49results about How to "Avoid drilling" patented technology

The invention discloses a fabricated building photovoltaic roof module. The roof module comprises a roof plate, inserting blocks are fixedly connected to the two adjacent sides of the roof plate, and inserting grooves are correspondingly formed in the other two adjacent sides of the roof plate. A protection assembly is arranged at the upper end of the roof plate, a photovoltaic support is arranged in the protection assembly, the photovoltaic support is rotationally installed in the protection assembly through a supporting shaft, and a photovoltaic plate is fixedly connected to the upper end face of the photovoltaic support; a power mechanism and an angle adjusting mechanism are arranged in the protection assembly, the angle adjusting mechanism is used for adjusting the angle of the photovoltaic support, and the power mechanism is used for providing power for the angle adjusting mechanism. In the assembling process, the photovoltaic panel and the roof plate can be quickly assembled together, so that the assembling time is shortened, meanwhile, drilling in the roof is avoided, and the protection on the roof is improved.

The utility model particularly relates to a display cabinet for flood-proof mute secondary water supply equipment and a display device of the display cabinet. The display cabinet comprises a frame and waterproof glass fixedly connected to the four sides of the frame. The frame and the waterproof glass jointly form a semi-closed space with an opening and an inner cavity, and anti-flooding mute secondary water supply equipment is contained in the inner cavity through the opening. A water inlet pipe and a water outlet pipe of the flood-proof mute secondary water supply equipment are both arranged in the inner cavity and used for enabling water injected into the inner cavity to form internal circulation. According to the display cabinet, the frame and the waterproof glass form the semi-closed display cabinet body, and the water inlet and the water outlet which are formed in the frame are linked with the flood-proof mute secondary water supply equipment arranged in the inner cavity to realize internal circulation of water, so that the flood-proof mute effect of the flood-proof mute secondary water supply equipment can be displayed in real time; the device has the advantages of simplicity, convenience and practicability.

The invention discloses a lossless reinforcing device and reinforcing method applied to a single-angle steel structure of a power transmission tower, the lossless reinforcing device is connected to the single-angle steel structure of the power transmission tower, and the lossless reinforcing device comprises a buckle, reinforcing angle steel and at least two limiting plates; the limiting plates are fixedly connected to the reinforcing angle steel at intervals, clamping grooves matched with the back of the single-angle steel structure are formed in the limiting plates, the reinforcing angle steel is connected with the back of the single-angle steel structure in a clamped mode through the clamping grooves of the limiting plates to form symmetrical attaching pieces with cross-shaped cross sections, and rapid limiting of the reinforcing angle steel relative to the single-angle steel structure is achieved. The buckles are connected with the limb tips, on the same side relative to the symmetry axis, of the attaching pieces in a clamped mode to achieve fixation between the reinforcing angle steel and the single-angle steel structure. The lossless reinforcing device has the beneficial effects that the purpose of improving the compression and bending stable bearing capacity of the single angle steel of the power transmission tower is achieved, drilling and welding on the original angle steel are avoided, and in-situ lossless reinforcing can be achieved.

The invention relates to the technical field of drought monitoring, and discloses a steppe drought monitoring device and method capable of being remotely monitored, the steppe drought monitoring device capable of being remotely monitored comprises a frame, an electric sliding rail is fixedly installed on the outer side of the frame, a supporting column is fixedly installed on the outer side of the frame, and a detection assembly is arranged on the outer side of the frame. According to the steppe drought monitoring device and method capable of being remotely monitored, in order to enable the device to more comprehensively monitor soil humidity conditions at different positions, a detection assembly is arranged and cooperates with an electric sliding rail on a frame to drive a mounting plate to move through a sliding block, and a servo motor drives a threaded rod to drive a threaded cylinder to ascend and descend; the inner motor in the threaded cylinder drives the drill bit, a probe of the main humidity detection device can extend out of the drill bit to detect soil humidity, the detection device can move in different areas of the grassland by means of the electric sliding rail, the one-sidedness of fixed detection is changed, and the soil humidity conditions at different positions are comprehensively and accurately monitored.

