69results about How to "Suitable for mass promotion" patented technology

The invention relates to a Taxus media rapid cutting propagation cultivation method, belonging to the field of asexual quick propagation technologies of plants. The rapid cutting propagation cultivation of Taxus media is realized through steps of branch pruning, proportioning of alcohol and 1-naphthylacetic acid and then mixing with water, soaking in soaking solution for 1-3 seconds after putting cuttings into the soaking solution, cutting, management, fertilization and transplantation. The Taxus media rapid cutting propagation cultivation method has the advantages that the time of soaking in nutrient solution is short, not only can the labor, the time and the cost be saved, but also the original variety nature and the inner quality of the Taxus media can be maintained to the utmost extent, the method is more economic propagation method, the survival rate of Taxus media branches can reach more than 98 percent and the method can be widely popularized.

The invention provides a positioning, navigating and locus plotting apparatus. The positioning, navigating and locus plotting apparatus comprises a shell and a human-machine interface arranged on the surface of the shell, and also comprises a CPU mainboard arranged in the shell, and an accelerometer, a gyroscope, an atmospheric pressure altimeter, an electron compass, a satellite signal reception module, a wireless transmit-receive module and sensing module interfaces for the switch-in of a gas sensor and an apparatus identifying module, which are connected with the CPU mainboard and are also arranged in the shell. The apparatus has a simple structure and a low price, can be used for ground positioning, navigating and locus plotting, can also be used for the positioning, navigating and locus plotting of places having no satellite signals and comprising mines, underground pipe networks and the like, can determine whether crossed mine mining is carried out or not in real time, and is a timely and effective crossing monitoring tool for mining industry resource monitoring departments, can be used for drawing a mine toxic gas distribution map and a mine apparatus distribution map, has the advantages of small size, light weight portability, use convenience, and no need of processional technologies and knowledge of users, and is suitable for large batch popularization.

Amino acid microbial organic fertilizer is prepared through steps as follows: preparation of a compound amino acid aqueous solution, preparation of biogas residues, preparation of fermentation powder, preparation of organic compost, preparation of a microbial agent, preparation of the amino acid microbial organic fertilizer and the like. The amino acid microbial organic fertilizer has the benefits that pure plant rhizomes are adopted as raw materials for production of amino acid and are easier to absorb as fertilizer, the biogas residues are adopted as carriers of the amino acid and microbes, organic fertilizer can be provided while the amino acid is provided, the survival rate of the microbes can also be increased, and the effectiveness of the amino acid and the living environment of the microbes are also guaranteed due to the low-temperature production process; the quality of the organic fertilizer prepared with the method can be guaranteed, the yield of crops is effectively increased, the quality of the crops is effectively improved, the soil structure is improved, the soil fertility is improved, and the organic fertilizer is suitable for large-scale popularization.

The invention relates to a dynamic dummy load with a simple structure. The dynamic dummy load with the simple structure comprises a voltage sampling unit, a control unit, a dummy load body and a control switch, wherein the voltage sampling unit is used for collecting output voltage; the control unit is used for comparing output voltage and threshold value voltage and driving the control switch to be switched on and off; if the output voltage exceeds the threshold value voltage, the control switch is driven to be switched on, the dummy load is connected to the output voltage in parallel, and the dummy load is connected to work; if the output voltage is lower than the threshold value voltage, the control switch is switched off, and the dummy load body is cut off. According to the dynamic dummy load with the simple structure, which is disclosed by the invention, the output dummy load is dynamically loaded and cut off in a low-cost mode, and the dummy load loss can be effectively reduced. In addition, when the output voltage is low, the dummy load is automatically cut off, and the output voltage lowering tendency is objectively alleviated.

The invention relates to a single-core insertion fiber cold connector, wherein the chamber screw (7) is connected to the chamber nut (8) to form mounting chamber (24); the mounting chamber (24) is mounted with cold connector to form fiber cold connector; the insert needle (1) via connector (2) is connected to the positioning element to form connecting device; the locking screw (4) is connected to the locking nut (6) to form locking chamber (12); the locking chamber (12) is mounted with dual-cone clamper (5) to form locking device; the connecting device via connector (2) is mounted at one end of chamber screw (7); another end of positioning element (3) is connected to one end of locking screw (4) that the cold connector formed by connector and locking device is mounted in mounting chamber (24) to form fiber cold connector. The invention uses accurate positioning and cone clamping to realize micro feeding, reduce cost and improve connecting success.

