35results about How to "Highly precise control" patented technology

A foldable pushing chain type lifting platform belongs to the technical field of pushing chains and lifting platforms and comprises a meshed pushing chain system, an X-axis limiting mechanism and a Y-axis limiting mechanism, one side of the bottom of the meshed pushing chain system is fixedly connected with a base, the meshed pushing chain system outputs pushing chains upwards in the Z-axis direction, and the X-axis limiting mechanism and the Y-axis limiting mechanism are fixedly connected with the base. The top end of the pushing chain is fixedly connected with a top table used for bearing a lifted object, an X-axis limiting mechanism is further connected between the top table and the base, and the side, away from the meshing type pushing chain system, of the X-axis limiting mechanism is connected with a Y-axis limiting mechanism. The X-axis limiting mechanism is of a folding arm structure which only rotates around the X axis and limits the pushing chain and the top table to move in the X-axis direction. According to the invention, the pushing chain is used as a driving part, and the device has the advantages of high speed, large bearing capacity, high precision, long maintenance period, multi-point control, good stability, low initial height, large stroke, small occupied space and strong environmental adaptability.

The invention relates to the field of engineering surveying and mapping equipment, and discloses an engineering surveying and mapping instrument positioning device which comprises a lower mounting seat, three electric cylinders are movably mounted on the outer side of the top end of the lower mounting seat, a placement table is fixedly connected to the top end of an upper mounting seat, and a transmission shaft is movably mounted in the middle of the interior of the placement table; a driving bevel gear is fixedly installed on the outer diameter of the middle of the transmission shaft, lead screws are movably installed on the four inner side walls of the placing table, sliding blocks are in threaded connection with the outer diameters of the lead screws, and sliding grooves are formed in the positions, corresponding to the lead screws, of the upper surface of the placing table; the top ends of the sliding blocks penetrate through the interiors of the sliding grooves in the corresponding sides and are fixedly connected with clamping blocks. Through the unique structural design, convenient opening and closing and height adjustment of the inclined supporting frame are achieved to adapt to the terrain, the device can automatically adapt to clamping of the irregular surveying instrument and is stable and reliable, accurate calibration can be achieved to ensure that the surveying instrument is horizontal, and the efficiency and precision of engineering surveying and mapping are effectively improved.

The cooling mechanism comprises a bottom box, a hollow frame is fixedly connected to the top of the bottom box, supporting rods are fixedly connected to the top ends of vertical symmetry axes on the two sides of the inner wall of the hollow frame, and the whole polishing area can be completely shielded by arranging a top box and a box door structure; the cooling liquid is prevented from flying out of a grinding area with chippings, meanwhile, the safety in the hardware grinding process is improved, a worker can pull and push a gear strip in a shell through a pull rod, when the worker pulls the gear strip out of a through hole groove, a gear disc can drive a threaded column at the bottom of a shaft core to rotate, and the grinding effect is improved. When a worker pushes a gear strip into a shell, a gear disc drives a threaded column at the bottom of a shaft core to rotate in the other direction, the inner shell drives the grinding mechanism to move upwards, and therefore the worker can conveniently and accurately control the height of the grinding mechanism.

The utility model discloses a polishing device for a ceramic scraper, which belongs to the technical field of scraper processing and comprises a mounting table, a Y-axis transmission component, a Z-axis transmission component and an X-axis transmission component, the Y-axis transmission component is assembled on the upper end face of the mounting table, and the Z-axis transmission component is assembled on one side of the Y-axis transmission component; the X-axis transmission assembly is assembled on the upper end face of the mounting table and located at the lower ends of the Y-axis transmission assembly and the Z-axis transmission assembly, two supporting rods are assembled on one side of the upper end face of the mounting table and arranged in parallel, a side mounting block is slidably arranged between the two supporting rods, and a fan is assembled on one side of the side mounting block. A locking knob is arranged on one side of the side mounting block in a penetrating mode, and one end of the locking knob abuts against the adjacent supporting rod. The polishing device for the ceramic scraper has the advantages that multi-axis all-directional control is achieved, machining efficiency is improved, multi-axis all-directional control is achieved, machining requirements of complex curved surfaces of the ceramic scraper can be met more flexibly, and machining comprehensiveness is improved.

