271results about How to "Achieve sealing" patented technology

The application provides a one-way sealing ring, a sealing mechanism, a tail pipe top packer and a tail pipe cementing process, wherein the one-way sealing mechanism comprises a center pipe, an upper deformed sleeve arranged on the outer wall of the center pipe, a lower deformed sleeve arranged on the outer wall of the center pipe, the upper deformed sleeve and the lower deformed sleeve being spaced apart in the axial direction, a sealing element arranged on the outer wall of the center pipe, the lower end of the sealing element being in abutment with the upper end of the lower deformed sleeve, an expansion cone arranged between the upper deformed sleeve and the sealing element, a sealing groove being arranged on the inner wall of the expansion cone in the circumferential direction, a sealing ring being arranged in the sealing groove, a flow-off groove being arranged on the inner wall of the expansion cone in the axial direction, the flow-off groove penetrating through the upper end and the lower end of the expansion cone, and fluid being allowed to flow only in one direction from the upper end of the expansion cone to the lower end of the expansion cone along the flow-off groove, while the fluid under the packer is allowed to flow upward, the wellhead annulus is allowed to be pressurized for cement setting, the pressure reduction caused by volume shrinkage is prevented to prevent the stratum fluid from flowing out, and the cementing quality is ensured.

The application discloses a kind of bathroom cabinet processing plate waste crushing recycling equipment, including crushing box, fixed blade is equidistantly arranged between the inner surface of longitudinal two sides of crushing box, two first rotary shafts are symmetrically arranged between the inner surface of transverse two sides of crushing box, rotary blade is cross arranged between the fixed blade of first rotary shaft, transmission gear is installed at one end of two first rotary shafts and passes through crushing box, transmission gear is engaged, and driving motor is arranged on the outer surface of transverse side of crushing box.The beneficial effects of the present application are:the present application is reasonable in design, and the overall structure is stable and firm, which can not only realize the crushing and recycling of plate waste generated during the production and processing of bathroom cabinet, but also avoid the floating of debris and dust generated during the crushing and recycling of plate waste to the surrounding air, ensure the air quality of surrounding environment and the health of operators, and the crushed plate waste can be filled into the storage tank for centralized treatment.

The utility model discloses a corrugated paperboard box that storage space can expand, including box body and positioning lid, the four side outer walls on the positioning lid all are fixedly connected with cotton wool area, the four side outer walls on the bottom of box body all are fixedly connected with the first barb area of corresponding cotton wool area, the both ends of top of box body all are fixedly connected with first end plate, the both sides of top of box body all are fixedly connected with second end plate, the outer side wall on the first end plate and second end plate all are fixedly connected with the second barb area of corresponding cotton wool area, this storage space can expand corrugated paperboard box, can utilize the box cover of box body as the edge board to increase the internal space of box body, simple structure, convenient operation is suitable for using widely.

The application is suitable for the technical field of garden robots, and provides a garden robot, which comprises a recycling part and a cover plate part, wherein the recycling part comprises a channel assembly and a recycling container, the recycling container is used for containing materials, an opening structure is arranged on the recycling container, the recycling container has a recycling state and a pouring state; the cover plate part comprises a movable cover plate, the movable cover plate is movably connected with the recycling container, and the movable cover plate has a reset state and a shifted state; in the process that the recycling container is switched from the recycling state to the pouring state, the movable cover plate can be switched from the reset state to the shifted state under the action of gravity of the materials in the recycling container or under the action of gravity of the movable cover plate itself. The movable cover plate of the garden robot provided by the application can be switched from the reset state to the shifted state under the action of gravity of the materials in the recycling container or the action of gravity of the movable cover plate itself when the recycling container is switched from the recycling state to the pouring state, manual switching is not needed, and the use experience is good.

The utility model belongs to the technical field of steam ovens, and particularly relates to a self-cleaning oven which comprises an oven body, a steam system, a lighting system, a heating pipe system and a control system. The steam system comprises a boiler device which is installed on the rear side of the inner container and used for converting water into steam and providing the steam into the inner container to heat food; the boiler device comprises an air inlet pipe leading to the interior of the inner container, an air inlet pipe installation hole is formed in the inner container, the air inlet pipe is arranged in the air inlet pipe installation hole in a penetrating mode, a connecting piece is arranged at the end of the air inlet pipe, and an air inlet pipe sealing piece is arranged between the connecting piece and the side wall of the inner container and made of high-temperature-resistant materials. The connecting piece and the inner container are connected through the air inlet pipe fixing piece, so that the connecting piece enables the air inlet pipe sealing piece to abut against the inner container located on the edge of the air inlet pipe installation hole, the gap between the air inlet pipe and the inner container is sealed, air leakage of the inner container is avoided, the stability of the inner container during working is guaranteed, and normal operation of the steaming oven is guaranteed.

