30results about How to "Reasonable design ideas" patented technology

The invention provides a novel heterocycle perylene imide dimer compound with the structure shown in a formula (I) and a preparation method thereof as well as an application of the perylene imide dimer as an electron acceptor in an organic photovoltaic material. The compound shown in the formula (I) has the advantages that the problem that molecules aggregate owing to a very large acting force among the molecules when the traditional perylene imide molecules are in a solid state is solved, and heteroatoms are introduced at four positions, namely 6, 7, 6' and 7', of perylene diimide dimer in a single bond chain, so that close packing among the molecules can be effectively prevented, the crystallinity of a material is inhibited, the amorphous form performance is improved, the open-circuit voltage and light absorption efficiency are improved, and the photoelectric conversion efficiency is high.

The invention provides a gear type heterocyclic tripolyperylene tetracarboxylic acid diimide compound. The structural formula of the compound is as shown in the formula (I), wherein R1 is selected from any one of the following groups: C2-60 alkyl, substituent containing alkyl, alkoxy, substituent-containing alkoxy, aryl, substituent-containing aryl, alkyl aryl, substituent-containing alkyl aryl, alkyl heteroaromatic groups, substituent containing alkyl heteroaromatic groups, alkyl heterocyclic groups or substituent containing alkyl heterocyclic groups, and R1 in different positions is the same or different; R2 is selected from S or Se, and R2 in different positions is the same or different. According to the gear type heterocyclic tripolyperylene tetracarboxylic acid diimide compound disclosed by the invention, heteroatoms are introduced in six positions of 6, 7, 6', 7', 6'' and 7'' of single bonded tripolyperylene tetracarboxylic acid diimide to obviously improve the photoelectric conversion efficiency, and the gear type heterocyclic tripolyperylene tetracarboxylic acid diimide compound is reasonable and effective in design idea, simple in molecular structure and shortened in synthesis step, and further is an organic solar cell material with important application prospects.

The invention relates to a motor linkage technology, in particular to a construction method of mutual feedback system of synchronous generators and synchronous motors, which aims to solve the problems that the existing reducer power-load testing system has high cost and wastes energy. The invention has the following steps: two synchronous motors with the same performance parameters are chosen and then a stator of one motor can rotate relative to a rotor; the two synchronous motors are connected coaxially on the condition that the mechanical phases of the rotors are maintained the same; an electric motor is connected coaxially with the two synchronous motors; the armature outputs of the two synchronous motors are connected through the same phase, and then the angle of one synchronous motor stator is artificially rotated, and the rotated synchronous motor is operated in a state of the generator or the electric motor, while the other synchronous motor is operated in a state of the electric motor or the generator. The testing system constructed with the method is low-cost and energy-saving, and is applicable to the performance testing of reducers, synchronous motors, shafts, torque sensors, electric appliances, cables, and switch devices.

The invention discloses a polyolefin nanometer fiber film sensor for rapid bacterium detection and a preparation method thereof. According to the invention, polyolefin copolymer is adopted as a substrate material, and the chemically-modified polyolefin nanometer fiber film biosensor is prepared by surface chemical modification, and solid phase synthetic process of bioactive molecules. The nanometer fiber film biosensor prepared by the method of the invention overcomes, with respect to performance, the disadvantages of time consumption, manpower consumption, poor accuracy for bacterium culture and bacterial colony counting in traditional bacterium detection, realizes rapid detection of ATP released by bacteria by using the luminescence principle between triphosadenine, luciferase, and fluorescein, and realizes rapid response to biological harmful substances. With the solid phase synthesis, bioactive enzymes are well fixed on the surface of the nanometer fiber film, which realizes repeated and circular detection of bacteria. The nanometer fiber film sensor is widely applicable to fields of biotechnology, medical health, food and medicine detection, water treatment, and the like.

The invention relates to the field of organic photovoltaic materials, particularly to a triptycene-based perylene imide compound, a preparation method and applications thereof, wherein the triptycene-based perylene imide compound has the structure formula represented by T-1, T-2 or T-3, and R1 are selected from the following any groups: C2-60 alkyl, substituent-containing alkyl, alkoxy, substituent-containing alkoxy, aryl, substituent-containing aryl, alkyl aryl, substituent-containing alkyl aryl, alkyl heteroaryl, substituent-containing alkyl heteroaryl, alkyl heterocycle group and substituent-containing alkyl heterocycle group, and are the same or different. According to the present invention, with the triptycene-based perylene imide compound, the photoelectric conversion efficiency is significantly improved, the design idea is reasonable and effective, the molecular structure is simple, and the synthesis step is short; and the triptycene-based perylene imide compound is the organicsolar cell material with important application prospects. The formulas T-1, T-2 and T-3 are defined in the specification.

