161results about How to "Play the role of drainage" patented technology

The invention discloses an intelligent management power distribution cabinet. The intelligent management power distribution cabinet comprises a cabinet body, wherein the inner wall of the lower part of the cabinet body is horizontally and fixedly connected with a mounting plate; fixing rods are vertically arranged in the middle parts of the two sides of the upper surface of the mounting plate; a plurality of wiring panels are uniformly arranged on the fixing rods, and are rotationally connected with the fixing rods; a plurality of wiring holes are uniformly formed in each wiring panel; a separating net is arranged under the mounting plate, and a plurality of air ventilating holes are formed in the separating net. The intelligent management power distribution cabinet has the advantages that by rotating fan blades, the air is sucked via an air inlet strip and a filtering net, so that the effect of heat radiating is improved, and the defect of difficulty in cleaning of dust in the cabinet body is overcome; the height of a universal wheel is controlled by a hydraulic cylinder, so that the cabinet body can be conveniently moved; after each universal wheel extends into the cabinet body, water permeating holes can reach the function of water draining, the wiring between the wiring holes is convenient, and the remote monitoring is convenient; a replaceable grid is adjusted according to the external conditions, the heat radiating and waterproof structure of the cabinet body is changed, and the suitability is improved.

The invention discloses a moisture-proof communication cabinet. Box body, heat dissipation openings are formed in the two sides of the box body; a heat conduction metal block penetrates through the inner wall of the box body and is positioned above the heat dissipation opening; an external heat conduction sheet a is arranged at the end, located on the outer side of the box body and located above the heat dissipation opening, of the heat conduction metal block, an internal heat conduction sheet b is arranged at the end, located on the inner side of the box body and located on the heat dissipation opening, of the heat conduction metal block, and the external heat conduction sheet a and the internal heat conduction sheet b are coated with heat conduction layers; cold air flow entering the boxbody from the outside impacts the outer surface of the internal heat conduction sheet b and is liquefied to fall into the drainage groove to flow out of the box body, and the problem that the interior of the box body is wet due to the fact that the cold air flow is liquefied when the external cold air flow is directly blown into the box body can be effectively solved.

The invention relates to a straw drainage piece. The straw drainage piece is characterized in that a straw section (2) is placed in a non-woven fabric bag (1), strapping tapes (3) are disposed at two ends of the non-woven fabric bag and tightly tie the non-woven fabric bag (1), and the length of the straw section (2) ranges from 30mm to 50mm. A method for manufacturing the straw drainage piece include a, cutting cotton straws to form the straw section (2) with the length ranging from 30mm to 50mm; b, soaking the straw section in preservative liquid for 3 to 10 days, then fishing out the straw section and solidifying and drying the straw section; and c, loading the straw section (2) into the non-woven fabric bag (1), and compacting the non-woven fabric bag (1) loaded with the straw section (2). The straw drainage piece is cheap in price, rich in material and simple in implementation, is free of environmental pollution, and cannot cause blockage easily.

The invention provides a bathtub with a microbubble water function. The bathtub comprises a bathtub body and a supporting installation part arranged on the periphery of the bathtub body. The bathtub is characterized in that a microbubble generator is arranged in a clamped cavity between one end of the bathtub body and one end of the supporting installation part, the microbubble generator comprises a household motor and a water cutting chamber connected with the household motor, an exhausting impeller integrally connected with the output shaft of the household motor is arranged in the water cutting chamber, the water cutting chamber is provided with a water inlet pipeline and a water outlet pipeline which are communicated with the water cutting chamber, one side of the water inlet pipeline is connected with an air inlet pipeline communicated with the outside, and the water outlet pipeline extends out of the clamped cavity and connected with an external shower head. The bathtub can mix air and water flow effectively and uniformly and generate a large quantity of microbubbles.

The invention discloses a structural waterproof parallel air flue type natural ventilator. The natural ventilator comprises a support framework, at least two groups of ventilation components arranged in the support framework parallelly, and an outer protective plate wrapped on the outer side of the support framework. Each group of ventilation components comprises at least two flashing boards in up-down staggered arrangement and a drainage channel connected with the lower edge of the bottom flashing board, a plurality of convex ribs in transversal arrangement and used for slowing down flowing of rainwater and guiding flow and drainage are arranged on each flashing board, and an adjustable opening and closing device is arranged on the drainage channel in each group of the ventilation components, is fastened at the edge of the bottom flashing board of the adjacent group of ventilation components, is capable of blocking and conducting indoor and outdoor air flues, and is used for waterproofing when closed. By means of simple and ingenuous improvement, rainwater can be defended, drained, collected and removed effectively, and the natural ventilator has good application effect and broad application prospect.

