30results about How to "Guaranteed normal pumping" patented technology

The invention provides a plugging bearing material for petroleum drilling, and a preparation method and application thereof. The plugging bearing material comprises the following components: 900 to 1,200 kilograms of bentonite, 100 to 220 kilograms of magnesium oxide, 90 to 160 kilograms of fly ash, 0 to 80 kilograms of hardness regulator, 90 to 210 kilograms of compression resisting agent, 0.15 to 5.8 kilograms of hydrophilic surfactant, 8.3 to 13.0 kilograms of hydrophobic surfactant and 3 to 8 kilograms of water-soluble organic high polymer material. A plugging material formed by the plugging bearing material has high fracture plugging capability, and a plugging belt formed by the plugging bearing material plays a certain stable role in fracturing rocks. The plugging bearing material, and the preparation method and the application thereof are suitable for processing formation leakage of various forms.

The invention discloses a fiber reinforced cement-based material (ECC) for 3D printing, preparation, performance evaluation and an application. The cement-based material is prepared by taking sulfatealuminum cement produced by industrial solid wastes fully as an early strength agent and doping polyethylene fiber relatively high in tensile strength and modulus. The cement-based material is introduced to 3D printing concrete and is applied to building 3D printing and a concrete structure or ribless construction of a member or pouring of the concrete structure, has the characteristics of strainstrengthening and multi-crack cracking under action of stretching and bending, has high ductility and high energy consumption, and solves the problem that a 3D printing concrete member is low in mechanical property. The fiber reinforced cement-based composite material is simple in preparation method, low in cost and low-carbon and environment-friendly, and has certain engineering demonstration meaning and social benefits. The invention also provides a 3D printing performance evaluation method of the material, including micro slump test, flowability test and rheological property test.

The invention discloses a multifunctional toilet. The multifunctional toilet comprises a water tank, a toilet base and a toilet cover, wherein a retainer ring with the upper end which is provided with an opening is arranged on the inner wall of the toilet base; a first pipeline is arranged at the lower part of the retainer ring and is connected to a urine recycling device; a urine storage cavity and a water cavity are formed in the urine recycling device; the urine storage cavity and the water cavity are connected with each other through a second pipeline; a reverse osmosis membrane is also arranged between the urine storage cavity and the water cavity; a pressing device is arranged in the urine storage cavity; a third pipeline is arranged in the water cavity and is used for discharging water. The multifunctional toilet has the beneficial effects that 1) the urine and the excrement can be conveniently separated; 2) the water in the urine can be reused, and water can be saved.

An indoor water-saving humidifying air purifier comprises a main body, wherein the main body is provided with an air inlet and an air outlet, and an induced draft fan, an air inlet cavity, a purification cavity and an air outlet cavity are arranged in the main body. The indoor water-saving humidifying air purifier is characterized in that an ultraviolet tube is arranged in the purification cavity, an ultraviolet lamp is arranged in the ultraviolet tube, a stop block is arranged between the outer wall of the ultraviolet tube and the inner wall of the purification cavity, the upper end of the purification cavity is provided with a water tank, the bottom of the water tank is provided with a plurality of water-seeping fibers in a penetrating mode, the water-seeping fibers extend to penetrate through the whole purification cavity, and a container is arranged at the bottom of the purification cavity. A filter partition plate is arranged in the container to divide the container into an upper chamber and a lower chamber. The wall of the lower chamber is provided with a water outlet. The main body is further provided with a water pump and a water pipe connected with the water pump. The water pipe is communicated with the water outlet and a water inlet on the water tank. The indoor water-saving humidifying air purifier has a good dust removal effect and can remove fine dust by adsorbing the dust through water; besides, the water consumption is small, and waste of water resources is avoided.

