13results about How to "Avoid drilling" patented technology

The utility model relates to a ventilation equipment technical field discloses a kind of building ventilation flue, including ventilation pipe, the inside of ventilation pipe is provided with ventilation opening, the outside of ventilation pipe is provided with mounting connector, the outside fixed connection of the blower base is provided with blower, the bottom fixed connection of the hydraulic press base is provided with hydraulic press, the outside one side of ventilation opening is provided with wind shield plate.The utility model has the following advantages and effects: the threaded connection of the threaded interface of ventilation pipe and mounting connector is connected, then starting blower, make the flow of air pass through ventilation opening, then starting hydraulic press, make wind shield plate away from ventilation opening, ventilation opening opens, air blows out from ventilation opening to start ventilation in building, when the ventilation is not needed in some building indoor, close the hydraulic press in the inside of its corresponding building indoor ventilation pipe, no longer ventilate for it, and the effect that the effect of building ventilation flue installation is good and ventilation is good is realized through the above operation.

The application discloses a kind of accelerometer fault detection methods of rotary steerable drill posture measuring device, comprising: step S1, the Kalman filter of constructing rotary steerable drill posture measuring device system;Step S2, according to Kalman filter, the output estimation error of rotary steerable drill posture measuring device system and its digital features are calculated;Step S3, according to the output estimation error of rotary steerable drill posture measuring device system, residual error, evaluation function and threshold value are obtained;Step S4, according to residual error, evaluation function and threshold value, accelerometer fault detection decision is executed.The present application can realize the accurate detection of accelerometer fault under the condition that the probability distribution of noise is unknown, thereby effectively avoiding the rotary steerable drill along the wrong direction drilling, improve the reliability of rotary steerable drill posture measuring device, improve the work efficiency of rotary steerable drill.

The utility model discloses a pear tree insect-proof net cover convenient to mount and dismount, which relates to the technical field of pear tree insect prevention and comprises a cover body, two zippers are arranged on the cover body, a chain ring is arranged below the cover body, a connecting pipe is arranged at the connecting end of the chain ring, two pressing blocks are movably sleeved with the connecting pipe, and a pear tree is completely covered by the cover body. A chain ring penetrates through a group of connecting holes formed in the lower end of the cover body and is tightened at the moment, so that the lower end of the cover body is tightly attached to the pear tree trunk, the chain ring is fixedly connected with the two clamping blocks, and the whole cover body is tightly attached to the trunk, so that pests can be prevented from entering from a gap between the cover body and the trunk; the pears are protected, damage of pests to the pears is reduced, growth and fruit quality of the pears are protected, the cover body can be better fixed to the pears through fixing, displacement and damage caused by wind blowing shaking or tree trunk friction are avoided, the service life of the cover body is prolonged, and continuous and stable protection is provided for the pears.

This utility model discloses a down-proof down jacket, comprising a skin-friendly layer, an inner lining layer, and an outer fabric layer. The inner lining layer is made of two layers of high-density nylon lining fabric sewn together. The inner lining layer forms several down-filling cavities through quilted seams at intervals. The down-filling cavities are filled with down. A non-woven lining layer is sewn onto the outer surface of the high-density nylon lining fabric. Two layers of knitted terry cloth are embedded in the quilted seams of the inner lining layer. The surface of the knitted terry cloth has a knitted loop structure. In this utility model, knitted terry cloth is added at the quilted seams of two adjacent down-filling cavities. During the movement of the down, the knitted loop structure on the knitted terry cloth will wrap around the down, effectively preventing the down from escaping through the seam gaps.

The utility model discloses an anti-escape handrail for ostrich breeding, and aims to solve the problem that the risk that ostriches escape from gaps is increased due to the fact that an existing anti-escape handrail is difficult to be perfectly attached to the terrain, a large gap exists between the handrail and the ground, or smooth transition cannot be achieved at a bend. The handrail comprises a first supporting rod, a connecting block, a rotating rod, a rotating assembly and the like, a first adjusting handle is rotated to drive a worm to rotate, the worm rotates to drive a worm wheel to rotate, the worm wheel rotates to drive the rotating rod to rotate, and the rotating rod rotates to drive a rotating frame to rotate; the rotating frame rotates to drive the third supporting rod to rotate, the angle of the third supporting rod can be adjusted according to the terrain change, it is guaranteed that the distance between the handrail and the ground is always kept within a proper range, the ostriches are prevented from getting out of the lower portion of the handrail, and the overall protection effect can be guaranteed.

The present application relates to the technical field of basic drilling equipment, and particularly relates to a manual hole digging pile water mill drill, which comprises a base, a guide rail, a motor and a cylinder drill, a first sliding sleeve and a second sliding sleeve are slidably connected to the guide rail, a fixed arm is fixedly connected to the outside of the first sliding sleeve, a first guide hole is formed in the top of the cylinder drill, and a second guide hole is formed in the fixed arm. When the cylinder drill drills a disc of depth, a bolt is sequentially inserted downward through the second guide hole and the first guide hole, and finally inserted into the gap between the rock core and the inner side wall of the cylinder drill. The lower end of the bolt is inserted into the gap between the rock core and the inner side wall of the cylinder drill by the second driving assembly. Thus, the rock core is broken, and the rock core is fixed in the inner side of the cylinder drill, which facilitates the rock core to be taken out from the hole through the cylinder drill, and improves the construction efficiency. The technical scheme is mainly used for foundation excavation, and solves the problem that the existing water mill drill is inconvenient to take out the drilled rock core.

