28 results about "Double teeth" patented technology

The utility model relates to the technical field of municipal road engineering culvert construction, and discloses an assembly type box culvert with a double-tooth cover plate, which comprises an assembly type box culvert body and a cast-in-place bottom plate, the box culvert body is composed of a top plate and two wing side plates, the lower part of the top plate is provided with a trapezoidal plate tooth structure which is used for being connected with side walls and is in bilateral symmetry, and the two wing side plates are arranged on the lower part of the trapezoidal plate tooth structure. Four reserved fixed hoisting bolts used for hoisting construction are arranged on the upper portion of the top plate, polygonal supporting feet which have the vertical supporting effect and are connected with a bottom cast-in-place slab are arranged at the bottoms of the side plates, prefabricated extending steel bars on the inner sides of the supporting feet are connected with cast-in-place concrete, cast-in-place is conducted on the concrete bottom plate before hoisting construction is completed, and longitudinal connection stability is guaranteed. The fabricated box culvert cover plate is provided with the preformed holes and the plate tooth structures, it is guaranteed that the cover plate is evenly stressed in the hoisting process, the cover plate is firmly connected with the two wing side plates, transverse displacement of the side plates is limited, and the box culvert is prevented from being damaged or losing the mechanical property in the construction and service process.

The set of inventions relates to medical devices, in particular to surgical retractors and wound retractors for displacing and securing anatomy of a surgical incision in a given position during surgery to provide access to a surgical region of a patient's body. A removable clip for a surgical retractor, made as an L-shaped curved member, includes a base provided with a device for fixation in a surgical retractor and a microsurgical instrument recess, and a pair of teeth for holding an anatomical structure. The toothing is configured as a profiled plate with a working area widening to ensure contact with the anatomical structure, the widening being formed by a raised pad located at least on the inner and / or outer end edge side of the lower end of the plane of the toothing plate. The included angle between each tooth part and the plane of the base is smaller than 90 degrees, and therefore gaps used for passing of microsurgical instruments are formed between the tooth parts. The surgical retractor comprises a frame with a rack carrying a fixed arm and a movable arm, the fixed arm and the movable arm being hingedly connected to a retainer for the detachable clip, where the retainer is configured to receive at least one of the aforementioned detachable clips. A removable clip assembly for a surgical retractor includes at least one central dual tooth removable clip; the at least one peripheral double-tooth detachable clamp is constructed to be capable of accommodating the central double-tooth clamp between the tooth parts of the central double-tooth clamp; and at least one central single-tooth detachable clamp. The use of the invention provides an increased working space and a higher degree of freedom of surgical instrument operation, enabling access to the lateral region of the operated structure during surgery without extending the skin incision.

The utility model provides a double-tooth zipper tooth arranging machine. Two fixing blocks are arranged on a shell; the zipper teeth are conveyed to the position between the two fixing blocks through the conveying assembly, the conveying assembly is provided with a conveying groove channel, and the zipper teeth are conveyed through the conveying groove channel; the driving assembly is arranged on the shell; the tooth clamping assembly is driven by the driving assembly, and zipper teeth are fixed to the material belt through the tooth clamping assembly. The pushing assembly controls one zipper tooth to fall into the conveying channel every time and pushes the zipper tooth to the tooth clamping assembly. The material conveying assembly is matched with the material pushing assembly, one pulling tooth falls off each time, the zipper teeth are clamped and fixed to the material belt through the tooth clamping assembly, and it is avoided that multiple zipper teeth fall off at the same time, installation of the zipper teeth on the material belt is affected, and the tooth clamping assembly and the material pushing assembly move reversely; therefore, it is guaranteed that the pushing assembly and the tooth clamping assembly alternately move, zipper teeth can be conveniently fixed to a material belt, and the efficiency of the tooth arranging machine is improved.

1. Name of the designed product: zipper slider (double teeth). 2. Use of the designed product: accessory for compression bag zipper. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view.

