36results about How to "Clean operating environment" patented technology

The invention discloses a method for compositely controlling attitudes and orbits of in-orbit dragging combination spacecrafts. The method includes steps of identifying mass property parameters of the combination spacecrafts in an in-orbit manner; determining composite control on the attitudes and the orbits of the combination spacecrafts in orbit maneuver periods. The method has the advantages that abandoned spatial targets can be deorbited and maneuvered under the conditions of high disturbance torque and uncertain parameters; the method can be used for cleaning abandoned satellite or space debris in the earth orbit, and accordingly clean running environments can be provided for satellites which run normally.

The invention discloses a three-dimensional computerized numerical control sawing machine, which mainly comprises a frame (1), longitudinal guide rails (2), an upper machine box (3), a lower machine box (4), transverse guide rails (5), a worktable support (6), an electrical control system (7), a transmission system (8) and other parts, wherein the upper machine box (3) and the lower machine box (4) are arranged on rigid frame (1) to move along the longitudinal guide rails (2) under control and move together with the frame (1) as a whole along the transverse guide rails (5) under control; a power box (401) performs a reciprocating motion to draw a tightened saw blade (301) and rotates under control to ensure a saw cutting edge direction is consistent with a saw cutting operation direction;and three-dimensional motions are monitored by a displacement sensor and fed back to the electrical control system (7) to be treated by a computer in real time, and saw cutting tracks may be various complex plane geometrical curves.

The invention discloses a pressurized-gasification solid-state wet-type deslagging device for a carbonaceous organic material, consisting of an upper slag bucket and a lower slag bucket, a high-temperature ash residue inlet pipe (17) is arranged at the top end of the upper slag bucket, a jacketed pipe (1) is arranged outside the high-temperature ash residue inlet pipe (17), a water or low-temperature gas inlet (2) is arranged on the jacketed pipe (1), and the lower end of annular space of the jacketed pipe (1) is open; an upper slag bucket temperature test port (6), an upper liquid level meter installation port (3), a lower liquid level meter installation port (5) and a high pressure water overflow vent (4) are arranged at the middle part of the upper slag bucket, and the high pressure water overflow vent (4) is positioned below the upper liquid level meter installation port (3); a high pressure water inlet (7) and a circulating water inlet (8) are arranged at the lower part of the upper slag bucket; the bottom part of the upper slag bucket is provided with an upper slag bucket deslagging pipe (18) on which a loosened water inlet (9) is arranged; an upper valve (10) of the lower slag bucket is connected with the upper slag bucket deslagging pipe (18) and a lower slag bucket deslagging pipe (13) which is positioned in the middle of the top of the lower slag bucket; a pressure test port (11) and a pressure reducing port (12) are arranged on two sides of the lower slag bucket deslagging pipe (13) at the top of the lower slag bucket; and a pressurized water inlet (14) and a circulating water outlet (19) of the lower slag bucket are arranged at the upper part of the lower slag bucket, a lower slag bucket temperature test port (15) is arranged at the middle part, and a lower valve (16) of the lower slag bucket is arranged at the bottom part. The invention has simple structure, small maintenance quantity, long operation cycle and environment-friendly operation.

The invention relates to a method for treating complex gold concentrate cyanidation tailings through microwave chloridizing roasting and volatilization. The method comprises the following steps: feeding a complex gold concentrate cyanide tailing mixture containing a chlorinating agent into a disk granulator, so as to obtain green pellets; sending the green pellets into an industrial microwave oven, setting certain temperature and time, and carrying out drying, preheating and roasting volatilization in sequence, so as to obtain volatilized flue gas and hot pellets, wherein the obtained flue gas contains valuable metals such as gold, silver and copper; leading the flue gas into a wet process recovery system via a draught fan for recovery; and sending the hot pellets into a pellet storage yard for sale after cooling. According to the method, the grade of gold in the tailings can be substantially lowered, the operation is easy and the technological process is short, the reaction temperature and time are reduced, and the subsequent treatment of the valuable metals such as gold in the discharged flue gas is relatively easy, and the production efficiency is improved.