The invention discloses an automatic opening, adding and dissolving liquid supply system for upright soft bag powder. The liquid supply system comprises a temporary storage assembly, a discharging assembly, a transferring assembly, a bag opening assembly, a liquid preparation assembly, a recycling assembly and a liquid storage assembly. Powder bags sequentially pass through the temporary storage assembly, the discharging assembly, the transferring assembly, the bag opening assembly, the liquid preparation assembly, the recycling assembly and the liquid storage assembly to complete the actionsof powder transportation, temporary storage, transferring, clamping, bag opening, discharging, liquid preparation, liquid storage and bag body recycling, so that the whole process of the liquid supplysystem is automatic, and only manual participation is needed during bag placing; the automation level of equipment is effectively improved, dependence on personnel is reduced, liquid preparation andimmediate preparation can be directly carried out after a powder bag package is opened, the quality of liquid medicine is effectively guaranteed, meanwhile, powder can be prevented from being polluted, the equipment is prevented from being corroded by the powder, the maintenance cost of the equipment is reduced, the service life of the equipment is effectively prolonged, and good application prospects are realized.

The invention belongs to the field of petroleum and natural gas well cementation projects and particularly relates to an oil well cement sedimentation stabilizer suitable for oil and gas well cementation, a preparation method thereof and a cementing slurry. The oil well cement sedimentation stabilizer contains structural unit A shown as formula (I), structural unit B shown as formula (II) and structural unit C shown as formula (III). The molar ratio of the structural units A, B and C is x:y:z=1:(0.07-0.22):(0.03-0.11); in the formulas, R1, R2 and R3 are H, or C1-C4 is substituted or non-substituted alkyl group, and m is 15, 17, 19 or 21. The oil well cement sedimentation stabilizer allows zero thickening at low temperature and thickening at high temperature; the problem that the cementingslurry settles and loses stability is effectively solved.

The invention discloses a sealing against applied to the bottom of a deep flexible waterproof curtain, and preparation and pouring methods thereof. The sealing agent comprises modified bentonite and clay, wherein the modified bentonite is sodium bentonite modified by polyionic cellulose. The sealing agent applied to the bottom of the deep flexible waterproof curtain and the preparation and pouringmethods thereof can realize filling of soil cracks with the sealing agent and complete filling of the bottom of the flexible waterproof curtain, effectively block underground water, solve the problemof leakage of a polluted medium below the flexible waterproof curtain, are suitable for sealing the bottom of the flexible waterproof curtain which is 0-40m deep or deeper, and are especially suitable for sealing the bottom of the deep flexible waterproof curtain which is 20-40 m deep or deeper. The materials of the sealing against are easy to obtain, and the preparation and pouring methods of the sealing agent are convenient and easy.

A multifunctional water-saving air purifier comprises a body which is provided with an air inlet and an air outlet, and the body is internally provided with an air draft fan, an air inlet cavity, a purification cavity and an air outlet cavity. The multifunctional water-saving air purifier is characterized in that an ultraviolet tube is installed in the purification cavity, an ultraviolet lamp is installed in the ultraviolet tube, a stop block is installed between the outer wall of the ultraviolet tube and the inner wall of the purification cavity, the upper end of the purification cavity is provided with a water tank, a plurality of water seepage fibers are installed at the bottom of the water tank in a penetrating mode and extend to penetrate through the whole purification cavity, and a container is installed at the bottom of the purification cavity. The container is divided into an upper chamber and a lower chamber through a filtering partition plate arranged in the container, the wall of the lower chamber is provided with a water outlet, the body is further provided with a water pump and a water pipe connected with the water pump, and the water pipe is communicated with the water outlet and a water inlet in the water tank. The multifunctional water-saving air purifier has a good dust removal effect, is capable of removing tiny dust through water adsorption and low in water consumption, and avoids waste of water resources.