The invention discloses an anchor foundation pit drainage system and a construction method thereof. The anchor foundation pit drainage system adopts a multistage drainage system structure, and comprises a pit top drainage structure, a slope drainage structure and a pit bottom drainage structure; the pit top drainage structure comprises a intercepting ditch and a water retaining wall; the slope drainage structure is arranged on a peripheral slope of a foundation pit, and comprises a drainage pitch and a water pipe; the pit bottom drainage structure is positioned at the bottom of the foundationpit, and comprises a water gathering ditch and a water collecting well; different drainage structures are arranged in each layer of structures according to specific structures; all the drainage structures are combined to form one complete drainage system; and the whole system is simple in structure. The invention further discloses a construction method of the anchor foundation pit drainage system;each grade of the drainage system is constructed one by one through a construction mode from top to bottom; construction is simple, stable and reliable; drainage is smooth; and the effects of damp prevention and drainage are achieved.

The invention discloses an underground garage water drainage system which comprises a garage slope, wherein a water guide groove is formed in the upper surface of the garage slope; a garage bottom plate is connected with the lower end of the garage slope. As the water guide groove is formed in the upper surface of the garage slope, rainwater can be conveniently guided into a water inlet groove through the water guide groove; a fixing plate is fixedly mounted at the inner upper end of the water inlet groove, so that a cover plate can be conveniently inserted into a holding cavity through a fixing column; in addition, a first magnet and a second magnet are absorbed by each other, so that the cover plate can be limited and fixed and can be convenient and rapid to mount and dismount; a filtering net is arranged in the cover plate, so that functions of filtration and water drainage can be achieved; a guide rod is fixedly mounted on the fixing plate, and the guide rod is sleeved by a springsleeve and a water baffle plate, so that the water baffle plate can be conveniently moved on the guide rod in a telescopic manner, a telescopic reciprocation function for the water baffle plate can beachieved through the spring sleeve, foreign matters on the upper surface of the filtering net can be cleaned through a cleaning brush below the water baffle plate, and the water drainage effect of the filtering net can be thus improved.

The invention discloses a fast exchanging imbedding device with a smaller wave pipe. The fast exchanging imbedding device with the smaller wave pipe comprises an outer pipe, one end of the outer pipe is provided with a sharp pipe, and the other end of the outer pipe is provided with a front handle. The wave pipe is embedded into the outer pipe. The position, corresponding to the wave pipe, of the outer pipe is provided with a guiding groove, a channel for a zebra wire to penetrate through is formed from the guiding groove to the center of the sharp pipe, and the channel is internally provided with an inner pipe with the diameter larger than that of the zebra wire. The inner pipe is thinner, the external diameter of the inner pipe can be reduced to 1.1 mm from the original 1.3 mm, the external diameter of a liner channel fast exchanging imbedding device can be reduced to smaller 7F from the original 8F, and a fast exchanging liner channel support on the market at present only can be reduced to 8F. Due to the fact that the inner pipe is the stainless steel wave pipe, the tail end infusion function is achieved.

The invention provides a washing machine and a water storage tank thereof. The water storage tank comprises a water storage box, wherein a plurality of flow dividing water channels which communicate with a water inlet tube are formed in the water storage box; a water inlet section of at least one flow dividing water channel communicates with a flow drainage water channel; and a flow baffle which stops water flow is arranged between the flow dividing water channel and the flow drainage water channel. The water inlet section of at least one flow dividing water channel of the water storage tank of the washing machine communicates with the flow drainage water channel, part of water flow which enters the flow dividing water channel flows out through the flow drainage water channel, water flow in the flow dividing water channel is reduced, water choking of the flow dividing water channel when the water pressure is large is avoided, water of the flow dividing water channel flows smoothly, and excessive overflowing water flow is avoided; and the flow baffle is arranged between the flow dividing water channel and the flow drainage water channel, the water flow which enters the flow drainage water channel can be controlled, the flow drainage effect of the flow drainage water channel is achieved, and sufficient water flow can flow through the flow dividing water channels.