The embodiment of the invention discloses a fabrication method of a power amplifier antenna integrated PCB and the power amplifier antenna integrated PCB. The method comprises the steps of providing aT-shaped high-frequency sub-board, a mother board with a T-shaped groove and a prepreg, wherein the prepreg is used for pasting the T-shaped high-frequency sub-board and the mother board with the T-shaped groove; respectively and correspondingly forming one or more positioning holes in a shoulder part of the T-shaped high-frequency sub-board and the mother board with the T-shaped groove; pastingthe T-shaped high-frequency sub-board to the T-shaped groove of the mother board by the prepreg, and allowing positions among the corresponding positioning holes to be aligned; inserting positioning pins into the positioning holes, aligning and fixing the T-shaped high-frequency sub-board and the mother board with the T-shaped groove, performing lamination, and forming a local mix-pressed multi-layer board; and forming and processing the local mix-pressed multi-layer board to fabricate the power amplifier antenna integrated PCB. According to the method provided by the technical scheme of the embodiment of the invention, the fabrication cost of the whole board can be greatly reduced, the favorable reliability of a product is ensured, the alignment of a high-intensive blind hole in an outerlayer and the whole board also can be ensured, and favorable welding feasibility of a PCBA is ensured.

The invention discloses an anti-corrosion steel bar for a tropical ocean atmospheric environment concrete structure and a production method thereof, and belongs to the technical field of anti-corrosion materials. The steel bar comprises the following chemical components in percentage by weight: C: 0.16-0.21%, Si: 0.35-0.65%, Mn: 0.70-1.20%, P: less than or equal to 0.030%, S: less than or equal to0.030%, Cr: 0.40-1.00%, Cu: less than or equal to 0.35, Ni: less than or equal to 0.45%; Mo: 0.10-0.20%, Ti: less than or equal to 0.025%, V: 0.030-0.050%, N: less than or equal to 0.0080%, and the balance Fe and inevitable impurities. A small amount of alloy elements are added on the basis of the carbon steel bar, and through optimization of the content and proportion of the alloy elements, thenovel steel bar with excellent corrosion resistance is obtained. The steel for the anti-corrosion steel bar meets the requirements of mechanical performance and welding performance of the tropical marine atmospheric environment concrete structure, the corrosion resistance of the steel bar is 2-4 times that of HRB400E steel bars, and the durability of the reinforced concrete structure can be effectively prolonged.

The invention relates to a P2P video security and protection monitoring platform of the 3G Internet of things. The P2P video security and protection monitoring platform comprises an IP camera, a P2P server, the Internet and a monitoring terminal, wherein the IP camera, the P2P server and the monitoring terminal are connected through the Internet, the monitoring terminal comprises a mobile phone which is connected to the Internet through the 3G network, the IP camera is connected with the monitoring terminal point to point through the P2P server, and after the point-to-point connection of the IP camera and the monitoring terminal is built, the IP camera directly transmits image data to the monitoring terminal. Compared with the prior art, the P2P video security and protection monitoring platform has the advantages of being simple in installation, convenient to debug, strong in expandability, good in information security and the like.

The invention discloses a double-bottom assembled flower box. The double-bottom assembled flower box is characterized by comprising a laminated double bottom, siamesed side faces, corners and upper edges, wherein the laminated double bottom comprises a siamesed bottom face, reinforcing ribs, a composite bottom and composite ventilating members, the siamesed side faces comprise aluminum-alloy assembled plates, adhesive sealants and reinforcing cocks, the corners comprise vertical type lateral corners and inner-buckled connecting members, and the upper edges are made of inner-buckled aluminum alloy and are integrally mounted on the inner-buckled connecting members and the aluminum-alloy assembled plates. The double-bottom assembled flower box is good in air permeability, high in strength and good in stability, the composite bottom plays roles in storing water and ventilating, and the side faces are good in sealing performance, so that the double-bottom assembled flower box is suitable for being popularized on a large scale during plant planting.

