776 results about "Double tube" patented technology

The invention discloses a double-liquid water-soluble polyurethane ground grouting flowing water blocking method. The method comprises the steps that A, ground penetrating roadway drilling construction is conducted; b, a double-pipe grouting device is installed; c, pressing water before grouting; step D, preparing a double-liquid water-soluble polyurethane grouting liquid; e, the double-fluid water-soluble polyurethane grouting fluid is mixed through a double-pipe grouting device and then grouted to a target position; and F, water pressing is conducted after grouting. The method is a more efficient, environment-friendly and economical water gushing treatment scheme, the treatment effect of flowing water plugging in the complex underground environment can be effectively enhanced, and therefore construction and operation safety of the deep-buried tunnel is guaranteed.

The utility model discloses an asynchronous floating mechanism of a double-pipe blind-plug connector and a cabinet type liquid cooling server, which belong to the technical field of blind-plug connectors and comprise two fixed pipelines, two floating pipelines, two supporting seats, a guide block and a mounting frame. The two supporting seats are slidably installed on the two sides of the guide block. A guide hole is formed in the guide block; a guide pin is mounted on the fixed pipeline; a mounting seat and a supporting column are radially mounted on the mounting frame in a floating manner; and a spring is sleeved on the supporting column. The guide hole guides the guide pin, so that the mounting seat is radially adjusted in a floating manner, radial alignment of the floating pipeline and the fixed pipeline is realized, and accurate insertion of the blind insertion joint is ensured; the spring supports the supporting seat, so that the blind plugging connector is ensured to be fully and thoroughly plugged; the two supporting seats are installed on the two sides of the guide block in a front-back sliding mode, axial asynchronous floating adjustment of the two floating pipelines can be achieved, and the situation that plugging of a single-side blind plugging connector is not in place is avoided. The problem of mismatching caused by machining tolerance and assembling factors in the butt-inserting process of the blind-inserting connector is effectively solved.

The present invention relates to the technical field of medical devices, and in particular to a cystoscope capable of accurately locating the position of a double-J tube, comprising a handle portion and a mirror body portion, a clamp channel being arranged in the mirror body portion, the mirror body portion comprising an operating section and a main mirror tube section, an imaging system for photographing images being arranged at the end of the operating section; a tube clamping assembly is also arranged in the operating section, the tube clamping assembly comprises a limit plate and a push component, the limit plate is connected to the push component, and the clamp channel is arranged above the limit plate; a limit card slot is also arranged along the central axis of the limit plate, baffles are also arranged on both sides of the limit card slot body, and the double-J tube can pass through the baffles. In the removal operation of the double-J tube, when the double-J tube passes through the baffle, the mirror body portion is pulled backward, and in this process, the length of the double-J tube above the limit plate is gradually shortened, the originally curled end of the double-J tube can be gradually stretched, and the end of the double-J tube can be exposed on the surface of the limit plate, thereby improving the convenience of removing the double-J tube.

The utility model relates to the technical field of pipe cutting devices, in particular to an automatic cutting device for a three-way pipe fitting. According to the technical scheme, the device comprises a base, a sliding table is slidably mounted at the top of the base, a single-pipe-head clamping plate is fixedly mounted at the top end of the sliding table, a protective baffle is fixedly mounted on the side, away from the sliding table, of the top of the base, a transverse moving frame plate is slidably mounted at the top end of the sliding table, and a first rubber column head is clamped and inserted into the transverse moving frame plate; a double-pipe-head clamping assembly is fixedly installed at the top end of the base, two clamping plates are arranged on the double-pipe-head clamping assembly, and second rubber column heads are fixedly installed on the inner side walls of the clamping plates. By means of the single-pipe-head clamping plate and the double-pipe-head clamping assembly, any port of the three-way pipe can be clamped and fixed, the pipe positioning difficulty is reduced, the rubber column heads support the inner walls of the pipe heads, the deformation probability during pipe cutting can be reduced, cutting is convenient, and the production efficiency is effectively improved.