The invention discloses a polyolefin nanometer fiber film sensor for rapid bacterium detection and a preparation method thereof. According to the invention, polyolefin copolymer is adopted as a substrate material, and the chemically-modified polyolefin nanometer fiber film biosensor is prepared by surface chemical modification, and solid phase synthetic process of bioactive molecules. The nanometer fiber film biosensor prepared by the method of the invention overcomes, with respect to performance, the disadvantages of time consumption, manpower consumption, poor accuracy for bacterium culture and bacterial colony counting in traditional bacterium detection, realizes rapid detection of ATP released by bacteria by using the luminescence principle between triphosadenine, luciferase, and fluorescein, and realizes rapid response to biological harmful substances. With the solid phase synthesis, bioactive enzymes are well fixed on the surface of the nanometer fiber film, which realizes repeated and circular detection of bacteria. The nanometer fiber film sensor is widely applicable to fields of biotechnology, medical health, food and medicine detection, water treatment, and the like.

The invention discloses a wire row processing production line which comprises production equipment for producing wire rows. The production equipment comprises a first winding machine, a stroking straightening machine, a plastic packaging machine, a water cooling tank, a code spraying machine, a pulling machine, a second winding machine, a first conveyor belt, a first punching machine, a second punching machine, a second conveyor belt, a goods shelf, a hydraulic machine, a third conveyor belt, an injection molding machine and a fourth conveyor belt. The wire row processing production line has the advantages that four rows of cables can be effectively produced together by the wire row processing production line in the design, and accordingly the production efficiency can be improved; the integral wire row processing production line is compact in structure, and accordingly production can be facilitated; the cables can be processed and produced step by step by the wire row processing production line in the design, reasonable devices are used with one another, and accordingly the cost can be reduced during production; injection molding can be carried out on specific plastic components at skinning locations, accordingly, different structures can be processed, the wire row processing production line is reasonable in integral design thinking, and innovation points are novel; the cost can be reduced during wire row processing, the production efficiency can be improved during wire row processing, and accordingly the wire row processing production line is high in practicality.

The invention discloses an original rattan peeling and branch knot removing device for a rattan woven product. The device comprises a rack, wherein a strip feeding mechanism and a strip tidying mechanism are arranged on the rack at intervals, and a ring cutting mechanism is arranged between the two mechanisms; the ring cutting mechanism comprises symmetrically arranged middle supports, a ring cylinder is arranged between the middle supports, the ring cylinder is supported by rollers symmetrically arranged on the middle supports, a gear ring is arranged on the outer surface of the middle of the ring cylinder, the gear ring is meshed with a main gear, the main gear is connected to a hanging bracket in a hanging mode, the hanging bracket is fixedly connected in the rack, the side wall of the ring cylinder is through and is provided with supporting rods, the inner ends of the supporting rods are connected with a cutter holder, a ring cutter is arranged on the cutter holder, and the supporting rods are further sleeved with springs; and positioning is carried out through a pressing roller and a pressing strip, so that the rattan can enter in a straight line, and left-right movement is avoided; and meanwhile, the pressing roller can move up and down to be suitable for entering of rattans with different thicknesses, then the rattans are cut and peeled through the linkage ring cutter, so that the rattans spirally advance, finally, branch knots on the rattans are ground and removed through the cooperation of an upper peeling wheel and a lower peeling wheel, and the smooth and salient-point-free rattans are guaranteed.

The invention relates to an electrical junction box, in particular to an electrical junction box capable of preventing condensate water. The problem that an existing electrical junction box is unreasonable in condensate water prevention structure is solved. The electrical junction box capable of preventing condensate water is composed of a box body with an opening in one side and a cover plate covering the opening of the box body in a sealed mode and fixed to the opening of the box body. The periphery and the bottom of the box body are of a hollow structure except for a perforated part for a cable to penetrate. The cover plate is of a hollow structure; and the hollow parts of the box body and the cover plate are filled with thermal insulation materials or vacuumized. Heat conduction insideand outside the electrical junction box is cut off through a hollow structure and filling of a thermal insulation material or vacuumizing, and the purpose of preventing condensate water from formingis achieved. According to the invention, the hollow or sandwich structure is ingeniously applied to the electrical junction box, and the design idea is novel, unique and reasonable. The electrical junction box is suitable for bullet trains or locomotives, and is also suitable for being used in other fields in environments with violent changes of high temperature, low temperature and humidity.