The invention provides a manufacturing method of an air slot isolation structure, and belongs to the field of integrated circuit manufacturing. Comprising the following steps: forming an ONO hard masking layer on a semiconductor substrate through thermal oxidation or deposition; photoetching, gluing, exposing and etching the upper surface of the ONO hard masking layer to form an air slot position; performing dry etching on the semiconductor substrate to form a deep groove structure; sacrifice oxidation and sacrifice oxidation rinsing are carried out on the deep groove structure to form a deep groove structure after sacrifice oxidation; performing thermal oxidation on the side wall and the bottom surface of the oxidized deep groove structure to form a thermal oxidation buffer layer of silicon dioxide; depositing a sealing oxide layer, and filling the surface of the deep groove structure; removing silicon dioxide on the uppermost surface of the ONO hard masking layer by using CMP planarization; and rinsing the silicon nitride layer and the silicon dioxide cushion oxygen layer by a wet method to form a complete air slot isolation structure. According to the invention, a complete air slot isolation structure is realized through a simple process, the process cost is reduced, and the production efficiency is improved; simple and reliable process control is realized; and the surface stress risk is reduced.

This utility model discloses an easily adjustable guide vane fixing base for marine air lubrication. The key technical points are: belonging to the field of marine equipment repair and construction, it includes a mounting frame body, with an air release device installed at the upper end of the mounting frame body; a support is movably connected to the lower part of the mounting frame body; and a symmetrically distributed limiting frame is fixedly connected to the upper end of the support. By setting guide blocks and top rods, the guide blocks move to drive the connected top rods, which in turn drive the top frame to adjust its position. This allows for precise control of the guide vane's height during installation, enabling it to quickly align with the designed installation position and improving positioning accuracy. The adjustable height function allows for fine-tuning of the guide vane's posture and position during initial installation or trial assembly, avoiding rework caused by positional deviations before welding or bolt fixing. This improves the convenience of assembling the guide vane body using this marine air lubrication guide vane fixing base.

The invention discloses an electric control box, and the box comprises a box body which is provided with a mounting groove; the control panel is mounted in the mounting groove, and the control panel comprises a main board body and a power device connected to the main board body; the radiator is in heat-conducting connection with the power device; and the insect-proof cover covers one side, back on to the radiator, of the power device, and an insect-proof space for accommodating the power device is defined between the insect-proof cover and the radiator. Through local sealing protection of the power device, comprehensive sealing of the whole electric control box is not needed, infestation of insects to core components is accurately blocked, and protection redundancy caused by integral sealing is avoided. In terms of heat dissipation efficiency, heat transfer loss is reduced through direct heat conduction connection of the radiator and the power device, meanwhile, heat exchange between the radiator and the outside is not affected by the layout of the insect-proof cover, and the heat dissipation effect is guaranteed; on the aspect of structural optimization, the overall sealing structure is simplified through the local protection design, the size of the electric control box is reduced, and the assembly complexity and the production cost are reduced.

The utility model discloses a sewage pool flocculant throwing device, and belongs to the technical field of throwing devices. The sewage pool flocculant throwing device comprises a fixed barrel body, an annular adjusting seat is arranged at the bottom of the fixed barrel body, and the inner wall of the annular adjusting seat is in threaded connection with an annular adjusting frame; through unique structural design, flexible and accurate adjustment of the position of the nozzle group is achieved, the position of the nozzle group can be adjusted in the horizontal direction and the vertical direction by means of threaded connection of the annular adjusting frame and the annular adjusting seat and matching of the first adjusting rod, the second adjusting rod, the corresponding sliding seat and the corresponding limiting piece, and the nozzle group can be adjusted in the vertical direction. The height of the first sliding seat and the height of the second sliding seat can be accurately controlled and the throwing height can be changed by rotating the first limiting part and the second limiting part, so that the device can adjust the throwing position of the flocculating agent according to the actual conditions such as sizes of pool bodies of different sewage pools, sewage distribution and the like, the flocculating agent is promoted to be more uniformly distributed in sewage, the flocculation effect and the sewage treatment capacity are improved, and the device adapts to various complex working conditions.