The invention discloses an L-shaped concrete retaining wall comprising a body part and a tenon-and-mortise part. The body part comprises a base plate, a main rib plate, a vertical plate and two side rib plates. The vertical plate, the main rib plate and the side rib plates are arranged on the base plate. The main rib plate is located in the middle of the upper surface of the base plate. The two rib plates are located on the left side and the right side of the main rib plate. The outer side face of each side rib plate coincides with the left side face and the right side face of the base plate.The vertical plate is provided with four water seepage holes. Each side rib plate is provided with a water seepage hole. The tenon-and-mortise part comprises a first tenon, a first mortise, a second tenon and a second mortise. The L-shaped concrete retaining wall achieves modularized prefabrication, concrete and a steel reinforcement framework are formed in a mold in an integrated manner, and connection between the steel reinforcement framework and the concrete is more stable through arranged reinforcing steel bar headings. The water seepage holes are arranged on the vertical plate and the side rib plates and achieve the water seepage function. Due to the tenon-and-mortise design, after construction, multiple concrete retaining walls can be more easily matched, and the stability is higher.

The invention discloses a rainwater collection system and a collection method thereof. The rainwater collection system comprises a drainage ditch formed in one side of a road surface, multiple rainwater perforated strainers are embedded in the drainage ditch and arranged in the length direction of the drainage ditch, a curbstone is arranged between the drainage ditch and the road surface, a grooveis formed in the bottom of the curbstone, a filtration board is arranged in the groove, a water collection tank is arranged below the drainage ditch, a rainwater collection tank is arranged on one side of the water collection tank, an adsorption box is arranged on one side of the rainwater collection tank, multiple adsorption boards are arranged in the adsorption box, a recycling box is arrangedon one side of the adsorption box, the side wall of the drainage ditch is connected with an overflow pipe, and one end of the overflow pipe is connected with a temporary water storage tank. The rainwater collection system has the effects that the rainwater collection rate is increased, losses are reduced, and the collected rainwater can be filtered.

The invention discloses a paving structure and a paving method for quickly recovering functions of a pavement and a bridge floor. The paving structure comprises a double-layer fiber-added macadam seal layer and an ultrathin antiskid wearing layer from the bottom up, wherein the double-layer fiber-added macadam seal layer comprises a lower binder layer, a chopped fiber layer and an upper binder layer from the bottom up. According to the paving structure and the paving method for quickly recovering the functions of the pavement and the bridge floor, compared with the prior art, on the basis that the original paving is made full use of, gap graded aggregate is adopted to achieve water proofing of the pavement, prevent water from damaging the pavement, and exert the functions of water shutoff and drainage simultaneously; and the paving structure is high in construction efficiency, and can reduce the interference of the traditional construction manner to traffic.

The invention discloses an integral construction method for a constructional column and a main body structure. The integral construction method comprises the steps that (1) constructional-column overlapping steel bars are pre-buried in a preset position for casting the constructional column; (2) the lower end of a constructional-column steel reinforcement cage is bound together with the pre-buried overlapping steel bars, and the upper end of the constructional-column steel reinforcement cage is bound together with a main-body-structure steel reinforcement cage; (3) a constructional-column casting formwork of the constructional column is constructed, a main-body-structure formwork casting formwork of the main body structure is constructed, a constructional-column casting through-hole is formed in the bottom of a main-body-structure formwork, and formworks on the two sides of the constructional column are U-shaped-structure formworks; and (4) the constructional column is cast firstly, then the main body structure is cast, in the casting construction of the constructional column, an air exhaust pipeline is inserted into the constructional-column casting through-hole, and a separant is spread on the outer side of the air exhaust pipeline in a brushing mode. According to the integral construction method for the constructional column and the main body structure, a construction technology that the constructional column is cast firstly, then the main body structure is cast, and finally brickwork is constructed is adopted, and through the construction technology, the casting period of the constructional column can be effectively shortened, and the construction difficulty is reduced.

The invention relates to a lower air duct plate used in an electric air door, which comprises a lower body, wherein a lower storage chamber is disposed on the upper end face of the lower body, and a lower air outlet is disposed in the side wall of the lower storage chamber; a drainage groove is disposed in the bottom face of the lower storage chamber, and a drainage through hole is also disposed in the bottom face of the lower storage chamber; and one end of the drainage groove is disposed near to the lower air outlet, and the other end of the drainage groove is connected to the drainage through hole. The invention also relates to an air duct assembly containing the lower air duct plate. The invention also relates to a refrigerator containing the air duct assembly. The lower air duct plate provided by the invention has the beneficial effect that the lower air duct plate has a simple structure and is processed conveniently, wherein the drainage groove can effectively discharge condensation dews in the lower storage chamber, and the technical problem that easy freezing of the air door and the assembly will make refrigeration of the whole refrigerator out of control is solved.