The invention relates to outer hood cutting equipment for a glass epoxy antenna. The equipment comprises a cutting base which is provided with a lateral fixing rod and a vertical fixing rod in a fit manner, wherein a working platform elevating mechanism is arranged on the lateral fixing rod and the vertical fixing rod in a fit manner, a working platform is arranged on the lateral fixing rod, and the working platform and the lateral fixing rod are arranged in a fit manner through a lateral displacement mechanism which is arranged in a direction of front to back; a left cutting mechanism and a right cutting mechanism which are arranged on the same lateral height are respectively arranged on the left side and the right side of the cutting base; an upper cutting mechanism and a lower cutting mechanism are correspondingly arranged at the top and the lower part of the cutting base; the working platform elevating mechanism, the lateral displacement mechanism, the left cutting mechanism, the right cutting mechanism, the upper cutting mechanism and the lower cutting mechanism are connected to a control mechanism. Through the adoption of the cutting equipment disclosed by the invention, the production and processing cycle of the outer hood of the glass epoxy antenna is shortened, the working efficiency is improved, the precision of products is improved, the probability that when an operator cuts the burrs of glass-reinforced plastics, particles are sucked in the body of the operator is reduced, the human body of the operator is guanrateed to be healthy, and the operating environment is clean and environmental-friendly.

The invention provides a splice-type integrated inspection well. The inspection well is an integrated piece which mainly consists of a chassis, a side wall and a cover plate, wherein the side wall is an integrated side wall formed by splicing a plurality of wall plates in the peripheral direction; and the bottom end of the side wall is spliced with the chassis, and the upper part of the side wall is connected with the cover plnate to form a sealed shape. When being applied to a project, the invention has the advantages of great convenience for construction, fast field installation, clean operational environment, no need of special maintenance and no influence on construction period; since the splicing structure of split-type components is reasonable and a convex edge is in interference with a groove, the invention has good sealing performance and can effectively prevent soil pollution caused by leakage of harmful substances contained in water body in the inspection well; and PVC plastic which is adopted as the materials for the split-type components in the invention has strength and toughness, is not easy to damage when being impacted by the water body, and has corrosion resistance, thereby the splice-type integrated inspection well almost needs not to be maintained, and saves labor.

The invention relates to an automobile cooling system liquid adding device and a method thereof. The device comprises a three-way connector and a vacuum generator. The lower end of the three-way connector is connected with an opening of an automobile cooling system water tank through a quick connector, the left end and the right end of the three-way connector are respectively provided with a quick opening valve, the quick opening valve at one end is connected with the vacuum generator, and the quick opening valve at the other end is inserted into a cooling liquid tank through a flexible pipe. In the liquid adding process, first the quick opening valve on the cooling liquid tank side is closed, the quick opening valve on the vacuum generator side is opened, compressed air is introduced into the vacuum generator, a pipeline of the automobile cooling system is vacuumized, the vacuum degree is controlled by controlling the flow of the air introduced into the vacuum generator, then the quick opening valve on the vacuum generator side is closed, and the quick opening valve on the cooling liquid tank side is opened. Under the effect of atmosphere, cooling liquid in the cooling liquid tank is fully injected into the pipeline of the automobile cooling system instantly. The whole liquid adding process is quick and convenient, the adding quantity is accurate, operation environment is clean, and an engine does not need to be started.

The invention discloses a scheelite decomposing method. The method comprises the following steps: after cation exchange resins and phosphoric acid solution are heated and uniformly mixed, scheelite is added for decomposing; and after the decomposing reaction is finished, phosphotungstic heteropoly acid solution is obtained through filtration and separation. The method uses the cation exchange resins for cooperating with the phosphoric acid to decompose the scheelite to directly obtain the phosphotungstic heteropoly acid solution with higher purity, so that the problem of influence on the resolution ratio by wrapping of the scheelite by tungstic acid in the process of decomposing the scheelite by traditional acid is solved, the problem of equipment corrosion due to use of concentrated acid in traditional acid decomposition is overcome, and the high-efficiency clean decomposion of the scheelite is realized.