The present invention relates to the technical field of sample preparation for testing, and discloses a sample preparation device for triaxial testing of granular materials and a method for using the same, that is, on the one hand, when the petals of the molding mold are molded together, by making the bottom of the molding mold sleeve on the top periphery of the mold base and pressing the bottom of the sample wrapping film, the structural stability of the mold during sample preparation can be improved; on the other hand, before sample preparation, the internal ventilation structure of the mold petals can be used to form a negative pressure so that the middle part of the sample wrapping film is stretched and tightly attached to the inner wall surface of the molding mold, which is convenient for laying the sample wrapping film, thereby facilitating the sample preparation efficiency and qualified rate of non-sticky cylindrical samples. In addition, since the triaxial compression test can be conveniently performed on the molded non-sticky cylindrical sample when the petals are opened, compared with the existing vacuum sample preparation method and the freezing sample preparation method, time and steps can be saved, and the efficiency of sample preparation and testing can be greatly improved.

The utility model relates to cold storage technical field provides a row pipe subassembly for cold storage, including row pipe support, the rear side fixed mounting of row pipe support has the slide, still includes: a plurality of adjusting assembly, all settings in the inside of row pipe support, the adjusting assembly includes the slide seat, the slide seat sets up in the inside of row pipe support, wherein, the slide seat can do the slip movement in the inside of row pipe support, support plate, fixed mounting at the top of slide seat, the top left side fixed mounting of support plate has the first clamping plate, the utility model discloses, when using, through the setting of slide seat and second clamping plate structure, not only makes the personnel to place and fix the row pipe on the row pipe support conveniently, need not carry out welding or complicated fixed operation, makes the installation and disassembly process more fast, especially when maintaining or replacing the row pipe, can quickly loosen second clamping plate, has reduced maintenance cost and time.

The invention discloses an electric adjusting seat with a single-spring damping structure, which comprises a seat upper assembly, the seat upper assembly is fixed on a seat framework, a damping shell is fixed on the lower side of the seat framework, a damping mechanism is arranged in the damping shell, and the damping shell can move along the outer wall direction of the damping mechanism. An electric control system used for driving the damping mechanism is arranged in the seat framework and the damping shell, and the damping mechanism is fixed to the base. When the electric control system drives the damping mechanism to work, the damping shell, the upper assembly and the seat framework can move downwards; the damping mechanism comprises a damping inner shell, a damping lower machine cover is fixed to the lower side of the damping inner shell and fixed to the middle of the base, a damping upper machine cover is fixed to the upper side of the damping inner shell, a damping spring is arranged between the damping lower machine cover and the damping upper machine cover, and a spring shaft sleeve is arranged at the upper end of the damping spring. The output end of the electric control system penetrates through the damping upper machine cover and then is screwed with the spring shaft sleeve, and the electric control system is used for driving the spring shaft sleeve to move up and down.

The utility model discloses a drug coating intravascular stent, which belongs to the technical field of intravascular stents and comprises a support column, a sleeve is slidably connected to the outer surface of the support column, four support plates are arranged on the outer side of the sleeve, and the outer surfaces of the four support plates are jointly and fixedly connected with a support sleeve. The side face, close to the sleeve, of each supporting plate is fixedly connected with two second fixing blocks, driving rods are movably hinged to the inner walls of the four second fixing blocks, and four driven rods are movably hinged to the inner walls of the other four second fixing blocks. According to the drug coating intravascular stent, by arranging the first fixing block, the second fixing block, the sleeve, the driving rod, the driven rod and the supporting plate, the first fixing block and the driving rod can be driven to move when the sleeve moves under the action of the sleeve, and the supporting rod and the driven rod are driven to ascend under the action of movement of the driving rod; therefore, the supporting sleeve and the coating can be supported, and the movement distance of the sleeve is controlled.

