45results about How to "Does not affect fixation" patented technology

The invention relates to a bad fruit sorting device after box opening, for wholesale of agricultural and sideline products. The bad fruit sorting device comprises a dumping mechanism, a washing mechanism, a sorting mechanism, a detecting mechanism, a shock absorption mechanism and a fruit frame, wherein the washing mechanism is arranged on one side of the dumping mechanism; the sorting mechanism is mounted on the body wall on one side of the washing mechanism; and the detecting mechanism is arranged on the sorting mechanism. According to the bad fruit sorting device disclosed by the invention,the dumping mechanism is arranged, so that after box opening, fruits can be automatically dumped; a fruit box is placed on a placing plate, and a servo motor is started to drive a screw rod to rotate; under the effect of the screw rod, the placing plate is driven by a bevel gear to lift above a bracket frame; an electric telescopic rod is started to push one end of the placing plate to lift; in the lifting course, one end of the placing plate is fixed by a supporting rod, so that the placing plate can be assisted by a rotating shaft to rotate and slope; a rotating shaft is also arranged between the supporting rod and the placing plate, so that the sloping of the placing plate cannot be influenced, fruit boxes are convenient to automatically dump; and fruits in the fruit boxes are poured in the washing mechanism, and manual conveying is not needed.

The invention relates to an inverse hydraulic movable lifter and an use method thereof. The lifter is of a separated structure, and comprises a travelling wheel, a portal, a support mechanism, supporting legs and an oil pump. The supporting legs are fixedly connected with the portal, the oil pump drives the support mechanism to move vertically along the portal, and the oil pump is fixedly connected with the support mechanism. The inverse hydraulic movable lifter and the use method thereof have the advantages that the separated structure is adopted, so that the transport is more convenient, the occupation space is small, and field assembly is facilitated; the oil pump and the portal are of a separated structure, so that separated transporting and temporary assembling are achieved; at the same time, the oil pump maintenance and part replacement are facilitated; the oil pump is used for lifting, the lifter is lifted to a certain height, a user can conveniently move, and both time and labor are saved. The whole structure is simple, the size is small, and the use is flexible and convenient.

The invention discloses a method for preventing and stopping a crack of an open right angle corner of a ship metal structure trunk bulkhead. The method for preventing and stopping the crack of the open right angle corner of the ship metal structure trunk bulkhead is characterized in that the traditional crack-stopping hole design is replaced by using a crack-stopping crack design so that the stress originally concentrated on the right angle corner is transferred to an intersected deck (or an intersected trunk bulkhead) easy to reinforce or is dispersed to a specially designed anti-crack circular arc by using a specially designed crack-stopping crack; therefore, the convenience of the structure is convenient to reinforce or the concentrated stress is reduced to effectively stop and preventthe crack.

A method for producing an iodine radioisotopes fraction, comprising the steps of dissolving enriched uranium targets forming a slurry, filtering the slurry, absorbing salts of iodine radioisotopes onan aluminium resin doped with silver and recovering the iodine radioisotopes fraction. The recovery of the iodine radioisotopes fraction, in particular of I-131, comprises washing the aluminium resindoped in silver using a solution of NaOH and eluting of iodine radioisotopes by a solution of thiourea, and collecting an eluate containing the iodine radioisotopes in a theourea solution.

The invention relates a pipeline anti-damage hose clamp with high fastening forces, which comprises a strap and is characterized by further comprising a connecting bracket, a retreat preventing baffle group, rivets and a screwing rod, wherein the connecting bracket is fixedly arranged on the fixed end of the strap; a screwing rod installation hole is formed in the head of the connecting bracket; rivet installation holes are formed in the tail of the connecting bracket; the screwing rod is arranged in the screwing rod installation hole in the connecting bracket; a penetrating seam for a free end of the strap is axially formed in the body of the screwing rod; a meshing fluted disc is arranged on the body of the screwing rod; the retreat preventing baffle group is arranged on the rivet installation holes in the connecting bracket through the rivets; and the retreat preventing baffle group is provided with meshing teeth which are engaged with the meshing fluted disc of the screwing rod. The hose clamp has the advantages of being scientific and reasonable in structure design, high in fastening force, quakeproof, capable of preventing pipeline damage, easy in disassembly, difficult in fracture, long in service life and convenient in use, and is a highly innovative hose clamp.