The invention relates to a double-tube-plate heat exchanger which comprises a bottom frame and a shell fixedly arranged on the bottom frame, two tube plates are arranged in the shell, a plurality of heat exchange tubes are arranged between the two tube plates, and a tube pass fluid inlet, a tube pass fluid outlet, a shell pass fluid inlet and a shell pass fluid outlet are formed in the shell. A multifunctional sliding piece is arranged between the two tube plates in the shell, a sliding piece driving device is arranged outside the shell, a first sealing device is arranged between the shell and the tube plates, and a second sealing device is arranged between the tube plates and the heat exchange tubes. By arranging the multifunctional sliding sheets and the sliding sheet driving device, the outer walls of the heat exchange tubes can be cleaned on the premise that the tube plates are not detached, it is guaranteed that the interior of the heat exchanger is clean and free of impurities, when the heat exchange tubes are damaged, it can be accurately determined that one or more heat exchange tubes are damaged at a time, the damaged heat exchange tubes can be directly detached and replaced conveniently, and the heat exchange efficiency is improved. And the maintenance difficulty is greatly reduced.

An internal floating piston (IFP) having circumferential seal groove 2 on its external surface between two walls 3, 4 of the external surface, and an anti-tipping feature 8 increasing a length of said

An inner pipe (2) is designed for a heat-transferring double pipe that exchanges heat between a fluid that flows through the interior of the inner pipe and a fluid that flows between the inner pipe and an outer pipe (10) that surrounds the inner pipe. The inner pipe has a first region (21) and a second region (22), which have transverse cross-sectional shapes that differ. The first region has a plurality of first protruding parts (211) that protrude outward and form a first recess-protrusion shape in which locations of the first protruding parts are offset helically in a longitudinal direction. The second region has a plurality of second protruding parts (221) that protrude outward and form a second recess-protrusion shape, in which locations of the second protruding parts are offset helically in the longitudinal direction. The number of second protruding parts is greater than the number of first protruding parts.

The invention discloses a suspended small cased well eccentric integrated double-pipe separated injection pipe column and a separated layer water injection method thereof, and aims to improve the later testing and adjusting success rate of small-diameter separated injection construction and prolong the separated injection validity period. The separate injection pipe column comprises an outer layer pipe and an inner layer pipe. The outer layer pipe comprises a conventional oil pipe, a double-flow-channel eccentric water distributor, an outer connecting sleeve, an adapter connector, a small-diameter oil pipe, a small-diameter packer, a double-acting injection valve, a small-diameter check valve, a screen pipe and a screwed plug which are sequentially connected from top to bottom. The inner-layer pipe comprises a first oil pipe connected to the lower inner end of the double-flow-channel eccentric water distributor and a rear-throwing ball type check valve. The layered water injection method comprises the steps of tripping in a tubular column, pressing and setting, measuring a water absorption index, putting a valve ball to control a water injection channel, and flushing a well. The method can achieve accurate layered water injection, improve the water injection efficiency and prolong the validity period of layered water injection, and is suitable for layered water injection operation of small cased wells.

The invention relates to the technical field of medical instruments, in particular to a cystoscope capable of accurately positioning double J tubes, which comprises a handle part and a cystoscope body part, a forceps channel is arranged in the cystoscope body part, the cystoscope body part comprises an operation section and a main cystoscope tube section, and an imaging system for shooting images is arranged at the end part of the operation section; a pipe clamping assembly is further arranged in the operation section and comprises a limiting plate and a pushing part, the limiting plate is connected with the pushing part, and the clamp channel is arranged above the limiting plate; a limiting clamping groove is further formed along the center axis of the limiting plate, baffles are further arranged on the two sides of a groove body of the limiting clamping groove, and the double-J pipe can pass through the baffles. In the pulling-out operation of the double-J tube, when the double-J tube passes through the baffle and then pulls the mirror body part to move backwards, in the process, the length of the double-J tube above the limiting plate is gradually shortened, the originally curled end part of the double-J tube can be gradually stretched, and the end part of the double-J tube can be exposed out of the surface of the limiting plate, so that the taking-out convenience of the double-J tube is improved.