The invention discloses a concrete pumping device and relates to the technical field of construction equipment. The concrete pumping device comprises a stirring hopper, wherein a storage hopper is fixed at the top end of the inner wall of the stirring hopper through a first connecting rod; two first discharge holes are formed in the bottom end of the stirring hopper; two guide tubes are communicated with bottom ends of the two first discharge holes; allocation mechanisms are fixed on peripheral side surfaces of the two guide tubes; two second discharge holes are formed in the bottom end of thestorage hopper; external rotor motors are fixed on peripheral side surfaces of the second discharge holes through second connecting rods; conical plates are fixed on peripheral side surfaces of the external rotor motors; and a pressure sensor is fixed on one surface of each conical plate. Due to the structural design of the stirring hopper, the conical plate and the storage hopper, pressure of concrete pressing down on the surfaces of the conical plates is recorded by using the pressure sensor, the content of cement in the concrete is monitored in real time, the phenomenon that a tube is blocked as the content of the cement in the concrete is too high or too low is avoided, and continuous concrete pumping is ensured.

The invention discloses a multifunctional toilet. The multifunctional toilet comprises a water tank, a toilet base and a toilet cover, wherein a retainer ring with the upper end which is provided with an opening is arranged on the inner wall of the toilet base; a first pipeline is arranged at the lower part of the retainer ring and is connected to a urine recycling device; a urine storage cavity and a water cavity are formed in the urine recycling device; the urine storage cavity and the water cavity are connected with each other through a second pipeline; a reverse osmosis membrane is also arranged between the urine storage cavity and the water cavity; a pressing device is arranged in the urine storage cavity; a third pipeline is arranged in the water cavity and is used for discharging water. The multifunctional toilet has the beneficial effects that 1) the urine and the excrement can be conveniently separated; 2) the water in the urine can be reused, and water can be saved.

The invention relates to an air purifier with a water circulation function. The air purifier comprises a main body which is provided with air inlets and air outlets, wherein the main body is internally provided with an induced draft fan, an air inlet cavity, a purification cavity and an air outlet cavity; the purification cavity is internally provided with a water storage pipe; the upper end of the water storage pipe is provided with a water tank; a plurality of check blocks are arranged between the outer wall of the water storage pipe and the inner wall of the purification cavity; the plurality of check blocks are connected with the outer wall of the water storage pipe and the inner wall of the purification cavity alternately; the check blocks are respectively provided with water seepage holes in the parts at which the check blocks are connected with the outer wall of the water storage pipe, and the water in the water storage pipe can seep through the water seepage holes; a plurality of water seepage fibers are arranged at the bottom of the water tank in a penetrating way and extend and pass through the whole purification cavity; the bottom of the purification cavity is provided with a container; the container is internally provided with a filter spacer plate and is divided into an upper chamber and a lower chamber by the filter spacer plate; the wall of the lower chamber is provided with a water outlet; the main body is also provided with a water pump and a water pipe connected with the water pump; the water pipe is communicated with the water outlet and a water inlet formed in the water tank. The air purifier has good effects of removing dust and humidifying, and is capable of saving water.

The multifunctional water-saving air purifier includes a main body. The main body is provided with an air inlet and an air outlet. The inside of the main body is provided with a suction fan, an air inlet chamber, a purification chamber, and an air outlet chamber. It is characterized in that the The purification chamber is provided with an ultraviolet tube, which is provided with an ultraviolet lamp, and a stopper is provided between the outer wall of the ultraviolet tube and the inner wall of the purification chamber. The fiber extends through the entire clean chamber, and a container is arranged at the bottom of the clean chamber. The container is provided with a filter partition to divide the container into upper and lower chambers, the wall of the lower chamber is provided with a water outlet, the main body is also provided with a water pump and a water pipe connected with the water pump, and the water pipe communicates with the Water outlet and water inlet on the sink. The invention has good dust removal effect, can remove fine dust through water adsorption, and has small water consumption, thereby avoiding the waste of water resources.