The invention discloses a visible cover on spinning frame head of ring throstle, arranging a transparent side cover plates on each of the two sides of an engine frame, arranging a transparent end cover plate on the end surface of the engine frame, arranging a transparent top cover plate over the engine frame, where the outer edges of the transparent top cover plate are joined with the transparent side cover plates and end cover plate. The mentioned cover plates are all made of transparent materials. Thus, the intruding of flying cotton and floating dust and the splashing and overflowing of lubricant are prevented effectively and it is able to extremely observe the running and lubricating situation of engine driving equipment, effectively ensuring the smooth running and good lubricating of engine driving system of a spinner.

The invention relates to a portable calibration device for a parking braking performance tester. The portable calibration device for the parking braking performance tester comprises a force application system, a stress system and an auxiliary structure, wherein the force application system comprises a force application end, a worm and gear boost device, a force application lead screw and a force application link joint, the stress system comprises a stress link joint, a movable stress-end joint, a standard sensor, a sensor double-thread connection piece and a movable fixed-end joint, the auxiliary structure comprises a separating plate, an outer shell and a lever, the worm and gear boost device is installed at the force application end, a worm gear of the worm and gear boost device is connected with the force application lead screw in a meshing mode, the rear end of the force application lead screw is connected with the lever through the force application link joint, the lever is connected with the movable stress-end joint through the stress link joint, the movable stress-end joint is connected with the standard sensor through the sensor double-thread connecting piece, the movable fixed-end joint which corresponds to the movable stress-end joint is installed at the force application end, and a tested sensor is connected between the sensor double-thread connecting piece and the movable fixed-end joint.

The invention relates to the technical field of genealogical inheritance, in particular to an individual-oriented intergenerational inheritance data management system and method. The individual-oriented intergenerational inheritance data management method proposed by the invention comprises a user registration step, a file uploading step, a data storage step, an intergenerational graph generation and display step, a graph correlation step, a file downloading step and a data retrieval step. According to the method, a genealogical type independent genealogy compiling mode is broken through; all registered users are included in a unified tree genealogical diagram, or mutually independent genealogies are combined into a bigger genealogy; information channel advantages of the internet are fully utilized; and member data is linked in each member node of the tree genealogical diagram, so that users can obtain user information, intergenerational inheritance information, family culture data and ancestor history data more conveniently, visually and quickly, and officials or social organizations can conveniently perform history research based on the genealogy.

The invention discloses a fresh cocoon cooking device which comprises a rectangular fresh cocoon cooking device body. The rectangular fresh cocoon cooking device body is installed on a support. The fresh cocoon cooking device further comprises a conveying belt. The conveying belt penetrates through the rectangular fresh cocoon cooking device body. The conveying belt is installed on two transmission shafts. Either transmission shaft is connected with a variable speed motor. A steam pipe is arranged on the rectangular fresh cocoon cooking device body. A control valve is arranged on the steam pipe. The fresh cocoon cooking device has the advantages that the cocoon cooking time and temperature are easily controlled, the scale production can be achieved, and the reeling silk quality is ensured.