The invention relates to the technical field of foundation pit support water stop or foundation reinforcement construction, and discloses double-pipe jet grouting pile equipment with a positioning mechanism, which comprises a cutting and stirring mechanism, the cutting and stirring mechanism further comprises a drilling pipe, an inner pipe is fixedly connected to the inner wall of the drilling pipe, high-pressure cement paste enters the inner pipe and extrudes a first pressure bearing plate, the first pressure bearing plate moves downwards, and a second pressure bearing plate moves downwards; a conical rod is driven to move downwards through a sliding rod and a connecting plate, so that a limiting groove clamped by the conical rod is opened, a first pressed plate descends, the connecting rod is driven to enable a piston plate to descend, hydraulic oil in a first hydraulic pipe flows back into a hydraulic box, a first piston rod and a first partition plate are driven to ascend, a hole in a telescopic cutter is opened, and high-pressure gas enters the telescopic cutter through the hole; and when the device rotatably sprays high-pressure cement paste, the telescopic cutter can rotatably ascend to cut surrounding soil and gravel, and the problems that deep soil is relatively compact, the cement paste cannot be sprayed to a specified distance, a solidified cement pile is wide in upper part and narrow in lower part, and the stability is relatively poor are avoided.

A fluid damper having a damper housing with a first and a second fluid volume, and a damping piston located within the damper and separating the first and second fluid volume. The damper piston has a piston fluid pathway formed therethrough and between the first and second fluid volume. The fluid damper includes a fluid accumulator having a pressurizable gas volume and an accumulator fluid volume isolated from one another by a separation member. The fluid damper has a first fluid pathway extending solely between the first fluid volume and the accumulator fluid volume, and the fluid damper has a second fluid pathway extending solely between the second fluid volume and the accumulator fluid volume. A flow control valve is located in at least one of the first and the second fluid pathways, and the flow control valve has a non-zero threshold value.

The utility model relates to the technical field of teeth, in particular to an appliance suitable for maxillary anterior teeth. Comprising an embedded tooth, a mesio-middle adjacent tooth and two casting belt rings, the embedded tooth is located on the inner side of the bottom of the mesio-middle adjacent tooth, the casting belt rings are located at the two ends of one side of the embedded tooth, a Nand palate support is welded between the two casting belt rings, double-tube buccal tubes are welded to the ends, away from each other, of the two casting belt rings, and a loop is welded to the bottom of each double-tube buccal tube. And a bending piece is fixed on the inner side of the Nand palate support. According to the utility model, maxillary anterior teeth which are impacted on the lip side and are closer to adjacent teeth can be drawn during use; meanwhile, the positioning single-curved labial arch is adopted to firstly draw the embedded tooth towards the labial side, direct traction and force application are carried out, the oral mucosa is prevented from being pressed, the positioning single-curved labial arch is connected with the single-curved labial arch in a welded mode through a loop, the loop part is located at the position of the maxillary premolar, and after the embedded tooth is basically exposed out of the labial mucosa, the embedded tooth can be continuously drawn backwards and downwards until the embedded tooth is basically drawn in place.

A double pipe for heat exchange in which an inner pipe is inserted into an outer pipe to enable heat exchange among a fluid flowing through an inner flow path in the inner pipe and an outer flow path between the inner pipe and the outer pipe. In a straight pipe portion extending linearly in a pipe lengthwise direction, a pipe wall of the inner pipe has a plurality of convex portions in a circumferential direction so as to form a concave / convex cross-sectional shape, and in the pipe wall of the inner pipe, an inclined pipe wall portion whose convex portion extends spirally in the pipe lengthwise direction and a turbulence-generating pipe wall portion whose convex portion has a lead angle different from that of the inclined pipe wall portion are formed in series in the pipe lengthwise direction.

