66results about How to "Easy to get materials" patented technology

The invention relates to the technical field of biodegradable materials, and particularly discloses a BBM-added bamboo powder biodegradable material and application thereof in beer bottles. The BBM-added bamboo powder biodegradable material is prepared from the following raw materials in parts by mass: 10 to 20 parts of poly (butylene succinate), 10 to 30 parts of poly (butylene adipate-co-terephthalate), 10 to 20 parts of bamboo powder, 1 to 3 parts of dopamine hydrochloride, 0.1 to 0.5 part of n-butylamine, 1 to 2 parts of hexadecyl trimethyl ammonium bromide, 1 to 5 parts of tetraethyl orthosilicate and 1 to 2 parts of tetrabutyl titanate. 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of an antioxidant and 1-2 parts of a plasticizer. The BBM obtained by the invention has excellent mechanical properties, improves the anti-ultraviolet intensity of a degradable material to a certain extent, and has very good biodegradability.

The utility model provides a traditional Chinese medicine retention enema device for an enterostomy patient, and belongs to the technical field of medical instruments. The device comprises a liquid filling assembly and an antifouling assembly, the liquid filling assembly comprises an enema bag and an infusion tube, and the infusion tube is provided with a Murphy dropper and a flow regulator; the anti-fouling assembly comprises an ostomy bag, and the ostomy bag comprises a bag body and a base plate. A through hole is formed in the chassis; a mounting hole is formed in the bag body, and a sealing piece is arranged in the mounting hole in a matched mode. An insertion channel used for inserting an infusion tube is arranged in the sealing piece, and the tail end of the infusion tube enters the enterostomy through the insertion channel. The infusion tube is further sleeved with a flexible tube, one end of the flexible tube penetrates through the insertion channel of the sealing piece and extends into the enterostomy, and the other end of the flexible tube is arranged outside the sealing piece. And the other side of the fixed pressure plate is also connected with a chock plug. The device is simple to operate and convenient and quick to use; the ostomy bag is clean and transparent, and ostomy conditions are easy to observe; discharge is all in the ostomy bag, peculiar smell is small, pollution is avoided, and the comfort level of a patient is improved.

The utility model discloses a stirrup bending tool which comprises a wrench and a main reinforcement sleeve. The main reinforcement sleeve is of a hollow cylindrical structure with an opening in one side, and the main reinforcement sleeve can be coaxially connected to the main reinforcement in a sleeving mode through the opening. Stirrup grooves of U-shaped structures are formed in the edges of the two sides of the opening, the stirrup is wound around the main reinforcement, the stirrup penetrates through the two stirrup grooves, and the stirrup can abut against the ends, away from the opening, of the stirrup grooves; the wrench is of a long-strip-shaped structure, and one end of the wrench is fixedly connected with the other side, away from the opening, of the main rib sleeve. The utility model relates to the technical field of reinforcing steel bar machining tools, and can solve the problem that in the prior art, a binding tool is poor in stirrup bending machining quality.

The invention belongs to the technical field of plant genetic engineering, and particularly relates to a genetic transformation method of perennial elymus nutans. According to the genetic transformation method of elymus nutans, mature embryos serve as explants for inducing callus formation, the method has the advantages that material obtaining is convenient, operation is simple and easy, the supply problem of explant material obtaining is solved, and meanwhile the physiological state of the mature embryos is consistent, so that the repeatability of experiments is good; in addition, the infection liquid contains the acetosyringone, and the acetosyringone (AS, Acetosyringone) can promote the growth of agrobacterium tumefaciens and enhance the activity of the agrobacterium tumefaciens, so that the conversion efficiency is improved; the browning phenomenon of the calluses is effectively inhibited through sterilization treatment, the normal growth of the calluses can be recovered, the transgenic elymus nutans plants are obtained through the technical scheme, and the research of researchers on the gene functions of the elymus nutans can be greatly promoted.

