33 results about "Frost crack" patented technology

The invention provides a method for calculating the integral regulation and control opening degree of a shutter of an indirect air cooling tower, and the method comprises the steps: obtaining a target tower outlet water temperature theoretical value under different working conditions through a three-dimensional numerical simulation method based on parameters such as environmental meteorological parameters, a load ratio, a cooling margin and the like; and calculating according to the heat balance and the draft resistance balance of the cooling tower, and coupling to obtain a suggested value of the opening degree of the shutter. By adjusting the opening degree of the blind window and the air inlet amount, pipe bundle frost crack caused by too low temperature of the cooling triangle is avoided, winter freezing prevention of the indirect cooling tower is achieved, and a theoretical basis is provided for practical engineering implementation.

The invention provides an intelligent digital platform based on cold region highway disaster emergency disposal, and relates to the technical field of cold region highway emergency management. Comprising a cold region highway disaster database and knowledge graph module, an intelligent emergency disposal scheme recommendation module, a dynamic resource allocation module, a data updating and maintenance module, a platform iterative optimization module and a man-machine interaction module. According to the method, by combining the geographical environment and the knowledge graph of the cold region, the recommendation scheme considers the particularity of disasters such as ice and snow, frost heaving and the like, such as snow-melting agent type selection at low temperature, avoiding blind application of a general scheme, improving the disposal accuracy by more than 40%, and by priority ranking and path optimization, the resource arrival time is shortened by 30-50%, resource idling and waste are avoided, and the method is suitable for popularization and application. The emergency cost is reduced by 20%, the efficiency of resource allocation of the platform is improved, and based on user feedback and new technology iteration, the platform can adapt to new disaster types in cold regions, such as road surface frost cracks caused by extreme cold waves, and the practicability is kept for a long time.

The water path structure comprises a first filter element, a raw water path, a pure water path and a waste water path, one end of the raw water path is communicated with a raw water opening, the other end of the raw water path is communicated with a water inlet of the first filter element, a water inlet valve and a booster pump are arranged on the raw water path, and the booster pump is located between the water inlet valve and the first filter element; the pure water path is communicated with a pure water outlet of the first filter element; the wastewater path is communicated with a wastewater outlet of the first filter element, and an air inlet valve is arranged on the pure water path, so that external air can enter the pure water path; the water path structure further comprises an emptying water path, the water inlet end of the emptying water path is connected with the pure water path, the water outlet end of the emptying water path is connected with the raw water path, and an emptying valve is arranged on the emptying water path. The waterway structure and the water purifier can effectively prevent the problem of frost crack of the filter shell caused by freezing of water retained in the waterway and the filter element in a low-temperature environment, are reliable in operation, and do not influence the normal work of the whole machine.

The invention discloses a frost crack prevention overflowing water sterilization device which comprises a mounting sleeve, a sterilization module and a quartz tube and further comprises sealing end caps, and the sealing end caps are mounted at the two ends of the quartz tube; the sealing end cap comprises a base pad, a top seat, a sealing mechanism and an inner supporting mechanism, the top seat is arranged on one side of the base pad and abuts against the inner end of the mounting sleeve, a connecting hole is formed in the top seat, the inner supporting mechanism and the sealing mechanism are arranged on the other side of the base pad, and the end of the quartz tube is inserted between the sealing mechanism and the inner supporting mechanism; according to the anti-frost-crack overflowing water sterilization device, the quartz tube is mounted in the mounting sleeve through the two sealing end caps, a plurality of extrusion cavities are formed in the sealing end caps by optimizing the mechanisms of the sealing end caps, and meanwhile, the sealing end caps are integrally made of elastic sealing materials such as silica gel, so that when fluid in the quartz tube is frozen and expanded, the fluid in the quartz tube is prevented from being frozen and expanded; and the quartz tube has enough buffer space, so that the overall frost crack prevention performance of the device is effectively improved.