A fluid damper having a damper housing with a first and a second fluid volume, and a damping piston located within the damper and separating the first and second fluid volume. The damper piston has a piston fluid pathway formed therethrough and between the first and second fluid volume. The fluid damper includes a fluid accumulator having an accumulator fluid volume. The fluid damper has a first fluid pathway extending between the first fluid volume and the accumulator fluid volume, and the fluid damper has a second fluid pathway extending between the second fluid volume and the accumulator fluid volume. A flow control valve is located in at least one of the first and the second fluid pathways, and the flow control valve has a non-zero threshold value.

The invention discloses a concentric double-pipe continuous negative pressure sand washing device and process. The device comprises a pump truck and a sand washing pipe column structure. The pump truck is used for providing sand washing liquid pressure and displacement for the sand washing pipe column structure; the sand washing pipe column structure comprises a concentric double pipe column, a process pipe, a negative pressure injection pump and a sand washing nozzle. A process pipe; wherein an annular liquid return channel is formed between the outer-layer oil pipe of the concentric double-pipe column and the inner-layer oil pipe of the concentric double-pipe column; a negative-pressure injection pump and a sand washing nozzle are mounted at the bottom of the inner-layer oil pipe; the sand washing fluid shunting channel is divided into two channels; one part of sand washing fluid enters the well bottom through the self-sealing well mouth and the inner-layer oil pipe in sequence, and the sand washing fluid makes contact with the sand surface of the well bottom through the sand washing nozzle; and the other part of the sand washing fluid generates negative pressure through the negative pressure injection pump to discharge the formation produced fluid and mixed fluid of the sand washing fluid and shaft sand grains out of the ground through the annular fluid return channel and the process pipe, and through the concentric double-pipe structure and the negative pressure injection pump, internal circulation of the sand washing fluid and continuous negative pressure sand washing are achieved.

The invention relates to a vacuum switch circuit breaker. The vacuum switch circuit breaker comprises a protective shell and a supporting shell, the double-tube vacuum bag is positioned in the shell and comprises a vacuum arc extinguish chamber and a vacuum insulation chamber; wherein the vacuum arc-extinguishing chamber comprises a static conducting rod and a movable conducting rod, the static conducting rod comprises a first penetrating end and a first contact end, the first penetrating end penetrates through one end of the vacuum arc-extinguishing chamber, the movable conducting rod comprises a second penetrating end and a second contact end, and the second penetrating end penetrates through the other end of the vacuum arc-extinguishing chamber and extends to the vacuum insulation chamber; the first contact end of the static conducting rod and the second contact end of the movable conducting rod are oppositely arranged and are spaced by a distance; the vacuum insulation chamber comprises an insulation push rod, one end of the insulation push rod penetrates through the other end of the vacuum insulation chamber, and the other end of the insulation push rod is connected with the second penetrating end of the movable conducting rod; and the transmission and control mechanism is connected with one end of the insulating push rod. By arranging the vacuum insulation chamber, the insulation push rod is packaged, and the insulation performance is better.

The invention discloses an assembly and air tightness detection all-in-one machine for a plastic double-tube interface, and belongs to the technical field of infusion bag generation equipment, and the assembly and air tightness detection all-in-one machine for the plastic double-tube interface comprises a mounting plate, a mounting rack, a hot pressing mechanism, a detection mechanism and a transmission mechanism. According to the assembling and air tightness detecting all-in-one machine for the plastic double-pipe connector, the mounting plate, the mounting frame, the hot-pressing mechanism and the detecting mechanism are arranged, and the plastic double-pipe connector piece and the infusion bag body can be tightly connected through the hot-pressing mechanism; the detection mechanism can be used for detecting the sealing performance of the connected plastic double-pipe connector piece and the infusion bag body, so that the production efficiency is improved, the detection result is slightly influenced by human factors, and the accuracy and consistency of detection can be ensured; and the all-in-one machine integrates assembly and detection, so that the occupied area of equipment is reduced, and the production cost is saved.