The utility model relates to a prefabricated column hoisting installation auxiliary device which comprises a lower-layer frame and an upper-layer frame, the lower-layer frame and the upper-layer frame are fixedly connected through four pieces of vertical angle steel, the lower-layer frame, the upper-layer frame and the four pieces of vertical angle steel are connected to form a frame barrel-shaped structure, and the caliber of the frame barrel-shaped structure is consistent with the size of a prefabricated column. A big-end-up cup opening frame is fixed to the top of the upper-layer frame, the upper portion of the cup opening frame is larger than the prefabricated column, levers are installed on the periphery of the cup opening frame, and idler wheels are arranged at the bottoms of the levers. When the auxiliary device is used, the device is positioned and placed according to a cup opening hole in the top of a cup opening foundation, the caliber position of the cylindrical structure of the frame is located in the center of the cup opening hole, the prefabricated column is aligned with the caliber of the upper-layer frame through the levers on the periphery, and then the prefabricated column continues to be put down; the prefabricated column is placed in the cup opening hole along the cylindrical structure of the frame, so that the prefabricated column is placed in the center of the cup opening hole, positioning is accurate, and operation is easy.

The present invention discloses a chip conveyor rear shaft, including a support shaft and guide wheel assemblies respectively arranged at both ends of the support shaft, the guide wheel assembly including a guide wheel and a fixed seat, the fixed seat being installed on the chip conveyor housing, the guide wheel being arranged between the fixed seat and the support shaft, the inner end surface of the fixed seat being provided with a positioning boss for positioning the guide wheel, the outer end surface of the guide wheel being provided with a positioning groove engaged with the positioning boss, the guide wheel being hollow inside, the support shaft being provided with an installation window for connecting the support shaft with the guide wheel assembly, and the support shaft being connected to the fixed seat. The rear shaft assembly of the present invention adopts a segmented detachable structure, which has a simple structure, is easy to maintain, and has a low maintenance cost, and is not limited by space for installation and disassembly, and the guide wheel can be installed and disassembled conveniently and quickly in a limited installation space, and is easy to replace, thereby improving the disassembly efficiency of the chip conveyor rear shaft, thereby improving the production efficiency of the chip conveyor.

The utility model relates to a welding wire roller transfer trolley which comprises a frame body, a handrail arranged on one side of the frame body, universal wheels fixed to the bottom of the frame body, a left placing area and a right placing area arranged on the frame body, each placing area comprises an upper placing frame and a lower placing frame, each placing frame comprises two limiting rods arranged at intervals, and the interval between the limiting rods is smaller than the outer diameter of a welding wire roller. The limiting rods are arranged on the frame body so that a welding wire roller can be placed between the limiting rods, upward protrusions of the angle steel can stop the welding wire roller from rolling from the two sides, and therefore the welding wire roller can be stably clamped between the limiting rods, the lower-layer containing frame is fixedly connected to the bottom of the frame body, and the upper-layer containing frame is arranged on the frame body in a sliding mode so that the height of the upper-layer containing frame can be adjusted on the frame body in a sliding mode. When a welding wire roller is placed on the lower-layer placing frame, the height of the upper-layer placing frame is adjusted upwards, the side space of the frame body is reserved, and therefore the welding wire roller can be assembled and disassembled more conveniently, and after the welding wire roller is assembled, the height of the upper-layer placing frame is adjusted downwards, and the welding wire roller on the lower layer is limited between the upper-layer limiting rod and the lower-layer limiting rod.

This invention discloses a pipeline gas supply device, a pipeline gas filling method, and a pipeline welding method, relating to the field of welding tool technology. The pipeline gas supply device includes a gas supply pipe, which comprises a hollow gas supply pipe body and a sealing plate located at one end of the gas supply pipe body, with the other end of the gas supply pipe being the gas supply end; a sealing sleeve fitted around the outer circumference of the gas supply pipe; two fixing washers, located at opposite ends of the sealing sleeve; a pushing component located at the gas supply end of the gas supply pipe; and an expansion / contraction component. The pushing component moves towards the sealing plate end of the gas supply pipe, causing the expansion / contraction component to be squeezed by the fixing washers and the sealing plate or the pushing component, achieving a pipeline sealing effect. This device limits the gas filling range of the protective gas to between the two expansion / contraction washers, greatly reducing the amount of gas used for welding, preventing free discharge of the protective gas, enabling quantitative use of the protective gas, and reducing waste. It is applicable to the gas filling of welded bends, long pipes, and irregularly shaped pipelines.

The utility model discloses a kind of turnover strip-shaped concrete reverse ridge template fixing devices, belong to building construction equipment technical field, including handle, the handle below is provided with connecting sleeve, the connecting sleeve both sides are connected with one root horizontal support rod respectively, connecting sleeve with The horizontal support rod is connected through thread between the two, the horizontal support rod is connected with two oblique support rods away from connecting sleeve end, and the oblique support rod between same side is connected with longitudinal support rod.The utility model uses above-mentioned one kind of turnover strip-shaped concrete reverse ridge template fixing device, by the welding assembly of several support rods, cooperate sleeve and handle, the convenient material taking and quick production of fixed device production are realized, improve work efficiency, save construction cost.

