52results about How to "Reduce salvage costs" patented technology

The invention discloses a rotation-free pawl-type sliding sleeve with a ball seat capable of being taken out. The sliding sleeve comprises a sliding sleeve body, an inner sliding sleeve and a ball seat cylinder, wherein the sliding sleeve body is composed of an upper connector, an outer cylinder and a lower connector. The sliding sleeve body and the inner sliding sleeve are fixed through a shear nail, the inner sliding sleeve and the ball seat cylinder are fixed through a shear nail, a fluid outlet hole is formed in the upper portion of the outer cylinder, and a clamping spring hole is formed in the lower position of the middle of the inner wall of the outer cylinder. An annular switch clamping groove is formed in the inner wall of the upper portion of the inner sliding sleeve, a plurality of split pawl clamping grooves are formed in the inner wall of the middle of the inner sliding sleeve in the peripheral direction, and a clamping spring is installed on the outer wall of the middle of the inner sliding sleeve. A plurality of male pawls are arranged at the upper end of the ball seat cylinder in the peripheral direction, a plurality of female pawls are arranged on the inner side of the lower end of the ball seat cylinder in the peripheral direction, the male pawls are clamped into the split pawl clamping grooves, and a variable diameter ball seat is arranged in the ball seat cylinder. When the inner sliding sleeve moves to the lower end of the outer cylinder, the clamping spring on the inner sliding sleeve is clamped into the clamping spring hole in the outer cylinder. All base seat cylinders can be salvaged through non-rotating type tubular columns in a disposable mode, and a full through path is achieved.

The invention discloses a river cleaning boat which is not easy to wrap fish and shrimp cage, including the hull, An upper surface of that hull is fixedly connected with a deck, the front and rear sides of the hull are provided with fixed seats, A limit flow baffle plate is fixedly connected with that other end of the hydraulic lifting rod, A swivel tip plate is movably connected to that right side of the swivel pin, A lifting hanger is arrange at that left end of the upper side of the hull, A lifting device is arranged on that left side of the lifting rod, A hinge cylinder is symmetrically and fixedly connected with that middle part of the deck, A cable is arranged on the left side of the hinge barrel, A refuse tank is arranged in the middle of the hull, A garbage tank is movably connected with a garbage tank, left and right ends of the garbage tank are fixedly connected with a traction lifting ring, a water filtering network is fixedly connected with the lower side of the garbage tank, a communication pipe is fixedly connected with the bottom of the garbage tank, a pump machine is fixedly connected with the upper surface of the deck, an electric motor is fixedly connected with the interior of the ship, and a power device is arranged at the lower end of the left side of the ship. The invention has the advantages of simpler and more convenient removal of river surface garbage and convenience in moving and delivering garbage onto the shore.

The invention relates to a deoiling and scumming device for a sewage treatment plant. The deoiling and scumming device mainly comprises an open sewage treatment tank and is characterized in that one end of the sewage treatment tank is provided with a sewage inlet while the other end of the sewage treatment tank is provided with a water outlet; an oil scraping system is arranged at the top of the sewage treatment tank and formed by connection of a transmission support and an oil scraping comb connected with the transmission support. The deoiling and scumming device has advantages that a flow guide area can be set according to oil residue quantity, oil absorption felts are arranged in a flow guide area to realize oil isolation, a guide plate is lifted and rotates to a position above an oil residue collection tank along a set time after oil collection is finished, the guide plate is fixedly connected with springs, and an extrusion space is obtained. By the external sleeve type oil scraping comb on the guide plate, oil and scum can be directly filtered into the oil residue collection tank, and accordingly land saving and oil removal are effectively realized. In addition, due to direct transporting, manual salvaging cost is reduced.