The invention provides a sealing gas circuit which extends between the low-pressure end of a gas compressor and a sealing cavity and comprises a high-speed shaft inner channel. The high-speed shaft inner channel is limited in the high-speed shaft by the pipe wall of the high-speed shaft, and a pressurizing structure protruding inwards is arranged on the inner side face of the pipe wall.

This utility model relates to the field of urea injectors, specifically disclosing a liquid inlet cap sealing structure for a urea injection assembly, including: a water jacket assembly, a valve body, a liquid inlet cap, and a sealing part. The valve body is composed of a wiring part, a coil part, and a liquid inlet pipe. The sealing part can be either a sealant with an integral filling structure or a component consisting of a first sealing ring and a second sealing ring for sealing. After sealing, it can prevent cooling water or external immersion water from seeping into the gaps between the wiring part and the liquid inlet pipe, as well as the gaps between the wiring part and the coil part, thus preventing water from entering and damaging the coil part and wiring part, thereby extending the service life of the valve body and reducing the failure rate.

The application discloses an anchor rod structure, a construction method of the anchor rod and an anchor rod body formed by the construction method. The anchor rod structure comprises a bus base material, a tension structure and a fixing structure. The fixing structure is located at the lower end of the bus base material and is used for anchoring the lower part of the anchor rod structure. The tension structure is located at the upper end of the bus base material and is used for tensioning and locking the bus base material. The outside of the bus base material is provided with an isolation structure. The inside of the isolation structure and the outside of the bus base material form a first annular structure. The anchor rod structure further comprises a side grouting pipe. The side grouting pipe extends from the top of the anchor rod structure to the bottom. The bottom of the side grouting pipe is communicated with the bottom of the first annular structure. The internal space defined by the first annular structure and the side grouting pipe is isolated from the outside of the isolation structure and the side grouting pipe, and forms a secondary grouting and back discharge channel. Therefore, the problem of water seepage of the anchor rod in the later period can be solved, and the difficulty of water stopping in the later period and the engineering cost can be solved.

The present disclosure relates to a cutterhead assembly and a slurry shield tunneling machine. The cutterhead assembly comprises a cutterhead (10), an electrode mounting seat (20) arranged on the cutterhead (10) and having a first through hole (21) penetrating through the thickness direction of the cutterhead (10), an emitting electrode (30) having a first electrode portion (31) and a second electrode portion (32), the first electrode portion (31) penetrating through the first through hole (21), the second electrode portion (32) being fixedly connected to the electrode mounting seat (20) through a first connecting piece (41), and a first sealing and insulating assembly (50) being compressed between the emitting electrode (30) and the electrode mounting seat (20) and between the emitting electrode (30) and the first connecting piece (41) to insulate and seal the emitting electrode (30) from the electrode mounting seat (20) and the first connecting piece (41).

The application provides a downhole supercritical carbon dioxide fracturing coal rock device and a construction method, which comprises a coal seam, a fracturing borehole, a hole blocking section, a hole sealing section, a fracturing section, a monitoring hole, a fracturing system, a temperature control system, a grouting system, a liquid carbon dioxide pressurizing system, a proppant mixing system, an extraction system and a data collector; the fracturing borehole is arranged on the coal seam and comprises the hole blocking section, the hole sealing section and the fracturing section; a plurality of monitoring holes are arranged on the coal seam and are spaced apart in the circumferential direction of the fracturing borehole; and the fracturing system is connected with the temperature control system. The proppant mixing system can improve the performance of the liquid carbon dioxide carrying proppant mixture, so that the proppant mixture effectively enters the fracturing fracture and maintains good flow conductivity. The temperature control system overcomes the difficulty in preparation of downhole supercritical carbon dioxide and can realize injection of carbon dioxide in a supercritical state into the fracturing coal seam.