The invention relates to the technical field of manure fermentation, in particular to a heating and oxygenation device suitable for aerobic fermentation of solid manure, which comprises a fermentation frame, concave stacking frames are symmetrically hinged to two sides of the center in the fermentation frame, the bottoms of the stacking frames are of mesh structures, and guide frames are obliquely arranged on two sides of a front end frame body of the fermentation frame in a penetrating manner. Corrugated grooves are formed in the front inner wall and the rear inner wall of the fermentation frame, a double-tooth sliding plate with the side section of an inverted convex structure is arranged at the top end in the fermentation frame, and an auxiliary fermentation mechanism is arranged at the bottom end of the double-tooth sliding plate; the deep fermentation process of the feces is effectively accelerated through a cooperative treatment mode of dynamic dehydration, turning and crushing and intermittent oxygen supply, so that the problems of insufficient oxygen supply and insufficient fermentation in the traditional fermentation process are solved, and the aerobic fermentation efficiency of the feces is remarkably improved.

1. The name of this design product: double-tooth comb. 2. Purpose of the product of this design: a tool for combing hair. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

1. Name of the designed product: Comb (double teeth). 2. Use of the designed product: The designed product is used for combing hair. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The utility model belongs to the technical field of articular ligament repair, and particularly relates to a positioning guide device for acromioclavicular joint reduction ligament repair, which comprises a double-tooth clamp device and a guide sleeve, the double-tooth clamp device comprises a first clamp and a second clamp, the tails of the first clamp and the second clamp are provided with latches, and the guide sleeve is sleeved on the first clamp and the second clamp. The first clamp head is provided with upper teeth, the upper teeth are fixedly connected with a double-rail arc-shaped sliding rod, the second clamp head is provided with lower teeth, the lower teeth are fixedly connected with a concave arc column, the joint of the concave arc column and the lower teeth is provided with positioning teeth, the far end of the concave arc column is provided with a positioning bent column, and the guide sleeve comprises an outer guide cylinder. The acromioclavicular joint restoration device is convenient for the proceeding of an acromioclavicular joint restoration operation, not only can the acromioclavicular joint be pressurized and restored through the double-tooth clamp device, but also the acromioclavicular joint restoration device can be installed in a guiding manner, and the damage caused by too deep drilling of a kirschner wire or a hollow drill bit to subclavian nerve blood vessels at the lower edge of a coracoid process is effectively avoided.

A slide fastener and a garment are disclosed, including a main member unit (100) having a main member tape (110), and a main member double teeth (120) provided at intervals on the main member tape (110) and formed with a plurality of double tooth cavities (130) and a main slide portion (140) constituting a slide rail, and a sub-member unit (200) having a sub-member tape (210) and sub-member double teeth (220) provided at intervals on the sub-member tape (210). The sub-member double teeth (220) include a tooth portion (223), a connecting portion (222), and a sub-member base (221). The sub-member base (221) is connected to the sub-member tape (210). The tooth portion (223) is fitted into the double tooth cavity (130), and the connecting portion (222) is fitted into the main slide portion (140). Thereby, the tooth portion (223) slides along the double tooth cavities (130) arranged in sequence, and the sub-member base (221) covers the side surface of the arm portion (122b) on the side of the main slide portion (140). The left side surface of the sub-member base (221) is connected to slide on the right side surface of the main member double teeth (120). By being connected to the sub-member base (221) on the right side surface of the main member double teeth (120), the sub-member base (221) rubs against the main member double teeth (120) instead of the edge of the fabric, greatly reducing the total frictional force, effectively improving the overall smoothness, and reducing the frictional noise.