This application relates to a drip irrigation curing bucket fixing frame for a bridge pier bearing pad, comprising: a frame body; a base installed at the bottom of the frame body; and a fixing assembly including a sleeve, a clamping block, a movable rod, and a limiting member. The sleeve is installed on the side of the base away from the frame body and is inserted into the anchor bolt hole of the bearing pad. The sleeve has a through hole in its wall, and the clamping block is movably installed in the through hole along the radial direction of the sleeve. The movable rod has a first part and a second part arranged along the axial direction, the diameter of the first part being larger than the diameter of the second part. The movable rod is movably inserted into the sleeve along the axial direction, so that when the movable rod moves, it switches between the first part and the second part abutting against the clamping block. The limiting member is installed on the sleeve to limit the position of the movable rod. This utility model can switch between the fixed and relaxed states of the fixing frame without damaging the structure of the bearing pad itself.

The invention provides a kit and a method for evaluating and / or predicting skeletal development conditions. The kit comprises a reagent for detecting the sulfate content, and the sulfate content serves as a biomarker of the skeletal development condition. The sulfate content is used as the biomarker for evaluating and / or predicting the skeletal development condition, and the biomarker has the advantages of high sensitivity, high specificity, low detection cost, convenience in material taking, easiness in sample storage and the like, can be widely applied to related work such as health examination and disease general survey, and becomes an effective means for growth and development evaluation and auxiliary disease diagnosis. Moreover, the biomarker disclosed by the invention has the characteristics that the smaller the age (before adolescence) is, the higher the correlation is, so that the higher the sensitivity is, which means that the biomarker disclosed by the invention can be used for effectively evaluating and / or predicting the skeletal development condition, and identifying and intervening diseases earlier, and is more likely to improve the final height of a patient with short stature.

The present invention discloses a periodically arranged seismic isolation super-foundation device based on concrete-rubber interlayers. The super-foundation is composed of two parts. First, there are interlayers of concrete and rubber. Second, there are periodically arranged unit cell structures in the concrete layer to form a bandgap. It is intended to construct the super-foundation device from two aspects for seismic isolation of the structure. When an earthquake occurs, first, the super-concrete material shakes under the action of seismic inertia, and the collision between the steel balls in the unit cell and the concrete wall and between the steel balls consumes part of the energy. Second, the periodically arranged unit cells exert a bandgap effect to suppress part of the seismic energy from being transferred to the foundation and structure. Finally, the interlayers of concrete and rubber cause shear deformation of the foundation, which can ensure that the upper structure moves horizontally, thereby avoiding bending damage.

The invention discloses a phosphate tailing and biomass composite soil conditioner and a preparation method thereof.In the preparation process, firstly, phosphate tailings are air-dried and sieved to obtain a phosphate tailing material, then agricultural waste is dried, smashed and sieved to obtain an agricultural waste material, biomass is subjected to anaerobic pyrolysis and then sieved to obtain a biochar material, and the biochar material is subjected to anaerobic pyrolysis and then sieved to obtain the phosphate tailing and biomass composite soil conditioner. And mixing the phosphate tailing material, the biochar material and the agricultural waste material in proportion, and performing microwave irradiation modification to obtain the composite soil conditioner. Phosphorus tailings are compounded with agricultural wastes such as straws, the agricultural wastes are modified by adopting an irradiation technology, the compound conditioner is developed, the toxicity of heavy metals in soil can be effectively reduced, the problems of deterioration of physical and chemical properties of soil in a metal mine area, poor soil structure, low soil biodiversity and the like are solved, and the survival rate of plants is increased.

The utility model relates to the field of leveling of veneers, in particular to a three-in-one appliance for leveling, sagging and positioning steps of veneers, which comprises a bent vertical short rod, a transverse long rod, a middle long rod, a horizontal bubble instrument and an adjusting knob. The two sets of bent vertical short rods are arranged in parallel, the two sets of transverse long rods are arranged between the two bent vertical short rods in parallel, the middle long rod is arranged between the two transverse long rods, and the two ends of the transverse long rods and the two ends of the middle long rod are perpendicularly connected with the bent vertical short rods on the two sides. The horizontal bubble instrument is horizontally fixed on the upper surface of the middle long rod; and the adjusting knob is arranged on the bent vertical short rod. According to the utility model, the functions of paving, plumb finding and positioning are integrated. The veneer leveling device is mainly applied to the field of veneer leveling.