The invention discloses a fastening device for water conservancy and hydropower construction, relates to the field of water conservancy and hydropower construction auxiliary equipment, and aims to solve the problems of low pipeline butt joint precision, difficulty in parallelism control and poor distance adjusting efficiency in the existing two-group double-pipe parallel construction. The device comprises a bottom plate, a mounting frame, a sliding device, an adjusting device, a clamping device and a control panel, and buffer springs are arranged in supporting legs of the mounting frame. The adjusting device drives the clamping assembly through the bidirectional threaded rod, and coaxiality control over segmented splicing of the long pipeline is achieved. The sliding device is matched with an electric push rod through a sliding rail, and the parallel distance between the two spliced long pipes is adjusted in an electric control mode through a control panel. The device adapts to various common pipe diameters, can be assembled and disassembled by a single person, is stable in fixation, can resist construction vibration and pressure, conforms to related specifications, remarkably improves the construction efficiency, reduces the equipment cost, and is suitable for cooling pipes, water supply pipes, grouting pipes and other scenes.

The present invention discloses an inner-rotating and outer-braking double-tube drilling device, which belongs to the drilling machinery for pile foundation engineering; the inner drill rod of the braking device is connected to the power head of the ground drilling rig, and is connected to the hydraulic down-the-hole hammer drill bit at the bottom, so as to transmit the torque to the hydraulic down-the-hole hammer drill bit; the outer brake pipe is connected to the outer ring of the central swivel joint, connected to the ground section by section, and stopped by the stop frame on the power head. When the inner drill rod rotates, the inner ring of the central swivel joint rotates, and the outer ring of the central swivel joint does not rotate due to being connected to the outer brake pipe, so that the hydraulic oil pipe outside the outer brake pipe does not rotate, so that the hydraulic oil pipe does not entangle the drill tool, and the hydraulic down-the-hole hammer drill bit can continuously rotate in one direction for drilling. The present invention has a simple structure and is easy to operate. It solves the directional problem that the functional hydraulic pipeline outside the drill tool in the hole does not entangle the drill tool when the drill tool continuously rotates in one direction during drilling, and fills the world gap in this industry.

A squat silo double-pipe folding material distribution device comprises a silo, a transfer granary, a center grain inlet pipe, a supporting sleeve and a winch or a pneumatic hoist. A plurality of in-bin feeding pipes are connected to the side wall of the center grain inlet pipe in the vertical direction at intervals in a circumferential arrangement mode and communicated with the interior of the center grain inlet pipe, each in-bin feeding pipe is externally connected with a folding material distribution groove, and turnover valves synchronously rotating with the folding material distribution grooves are arranged in the in-bin feeding pipes. The winch or the pneumatic hoist drives the traction rope to further control the rotation angle of the turnover valve in the folding material distribution groove and the feeding pipe in the bin, and it is kept that in the whole grain feeding process, flowing of grains is limited, and free flowing is not generated. And meanwhile, grain feeding starts from the bottom of the silo and is gradually distributed upwards, the folding of the material distribution groove is beneficial to conveying the grain to the edge of the silo in a longer distance, the occurrence of the grain grading phenomenon is reduced, and automatic grading and crushing are avoided when the grain is fed into the grain silo disclosed by the utility model.

The utility model belongs to the technical field of optical gauges, and particularly discloses a device for calibrating the optical axis of a binocular telescope. A double-tube front lens of the device is fixed on the upper portion of an adjusting frame, a collimator, a supporting seat and the adjusting frame are sequentially arranged on a workbench, a cross reticle I is arranged in the collimator, cross reticles II are arranged in lens bodies of the double-tube front lens, and a supporting flat plate for placing a binocular is arranged at the top end of the supporting seat. Three adjusting screws I in threaded connection are evenly distributed on a base I of the adjusting frame in the circumferential direction, a bottom sleeve is vertically fixed to the middle of the upper surface of the base I, the lower portion of a lifting rod extends into the bottom sleeve in a sliding mode, a set screw is arranged on the side wall of the bottom sleeve to lock the lifting rod, and a double-tube front mirror is detachably and fixedly connected to the top end of the lifting rod. According to the utility model, the binocular telescope can be directly placed on the supporting flat plate of the supporting seat to directly detect the optical axis deviation, and the device has the characteristics of simple structure, convenient detection, flexible adjustment and low cost.