The invention discloses an FRP-wrapped cement-based composite grouting sleeve of a sandwich structure and an application method of the FRP-wrapped cement-based composite grouting sleeve. The FRP-wrapped cement-based composite grouting sleeve is composed of a tooth-shaped FRP sleeve, a double-tooth-surface UHPC pipe, a cement-based composite grouting material and bonding resin. The tooth-shaped FRP sleeve is arranged on the outermost side of the grouting sleeve, and the double-tooth-face UHPC pipe is located in the middle of the grouting sleeve. And the tooth-shaped FRP sleeve is bonded with the double-tooth-surface UHPC pipe through the bonding resin. The reinforcing steel bar is inserted into the double-tooth-surface UHPC pipe and is connected with the double-tooth-surface UHPC pipe through the cement-based composite material grouting material. According to the FRP-wrapped cement-based composite grouting sleeve of the sandwich structure and the application method of the FRP-wrapped cement-based composite grouting sleeve, through the tooth-shaped structures arranged outside the FRP sleeve and the UHPC pipe, enough binding power can be provided, and the steel bars are prevented from being pulled out of a cement-based composite grouting material. By utilizing the characteristics of multipoint cracking and high ductility of the cement-based composite material, the local high stress is reduced, the local crushing damage of the cement matrix caused by overlarge bonding stress is avoided, the application range is wide, and the standardization is high.

The utility model relates to the technical field of threaded pipes, in particular to a heat exchange threaded pipe which comprises a pipe body, a plurality of annularly-distributed spiral protruding rib structures are formed on the inner wall of the pipe body, each protruding rib structure is composed of two tooth-shaped structures, and the two tooth-shaped structures are in transition connection through an arc-shaped face. A plurality of annularly-distributed spiral inwards-concave structures are formed in the corresponding positions of the outer wall of the pipe body. According to the threaded pipe, the convex rib structure is arranged in the threaded pipe and composed of the two tooth-shaped structures, the inner concave structure is formed in the corresponding position of the outer wall of the pipe body, the inner surface area and the outer surface area of the pipe are increased at the same time, and the heat exchange area of the threaded pipe is remarkably increased no matter whether fluid flows through the inner wall of the pipe or the outer wall of the pipe; the turbulent motion is further enhanced, and the fluid is uniformly mixed in the pipe, so that the heat exchange efficiency is improved.

The utility model relates to the technical field of double-tooth V-shaped belts, and provides a stretch-proof double-tooth V-shaped belt which comprises two abrasion-resistant layers and a supporting layer, the supporting layer is located between the two abrasion-resistant layers, the sections of the two abrasion-resistant layers are of a tooth-shaped structure, the supporting layer comprises a stretch-proof layer and a plurality of stretch-proof cores, the stretch-proof layer is located in the middle of the supporting layer, and the stretch-proof cores are located in the middle of the supporting layer. The cross section of each tensile core is of a wavy structure, the multiple tensile cores are linearly arranged along the supporting layer to form two tensile core sets, and the two tensile core sets are located on the two sides of the tensile layer respectively. By means of the technical scheme, the problems that in the prior art, due to the long-term twisting and stretching effect, the V-shaped belt is stretched and lengthened, the V-shaped belt is loosened, and the power transmission effect of the V-shaped belt is reduced are solved.

This invention relates to the field of tooth surface grinding technology for aviation damper shafts and limit gear shafts, specifically to a flexible internal and external gear double tooth surface grinding device and processing method. The device includes a manual reversing mechanism, a flexible double-sided force-bearing mechanism, and a motor-driven reciprocating mechanism. This invention has high processing efficiency, good precision control, and stable and reliable quality, and can meet the high-precision processing requirements of non-deformable joint fork lugs with rotating structures in mass production.

