689 results about "Slurry pump" patented technology

The invention relates to the technical field of welding, and provides slurry pump shell welding equipment which comprises a mechanical arm, a welding gun and a workbench, and further comprises at least two moving tables, a clamping seat, a profiling self-adaptive clamp system, a preheating part and a slow cooling system, and the welding gun is mounted at the movable end of the mechanical arm; the clamping seat is rotatably arranged on the moving table, the profiling self-adaptive clamp system is installed on the clamping seat and used for adaptively clamping the inner side and the outer side of a slurry pump shell, and the preheating part is installed at a welding gun and used for locally and precisely preheating the welding position. The slow cooling system and the profiling self-adaption clamp system are matched to conduct heat preservation and slow cooling on the slurry pump shell after welding, the slow cooling system comprises a heating bin and an air supply pipe, the heating bin is installed on a clamping base, and a heater and a draught fan are installed in the heating bin. According to the technical scheme, the technical problem that in the prior art, the preheating effect and the post-welding heat preservation and slow cooling effect are poor is solved.

The invention provides a drilling control method and system for a self-propelled complex drill bit, and the method comprises the steps: setting a rated cutting torque through obtaining roadbed soil, hydraulic power and geometric parameters, calculating the total propulsion resistance based on the roadbed strength to control the axial jacking force, and carrying out the safety verification of the drag force; calculating a critical flow velocity according to the characteristics of the drilling slag to adjust the discharge capacity and negative pressure of the slurry pump so as to determine an operation boundary; drilling and deslagging are cooperatively executed under the boundary, and the trajectory is corrected by combining a PID algorithm and the propulsion speed is optimized based on the theoretical mechanical drilling speed. According to the method, the technical problems that existing trenchless construction depends on experience to set parameters, scientific quantitative calculation of the slag discharge flow speed and the safety drag force is lacked, and then pipe cable blockage and drainage pipe damage are caused can be solved, and full-system cooperative efficient control of drilling, propelling, slag discharge and guiding based on multi-field coupling calculation is achieved.

The utility model relates to the technical field of mud pump trucks, in particular to mud pump truck pipeline anti-blocking equipment which comprises a truck body, the truck body comprises a base, a pump body is fixedly installed on the surface of the base, a feeding pipe is fixedly connected to the surface of the pump body, and a discharging pipe is fixedly connected to the surface of the pump body. Through the arrangement of the filter plate, large impurity particles in slurry can be intercepted, the large impurity particles can be filtered out, the situation that the large impurity particles enter the pump body and the inner side of the conveying pipeline, and consequently the pump body and the conveying pipeline are blocked can be avoided, the conveying effect of the pump body can be guaranteed, and the service life of the pump body is prolonged. And meanwhile, the screw rod rotates and drives the insertion rod to move, insertion and separation of the insertion rod and the insertion groove can be achieved, limiting and limiting releasing of the mounting rod are facilitated, then cleaning or replacement of the filter plate is facilitated, and therefore the filtering effect of the filter plate on large impurity particles can be guaranteed.

The invention discloses a method for treating gangue through paste-slurry combined filling under the condition of a cut-off type roof, which specifically comprises the following steps: obtaining the yield and particle size distribution of mine gangue according to a product balance table for guiding a paste filling system, an underground coal gangue separation system and a slurry filling system; filling spacing is dynamically adjusted according to the lithology of the roof, the filling spacing is determined by controlling the number of intervals of the supports, it is guaranteed that a paste roof-contacted supporting roof rock stratum collapses, and a stable slurry filling space is constructed; gangue in a ground gangue bin enters a slurry filling system and automatically flows to a slurry pump to be pumped to the position above a working face along a filling pipeline, vertical drilling is constructed in an underground goaf to the position above a slurry filling space, and the filling pipeline is arranged to complete filling; the large-scale disposal of all gangues above and below the mine is completed according to continuous and sequential circulation of mine excavation. By means of paste-slurry filling combined operation, all underground filling treatment of underground gangue solid waste of the million-ton level is achieved, support to a top plate is reinforced through paste-slurry combination, and mine pressure is effectively weakened.

