spiral channel, rubber through strips inserted into the spiral channel and the catheter, and a plurality of air channels uniformly formed in the interior of the table plate along the spiral path of the spiral channel, and the middle part of each air channel is in communication with the spiral channel. By selectively blocking or opening some air channels through the movement of the rubber through strips, the size range of the quartz piece to be fixed can be matched with the unblocked air channels, the type changing time of the adsorption table is greatly shortened, the equipment investment cost is reduced, and the production efficiency is improved.