The invention provides a combined structure for synchronously unloading trapped oil of a single tooth and double teeth of a gear pump, two stepped unloading grooves are formed in the inner side surfaces of two end plates of the combined structure by taking a vertical surface as a symmetric surface, and the stepped unloading grooves are formed by recessing the inner side surfaces of the end plates along the X-axis direction; each step unloading groove is in a mirror symmetry shape with the flow direction face as the symmetry face. Each step unloading groove comprises a rectangular deep groove and a rectangular shallow groove which are communicated with each other, and the depth of the rectangular shallow groove is smaller than that of the rectangular deep groove; in the same step unloading groove, the rectangular shallow groove is located in the side, facing the vertical face, of the rectangular deep groove. According to the gear pump, the pressure amplitude and the pressure peak value of a single-tooth oil trapping area and a double-tooth oil trapping area can be fully reduced, the maximum oil trapping pressure of the single tooth is reduced to 35.2%, and the maximum oil trapping pressure of the double teeth is reduced to 45.2%, so that the oil trapping phenomenon of the gear pump is comprehensively and fully relieved, the input power of the gear pump can be reduced by about 5.4%, and the output flow is increased.

1. Name of the product in this design: Zipper (double teeth). 2. Application of this design: for use in zippers on clothing, bags, etc. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D rendering 1.

The present invention discloses a double-toothed fixed blade of a reciprocating razor, wherein the A-type fixed blade teeth and the B-type fixed blade teeth are staggered and arranged, which is conducive to combing long hair and improving the efficiency of long hair entering the hair feed groove, thereby improving the cutting efficiency of relatively long body hair; the present invention also discloses a double-toothed fixed blade structure of a reciprocating razor, wherein an inwardly concave escape groove is provided on a fixed frame, corresponding to the tooth bodies of a plurality of A-type fixed blade teeth and the tooth bodies and retaining edges of the B-type fixed blade teeth, the corresponding tooth bodies are supported from below by the retaining edges, a movable cavity for the movable blade to move within is provided between the fixed blade and the fixed frame, a notch is formed between two adjacent B-type fixed blade teeth at the bottom of the A-type fixed blade teeth, spanning from one hair feed groove to the other hair feed groove, which can effectively prevent hair from being pressed crooked or pressed down and unable to enter the hair feed groove; the present invention also discloses a method for manufacturing the double-toothed fixed blade structure of a reciprocating razor, which is simple in process, and the manufactured fixed blade structure is conducive to shaving relatively long body hair.

The invention provides a self-rotation type double-tooth variable cross-section scroll plate exhaust hole structure and an optimization method thereof. The self-rotation type scroll plate comprises a driving scroll plate and a driven scroll plate, the two scroll plates are arranged oppositely, the distance between the circle centers of the two scroll plates is L, a plurality of eccentric small shafts are arranged between the two scroll plates, and the driving scroll plate drives the driven scroll plate to rotate through the eccentric small shafts after rotating. And determining the maximum allowable opening area of the exhaust hole according to the autorotation process, and taking the area as the shape constraint condition of the exhaust hole. Performing parametric modeling on the exhaust hole, establishing a mathematical model between exhaust hole parameters and pressure pulsation and flow pulsation intensity coefficients, performing collaborative optimization on the exhaust hole parameters through a multi-target optimization method by taking the pressure pulsation and flow pulsation intensity coefficients as targets, and obtaining a Pareto frontier solution set; and selecting an optimization result in the Pareto frontier solution set according to an actual demand.

The invention provides a forming system for treating a double-tooth adjacent surface hole and an application method thereof.The forming system comprises a forming piece assembly and a forming clamp assembly used in cooperation with the forming piece assembly, a specific forming system of a double-forming-piece synchronous pressurizing structure is formed, and one-time precise repairing of the double-tooth adjacent surface hole is achieved; the technical problem that an existing adjacent hole repairing technology is low in diagnosis and treatment efficiency is solved.