The invention relates to a carbonaceous organic material pressurized-gasification solid wet deslagging device comprising an upper slag bucket and a lower slag bucket, wherein the top end of the upper slag bucket is provided with a high-temperature ash inlet pipe (17); a jacket pipe (1) is arranged outside the high-temperature ash inlet pipe (17) and provided with a water or low-temperature gas inlet (2); the lower end of the annular gap of the jacket pipe (1) is open; the middle of the upper slag bucket is provided with an upper slag bucket temperature measuring port (6), a liquidometer upper mounting port (3), a liquidometer lower mounting port (5) and a high-pressure water overflow port (4); the high-pressure water overflow port (4) is lower than the liquidometer upper mounting port (3); the lower part of the upper slag bucket is provided with a high-pressure water inlet (7) and a circulating water inlet (8); the bottom of the upper slag bucket is provided with an upper slag bucket slag drop pipe (18) which is provided with a loose water inlet (9); a lower slag bucket upper valve (10) is connected with the upper slag bucket slag drop pipe (18) and a lower slag bucket slag drop pipe (13); the lower slag bucket slag drop pipe (13) is positioned in the middle of the top of the lower slag bucket; two sides of the lower slag bucket slag drop pipe (13) at the top of the lower slag bucket are provided with a pressure measuring port (11) and a depressurizing port (12); the upper part of the lower slag bucket is provided with a lower slag bucket pressurizing water inlet (14) and a circulating water outlet (19); the middle of the lower slag bucket is provided with a lower slag bucket temperature measuring port (15); and the bottom of the lower slag bucket is provided with a lower slag bucket lower valve (16). The invention has the advantages of simple structure, low maintenance amount, long operation cycle and friendly operating environment.

The invention relates to the field of mechanical equipment safety protection, in particular to an anti-glide safety device. The anti-glide safety device aims at solving the problem that after a vertical lifting device is powered off or a lifting mechanism loses efficiency, the reliability is poor when a lifted object falls to generate risks. The anti-glide safety device is characterized by comprising an anti-glide lock hook, an anti-glide lock hook seat plate, a linkage rod, a traction electromagnet, a linkage rod pin shaft, a lock hook pin shaft and a protection cover. The anti-glide lock hook is movably connected with the anti-glide lock hook seat plate; one end of the linkage rod is movably connected with the inner side of the anti-glide lock hook, and the other end of the linkage rod is movably connected with the traction electromagnet through the linkage rod pin shaft; the traction electromagnet is fixedly connected with an inclined plate on the anti-glide lock hook seat plate; and the anti-glide lock hook seat plate is covered with the protection cover. According to the anti-glide safety device, the anti-glide lock hook is reliably clamped into a wedge block or a lock hole under the effect of self weight of the lifted object, the anti-glide lock hook can be naturally in the locking state after power is off, the bearing capacity is high, and the anti-glide safety device has the beneficial effects of being simple in structure, convenient to operate and wide in application scope.

The invention discloses a nonferrous metal derusting device. The nonferrous metal derusting device comprises an operating platform, wherein a mounting rack is installed on the top wall of the operating platform, a plurality of conveying rollers are symmetrically arranged on the two sides of the mounting rack, the two ends of a rotating shaft of each conveying roller are rotatably connected with bearings, and each bearing is installed on the top wall of the operating platform through a bearing pedestal; a first belt wheel is installed at one end of the rotating shaft of each conveying roller, afirst motor is installed on the top wall of the operating platform, and a first belt wheel is installed at the driving end of the first motor; and a first belt is jointly wound between the first beltwheel close to one side of the first motor and the first belt wheel at the driving end of the first motor. By arranging each structure, nonferrous metals can be conveyed, polished and derusted, all-round thorough derusting treatment can be realized, at the same time, metal chips produced during polishing can be collected in a centralized way to avoid splashing, subsequent cleaning is facilitated,and meanwhile the operating environment can be kept clean and tidy.

The invention relates to a multi-material storage container. The multi-material storage container comprises a storage tank and an interlayer arranged in the storage tank, the interior space of the storage tank is divided by the interlayer into independent spaces, and the interlayer is a hollow interlayer and is composed of baffles, wherein the inner side ends of the baffles are mutually connected,and the outer side ends of the baffles are separated and are connected with the inner side wall of the storage tank. Compared with the prior art, the multi-material storage container has the advantages that less space is occupied, the design is flexible, and safety and reliability are achieved; and the multi-material storage container can be applied to the fields of chemical engineering, food, medicine, light industry and the like.

