35results about How to "Reduce the difficulty of maintenance and management" patented technology

The invention relates to a microwave communication transmission method and relative system, wherein it projects each communication service into virtual container VC4 of synchronous digit sequence; based on microwave capacity, from VC4, extracting service via different particles, to build microwave frame; based on microwave capacity, using relative modulation and sending out; demodulating the received signal to obtain microwave frame; rebuilding said microwave frame into VC4; projecting into relative communication service. The invention realizes integral PDH / SDH microwave communication on unique hardware platform, to distribute services uniformly.

The invention relates to an automatic weighing and feeding device for an electronic kiln, belonging to the technical field of the supporting facilities of electronic kilns. The automatic weighing and feeding device comprises a material conveying rack, an automatic material conveying mechanism, a metering rack, a weighing mechanism and a weighing disk moving mechanism, wherein the automatic material conveying mechanism is arranged at the top of the material conveying rack, the metering rack is arranged at one end of the material conveying rack, a first guide rail is fixedly arranged at one side of the top of the metering rack in the length direction, a second guide rail is fixedly arranged at the other side of the top of the metering rack in the length direction, the weighing mechanism is matched with the first guide rail and the second guide rail in a sliding manner and also corresponds to the automatic material conveying mechanism, and the weighing disk moving mechanism is arranged on the metering rack and is in transmission connection with the weighing mechanism. The automatic weighing and feeding device for the electronic kiln has the advantages that the requirements of uninterrupted weighing and metering are met by only one device, and then, the material conveying mechanism is guaranteed to uninterruptedly take materials, so that the design and the investment can be saved, the difficulty in the management and the maintenance of the device can be reduced, the efficiency can be increased, and the occupied space of a production site can be saved.

The invention discloses a cleaning type high-strength plastic grinder, belonging to the technical field of breaking devices. The cleaning type high-strength plastic grinder comprises a rack, a shatter box, a power plant, an upper shim, a lower shim, a material sieve plate, a power driven device and a feeding hopper. The cleaning type high-strength plastic grinder is characterized in that at least one inner wall of the feeding hopper is fixedly provided with a spraying and cleaning device; the lower part of one side of the rack is fixedly provided with a drainage layout device which corresponds to the lower part of the material sieve plate. The invention does not need to install a washing device singly, saves the occupied floor area, lowers the management and protection difficulty, saves labor and can prevent the sewage from spreading by the drainage layout device so as to protect the on-site operation environment.

The invention relates to an automatic weighing and feeding device for an electronic kiln, belonging to the technical field of the supporting facilities of electronic kilns. The automatic weighing and feeding device comprises a material conveying rack, an automatic material conveying mechanism, a metering rack, a weighing mechanism and a weighing disk moving mechanism, wherein the automatic material conveying mechanism is arranged at the top of the material conveying rack, the metering rack is arranged at one end of the material conveying rack, a first guide rail is fixedly arranged at one side of the top of the metering rack in the length direction, a second guide rail is fixedly arranged at the other side of the top of the metering rack in the length direction, the weighing mechanism is matched with the first guide rail and the second guide rail in a sliding manner and also corresponds to the automatic material conveying mechanism, and the weighing disk moving mechanism is arranged on the metering rack and is in transmission connection with the weighing mechanism. The automatic weighing and feeding device for the electronic kiln has the advantages that the requirements of uninterrupted weighing and metering are met by only one device, and then, the material conveying mechanism is guaranteed to uninterruptedly take materials, so that the design and the investment can be saved, the difficulty in the management and the maintenance of the device can be reduced, the efficiency can be increased, and the occupied space of a production site can be saved.