The invention relates to a drilling tool anti-dropping device and a drilling tool anti-dropping method for drilling operations in an oil and natural gas field, which can prevent a drilling tool from being cut off to dropping into a well under a special condition. The device and the method adopt the technical scheme that: the anti-dropping device is an outer metal shell; the cavity of the shell is internally provided with a slips the inner side of which is a circular arc surface with slips teeth connected with a slips connecting plate, and the slips connecting plate is connected with the lower face of a hydraulic cylinder; the outer part of the hydraulic cylinder is transversely connected with a tightly inserting plate which is provided with a fastening bolt; and the lower part of the hydraulic cylinder is provided with an oil inlet while the upper part is provided with an oil inlet pipe in which an overflow device is arranged and is connected with a hydraulic pipeline. The method uses two hydraulic cylinders to clamp and release the slips and controls piston rods of the hydraulic cylinders to drive the slips to move downwards through a connecting mechanism in an emergency. The inner side of the slips contacts the drilling tool to form self-locking to clamp the drilling tool. The anti-dropping device of the invention is simple in structure, stable in performance and reliable in construction method, can reduce the salvage cost of the drilling tool and can be widely applied to the drilling operation of oil and natural gas fields.

The invention provides a surface garbage salvage vessel which comprises a vessel body, a garbage salvage device, garbage collecting devices, a garbage conveying device and a control center. The garbage salvage device is arranged at the front end of the vessel body, the garbage collecting devices are arranged on the periphery of the vessel body and are fixedly connected to the vessel body through supporting pillars at bottoms of the garbage collecting devices, garbage dampers are arranged on the periphery of the garbage conveying device, a garbage conveying belt is arranged on the surface of the garbage conveying device, and the control center is arranged in the vessel body. By the arrangement, garbage on the water surface can be cleaned through the salvage vessel, automation degree is high, problems about low manual salvage efficiency, serious potential safety hazard, high salvage cost and small salvage range are effectively solved, the surface garbage salvage vessel is compact in structure and continuous and convenient in operation, difficulty in collecting the garbage on the water surface is reduced, and the environment pollution bought by the garbage of the water surface is alleviated.

A floater automatic cleaning device comprises a rack having buoyancy wheels; the buoyancy wheels are connected with a drive motor; a floater collector is connected with the rack through a support, and refers to a hopper structure; two sides of the floater collector are movably connected with the support; the floater collector is provided with a crossbar movably connected with a steering engine connecting rod; the steering engine connecting rod is hinged to a steering engine rotary plate; the steering engine rotary plate is connected with a steering engine output shaft; the steering engine is arranged on the rack. The buoyancy wheels can push the floater automatic cleaning device to move on the water surface; the floater collector is immersed in water; the floater automatic cleaning device is driven by the buoyancy wheels to land after salvage; the steering engine can be rotated, so the floater collector can lean to pour out the salvage waste.

The invention discloses an automatic cleaning device for riverway floating matter. The automatic cleaning devicefor riverway floating matter comprises a drainage channel allowing a water flow to flow,a conveyor belt for conveying a floating matter in the water flow, a collecting groove for collecting the floating matter which is conveyed by the conveyor belt, and a transmission mechanism for generating power through flowing of the water flow and driving the conveyor belt to operate, the conveyor belt is arranged between a waterinlet of the drainage channel and a wateroutlet of the drainage channel, a floating matter receiving end of the conveyor belt is close to one side of the waterinlet of the drainage channel, a floating matter discharging end of the conveyor belt is close to one sideof the wateroutlet of the drainage channel, the collecting groove is formed in the lower part of the floating matter discharging end of the conveyor belt, and the transmission mechanism is connected with the conveyor belt through gears, and drives the conveyor belt through flowing of a water body to convey the floating matter. According to theautomatic cleaning devicefor riverwayfloating matter, the technical problems of high working cost, small water areaapplication range and low working efficiencyof a riverwaydesilting device are solved.

The invention discloses a drilling pressure relief type drilling tool jamming accident fishing tool and method. The fishing tool comprises a cylindrical shell and a sliding sleeve. A transmission shaft penetrating through the shell is arranged in the shell, and a first boss is arranged at the outer edge of the middle of the shell. A second boss is arranged at the outer edge of the middle of the sliding sleeve, and the first boss is connected with the second boss. The top end of the transmission shaft is connected with a fishing drilling tool, and the other end of the transmission shaft is connected with a guide body. The maximum external diameter of the guide body is similar to that of the shell, one end of the guide body is connected with the transmission shaft, the other end of the guide body is connected with a fishing drill bit, and a chamfer is machined on the side, close to the fishing drill bit, of the guide body for guiding. The fishing tool is suitable for conventional drilling tool fishing, directional drilling tool fishing, coal bed drilling fishing and rock drilling fishing, and is wide in application range; the high-strength drilling tool is adopted in fishing drilling operation, and fishing capacity is high.