The invention provides an unloading device of a mortar mixer, belongs to the technical field of machines and aims to solve the problem that the mixed mortar cannot be automatically unloaded from the mixer in the prior art. The unloading device in the mortar mixer is characterized in that the mortar mixer comprises a rack and a mortar stirring cylinder, wherein the rack comprises a working plate and a support leg; the mortar stirring cylinder comprises a loading cylinder and an inner roller; a discharging hole is formed in the side wall of the loading cylinder; an unloading device is arranged in the discharging hole and comprises a rotation motor, a gear and a rack; the rotation motor is fixed on the working plate; the gear is fixed on the rotation motor; the rack and the gear are meshed with each other; the width of the rack is larger than that of the gear; the rack is arc-shaped and is concentric to the loading cylinder; a leakage nozzle for outflow of the mortar is formed in the discharging hole of the loading cylinder. The unloading device of the mortar mixer has the advantage that the mixed mortar can be automatically unloaded from the mixer.

The invention discloses a technique method of building a refractory lining dual-chute of a dry quenching furnace, and belongs to the building construction field of metallurgical equipment. The technique method is mainly used for solving the problems that the construction difficulty of the refractory lining dual-chute of the dry quenching furnace is big, and the dimension accuracy is hard to control. The technique method includes the first step, selecting proper refractory bricks and pre-practicing mating objects according to equipment requirement; the second step, manufacturing standard fixtures with corresponding dimensions; the third step, confirming position of every supporting wall by a tool; the fourth step, timely detecting bias of corresponding dimension and making adjustment during the building process according to corresponding reference line. Specific to bracket brick expansion or rupture of a single-chute bracket supporting wall in the prior art, the technique method reduces the safety problem of the dry quenching production; the method applies a technique of 'pre-practicing for many times and selecting bricks to form a complete set' and a control method of 'measuring every brick while adjusting every layer', so that the supporting wall stability of a chute zone is improved, and the service life of the dry quenching furnace is prolonged.

The invention discloses an EPS decorative molding. The EPS decorative molding is fixedly connected with a wall through anchoring parts and is bonded with the wall through a polymer mortar bonding layer, an alkali-resisting fiberglass mesh fabric layer is bonded on the surface of the outer side of the EPS decorative molding through an anti-crack mortar layer and is coated with a coating layer, and grooved patterns are arranged on the side, bonded with the wall, of the EPS decorative molding. A distribution groove is formed in the side, facing the ground, of the outer side of the EPS decorative molding. The EPS decorative molding adopts the alkali-resisting fiberglass mesh fabric layer, has the advantages of being good in alkali-resisting performance, high in tensile strength and the like and has very high corrosion resistance in cement and other strong alkali media. In addition, the grooved patterns are arranged on the side, bonded with the wall, of the EPS decorative molding, so that the EPS decorative molding and the wall are bonded more firmly, the water drainage effect is played, and pressure to the EPS decorative molding of rainwater is reduced. The distribution groove is formed in the outer side of the EPS decorative molding, has a distribution role on rainwater and reduces the pressure to the EPS decorative molding of rainwater.

The invention relates to a pickling tank. The pickling tank is characterized by comprising a groove body and a hook. The groove body is provided with a notch. An opening of the notch is upward. A groove cover is arranged on the hook. The side walls of the groove body are provided with exhaust openings. The groove cover is detachably connected to the hook through a fastening component. The outer walls of the groove body are provided with acid mist recycle chambers. The acid mist recycle chambers are connected with the exhaust openings through pipelines. According to the pickling tank, due to the fact that the groove cover is installed on the hook, after a bar is lifted to the groove body through the hook by a worker, the hook does not need to be moved away, the groove cover arranged on the hook can have a protective effect, and the potential safety hazard can be reduced. Meanwhile, the groove cover also has a drainage effect, and acid mist is guided to the portion nearby the side wall of the groove body, so that the acid mist can be fully sucked away by the exhaust openings. The condition that due to the fact that a workshop is polluted by the acid mist, the physical health of the worker is harmed is avoided.