The utility model discloses a novel building foundation drainage structure, which relates to the technical field of building foundation drainage, and comprises a wall body, a roof is arranged at the top of the wall body, a drainage pipe is arranged on the roof, a sewer pipe is arranged on the wall body, and a water receiving hopper is inserted into the top of the sewer pipe; a mounting plate is arranged on the left side of the water receiving hopper, an air heater is arranged on the mounting plate, the air heater is communicated with an air supply pipe, the air supply pipe transversely penetrates through the water receiving hopper, accumulated snow on the roof is swept to all the drainage pipes, and then air is blown through the air heater, so that hot air enters a telescopic hose from the air supply pipe; and then the hot air enters the drainage pipe from the vertical pipe, and hot air can be upwards sent out, so that snow melting of the drainage pipe can be accelerated, rapid drainage is facilitated, the accumulated snow on the roof is rapidly discharged, the load of the roof is reduced, and a concrete layer of the roof is prevented from being cracked and damaged by frost.

The utility model discloses a pressing valve core capable of automatically discharging residual water in a pipe, which comprises an outer shell and a bottom shell arranged at the bottom of the outer shell, the bottom of a rotating rod is abutted against a piston capable of moving up and down, the top of the bottom shell is provided with a spring abutted against the piston, the piston is provided with a water passing pipe extending to the bottom shell, and the water passing pipe is connected with the rotating rod. The outer side of the bottom shell is provided with a water drainage hole and a water inlet hole, the inner side of the bottom shell is provided with a water outlet channel communicated with the water inlet hole, and the outer side of the water passing pipe is provided with a water drainage passing hole corresponding to the water drainage hole. The drainage device is simple in structure, when the pressing rod is pressed down and is not rebounded under the action of the rotating rod, the drainage through hole of the piston is communicated with the drainage hole and is in a drainage state, meanwhile, the water outlet channel is closed, and residual water in a water pipe is automatically and rapidly drained and does not drip continuously; the frost crack phenomenon of the water outlet pipe at the extremely low temperature and the scaling problem caused by the fact that residual water is not discharged out of silica gel water outlets of a top shower and a handheld shower head are avoided.

The utility model relates to a cooling water system of a shield pump and the shield pump comprising the cooling water system. The shield pump comprises a cooling water jacket, a cooling water inlet and a water outlet are formed in the bottom of the cooling water jacket, and the cooling water system comprises a first water inlet pipe, a water inlet hose, a second water inlet pipe, a first water outlet pipe, a water outlet hose and a second water outlet pipe. The first water inlet pipe is sequentially connected with the water inlet hose and the other end of the second water inlet pipe to form a water inlet passage; the first water outlet pipe is sequentially connected with the water outlet hose and the other end of the second water outlet pipe to form a water drainage channel; the first water inlet pipe is lower than the second water inlet pipe, and the first water outlet pipe is lower than the second water outlet pipe. Compared with the prior art, the water inlet hose and the water outlet hose have the hose flexibility, when the shield pump is stopped for drainage, drainage is easy, the risk of frost crack of the cooling jacket is avoided after rapid drainage, and normal operation of the shield pump is guaranteed.

The utility model discloses a filter, comprising: a base assembly, which is provided with a water inlet channel, a water outlet channel, an annular inner cavity and an annular outer cavity surrounding the outer side of the annular inner cavity, the water inlet channel is communicated with the annular outer cavity, and the water outlet channel is communicated with the annular inner cavity; a water purification channel is formed in the support, the lower end of the support extends downwards to form a connector part, the connector part is inserted into the annular inner cavity, and the water purification channel is communicated with the water outlet channel; the filter element is sleeved on the bracket; the shell covers the filter element and the bracket and is connected with the base assembly; the hollow hose is placed in the water purification channel, the length of the hollow hose is larger than 1 / 2 of the length of the filter element, and the water passing area of the hollow hose is larger than the water passing area between the outer wall of the hollow hose and the water purification channel. The hollow hose is placed in the water purification channel of the bracket, so that internal stress generated by freezing and swelling of the water body can be effectively resisted, and the filter element and the shell are prevented from being damaged due to frost crack deformation.