The invention discloses a method for adding rare earth into a low-alloy high-strength steel crystallizer, which belongs to the technical field of application of rare earth in steel, and is mainly characterized in that rare earth is added in a manner of symmetrically feeding rare earth wires on two sides of a slab casting machine single-flow crystallizer by adopting a double-pipe wire feeder at a position which is 1 / 2 of the thickness and is 100mm away from a water gap in the width direction; the rare earth wires are 65% Ce-35% La mixed rare earth wires with the diameter being 2.5 mm and wrapped with iron sheets. According to the method for adding the rare earth into the low-alloy high-strength steel crystallizer, the liquid level of the crystallizer is stable in the whole wire feeding process, the storage amount of the rare earth in the steel is increased, water gap flocculation is avoided, the rare earth is evenly distributed on the whole section of a casting blank, the internal quality of the casting blank is improved, and reference can be provided for development of rare earth steel with the high storage amount of the rare earth.

The invention discloses a double-tube extrusion bottle cap, and relates to the technical field of bottle caps, the double-tube extrusion bottle cap comprises a hose and a bottle cap arranged at the opening end of the hose, the hose comprises an outer tube and an inner tube, and the outer tube is provided with a first liquid outlet hole for discharging liquid in the inner tube and a second liquid outlet hole for discharging liquid in the outer tube; the bottle cap comprises a lower cap body rotationally connected with the hose, an upper cap body is arranged on the lower cap body in an overturning mode, and a first liquid outlet and a second liquid outlet are formed in the lower cap body; in the rotating stroke of the bottle cap, the following three liquid outlet modes can be achieved: mode 1, when the first liquid outlet is communicated with the second liquid outlet hole and the second liquid outlet is communicated with the first liquid outlet hole, liquid in the inner tube and liquid in the outer tube can be discharged at the same time; in the second mode, when the first liquid outlet hole is communicated with the first liquid outlet, the liquid in the inner pipe can be discharged; and in the third mode, when the second liquid outlet hole is communicated with the second liquid outlet, the liquid in the outer pipe can be discharged.

The invention discloses a method for switching a double-tube Buck-Boost circuit mode, and relates to the field of circuit switching. In order to solve the problem that an existing Buck-Boost circuit is complex in mode switching mode, the output voltage of an IGBT switching tube S1 and the output voltage of an IGBT switching tube S2 are collected, and the duty ratio dbuck of the IGBT switching tube S1 and the duty ratio dboost of the IGBT switching tube S2 are obtained respectively; and judging whether 1-dboost-dbuck is less than 0 or not, if so, enabling the duty ratio dbuck of the IGBT switch tube S1 to be equal to 1, and adjusting the duty ratio dboost of the IGBT switch tube S2 according to the voltage reference value and the output voltage of the IGBT switch tube S2, and at the moment, the IGBT switch tube S1 is in a boost mode, and if not, enabling the duty ratio dboost of the IGBT switch tube S2 to be equal to 0, and adjusting the duty ratio dbuck of the IGBT switch tube S1 according to the voltage reference value and the output voltage of the IGBT switch tube S1, and at the moment, the IGBT switch tube S1 is in a buck mode. The invention is used for smoothly realizing buck-boost switching.

The invention relates to a suspension tunnel, and discloses a double-pipe suspension tunnel vehicle-rail-pipe-cable coupling system dynamic response analysis method, which comprises the following steps of: constructing a space vehicle subsystem motion equation, establishing a rail-pipe-anchor cable subsystem motion equation, constructing a wheel-rail contact equation, and solving to obtain a vehicle transmission load borne by a rail; a double-pipe suspension tunnel vehicle-rail-pipe-cable coupling system dynamic model is constructed; and calculating a wave load by utilizing a Morrison equation, establishing a vehicle-rail-pipe-cable coupling system kinetic equation under the action of the wave load, and solving by adopting a separation iteration method to obtain the dynamic response of the pipe body, the anchor cable and the vehicle of the double-pipe suspension tunnel. According to the method, the enhancement effect of the double-pipe linkage structural component on the transverse rigidity of the double-pipe suspension tunnel and the train eccentric load of the suspension tunnel are fully considered, the dynamic equation of the coupling system is established, the dynamic response of the system can be accurately calculated, the calculation precision and efficiency are both considered, and theoretical support and a technical path are provided for design and construction of the suspension tunnel.