The invention relates to the field of construction, in particular to a salvage method for a large-diameter pile buried hammer. Equipment adopted by the salvage method comprises a punching pile machine, a new larger pile hammer, a small pile hammer, a positioning pulley, a movable pulley block, a guide wheel, an added winch, a slurry pump, a slurry conveying pipe and slurry. The punching pile machine comprises a main winch and a secondary winch. The main winch, the new large pile hammer, the small pile hammer and the positioning pulley form a new punching system. The secondary winch, the slurry pump, the slurry conveying pipe and the slurry form a slurry circulating system. The added winch, the movable pulley block and the guide wheel form a lifting system. The salvage method includes the following steps of A, positioning of the punching pile machine, B, assembling of the new punching system, C, installation of the movable pulley block, D, installation of the added winch and the guide wheel, E, assembling of the new lifting system, F, assembling of the new slurry circulating system and grouting, G, punching operation with the large pile hammer, H, punching operation with the small pile hammer, I, lifting with the lifting system and J, accomplishment of salvage of the pile buried hammer.

The invention relates to the technical field of riverway cleaning, in particular to a floatable riverway garbage salvaging device for hydraulic engineering and a salvaging method thereof. The floatable riverway garbage salvaging device comprises a floating salvaging device, a collecting device and a bottom salvaging device, wherein the bottom salvaging device is arranged at the bottom of the floating salvaging device, the floating salvaging device comprises a salvaging box, a hollow cavity is formed in the salvaging box, both a salvaging opening and a suction opening communicate with the hollow cavity, the salvaging opening and the hollow cavity form an L-shaped cavity, and a floating body is arranged at the bottom of the L-shaped cavity. According to the floatable riverway garbage salvaging device, water in a drain pipe is discharged backwards after the direction of a steering pipe is changed, so that sucked water is utilized; other power driving is not needed, so that the salvaging cost of the device is reduced; and in addition, separated water is adsorbed through activated carbon in a cavity of a filter layer, so that to-be-discharged water is purified, the pollution of discharged water to river water is reduced, and the environmental friendliness of the salvaging device is increased.

The invention discloses a rotation-free locking ring type sliding sleeve with a ball seat capable of being taken out. The sliding sleeve comprises a sliding sleeve body, an inner sliding sleeve and a ball seat cylinder, wherein the sliding sleeve body is composed of an upper connector, an outer cylinder and a lower connector. The sliding sleeve body and the inner sliding sleeve are fixed through a shear nail, the inner sliding sleeve and the ball seat cylinder are fixed through a shear nail, a fluid outlet hole is formed in the upper portion of the outer cylinder, and a clamping spring hole is formed in the inner wall of the outer cylinder. A switch clamping groove is formed in the inner wall of the upper portion of the inner sliding sleeve, a clamping spring is installed on the outer wall of the middle of the inner sliding sleeve, and a locking ring is installed in the peripheral direction of the inner wall of the middle of the inner sliding sleeve. A plurality of female pawls are arranged on the inner side of the upper end of the ball seat cylinder in the peripheral direction, a plurality of male pawls are arranged at the lower end of the ball seat cylinder in the peripheral direction, and the middle of the inner wall of the ball seat cylinder protrudes inwards for forming a variable diameter ball seat. An inwards-concave step-shaped locking ring groove is formed in the middle of the outer wall of the ball seat cylinder, and the inner side of the locking ring is clamped in the upper portion of the locking ring groove. When the inner sliding sleeve moves to the lower end of the outer cylinder, the clamping spring on the inner sliding sleeve is clamped into the clamping spring hole in the outer cylinder. All base seat cylinders can be salvaged through the sliding sleeve in a disposable mode, and a full through path is achieved.