The utility model discloses a frost crack prevention instant heating device. The instant heating device comprises an instant heating device body, a water inlet pipe is arranged at one end of the instant heating device body, a water outlet pipe is arranged at the other end of the instant heating device body, a water flow pipeline allowing water flow to pass through is arranged between the water inlet pipe and the water outlet pipe, and a heating pipe is inserted into the water flow pipeline. The elastic sealing cover covers the opening of the water flow pipeline, and one end of the elastic sealing cover extends towards the heating pipe and is provided with a buffer rod; the buffer rods can absorb internal stress generated by expansion through self deformation when water in the water flow pipeline freezes and expands, and pipeline breakage caused by stress concentration is avoided. When water in the water flow pipeline freezes and expands, pressure generated by volume increase acts on the elastic sealing cover and the buffer rod; after the ice is melted, the buffer rod restores under the action of resilience force of the material, so that the device can be continuously used.

The invention discloses a water mixing system with a frost crack prevention technology, and belongs to the technical field of bathroom hardware. The water mixing system comprises a shell assembly, a water mixing valve is arranged on one side of the shell assembly, and a first water inlet channel, a second water inlet channel and a water mixing channel are formed in the shell assembly; the water outlet side of the first water inlet channel and the water outlet side of the second water inlet channel are communicated with the water mixing valve, the water outlet side of the water mixing valve is communicated with the water inlet side of the water mixing channel, at least one air trapping cavity is formed in the shell assembly, and the volume of the air trapping cavity accounts for 15%-20% of the total volume of the first water inlet channel, the second water inlet channel and the water mixing channel. The air trapping cavity is formed in the shell assembly, sufficient buffer space is provided for frozen and expanded water, the valve body is prevented from being broken from the source, and meanwhile the stability of the water mixing adjusting function is guaranteed.

The frost crack prevention water mixer comprises a water mixing channel shell and a frost crack prevention mechanism, the water mixing channel shell is provided with a cold water inlet, a hot water inlet, a water mixing cavity, a pressure relief opening and a plurality of water outlets, and the cold water inlet, the hot water inlet, the pressure relief opening and the water outlets are all communicated with the water mixing cavity; the frost crack prevention mechanism comprises a fixing block, a diaphragm and an elastic piece, the fixing block and the diaphragm are fixedly connected to the pressure relief opening, the diaphragm seals the pressure relief opening, one end of the elastic piece abuts against the fixing block, the other end of the elastic piece is fixedly connected with a cushion block, and the elastic piece is used for driving the cushion block to move in the direction away from the fixing block so that the cushion block can abut against the diaphragm. According to the frost crack prevention water mixer, the expansion volume of ice can be absorbed, and the possibility that the water mixing channel shell and the valve are cracked and damaged is reduced.

A fog-dispersal water-saving modified cooling tower relates to the technical field of cooling towers and comprises a tower body, and a water collecting device, a water distribution system and fog-dispersal water-saving filler are arranged in the tower body from top to bottom. The fog-dispersal water-saving packing is formed by bonding a plurality of dry packing sheets, a plurality of first heat exchange channels and second heat exchange channels which are independent from each other are formed through areas among the packing sheets, and the upper end of each fog-dispersal water-saving packing is vertically and fixedly connected with an upper partition plate which separates the first heat exchange channel from the second heat exchange channel. And the lower end part of each fog-dispersal water-saving filler is vertically and fixedly connected with a lower partition plate, and is divided into a plurality of first inlet channels communicated with the second heat exchange channel and a plurality of second inlet channels communicated with the first heat exchange channel through the lower partition plates. The utility model solves the problems of high energy consumption, scaling, frost crack risk and high reconstruction cost of the fog-dispersal water-saving reconstruction cooling tower in the traditional technology.