The embodiment of the present application discloses a feeding method for improving the survival rate and weight of Polyphylla laticornis larvae in the process of processing and converting fungus dungs. The feeding method comprises the following steps: S1: obtaining the feces generated in the feeding process of 2nd instar and / or 3rd instar Polyphylla laticornis larvae; S2: obtaining the feces substrate formed by the feces; S3: putting the 2nd instar Polyphylla laticornis larvae into the feces substrate, and placing them in an environment with a temperature of 28±2 DEG C and a light cycle of L:D = 16h:8h for feeding for 10 days, and the substrate humidity is controlled at 50%-55%; S4: picking or screening the larvae fed for 10 days from the feces substrate, and putting them into fungus dung substrate for further feeding. The present application can improve the survival rate and weight of Polyphylla laticornis larvae in the process of processing and converting fungus dungs, improve the utilization rate of insect feces, simplify the pretreatment process of fungus dungs, and reduce the feeding cost. The feeding method is simple and feasible, convenient to obtain materials, and has a great promoting effect on the processing and converting fungus dungs industry of Polyphylla laticornis.

The utility model discloses an assembly type steel structure building ALC inner wallboard installation device which comprises a steel pipe supporting frame, a winch and a pulley. A winch is installed at the upper end of the inner side of the steel pipe supporting frame, a fixed pulley is arranged at the top of the supporting frame, a rubber pad is connected to the bottom of the outer side of the supporting frame to prevent collision in the hoisting process, a steel plate is welded to the first-layer transverse rod, configuration is arranged on the steel plate, and meanwhile four universal wheels with brakes are arranged at the four corners of the bottom of the steel pipe supporting frame. Compared with an existing common wallboard installation device, the assembly type building ALC inner wallboard installation device has the advantages of being convenient and rapid in material obtaining, safe, efficient, high in stability, capable of being operated by a single person and the like, meanwhile, the device can be moved conveniently through the universal wheels with brakes, and safety of the device and personnel is kept in the using process.

The present invention provides a culture medium for oyster mushroom and a method for cultivating oyster mushroom, and relates to the technical field of cultivation of edible fungi. The present invention first provides a culture medium for oyster mushroom, wherein the raw materials of the culture medium for oyster mushroom include dry materials, wherein, based on the total weight of the dry materials of the culture medium for oyster mushroom as 100%, the dry materials include the following raw material components: 10-40% applewood, 5-20% beet pulp, 20-60% corn cobs, 10-20% wheat straw, 3-10% soybean meal, 5-15% bran, 2-8% cornmeal, 0.5-2% gypsum, 0.5-2% lime, 0.1-0.5% magnesium salt, 0.1-0.5% phenylalanine, and 0.1-0.5% soy protein. Cultivation using the culture medium for oyster mushroom provided by the present invention can significantly improve the yield of the first two waves of oyster mushroom, and the bioconversion rate of the first two waves is high.

The utility model discloses a modularized airplane external equipment storage and transportation device, which belongs to the field of airplane equipment storage, is used for storing and transporting external equipment, related accessories and the like, adopts a modularized design, can adjust the inside of a square cabin, is an all-hollow square cabin when all internal structural parts are dismantled, and can be used for storing and transporting the external equipment by adjusting internal functional modules. The container can meet the storage and transfer functions of external equipment of a certain type of aircrafts, can contain two-stage external equipment and accessories of two aircrafts when independently containing the external equipment, can be used in cooperation with a loading and unloading platform of a large transporter to be rapidly hoisted to a certain large transporter, and can take land transportation and sea transportation into consideration. The dehumidification interface of the air-conditioned vehicle is reserved, is in a closed state at ordinary times, is opened and connected with the air-conditioned vehicle to dehumidify during use, and is pulled out of a cabin to directly move onto a trailer when being matched with a trailer system for use, so that the operation is convenient and fast.

This utility model relates to a device for disassembling and replacing carbon dioxide cylinders, including a pry bar. A notch is provided at the upper front end of the pry bar for embedding a crossbar of a hanging bracket fixed to the top of the carbon dioxide cylinder. A lifting rod is hinged to the rear side of the notch on the pry bar, and a hook is provided at the upper end of the lifting rod for hooking onto the suspension beam of the carbon dioxide cylinder. This device facilitates lifting the carbon dioxide cylinder, making subsequent disassembly and replacement easier.