The invention discloses a cabinet supporting foot mechanism capable of ascending and descending rapidly. The cabinet supporting foot mechanism capable of ascending and descending rapidly comprises a connecting block arranged on a cabinet. A penetrating hole is formed in the connecting block and internally provided with an internal thread. A supporting foot connecting rod is arranged in the penetrating hole. An upper stud is arranged at the upper portion of the supporting foot connecting rod. A lower stud is arranged at the lower portion of the supporting foot connecting rod. The upper stud and the lower stud are matched with the internal thread and connected through a cylindrical portion. The diameter of the cylindrical portion is smaller than that of the upper stud and that of the lower stud. A thread in the middle section of a supporting foot body is removed so that the upper stud and the lower stud can be formed. The diameter of the cylindrical portion between the upper stud and the lower stud is slightly smaller than that of the upper stud and that of the lower stud. When a supporting foot ascends, the upper stud rotates in the penetrating hole to penetrate out of the penetrating hole, the cylindrical portion then penetrates out of the penetrating hole rapidly, the supporting foot body is fixed to the connecting block by rotating the lower stud, only opposite operation needs to be performed when the supporting foot descends, and therefore the rapid ascent and the rapid descent of the supporting foot are achieved.

The invention provides printing and dyeing equipment, and relates to the technical field of garment mark printing. The problems are solved that linkage absorption and filtration of harmful gas duringprinting cannot be achieved in a linkage manner in the up-and-down printing process, the wind power drying of pigment on a clothing mark cannot be achieved in a linkage manner in the up-and-down printing process, and a purification structure and a drying structure cannot be organically combined with a fixing structure of the clothing mark. The printing and dyeing equipment comprises a main body seat and a rectangular plate, wherein a printing and dyeing structure is mounted on the main body seat, a purification structure is mounted on the main body seat, and a drying structure is further mounted on the main body seat. As the outer wall of a spray head is slidably connected with two sliding rods B on the rear side, the two sliding rods B on the rear side are sleeved with two elastic piecesB, the two elastic pieces B jointly form an elastic reset structure of the spray head, the spray head is in an elastic contraction state when a printing and dyeing base conducts printing and dyeing, and normal printing and dyeing are not affected.

The invention discloses a catheter assistor for intervene through radial artery, which is used to guide the instrument through abnormal paths, guide the instrument into the blood vessel or increase the torque control of catheters in the intervene through radial artery therapy; the device comprises a head end, a body part, a transition section, a push rod, a lock lever and a tail handle. the head end is tapered; the body part is cylindrical; the transition section is slanting streamline and gradually transitions to the push rod; a quick exchange hole is arranged in the middle of the transitionsection; the head end, the body part and the transition section are hollow, and there are opaque X-ray marks near the end hole and the two ends of the body part; the push rod is a stainless steel hypotube; the locking rod is a cylinder presets different grooves for easy locking with the guide wire and the catheter end; the end handle is flat, which is good for the operator to control; the surfaceof the instrument is coated with a super-slip coating. The catheter assistor for intervene through radial artery is designed according to the anatomical features of the intervene through radial arterytherapy, which can effectively improve the safety of the interventional procedure and the success rate of the approach.

The invention belongs to the technical field of dancing education and discloses dance education equipment based on tremor ligament stretching training. The dance education equipment based on tremor ligament stretching training comprises a bottom plate; an anti-slip pad is bonded at the edge of the lower surface of the bottom plate, and the lower surface of the anti-slip pad is provided with anti-slip stripes; the left and right sides of the upper surface of the bottom plate are provided with sliding grooves, and the two sliding grooves are symmetrical with respect to the central axis of the bottom plate. According to the invention, through the arrangement of the compression spring, the elastic force of the compression spring can be utilized to provide assistance for the splitting process of the user; compared with the prior art, the splitting process exercises the rhythm of the splitting and utilizes the expansion and contraction of the compression spring to find the training rhythm more easily through the expansion and contraction of the compression spring during the vibration training, which is helpful for assisting the user to complete the vibration ligament stretching training,and solves the problems raised in the prior art.