The invention relates to a semi-flooded sewage water biocontact oxidation tank and the sewage water processing method thereof. And it is separated by a nonflooded filling bearing layer into two parts, where the surfaces of the nonflooded and flooded fillings are attached with different microbes, and the sewage water entering in the tank is lower than the nonflooded filling bearing layer. And its processing method: firstly preprocessing the sewage water, feeding the sewage water into it and finally collecting the processed water, where the microbes on the surfaces of the nonflooded fillings are cultivated and acclimated by volatile smell-causing organic pollutants in the sewage water and those on the sufaces of the flooded fillings are cultivated and acclimated by the sewage water, and in the sewage water processing course, the sewage water is lower than the nonflooded filling bearing layer. And its removal rate of the volatile smell-causing organic pollutions is up to 90%-99%.

The invention discloses a gas well wellhead pressure-reducing well opening device and is designed for solving the problems that gas production and well opening in an oil filed are difficult and workload of gas well management and maintenance is large. The device is composed of a valve body communicated with a pipeline, a main valve core and an auxiliary valve core which are located in the valve body, a valve cover connected with an electromagnetic head, a T-type core rod, a decompression channel and springs in cavities. Due to the springs, energy of two-stage transmission is stored and pressure of a throttle nozzle is reduced, remote pressure reducing and opening of a gas well are achieved, the difficulty that an existing electromagnetic valve can not open the gas well remotely at high pressure is solved, difficulty of the gas well management and the maintenance is reduced, labor consumption and material consumption are reduced, and safe and stable production is guaranteed. The device coordinates with a remote control system so that the functions of remote control of opening and closing the gas well, automatic protection at the high and low pressure and the like are achieved, the informationized management level of the single well is improved, and the device has wide application prospects in the field of gas field exploitation.

The invention provides a multi-system verification method. The multi-system verification method comprises the following steps: receiving a user request, and determining a request category; verifying an operation authority when the category is an operation request, and performing the corresponding operation when the verification is passed; determining whether a token Assertion exists in the requestor not when the category is an access request; verifying whether the token Assertion is legal or not when the token Assertion exists in the request, and allowing to access to a client system when thetoken Assertion is legal; determining whether a service ticket ST exists in the request or not when the token Assertion does not exist; verifying whether the service ticket ST is legal or not when the service ticket ST exists, and allowing the user to access the client system when the service ticket ST is legal; and requiring the user to log in to obtain a new service ticket ST for verification when the service ticket ST does not exist, and allowing the user to access the client system when the new service ticket ST is legal. By applying the multi-system verification method provided by the invention, the user can use the client system without repeated login; therefore, the convenience of users to use the client system is increased, and the cost and difficulty of maintenance and managementof an enterprise to the client system is reduced.

The invention relates to the technical field of driving of hinge movable dams, in particular to a precise lifting hydraulic control system and a hinge movable dam. The precise lifting hydraulic control system comprises a liquid storage tank, a hydraulic pump, a hydraulic cylinder, a liquid inlet pipeline, a liquid return pipeline, a first valve, a second valve and a flow sensor; an inlet of the hydraulic pump communicates with the liquid storage tank; an outlet of the hydraulic pump communicates with an inlet of the hydraulic cylinder through the liquid inlet pipeline; an outlet of the hydraulic cylinder communicates with the liquid storage tank through the liquid return pipeline; the first valve and the second valve are respectively arranged on the liquid inlet pipeline and the liquid return pipeline; at least one of the liquid inlet pipeline and the liquid return pipeline is provided with the flow sensor; and the flow sensor is used for detecting the quantity of liquid flowing through the liquid inlet pipeline or the liquid return pipeline to calculate the lifting height of a dam body connected with a piston rod, so that the control precision of the lifting height of the dam body is improved, and the precise control of water impoundment and height adjustment under the condition of no cable arranged in a river channel is realized.