The invention relates to the technical field of machine manufacturing, in particular to a method for removing a fractured bolt in the installation process of a wind generating set, which comprises the following steps of: 1, finding and marking the position of the fractured bolt; secondly, the periphery of the fractured bolt is cleaned; thirdly, a thread taking tool is used for being fixed to the head of the fractured bolt; and fourthly, torque and outward axial tension are applied to the thread taking tool, so that the fractured bolt is gradually loosened till complete separation is achieved. The method has the beneficial effects that through the innovative solution provided by the invention, the broken bolt can be effectively and safely removed, the possibility of thread damage is reduced, and the mounting efficiency and safety of the wind generating set are improved.

The present application relates to the technical field of battery string production equipment, and particularly relates to a photovoltaic module string welding preparation method based on pre-coating of a soldering material, wherein after a solder strip is passed through an extrusion pushing mechanism, a traction member is used to fix the front part of the solder strip; the rear part of the solder strip is fixed by using a guide member, the extrusion pushing mechanism is started to uniformly coat the soldering material on the solder strip; after the soldering material is coated, a drying member is used to dry the soldering material, and a pretreated solder strip is obtained; the pretreated solder strip is moved to the surface of a battery piece and is compressed by a welding press, then the pretreated solder strip and the battery piece are heated for string welding, and after the hot string welding, lamination is performed, so that the soldering material and the battery piece grid line are dissolved and fused to form an alloy connection layer; by coating the soldering material on the solder strip and then welding the solder strip on the battery, the flowing adhesive film during welding can be prevented from penetrating between the solder strip and the battery piece, the occurrence of electrical interconnection isolation can be avoided, and the quality of the processed module is ensured.

The present invention relates to the technical field of ore crusher equipment, and specifically discloses an efficient discharging structure of an ore crusher, including a mounting frame, a crusher body is fixedly mounted on the upper end of the mounting frame, a feed port is provided on the upper end of the crusher body, and a discharging funnel is provided on the lower end of the crusher body. An L-shaped block is installed on the back of the discharging funnel, and the rear end of the L-shaped block and the guide frame are rotatably connected, and the output end of the driving motor is used to drive the driving rod to rotate in the mounting shell, and the second bevel gear on the outside of the driving rod is synchronously meshed with the first bevel gear, and the screw connected to the first bevel gear can rotate inside the rectangular tube. When the two screws rotate synchronously, the connecting rod threaded at the lower end slides and retracts at the rectangular tube, and at the same time, the lower end of the connecting rod and the sliding block sliding outside the front half of the guide frame are rotatably connected, so that the discharging angle of the guide frame can be conveniently adjusted according to the height of the collection container.

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.

The invention relates to the technical field of crop insect prevention, in particular to an insect prevention device for crop planting. The invention provides an insect prevention device for crop planting. The insect prevention device is convenient to operate and better in insect prevention effect. The insect prevention device comprises a first support, symmetrically-distributed side nets are fixedly connected to the first support, symmetrically-distributed insect prevention nets are fixedly connected to the first support, a second support is fixedly connected to the top of the first support, and symmetrically-distributed sliding frames are slidably connected to the first support. The insect-proof net can be quickly unfolded and folded through mutual cooperation of the sliding frame, the screw rod, the sliding piece and the like, when local area operation is needed, the insect-proof net in the area can be folded only by pulling out the plug pin in the area, great convenience is provided for workers, and meanwhile the work efficiency is greatly improved. And the side edges of all the insect-proof nets can be pressed tightly through the sliding frames, the pull ropes and the sealing pieces, pests are prevented from entering from gaps between the insect-proof nets and the first supports, and the insect-proof effect of the device is improved.