The invention provides a discharge friction generator, the working mode of which can adopt a vertical contact-separation mode or a sliding mode, the discharge friction generator comprising: a first friction unit comprising a first electrode; a second friction unit comprising a second friction layer and a second electrode, and the second electrode is arranged on the surface, away from the first friction unit, of the second friction layer; wherein a first preset interval is reserved between the second electrode and the second friction layer, and the position of the material of the second friction layer is different from the position of the material of the first electrode in the electrostatic sequence. According to the discharge friction generator, the frictional charge induction effect is enhanced by changing different contact distances between the friction layer in the friction generator and the electrodes of the friction layer, so that more high-density currents are generated by large-scale discharge during operation, and electric signals generated by triboelectrification and the discharge effect are coupled and cooperatively output.

The invention relates to an optical passive device, specifically to a fiber lens coupler and a manufacturing method thereof. Conventional fiber lenses, after metallized treatment, need to be fixed on the front end of a laser diode or optical waveguide to be coupled with the laser diode or the optical waveguide. The packaging technology is difficult, the cost is high, and the output power is low. According to the fiber lens coupler and the manufacturing method thereof disclosed in the invention, the front end of the fiber lens is fixed on a bar-shaped substrate made of glass materials with adhesive, the lens end of the fiber lens is suspended on the end portion of the substrate, a plurality of fiber lenses can be arranged on the substrate in array, and the tail fiber of the fiber lens is connected to a fiber connector. Only coupling and butt joint of a packaging base body and a laser diode or optical waveguide are needed. The manufacturing process of the fiber lens is simple, the problems of high technical difficulty and high packaging cost of the conventional fiber lens coupling package are effectively solved.

A bean jelly is prepared from bean milk, thickening agent and white gelatin through mixing bean powder with water to obtain bean milk, adding thickening agent, boiling, adding white gelatin, stirring while cooling, and cold storage.

The invention aims at providing a wavelength division multiplexing type non-contact online voltage monitoring system for a power transmission line, and belongs to the technical field of power detection. The monitoring system comprises a multi-wavelength laser transmitting-receiving device, a control-end wavelength division multiplexer, a monitoring-end demultiplexer, at least one voltage sensor, a monitoring-end wavelength division multiplexer, a control-end demultiplexer and a data collector, wherein the multi-wavelength laser transmitting-receiving device is used to output and receive laser; the voltage sensor is arranged at a voltage monitoring point of the power transmission line; the control-end demultiplexer receives laser output by the monitoring-end wavelength division multiplexer, reduces the laser into multiple paths of laser of different wavelengths, and outputs the multiple paths of laser to the multi-wavelength laser transmitting-receiving device; and the data collector obtains voltage data of the monitoring end according to signals obtained by the multi-wavelength laser transmitting-receiving device. Each voltage sensor comprises a non-contact voltage induction unit and a photoelectric conversion unit, wherein the non-contact voltage induction units is used to sense the voltage of the power transmission line and loads the voltage on the photoelectric conversion unit, and the photoelectric conversion unit receives laser output by the monitoring-end wavelength division multiplexer.

The invention discloses a rapid sequence of FC-SC, FC-SC-APC fiber. The rapid sequence is pressed tightly into an FC or SC shell (2) by a spring (3) through a spring connecting base (4); a tail shell (8) is arranged on the tail end of the spring connecting base (4) as an integration; a contact pin (1) is fixed in a contact base sleeve (5); the contact pin (1) is provided with a precise and tiny guide positioning hole (1-1) inside; the front end of the contact base sleeve (5) is provided with a carrying cavity (5-1) as a pressing device; the tail end of the contact base sleeve (5) is provided with a large conical cavity (5-3); a V-shaped block (9) and a gland (10) are arranged in the pressing device, the carrying cavity (5-1); a fastening screw (7) is connected with the tail end of the contact base sleeve (5) to form a locking cavity; and a bipyramid chuck (6) is arranged in the locking cavity. No jointing points of the rapid sequence achieve ultra-low insertion loss control; 8 degrees APC slope polishing significantly reduces the loss value in fiber jointing; and repeated recycling decreases the utilization cost.