The invention provides a bond-type gas well opening slow-plugging device and an application method thereof. The bond-type gas well opening slow-plugging device comprises an oil pipe. A plurality of bond-type vortex generators are mounted in an inner cavity of the oil pipe and fixed to the inner wall of the oil pipe in a linear shape in the axial direction of the oil pipe. The two ends of the oil pipe are connected with a first flange and a second flange correspondingly. A hydrate filtering disc is further arranged in the inner cavity of the oil pipe, arranged in the downstream inner cavity ofthe oil pipe in the mode of being perpendicular to the center axis of the oil pipe, and located downstream the bond-type vortex generators. According to the bond-type gas well opening slow-plugging device and the application method thereof, through the vortex generators at the front end of the oil pipe and the hydrate filtering disc at the rear end of the oil pipe, the phenomena of wellhead frozenblocking and well opening failure due to the fact that a flowmeter flowing channel downstream a gas well wellhead pipeline is plugged by hydrate particles in the well opening process can be relievedand prevented, the gas well opening success rate is increased, the gas well management and maintenance difficulty is reduced, labor and material resources are saved, and the bond-type gas well openingslow-plugging device and the application method thereof have broad application prospects in the field of gas field mining.

The invention discloses a method of constructing a clustered tree landscape. The method comprises the specific steps of carrying out topographic prospecting and designing, selecting available trees,carrying out planting hole preparing and planting according to different planting positions, setting out drainage, breathable and supporting facilities according to the different planting positions, and carrying out maintenance measures. The modes, such as deep digging and planting, erection on the low-lying land and slope filling, are adopted herein; the materials, such as stones and wooden trestles, and the protective structures, such as drain pipes and breathable troughs, are adopted; conventional trees can be shaped into a surface clustered tree landscape in quick, efficient, economic andlong-lasting manner, and the problem that current cultivation of clustered plantlets experiences long cycle and high cost is solved. The method has good application value.

The invention discloses a gas well remote high-voltage well switching device and a control method thereof and belongs to the technical field of natural gas exploitation. The gas well remote high-voltage well switching device comprises a switch valve, a reducing valve and a first elastic piece, wherein the switch valve comprises a valve body, a valve cover, a valve core sleeve, and a valve core fixed with the reducing valve; the valve body is provided with a valve cavity, a gas outlet channel and a gas inlet channel, and the first end of the valve core sleeve and the valve cover and the valve cavity form a valve core sleeve upper cavity; the first elastic piece is fixed with the first end of the valve core sleeve and the valve cover; the valve core is operable to close or open the gas outlet channel, and the second end of the valve core sleeve is operable to prop against the valve core; the valve core upper cavity is formed between the first end of the reducing valve and the valve cover; the reducing valve is provided with a gas inlet and a gas outlet, the valve core sleeve can slide along the valve cavity to block or communicate the gas inlet channel and the gas inlet; and the valve core and the reducing valve can slide along the valve cavity to enable the gas inlet channel and the gas outlet channel to be blocked or closed, as a result, automatic switching of the gas well is remotely achieved at high voltage, and management and maintenance difficulty of the gas well as well as manpower and material resources are reduced.

The invention discloses an extensible multi-degree-of-freedom wave energy power generation device. The extensible multi-degree-of-freedom wave energy power generation device comprises at least one motion unit, wherein each motion unit comprises a central buoy, an upper buoy, a connecting arm, a conversion mechanism and a power output module; the central buoy is hinged with one end of the connecting arm through the conversion mechanism; the upper buoy is hinged with the other end of the connecting arm through the conversion mechanism; and the power output module is arranged in the upper buoy. The extensible multi-degree-of-freedom wave energy power generation device can collect wave energy through motion of the device in multiple degrees of freedom, so that the wave energy is absorbed to the greatest extent, and the wave energy collecting efficiency and the wave conversion efficiency are improved; the device is high in extensibility; and a plurality of sets of devices are easy to form awave energy power generation field with ultrahigh flexibility and centralized maintenance, so that the reliability of the device is improved, the service life of the device is prolonged, and the maintenance and management difficulty and the economic cost of the device are reduced.