The invention relates to the technical field of mine flood accident emergency rescue, in particular to a mine trackless inclined shaft floating pump type emergency drainage system and a mounting method. A floating pump is suspended in water through a support and a floating boat, is pushed by a hard metal pipeline, a main pump and a matched pipe valve which are sequentially connected behind a water outlet of a floating pump along the gravity component of a slope;, a condition of rolling along the slope is created by a pipe supporting rubber wheel pair, a pump supporting truck and an emergency light rail, traction tension and rope outlet speed are controlled by a mining double-speed winch, a movable pulley block and a steel wire rope, so that the floating pump synchronously descends along with the water level at a low speed, a soft pipeline and a slow closing valve are connected behind a water outlet of the main pump in a matched mode, and a water source is safely conveyed at a long distance. Operation and monitoring of the floating pump and the main pump are guaranteed through power supply and distribution equipment, and voice communication devices are arranged at key points in a serialized mode to assist efficient linkage operation. According to the mine trackless inclined shaft floating pump type emergency drainage system, an integrated matching process technology solution and an optimally matched equipment system for lightweight and rapid construction of the trackless inclined shaft emergency drainage system are formed.

The invention relates to the technical field of saline-alkali soil improvement, in particular to a novel saline-alkali soil improvement system and method. The novel saline-alkali soil improvement system comprises a device body, wherein the device body comprises a water storage tank body, the right end of the water storage tank body is fixedly connected with a water pump, a first connecting pipeline is fixedly connected to the left end of the water pump, and the first connecting pipeline is inserted into the water storage tank body; a second connecting pipeline is fixedly connected to the right end of the water pump, a spray head is fixedly connected to the bottom end of the second connecting pipeline, and a fixing mechanism is arranged at the bottom end of the first connecting pipeline and comprises a first connecting rod. According to the novel saline-alkali soil improvement system and method, the problem that in order to ensure uniform irrigation of saline-alkali soil, the saline-alkali soil is irrigated generally through a plurality groups of nozzles, but when a traditional water pump pumps water in a water storage tank, impurities are likely to enter a pipeline, and consequently the pipeline is blocked is solved; normal water pumping of the first connecting pipeline is ensured, and blockage in the first connecting pipeline is avoided.

The invention discloses a marine domestic sewage storage cabinet. The marine domestic sewage storage cabinet comprises a cabinet body and a crushing and discharging pump, a circulating suction port communicates with a pump inlet of the crushing and discharging pump, a circulating injection port communicates with a pump outlet of the crushing and discharging pump, a discharging port further communicates with the pump outlet of the crushing and discharging pump, and a liquid level controller is further arranged on the cabinet body; the inner side plate surface of a wall plate of the cabinet bodyis plated with a zinc coating, the zinc coating is coated with an epoxy asphalt paint layer, the outer side plate surface of the wall plate of the cabinet body is coated with an anti-corrosion primerlayer, and the anti-corrosion primer layer is coated with an anti-corrosion finish paint layer; a liquid level window is arranged on the cabinet body, the liquid level window comprises mirror surfaceglass and visual glass, the mirror surface glass and the visual glass are clamped at the position of a wall plate window hole of the cabinet body through a window clamping plate, and a floating fluorescent floating ball is arranged in a clamping cavity formed by the mirror surface glass and the visual glass. The marine domestic sewage storage cabinet has the advantages of high sewage corrosion resistance and convenience and accuracy in water level observation.

The invention relates to a urea solution atomizing spray gun which comprises a first air inlet pipe, a sealing pipe, a liquid inlet pipe, an outer guide pipe, an inner guide pipe, an atomizing block and a spray head, one end of the sealing pipe is connected with the first air inlet pipe, the other end of the sealing pipe is connected with the atomizing block, and the first air inlet pipe and the atomizing block are matched to form a conical cavity; the liquid inlet pipe is communicated with the conical cavity, one end of the outer guide pipe is connected with the atomization block, the other end of the outer guide pipe is connected with the spray head, the inner guide pipe is located in the outer guide pipe, an outer cavity is formed between the inner wall of the outer guide pipe and the outer wall of the inner guide pipe, the second air inlet pipe is communicated with the outer cavity, and the second air inlet pipe is communicated with the spray head. The inner catheter comprises an inner cavity, and the first air inlet pipe and the conical cavity are communicated with the inner cavity. By adopting the Venturi effect, local vacuum appears when compressed air and a urea solution are mixed in the conical cavity, the compressed air is prevented from entering the liquid inlet pipe, and normal use of the urea gun is guaranteed.