The present application relates to the technical field of curtain wall construction, and particularly relates to a curtain wall transfer floor vertical keel elevation fine adjustment device and a construction method. The present application comprises a fixing assembly, an adjusting assembly and a receiving assembly, the fixing assembly and the receiving assembly are respectively arranged at two ends of the fixing assembly, the fixing assembly is clamped on a building ring beam, the adjusting assembly and the receiving assembly are arranged on the outer surface of the building, a fine adjustment bolt is arranged on the fixing assembly, the fine adjustment bolt vertically contacts the top of the ring beam and is threadedly connected with the fixing assembly. The fixing assembly is used for fixing on the building structure, conveniently temporarily fixing the vertical keel, the adjusting assembly enables the present application to be applicable to the installation of vertical keels of various specifications, the receiving assembly is used for supporting the keel, conveniently installing the vertical keel, the fine adjustment bolt is used for finely adjusting the vertical installation position of the vertical keel, improving the keel installation precision, effectively reducing the alignment operation time in the basket during keel installation, and reducing the construction difficulty.

The utility model relates to a finished yarn stacking positioning structure and finished yarn stacker packaging structure, wherein the finished yarn stacking positioning structure is characterized by comprising thin plate material and a plurality of plastic positioning discs arranged on the surface of at least one side of the thin plate material, the plastic positioning disc comprises a pipe body for positioning the inner peripheral wall of the finished yarn core tube and being conical and a bottom plate integrally formed at the lower end of the pipe body, and the center part of the bottom plate is locked and connected with the thin plate material through bolts. The finished yarn stacking positioning structure is rationally designed and is favorable for reducing the manufacturing cost and manufacturing period.

The invention provides an electromechanical pipeline construction carrying trolley which is used for carrying a single pipeline or multiple pipelines, a driving trolley and a follow-up trolley are combined for use, an electric system of the driving trolley serves as a trolley head, the follow-up trolley is not powered to serve as a following trolley, and the driving trolley and the follow-up trolley are combined for use. Middle connection depends on the electromechanical pipeline body, and the transportation capacity is greatly improved. The driving trolley and the follow-up trolley are small in size, the pipe can be dragged to be carried in the building channel, and the capacity of adapting to the building construction environment is high. The vehicle body frame is convenient to manufacture, easy to manufacture, low in cost and suitable for mass production and popularization. By means of the remote control electric device, the working intensity in the pipeline carrying process is effectively improved, the pipeline construction carrying efficiency is improved, and the labor cost is saved. The crawler belt assembly is used, so that the pipeline construction carrying trolley obtains better ground gripping capacity, and the capacity of a carrying tool for adapting to complex road conditions of a construction site is effectively improved.

The invention relates to the technical field of tailing heavy metal pollution restoration and mine ecological restoration, and discloses a heavy metal tailing area pollution in-situ resistance control and efficient biological coverage restoration method which is an ecological restoration technology integrating solidification / stabilization restoration, barrier landfill and vegetation restoration. The method can solve the problem of simultaneous treatment of heavy metal polluted soil ecological restoration, mine pollution restoration and obstruction, can be used for restoration and ecological restoration of different heavy metal polluted soil and waste residue sites, and especially has a good effect on heavy metal restoration and ecological restoration of mine and smelting polluted sites.

The utility model relates to a bridge transverse damper with resetting and grading energy consumption functions, which particularly comprises a beam bottom connecting plate, a limiting baffle, a beam bottom connecting plate bolt, a pier top connecting plate bolt, a steel rod right end nut, a steel rod left end nut, a steel rod, an SMA disc spring group, a triangular steel plate and a pier top connecting plate. The triangular steel plate is connected with the pier top connecting plate, a round hole is formed in the upper portion of the triangular steel plate, the limiting baffles are connected with the beam bottom connecting plate, the limiting baffles are provided with horizontal guide grooves, the SMA disc spring groups are arranged between the adjacent limiting baffles and the triangular steel plate, and the steel rod sequentially penetrates through the guide grooves of the limiting baffles, the SMA disc spring groups and the round hole in the upper portion of the triangular steel plate. And the steel rod right-end nut and the steel rod left-end nut are screwed at the thread tooth opening at the end part of the steel rod, so that the bridge transverse damper with resetting and graded energy consumption functions is formed. Under frequent earthquakes, the SMA disc spring group is used for providing energy dissipation and reset capacity, and under rare earthquakes, the triangular steel plates generate plastic deformation to dissipate earthquake energy.