The utility model relates to the technical field of intelligent water meters, in particular to a frost crack prevention secondary sealing air bag bowl structure of an intelligent water meter. The intelligent water meter comprises an intelligent water meter body, a through opening is formed in the intelligent water meter body, an air bag bowl is arranged on the intelligent water meter body, the air bag bowl blocks the through opening, a sealing plate is arranged in the air bag bowl, and the sealing plate is installed on the air bag bowl in an ultrasonic welding mode. Original independence and stability of an inner cavity of the intelligent water meter body are kept through the structure of the integrated design of the air bag bowl and the sealing plate, a small part of volume can be expanded by means of elasticity of the sealing plate when water expands or freezes, and sealing of the inner cavity of the intelligent water meter body is guaranteed. The extrusion of the water expansion pressure on the counting gear box structure is buffered, all functions of the intelligent water meter can be recovered in time after the temperature of ice water rises, the risk of frost cracking of the water meter in the cold environment is avoided, and the maintenance cost of the intelligent water meter in the cold region is greatly reduced.

An anti-freeze crack device (2), including: a main body (21) and a plugging assembly (22). The main body (21) is provided with a cavity (210) with an open end, and the open end of the cavity (210) is configured to communicate with a water chamber (10) of a water outlet valve (1). The plugging assembly (22) is disposed within the cavity (10) and can be switched between a first state in which the open end is closed and a second state in which the open end is opened.

The invention discloses a disc type asphalt concrete low-temperature frost crack test method and device, and belongs to the technical field of hydraulic engineering and road engineering material tests. The device comprises a disc clamp system, a leveling cementation layer simulation structure, an angle adjustable structure, a low-temperature constant-temperature test box, a strain monitoring system and a control module. The disc clamp system consists of an upper disc clamp and a lower disc clamp and is used for clamping a circular test piece and simulating actual constraint of a peripheral panel; the leveling cementation layer simulation structure is arranged at the upper part of the lower disc and simulates lower constraint; and the angle adjustable structure can realize adjustment within a certain angle range. During testing, a test piece is installed in the clamp, the temperature is reduced in the low-temperature constant-temperature box according to a set program, the strain of the test piece is collected in real time through the strain monitoring system, and the frost crack temperature is automatically judged by the control module according to strain mutation. According to the invention, the multidirectional constraint state of the asphalt concrete panel in an actual structure can be truly simulated, the test result is accurate, and the engineering applicability is high.

The utility model provides an anti-freezing ball valve which comprises a valve body, the valve body is provided with a valve cavity, an inlet and an outlet are formed in the two sides of the valve cavity respectively, the inlet and the outlet are both provided with connecting flanges, and a ball core controlled to rotate through a valve rod is arranged in the valve cavity. The ball core is provided with a through hole which faces the inlet and the outlet or is staggered with the inlet and the outlet during rotation, the inlet is provided with a first valve seat which is pushed by one connecting flange and abuts against the ball core, and the outlet is provided with a second valve seat which is pushed by the other connecting flange and abuts against the ball core. The first valve seat and the second valve seat are annular, and annular extrusion faces are arranged at the positions, making contact with the ball core, of the first valve seat and the second valve seat. And the inlet is connected with the valve cavity at the outer wall of the ball core through a flow guide channel. The utility model has the advantages of simple structure and capability of avoiding frost crack caused by low temperature.

The utility model discloses a connecting structure for a PE pipe, and belongs to the technical field of PE pipe connecting auxiliary structures. The device comprises a left pipe body and a right pipe body, the right side of the left pipe body is connected with an external threaded pipe, the left side of the right pipe body is connected with an internal threaded pipe matched with the external threaded pipe, square grooves are formed in the periphery of the inner wall of the right pipe body, moving blocks are slidably connected into the square grooves, the right sides of the moving blocks are connected with moving rods, and the surfaces of the moving rods are sleeved with compression springs. Rubber films are arranged on the surfaces of the pressure springs. The solar storage battery panel supplies power to the heating wire to heat the heating wire, the connecting position in the heat insulation cover is heated, water seepage, freezing and expansion of the connecting position are avoided, and therefore water seepage at the connecting position, outdoor pipeline connection and freezing and expansion of water in a pipe fitting in cold weather are effectively prevented, and the service life of the pipe fitting is prolonged. And the conditions of frost crack deformation and water leakage at the joint are avoided.