The application discloses a kind of pre-embedded pipe earth-rock dam cutoff wall structure and defect detection and repair method, "U-shaped" flower pipe is pre-embedded in cutoff wall and is evenly arranged along cutoff wall axis, and flower pipe is filled with colored dye agent;Through dam body seepage pressure monitoring, colored dye agent migrates with seepage and dam downstream water weir seepage flow changes, the position and nature of earth-rock dam seepage can be preliminarily evaluated;Using the "U-shaped" pre-embedded flower pipe in concrete cutoff wall, the defect of cutoff wall can be detected by pre-embedded flower pipe seepage flow detection, pre-embedded flower pipe seepage digital imaging and pre-embedded flower pipe water pressure test;After accurately detecting the defect of cutoff wall, the grouting repair method in cutoff wall pre-embedded pipe uses pre-embedded "U-shaped" flower pipe to carry out local chemical grouting, low disturbance and high efficiency, realize the accurate repair of seepage cutoff wall.

The utility model discloses a fixed structure for door pocket is applied to, including door frame, retaining piece, fastener and wall. The middle of door frame is equipped with the installation area, is equipped with retaining piece in the installation area, and the middle of retaining piece forms the keeping area. Wall is equipped with fastener, and fastener is by thread section, hex section and stopper rod and is composed, and stopper rod inserts to keep area with retaining piece cooperation limit. This fixed structure for door pocket is applied to through setting retaining piece and fastener, can avoid the drilling of door frame outside, will not influence the appearance of door frame. Meanwhile cooperation fastener and retaining piece can play the effect of quick installation, and still can strengthen the stability and the connecting strength between door frame and wall.

The utility model relates to the field of sewing equipment, in particular to down-proof sewing equipment for down jackets, which comprises a bearing table. A rolling assembly is fixedly connected to one side of the bearing table, a slidable edge pressing assembly is arranged on the side, away from the rolling assembly, of the upper end of the bearing table, and a pressing assembly is fixedly connected to the side, close to the rolling assembly, of the upper end of the bearing table. According to the sewing machine, clothes are placed on the bearing table and located under the overlock machine body on the bearing table, the edge pressing assembly moves to the position appropriate to the overlock machine body according to sewing requirements, the clothes are pressed, sewing operation is conducted in cooperation with the overlock machine body, then the pressing assembly is started, and the overlock machine body is pressed. By means of the method, gaps generated in the sewing process are reduced, the down feather is difficult to drill out, it is guaranteed that the down feather in the down jacket is evenly distributed, the stable heat preservation performance is maintained, the situation that the local heat preservation performance is reduced due to down feather drilling is avoided, and the product quality is improved.

This invention relates to the field of dental implant technology, specifically to a biomedical dental implant precision positioning guide device, comprising a base guide plate and an upper implant guide plate. The base guide plate has an arc-shaped structure and is installed on the side of the patient's missing tooth in the oral cavity. Multiple positioning cylinders are integrally formed on the base guide plate. The base guide plate and the implant guide plate are fixedly connected by a connecting plate. The implant guide plate forms multiple implant openings. An adjustment opening is provided near the outer side of the oral cavity and communicates with the implant opening. A positioning component can be detachably installed in the implant opening. A toothed groove can be detachably installed on the implant guide plate, which cooperates with the side of the patient's oral cavity with the missing tooth to achieve initial positioning. After positioning, the toothed groove is removed, and a guide sleeve is installed in the through hole. The positioning component of this invention achieves X and Y bidirectional precision micro-adjustment control through a slider and four guide rods forming a double guide rod system. A guide sleeve is screwed onto the slider to provide positioning guidance for the drill rod and protect the through hole from damage. The top limits the drill head to prevent the drill rod from excessively drilling and damaging the alveolar bone.

This invention relates to the technical field of vulcanizing injection molds, and particularly to a vulcanizing injection mold and its demolding system. The vulcanizing injection mold includes an ejector pin assembly, an upper mold assembly, a middle mold assembly, a lower mold assembly, and a mold base assembly. The lower mold assembly has an ejector pin through hole, which includes a material well hole, an inverted conical hole, and a straight cylindrical hole. The ejector pin column includes an inverted conical section and a straight cylindrical section. The end of the straight cylindrical section away from the inverted conical section is vertically and vertically connected to the mold base assembly. When the mold is closed, the inverted conical section is located inside the inverted conical hole. The vulcanizing injection mold can prevent rubber material from entering the gap between the ejector pin column and the ejector pin through hole, avoid ejector pin jamming, improve demolding efficiency, and reduce maintenance costs. It solves the problems of existing ejector pin structures easily causing ejector pin jamming, which prevents the rubber part from being ejected smoothly, affecting demolding efficiency, or causing rubber leakage, which makes it difficult for the rubber material to completely and evenly fill the injection mold cavity, affecting product quality, and the problems of difficult-to-clean leaked rubber material and high maintenance costs.

The utility model discloses a kind of online analysis chlorine content's ultraviolet analyzers, it is related to ultraviolet analyzer technical field, including ultraviolet analyzer body, ultraviolet analyzer body further includes box shell, several heat dissipation holes are provided on the box shell, installation port is opened in the at least one side of the box shell, detachably set with mounting plate on the installation port, several the heat dissipation holes are opened on the mounting plate, the side of the mounting plate is provided with several dustproof baffle cover, every dustproof baffle cover corresponds every the heat dissipation hole, detachably set with filter component on the side of the mounting plate away from the dustproof baffle cover, the bottom between the mounting plate with the installation port is provided with clamping component, the both sides of the mounting plate are with the box shell between being provided with plug-in component, dustproof baffle cover can avoid dust directly falling into ultraviolet analyzer body inside, prevent dust from accumulating in ultraviolet analyzer body inside, filter component further prevent dust and floating object from drilling into its inside.