The invention discloses a digital diaphragm wall closed-loop pouring system and construction method.The digital diaphragm wall closed-loop pouring system comprises a concrete supply device, a central integrated control machine and at least one pouring unit electrically connected with the central integrated control machine, and each pouring unit comprises a pouring mechanism, a slurry pumping mechanism and the central integrated control machine; an active pressure pouring technology is adopted, continuous and controllable extra power is provided for concrete flowing through a pressurizing mechanism such as a concrete pump or an air pressure pressurizing system, and a traditional pouring mode purely depending on concrete gravity is replaced. By means of the basic change, the concrete in the guide pipe can actively overcome larger mud static pressure and pipeline resistance, and therefore the technical problems that due to the fact that the burial depth is too large, the concrete cannot flow out smoothly, the pipe is blocked, and even a pile is broken are thoroughly solved.

The invention relates to the technical field of coating die head control methods, in particular to an ML-based coating die head and slurry pump feedforward prediction control method, which comprises the following steps: collecting coating process parameters in real time to construct an input feature vector; a PID control algorithm is used for calculating the basic adjusting quantity according to the partition surface density deviation and the average surface density deviation; inputting the basic adjustment quantity and the input feature vector into a machine learning prediction model to obtain a surface density change prediction value; calculating a prediction trust coefficient in combination with historical prediction accuracy, and generating a feed-forward correction quantity based on the deviation between a surface density change prediction value and a target value and the prediction trust coefficient; and superposing the basic regulation quantity calculated by the PID control algorithm and the feedforward correction quantity, and then outputting a final control instruction. According to the method, through feedforward fusion of machine learning prediction and PID control, the hysteresis quality of traditional PID control is effectively overcome, waste materials caused by abnormal surface density are reduced, and the stability and consistency (the CPK value is higher and the COV value is lower) of the coating process are remarkably improved.

The utility model provides a slurry shield machine slurry testing system which comprises a storage tank, a slurry pumping assembly, a slurry testing assembly, a pipeline, a funnel and a first measuring flask arranged on one side of a support, a second measuring flask arranged on the other side of the support, the funnel is located above the first measuring flask, a first screen is arranged in the funnel, and a funnel opening and closing electric ball valve is arranged at the bottom of the funnel. A first measuring flask is supported on an electronic weighing instrument, a second measuring flask is flush with the first measuring flask, a laser tester is arranged on a support and is aligned with a set scale on a funnel, a capacitance proximity switch is arranged below the funnel, and a clamping ring is an open-close type clamping ring which is rotatably arranged on the support. According to the automatic sampling device, automatic sampling and automatic detection can be achieved, time and labor are saved, efficiency is high, accuracy and reproducibility are good, and shield construction can be better guided.

The invention belongs to the field of slurry pump sheath machining, and particularly relates to a tool for a vertical lathe and a clamping method.The tool comprises a chuck, a clamp, an extension device and a driving device.The chuck is installed on the vertical lathe, the driving device is installed in the chuck, a groove is formed in the surface of the chuck, and the extension device is arranged in the groove. The driving device is provided with a groove, the clamp penetrates through the groove to be connected with the driving device and is connected to the chuck in a sliding mode, the extending device is fixedly connected to the end of the clamp, a workpiece is arranged on the chuck, and the extending device is connected with the side portion of the workpiece in an abutting mode. Compared with a traditional clamp, the clamp has the advantages that the height is increased, a large-size slurry pump sheath can be better clamped, a traditional clamp heightening mode is replaced, manpower is saved, efficiency is improved, reference can be provided for centering adjustment of the sheath, and a more convenient and accurate centering mode is provided.

The invention relates to the technical field of mud liquid level monitoring, and discloses a drilling mud liquid level monitoring and alarming device which comprises a drilling mud pool, the drilling mud pool is used for an oil and gas field drilling fluid circulating system, the drilling mud pool receives and deposits drilling fluid returned from a wellhead, and the drilling fluid is recycled by a mud pump after being treated; the monitoring module comprises a bearing frame, a liquid level monitoring assembly, a fluctuation response assembly and a cleaning control assembly; and the cleaning control assembly is associated with the fluctuation response assembly and the liquid level monitoring assembly and is configured to drive the cleaning control assembly to work so as to clean the surface of the receiving end of the photoelectric liquid level sensor when the fluctuation response assembly acts in response to fluctuation. Through the fluctuation response assembly and the cleaning control assembly, automatic cleaning of the liquid level monitoring assembly is achieved, and the problem that monitoring data are inaccurate or even invalid due to the fact that a traditional sensor is prone to contamination in a severe mud environment is effectively solved.