The application provides a thin film deposition device in the technical field of thin film deposition, which comprises a workbench, a vacuum tank, a vacuum cover, a quartz tube, an outer cover cylinder, a coil assembly, a gas supply mechanism, a gas extraction mechanism, a sample stage mechanism, a knocking mechanism and a lifting mechanism. Working gas can be ionized in an inductive coupling area to form a plasma, so that various active species are generated from the working gas, and reactions occur between the active species or between the active species and monomers, so as to facilitate the deposition of a polymer film on the surface of sample microspheres in the subsequent process, and the film plating effect of the product is improved. The knocking mechanism is installed on the workbench, passes through the vacuum tank and is attached to the sample stage mechanism, so that the knocking mechanism knocks the sample stage mechanism, thereby causing the multiple sample microspheres placed in the sample stage mechanism to vibrate, avoiding the adhesion of the multiple sample microspheres and improving the film plating effect of the sample microspheres.

The invention discloses a secondary electron emission performance parameter testing device and a testing method. The device comprises a spherical electron collector, which is composed of a spherical collecting electrode, a spherical suppressing electrode and a spherical grounding electrode from the outside to the inside; the spherical electron collector is fixed on an electron collector fixing device in a vacuum chamber, an incident electron hole is arranged above the spherical electron collector, and an electron gun muzzle enters the interior of the spherical electron collector through the incident electron hole, and a sample stage inlet and outlet hole is arranged below the spherical electron collector; a sample stage lifting and rotating device comprises a magnetic fluid controller installed outside the vacuum chamber, a screw transmission mechanism in the vacuum chamber and a gear rotating mechanism connected thereto, the sample stage is connected to the gear rotating mechanism, and the sample stage enters the interior of the spherical electron collector from the opening below the spherical electron collector; the magnetic fluid controller drives the sample stage to move up and down and rotate through the screw transmission mechanism and the gear rotating mechanism connected thereto; one side of the sample stage is used to place the sample to be tested, and the other side fixes the primary electron collector.

This invention provides a non-disassembly-required confocal magnetron sputtering target base distance adjustment device. The device includes a bearing housing, a bearing, a nut, a lead screw, a bellows, and a target tube limiting sleeve. The bearing housing is mounted on the cavity wall, the bearing is installed inside the bearing housing, the nut is fixed inside the bearing, the lead screw has a hollow structure, its upper end extends into the nut and is threadedly connected to the nut, and its lower end is fixed to the target tube. The bellows is sleeved on the target tube outside the cavity, its upper end is fixedly connected to the cavity wall, and its lower end is fixed to the target tube; the bellows is located inside the nut and the lead screw. The target tube limiting sleeve is fixed to the cavity wall inside the cavity and is sleeved on the upper end of the target tube to restrict the rotational movement of the target tube. Manually rotating the nut drives the lead screw, which in turn drives the target tube to complete the target base distance adjustment. This invention eliminates the need for manual disassembly of the target tube, enabling convenient and precise lifting and lowering of the target tube in a vacuum environment; the overall structure is simple and saves space.

The utility model relates to the field of pipe fitting prefabrication, and particularly discloses a pipe fitting storage vertical warehouse which comprises a storage frame provided with a plurality of storage layers in the vertical direction and a lifting conveying device arranged on one side of the storage frame. The lifting conveying device comprises two first stand columns oppositely arranged in the first direction, two lifting bases movably arranged on the two first stand columns in the vertical direction, two lifting driving assemblies used for driving the two lifting bases to move correspondingly, and a lifting table connected with the two lifting bases. The vertical pipe storage warehouse further comprises two detection assemblies used for detecting the positions of the two lifting bases in the vertical direction and a control unit electrically connected with the two lifting driving assemblies and the two detection assemblies. The control unit can control at least one lifting driving assembly according to the position information, detected by the two detection assemblies, of the two lifting bases, so that the lifting table is kept horizontal.