The invention discloses automatic salvage equipment, which comprises a floating frame and a shell fixedly arranged on the floating frame, wherein a first pushing groove and a second pushing groove aremutually communicated, extend up and down, and are arranged in the shell, a second pushing block is arranged in the second pushing groove and is slidably and cooperatively connected to the second pushing groove, a first elastic member is arranged at the top portion of the second pushing block and in the second pushing groove, the top end of the first elastic member is fixedly connected to the topend wall of the second pushing groove, and the bottom end of the first elastic member is fixedly connected to the top end surface of the second pushing block. According to the present invention, theautomatic salvage equipment has characteristics of simple structure and convenient use, can automatically control the metal material product salvage operation and the movement, can substantially improve the accuracy and the continuity of the metal material product salvage, can improve the metal material product salvage efficiency and the metal material product salvage effect, has the low salvage cost, and is suitable for popularization and use.

The invention discloses a small river channel automatic cleaning device. The device comprises a hollowed-out outer shell, a garbage basket, a spiral impeller, a solar panel and an inner rotating shaft, wherein the garbage basket is fixedly installed on the right end face of a right end plate, a collecting hole is formed in the garbage basket, and the collecting hole is right opposite to a discharging port; the spiral impeller is located in the outer shell, one end of a center shaft of the spiral impeller is in running fit with a bearing seat, the other end of the center shaft of the spiral impeller is in running fit with a left end plate and protrudes out of the left end plate to form a protruding section, the protruding section is in transmission connection with a motor fixed to an upperbaffle through a belt, and the motor is electrically connected with an energy storage unit; and a plurality of small water wheels are fixedly arranged on the inner rotating shaft. According to the device, a small hydroenergy power generation device capable of utilizing water flow to generate power can be utilized, and a solar power generation system is additionally arranged, so that sufficient power of the device in a working area is ensured, and operation is maintained.

The invention discloses a sieve tube sand prevention pipe column and a releasing method thereof. The pipe column comprises a sand prevention well remaining pipe column and a flushing pipe column, wherein the sand prevention well remaining pipe column comprises, in order from top to bottom, a sand prevention packer, a length adjusting light pipe, a sand prevention sieve pipe, a sanding setting light pipe and a flushing tool, and the flushing tool is provided with a switching mechanism; the flushing pipe column includes a washing pipe, a vibration washing machine disposed on the washing pipe anda flushing insert connecting tool matched with the flushing tool; when sand sticking occurs in the sand prevention well remaining pipe column, the flushing pipe column is lowered into the sand prevention well remaining pipe column, the flushing insert connecting tool opens the switching mechanism of the flushing tool, and the annulus outside the sand prevention well remaining pipe column is communicated with the interior of the flushing pipe column to form a flushing and releasing circulation passage. The sieve tube sand prevention pipe column and the releasing method thereof achieve high-efficiency releasing and quick salvage of the sieve tube sand prevention pipe column by means of liquid flow flushing.

The invention relates to the technical field of water conservancy equipment, and discloses a river bank fishing device capable of automatically adjusting the cleaning depth. The river bank fishing device capable of automatically adjusting the cleaning depth comprises a device body, a second motor is fixedly connected to the top of the device body, the right end of the second motor is in transmission connection with a threaded rod through a bevel gear set, a sliding block is in threaded connection with the outer part of the threaded rod, a lever is fixedly connected to the right end of the sliding block, and a floating plate is fixedly connected to the bottom of the right end of the lever. According to the river bank fishing device capable of automatically adjusting the cleaning depth, thefishing depth is changed according to the water level change of the water surface, the work can be completed without replacing fishing device with different lengths, so that the trouble and the laborare saved, the fishing cost is reduced, the effect of automatically fishing garbage and floating objects which are flushed by water flow is achieved, manual operation is not needed, the personnel areprevented from approaching to a place with turbulent water flow, the personnel expenditure is reduced, and the construction safety is improved.