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 invention provides a hollow screw drill which is provided with a through mounting channel, the mounting channel is used for allowing a screen pipe to penetrate through, and the hollow screw drill comprises a drill bit and a screw rod, the screw motor is provided with a rotor pipe and a stator pipe, the stator pipe is arranged on the outer side of the rotor pipe in a sleeving mode, an inner cavity of the rotor pipe is located on the mounting channel, a gas channel is formed between the stator pipe and the rotor pipe, a threaded structure is arranged on the outer wall of the stator pipe, the screw motor is provided with an input end and a connecting end which are oppositely arranged, and the connecting end is in driving connection with the drill bit. The gas channel is connected with gas conveying equipment through an input end; the end cover is arranged at a port, close to one side of the input end, of the rotor pipe, the end cover is provided with a plugging plate, the plugging plate has a plugging state and a crushing state which are oppositely arranged, and when the plugging plate is in the crushing state, the screen pipe can enter an inner cavity of the rotor pipe. By means of the technical scheme, the problem that in the prior art, after a directional drilling tool is lifted out, drilling holes are prone to being blocked, and the whole-hole-section screen pipe cannot be efficiently put down can be solved.

The present invention discloses a cooling mechanism for a double-sided polishing machine, and relates to the technical field of double-sided polishing machines. The present invention comprises a base, one side of which is symmetrically fixed with a lower polishing motor and an upper polishing motor, and the other side of the base is fixed with lifting devices at positions corresponding to the lower polishing motor and the upper polishing motor; a liquid collecting bin is fixed on the base and located between the two lifting devices, and a liquid discharge port is provided on one side of the liquid collecting bin; an upper polishing assembly and a lower polishing assembly are rotatably arranged on the two lifting devices, respectively; and a cooling assembly is fixed in the liquid collecting bin. The present invention can clamp a plurality of circular workpieces through an auxiliary cooling assembly, and can preliminarily cool the polishing disc through the upper polishing assembly and the lower polishing assembly, and can secondarily cool the polishing disc through the auxiliary cooling assembly, and finally can cool the workpiece through the second cooling assembly, thereby greatly improving the cooling effect.

The utility model discloses an automobile engine cover plate with a protection structure, which comprises a cover plate main plate body, the front end of the cover plate main plate body is fixedly connected with a cover plate front decorative surface, and the rear end of the cover plate front decorative surface is provided with an impact protection component used for enhancing the strength of the cover plate main plate body. According to the automobile engine cover plate with the protection structure, the left reinforcing steel sheet, the right reinforcing steel sheet, the upper transverse reinforcing steel bar, the lower transverse reinforcing steel bar and the vertical reinforcing steel bar are arranged, so that when the automobile engine cover plate is used, the left reinforcing steel sheet, the right reinforcing steel sheet, the upper transverse reinforcing steel bar and the lower transverse reinforcing steel bar are arranged between the cover plate main plate body and the cover plate front facing; the left reinforcing steel sheet, the right reinforcing steel sheet, the upper transverse reinforcing steel bar, the lower transverse reinforcing steel bar and the vertical reinforcing steel bar form a steel reinforcing layer, the cover plate main plate body, the cover plate front decorative face and the steel reinforcing layer form a composite structure, when the top is hit, the bearing capacity can be increased, damage to an engine is reduced, the function of internally reinforcing and improving the protection performance is achieved, and the service life of the engine is prolonged. The problem that the device does not have the function of internally reinforcing and improving the protection performance is solved.

The utility model provides an anti-mosquito polypropylene sealing strip, which relates to the technical field of sealing strips and comprises a sealing strip body, the sealing strip body comprises an outer layer and a base layer, a convex block is mounted on one side of the outer part of the outer layer, a mounting block is mounted on one side, far away from the outer part of the convex block, of the outer layer, a groove is formed in the mounting block, and the groove is matched with the convex block. The base layer is arranged inside the outer side, an insect prevention mechanism is arranged inside the base layer, the insect prevention mechanism comprises a breathable layer, a first insect prevention layer and a second insect prevention layer, the breathable layer, the first insect prevention layer and the second insect prevention layer are sequentially distributed from top to bottom, and the breathable layer, the first insect prevention layer and the second insect prevention layer communicate with one another; the bottom end of the second insect-proof layer is attached to the bottom end of the interior of the base layer, a plurality of micropores are formed in the breathable layer, a soft metal wire mesh is arranged at the bottom end of the interior of the first insect-proof layer, and the interior of the second insect-proof layer is filled with mosquito-repelling pieces. According to the polypropylene sealing strip, the practicability of the polypropylene sealing strip can be effectively improved, and the polypropylene sealing strip has high practical value.