The utility model belongs to the technical field of pipe shed steel frame, concretely relates to a mine laneway fabricated pipe shed steel frame, including steel pipe and grouting expansion assembly, is equipped with overflow booster hole on the side of steel pipe located in one side of steel pipe grouting hole, grouting expansion assembly is sleeved on the steel pipe outside overflow booster hole, grouting expansion assembly is composed of rubber expansion ring, fixed ring, temperature sensing lock ring, both ends of rubber expansion ring are clamped in the inside of fixed ring, and one end of temperature sensing lock ring is clamped and connected between the outside surface of rubber expansion ring and fixed ring, the other end of temperature sensing lock ring is formed with deformation compression section. Grouting expansion assembly is added to the outer wall of steel pipe, realizes slurry pressure trigger type plugging, with the two-stage sealing mechanism of slurry pressure expansion and temperature control locking, solves the problem that slurry flows back and seeps from the gap between pipe wall and aperture.

The application relates to a plate-to-plate connector tape changing machine which comprises a platform, a conveying frame, a conveying frame, a tape tearing assembly, a transfer assembly and a heat sealing assembly, the conveying frame and the conveying frame are fixedly connected to the upper end of the platform, the upper end of the conveying frame is provided with a conveying groove, the upper end of the conveying frame is provided with a conveying groove, the length direction of the conveying groove is parallel to the length direction of the conveying groove, the conveying groove is used for conveying old packaging materials, the conveying groove is used for conveying new packaging materials, the tape tearing assembly, the transfer assembly and the heat sealing assembly are fixedly connected to the upper end of the platform, the tape tearing assembly is used for winding old upper tapes, the transfer assembly is used for transferring products in the conveying groove to the conveying groove, and the heat sealing assembly is used for heat sealing new upper tapes. Old packaging materials are conveyed in the conveying groove, the tape tearing assembly winds the old upper tapes to expose the products, new packaging materials are conveyed in the conveying groove, the transfer assembly transfers the products from the old packaging materials to the new packaging materials, the heat sealing assembly fixes the new upper tapes and the new packaging materials, the products are sealed, the tape changing of the products is completed, and the packaging efficiency is improved.

This application discloses a waterproof pipe gallery structure, belonging to the field of pipe galleries. The waterproof pipe gallery structure is constructed by sequentially splicing multiple pipe bodies. The structure includes: a shielding ring fitted at the joint of two adjacent pipe bodies, the shielding ring being slidable on the pipe body; elastic sealing rings fitted on both adjacent pipe bodies, the elastic sealing rings being located on both sides of the shielding ring; and sliding cylinders covering each of the elastic sealing rings, each sliding cylinder being threadedly connected to the shielding ring. This waterproof pipe gallery structure reduces water seepage at pipe gallery joints and facilitates connection.

The invention relates to a preparation method of a phosphorus defect bimetallic oxygen evolution catalyst. The preparation method comprises the following steps: S1, dissolving 2.4 mmol of nickel chloride hexahydrate, 0.8 mmol of vanadium chloride and 300mg of urea in 80ml of deionized water, and uniformly stirring for 10 minutes; s2, putting a product obtained in the step S1 and foamed nickel into a 100ml reaction kettle, reacting at 120 DEG C for 12 hours, and drying in a drying box after reaction; s3, putting the product in S2 and 0.8 g of sodium dihydrogen phosphate into a tubular furnace, heating to 350 DEG C at a heating rate of 3 DEG C / min in an argon atmosphere, and reacting for 3 hours to obtain nickel vanadium phosphide loaded foamed nickel; and S4, the product obtained in the S3 is put into a sodium borohydride solution to be soaked for 30 min, the product is taken out and dried, and a final product, namely the nickel vanadium phosphide loaded foamed nickel with the vacancy defect, is obtained.

This utility model relates to the field of sealing structure technology, specifically an adaptive sealing structure, including a cylinder. A fixing plate is fixedly sleeved on the outside of the cylinder. Both sides of the fixing plate are connected to L-shaped sealing gaskets, which are fitted onto the outside of the cylinder. Several springs are arranged on both sides of the outer wall of the fixing plate, with the other end of each spring fixedly connected to the side of the sealing gasket parallel to the fixing plate. A rigid metal plate is embedded inside the side of the sealing gasket parallel to the fixing plate, and a flexible rubber gasket is located on the side of the sealing gasket perpendicular to the fixing plate. Multiple fixing components are arranged around the circumference of the outer wall of the cylinder. This adaptive sealing structure solves the problem that existing sealing structures lack adaptive capability, and in actual use, thermal expansion and contraction can affect their sealing performance, leading to pipeline leaks and significant limitations in application.