The invention discloses a swage station's remote cluster control system, comprising a monitoring layer, a first transmission layer, a relay station, a second transmission layer and an execution layer, wherein the monitoring layer comprises a sever used to analyze the data transmitted from the swage station; the first transmission layer is used to complete the communications between the monitoring layer and the relay station; the relay station is used to forward the data information of the monitoring layer and / or the executing layer; the second transmission layer is used to complete the communications between the relay station and the execution layer; and the execution layer comprises a plurality of areas divided according to the region, and each of the area contains one or more swage stations that are remotely controlled. The swage station's remote cluster control system is capable of administering effective and uniformed monitoring and treatment to a plurality of swage stations of a plurality of regions so as to reduce the management difficulty brought about by the scattering distribution of the swage stations.

The invention discloses an ecological floating bed combination for biological treatment of surface polluted water. The ecological floating bed combination comprises plants and a matrix, the plant is at least one of rhizoma acori calami, rice, canna indica, iris tectorum, scirpus tabernaemontani and oenanthe javanica; the substrate is ceramsite, biochar and / or gravel; the biological treatment method for the surface polluted water body has the advantages that (1) ceramsite and biochar have certain adsorption capacity on pollutants in the floating bed water body, a good growth environment is provided for microorganisms while a good attachment point is provided for a plant root system, and the water quality purification effect is improved; (2) the plants are fixed by adopting ceramsite, so that the maintenance and management difficulty of easy lodging plants such as canna, iris tectorum and the like is reduced; (3) the ecological floating bed can better degrade pollutants in a medium-high-concentration water body, enough nutrient elements for plant growth exist in the high-concentration pollutant water body, the removal effect on the pollutants is enhanced while the plant growth is promoted, and the ecological floating bed has a good application prospect. Economic benefits and social benefits are achieved; (4) the purification effect of mixed planting of plants is higher than that of independent planting, and the mixed planting of plants is more suitable for water bodies with large water level change differences.

The invention discloses a band steel cold rolling oil composition and a preparation method thereof. The band steel cold rolling oil composition comprises the following components in percentage by mass: 70-90% of basic oil, 0.1-2% of an antioxidant, 0.5-4% of a slow release agent, 2-10% of an extreme pressure lubricant and 1-20% of an emulsifier. The preparation method comprises the following steps: putting basic oil into a reaction tank according to a ratio, and stirring and heating to an appointed temperature range; putting the antioxidant and the slow release agent into the mixture obtainedin the step 1, keeping the temperature range, and stirring till solids are completely dissolved; cooling the obtained mixed; putting the extreme pressure lubricant and the emulsifier into the mixtureaccording to a ratio, keeping a temperature range after cooling, and stirring till the mixture is completely uniform and transparent, thereby obtaining a finished product of the composition. Comparedwith the prior art, the band steel cold rolling oil composition is balanced in overall lubrication property and stability, cold rolling oil has good lubrication properties, and the maintenance and management difficulties can be reduced.

The invention belongs to the technical field of filling devices for down products and relates to a down transfer unit for a down-feeding fan of a down-filling machine. The down transfer unit comprises a switching mechanism fitting pipe, a down-feeding switching mechanism, and a down-changing switching mechanism; the upper end of the switching mechanism fitting pipe is provided with a down-feeding switching mechanism fixing flange by expanding, and the lower end thereof is provided with a down-changing switching mechanism fixing flange by expanding; one side of the switching mechanism fitting pipe is provided with a fan connecting sleeve connector by extension; a fan connecting sleeve is fixed to the fan connecting sleeve connector; the down-feeding switching mechanism is connected with the down-feeding switching mechanism fixing flange; the down-changing switching mechanism is connected with the down-changing switching mechanism fixing flange. After the fan connecting sleeve is connected with a fan, down feeding or down changing can be achieved through switching between the down-feeding mechanism and the down-changing switching mechanism; the manufacture cost of the down-filling machine is evidently reduced; availability of the fan is improved, and resources are saved; floor area is saved, and the ability to adapt to the places limited by mounting space is improved; equipment is easier to manage and protect, and maintenance cost is reduced.