The utility model discloses a sea sand cleaning system based on micro-nano bubble, including micro-nano bubble generating device, sand-water mixing device, slurry pump, whirlcone, delivery pipeline and screening device, micro-nano bubble generating device is provided in the one side of sand-water mixing device, the sand-water mixing device passes through the slurry pump and is communicated with whirlcone, the delivery pipeline passes through the whirlcone, the delivery pipeline passes through the delivery pipeline, the screening device passes through the delivery pipeline, the delivery pipeline passes through the delivery pipeline, the delivery pipeline passes through the delivery pipeline. The screening device is arranged below the swirler, and the micro-nano bubble generating device, the sand-water mixing device, the slurry pump and the swirler are sequentially communicated through a conveying pipeline; through mutual cooperation of the micro-nano bubble generating device, the sand-water mixing device, the slurry pump, the cyclone, the conveying pipeline and the screening device, sea sand is cleaned by utilizing the characteristics of micro-nano bubbles, and chloride ions, pollutants and the like attached to the surface, tiny gaps and deep layers in the sea sand are stripped out, so that the efficient and sufficient cleaning effect is achieved.

The invention provides a disassembly-free maintenance high-temperature slurry oil pump and a maintenance method thereof, and aims to solve the problems that an impeller of an existing high-temperature slurry oil pump usually adopts an impeller wear ring for wear-resistant protection, on one hand, the impeller wear ring is possibly loosened due to thermal expansion difference or material occlusion tendency, and on the other hand, when the impeller wear ring is abraded and needs to be replaced, the impeller wear ring is damaged. And parts such as a bearing box body, a pump cover, an inner pump cover and the like need to be completely disassembled. According to the high-temperature slurry oil pump capable of being maintained without disassembly, the wear-resistant surface is integrally arranged on the surface of the impeller to replace an impeller wear ring, and the problem that when the impeller wear ring is replaced, the whole pump part needs to be disassembled is solved; besides, a plurality of adjusting blocks are arranged between the bearing box and the bearing box body in the circumferential direction and matched with the wear-resistant surface of the impeller, so that when the sealing gap between the impeller and the wear-resistant volute becomes large, the sealing gap between the impeller and the wear-resistant volute can return to the standard sealing gap value only by disassembling the adjusting blocks and adjusting the thickness of the adjusting blocks, and the maintenance time is greatly shortened.

The invention discloses a superfine grinding and cooling process for producing a kaolin raw material. The superfine grinding and cooling process comprises the following steps: (1) pulping; (2) front-section wet grinding; (3) cooling: pumping the slurry A in the step (2) into a cooling tower for cooling through a slurry pump at the flow rate of 30-70m < 3 > / h to obtain slurry B with the temperature of 30-45 DEG C and the mass concentration of 35-45%; and (4) carrying out rear-section wet grinding. The superfine grinding and cooling process for producing the kaolin raw material has the beneficial effects that the particle collision requirement of superfine grinding is met, the consumption of a dispersing agent is reduced due to low temperature, the total consumption of the dispersing agent is finally reduced, the use cost of the raw material is further reduced, the service life of rear-section wet grinding equipment is prolonged, the maintenance cost is reduced, and the service life of the kaolin raw material is prolonged. And the granularity D92 of the slurry is less than 2 microns, less impurities are introduced, and the qualified rate of the product is more than 95%.

The application provides a slurry pump flow passage component life monitoring system, belonging to the technical field of slurry pump monitoring, comprising a monitoring unit, a gap adjusting unit and a control unit, the monitoring unit comprising a plurality of first ultrasonic sensors arranged on a front guard plate and facing an impeller, for emitting, receiving and generating sound wave data; the gap adjusting unit is used for driving the impeller to move axially to adjust the flow passage gap between the impeller and the front guard plate; the control unit is electrically connected with the first ultrasonic sensors and the gap adjusting unit, receives the sound wave data to calculate the real-time value of the residual wall thickness of the front guard plate and the flow passage gap, and controls the gap adjusting unit to adjust the flow passage gap to a preset minimum threshold value when the real-time value exceeds the maximum value of the gap range threshold value. The slurry pump flow passage component life monitoring system provided by the application realizes real-time monitoring of the wear state of the flow passage component, life judgment and intelligent adjustment of the gap under normal operation of the slurry pump, and forms a complete monitoring and adjustment closed loop.