The invention discloses a light-weight roof square planting box. The light-weight roof square planting box is characterized in that the whole planting box is in a square shape, hollow truncated-cone-shape water storage bodies and quincuncial hollow-out parts are arranged on the bottom face of the inner side of the planting box. Six hollow truncated-cone-shape water storage bodies form one group, each group of hollow truncated-cone-shape water storage bodies are distributed in an orthohexagonal shape, and each hollow truncated-cone-shape water storage body is located at a vertex of a regular hexagon. Each quincuncial hollow-out part is arranged at the central point of each group of hollow truncated-cone-shape water storage bodies, and connected with the corresponding hollow truncated-cone-shape water storage bodies to form one body. The side faces of the planting box are rectangles, rectangle connection fixing through holes are formed in the side faces, top faces of two connected side faces and L-shaped outer cambered surface inner buckle fold edges are arranged in each square planting box. The square planting boxes can be mutually connected in series or arranged in a clamped mode to form an inverted Y shape, a umbrella shape or a rectangular shape, when a layer of non-woven paper is laid in the square planting box, flowers and grass can be planted, and the box is low in weight, good in water-retaining property, low in cost, environmentally friendly, efficient, and suitable for application and popularization when a green light-weight roof is manufactured.

The invention discloses a tapping machining device and technology for a plug of a four-way reversing valve and belongs to the technical field of machining of four-way reversing valves. According to the tapping machining device and technology, a feeding air cylinder mechanism, a clamping air cylinder mechanism and a material stopping mechanism are used for conducting feeding, clamping, locating and tapping, discharging and other machining operation on plugs in an integrated mode, the production efficiency is remarkably improved, the automatic machining degree is high, the product quality is improved, the labor intensity of staff is greatly lowered, the effect of reducing the needed labor is remarkable, and the tapping machining device and technology are suitable for mass application and popularization.

The invention discloses a preparation method of functional probiotics capable of enhancing immunity and assisting antianaphylaxis, which belongs to the technical field of microbial preparations. The invention particularly relates to the preparation method of functional probiotics capable of enhancing immunity and assisting antianaphylaxis. The preparation method comprises the steps of preparing acomposite traditional Chinese medicine extract for later use; fully mixing composite active probiotics and composite prebiotics in proportion to obtain a mixture A; fully mixing the composite traditional Chinese medicine extract with the mixture A in proportion to obtain a mixture B; adding the mixture B into a composite culture medium, putting into a fermentation tank, and carrying out sealed fermentation to obtain a mixture C; and adding composite vitamins into the mixture C, and fully stirring and mixing to obtain the functional probiotics. The functional probiotics disclosed by the invention are prepared by taking composite active probiotics, composite prebiotics and the composite traditional Chinese medicine extract as raw materials through fermentation and mixing. The preparation method is simple. The preparation can be completed by adopting simple mixed fermentation equipment. The production cost is reduced, and the preparation method is suitable for large-batch popularization.

The invention discloses a planar joint robot. The planar joint robot is mainly characterized in that a first servo motor is mounted on a first harmonic reducer; the lower end of a connecting shaft is connected with an output shaft of the first harmonic reducer; a first bearing block is mounted on the top surface of the base; an upper arm is mounted on the connecting shaft through a screw; a second bearing block is mounted on the upper arm; the upper end of a rotating shaft is mounted on a forearm through a screw; a second servo motor is mounted on a second harmonic reducer; the second harmonic reducer is mounted on the forearm; an end cap is connected with an output shaft of the second harmonic reducer; a vertical plate is mounted on the forearm; a linear guide track is mounted on the vertical plate; a slider is mounted on the linear guide track; a movable sliding table is mounted on the slider; an upper bearing block is mounted on the vertical plate; a nut is mounted on a lead screw; a driven pulley is mounted on the top of the lead screw; a moving plate is mounted on the bottom surface of the upper bearing block; a third servo motor is mounted on the moving plate; and a driving pulley is mounted on an output shaft of the third servo motor.

The invention relates to a novel inclined projection imaging optical system, in particular to a novel optical system capable of enabling different areas of "a projected image" to be projected at different imaging distances. In a traditional projection and imaging optical system, "a projected image" is generally perpendicular to the optical axis of an optical projection system, and is parallel to the focal plane (that is, the projected image surface is parallel to the focal plane or the main surface of the projection system) of the projection optical system, so that the "optical image" formed by projection of the projection optical system is also perpendicular to the optical axis of the optical system. When the projection plane is not perpendicular to the optical axis of the projection optical system (that is, the projection plane is not parallel to the focal plane of the optical system), the system cannot obtain a relatively clear projection effect at the projection plane; and the structure disclosed by the invention can obtain a clear projection effect at different distances from the projection system. The system can be widely applied to vehicle-mounted projection and advertisement projection systems to form new products which can be clearly projected on an inclined projection plane.