An indoor air dust collector allowing water circulation comprises a body provided with an air inlet and an air outlet; a suction fan, an intake cavity, a purifying cavity and an exhaust cavity are arranged inside the body; a water storage pipe is disposed inside the purifying cavity; a water tank is disposed at the upper end of the water storage pipe; a plurality of stoppers are disposed between the outer wall of the water storage pipe and the inner wall of the purifying cavity; the stoppers are alternately connected with the outer wall of the water storage pipe and the inner wall of the purifying cavity; the stoppers connected with the outer wall of the water storage pipe are provided with leak holes, admitting leakage of water from inside of the water storage pipe, at the connections; a plurality of seeping fibers penetrate the bottom of the water tank and penetrate the whole purifying cavity; a container is arranged at the bottom of the purifying cavity. A filter partition disposed inside the container divides the container into an upper chamber and a lower chamber. The wall of the lower chamber is provided with a water outlet. The body further comprises a water pump and a water pipe connected with the same. The water outlet is communicated with a water inlet of the water tank through the water pipe. The indoor air dust collector has effective functions of dust collection and humidification and saves water.

The invention discloses a self-purification water well with a two-stage precipitation function. The self-purification water well comprises a seepage well, a pumping well and a water pump box, whereinthe seepage well is buried in a soil layer, the right side of the seepage well is provided with the pumping well, the top of the pumping well is arranged above the soil layer, the water pump box is supported by the top of a seepage well cover, a half of the water pump box is buried in the soil layer, multiple water overflow holes are formed in a position where the pumping well is connected with the side wall of the seepage well, a water overflow buoy is clamped in the inner wall of the seepage well in a sliding mode, a connecting rod is fixed on the bottom surface of the water overflow buoy, multiple sliding rods are horizontally fixed on a rod wall of the right side of the connecting rod, a blockage plate is sleeved on the rod wall of each sliding rod, a precipitating slant slope is fixedon a right side wall inside the pumping well, the bottom in the pumping well is provided with a pumping head which is fixed on the bottom surface of a pumping buoy, the top surface of the pumping buoy is connected with a threaded expansion pipe, and the threaded expansion pipe is connected with the pumping end of a water pump through a pumping pipe. The self-purification water well can be used for realizing the self-purification function on turbid well water.

The invention relates to the technical field of aquatic ecological restoration and purification equipment, in particular to a river aquatic ecological restoration purification device which comprises fixing frames fixed to the two sides of a river, a top frame is fixedly connected to the top ends of the two fixing frames, a planting plate is installed in the top frame, and a through groove penetrating front and back is formed in the bottom end of the top frame. Sliding grooves are formed in the left end and the right end of the through groove correspondingly, a plurality of first water collecting tanks are slidably arranged in the two sliding grooves, second water collecting tanks are arranged on the front sides and the rear sides of the first water collecting tanks correspondingly, and connecting grooves are formed in the bottom side of the right end of the second water collecting tank located on the left side and the bottom sides of the right ends of the first water collecting tanks correspondingly; the bottom side of the left end of the second water collecting tank located on the right side and the bottom sides of the left ends of the multiple second water collecting tanks communicate with connecting pipes. The device can ensure that aquatic plants are always in contact with water, the survival rate of the aquatic plants is ensured, the water remediation effect is ensured, water at different depths in a river can be conveniently remedied and purified, and the use limitation of the device is reduced.