The invention disclose a filtering device and a filtering method for hydrates of a surface pipeline of a well site of a natural gas well and belongs to the technical field of natural gas extraction. The filtering device for hydrates of the surface pipeline of the well site of the natural gas well comprises a gas inlet oil pipe, a middle oil pipe, a lower oil pipe, a front end vortex generating part, a middle end primary filter plate and a back end hydrate filter part. The tail end of the gas inlet oil pipe communicates to one end of the middle oil pipe perpendicularly while the other end of the middle oil pipe is connected to the lower oil pipe by a flange; the front end vortex generating part and the middle end primary filter plate are separately located at two ends of the middle oil pipe, and the front end vortex generating part is perpendicular to a gas inlet direction of the gas inlet oil pipe; and the back end hydrate filter part is located at the tail end of the lower oil pipe. The device and the filter method can be used for alleviating freezing and blocking condition of the surface pipeline when the gas well is opened, so that the gas well opening success rate is improved and the management and maintenance difficulty of the gas well is reduced.

The invention belongs to the technical field of natural gas extraction, and particularly relates to an electromagnetic type medium-low pressure gas collection well remote control well opening and closing device, system and method. The device comprises a valve body, a downstream flange, a pressure reduction mechanism, a high-pressure sleeve, a valve cover, a full-opening mechanism, a high-pressure sleeve pressurizing electromagnetic head group, a full-opening pressurizing electromagnetic head group, an upstream flange, a pressure reduction mechanism compression spring, a high-pressure sleeve compression spring, an air cylinder piston, an air cylinder, a high-pressure sleeve pressure relief electromagnetic head group and a full-opening pressure relief electromagnetic head group. In addition, a remote terminal unit RTU, an electric bypass valve and a flow meter form a remote control well opening and closing system, the problems that an existing well mouth remote control valve does not have the pressure reduction function and the flow meter is blocked to cause well opening failure are solved, the safety of the gas well is enhanced, and fine management of the gas well is achieved.

The invention relates to a gas recovery device for a low-pressure high-liquid gas well. The gas-liquid separator (4) from the wellhead of the device is connected with the external separator (18) by the pipeline A (19), and the single-flow automatic regulating valve B (9) is installed on the pipeline A (19). The pipeline (19) between the wellhead gas-liquid separator (4) and the single-flow automatic regulating valve B (9) is connected with a pipe (20) by a tee, and a single-flow automatic regulating valve is installed on the pipe (20) A(6), the end of the tube (20) is connected with a pressure-stabilizing airbag (7), and the pressure-stabilizing airbag (7) is connected to a compressor (10) through a pipeline, and the compressor (10) is connected to the single-flow automatic The pipeline A (19) between the regulating valve B (9) and the output separator (18) is connected, and a check valve (12) is installed on the pipeline B (21). The device completes automatic and continuous gas extraction, and has the characteristics of simple device, stable and reliable performance.

The invention relates to a semi-flooded sewage water biocontact oxidation tank and the sewage water processing method thereof. And it is separated by a nonflooded filling bearing layer into two parts, where the surfaces of the nonflooded and flooded fillings are attached with different microbes, and the sewage water entering in the tank is lower than the nonflooded filling bearing layer. And its processing method: firstly preprocessing the sewage water, feeding the sewage water into it and finally collecting the processed water, where the microbes on the surfaces of the nonflooded fillings are cultivated and acclimated by volatile smell-causing organic pollutants in the sewage water and those on the sufaces of the flooded fillings are cultivated and acclimated by the sewage water, and in the sewage water processing course, the sewage water is lower than the nonflooded filling bearing layer. And its removal rate of the volatile smell-causing organic pollutions is up to 90%-99%.