The invention discloses a roof greening combined flowerpot. The roof greening combined flowerpot is characterized in that the roof greening combined flowerpot comprises a square pot body and a division plate, the two edge openings of the square pot body are provided with L-shaped folded edges, the middle of the square pot body is provided with water storage grooves and round through holes, the water storage grooves are distributed around the center of the inside of the pot body and close to the edge, water discharge holes are arranged inside the water storage holes in the middle which are distributed inside the flowerpot body and close to the edge of the pot body, polyacrylic resin water pipes are installed in the water discharge holes, the water discharge holes penetrate through the side face of the square pot body, the side face of the square pot body is provided with a reinforced rib, mutually connected rectangular semi-sunk trenches are arranged among the water storage grooves, the division plate is square, the periphery of the division plate is provided with arc folded edge trenches, the middle of the division plate is provided with a rectangular through hole, the two edge openings of the division plate are provided with L-shaped folded edges, and the division plate is installed and fixed above the water storage grooves and the round through holes inside the square pot body. The roof greening combined flowerpots can be utilized through mutual combined connection, the performance of water and nutrition storage is good, it is guaranteed that the water quality in the water storage groove is good, the breathability is good, the strength is high, and the roof greening combined flowerpot is stable, reliable, convenient to use and suitable for large-scale application and popularization.

The invention discloses equipment for machining a core iron part of a four-way reversing valve and a machining technology thereof, and belongs to the technical field of machining equipment. The machining equipment comprises a machine base, wherein a feeding opening is formed in one side of the machine base, and a discharging opening is formed in the other side of the machine base. The machine base is provided with a conveying belt used for connecting the feeding opening and the discharging opening and for conveying workpieces. A pre-installing station, a pressing station and a riveting station are sequentially arranged on the machine base from the feeding opening to the discharging opening. The pre-installing station is provided with a dragging rack part feeding device, a core iron feeding device and a pressing device used for combining a dragging rack part and core iron. By the adoption of the machining equipment and the machining technology, the core iron and the dragging rack part can be fed automatically, pre-installing, pressing and riveting are integrally achieved, production efficiency is improved obviously, the degree of machining automation is high, product quality is improved, the labor intensity of workers is greatly lowered, the human cost is lowered, the effect is obvious, and the machining equipment and the machining technology are suitable for being applied and popularized on a large scale.

The present invention discloses a feed for improving anti-stress capability of eriocheir sinensis and a preparation method thereof. The method is as follows: mixing bran, soybean meal, rapeseed meal and traditional Chinese medicine components to obtain a first mixture, and adding water to obtain a fermentation substrate; adding probiotics into the fermentation substrate, and conducting fermentation to obtain a fermented product; centrifuging the fermented product to obtain supernatant and underlayer precipitate, carrying out freeze drying on the supernatant to obtain a freeze-dried product, and drying the underlayer precipitate to obtain a second mixture; mixing complex vitamins, phagostimulant and the freeze-dried product, and preparing microcapsule granules with the obtained mixture as acore material; mixing corn flour, wheat middling and the like to obtain a fourth mixture, and carrying out puffing granulation to obtain puffed particles; and drying the puffed particles, and mixingthe particles with the microcapsule granules according to a preset proportion so as to obtain the feed for improving the anti-stress capability of eriocheir sinensis. The feed is prepared by adding the traditional Chinese medicine components and by a probiotics fermentation technology and a puffing granulation technology, and can improve the anti-stress capability of eriocheir sinensis.

The invention discloses an intelligent fly trapping device and relates to the technical field of fly capture. The intelligent fly trapping device comprises a device body. A controller, a power module, an infrared inductor, a transmission mechanism and an engine are installed in the device body. An automatic door is installed on the side face of the device body, the automatic door is sequentially connected with the transmission mechanism and the engine, and the controller is connected with the power module, the infrared inductor and the engine. The intelligent fly trapping device further comprises an attractant box, a power grid and a fly collecting box which are sequentially installed in the device body from top to bottom. The power grid is connected with the controller. The power module is connected with the infrared inductor, the engine and the power grid. The intelligent fly trapping device intelligently catches and kills flies in the whole process, and is high in efficiency and free of pollution.