The utility model discloses a copper bar bending die, and relates to the technical field of copper bar bending. The die comprises a bottom plate, a forming seat is fixedly connected to the top of the bottom plate, lower die seats are fixedly connected to the two sides of the top of the bottom plate, and an upper die seat is slidably connected to the bottom of the forming seat; an adjusting assembly is arranged in an inner cavity of the forming base. By arranging the adjusting assembly and the synchronizing assembly, the problem that the depth of the upper die and the depth of the lower die of a traditional copper bar bending die cannot be synchronously adjusted is effectively solved, a lead screw in the adjusting assembly is matched with a threaded sleeve, the height of the base can be accurately controlled, and meanwhile the synchronizing assembly is adjusted through linkage of a driving bevel gear, a driven bevel gear and a guide angle. The synchronous movement of the upper die base and the pressing base is ensured, the tedious operation of manual repeated adjustment is avoided, the adjustment precision is remarkably improved, the machining quality problem caused by errors is reduced, the production efficiency is greatly improved, and the working intensity of operators is reduced.

The utility model relates to the technical field of business suit customization, in particular to size measuring equipment for business suit customization, which comprises a base, the top of the base is provided with an adjusting assembly, the adjusting assembly comprises a supporting column, the supporting column is fixedly connected to the top of the base, and the top of the supporting column is fixedly connected with an adjusting cylinder. The top of the adjusting cylinder is fixedly connected with a servo motor, and the transmission end of the servo motor is fixedly connected with a connecting shaft. According to the invention, the adjusting assembly is arranged, the servo motor is started to drive the connecting shaft and the adjusting turntable, so that the measuring frame can rotate by 360 degrees, a user does not need to turn around and change postures continuously, the experience of the user in the measuring process is improved, the influence of a factor that the posture change of the user is not standard on measured data is avoided, and the measuring accuracy is improved. The measurement frame moves to different measurement positions around the user, so that measurement data deviation caused by user factors can be effectively reduced, and the accuracy of a measurement result is further improved.

The utility model discloses an integrated seat with a forward sitting structure, which comprises a seat base, a plurality of supporting wheels for supporting the seat base are mounted on the side surface of the seat base, a stand column is mounted on the side surface of the seat base, a mounting square tube with adjustable height is arranged on the side surface of the stand column, and the mounting square tube is connected with the stand column. An adjusting assembly for controlling the mounting square pipe to move is arranged on the side face of the stand column, a seat assembly and an armrest assembly are arranged on the side face of the mounting square pipe, the height position of the seat assembly and the height position of the armrest assembly are adjustable, and foot lifting assisting structures are arranged on the two sides of the seat base. According to the integrated seat with the forward sitting structure, the foot lifting assisting structure used for exercising the legs of a patient is arranged, the patient can conveniently train the legs, the rehabilitation efficiency of the patient is improved, meanwhile, the height of the seat assembly and the height of the armrest assembly arranged in the seat are adjustable, and the integrated seat is suitable for being used by people in different postures.

The utility model discloses a rotary assembly for assembling a valve body pressure gauge. The rotary assembly is composed of a supporting frame, a lifting mechanism and a rotary assembly mechanism. The lifting mechanism comprises a driving motor, a lead screw transmission pair, a linear guide rail pair and the like, the height can be accurately adjusted, the rotary mounting mechanism is driven to be close to or away from the valve body, and it is ensured that operation is conducted at the proper height. The rotary mounting mechanism is provided with an up-down adjusting assembly, a screw-in assembly and a clamping assembly. The up-down adjusting assembly can accurately and finely adjust the height through an air cylinder, a sliding rail, a pushing and pressing wheel and the like. The screw-in assembly stably rotates through the driving motor, the connecting rotating shaft and the mounted bearing; the clamping assembly can stably clamp the pressure gauge by means of a clamping claw, an H-shaped connecting block, a tension spring and an auxiliary wheel. All the assemblies work cooperatively, automatic and high-precision valve body pressure gauge assembling is achieved, the assembling efficiency and quality are greatly improved, and the industrial production requirement is met.