The invention discloses a metal product fishing device which comprises a floating frame and a shell. The shell is fixedly arranged on the floating frame, a first push groove and a second push groove which are communicated with each other and are extended in the up-down directions are formed in the left and the right of the inside of the shell, a second push block is arranged in the second push groove and is connected with the second push groove in a sliding fit manner, a first elastic component is arranged in the second push groove and is positioned on the top of the second push block, the topof the first elastic component is fixedly connected with the top wall of the second push groove, and the bottom of the first elastic component is fixedly connected with the top surface of the secondpush block. The metal product fishing device has the advantages that the metal product fishing device is simple in structure and convenient to use; fishing operation can be carried out on metal material products under the automatic control, the metal product fishing device can move under the automatic control, and accordingly, the metal material product fishing accuracy and continuity can be greatly improved, the metal material product fishing efficiency and metal material product fishing effects can be improved, and the metal product fishing device is low in fishing cost and suitable for popularization and utilization.

The invention discloses a releasable connector. A tension rod and a salvage head are located in a connecting sleeve. A first connecting inserting part is sleeved with one end of an upper joint. The outer wall of the other end of the upper joint is sleeved with one end of an upper joint. The outer wall of an upper transition joint is sleeved with one end of the connecting sleeve. The outer wall ofthe salvage head is sleeved with the other end of the connecting sleeve. The upper transition joint is connected with one end of the tension rod. The other end of the tension rod is connected with oneend of the salvage head. The outer wall of one end of a lower joint is sleeved with the other end of the salvage head. A second connecting inserting part is inserted into the other end of the lower joint. The first connector is connected with one end of a guide wire. The other end of the guide wire is connected with the second connector after penetrating out of the upper joint, penetrating through the upper transition joint, the connecting sleeve and the salvage head, and then being inserted into the lower joint. According to the releasable connector, the problem that a cable is damaged caused by salvage operation is avoided, and salvage difficulty, salvage risk and salvage cost are relatively low.

The invention provides a sea mooring system salvaging device which comprises: a salvaging rope with one end provided with a sinker and the other end connected to a salvaging boat; a plurality of salvaging hooks which are hung on the salvaging rope and are located between the sinker and the salvaging boat, wherein the salvaging hooks comprise a main rod, array barbs disposed on an outer wall of the main rod, and 5-15 layers of array barbs are provided, 4-8 barbs in each layer; annular lifting lugs disposed at two ends of the main rod. According to the invention, salvaging hooks with array barbs are used, and have more barbs when compared with salvaging hooks with 3-5 pawls used in the prior art; therefore the chance for barbs to contact a sea mooring system is increased, and the salvaging efficiency is improved; experiments demonstrates that when 5-50 salvaging hooks provided by the invention are used for salvaging, the salvaging efficiency is above 90%, and the salvaging cost is reduced. The invention also provides a salvaging method of sea mooring systems.

The invention discloses a self-floating type offshore unmanned aerial vehicle, comprising a vehicle body and wings, wherein the wings are arranged at the two sides of the vehicle body; vertical take-off and landing arms are arranged on the two wings; and the vehicle body is made of a carbon composite PVC foam material; the wings are made of a Kevlar composite PVC foam material; the vertical take-off and landing arms are made of a 3K carbon fiber material; and falling water can be guaranteed to float on a water surface through materials and a pneumatic design of a machine body . The invention also discloses a falling-into-water search and rescue system, which is used for falling-into-water trigger alarm, floating modeling analysis and instruction search and rescue operation of the unmannedaerial vehicle, comprising the unmanned aerial vehicle, a Beidou satellite emitter, an AIS base station, a command terminal and a plurality of AIS ship terminals, wherein the command terminal sends analarm signal to the Beidou satellite emitter according to Beidou positioning information of the unmanned aerial vehicle and AIS identification information of the AIS ship terminals, and arrange shipsnearby for salvage through modeling, calculation and analysis. The falling-into-water search and rescue system is convenient for search and rescue of the unmanned aerial vehicle which falls into water, thus reducing salvage cost and being safe and reliable in an search and rescue process.