The application discloses a butterfly valve with good sealing performance, and belongs to the field of valves. The butterfly valve with good sealing performance comprises a valve body, a valve rod rotatably installed on the valve body, and a butterfly plate connected with the valve rod. The butterfly plate comprises a butterfly frame, side plates connected to the butterfly frame, a cutoff plate slidingly connected to the butterfly frame, and a flexible connecting piece connected between the butterfly frame and the cutoff plate. The butterfly frame is fixedly connected to the valve rod. An inner wall of the valve body is provided with a sealing ring for abutting against the cutoff plate. The inner diameter of the sealing ring gradually decreases from a side close to the butterfly plate to a side far away from the butterfly plate. The butterfly frame is internally provided with a moving mechanism for driving the cutoff plate to move axially along the valve body. The valve rod is provided with an adjusting mechanism for controlling the operation of the moving mechanism. The application has the effect of improving the durability of the butterfly valve and improving the sealing performance of the butterfly valve.

The utility model relates to the field of glue brushing devices, in particular to a glue brushing device based on GRG hyperboloid gradient diffuser surface treatment. The utility model provides the glue brushing device based on GRG hyperboloid gradient diffuser surface treatment, which is convenient to flexibly combine and use. Comprising a liquid storage box, a brush and pressing pieces, the detachably combined brush is assembled on the lower portion of the liquid storage box through a mounting groove, clamping grooves used for mounting the pressing pieces are formed in the inner wall of the mounting groove at intervals, and the pressing pieces are used for axially clamping and limiting the assembled brush. By the adoption of the structure of the extensible spliced single brush assemblies and the T-shaped installation grooves, rapid combination and installation of the multiple single brushes are supported so that the brushes with different wide faces can be achieved through combination, liquid guide grooves between the brushes with the different wide faces can be sealed through the synergistic effect of spring clamping blocks of pressing pieces and sealing gaskets, and use is flexible and convenient; stepless adjustment of the brushing angle is achieved by pressing the button, so that an operator can complete continuous glue brushing operation of a complex curved surface in a single-hand holding state.

The application belongs to the field of fastener quality inspection, and particularly relates to a sleeve air tightness detection device, which comprises a rack, a linear reciprocating mechanism and an air tightness detection mechanism; wherein the rack is provided with a positioning base for placing one end of a workpiece to be detected with a plug; the execution end of the linear reciprocating mechanism is provided with a gas supply pressure head for plugging the end of the workpiece to be detected away from the plug; the air tightness detection mechanism comprises a controller, a pressure controller connected to a corresponding pipeline, a pressure switch and an electromagnetic valve, and the pressure controller, the pressure switch and the electromagnetic valve are in communication connection with the controller. The sleeve air tightness detection device can replace the traditional manual detection mode, significantly improve the detection quantity per unit time, adopt a standardized detection process and a high-precision sensor, avoid misjudgment or missed detection caused by inconsistent human judgment, reliably detect the sleeve with air leakage defects, and prevent defective products from flowing into subsequent processes or causing faults in field use.

The utility model discloses a high pressure is with double sealed structure check valve, including valve body, spring, valve, valve seat, end cover, screw nut and compression nut, the inside of valve body is provided with spring, the inside of valve body is provided with valve, it is connected through screw thread between valve body and end cover, the valve seat is inlayed in end cover. The device is composed of valve seat and valve and forms the conical surface sealing pair, the valve seat is inlayed in end cover, and the sealing part of valve includes the conical surface part of valve seat and end cover, the valve seat is PEEK non -metal material, and it is the effect of main sealing, and end cover is metal material, and it is the effect of vice -sealing, and provide certain support effect simultaneously, and the valve seat and valve form plane sealing pair, prevent the medium and leak, and the sealing force has end cover thread pre -tightening force to provide, and compression spring acts on valve, and its effect is to provide certain initial sealing force, and its effect two is when medium reflux, and help valve fast closing and realize sealing.