This invention relates to the field of road construction equipment technology, and discloses a concrete curing and covering device for road construction. The device includes an L-shaped mounting frame with an adjustable membrane cylinder positioning shaft and an adjustable mounting bracket mounted on its upper part. The adjustable membrane cylinder positioning shaft is rotatably mounted between the adjustable mounting bracket and the upper part of the mounting frame. An adjustable water pipe and a pressing roller are mounted on one side of the lower part of the mounting frame. The ends of the water pipe and the pressing roller are mounted on a mounting plate. An adjustment component that drives the mounting plate to move up and down is mounted on the lower side wall of the mounting frame. Multiple spray heads are equidistantly mounted on the lower side of the water pipe, and their ends are connected to water delivery hoses. The pressing rollers are covered with protective soft sleeves. With this structure, the invention has the following advantages: the adjustable membrane cylinder positioning shaft and the adjustable mounting frame provide strong adaptability and convenient adjustment; it integrates wetting and covering functions; and the covering adheres tightly and provides high quality.

The utility model discloses a belt conveyor carrier roller adjusting device, which relates to the technical field of carrier roller adjustment, and comprises two symmetrically arranged fixed plates, two fixed slideways are symmetrically arranged in the middle parts of the opposite surfaces of the two fixed plates, positioning bolts are arranged in the two fixed slideways in a sliding manner, and a carrier roller frame is screwed on the positioning bolts. Two positioning nuts are arranged on the two sides, located on the carrier roller frame, of the positioning bolt in a threaded connection mode, a carrier roller is arranged on the top face of the carrier roller frame in a bearing mode, two first sliding ways are formed in the positions, located on the two sides of the screw sliding groove, of the two fixing plates, clamping plates are arranged in the first sliding ways in a sliding mode, a sliding table is fixedly connected between the opposite faces of the clamping plates, and lifting assemblies are arranged on the two sides of the bottom face of the sliding table. And bearing tables are fixedly connected to the opposite surfaces of the bottom ends of the two fixing plates, so that the problems that abrasion of a belt and a carrier roller is aggravated and equipment faults occur frequently due to the fact that the position and the height of the carrier roller of an existing carrier roller frame fixing structure are difficult to adjust are finally solved, the running stability and reliability of a belt conveyor are improved, and the service life of the equipment is prolonged.

The utility model discloses a bright decorative strip assembling, positioning and pressing mechanism which comprises a pressing mechanism, a fixing mechanism and a clamping mechanism, the fixing mechanism is arranged in the pressing mechanism, the clamping mechanism comprises a gear motor, the output end of the gear motor is fixedly connected with a cam disc, the top of the cam disc is movably connected with a first transmission plate, and the first transmission plate is fixedly connected with a second transmission plate. The two sides of the first transmission plate are movably connected with first vertical plates. Through the arrangement of the clamping mechanism, the first clamping plate and the second clamping plate can be pushed to move towards the inner side, a workpiece is rapidly fixed through the first clamping plate and the second clamping plate, threaded transmission can be conducted on the fixing mechanism through the downward pressing mechanism, the threaded transmission speed is low, and a user can conveniently and accurately control the height of the fixing mechanism; when a user positions a workpiece, the situation that the transmission speed of the screw is low is avoided, the bright decoration strip can be rapidly fixed, the user can use the bright decoration strip conveniently, and therefore normal use of the user is guaranteed.

The utility model relates to the technical field of ceramic glazing, in particular to ground glaze applying equipment for exquisite ceramic bowls, which comprises a base and further comprises a storage barrel, a stirring mechanism, two support columns, an adjusting ring, a limit bolt, a connecting plate and a clamping mechanism, the storage barrel is arranged on the base, the stirring mechanism is positioned on the base and extends into the storage barrel, the number of the support columns is two, and the adjusting ring is arranged on the base. The supporting columns are symmetrically arranged on the front side and the rear side of the base, a scale sticker is arranged outside each supporting column, an adjusting ring is slidably arranged outside each supporting column and located outside the scale sticker on the same side, a limiting bolt is detachably arranged at each adjusting ring and abuts against the supporting column on the same side, and the connecting plate is arranged between the two adjusting rings. The clamping mechanism is located below the connecting plate, and the exquisite ceramic bowl green bodies are limited and fixed in the storage barrel through the limiting bolts, so that the height of the glazed surfaces of the glazed exquisite ceramic bowl green bodies is accurately controlled, and the glazing quality of the exquisite ceramic bowl green bodies is guaranteed.