The utility model relates to the technical field of pipeline desilting, and discloses a desilting device of a drainage pipe network, which comprises a pontoon part and a high-pressure nozzle part arranged at the front end of the pontoon part, two ends of the pontoon part are connected with traction ropes, and the traction rope at the front end is connected with a winding device on the ground. The floating pontoon part is dragged and driven by the winding device to move in the pipeline, traction force is sufficient, meanwhile, the traction rope at the rear end is connected with the booster pump parts, the booster pump parts are connected through the pipeline, the booster pump parts close to the floating pontoon part are connected with the slurry pump through the pipeline, and the pipeline between inspection wells with large intervals can be dredged; and the booster pump part is arranged to ensure sufficient pumping force, sludge in the pipeline is conveniently pumped to the ground, the efficiency is greatly improved, the high-pressure nozzle part is arranged at the front end of the floating boat part, and the high-pressure nozzle part can scatter a sludge layer in the pipeline, so that the slurry pump can better perform sludge suction operation, and the dredging effect on the pipeline is improved.

The utility model relates to the technical field of slurry pumps, and discloses a slurry pump capable of preventing an impeller from being blocked, which comprises a pump body, the impeller is rotatably connected in the pump body, the left side of the impeller is connected with a mounting piece through a fixing assembly, a sealing assembly is arranged between the impeller and the mounting piece, the left side of the mounting piece is fixedly connected with a plug connector, and the plug connector is fixedly connected with a plug connector. A connecting piece is arranged on the left side of the inserting piece, connecting grooves are formed in the outer wall of the connecting piece and the outer wall of the inserting piece, and the connecting piece and the inserting piece are fixedly connected by inserting fixing screws into the connecting grooves. According to the utility model, through the cooperation of the extrusion plate, the spring, the fixing bolt and the like, the sealing ring II and the sealing ring III can be tightly fixed, particles are effectively prevented from entering the connecting part of the mounting piece and the impeller, the blocking condition of the impeller is effectively reduced, the impeller mounting mode is relatively simple and convenient to operate, all parts are tightly and stably connected, and the pump body can be kept in a good closed state; the efficient slurry treatment process is ensured.

The application relates to the technical field of pipeline cleaning, and aims at the problem that concrete accumulations affect the drainage of drainage pipelines, and provides a municipal drainage pipeline foreign matter breaking and cleaning device under complex geological conditions, which comprises a movable chassis, a breaking assembly and a cleaning assembly; the breaking assembly comprises a plurality of high-pressure water guns arranged at the front end of the movable chassis; the cleaning assembly comprises a slurry pump arranged on the movable chassis; the slurry pump is connected with a water inlet pipe and a water outlet pipe; the water inlet pipe extends out of the front end of the movable chassis and is vertically arranged downwards. The application has the effect of conveniently cleaning the concrete accumulations in the drainage pipelines.

The utility model relates to the technical field of slurry pumps, and provides a movable slurry pump unit base which comprises a base body, a slurry pump body, a sliding fixing mechanism, a sliding moving mechanism, a supporting column, a springback damping mechanism, a lifting protection mechanism and a rotating supporting mechanism. A sliding fixing mechanism is arranged on the outer side wall of the base body, two sliding moving mechanisms are arranged at the bottom of the base body, four supporting columns are fixedly connected to the tops of the sliding fixing mechanisms in a rectangular shape, a springback damping mechanism is arranged on the tops of every two supporting columns, and the lifting protection mechanisms are arranged on the outer side walls of the two supporting columns. And a plurality of rotary supporting mechanisms are arranged on the sliding fixing mechanism. By means of the technical scheme, the problems that in the prior art, a slurry pump vibrates in the transportation process, the fastening assembly is loosened, the slurry pump topples over, and the working time and the service life of the slurry pump are affected are solved.