The invention provides a preparation method of a bidentate chelating fluorine removal agent, which comprises the following steps: step 1, dropwise adding an inorganic alkali solution into an AlCl3 solution or an FeCl3 solution, and carrying out pre-hydrolysis reaction to obtain a pre-hydrolyzed aluminum solution or iron solution; 2, mixing silanetriol with the pre-hydrolyzed aluminum solution or iron solution obtained in the step 1 to obtain a mixed stock solution, 3, dropwise adding an inorganic alkali solution into the mixed stock solution obtained in the step 2, and carrying out an alkalization reaction to obtain an alkalized solution; and 4, aging the alkalized solution obtained in the step 3 to obtain the bidentate chelating fluorine removal agent. The prepared double-tooth chelating fluorine removal agent can effectively solve the problems that in the prior art, a fluorine removal agent is poor in selective removal capacity for fluoride in fluorine-containing sewage, poor in floc settling performance, large in dosage, residual in fluorine removal agent and the like.

The invention specifically discloses a gear transient thermal grid temperature detection method and system considering single-tooth and double-tooth alternate meshing, and the method comprises the following steps: collecting the basic parameters of the thermal resistance of a gear, the meshing time ratio of single teeth and double teeth in each rotation of the gear teeth, the contact half width during meshing of the gear teeth, the tooth profile involute arc length of the gear teeth and the conduction thermal resistance of each temperature gradient layer in the radial direction and the circumferential direction are calculated, and the conduction thermal resistance, the tooth crest tooth thickness and the tooth crest surface heat exchange area of a gear pair during meshing alternation of the single teeth and the double teeth of the gear teeth are considered; the gear teeth have a convective heat exchange area in a non-contact area; calculating a convective heat transfer coefficient and convective heat transfer heat resistance of each non-contact surface and heat flux generated by friction at a gear tooth meshing position; and listing an instantaneous heat balance equation, and calculating to obtain the real-time temperature of each node of the gear in the movement process of the gear pair. By means of the technical scheme, changes of conduction thermal resistance and convection thermal resistance in the gear tooth meshing process and influences on gear tooth heat transfer are studied, and the gear temperature calculation accuracy is guaranteed.

The utility model discloses a DP double-tooth rack phase angle automatic detection integrated device, which comprises a shell, the inner side wall of the shell is fixedly connected with a supporting plate, and the upper surface of the supporting plate is fixedly connected with a first servo rotating mechanism. Through cooperation of the angle display instrument, the first servo rotating mechanism, the second servo rotating mechanism, the positioning and leveling mechanism and the angle sensor, rapid measurement is facilitated, the measurement waiting time is shortened, the measurement efficiency is improved, the measurement result of each workpiece can be displayed through the angle display instrument and can be obtained without a series of complex conversions, and the measurement accuracy is improved. Measurement operation is quicker and simpler than three-coordinate measurement, manual measurement of operators is not needed, manual judgment risks are reduced, wrong detection and missing detection are avoided, the operators only need to place a skip car filled with workpieces at a designated position and press down an in-place switch, equipment automatically measures and records to form a database, detection data are stored in the background, and the system is convenient to use. And processing capacity data analysis in the monitoring forming process is facilitated.

The utility model discloses a durable double-tooth high-speed steel band saw blade, and relates to the technical field of double-tooth saw blades, the durable double-tooth high-speed steel band saw blade comprises a saw blade body and a saw body, the side walls of the two ends of the saw blade body are fixedly connected with anti-oxidation layers, the side wall of each anti-oxidation layer is fixedly connected with a wear-resistant layer, the side wall of the saw blade body is fixedly sleeved with a reinforcing sleeve, and the reinforcing sleeve is fixedly connected with the saw body. First mounting openings are formed in the side walls of the two ends of the saw blade body correspondingly, second mounting openings corresponding to the first mounting openings are formed in the surface of the reinforcing sleeve correspondingly, mounting rods are fixedly connected to the side walls of the two ends of the saw blade body correspondingly, and a limiting plate is fixedly connected to the rod wall of one end of each mounting rod. One end of the mounting plate is clamped with the side wall of one end of the corresponding limiting plate through the anti-skid rubber pad, so that the saw blade body and the saw body are connected more firmly, the mechanical strength of the saw blade body is improved through the reinforcing sleeve, and the service life of the saw blade body is prolonged.