The invention discloses an intelligent domestic sewage pretreater. The intelligent domestic sewage pretreater comprises a cabinet body and a crushing discharge pump, wherein the inner side plate surface of a wall plate of the cabinet body is plated with a zinc coating; the zinc coating is coated with an epoxy asphalt paint layer; the outer side plate surface of the wall plate of the cabinet body is coated with an anti-corrosion primer layer and an anti-corrosion finish paint layer; three liquid level controllers are arranged on the cabinet body at intervals in the height direction; a liquid level sensor is fixedly arranged in a pipe cavity of a sensor guide pipe; the sensor guide pipe is movably sleeved with a liquid level floating ball; a liquid level magnet is fixedly installed in a ballcavity of the liquid level floating ball; a liquid level window is arranged on the cabinet body; the liquid level window comprises mirror surface glass and visual glass; the mirror surface glass andthe visual glass are clamped at the position of a wall plate window hole of the cabinet body through a window clamping plate; and a fluorescent floating ball which is floating is arranged in a clamping cavity formed by the mirror surface glass and the visual glass. The intelligent domestic sewage pretreater not only has relatively good sewage corrosion resistance, but also is sensitive and reliable in liquid level detection.

The invention discloses a heat supply heating sheet treatment and protection device for a building heat supply energy-saving device, which can realize smooth treatment on the inner wall of an inner hole of a heating sheet, and is coated with a layer of protection oil after treatment, so that the quality of the inner wall of the heating sheet is effectively improved, and the reliability and the service life of the heating sheet are ensured. When the inner cavity of the warm piece is treated, the abrasive particle supply and recovery mechanism supplies abrasive particles into the warm piece through the butt joint base, then the rotary driving mechanism drives the rotary base to rotate so that the inner wall of the warm piece can be treated, and after treatment is conducted for a period of time, the abrasive particles are recovered. The abrasive particle supply and recovery mechanism recovers abrasive particles from the interior of the heating piece through the butt joint seat, then the protective oil supply and recovery mechanism supplies oil to the interior of the heating piece through the butt joint seat, and then the rotary driving mechanism drives the rotary seat to rotate so that the inner wall of the heating piece can be protected. And finally, the protective oil supply and recovery mechanism recovers redundant protective oil in the heating sheet through the butt joint seat.

The invention discloses a domestic sewage pretreatment device with an electromagnetic liquid level meter. A cabinet body is provided with a circulating suction port and a circulating injection port, the circulating suction port is communicated with a pump inlet of a crushing discharge pump, the circulating injection port is communicated with a pump outlet of the crushing discharge pump, and the pump outlet of the crushing discharge pump is also communicated with a discharge port. The inner side plate surface of a wall plate of the cabinet body is plated with a zinc coating, the zinc coating iscoated with an epoxy asphalt paint layer, the outer side plate surface of the wall plate of the cabinet body is coated with an anti-corrosion primer layer, and the anti-corrosion primer layer is coated with an anti-corrosion finish paint layer. Three liquid level controllers are arranged on the cabinet body at intervals in the height direction, sensor guide pipes of the liquid level controllers are fixedly installed on the cabinet body, liquid level sensors are fixedly arranged in pipe cavities of the sensor guide pipes, the sensor guide pipes are movably sleeved with liquid level floating balls, and liquid level magnets are fixedly installed in ball cavities of the liquid level floating balls. The treatment device is high in sewage corrosion resistance and sensitive and reliable in liquid level detection.