The invention discloses a cabinet air conditioner, an air conditioner and an air outlet control method of the cabinet air conditioner. The cabinet air conditioner comprises a shell and an air outlet apparatus, wherein an air duct is formed in the shell, and a fan and a heat exchanger are installed in the air duct; and the air outlet apparatus comprises three air outlet structures communicated with the air duct, a wind tunnel is formed between two adjacent air outlet structures, the wind tunnel penetrates through the shell, each air outlet structure comprises an air outlet frame, the air outlet frame is provided with an air guide mechanism, the air guide mechanism comprises a plurality of transverse air guide plates, the transverse air guide plate comprises a first air guide part and a second air guide part, the transverse air guide plate is provided with a horizontal air guide position, when the transverse air guide plates are disposed at the horizontal air guide position, the first air guide part is horizontally arranged, the second air guide part is disposed below the first air guide part, an angle Alpha between the first air guide part and the second air guide part is greater than or equal to 90 degrees and less than 180 degrees, and the lengths of the plurality of second air guide parts are gradually increased from bottom to top. According to the technical scheme, the temperature of the indoor air can effectively and rapidly reach a set temperature.

The invention relates to an air exhausting device and method of a discharged aluminum ladle, and is mainly used in the problem of air exhausting methods of the discharged aluminum ladle in electrolytic aluminum smelting industry. The structure of the air exhausting device is as follows: the ladle and ladle air exhausting outlets are connected with a compressed air pipe through an air hose, the compressed air pipe is arranged in an air exhausting pipe on the upper part of an electrolytic tank, an electrolytic tank gas collecting hood is arranged at the bottom of the air exhausting pipe, and the compressed air pipe is provided with nozzles. The air exhausting device has the advantages that: when aluminum in the electrolytic tank is discharged through the device, compressed air of the discharged aluminum ladle is discharged into the upper structure of the electrolytic tank, namely an upper part flue of the electrolytic tank, by preset of hole size and direction of a pipe in the flue, the compressed air is discharged according to certain direction, and the purpose of cleaning up dust stratification in the upper part flue and guiding the furnace internal air flow can be achieved.

The invention discloses a three-segment vertical type magnesium alloy cast-rolling flow distributing device. The quality of a magnesium alloy cast-rolling board can be effectively improved. The device comprises a straight pipe type drainage apparatus, a porous type dispersed flow distributing device and an inclined plate type buffer. A cylindrical channel is adopted in the straight pipe type drainage apparatus, and a plurality of flow guide holes in different sizes are formed in the porous type dispersed flow distributing device in the direction of the width of a casting roller at different intervals, or a retaining dam is arranged at the bottom, or an inclined bottom face for distributing the flow of each hole averagely is arranged at the bottom; the straight pipe type drainage apparatus is connected with the bottom of a smelting furnace, the porous type dispersed flow distributing device is connected with the bottom of the straight pipe type drainage apparatus, and the inclined plate type buffer is connected with the bottom of the porous type dispersed flow distributing device; the straight pipe type drainage apparatus plays a role in drainage; the porous type dispersed flow distributing device plays a role in uniformly distributing magnesium liquid; and the inclined plate type buffer relieves the impact of the magnesium liquid to a smelting pool, and the effect of further uniform flow distributing is achieved.

A one-building multi-purpose multifunctional natural temperature control shed building relates to the plant and house structures and the shed and greenhouse structures. The structural technical problem to be solved is that the industry projects to which the plant, house, shed and greenhouse are applied cannot be interoperable and the cost of temperature control is high. According to the embodiment, the main technical features are as follows: the shed building includes roof covers, strip-shaped roof covers, a function window, a drainage frame, a surrounding building wall, an elevated self-adjusting track heat preservation quilt roll-up device, an elevated self-adjusting track snow and dust cleaning device, and a sunshade net spread and storage device. The one-building multi-purpose multifunctional natural temperature control shed building not only can be used as a plant or a house, but also can be used as a shed or a greenhouse. The structural technical problem of high cost of temperature control throughout the year is solved. The one-building multi-purpose multifunctional natural temperature control shed building is an ideal construction facility for individual entrepreneurship, family prosperity, and enterprise investment and transformation.

The invention discloses a hot air drying assembly and a washing device. The hot air drying assembly comprises a shell, a heating element and overflow structures, wherein the shell is provided with anair inlet and an air outlet, an air channel communicating the air inlet with the air outlet is formed in the shell, and a washing tank overflow hole is further formed at the position, between the airinlet and the air outlet, of the shell; the heating element is arranged in the air channel, and is positioned between the washing tank overflow hole and the air inlet; the overflow structures are connected to the shell, and are provided with water outlets communicating with the washing tank overflow hole, and the opening degree, at the water outlets, of the overflow structures is increased under the effect of water flow. With the hot air drying assembly provided by the technical scheme of the invention, even if liquid enters the air channel form the air outlet, damage can not be caused to theinside heating element.