The invention discloses a power transmission device with a working part height difference compensation function, and belongs to the technical field of gardens and agricultural facilities. The power transmission device comprises a reduction gearbox shell, a reduction gearbox shell cover and a speed reduction transmission chain, the reduction gearbox shell is provided with a shell cavity, and the reduction gearbox shell cover is fixed to the reduction gearbox shell; a power input transmission mechanism is arranged between the reduction gearbox shell and the left end of the reduction gearbox shell cover, and the power output transmission mechanism is arranged between the reduction gearbox shell and the right end of the reduction gearbox shell cover; the left end of the speed reduction transmission chain is in transmission connection with the power input transmission mechanism, and the right end of the speed reduction transmission chain is in transmission connection with the power output transmission mechanism. The power transmission device has the following characteristics: the left end of the reduction gearbox shell and the left end of the reduction gearbox shell cover form a rectangular structure, the right end of the reduction gearbox shell and the right end of the reduction gearbox shell cover are raised upwards, and a working part height difference compensation angle is formed between the right end of the reduction gearbox shell and the right end of the reduction gearbox shell cover and the bottom plane of the left end of the reduction gearbox shell and the left end of the reduction gearbox shell cover. The power transmission device has the following advantages: the structure is simplified, equipment investment cost is saved, and daily management and protection difficulty is reduced.

The invention provides a method for separating an internal network from an external network, an authentication server and an access exchanger, wherein the method comprises the steps that: A, the authentication server authenticates the identity of a terminal according to an identity authentication request of the terminal for accessing the external network; B, after identity authentication request of the terminal for accessing the external network is passed, the authentication server sends a first policy to the exit gateway, determines the access exchanger and a first port corresponding to the terminal according to the pre-stored associated information, and sends the access exchanger a second policy aiming at the first port, the first policy is used for notifying the exit gateway to permit the communication between the terminal and the external network, the second policy is used for notifying the access exchanger to just transmit the target address as the message of the exit gateway forthe messages received by the first port. The invention can conveniently and efficiently realize the separation between the internal network and the external network and reduce the cost for realizing the separation between the internal network and the external network.

The invention discloses a gas well opening and ice blockage slowing device. The device comprises a vortex purging part located on the upper stream and a hydrate filtering part located on the lower stream; the vortex purging part comprises an upper oil pipe, a purging part upper end flange and a purging part lower end flange are fixed to the two ends of the upper oil pipe correspondingly, and a center rod is arranged in the upper oil pipe; rotational flow blades are fixed to the center rod, and starting ends and tail ends of the rotational flow blades are fixed to the inner wall of the upper oil pipe; the hydrate filtering part comprises a lower oil pipe, a filter upper end flange and a filter lower end flange are fixed to the two ends of the lower oil pipe correspondingly, and a filteringpipe bundle is fixed in the lower oil pipe through a pipe bundle base; and the vortex purging part and the hydrate filtering part are connected through the purging part lower end flange and the filterupper end flange. According to the gas well opening and ice blockage slowing device, hydrate particles larger than the inner diameter of a wellhead flow meter flow channel and generated in the needlevalve throttling well opening process can be filtered, the well opening freezing and blocking phenomenon of a gas well is relieved, the well opening success rate of the gas well is increased, and themanagement and maintenance difficulty of the gas well is reduced.

The invention provides a method and a system for establishing a cluster service. The method for establishing the cluster service comprises following steps: group calling initiating BSS receives a voice group calling request sent by an initiator and sends a service request message carrying supported voice coding-decoding types to a mobile switching center (MSC) according to the voice group calling request; the MSC receives a first group calling establishing request message sent by the initiator after the service of the MSC and the initiator is connected, wherein the first group calling establishing request message carries the voice coding-decoding types supported by the initiator and the group calling receiving BSS information; the MSC selects a first voice coding-decoding type for the use of the group calling initiating BSS through the group calling initiating BSS according to the service request message and the first group calling establishing request message; the MSC selects a second voice coding-decoding type for the use of the group calling receiving BSS through the group calling BSS according to the first voice coding-decoding type; group calling receiving BSS assigns the selected results to corresponding users. According to the technical scheme, by means of the IP-based A interface, voice group calling service is carried out with increased voice service quality and reduced network cost.