The invention relates to a spectrophotometer optical system and a special optical filter picking mechanism for the same. The spectrophotometer optical system comprises a front light path (A), a sample cell (1), an optical splitting system (B) and a photoelectric receiver (2), and is characterized in that the front light path (A) comprises a light source (3) on the front end of the sample cell (1), wherein the light of the light source (3) is transmitted onto a first convex lens (4), a first reflection mirror (5) is installed at the side of the first convex lens (4) to be symmetric to the light source (3), the first reflection mirror (5) is arranged on a focal point of the first convex lens (4), the light enters the optical splitting system (B) from the sample cell (1) after being reflected by the first reflection mirror (5) to the sample cell (1), and the light is emitted onto the photoelectric receiver (2) after being analyzed by the optical splitting system (B). According to a spectrophotometer manufactured by the optical system provided by the invention, the size of the spectrophotometer can be reduced, the cost is greatly reduced, and the mass popularization is realized.

The invention discloses a driving cab rollover protection mechanism. The driving cab rollover protection mechanism comprises a rollover torsion bar; each of two ends of the rollover torsion bar is provided with a suspension lower support and a limiting arm; a limiting block is arranged at a position corresponding to each limiting arm on the corresponding suspension lower support; and when limiting is performed, a bottom surface of each limiting arm is attached to a top plane of the corresponding limiting block. A limiting structure formed by the limiting arms and the limiting blocks is simple in structure, and the center of gravity and the structure of a complete vehicle are not influenced. When limiting is performed, the bottom surface of each limiting arm is attached to the top plane of the corresponding limiting block, so that a high load can be borne, and the problem of limiting structure failure caused by the gravity of a driving cab is solved. The driving cab rollover protection mechanism disclosed by the invention is simple in structure, low in cost and high in enforceability, and is suitable for being popularized in large batches.

The invention discloses a mechanical two-jaw synchronous clamp structure and belongs to the technical field of mechanical clamps. The mechanical two-jaw synchronous clamp structure comprises a base, workpiece clamping bodies and two clamp pairs. Each clamp pair comprises a fixed clamping jaw and a movable clamping jaw. Each workpiece clamping body is fixedly arranged on the inner end face of the corresponding fixed clamping jaw and the inner end face of the corresponding movable clamping jaw through screws. The two fixed clamping jaws are fixedly arranged at the middle end of the base, the two movable clamping jaws are movably arranged at the left end and the right end of the base correspondingly, and the rear ends of the two movable clamping jaws are connected to the same driving device through corresponding 7-shaped connecting rods. The mechanical two-jaw synchronous clamp structure is convenient to use and high in work efficiency; the workpiece clamping bodies are matched with workpieces in shape and can be replaced at any time, and the practicability is high; connection is more flexible, force is transferred rapidly and accurately, and work is safer and more reliable; the occupied space is small, and compared with a rack-gear mode, the structure is more compact, cost is low, and the structure can be accepted by markets more easily and is suitable for large-scale popularization.

The invention discloses a direct insert optical fiber splice, which comprises a casing, and a guiding device used for guiding and positioning, a pressing device used for pressing naked fiber, and a locking device which are arranged in the casing. The locking device comprises a cartridge and an ejection pipe; the cartridge comprises a cylindrical body with an optical fiber hole; at least two locking heads are arranged at one end of the cylindrical body; at least one pressing lug is arranged at the other end of the cylindrical body; an arc surface which can be stretched under pressure is arranged on the upper end surface of the pressing lug body, and is higher than the outer surface of the cylindrical body; and the ejection pipe is acted on the pressing lug to press and stretch the pressing lug. The quick splice of the invention has the advantages that no splicing point exists inside the splice, the optical fiber (APC) splicing with directional angle can be realized; the optical fiber can be automatically fitted; the fastening is reliable; and the control with super low insert loss can be realized, and is larger than the control of 60 return loss structure; the on-site polishing can also be performed; the return loss value during the optical fiber connection can be greatly reduced; and the overall production cost is low.

The invention relates to the field of mechanical equipment, in particular to a clamp and a robot applicable to the clamp. The clamp comprises a mounting bracket, screw rods and at least one set of clamp assemblies, wherein the screw rods are arranged on the mounting bracket, and the clamp assemblies are arranged on the mounting bracket; and each set of the clamp assemblies comprises two clamping plates and a driving assembly, wherein the clamping plates are arranged on the mounting bracket, at least one clamping plate is connected to the screw rods so that the clamping plate can move through rotation of the screw rods, and the clamping plates are in a clamping state or in a loosened state through the driving assembly. According to the clamp, clamping is firm, the clamping efficiency is improved, the product rejection rate is reduced, and the labor intensity of workers is reduced.