The invention discloses a large-aperture flow-controllable siphon device. The siphon device comprises a siphon pipeline, a control device and a water injecting pipe, wherein the siphon pipeline is in an inverted U-shape and comprises a water inlet pipe and a water outlet pipe, and the water outlet pipe is longer than the water inlet pipe, so that the pipe opening of the water outlet pipe is lower than the pipe opening of the water inlet pipe; the control device comprises opening sealing rubber valves and operation rods which are connected with each other, and the opening sealing rubber valves used for sealing the pipe openings of the siphon pipeline and controlling the water flow of the water inlet pipe and the water flow of the water outlet pipe are located at two ports of the siphon pipeline; one operation rod is arranged on each of the water outlet pipe side and the water inlet pipe side of the siphon pipeline, opening and closing of the opening sealing rubber valves are controlled by the aid of lever structures, and the water flow of the water inlet pipe and the water flow of the water outlet pipe are adjusted; and the water injecting pipe comprises a ball valve and a water filling pipe, one end of the ball valve is connected with the water filling pipe, the other end of the ball valve is in seamless connection with a transverse end of the siphon pipeline, and the connection part is close to the water inlet pipe section of the siphon pipeline. The large-aperture flow-controllable siphon device adopting the structure has the advantages of being power-free, large in flow, simple to operate, low in production cost and low in labor intensity of workers.

The invention discloses a hydrophilic slump loss resistant mineral composite fiber granule and a preparation method thereof. The method comprises the steps of: 1) mixing hydrophilic mineral composite fiber with lignosulfonate to form a mixture; and 2) making the mixture of the hydrophilic mineral composite fiber and the lignosulfonate into mixture particles, thus obtaining the hydrophilic slump loss resistant mineral composite fiber granule. According to the hydrophilic slump loss resistant mineral composite fiber granule and the preparation method thereof provided by the invention, the composite fiber granule provided by the invention is added to conduct concrete stirring, not only effectively restrains the generation of concrete and mortar cracks, but also has the effects of toughening, reinforcing, and improvement of concrete durability, and can effectively retard the slump loss of concrete, thus guaranteeing the concrete workability. At the same time, the granule is convenient to realize automation of packaging and use and adding. The hydrophilic mineral composite fiber granule is dispersed among concrete coarse aggregate to ensure the dispersion effect in concrete.

The invention discloses a pressure control communication oil jacket annulus control valve. The pressure control communication oil jacket annulus control valve is characterized in that a positioning pin, a centralizing spring, a spring footstock, a sealing ball and a sealing ball seat form a centralizing springback device, the centralizing springback device is arranged in a sealing piston, one end of the centralizing spring is fixed on the positioning pin, and the other end of the centralizing spring is fixed on the spring footstock; the sealing ball is arranged between the spring footstock and the sealing ball seat, and the sealing ball is in tight sealing contact with the spring footstock and the sealing ball seat by means of elastic force of the centralizing spring. According to the pressure control communication oil jacket annulus control valve, rebound return of the sealing ball seat can be ensured in time, and opening and closing of a valve in a highly-deviated well are ensured; when a pump cannot normally establish pressure difference and work normally, the oil jacket annulus is closed in time, and normal pumping of fluid is guaranteed; in addition, solid particles are prevented from being deposited on the sealing ball seat, the sealing ball and a pump outlet, an oil pipe can be directly cleaned in a ground pressurization oil pipe reinjection mode, operation is convenient, machining mode is simple, and assembling is fast.

An indoor air dust collector allowing water circulation comprises a body provided with an air inlet and an air outlet; a suction fan, an intake cavity, a purifying cavity and an exhaust cavity are arranged inside the body; a water storage pipe is disposed inside the purifying cavity; a water tank is disposed at the upper end of the water storage pipe; a plurality of stoppers are disposed between the outer wall of the water storage pipe and the inner wall of the purifying cavity; the stoppers are alternately connected with the outer wall of the water storage pipe and the inner wall of the purifying cavity; the stoppers connected with the outer wall of the water storage pipe are provided with leak holes, admitting leakage of water from inside of the water storage pipe, at the connections; a plurality of seeping fibers penetrate the bottom of the water tank and penetrate the whole purifying cavity; a container is arranged at the bottom of the purifying cavity. A filter partition disposed inside the container divides the container into an upper chamber and a lower chamber. The wall of the lower chamber is provided with a water outlet. The body further comprises a water pump and a water pipe connected with the same. The water outlet is communicated with a water inlet of the water tank through the water pipe. The indoor air dust collector has effective functions of dust collection and humidification and saves water.