The utility model relates to the technical field of assembled house, concretely to a new -type composite wallboard for low -rise assembled steel structure house, include: wallboard, connecting piece, connecting piece includes first screw rod and tension structure, first screw rod and tension structure clasp, be used for in horizontal direction tension adjacent two wallboards, fixed part, fixed part is used for the fixation between wallboard and steel structure main part, the utility model discloses, utilize the clasp of second screw and first screw rod, can realize the fixation of adjacent two wallboards, guarantee the size same of the joint gap between wallboard, utilize the clasp of second screw and first screw rod, can drive two sealing pieces and press mutually, realize the sealing of wallboard joint gap, can avoid the movement in horizontal direction between wallboard simultaneously, through setting up the cushion block between wallboard top surface and upper clamping groove, can avoid the up and down movement of wallboard, can be convenient for post -stage dismounting simultaneously, the repeated use of wallboard is convenient.

The utility model relates to the technical field of instrument protection, in particular to a petroleum wellhead instrument heat preservation protective cover. The petroleum wellhead instrument heat preservation protective cover comprises a protective box, a rotationally-connected box door is installed on the front box face of the protective box, and a wire inlet hole is formed in the side wall of the protective box; and a sealing part is arranged in the wire inlet hole. Compared with a traditional sealing plaster or anti-explosion sealing joint which seals a wire inlet hole formed in the side wall of the protection box, the heat preservation protection cover for the petroleum wellhead instrument has the advantages that the annular elastic liquid bag is of an elastic structure, and the expanded annular elastic liquid bag can rapidly fill a gap between a pressure guide pipe and a threading pipe and achieve sealing of the gap; cold air outside the protection box is effectively prevented from entering the protection box through a gap, the annular elastic liquid bag of an elastic structure solves the problem that sealing of the annular elastic liquid bag fails due to vibration of the pressure guiding pipe or the protection box in the structural form, and meanwhile the annular elastic liquid bag can adapt to pressure guiding pipes with different diameters.

The invention discloses a land surveying and mapping calibration device convenient to operate, and belongs to the technical field of land surveying and mapping calibration. A pressing plate is horizontally and fixedly mounted at the top end of the inserting rod, a mounting rod is vertically and fixedly mounted on the top wall of the pressing plate, and a marker post is arranged at the top end of the mounting rod; in the process that the threaded rod is rotated to adjust the height of the marker post, the piston rod moves downwards, on one hand, the deep anchoring clamping rod is mechanically driven to transversely stretch out to penetrate into soil according to the wedge-shaped principle, and deep anchoring is formed; on the other hand, the piston rod serves as an air pump piston to compress air in the cavity, the pneumatic telescopic rod on the earth surface is driven by the air supply mechanism to stretch and abut against the ground, and triangular support of the wide base is formed. The composite fixing mode of deep ground gripping and ground surface foundation expansion effectively solves the problem that a traditional surveying and mapping rod shakes due to the fact that the head is heavy and the bottom is light, additional power sources or tedious operation steps are not needed, and the stability of the device under wind interference or soft soil is remarkably improved.

The application discloses a floating oscillating water column type wave power generation device, which comprises a runner chamber I and a protective cap, a nozzle is arranged in the runner chamber I, a flow guide cone is arranged below the nozzle and has the same central axis with the nozzle, the flow guide cone is conical and has a downward pointed end, an impeller is arranged above the nozzle and has the same central axis with the nozzle, a generator is arranged above the impeller and has the same central axis with the impeller, the protective cap is arranged on the top of the runner chamber I, and gaps for air circulation are arranged at the edges of the runner chamber I and the protective cap. The nozzle with the flow guide cone structure is adopted in the application, the flow guide cone can guide the flowing direction of air flow, accelerate the flowing speed of the air flow in the device, and slow down the wave upwelling phenomenon in the runner chamber, thereby protecting the internal components of the device. The protective cap can effectively protect the generator and the controller in the device from the erosion of rainwater and sea air, thereby prolonging the service life of the device.