The utility model discloses a kind of building material stacking devices for bridge and tunnel engineering construction, belong to building material stacking technical field, its technical scheme main points include storage bottom plate, into mechanism and storage mechanism, the into mechanism is fixedly connected in the front side of storage bottom plate, the storage mechanism bolt connection is in the outside of storage bottom plate, the into mechanism includes fixed support leg, rotating shaft, rotating plate, lifting block, rotating block, jack and sliding wheel, by setting storage bottom plate and into mechanism, storage bottom plate can store and place building material, fixed support leg provides stable basis for into mechanism, guarantee the static stability when bearing building material, fixed support leg is rotatably connected with rotating plate by rotating shaft and realizes multi-angle flexible adjustment, can be adapted to different operation surface and direction requirement, the collaborative operation of lifting block, rotating block and jack, can be automatically adjusted in lifting process, can satisfy the demand when different height building material storage.

This invention provides a geothermal heat exchanger, relating to the field of geothermal source applications. The geothermal heat exchanger includes a heat exchange tube bent into a "U" shape for heat exchange. The heat exchange tube is divided into an inlet pipe and an outlet pipe. A cutoff unit is installed between the inlet and outlet pipes to interrupt the circulation of the lower heat exchange tube. The cutoff unit connects the inlet and outlet pipes, and multiple cutoff units are evenly spaced between the inlet and outlet pipes. When a leak occurs in the heat exchange tube, this geothermal heat exchanger temporarily connects each cutoff unit sequentially, preventing the heat exchange tube below from entering the circulation, thus allowing the leak point to be located. After locating the leak, the cutoff unit closest to the leak point is permanently connected, solving the problems of difficulty in locating leaks and the difficulty in repairing damaged geothermal heat exchangers in the prior art.

A welding-free fixing device for a water stop steel plate comprises guide wall formworks, a supporting frame, the water stop steel plate and a clamping rod, the water stop steel plate is clamped on the outer sides of the two guide wall formworks through the supporting frame, the two ends of a connecting rod of the guide wall formworks are located in clamping grooves of the supporting frame, and the water stop steel plate is located between the two guide wall formworks. The multiple clamping rods penetrate through the two sides of the supporting frame and are in threaded fit with the supporting frame, the lower side face of the water stop steel plate makes contact with and supports a positioning rod of a guide wall formwork, the locking blocks at the two ends of the rotary connecting rod fix the supporting frame, the rotary clamping rods clamp the water stop steel plate, and the water stop steel plate is locked through the outer hexagon nuts. The water stop steel plate does not need to be welded, and the water stop effect is good.

The utility model relates to an auxiliary tool for automobile seat backrest assembly belongs to automobile seat backrest assembly technical field, including the chassis, the top of chassis is equipped with the auxiliary assembly for assisting backrest assembly, the auxiliary assembly includes fixedly connected with the two electric slide rails of the top of chassis, the electric slide rail's mover fixedly connected with the installation shell, the inner bottom wall fixedly connected with electric push rod of installation shell, the movable rod fixedly connected with fixed frame of electric push rod, the opposite side of two fixed frame all is fixedly connected with motor. The auxiliary tool for automobile seat backrest assembly, through setting up two symmetrical electric slide rails of arrangement, can accurate adjustment fixed frame's position in horizontal direction, and electric push rod can accurately control fixed frame's height in vertical direction, thereby ensuring that the clamping block can accurately reach the position matched with the automobile seat backrest, realizes the high accuracy positioning to backrest.

The utility model discloses a kind of furniture plate special-shaped grooving machine, it includes: pedestal, the top of the pedestal is equipped with grooving component, one side of the pedestal is equipped with connecting box, the inside of the connecting box is provided with lifting mechanism, the top of the lifting mechanism is provided with placing plate;Auxiliary mechanism, the auxiliary mechanism is set in the middle of pedestal to be used for grooving.The utility model is adjusted more flexibly by setting lifting mechanism to the depth of grooving, can be adjusted quickly according to different processing needs, and the height of lifting mechanism can be accurately controlled, ensure the accuracy of the depth of grooving, improve processing quality, satisfy the individualized needs of customer.