The utility model discloses a mounting structure for assisting in hidden mounting of a pipe clamp and a light partition wall. The hidden installation pipe clamp comprises a connecting plate, an anchoring pipe located at one end is erected on the plate face of the connecting plate, an inserting seam is formed in the other end of the connecting plate and penetrates through the two plate faces, and a notch of the inserting seam faces the end. The installation structure comprises a building main body and a light partition wall, and further comprises the auxiliary hidden installation pipe clamp, the anchoring pipe is anchored on the light partition wall, the anchoring part is anchored on the building main body, and the anchoring part is located in the inserting seam. The connecting structure has the advantages that the problems that when the upper portion of an ALC light partition wall body is a beam or the lower portion of the ALC light partition wall body is provided with a reverse ridge and the wall thickness is the same as the beam / reverse ridge width, a first plate pipe clamp can be normally installed in the installation process, however, a second plate is connected with the first plate, a third plate of the same kind is connected with the second plate, and in the same way, conventional pipe clamps cannot be adopted for installation at corresponding positions are solved; and the quality risks that the iron piece is exposed and is easy to rust, and later decoration is easy to crack due to installation of a U-shaped clamp are avoided.

The invention provides a simple piling device and method. The device comprises a main arm frame, an auxiliary arm frame, a rocker arm frame, a hammer body and a rocker arm oil cylinder. The auxiliary arm frame is connected with the main arm frame and can be fixed relative to the main arm frame; the hammer body is arranged on the side face of the auxiliary arm frame in a sliding mode. One end of the rocker arm frame is hinged to the main arm frame, and the other end of the rocker arm frame is connected with the hammer body through a traction rope; one end of the rocker arm oil cylinder is rotationally connected with the main arm frame, and the other end is rotationally connected with the rocker arm frame; the rocker arm oil cylinder stretches out and draws back to drive the rocker arm frame to rotate relative to the main arm frame so as to drive the hammer body to reciprocate through the traction rope. The device is simple in structure and can be directly arranged on engineering machinery, the auxiliary arm frame and the main arm frame are relatively fixed, the rocker arm oil cylinder stretches out and draws back to drive the rocker arm frame to rotate relative to the main arm frame, and the rocker arm frame can swing back and forth around the hinge point of the rocker arm frame and the main arm frame, so that the hammer body is driven to reciprocate up and down, and the piling action is performed.

This utility model discloses a gas drainage branch pipe anti-blocking and unblocking pipeline in weakly cemented coal mines, relating to the field of safe production in weakly cemented coal mines. This pipeline includes an independent borehole unblocking pipe and a tubular connecting device built into a sealing pipe and a screen pipe. The tubular connecting device connects the unblocking pipe to the external environment. The borehole unblocking pipe components include the unblocking pipe and the unblocking pipe interface. The borehole unblocking pipe is composed of a screen pipe, a sealing bag, a PVC hose, and a metal connector. Different diameters and lengths of hose can be selected according to drilling requirements. The metal connector has annular indentations to ensure a tight seal. The connecting device consists of three parts: a connecting pipe, a probe, and a ball valve. This device is quick and easy to install and can monitor the borehole flow rate and compare the gas concentration inside and outside the borehole during operation, analyzing whether the borehole leakage is due to leakage, blockage, or natural attenuation, in order to take targeted preventative measures.

The utility model relates to a mounting structure of a proximity switch for positioning and stopping a rotary drum, which belongs to the field of mounting of proximity switches and comprises a rotary drum main shaft, a shaft head plastic plate disc is detachably mounted at a shaft head position of the rotary drum main shaft through a bolt, and a plastic support is detachably mounted on the rotary drum main shaft through a bolt. The interior of the plastic support is provided with an installation long groove, and the interior of the installation long groove is provided with a proximity switch body. According to the mounting structure of the proximity switch for positioning and stopping the rotary drum, the shaft head plastic plate disc is mounted on the shaft head of the rotary drum main shaft through the bolts, and the plastic bracket is mounted at the idle position of the rotary drum main shaft through the bolts, so that the proximity switch body can be mounted in the mounting long groove according to actual requirements; and then the small screw is mounted on the shaft head plastic plate disc, so that the small screw corresponds to the proximity switch body to finish mounting, and the mounting mode is convenient in material taking, convenient in mounting, economical and applicable.