The invention discloses a high-efficiency automatic cleaning device of a numerical control machine tool. The device comprises a machine body shell; symmetric support frames are arranged on two sides of the lower end of the machine body shell; a transverse frame is arranged between the two support frames; a conveying belt is arranged between two rotating shafts; two water separation pipes perpendicular to a water spraying pipe are arranged at an extension end of the water spraying pipe; connecting sleeves are arranged at one ends of the two pipes; rotating blocks are respectively arranged on two sides of extension ends of the two pipes; nozzles are arranged at one ends, near the rotating blocks, of the two pipes; second grooves are symmetrically formed in one sides of the two connecting sleeves; slide blocks are arranged in the two second grooves; extension rods are fixedly connected to the two slide blocks; a bearing is sleeved in the pipe wall of one end, near a notch, of the water spraying pipe; and a water inlet pipe is inserted in the bearing. The device is simple in structure, easy to operate and high in cleaning efficiency, realizes multi-angle and multi-direction cleaning, is convenient and skillful in use, and is suitable for wide popularization.

The invention discloses a rotating socket. The socket includes a rotating socket body, wherein the rotating socket body is provided with a live wire connecting copper conductor and a zero wire connecting copper conductor and a ground connecting copper conductor, the live wire connecting copper conductor and the zero wire connecting copper conductor are rotatable rotating rods, and the ground connecting copper conductor is an elastic telescopic conductor; a two-plug anti-electric shock protection door and a three-plug anti-electric shock protection door are embedded in a shell and are fixed bya protective door stabilizer device; an L-class live wire conductor copper rod, an N-class zero wire conductor copper rod, and an E-level ground conductor copper rod are embedded and assembled insidea socket base; and a socket copper piece L-class live wire, a socket copper piece N-class zero wire, and a socket copper piece E-class ground wire are fixed on the socket base, and when the rotating socket is rotated to two gear switching based on track housing horizontal line 45-90 degrees, power-on / power-off power of the rotating socket can be achieved, fixation of the rotating socket based on atrack housing is not affected, and the socket substitutes a mechanical switch.

The present invention discloses a widely-applied test tube rack comprising a frame, the frame is provided, from top to bottom, with a top layer, a middle layer and a bottom layer, the top layer comprises a top layer mesh structure comprising a top layer transverse line and a top layer longitudinal line, the middle layer comprises a middle layer mesh structure comprising a middle layer transverse line and a middle layer longitudinal line, both sides of the intermediate layer transverse line are connected to a sliding rod on a transverse connecting rod, both ends of the intermediate layer longitudinal line are connected to a sliding rod on a longitudinal connecting rod, the sliding rods sleeve the transverse connecting rod and the longitudinal connecting rod, the transverse connecting rod and the longitudinal connecting rod are respectively provided with a scale hole, and the sliding rods are respectively provided with a fixing hole. The test tube rack has the advantages of being easy to use, easy to operate, capable of making full use of the advantages of the test tube rack and reducing laboratory test tube rack waste, material-saving, small in floor space, and the like.

The invention discloses a convenient-to-move power cabinet with a heat dissipation function. The power cabinet comprises a cabinet body, a partition plate, ventilation openings, a gauze door and fixedrods, and is characterized in that a motor is arranged at the lower part in the cabinet body, a water pump is arranged on one side of the motor, the water pump is connected with a water pipe, a condenser is arranged on one side of the water pump, a water tank is fixed on one side of the condenser, a water pipe is embedded in the partition plate, sponge is fixed below the partition plate, a damp-proof net is fixed below the sponge, the ventilation openings are formed below the damp-proof net, the ventilation openings are respectively provided with fans, the gauze door is arranged on the cabinet body and provided with a door handle, the bottom of the cabinet body is provided with bases, one side of each base is provided with a wheel, and a rotating rod is inserted in the wheel. The convenient-to-move power cabinet with a heat dissipation function is provided with the fans, the installed fan sucks in air of the ventilation opening and blows out the air towards the gauze door, and the gauze door is of a ventilation net structure, thereby achieving both a cooling effect and a drying effect.

The invention discloses steady portable combined type lifting equipment and a use method thereof. The steady portable combined type lifting equipment comprises four lifting machines, a hydraulic system and a control device, wherein the lifting machines are provided with reversely arranged oil pumps, are symmetrically placed on four corners to form a rectangle; hydraulic oil cylinders of the oil pumps of the lifting machines are connected with the hydraulic system; and the hydraulic system is electrically connected with the control device. The lifting equipment has the advantages that with the adoption of a split type structure, the lifting equipment is convenient to transport, does not occupy too much space, and facilitates field assembly; the oil pumps and a portal are in split structures, so that separated transportation and temporary assembly are realized; in addition, the oil pumps are convenient to overhaul, and parts are convenient to replace; with the adoption of the oil pumps for lifting, the lifting machines are lifted to a certain height, so that an operator can move the lifting equipment conveniently, and the time and labor are saved; and the lifting equipment is simple in overall structure, small in size, and flexible and convenient to use.