The invention relates to the technical field of ceramic materials, and provides a high-strength protective plate for a ceramic slurry pump and a preparation method of the protective plate. The invention discloses a high-strength ceramic protection plate for a slurry pump. The high-strength ceramic protection plate comprises the following raw materials in parts by weight: 85-95 parts of silicon carbide, 3-5 parts of modified silicon carbide whiskers, 4-6 parts of petroleum coke powder, 6-8 parts of a binder, 3-8 parts of a sintering aid, 3-5 parts of a dispersant and 50-60 parts of water. Wherein the modified silicon carbide crystal whiskers are obtained by modifying silicon carbide crystal whiskers with 3-amino-2-hydroxyacetophenone. According to the technical scheme, the problem that the strength of the ceramic slurry pump protection plate is insufficient in the prior art is solved.

The application discloses a novel onshore slurry conveying relay pump station arrangement structure, which comprises a slurry pump working area, an auxiliary sealing water pump working area, a daily power station equipment area, a flocculant preparation area, a slurry flocculation and precipitation area, a seawater desalination area and a concentrated slurry treatment / drying area, wherein the slurry pump working area is located on one side of the whole station, the auxiliary sealing water pump working area is adjacent to the slurry pump working area, the daily power station equipment area is located on the other side of the station, the flocculant preparation area is adjacent to the daily power station equipment area, the slurry flocculation and precipitation area is located in the center of the station, the seawater desalination area is located between the slurry pump working area, the auxiliary sealing water pump working area and the daily power station equipment area, and the concentrated slurry treatment / drying area is on the same side of the daily power station equipment area. The application has the characteristics of strong adaptability to engineering environment, convenience, water saving and environmental protection, and the like, and each functional area is arranged reasonably, and no external power supply and additional fresh water supplement are needed in actual use.

The utility model provides a solid-liquid mixed material conveying system which comprises a material storage tank, a discharging control unit, a power conveying unit and a gas-liquid separation tank and is used for realizing gas-liquid separation and water distribution, and a dehydration unit conveys separated water to the gas-liquid separation tank; the pressure monitoring and control unit is used for controlling the outlet pressure of the slurry pump; the water storage tank is used for receiving the return water from the gas-liquid separation tank, storing water and supplementing water for the conveying process of the solid-liquid mixture; the water inlet pipe is used for conveying desalted water to the water storage tank. The discharging control unit stably controls the water level of the material storage tank. And parts associated with the centrifugal dehydrator, the gas-liquid separation tank, the water storage tank and the like perform own functions, so that water resource recycling, gas-phase pressure balance and liquid level stability are realized. By means of the whole system, stable, efficient and energy-saving conveying of nylon 6 slices from the low position to the high position can be achieved, a foundation is built for efficient and stable polymerization production of nylon 6, and the industrial application value is high.

The present application relates to material crushing and drying technical field, specifically to a kind of slurrying steam flow crushing and drying machine, including sequentially interconnected storage cylinder, heater, air grinder and drying collector, storage cylinder is connected with inlet slurry pump and inlet slurry pipe, inlet slurry pump is connected storage cylinder and heater by inlet slurry pipe, to send material in storage cylinder into heater and heat;Air grinder includes shell, main shaft, rotating target, multiple la val nozzles, grading screen and the first drive mechanism for driving main shaft rotation, main shaft is rotatably longitudinally arranged in shell, and main shaft is worn fixed rotating target and grading screen, grading screen is located above rotating target, multiple la val nozzles are arranged around the side of rotating target, and each la val nozzle is connected with the outlet of heater via steam slurry pipe;The position of shell above grading screen is provided with discharge port, discharge port is connected with drying collector via discharge pipe, and drying collector is provided with exhaust mechanism for exhausting discharge pipe.Energy saving and low cost, high crushing efficiency.

The invention belongs to the technical field of nuclear power, and particularly relates to a geological drilling rig water brake adjusting system and method. According to the system, the slurry pump spraying water pump is connected with the drilling machine water brake, so that the slurry pump spraying water pump has two purposes, the water brake system of the drilling machine does not need to be independently connected with the water pump again, and conciseness and high efficiency of a drilling production site are achieved. In addition, a three-way valve and a throttling valve are arranged in a circulating system, the flow of the system is adjusted, the purpose of adjusting the water brake descending speed is achieved, the drilling tool descending speed is increased, and the safety in the drilling tool descending process is effectively guaranteed.