The utility model relates to the technical field of textile fabrics, and discloses a down-proof down jacket fabric, which solves the problems in the background technology, and comprises an outer fabric and an inner fabric which are sewn together, each of the outer fabric and the inner fabric comprises an electrostatic adsorption layer, the two electrostatic adsorption layers are arranged oppositely, and the electrostatic adsorption layers are arranged oppositely. According to the utility model, the down feather in the down feather filling space is uniformly adsorbed under the action of the static electricity, so that the down feather is prevented from being accumulated in a gap or a specific area and getting out of the gap or the specific area, and the down feather filling effect is improved. The seam shielding filler is sewn between the outer-layer fabric and the inner-layer fabric, and the seam shielding filler is used for shielding a sewn area, so that the down-proof effect is also achieved.

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 provides an insect-proof edge sealing type cupboard, which belongs to the technical field of cupboards, and comprises a base, a cupboard body, a table board, a cupboard door, a sealing strip, a storage box, a baffle plate, a guide rail, a partition plate, a limiting frame, a rotating shaft and a pulley. The insect bodies are prevented from directly entering the cabinet body from a gap between the cabinet door and the bottom of the cabinet body, when the insect bodies enter the cabinet body, the insect bodies fall into the storage box, at the moment, a sealing strip at the bottom of the closed cabinet door covers the upper end of the storage box to cover an opening of the storage box, and the storage box can be sealed; the kitchen insect-preventing device can be matched with a sealing strip to prevent insects from directly getting out, a sealing blocking structure is formed, the insects can be effectively prevented from getting into a cabinet, food sanitation is effectively guaranteed, and the conditions for kitchen insect reproduction can be reduced.

The utility model relates to the technical field of garment production, in particular to a breathable down jacket which comprises a down jacket body, the down jacket body is formed by sewing fabric, the fabric is formed by knitting an outer layer, an inner layer and an inner layer, the down jacket body is provided with a down dividing area, a combined down filling area and a breathable system, and the down dividing area comprises a first connecting band and a second connecting band. The first connecting band is formed by partially and integrally knitting an outer layer and an inner layer, the second connecting band is formed by partially and integrally knitting an inner layer and an inner layer, the combined down filling area comprises a first down filling area and a second down filling area, the first down filling area is arranged between the outer layer and the inner layer, and the second down filling area is arranged between the inner layer and the inner layer; the first down filling area and the second down filling area are further separated by the down separating area, and the ventilation system is arranged in the first connecting belt and communicated with the first down filling area. By the adoption of the integrated knitting technology, the multiple sets of down filling areas are formed, the situation that down is spaced through a traditional needle and thread sewing technology is avoided, and the down is prevented from penetrating out of needle holes.

The fixing device for bearing machining comprises an adjusting frame, a chuck and a fixing seat, the top of the right side of the adjusting frame is in transmission connection with the left side of the chuck, and the left side of the fixing seat is fixedly connected with the bottom of the right side of the adjusting frame. The limiting bolt is arranged and rotated, so that the limiting bolt rotates to move downwards so as to limit the bearing part leftwards, then the bearing part can be limited rightwards through the limiting arc strip, the limiting effect on the bearing part is improved, and the problem that the bearing part is limited leftwards only through a blocking piece, so that the service life of the bearing part is prolonged is solved. The problems that a bearing cannot be limited rightwards after being positioned and fixed, so that certain instability still exists in the bearing drilling process, meanwhile, the height of a blocking piece cannot be adjusted, and if the limiting height of the blocking piece is large, a drill bit of a perforating machine easily drills the blocking piece, so that the blocking piece is damaged and cannot continue to be limited are solved. And the effects of improving the stability and preventing the limiting piece from being damaged by drilling are achieved.