The invention discloses a photovoltaic back membrane resistance testing instrument. The testing instrument comprises a resistance surface box, terminals and a connecting mechanism, wherein the terminals comprise a front face negative electrode terminal and a front face positive electrode terminal which are in contact with the front face of a photovoltaic assembly and back face positive electrode terminal and a back face negative electrode terminal which are in contact with the back face of the photovoltaic assembly, the terminals are connected with the resistance surface box through guiding wires, the connecting mechanism is movably connected with and mutually insulated from the front face positive and negative electrodes and is movably connected with and mutually insulated from the back face positive and negative electrodes, the connecting mechanism fixedly fits the photovoltaic assembly through suction plates, the suction plates comprises an upper suction plate and a lower suction plate, the upper suction plate is connected with the front face negative and positive electrode terminals through two extending arms, and the lower suction plate is connected with the back face positiveand negative electrode terminals through two extending arms. By means of the testing instrument, the insulation performance between the two faces of the photovoltaic assembly can be detected, the insulation performance between the faces on the same side can be detected, and local detection can be conducted on the photovoltaic assembly at will, and the accuracy is high.

The invention relates to the technical field of metal for aerated plate manufacturing, and discloses a plastic hook with high pressure resistance for fixing a reinforcement mesh cage structure. The plastic hook with the high pressure resistance for fixing the reinforcement mesh cage structure comprises a clamping sleeve, fixing frames and fixing clamps, wherein the fixing frames comprise the firstfixing frame and the second fixing frame, the first fixing frame and the second fixing frame are both fixedly connected with the clamping sleeve, the fixing clamps comprise the first fixing clamp, the second fixing clamp and the third fixing clamp, the first fixing clamp is fixedly connected to the free end of the first fixing frame, the second fixing clamp is fixedly connected to the free end ofthe second fixing frame, the third fixing clamp is fixedly connected to the connection position of the first fixing frame and the clamping sleeve, a plurality of capacity grooves are formed in the outer side wall of the clamp sleeve, and the capacity grooves are all located on the same horizontal plane. The plastic hook has the advantages of being high in stability, not prone to deformation and good in metal mesh fixing effect, and is also high in pressure resistance and capable of bearing relatively large pressure.

The invention relates to the field of medical appliances, and especially relates to a test tube used for storing liquid, such as body fluids or blood. The test tube includes an annular side wall and a bottom sealing board, an opening is formed on the upper part of the test tube. The upper part of the test tube is matched with and connected to other equipment. The middle and lower parts of the test tube are used for storing the liquid. A bended part is formed between the upper and the lower parts of the test tubes, wherein the diameter of the upper part is larger than that of the lower part, so that liquid storage quantity of the liquid storage part can be reduced when liquid at the same liquid level is collected. The test tube is reduced in volume and reduces use amount of raw materials, greatly reduces cost and is convenient to fill with the liquid. In addition, when the test tube is fixed with a test tube bracket or a detection device, the test tube is not liable to shake.

The invention discloses a front and rear cylinder body detection device. Thefront and rear cylinder body detection device comprises a base, a guide rail, a left sliding support, a right sliding support, a positioning base, a positioning core rod, a sliding block, a gauge stand, a rotary swing arm, a fixing clamp and a dial gauge. The positioning core rod comprises a first core rod, a second core rod symmetrical to the first core rod, and a connecting assembly used for connecting the first core rod and the second core rod. The first core rod and the second core rod are the same in structure.

The invention provides a riveting nut which is provided with a nut body. The inner wall of the nut body is provided with an internal screw thread; the riveting nut also comprises a connecting part; a first end of the connecting part is fixed on the nut body; the connecting part is of a spiral shape; the connecting part extends along the axial direction of the nut body; the riveting nut is also provided with a fixing part; the fixing part comprises a fixing plate and a positioning ring positioned on one end face of the fixing plate; a second end of the connecting part is fixed on the positioning ring; and the fixing part is provided with a through hole running through the fixing plate and the positioning ring. The riveting nut provided by the invention can be conveniently arranged on a board which is inconvenient to place a common nut, is firmly connected with a bolt and is difficult to fall off.