The invention discloses an elevator internet-of-things alarm system. The elevator internet-of-things alarm system comprises a system assembly, wherein the system assembly comprises an elevator controlmodule, an acousto-optic alarm module and a user end module. The elevator control module comprises an elevator fault identification module, an integrated information processing module, a fixed program module and an information interaction module I. The acousto-optic alarm module comprises an acousto-optic alarm framework module, a sound alarm module, a light alarm module and an information interaction module II. Compared with the prior art, the elevator internet-of-things alarm system has the advantages that through cooperative work of the elevator control module, the acousto-optic alarm module and the user end module, the operation state of an elevator is monitored in real time; when a fault occurs, fault information is quickly transmitted to maintenance personnel, the time loss is greatly reduced, the maintenance efficiency is improved, and the safety of trapped people is improved; because an acousto-optic alarm function exists, the rescue possibility of the trapped people is increased; and the overall design idea is clear and complete, the design of each module is reasonable, and the creativity and practicability are excellent.

The invention discloses a milling lathe bed device for double-clamping and fixing long shaft pipe workpieces. The milling lathe bed device for double-clamping and fixing the long shaft pipe workpiecescomprises a lathe bed, wherein the lathe bed is fixedly connected with guide rails; sliding blocks are clamped onto the guide rails in a matching way and are fixedly connected with an upper body seat; the upper body seat is connected with a power assembly through a driving seat; a clamping assembly is fixedly connected to a lathe bed end far away from a servo motor of a power assembly; the lathebed is connected with multiple positioning pipes and a hydraulic cylinder; the hydraulic cylinder is connected with a liquid inlet pipe; the liquid inlet pipe is connected with a hydraulic station; the hydraulic station is connected with an outlet end of a liquid return pipe; the liquid return pipe is connected with the hydraulic cylinder; a piston rod of the hydraulic cylinder is connected with pressing plate shafts; and pressing plates are connected to the upper ends of the pressing plate shafts. According to the milling lathe bed device for double-clamping and fixing the long shaft pipe workpieces provided by the invention, various angle shapes of a circumference can be processed through one-time clamping, and the occurrence of the phenomena of unclamping, scratching and the like causedby accumulated errors produced by secondary clamping, overlong and overweight workpieces, and other problems is avoided.

The invention discloses a bath geothermal tail water combination treatment device. The bath geothermal tail water combination treatment device comprises a coagulation sedimentation system, a membranebioreactor, a membrane system A and a membrane system B, wherein the coagulation sedimentation system, the membrane bioreactor, the membrane system A and the membrane system B are sequentially connected in series to form a second first treatment branch which is used for treating tail water with the relatively low high COD content, and the coagulation sedimentation system, the membrane system A andthe membrane system B are sequentially connected in series to form a second treatment branch which is used for treating tail water with the relatively low COD content.. According to the combination treatment device, In in the treatment process of bath geothermal tail water through the combination treatment device, the content of total dissolved solids (TDS), fluoride, chloride, boron and the like in produced water are is decreased, and efficient reducing of bath geothermal tail water pollutants is achieved. The combination treatment device is novel and reasonable in design thought, simple,and reliable in use, and provides technical support for secondary utilization of the bath geothermal tail water.

The invention relates to the field of organic photovoltaic materials, in particular to a gear-type trimerized perylene diimide compound and its preparation method and application. The structural formula of the gear type trimerized perylene diimide compound is shown in formula (I): wherein, R 1 Any group selected from the following: C 2‑60 Alkyl, substituted alkyl, alkoxy, substituted alkoxy, aryl, substituted aryl, alkylaryl, substituted alkylaryl, alkylhetero Aryl, substituted alkylheteroaryl, alkylheterocyclyl or substituted alkylheterocyclyl; R 1 same or different. The gear-type trimer perylene diimide compound of the invention obviously improves the photoelectric conversion efficiency, has reasonable and effective design ideas, simple molecular structure, and short synthesis steps, and is an organic solar cell material with important application prospects.