The present application relates to the field of plunger pump, disclose a kind of slurry separation structure and plunger slurry pump, including pump body, flow guide pipe is equipped in pump body, the middle part of flow guide pipe is equipped with the isolation ring that follows plunger movement and moves up and down with action.Pumper upper part side end is equipped with plunger channel with medium oscillation cavity communication, plunger channel is connected with packing box, packing box is equipped with plunger, which can reciprocate transversely in plunger channel, flow guide pipe is located outside the lateral of plunger activity range.The present application can separate slurry medium, and effectively avoid the full turbulence of backwash medium and slurry medium, and plunger can be removed from the front end of pump body for maintenance, due to the existence of turbulence isolation ring, effectively shorten the size of pump body, improve the reliability of pump, maintainability, reduce manufacturing cost and improve the service life of spare parts.

The utility model discloses a concentrate recycling water return system, which relates to the technical field of mining equipment and comprises a water pipe network and a recycling water tank. The flushing water treatment system comprises a pressure pump, a collecting ditch, a branching pipeline, a concentrate thickener water tank, a stirring tank, a pipeline body, a stirring paddle, a slurry pump, an electromagnetic valve and dehydration equipment, one end of the pressure pump is connected with the recycling water tank, the other end of the pressure pump is connected with a water pipe network through a pipeline, one end of the branching pipeline is connected with the concentrate thickener water tank, and the other end of the branching pipeline is connected with the stirring tank. The liquid level of the recycling water tank is automatically controlled through an electromagnetic valve with a liquid level adjusting mechanism, it is ensured that the water level of the water tank is stabilized within a proper range, stable operation of the system is guaranteed, and the situation of water overflowing or water shortage is avoided. Quick connectors and water guns are arranged on pipelines laid on the car washing platform at intervals, so that washing water is convenient to take and use.

The invention relates to the technical field of mud-water separation, in particular to a mud-water separation device which comprises a first cyclone, a first vibrating screen and a first water tank, the first cyclone comprises an underflow opening, and the underflow opening of the first cyclone is connected with the feeding end of the first vibrating screen; a notch of the first water tank is connected with the discharging end of the first vibrating screen in a bearing mode, and a pipeline of the first water tank is connected with the feeding end of the first cyclone. A first vibrating screen is connected below an underflow port of a first cyclone, and underflow slurry discharged from the underflow port of the first cyclone is dehydrated and filtered by the first vibrating screen; the first vibrating screen and the second vibrating screen are arranged, so that coarse-particle mud and sand are obtained on the screen surface of the first vibrating screen, fine-particle mud and sand discharged from the underflow port by mistake enter the first water tank along with water and are mixed with to-be-treated slurry, then the slurry in the first water tank is pumped into the first cyclone by the slurry pump to be screened, and waste of overflow slurry is reduced.

The present application belongs to the field of centrifugal pump, and particularly relates to a mounting method of a slurry pump, which comprises seven steps, i.e. firstly fixing a bearing body assembly to a bracket body and installing an adjusting screw, then fixing a pump body to the bracket body, then measuring the round run-out of an inner hole and an end face of the pump body and requiring to meet the requirements, then opening two positioning pin holes at a connecting part, then installing a sealing assembly, a secondary impeller and a rear backplate, then installing a primary impeller, then installing a sheath and a front backplate, then installing an inlet cone pipe outside a pump cover and connecting and fixing by fastening bolts, and finally adjusting the gap between the primary impeller and the front backplate, fastening the sealing assembly, fastening the primary impeller, and performing disc checking without friction; the present application correctly installs the slurry pump, improves the qualified rate of one-time trial, and thus improves the service life of the pump.