Refrigerating equipment comprises a liner (1), an evaporator (2) connected to the liner (1) and a heating device (3), wherein an interval exists between the heating device (3) and the evaporator (2), the heating device (3) comprises a heat conduction plate (30) and a heat source connected to the heat conduction plate (30), and the lateral side (301) on one side, close to the evaporator (2), of the heat conduction plate (30) is provided with at least one notch. By the notches, sudden change of the cold source of the evaporator (2) and the heat source of the heating device (3) at one linear edge, cold and heat distribution is allowed to have certain gradient range, and the liner (1) cracking problem is relieved.

A notebook battery protection board disclosed in the invention, and comprises a cover plate and a base, the bottom face of the cover plate is concave inwards, a first rectangular groove is formed in the right end of the cover plate, a check block is fixedly connected to the upper groove face of the first rectangular groove, equidistant gaps are reserved between the front end and the rear end of the check block and the front groove face and the rear groove face of the first rectangular groove correspondingly, a storage groove is formed in the upper surface of the base, a second rectangular groove is formed in the right face of the base, a partition plate is fixedly connected to the middle of the bottom face of the storage groove, two first inserting grooves are formed in the upper face of the partition plate, the front end and the rear end of the partition plate are fixedly connected with the middle of the front groove face and the middle of the rear groove face of the containing groove correspondingly, a movable block slides in a third groove until the slide rod reach the tail end of the second rectangular groove, the limiting effect on the battery packs is achieved, inserting plates are downwards inserted into the corresponding first inserting grooves at the moment, the positions of the slide rods are further limited while the height of a first limiting plate is reduced, and the limiting effect is improved.

The invention discloses a method for processing a hinge seat of a civil air defense door, which comprises a core layer, a protective layer and a stable layer. The present invention improves the steel casting process. By controlling the thickness of the coating material, dry quartz sand without adhesives and additives is selected, and a double-structure sand box is used to set air holes and leakage nets to prevent gravel from entering the vacuum chamber. Guarantee the grasp of the gas tension scale during casting, and then improve the characteristics of the steel, so that the steel can reduce the porosity defects in the pouring process, improve the quality of the steel material, fundamentally improve the quality of the core layer steel, and ensure the stability of the steel. The protective layer ensures that the core layer still plays a fixed role after the cracked state. The outer periphery of the flexible layer is protected by a strong material, which again ensures the solid performance of the door hinge seat, improves safety and is easy to install and use, and adds a stable layer to the door hinge seat. Perform further base stabilization to further strengthen the combination between the door hinge seat and the wall.

The invention discloses machined-mounted hydraulic anchor rod drilling equipment comprising a moving unit and a hydraulic anchor rod machine. The anchor rod drilling equipment is fixedly connected with a heading machine through a fixed unit; the moving unit changes the horizontal position of the hydraulic anchor rod machine through a longitudinal moving mechanism and a transverse moving mechanism; and the space angle of the hydraulic anchor rod machine and the matching position of the hydraulic anchor rod machine and the moving unit are changed by rotating the moving unit, so that the purpose that the hydraulic anchor rod machine is controlled to conduct drilling machining on a roadway of any angle in front of the heading machine is achieved. The machined-mounted hydraulic anchor rod drilling equipment has the advantages that fixing is convenient, moving and dismantling are facilitated, the function of the heading machine are not influenced, advancing supporting is conducted conveniently and fast on the roadway in front of the heading machine, and the machined-mounted hydraulic anchor rod drilling equipment has the good popularization prospects.

The invention relates to a dust collection device used for toothed paper cutting. The dust collection device comprises a rectangular frame. The front end surface and the back end surface of the rectangular frame are each provided with a through hole. The through hole in the front end surface of the rectangular frame corresponds to the through hole in the back end surface of the rectangular frame. A vibration motor is installed on the left end surface of the rectangular frame. A top cover is arranged on the rectangular frame. An elastic rubber ring is arranged between the rectangular frame and the top cover. The top cover is provided with a ventilation hole. Connecting rods are installed at the left end and the right end of the top cover in a ball pair connecting mode correspondingly. The lower ends of the connecting rods are installed on the side walls of the rectangular frame in a ball pair connecting mode correspondingly. According to the dust collection device used for toothed paper cutting, toothed paper can be controlled in a totally closed mode and cut by a cutting device from the lower portion; dust is sealed by the upper rectangular frame covering the periphery of the toothed paper and the cutting device and is cleaned by an exhaust fan; and the rectangular frame adopts the vibration motor to vibrate the toothed paper, so that the dust attached to the toothed paper is shaken into the air and is conveniently pumped out by the exhaust fan.