The invention relates to a water-jet-based underwater tapping and pumping unit and relates to the field of recycling of oil spill from shipwrecks, in particular to a tapping and pumping unit for underwater residual oil chambers of shipwrecks. The water-jet-based underwater tapping and pumping unit comprises a connecting supporting mechanism, a tapping mechanism, a pumping mechanism, seals and a motor; the tapping mechanism and the pumping mechanism are mounted on the connecting supporting mechanism; the motor is mounted on the connecting supporting mechanism and is connected with the tapping mechanism so as to drive the same to rotate to carry out tapping; the tapping mechanism and the connecting supporting mechanism are sealed via the seal; the pumping mechanism and the connecting supporting mechanism are sealed via the seal; the connecting supporting mechanism is connected with a shipwreck to be pumped. The water-jet-based underwater tapping and pumping unit has the advantages of novel structure, good processing simplicity, excellent cutting quality, good applicability, wide cutting range, good cleanliness and environmental friendliness and the like; therefore, the water-jet-based underwater tapping and pumping unit is a novel water-jet-based underwater tapping and pumping unit having both good economy and practicality.

The invention relates to outer hood cutting equipment for a glass epoxy antenna. The equipment comprises a cutting base which is provided with a lateral fixing rod and a vertical fixing rod in a fit manner, wherein a working platform elevating mechanism is arranged on the lateral fixing rod and the vertical fixing rod in a fit manner, a working platform is arranged on the lateral fixing rod, and the working platform and the lateral fixing rod are arranged in a fit manner through a lateral displacement mechanism which is arranged in a direction of front to back; a left cutting mechanism and a right cutting mechanism which are arranged on the same lateral height are respectively arranged on the left side and the right side of the cutting base; an upper cutting mechanism and a lower cutting mechanism are correspondingly arranged at the top and the lower part of the cutting base; the working platform elevating mechanism, the lateral displacement mechanism, the left cutting mechanism, the right cutting mechanism, the upper cutting mechanism and the lower cutting mechanism are connected to a control mechanism. Through the adoption of the cutting equipment disclosed by the invention, the production and processing cycle of the outer hood of the glass epoxy antenna is shortened, the working efficiency is improved, the precision of products is improved, the probability that when an operator cuts the burrs of glass-reinforced plastics, particles are sucked in the body of the operator is reduced, the human body of the operator is guanrateed to be healthy, and the operating environment is clean and environmental-friendly.

The invention discloses a visible cover on spinning frame head of ring throstle, arranging a transparent side cover plates on each of the two sides of an engine frame, arranging a transparent end cover plate on the end surface of the engine frame, arranging a transparent top cover plate over the engine frame, where the outer edges of the transparent top cover plate are joined with the transparent side cover plates and end cover plate. The mentioned cover plates are all made of transparent materials. Thus, the intruding of flying cotton and floating dust and the splashing and overflowing of lubricant are prevented effectively and it is able to extremely observe the running and lubricating situation of engine driving equipment, effectively ensuring the smooth running and good lubricating of engine driving system of a spinner.

The invention discloses a device for an electroplating experiment. The device comprises a beaker for containing electroplating liquid, an electric heating panel for heating and preserving heat for the beaker, electrode plates inserted in the electroplating liquid, and a DC voltage stabilized and current stabilized power source connected with the electrode plates through a guide line, wherein the electric heating panel is covered with a convex shield; the inner sides of the shoulder parts of the shield are placed on four edges of the electric heating panel; two to four beaker holes are formed in the top surface of the shield; the beaker penetrates through the beaker holes to be placed on the electric heating panel; four or eight hollow columns are symmetrically arranged on the outer side faces of the shoulder parts of the shield; the upper end of each hollow column is plugged with a heat insulating plug; four heat insulating plugs form a support group to fixedly support a pair of mesh enclosures; the guide line for connecting the electrode plates and the DC voltage stabilized and current stabilized power source is a grid mesh penetrating through the mesh enclosures. The device can ensure that the electroplating experiment is carried out in a safe and smooth manner, prolongs the service life of the electric heating panel, and increases the recycling times of the beaker.