The present invention provides a method and system for establishing a trunking service. The method for establishing a trunking service includes: the group call initiating BSS receives the voice group call request sent by the initiator, and sends a voice group call request carrying its support to the mobile switching center according to the voice group call request. The service request message of the voice codec type; after the MSC is connected to the service of the originator, it receives the first group call establishment request message sent by the originator that carries the voice codec type supported by the originator and the group call reception BSS information; the MSC According to the service request message and the first group call establishment request message, select the first speech codec type used by the group call originating BSS through the group call originating BSS; the MSC selects the group call receiving BSS to use according to the first speech codec type through the group call BSS The second voice codec type: the group call receiving BSS assigns the selected result to its corresponding user. This solution can improve the voice service quality and reduce the network cost when the voice group call service is performed through the IP of the A interface.

The invention relates to the technical field of landscape water purification equipment. A GEP-detachable landscape water purification equipment, including a landscape water treatment system and a water distribution system, the landscape water treatment system includes five layers of treatment from top to bottom: physical filtration layer, enhanced ammonia nitrogen removal layer, micro-electrolysis enhanced microorganism Degradation layer, new matrix filler layer, and clear water area, the left side of the top of the landscape water treatment system is fixedly connected with an automatic DC transformer and an aerator. Aiming at the water quality problem of landscape water, the present invention provides a water treatment equipment that integrates physics, chemistry and biology, uses electric current to stimulate the life activities of microorganisms, strengthens the removal of pollutants in sewage by microorganisms, and uses new fillers to strengthen the adsorption of phosphorus The effect solves the difficult problem of phosphorus removal in sewage, and uses aeration to improve the removal effect of ammonia nitrogen, increase the concentration of dissolved oxygen in water, and improve the overall quality of landscape water in an environmentally friendly and efficient manner.

The invention belongs to the technical field of filling devices for down products and relates to a down transfer unit for a down-feeding fan of a down-filling machine. The down transfer unit comprises a switching mechanism fitting pipe, a down-feeding switching mechanism, and a down-changing switching mechanism; the upper end of the switching mechanism fitting pipe is provided with a down-feeding switching mechanism fixing flange by expanding, and the lower end thereof is provided with a down-changing switching mechanism fixing flange by expanding; one side of the switching mechanism fitting pipe is provided with a fan connecting sleeve connector by extension; a fan connecting sleeve is fixed to the fan connecting sleeve connector; the down-feeding switching mechanism is connected with the down-feeding switching mechanism fixing flange; the down-changing switching mechanism is connected with the down-changing switching mechanism fixing flange. After the fan connecting sleeve is connected with a fan, down feeding or down changing can be achieved through switching between the down-feeding mechanism and the down-changing switching mechanism; the manufacture cost of the down-filling machine is evidently reduced; availability of the fan is improved, and resources are saved; floor area is saved, and the ability to adapt to the places limited by mounting space is improved; equipment is easier to manage and protect, and maintenance cost is reduced.

The invention discloses a strip steel cold rolling oil composition and a preparation method thereof, which comprises the following components according to mass percentage: 70-90% of base oil, 0.1-2% of antioxidant, 0.5-4% of slow-release agent, Extreme pressure lubricant 2-10%, emulsifier 1-20%, the preparation method includes: adding base oil into the reaction tank in proportion, heating to the specified temperature range while stirring; adding antioxidant and slow-release agent in proportion Add to the mixture in step 1, keep the temperature range, and stir until the solid is completely dissolved; cool the obtained mixture; add the extreme pressure lubricant and emulsifier into the mixture in proportion, keep the temperature range after cooling, and stir Until the mixture is completely homogeneous and transparent, the finished composition is obtained. Compared with the prior art, in the present invention, the lubricity and stability of the cold-rolling oil are balanced overall, which not only ensures good lubricating performance of the cold-rolling oil, but also reduces the difficulty of maintenance and management.