The present invention relates to the field of organic photovoltaic materials, in particular to a tripcene-based peryleneimide compound and its preparation method and application. The structural formula of the peryleneimide compound based on tripterene is shown as T-1, T-2 or T-3: wherein, R 1 Any group selected from the following: C 2‑60 Alkyl, substituted alkyl, alkoxy, substituted alkoxy, aryl, substituted aryl, alkylaryl, substituted alkylaryl, alkylhetero Aryl, substituted alkylheteroaryl, alkylheterocyclyl or substituted alkylheterocyclyl; R 1 same or different. The tripterene-based peryleneimide compound of the present invention obviously improves the photoelectric conversion efficiency, has reasonable and effective design ideas, simple molecular structure, and short synthesis steps, and is an organic solar cell material with important application prospects.

The present invention provides a gear-type heterocyclic trimer perylene diimide compound, the structural formula of which is shown in formula (I): wherein, R 1 Any one of the following groups: C 2‑60 Alkyl, substituted alkyl, alkoxy, substituted alkoxy, aryl, substituted aryl, alkylaryl, substituted alkylaryl, alkylhetero Aryl group, alkyl heteroaryl group containing substituent, alkyl heterocyclic group or alkyl heterocyclic group containing substituent, R in each position 1 same or different; R 2 Selected from S or Se, R at each position 2 same or different. The gear-type heterocyclic trimerized perylene diimide of the present invention introduces heteroatoms at six positions of 6, 7, 6', 7', 6", and 7" of the single bonded trimerized perylene diimide, The photoelectric conversion efficiency is obviously improved, the design idea is reasonable and effective, the molecular structure is simple, and the synthesis steps are shortened. It is an organic solar cell material with important application prospects.

The invention discloses a lipoic acid modified chondroitin sulfate-chlorin e6 amphoteric polymer. According to the polymer, chondroitin sulfate is used as a water-soluble framework material, chlorin e6 serves as a hydrophobic modifier to be connected into a chondroitin sulfate framework, lipoic acid is used as an interface cross-linking agent to conduct surface modification on a chondroitin sulfate-chlorin e6 polymer, and the polymer further has a hydrophobic core to be capable of entrapping an insoluble anti-tumor drug. The lipoic acid modified chondroitin sulfate-chlorin e6 amphoteric polymer prepared by the invention is used as a drug carrier to prepare reversible cross-linked nano-micelles, and thus rapid decrosslinking in tumor cells can be realized; and as an excellent nano-carrier,sonodynamic therapy (SDT) of the tumors is achieved, and the lipoic acid modified chondroitin sulfate-chlorin e6 amphoteric polymer has the effects of increasing the level of active oxygen in the cells, promoting tumor cell apoptosis and remarkably inhibiting tumor cell growth. Meanwhile, the hydrophobic core provides entrapment of the anti-tumor drug, combined application of chemotherapy and SDTof the tumors can be achieved, and the anti-tumor effect is expected to be improved.

The invention discloses a high-salinity heating geothermal tail water treatment system which comprises a membrane system A and a membrane system B, wherein the membrane system A comprises a first liftpump, a first filter structure and an external-pressure ultrafiltration membrane which are sequentially connected in series; a first pressure gauge is arranged on a pipeline between the first lift pump and the first filter structure; the membrane system B comprises a second lift pump, a second filter structure and a nanofiltration membrane which are sequentially connected in series; a water inletend of the second lift pump is communicated with a water outlet end of the external-pressure ultrafiltration membrane; a second pressure gauge is arranged on a pipeline between the second lift pump and the second filter structure. In a tail water treatment process, the high-salinity heating geothermal tail water treatment system disclosed by the invention can reduce the content of overproof indexes such as TDS, fluoride, chloride and boron, and realizes efficient reduction of pollutants in the tail water. The treatment system disclosed by the invention has the advantages of novel and reasonable design idea, simple device and reliability in use, and provides technical support to secondary utilization of high-salinity heating geothermal tail water.

The invention discloses a treatment system for high-salinity bathing geothermal tail water. The treatment system comprises a coagulating sedimentation system, a membrane system A, an activated carbonsystem and a membrane system B. According to the treatment system for the high-salinity bathing geothermal tail water, in the tail water treatment process, the content of fluoride, boron and the likein water can be decreased, and therefore pollutants in the bathing geothermal tail water can be efficiently reduced. The treatment system has the advantages of being novel and reasonable in design through, simple in device, reliable in use and capable of providing technical support for secondary utilization of the high-salinity bathing geothermal tail water.