The invention provides an installation fastener, and relates to the technical field of building installation engineering, in order to solve the problem that in the prior art, structural parts are connected through welding or bolts, so that adjustment of the connection position is not facilitated, the installation fastener comprises a first fastener and a second fastener, the first fastener is provided with a first installation groove extending in the first direction, and the second fastener is provided with a second installation groove extending in the second direction. The first mounting groove is opened upwards, and the first mounting groove is used for mounting a first component arranged in the first direction; the second fastener is connected to the upper side of the first fastener and seals the upper opening of the first mounting groove, the second fastener is provided with a second mounting channel communicated with the first mounting groove, and the second mounting channel is used for mounting a second component arranged in the second direction. According to the mounting fastener, the mounting position of the first fastener relative to the second fastener is adjustable, the first fastener can move longitudinally and transversely to adjust the distance, and the mounting fastener can be detached, mounted for multiple times and recycled.

The utility model discloses a high-reliability double-line fine-thread dry wall nail, and belongs to the technical field of fasteners. Comprising a dry wall nail body, four non-return assemblies are arranged on the outer side of the bottom end of a nail head and used for assisting in fixing the dry wall nail body, and a nail point assembly is arranged at one end of the dry wall nail body and used for positioning and straightening the dry wall nail body. The nail point tip and the positioning tip in the nail point assembly are arranged on the same horizontal plane, so that the positioning tip and the nail point tip make contact with an object at the same time, the nail point tip is prevented from obliquely punching and drilling into the object, and the use strength is improved.

The utility model discloses a cable bridge with a rat-proof function, which comprises a bridge main body, a tail end protection mechanism, a connection protection mechanism and a ventilation protection mechanism, the tail end of the bridge main body is fixedly provided with tail end protection shells in an up-down symmetrical manner, the tail end protection shells are externally and symmetrically fixedly provided with mounting plates, and the mounting plates are fixedly connected through bolts. A glue storage bin is formed in the tail end protection shell after the tail end protection shell is spliced, a glue injection pipe is arranged in the middle of the upper tail end protection shell in a communicating mode, one side of the tail end protection shell is sleeved with a rubber end cover, a connecting protection mechanism is arranged at the connecting position of the bridge body, and ventilation protection mechanisms are arranged on the two sides of the bridge body. According to the utility model, after the tail end protection shell covers the tail end of the bridge main body, the sealant is injected through the sealant injection pipe and is filled and solidified in the sealant storage bin, so that full plugging is realized, mice are effectively prevented from entering the cable bridge through gaps, and external air and the interior of the bridge main body are circulated through the ventilation opening and the ventilation hole; the ventilation holes are small, so that mice are prevented from entering while ventilation and heat dissipation are achieved.

The utility model relates to the technical field of dustproof baffles, in particular to a dustproof baffle drilling fixing device which comprises a machining table, a first fixing plate arranged on one side of the machining table, a second fixing plate installed opposite to the first fixing plate, a long connecting rod arranged on one side of the second fixing plate, a short connecting rod installed on one side of the long connecting rod, and a rotating disc installed on one side of the short connecting rod. A small cylinder is mounted on the other side of the short connecting rod, an extension table is arranged on one side of the small cylinder, and a limiting shaft is slidably sleeved with the extension table; the device has the beneficial effects that the output end of a small air cylinder is driven to stretch out to drive a rotating disc to rotate, so that the rotating disc drives a long connecting rod and a short connecting rod to move, and a first fixing plate and a second fixing plate move in the direction close to a machining table under the driving action of the long connecting rod and the short connecting rod; accordingly, the dustproof baffle is fixed to the machining table under the pressing action of the first fixing plate and the second fixing plate, dismounting and mounting are convenient, the machining efficiency is improved, the mode that an operator presses and fixes the dustproof baffle is avoided, and the machining precision is improved.

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.