A kind of compressor oil injector pumping device, including fixed part and compression part;Fixed part is L-shaped, and the L-shaped one end of it is buckle end, and the other end is first connecting end;Buckle end adopts double-tooth structure, and is connected with the oil inlet pipeline screw cap of the oil injector;Compression part one end is operating end, and the other end is second connecting end;First connecting end is connected with second connecting end;Compression part is connected with the oil injection rod of the oil injector.The use method of the device is as follows: the double-tooth structure of the buckle end of the pumping device is connected at the oil inlet pipeline screw cap of the oil injector;Compression part is placed on the oil injection rod of the oil injector;Press operating end to make the oil injection rod of the oil injector be pressed down;Compression part restores to initial position;Repeat the above steps, realize the pumping of the oil injector pumping device.The device has buckle end with double-tooth structure and operating end, so that the connection of the device is more stable, and operation is more convenient, safe and efficient.

The utility model discloses a fixture device for grinding teeth at the power-assisted end of a double-tooth rack, which comprises a carrier plate, a radial clamping mechanism, an axial clamping mechanism, a limiting component and a blowing component, the radial clamping mechanism, the axial clamping mechanism, the limiting component and the blowing component are all arranged on the carrier plate, and the radial clamping mechanism, the axial clamping mechanism, the limiting component and the blowing component are arranged on the carrier plate. The axial clamping mechanism is used for clamping the two ends of a to-be-machined double-tooth rack, the to-be-machined double-tooth rack comprises a steering end and a to-be-machined power assisting end which are connected with each other in the axial direction of the to-be-machined double-tooth rack, an interval groove used for containing the power assisting end is formed in the limiting component, and the radial clamping mechanism is used for clamping the steering end. An air outlet of the air blowing component faces the machining face of the power assisting end. The axial clamping mechanism and the radial clamping mechanism are used for axial clamping and radial clamping of the to-be-machined double-tooth rack correspondingly, limiting is achieved in the limiting component, and therefore the positioning effect is effectively enhanced, and the tooth machining stability of the power assisting end is improved.

Mechanical reduction gear (28) for an aircraft, comprising: - a first sun gear (32) with external teeth (32a), - a fixed ring gear (38) with internal teeth (38d), - a movable ring gear (56) with internal teeth (56a), - planet gears (34) with double teeth (34a, 54a), and - a second sun gear (70) with external teeth (70a), the reduction gear being without planet carriers. Figure for the abbreviation: Figure 6

The present application provides a double-tooth stator core and motor, wherein the double-tooth stator core comprises a plurality of stator laminations, the stator laminations comprising a plurality of sequentially connected stator units, the stator units having a second tooth portion, a yoke portion and a first tooth portion, a wall surface shape of the first tooth portion facing away from the second tooth portion matching a wall surface shape of the yoke portion facing away from the second tooth portion. The defect of low material utilization rate of the stator lamination in the prior art can be overcome.

The application belongs to the technical field of pipeline joint detection, and discloses a nondestructive testing equipment for pipeline fusion joint of HDPE double-layer pipe, which comprises a workbench, a protective shell is fixedly connected to the middle of the workbench, and a vacuum air extraction box is fixedly connected to the edge of the workbench. Through the cooperation of the double-tooth ring, the single-tooth ring, the moving plate and the protective shell and other structures, the surface flaw and leakage detection of the fusion pipeline are facilitated. The second gear is driven to rotate by the inner teeth of the double-tooth ring, and the industrial camera is driven to rotate at 360 degrees on the surface of the pipeline in cooperation with the setting of the single-tooth ring, so that non-dead-angle detection is realized. The pipeline is filled with water, and the leakage can be detected. Compared with the reagent detection of the comparative file, the device can form a negative pressure state outside the pipeline by the sealing setting of the sealing sleeve, the fixing cover and the protective shell, cooperate with the vacuum air extraction box, increase the water pressure inside the pipeline, and effectively improve the detection efficiency.