The invention relates to a single lap riveted joint anti-bend fixture which is characterized by comprising an upper clamping plate, a lower clamping plate and a single lap joint test piece, wherein the lower clamping plate comprises a first clamping plate section at a fixing end and a second clamping plate section at a riveting end; the single lap joint test piece is fixedly riveted with the second clamping plate section of the lower clamping plate by virtue of rivets; the upper clamping plate and the first clamping plate section of the lower clamping plate are fixed by a countersunk screw. The invention further relates to a design method of the single lap riveted joint anti-bend fixture. The design method comprises the following steps: 1) determining a thickness of the single lap joint test piece and a diameter of a rivet mounting hole according to test requirements; 2) calculating to analyze the maximum turning angle and maximum deflection at the single lap riveted joint; 3) optimizing and determining the thickness of the upper clamping plate. The single lap riveted joint anti-bend fixture disclosed by the invention is scientific and reasonable in structural design and convenientto clamp, excessive bending deformation of the single lap riveted joint can be effectively avoided, and the influence of bending on fatigue test results are avoided.

The invention discloses a folate-modified chondroitin sulfate-deoxycholic acid polymer as well as a synthesis method and application thereof. With chondroitin sulfate as a water-soluble skeleton material, a water-soluble skeleton is subjected to hydrophobic transformation with deoxycholic acid and folic acid through adipic dihydrazide as a connecting arm, so as to prepare a folate-mediated nano-carrier material with folate receptor and CD44(+) receptor tumor cell dual-targeting ability. The folate-modified chondroitin sulfate-deoxycholic acid polymer disclosed by the invention has good biocompatibility, non-immunogenicity and biodegradability. The prepared tumor dual-targeting drug-loaded nano-micelle is round in appearance, good in stability, high in encapsulation efficiency and high in drug loading capacity, and has excellent slow-release property and good application prospect; the target concentration of the drug can be enhanced; the tumor-killing treatment effect is enhanced; the non-specific toxic or side effect is reduced.

The invention discloses a hydraulic system of a high-rise residential building elevator. The hydraulic system comprises a master oil tank (1), wherein the master oil tank (1) is connected with a working oil line via an oil filter (2). The hydraulic system is characterized in that the working oil line comprises a hydraulic pump A (3); an inlet of the hydraulic pump A (3) is connected with an outlet of the oil filter (2); an outlet of the hydraulic pump A (3) is connected with a safety valve A (5) and a P port of a three-position four-way proportional reversal valve A (8) in parallel via a one-way valve A (4); a B port of the three-position four-way proportional reversal valve A (8) is connected with an oil outlet of a hydraulic cylinder (13); a T port of the three-position four-way proportional reversal valve A (8) is connected with an oil tank A (7); and an A port of the three-position four-way proportional reversal valve A (8) is connected with an inlet of a speed regulating valve A (9) and an outlet of a one-way valve C (11) in parallel. The system is reasonable in design, simple in structure, easy to achieve, moderate in cost and convenient to service and maintain, can effectively improve safety and reliability of the elevator in an operating process, and runs stably and comfortably at the same time.

The invention discloses an automatic hot runner system structure designing device and method. The automatic hot runner system structure designing device comprises an input module, a display module, a two-dimensional structure framework generating module, an automatic design information storing module and an automatic three-dimensional structure generating module. The input module is used for inputting product information, mold information and hot runner system structure information. The display module is used for displaying the positions of hot runners and technical data used by the corresponding hot runners. The two-dimensional structure framework generating module is used for generating a two-dimensional structure framework and completing two-dimensional drawing design. The automatic design information storing module is used for automatically storing the design information of a hot runner system structure in a server. The automatic three-dimensional structure generating module is used for automatically generating a two-dimensional structural drawing. The device reduces the technical requirements of hot runner designers, accelerates the information exchanger rhythm of the hot runner design and mold design, improves the overall design efficiency of the hot runner system and also has the great promoting role on later production and delivery.