The utility model discloses a vacuum valve body sealing performance detector, which effectively facilitates the connection between a helium detector and a vacuum valve body, and comprises the helium detector for detecting the sealing performance and a connecting plate for connecting the vacuum valve body, the connecting plate is detachably connected to the upper side of the helium detector, and the connecting plate is detachably connected to the lower side of the helium detector. A first sealing ring is arranged on the side, away from the helium detector, of the connecting plate, a connecting block is fixedly connected to the upper side of the connecting plate, an expandable expansion belt is fixedly connected to the middle of the connecting block, and a plurality of second sealing rings fixedly arranged on the outer side of the connecting block in a sleeving mode are arranged on the upper side of the expansion belt. The device is simple and convenient to operate, effectively improves the sealing performance detection precision, facilitates the operation of a worker, achieves a better sealing effect, facilitates the cooperation between the device and a vacuum valve body, facilitates the connection between the vacuum valve body and a helium detector, and achieves a better sealing effect.

The utility model belongs to the technical field of power batteries, and discloses a battery pack and an electric device. The battery pack comprises a shell, an immersion assembly, a liquid cooling assembly and at least one battery pack, the shell is provided with at least one accommodating cavity along a first direction for accommodating at least one battery pack, the battery pack comprises a plurality of battery cells which are sequentially arranged along a second direction, every two adjacent battery cells are conductively connected through a busbar, and body parts of the battery cells are hermetically connected to the bottom walls of the accommodating cavities; the immersion assembly comprises an immersion cavity, the immersion cavity is formed in the bottom wall of the accommodating cavity, an immersion medium circulates in the immersion cavity, the body part of the battery cell covers the immersion cavity, and the busbar is inserted in the immersion cavity so as to be in heat exchange connection with the immersion medium; the liquid cooling assembly is arranged in the accommodating cavity, the liquid cooling assembly is used for being in heat exchange connection with at least one side of the battery pack, and heat exchange is performed on the busbar and the battery cell body in an immersion cooling and liquid cooling manner, so that the heat exchange effect is improved, and the weight is not increased greatly.

The utility model discloses a connecting disc harrow piece and the axle head of support leg, including outer flange, mandrel and bearing, outer flange is located the periphery of mandrel, and mandrel is connected with outer flange through bearing;Characterized in that: bearing is double row tapered roller bearing, and the outside of bearing one end is provided with the circlip of limiting it and the dust cover of avoiding silt to enter, and the outside of bearing other end is provided with the bushing of positioning it and the composite sealing ring of sealing effect, and the outside of composite sealing ring is provided with the check ring of limiting it. The utility model discloses an axle head, and bearing adopts double row tapered roller bearing, and its axial load bearing capacity is bigger, and will not appear the situation of shaking or damaging;Meanwhile, bearing's both sides are provided with circlip, dust cover, have composite sealing ring, bushing and check ring, effectively realize the sealing of internal bearing, can effectively avoid the soil and fine sand to enter the inside of axle head, ensure the service life of axle head.

This utility model relates to the field of lithium battery technology and discloses a multi-slider linkage demolding lithium battery casing injection mold, including a worktable, a U-shaped frame mounted on the top of the worktable, an injection molding component mounted on the top of the U-shaped frame, and a switching component mounted on the top of the worktable. This utility model, by setting up a lifting component, moves the left movable box to the left. During this process, the two connecting gears on the left movable box rotate due to the meshing action of the fixed gear plate, thereby causing the intermediate shaft of helical gear B to rotate. This causes helical gear B to rotate, leading to the rotation of the threaded rod. Under the action of the threaded rod, the threaded cylinder moves the lifting plate up and down, thereby causing the vertical rod to move upward with the lifting plate, pushing the injection-molded product upward for easy removal. By switching the two movable boxes, automatic demolding of the product is achieved, improving the overall working efficiency of the device.

The utility model relates to the technical field of feed processing, and discloses a grease storage device for processing pet dog and cat food feed, which comprises a storage tank and a heat preservation tank, a collecting tank is arranged at the bottom of the storage tank, a heat recovery mechanism is arranged on the right side of the outer wall of the storage tank, and a filtering mechanism is arranged at the bottom of the storage tank. A containing mechanism is arranged in the heat preservation tank, a pressure detection mechanism is arranged at the top of the heat preservation tank, a stirring mechanism is arranged in the storage tank, and the left side of the outer wall of the collecting tank communicates with a connecting pipe. The heat recovery mechanism comprises a heat preservation layer which is fixedly connected to the outer wall of the storage tank. According to the device, redundant heat is extracted into the heat preservation tank through the copper pipe, the heat is stored through the ethylene glycol solution, when the heat in the storage tank is insufficient, the switch valve on the top is opened, the heat is sent back to the heat preservation layer again through the fan, and heat utilization is achieved.