The invention discloses a novel storm-resistant salvage ship. The novel storm-resistant salvage ship comprises a mother ship body and a salvage platform; a water spraying driving device is mounted inthe rear end of the mother ship body; a front storm-resistant shock absorber and a rear storm-resistant shock absorber are respectively mounted at the front end and the rear end of the mother ship body; the salvage platform is connected with the mother ship body through the front storm-resistant shock absorber and the rear storm-resistant shock absorber; a battery power module and a remote controlreceiver are arranged above the salvage platform; the outer side of the battery power module is connected with an electronic speed controller; cameras are mounted on the front side and the rear sidebelow the salvage platform; the lower part of the salvage platform is connected with a suspension fixing device; and a small rubber ball is arranged at the lower end of the suspension fixing device. The novel storm-resistant salvage ship adopts dual ship bodies, drives stably and does not shake easily; the front storm-resistant shock absorber and the rear storm-resistant shock absorber are arranged, so that the collision damage to the ship body caused by the storm can be reduced when the salvage ship sails on the sea; and therefore, the service life of the equipment is prolonged.

The invention discloses a salvage method based on underwater welding, and belongs to the technical field of salvage. The salvage method is characterized in that a stress eye plate is welded on an underwater sunken ship body, a lifting steel wire is connected with the stress eye plate, and a water surface crane draws the sunken ship out by pulling the lifting steel wire. According to the method, the low-efficiency and difficult-to-construct link of the existing difficult ship salvaging method involved in the sunken ship is avoided, and the salvaging task of any seabed sediment can be achieved.Besides, the method can realize underwater straightening operation for the sunken ship in an underwater non-upright posture so that the salvage method has low requirements on the posture of an underwater difficult ship and is wider in application range in the salvage industry, and the salvage cost can be greatly reduced and the salvage construction period can be shortened by applying the technology.

The invention relates to the technical field of oil and gas exploitation, and particularly discloses a horizontal well coiled tubing salvage method which comprises the following steps: S1, lightly finding a fish top: descending a salvage tool into a well until the salvage tool touches a fish, then lifting an oil tube by 2-3 m, and recording a normal hanging weight; s2, pressurizing and fishing: lowering an oil pipe to pressurize the top of the fish for 20-50kN, if the hanging weight is increased at the moment, indicating that the fish enters, then lifting the oil pipe, and if the hanging weight is higher than the normal hanging weight at the moment, indicating that the fish is fished; if the hanging weight is not changed, continuously pressurizing the falling fish by 20-50kN, and judging the fish entering condition again; the pump is stopped after 10-20 seconds after the pump is started, if the hanging weight or the pump pressure is increased, it is indicated that the fish enters the oil pipe, then the oil pipe is lifted, and if the hanging weight is increased compared with the normal hanging weight, it is proved that the fallen fish is possibly fished. The scheme is used for solving the problem that in the prior art, the fishing efficiency of shale gas well fallen fish fishing is low.

The invention discloses a drill bit fishing device. The drill bit fishing device comprises a cover body, an air injection pipe, a camera shooting mechanism and a mechanical arm, the upper end of the cover body is sealed, the lower end of the cover body is open, the cover body is used for covering a fished object, a lifting rope is connected to the outer side of the top of the cover body, the lifting rope is used for lowering or lifting the cover body, and a connecting rope is connected to the inner side of the top of the cover body; the air injection pipe is connected into the cover body fromthe top end of the cover body and is used for injecting air into the cover body; the camera shooting mechanism is mounted in the cover body and is used for obtaining video information in the cover body and transmitting the video information to a display device outside a well for display; and the mechanical arm is used for fixing the connecting rope to the fished object. Meanwhile, the invention further discloses a drill bit fishing method adopting the drill bit fishing device. The problem that fishing cannot be carried out directly by adopting a mechanical mode due to muddy and unviewable mudin the well is solved.

The invention provides an overshot with slots for salvaging sucker rods. The overshot with slots comprises a tubular overshot body, a section of connection oil pipe is fixedly arranged at the upper portion of the overshot body, and the upper portion of the connection oil pipe is fixedly connected with a short section. Two slots facing to each other are formed in the pipe wall of the overshot body. Slot tongues inclining upwards towards the inside of the overshot body are formed on the slots. The distance between the tops of the two slot tongues facing to each other is smaller than the diameter of an upper coupling of each sucker rod. The overshot with slots for salvaging sucker rods can avoid large area of crude oil pollution in salvage of the sucker rods, reduce salvage cost and save manpower and material resources.