The invention discloses a heat pump type efficient dehumidification device with a waste heat recovery function, and belongs to the technical field of efficient dehumidification devices. A temperature locking cavity is formed in the center of the interior of a dehumidification base, a first hot-pressing dehumidification box and a second hot-pressing dehumidification box are symmetrically arranged at the two ends of the temperature locking cavity, heat pump storage boxes are arranged at one ends of the hot-pressing dehumidification boxes side by side, and a flow guide center frame is arranged in the center of the interior of the second hot-pressing dehumidification box; the device has the remarkable advantages that firstly, a high-temperature primary dehumidification and low-temperature secondary dehumidification grading mode is adopted, the design of a zigzag flow channel and a symmetrical cavity is matched, the dehumidification efficiency is high, continuous operation can be kept during cavity dehydration, and constant temperature and low humidity of the environment are ensured; secondly, a whole-process waste heat utilization system is constructed, cold water is converted into hot water through cold water spraying, heat exchange arc piece circulation and the like, meanwhile, waste heat of a temperature locking cavity is recycled, and energy waste is reduced; and hot water and waste water are treated in order through the double-pipe hot drain valve, and environmental protection and economical efficiency are both considered.

The invention belongs to the technical field of sealing parts, and particularly discloses a polyurethane sealing part and a production process thereof.The polyurethane sealing part comprises a first connecting pipe and a second connecting pipe, and the end, close to the first connecting pipe, of the second connecting pipe is fixedly connected with an inserting ring. The problems that a traditional sealing piece is small in contact area and poor in coating performance are solved, a first connecting pipe and a second connecting pipe are positioned through an inserting ring to form mechanical embedding, a protruding ring of a sealing connecting ring is matched with an annular groove of an elastic ring and an expansion rubber ring to construct a physical sealing barrier, the contact area is increased, and when an extrusion assembly applies pressure, an external supply set injects viscoelastic fluid of an outer bag body into an inner cavity of the elastic ring; the driving elastic ring and the expansion rubber ring are internally expanded and externally hooped to doubly wrap and fill the interface gap, so that the plane-to-three-dimensional contact upgrade is realized, the stress is uniformly dispersed, and the expansion rubber ring can compensate the gap through elastic deformation to improve the sealing performance even if the pipeline is rusted and displaced.

1. The name of the design product: cosmetic packaging bottle (JY42 double tube bottle E-F series). 2. The use of the design product: for a cosmetic bottle. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

1. The name of the product of this design: Infusion warmer (Internet of Things double tube). 2. Purpose of the product of this design: used to heat and keep warm the liquid medicine during infusion. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The utility model discloses a concentric double-pipe leather cup type composite gas anchor, which relates to the field of oil exploitation, and comprises a centrifugal mechanism and a separation mechanism, the centrifugal mechanism comprises a plug, a lower joint, a centrifugal body and a cone, and the plug, the lower joint, the centrifugal body and the cone are sequentially connected through threads; the separating mechanism comprises an inner pipe, an outer pipe, an outer sleeve, a separating body and an upper connector, the lower end of the inner pipe is in threaded connection with the cone, the upper end of the inner pipe is freely suspended, the upper end of the outer pipe is in threaded connection with the separating body, the other end of the outer pipe is freely suspended, two ends of the outer sleeve are in threaded connection with the centrifugal body and the separating body respectively, and the upper connector is in threaded connection with the separating body. The underground gas-liquid separation device has an underground gas-liquid separation function, prevents gas from entering an oil well pump, reduces pump efficiency, avoids gas locking, and improves oil extraction efficiency.