The invention discloses an investment pattern and boom assembling device which comprises a bracket, a rotating shaft, a speed reducer and an electrical control system, wherein the bracket is a frame-type element and comprises a top plate at the upper part and a middle flat plate in the middle; the rotating shaft is vertically supported on the top plate and can rotate around the central axis of the rotating shaft, an opening groove with an opening facing up is formed in the upper end of the rotating shaft, and the lower end of the rotating shaft penetrates through the lower end surface of the top plate; the speed reducer is fixedly connected with the lower end surface of the middle flat plate, and the output shaft of the speed reducer penetrates upwards through the middle flat plate, is coaxially connected with the lower end of the rotating shaft and can drive the rotating shaft to rotate; the investment pattern and boom assembling device is further improved in that the output shaft of the speed reducer is connected with the lower end of the rotating shaft through a clutch; the clutch comprises an upper clutch and a lower clutch; the upper clutch is fixedly connected with the lower end of the rotating shaft; the output shaft of the speed reducer is sleeved with the lower clutch, and the lower clutch can slide up and down along the output shaft of the speed reducer and be driven by the output shaft of the speed reducer to rotate; the lower clutch is controlled by a lower clutch control mechanism. The investment pattern and boom assembling device is simple and fast to operate, high in assembly efficiency and low in labor intensity of workers.

The invention discloses an investment pattern and boom assembling device which comprises a bracket, a rotating shaft, a speed reducer and an electrical control system, wherein the bracket is a frame-type element and comprises a top plate at the upper part and a middle flat plate in the middle; the rotating shaft is vertically supported on the top plate and can rotate around the central axis of the rotating shaft, an opening groove with an opening facing up is formed in the upper end of the rotating shaft, and the lower end of the rotating shaft penetrates through the lower end surface of the top plate; the speed reducer is fixedly connected with the lower end surface of the middle flat plate, and the output shaft of the speed reducer penetrates upwards through the middle flat plate, is coaxially connected with the lower end of the rotating shaft and can drive the rotating shaft to rotate; the investment pattern and boom assembling device is further improved in that the output shaft of the speed reducer is connected with the lower end of the rotating shaft through a clutch; the clutch comprises an upper clutch and a lower clutch; the upper clutch is fixedly connected with the lower end of the rotating shaft; the output shaft of the speed reducer is sleeved with the lower clutch, and the lower clutch can slide up and down along the output shaft of the speed reducer and be driven by the output shaft of the speed reducer to rotate; the lower clutch is controlled by a lower clutch control mechanism. The investment pattern and boom assembling device is simple and fast to operate, high in assembly efficiency and low in labor intensity of workers.

The invention discloses a stacking device for bagged cement processing, belonging to the technical field of bagged cement stacking, a processing platform and a stacking device. The processing platform is placed horizontally on the ground, and the stacking device is arranged in the processing On the top of the platform, the stacking device includes a blanking component, a conveying component, a leveling component, a dust-proof box cover, a transport belt and a palletizing frame, the dust-proof box cover is fixedly arranged on the top of the processing platform, and the lower The material component is arranged on the top of the processing platform, the conveying component is arranged on the top of the processing platform, the conveying belt is arranged on the unloading component, the leveling component is arranged on the unloading component, and the stacking frame is arranged on the processing platform. the top of. In the present invention, when the bagged cement is transported and moved by the stacking device, the dust on the outer surface of the bagged cement can be shaken off, so that when the bagged cement is stacked, the dust will not be scattered, and the surface of the bagged cement will not be scattered. The dust is isolated in the dust box cover.