The invention provides a riveting nut which is provided with a nut body. The inner wall of the nut body is provided with an internal screw thread; the riveting nut also comprises a connecting part; a first end of the connecting part is fixed on the nut body; the connecting part is of a spiral shape; the connecting part extends along the axial direction of the nut body; the riveting nut is also provided with a fixing part; the fixing part comprises a fixing plate and a positioning ring positioned on one end face of the fixing plate; a second end of the connecting part is fixed on the positioning ring; and the fixing part is provided with a through hole running through the fixing plate and the positioning ring. The riveting nut provided by the invention can be conveniently arranged on a board which is inconvenient to place a common nut, is firmly connected with a bolt and is difficult to fall off.

Disclosed are a combined type light lifting apparatus and a method for using same. The combined type lifting apparatus comprises four lifting machines, a hydraulic system and a control device. The lifting machines are provided with inverted oil pumps and are symmetrically placed at the four corners to form a rectangle. Hydraulic oil cylinders (23) of the lifting machine oil pumps are connected to the hydraulic system, and the hydraulic system is electrically connected to the control device. The combined type lifting apparatus adopts a split structure and is convenient to transport, field assembly is facilitated, the oil pumps can be examined conveniently, and parts can be replaced conveniently, and an operator can move the combined type lifting apparatus conveniently; the combined type lifting apparatus is simple in structure, small in size and flexible and convenient to use.

The invention relates to an LED (Light Emitting Diode) ceiling lamp, which is characterized in that a lamp body at least comprises a light-transmitting shell surface (1), a fixed base surface (2) and a lamp cap (3), wherein the fixed base surface is provided with an inner concave cavity (4) which is connected with the lamp cap (3). The LED ceiling lamp has the characteristics of high efficiency, low cost, convenience in installation and the like.

The invention discloses a novel reduction and fixation device for fracture of inferior orbital wall, the structure includes a first corner fixing hole, a first side fixing plate, a connecting head ofside plate, fixed through hole, first main fixing plate, second main fixing plate, second side fixing plate, second corner fixing hole, buckle-head connected plate of side plate; the first main fixingplate is arc-shaped; a left side is buckle with a right side of that second main fixing plate; a fix through hole is arranged through that joint; a right side fasten plate is fastened with a first side fix plate through a connecting head of that side plate; a fix through hole is arranged through that joint, the first side fixing plate is arc-shaped, the invention has the advantages of: as that device is provide with a circular arc main fixing plate compose of a buckle head connecting plate with a main board and a main board connecting buckle head, and a fixing through hole is arranged at theconnection part, so that the equipment can adjust the shape of the fixer, and the fixing property of the fixer to the whole body is not affected, and the fixer is convenient to use. The fixer is composed of a first side fixing plate with a connecting buckle head of the side plate and a second side fixing plate with a buckle head of the side plate.

The invention relates to the technical field of test pile tests, and discloses a double-pile casing structure facilitating test pile tests. The double-pile casing structure comprises an inner pile casing arranged on the outer surface of a cast-in-place pile in a sleeving mode, and an outer pile casing arranged on the outer circumference of the inner pile casing; annular spacer area is defined between the outer pile casing and the inner pile casing; the upper portion of the spacer area is provided with an upper opening; the lower portion of the spacer area is provided with a lower opening; thelower portion of the spacer area is provided with a lower closing structure; the lower closing structure closes the lower opening of the spacer area; the upper portion of the spacer area is provided with an upper closing structure; the upper closing structure closes the upper opening of the spacer area; an isolation block is arranged on the outer surface of the inner pile casing in a protruding mode; and a gap is formed between the isolation block and the inner surface of the outer pile casing. By arranging the isolation block, on the one hand, the gap between the inner pile casing and the outer pile casing can be controlled, on the one hand, the inner pile casing and the outer pile casing can be fixed, thus, the stability between the inner pile casing and the outer pile casing in the construction process is ensured, and the structure has high practicability.