The invention specifically relates to a tumor-targeting nano-micelle, a preparation method and an application as a drug carrier. Aiming at the defect of poor selectivity of traditional chemotherapy methods, the purpose of the present invention is to design a drug delivery carrier with multi-functional targeting effect and a sonodynamic effect, so as to improve the delivery efficiency of anti-tumor drugs. Based on the above technical purpose, the present invention provides a multifunctional targeted nano-drug delivery system with chondroitin sulfate as the backbone, with water-soluble chondroitin sulfate as the basic skeleton, and rhein and lipoic acid as hydrophobic modifications. Nanomicelles are small in size and have good drug loading effect and encapsulation efficiency. The disulfide bonds on the surface of nanomicelles can be specifically broken after reaching the tumor site, thereby achieving targeted release; nanomicelles can promote the ability of rhein to generate active oxygen under the stimulation of ultrasound, effectively improving the antitumor drug efficacy. utilization rate. The tumor-targeting nanomicelle provided by the invention has good application prospects as an antitumor drug carrier.

The invention discloses an aerospace anti-latching circuit. The aerospace anti-latching circuit can effectively solve an anti-locking problem of a large-current module, has the advantages of simple and reliable circuit and less components, and is convenient for multiple paths and integral use in large quantities. A high-performance operational amplifier and a sampling resistor are firstly adopted to finish the sampling of a load current signal, the load current signal is converted into corresponding voltage, current-limiting time setting is finished through a one-order RC (Resistance-Capacitance) circuit, then, and the voltage and preset current-limiting voltage are compared so as to control the enabled end of a power supply module to finish the power-up and off control of the power supply module to realize the protection of the load.

The invention discloses an adjusting type correcting chair. The adjusting type correcting chair comprises a chair body. The structure of the chair body is as follows: the inner sides of upper parts and lower parts of rear legs are connected with one ends of upper inner rods and lower outer rods, respectively, the other ends of the upper inner rods movably sleeve in upper outer rods, the other endsof the upper outer rods are connected to the upper parts of the inner sides of front legs, the other ends of the lower outer rods movably sleeve outside lower inner rods, a front seat board and a rear seat board are connected to the tops of the front legs and the rear legs, a back board is integrally arranged on the tops of the rear legs, and height limiting rods of a correcting mechanism are symmetrically arranged on the back board in a penetrating manner. The adjusting type correcting chair has the advantages that the structure is compact, the design thought is reasonable, the width of a chair board can be changed through an adjusting mechanism, so that the sitting of a student is facilitated, a comfortable seat environment is provided for the student, then the physical development of the student is facilitated, through the correcting mechanism arranged on the back board, the forward arching of the student can be limited, so that humpback can be avoided, and further, the normal physical development of the student at the developmental stage is guaranteed.

The invention relates to a low molecular heparin-glycyrrhetinic acid polymer and its synthetic method and application. The synthetic method comprises the following steps: firstly synthesizing low molecular heparin-adipodihydrazide; synthesizing glycyrrhetinic acid succinate; preparing an active ester solution of glycyrrhetinic acid succinate; and finally synthesizing the low molecular heparin-glycyrrhetinic acid polymer. According to the invention, heparin is used as a water-soluble skeleton material, and glycyrrhetinic acid is used to carry out lyophobic modification on the water-soluble skeleton through succinic anhydride and adipodihydrazide used as linkers so as to prepare a glycyrrhetinic acid-mediated nano-carrier material with targeting capability. The heparin-glycyrrhetinic acid polymer has good biocompatibility, biodegradability and non-immunogenicity. Prepared hepatocyte-targeted drug-loaded nano-micelles have high entrapment rate and drug loading capacity, have excellent slow-release property, can enhance drug treatment efficacy and reduce non-specific toxic and side effect, and have a good application prospect.

The invention discloses an optical fiber distribution type multi-point online gas monitoring system and a main engine of the optical fiber distribution type multi-point online gas monitoring system. The optical fiber distribution type multi-point online gas monitoring system comprises the main engine and a monitoring probe distributed on each monitoring point, wherein the main engine is internally provided with a laser device; an output end of the laser device is connected to an input end of an output optical switch; the output end of the output optical switch is connected to each corresponding monitoring probe through an input optical fiber; each monitoring probe is connected to the corresponding input end of an input optical switch arranged in the main engine by an output optical fiber; the output end of the input optical switch is connected with an infrared photoelectric detector; the main engine is internally provided with a control module for controlling the output optical switch and the input optical switch to strobe and set a corresponding light path of each monitoring probe. According to the optical fiber distribution type multi-point online gas monitoring system and the main engine of the optical fiber distribution type multi-point online gas monitoring system, the main engine adopts the optical switches to realize time sharing multiplex of laser; under the condition of the laser devices with the same power, an optical fiber sensor can be distributed further; furthermore, only a single infrared photoelectric sensor needs to be arranged behind the output optical switch, so that the cost is reduced.