The invention discloses an in-situ anaerobic fermentation integrated device and an urban and rural river and lake water surface algae pollution prevention and control planning method, belongs to the technical field of algae treatment devices, and aims to solve the problems of high construction cost, large occupied area, incapability of moving and unscientific fishing prevention and control planning of a fishing and treatment device in a water algae fishing technology. The device comprises a top film, a bottom film, a feeding pipe, an air guide pipe, a liquid discharging pipe, a slag discharging opening, a floating anti-collision protection device and a traction device; the top film and the bottom film are flexible films; the lower surface of the top film and the upper surface of the bottom film are arranged to form an enclosed flexible air bag, the edges are pressed into a whole, and the air bags are used for accommodating biogas residues, biogas slurry and biogas which are generated by algae fermentation; one end of the feeding pipe is arranged in the air bag, and the other end is outside the air bag; one end of the air guide pipe is arranged at the center in the air bag close to the vertex position and is positioned above the biogas slurry level, and the other end is arranged outside the air bag and is connected with a biogas collecting device; one end of the liquid discharging pipe is arranged inside the air bag, and the other end is arranged outside the air bag; a closed flange is arranged at the slag discharging opening; and the traction device is movably connected with the air bag. According to the scheme of the invention, the device is small in occupied area, low in cost, capable of being moved and folded for storage and scientific in fishing route planning.

The invention discloses a releasable connector. A tension rod and a salvage head are located in a connecting sleeve. A first connecting inserting part is sleeved with one end of an upper joint. The outer wall of the other end of the upper joint is sleeved with one end of an upper joint. The outer wall of an upper transition joint is sleeved with one end of the connecting sleeve. The outer wall ofthe salvage head is sleeved with the other end of the connecting sleeve. The upper transition joint is connected with one end of the tension rod. The other end of the tension rod is connected with oneend of the salvage head. The outer wall of one end of a lower joint is sleeved with the other end of the salvage head. A second connecting inserting part is inserted into the other end of the lower joint. The first connector is connected with one end of a guide wire. The other end of the guide wire is connected with the second connector after penetrating out of the upper joint, penetrating through the upper transition joint, the connecting sleeve and the salvage head, and then being inserted into the lower joint. According to the releasable connector, the problem that a cable is damaged caused by salvage operation is avoided, and salvage difficulty, salvage risk and salvage cost are relatively low.

The invention discloses a floating algae salvage device, and particularly relates to a floating algae salvage device, which can adapt with the change of a water level to automatically lift when a drawing machine is positioned in a horizontal direction. The floating algae salvage device is characterized by comprising a polygon surrounding tube, wherein one side of the surrounding tube is connected with a pipeline; the surrounding tube is communicated with an algae-laden water treatment system on the shore by the pipeline; an upright post is connected below the sounding tube; a connecting rack is arranged on the sounding tube; the connecting rack comprises two parallel first connecting rods; a second connecting rod is connected between the two first connecting rods; one first connecting rod is connected with the corresponding edge of the sounding tube by a hinge in parallel; the other connecting rod is connected with a suspending drawing machine by the hinge; an opening is arranged at each edge of the sounding tube; and the opening is communicated with a water outlet of corresponding suspending drawing machine by a control valve and a hose. By adopting the device for savaging blue-green algae, the investment and the salvage cost are reduced; and moreover, height of the drawing machine can be automatically adjusted along with water surface fluctuation, and the oriented operation in the horizontal direction can be carried out.

The invention discloses a salvage method based on underwater welding, which belongs to the technical field of salvage. The salvage method adopts the welding of a stressed eye plate on the hull of an underwater sunken ship, and connects the lifting steel wire with the stressed eye plate. The hoisting wire lifts the wreck out of the water. The method avoids the low-efficiency and difficult-to-construction link of the existing shipwreck salvage method running through the sunken ship, and can realize the salvage task of any sea bottom quality. In addition, for underwater sunken ships that are not sitting upright, this method can realize underwater straightening operations. Therefore, this salvage method has less requirements on the attitude of underwater shipwrecks, and has a wider range of applications in the salvage industry. The application of this technology can Significantly reduce the salvage cost and shorten the salvage period.