The invention discloses a control method of a marine floating object salvage and detection device. The marine floating object salvage and detection device is adopted to carry out salvage and detection. A salvage box is integrally installed at the front end of the upper part of a floating control mechanism, and a collecting net is arranged at the rear end of the lower part of the floating control mechanism. A hourglass is arranged at the bottom end of the salvage box, and drainage drive mechanisms are arranged on both sides of the hourglass. A steering control mechanism is arranged at the bottom end of the hourglass, and an energy storage detection mechanism is arranged at the bottom end of the steering control mechanism. Water in front of the salvage device is absorbed and discharged fromthe bottom through a drainage opening in the bottom of the marine floating object salvage and detection device, so that floating objects on the water surface are attracted around the salvage device; amotor is used as power, solar energy is used as a power source, so that the pollution to the environment is effectively reduced, the motor rotation drives blades at the drainage opening to rotate, sothat the effect of drainage is achieved; meanwhile, the motor rotation drives the blades to rotate to play the navigation role; and a detector is arranged to facilitate detection of seabed topography, changes in ocean currents, energy reserves, fish stocks and the like.

The invention discloses a double-head fixing type axial flow fan. The axial flow fan comprises a motor body, fan blades, a fixing bearing, and a machine shell, wherein the motor body is provided witha rotating shaft outputting rotating power, and the motor body comprises a stator and a rotor; the fan blades are assembled to one end of the rotating shaft; the fixing bearing comprises a head end bearing, and a tail end bearing which are arranged at the two axial ends of the rotor, and the head end bearing and the tail end bearing are fixed coaxial with the rotating shaft; the machine shell is wrapped on the outer side of the motor body; and the head end bearing and the tail end bearing are wrapped by a head wrapping ring and a tail wrapping ring respectively, the head wrapping ring and thetail wrapping ring are fixed to the machine shell through flow guiding pieces and connecting ribs, a hollow part is formed between the adjacent connecting ribs, and the machine shell forms a through air channel parallel to the axis direction of the rotating shaft. According to the double-head fixing type axial flow fan, the rotating shaft of the motor is limited by two bearings which are relatively far away from each other, and the two bearings are firmly fixed, so that vibration and jitter during operation of the axial flow fan can be controlled, and the influence of the arranged bearings onoverall wind resistance is very small.

The invention relates to an energy-saving thermal-insulation interior and exterior wall coating preparation system and a preparation process. The energy-saving thermal-insulation interior and exteriorwall coating preparation system comprises a fixed base, a mounting roller and a filtering device; the mounting roller is mounted at the upper end of the fixed base, and the filtering device is arranged in the mounting roller. The system can solve the problems that a traditional paint filtering device is too single in structure during filtering; generally, only a single filter screen is used for filtering; consequently, the filtering effect is not ideal enough, moreover, the filtering efficiency is not high, part of waste is still remained in the filtered coating, the overall quality of the coating is influenced; due to the fact that the coating has certain viscosity, in the filtering process, the coating often adheres to a traditional coating filtering device and is inconvenient to collect, and if the coating adhering to the filtering device needs to be collected, a certain amount of manpower and material resources need to be wasted.

The invention discloses a metering box convenient for heat dissipation, which comprises a shell. Mounting blocks are fixedly connected to the bottoms of the left side and the right side of the shell,fans are fixedly connected to the tops of the mounting blocks, air inlet pipes are fixedly connected to the tops of the fans, air outlet pipes are fixedly connected to the sides, close to the shell, of the fans, and the sides, away from the fans, of the air outlet pipes penetrate through the shell and extend into the shell to be sleeved with sleeves. Through mutual cooperation of the fan, the airinlet pipe, the air outlet pipe, the sleeve, a hose, an exhaust head, a balancing weight, a sliding rod, a sliding block, a through hole, a rolling pulley, a rotating motor, a rotating shaft, a forward rotating threaded rod, an annular block, a reverse rotating threaded rod, a threaded block, a fixing block, a sliding groove, a sliding block and a fixing rope, the effect of convenient heat dissipation is achieved, the problem that the metering box is inconvenient to dissipate heat is solved, local melting of a wire cannot be caused in a high-temperature environment, the service life of internal elements of the metering box is prolonged, and great convenience is brought to a user.