The invention discloses multi-channel shunting pile side uniform grouting equipment which comprises a grout box, a first grout pump is arranged at a grout outlet of the grout box, and two sets of main grouting pipes are arranged at a grout outlet of the first grout pump. The grouting device further comprises a second slurry pump fixedly arranged on the slurry box and a secondary grouting pipe fixedly arranged on a slurry outlet of the second slurry pump. Through cooperation of the first backflow pipe, the second backflow pipe and the pressure confrontation assembly, the effect of comparing the intensity of pressure in the two main grouting pipes is achieved; the force clinker in the two telescopic flexible metal corrugated pipes can be directly observed through a second limiting block and a first limiting block, and the effect of conducting the force of slurry in the telescopic flexible metal corrugated pipe of the stronger side in the pressure confrontation assembly is achieved through the force conduction assembly. And through cooperation of a rectangular limiting pipe, a first toothed plate, a gear and a second toothed plate, the effect that the moving directions of the second toothed plate and the first toothed plate are opposite is achieved.

The utility model belongs to the technical field of tunnel advance support grouting, and discloses an advance small guide pipe high-speed grouting device for a tunnel, which comprises a grout barrel, a grout pumping assembly and a quick connector, the quick connector comprises an outer sleeve ring, an inner grouting pipeline and a pipeline sealing assembly, the inner grouting pipeline is arranged in the outer sleeve ring, and the pipeline sealing assembly is arranged in the inner grouting pipeline. The outer sleeve ring is sleeved on the outer wall of the advanced small guide pipe, the inner grouting pipeline extends into the advanced small guide pipe, and a pipeline sealing assembly is arranged between the outer sleeve ring and the inner grouting pipeline. The structure design is compact and reasonable, the grouting pipeline can be quickly fixed on the advanced small guide pipe, thread sealing connection is not utilized, the mounting and dismounting speed is high, and the construction efficiency is high. Compared with a threaded tight joint structure, the pressure bearing capacity is high, the grouting speed can be greatly increased, grouting operation can be carried out on advanced small guide pipes of different sizes by replacing connectors of different sizes, use is convenient, practicability is high, the connecting and dismounting speed is high, and the advanced support construction efficiency can be greatly improved.

The utility model discloses a device for recovering p-hydroxyphenylglycine from centrifugal mother liquor, and belongs to the technical field of chemical production devices and mother liquor recovery. The device is formed by combining a mother liquor deposition tank, a slurry pump, an upper rotary control valve, a lower rotary control valve, a baffle plate, a jet flow nozzle, a centrifugal machine and the like, the innovation point of the technical scheme of the utility model is as follows: by utilizing the power generated by the slurry pump, materials in the mother liquor deposition tank are pushed to rotate and turn over by mother liquor sprayed by the high-low staggered jet nozzles, so that deposited p-hydroxyphenylglycine crystals float upwards; then feeding the para-hydroxyphenylglycine centrifugal mother liquor with suspended crystals into a centrifugal machine by virtue of a slurry pump for centrifugal separation, so as to achieve the purpose of efficiently recovering the para-hydroxyphenylglycine crystals; according to the technical scheme, the problem that crystals are not easy to turn up after standing and depositing is solved, and the problem that mechanical stirring is not easy to add due to large span of a mother liquor depositing tank is solved; the device also has the characteristics of convenience in operation, simplicity and high efficiency.

The utility model relates to the technical field of slurry pump sealing, in particular to a novel mechanical seal of a slurry pump, which comprises a shaft body, an equipment shaft sleeve is mounted outside the shaft body, a mechanical seal shaft sleeve is mounted outside the equipment shaft sleeve, and a spring seat is nested outside the mechanical seal shaft sleeve. A first movable ring and a second movable ring which are arranged outside the mechanical seal shaft sleeve in a sleeving mode are arranged on the two sides of the spring seat, two sets of compression springs are installed on the two sides of the spring seat, and the outer circle of the first movable ring and the outer circle of the second movable ring are installed in the spring seat in a sliding mode. The sealing structure has the beneficial effects that the first gland and the second gland are installed together to achieve mechanical sealing, mechanical sealing is formed through rotating running-in of the movable ring and the static ring, the double-sealing structure can be provided with a cooling liquid cavity outside the movable ring base, cooling liquid flowing circularly is used for cooling the sealing structure, and the service life is prolonged; a threaded groove is formed outside the movable ring seat, a threaded pump can automatically drive cooling liquid to circularly flow in the process that the movable ring seat rotates along with the movable ring, and the cooling effect is guaranteed.