The invention relates to a method for treating complex gold concentrate cyanidation tailings through microwave chloridizing roasting and volatilization. The method comprises the following steps: feeding a complex gold concentrate cyanide tailing mixture containing a chlorinating agent into a disk granulator, so as to obtain green pellets; sending the green pellets into an industrial microwave oven, setting certain temperature and time, and carrying out drying, preheating and roasting volatilization in sequence, so as to obtain volatilized flue gas and hot pellets, wherein the obtained flue gas contains valuable metals such as gold, silver and copper; leading the flue gas into a wet process recovery system via a draught fan for recovery; and sending the hot pellets into a pellet storage yard for sale after cooling. According to the method, the grade of gold in the tailings can be substantially lowered, the operation is easy and the technological process is short, the reaction temperature and time are reduced, and the subsequent treatment of the valuable metals such as gold in the discharged flue gas is relatively easy, and the production efficiency is improved.

The invention discloses an energy-saving and environment-friendly inner wall self-recognition spraying robot for building decoration, which comprises a separation body hole self-recognition spraying mechanism, a pre-polishing spray storage and circulation mechanism, a lifting mechanism and a movable material preparation mechanism, and the lifting mechanism is arranged on the upper wall of the movable material preparation mechanism; the separation body hole self-recognition type spraying mechanism is arranged on the upper wall of the lifting mechanism, and the pre-polishing spray storage and circulation mechanism is arranged on the side wall of the separation body hole self-recognition type spraying mechanism. The invention belongs to the technical field of building decoration, and particularly provides an energy-saving and environment-friendly interior wall self-recognition spraying robot for building decoration, which applies a segmentation principle and a feedback principle to spraying of a wall surface and recognition of door and window holes, and solves the technical problem that doors and windows are easy to pollute when the wall surface is sprayed. The pre-acting principle and the Bernoulli principle are applied to pre-polishing of the wall surface and collection of paint mist, the dust amount in the wall surface spraying process is reduced, the material recycling rate is increased, and energy-saving and environment-friendly spraying is achieved.

A protection device in a side position structure for a dovetail mortising machine comprises a frame body (1). The frame body (1) is fixed to the outer side of the dovetail mortising machine through aconnection support (2) and comprises a through hollow type protection cover device (3), a longitudinal spacing adjuster (4), sliding guide rails (5) and a drawer type collection device (6). When the protection device is used, the moving direction of the frame body (1) is adjusted according to the thickness of a wood piece and the positioning size, so that waste chips generated in the dovetail mortising process is blocked and collected. A prompting device (7) is arranged and gives out a corresponding prompt when the frame body (1) is in an adjusting state. The collection device (6) horizontallypenetrates through a base of the mortising machine and is replaced through a push-pull handle (8). The stereo type structural design is achieved, the waste impact chips are blocked out of a body, andthe safety and stability of the operation process are guaranteed; and meanwhile the protection device can be adjusted flexibly aiming at the size of an object, and cleanliness of the operation environment is guaranteed.

The invention relates to a synthesis method of diisopropyl azodiformate, comprising the following steps of: adding diamine diisopropyl dicarboxylic acid and water in sequence under the temperature of 15 DEG C below zero to 40 DEG C, slowly adding 10 to 70 percent sulfuric acid solution, adding bromide as catalyst, and slowing dripping hydrogen peroxide, wherein the mol ratio between the hydrogen peroxide and the diamine diisopropyl dicarboxylic acid is 1.0 to 2.5: 1; controlling the dripping speed and dripping off within 0.5 to 2 hours, preserving the temperature for 1 to 10 hours after the dripping is over, extracting reaction mixture by solvent, drying after oil-phase washing, and distilling to eliminate the solvent to prepare the claret diisopropyl azodiformate. The invention has the advantages that: mild oxidant hydrogen peroxide is selected as oxidant, the oxidant cost is low, no residual impurities exist after reaction, and the product purity is high. The invention has the advantages of simple operation, clean operation environment, recycled extracting solution, wide reaction temperature range and stable reaction; and the prepared product is unnecessary to further refine so that low energy consumption and high production ratio are ensured.