The utility model relates to the technical field of freezing water tanks, and discloses a freezing water tank which comprises a tank body with a containing cavity, and the tank body is formed by combining and fixing at least two parts in a detachable connection mode. A water filling opening and a water discharging opening which are communicated with the interior of the box body are formed in the box body and used for filling water and discharging water inwards respectively, and a deformation structure is further arranged on the box body and used for deforming outwards under the action of external force after water is frozen so that the internal volume of the box body can be increased, and then the box body can be effectively prevented from being broken. According to the utility model, the volume of the box body can be changed through adaptive deformation of the box body, so that the box body can be prevented from frost cracking in freezing weather.

The utility model discloses a frost crack prevention valve which comprises a valve body, the left end and the right end of the valve body are each provided with a flange plate, a valve element assembly is installed in the valve body, a boss is arranged on the outer curved surface of the valve body, a circulation hole communicated with the interior of the valve body is formed in the table top of the boss, and a pressure relief assembly is installed on the boss. The pressure relief assembly comprises a shell arranged outside the valve body, an abutting ring is arranged on the outer curved surface of the shell, when the interior of the valve body is frozen to enable a medium in the valve body to expand, the pressure relief assembly can conduct pressure relief work to a certain degree so as to prevent the valve body from being damaged, in addition, an indicating rod is further arranged in the pressure relief assembly, and the indicating rod is used for indicating the pressure of the valve body. A worker can conveniently know whether a medium in the valve body is frozen or not; the pressure relief assembly is obliquely arranged, so that the damage to the valve body caused by a water hammer phenomenon when the valve is closed or opened can be relieved.

The utility model belongs to the field of sanitary ware and bathroom accessories, and particularly discloses a frost crack prevention closestool with a novel water outlet structure. According to the utility model, the interior of the seat ring at the top of the closestool main body is of a solid structure, which is a key creation point of the closestool; more than one water outlet hole is formed in the closestool cavity, and the water outlet hole is connected with a water source through a water outlet structure arranged in the closestool main body. According to the utility model, the purpose of frost crack prevention is realized by carrying out solid treatment on a water accumulation part which is easy to frost crack and simultaneously improving a water outlet structure.

The utility model discloses a concrete anti-freezing structure which comprises a foundation body, reinforced concrete is installed in the foundation body, the concrete anti-freezing structure further comprises an anti-freezing mechanism, the anti-freezing mechanism comprises an installation layer arranged above the foundation body, and a heat preservation assembly is installed in the installation layer. A frost heaving prevention layer is arranged above the foundation body, a foundation reinforcing layer is arranged in the foundation body, and a heat preservation layer is arranged at the bottom end of the foundation body. The stabilizing mechanism is arranged in the reinforced concrete, the stabilizing mechanism comprises a main reinforcing steel bar arranged in the reinforced concrete, and an auxiliary reinforcing steel bar is installed at the position, located on one side of the main reinforcing steel bar, in the reinforced concrete. The problems that existing concrete is prone to frost heaving due to the influence of low temperature in an outdoor low-temperature environment, so that frost cracks occur in the concrete, and normal use of the concrete is affected are solved.

The utility model relates to solar water heater technical field especially relates to a solar water heater pipeline anti -frost crack device, including the water heater main part, the upper end of water heater main part is provided with the water tank, the inboard of water tank is provided with heating assembly, the outside of water tank is provided with the heat preservation storehouse, the upper end of heat preservation storehouse is provided with the heat preservation board, the front and back sides of heat preservation board are provided with the limit slot, the front and back sides of heat preservation storehouse are fixedly installed with the limit seat, the outside of limit seat is provided with locking screw rod, the outside of locking screw rod is provided with the limit block, the left and right sides of limit block are provided with the limit board, the right side of water tank is connected with the water inlet and outlet pipe, the outside of water inlet and outlet pipe is provided with the heat preservation cover, the outside of heat preservation cover is provided with locking assembly, the utility model discloses through the rotation locking screw rod control limit block and limit slot interlock, realizes the quick fixation to heat preservation board, the heat preservation cover is set up in the water inlet and outlet pipe outside, through the locking assembly is connected in the heat preservation cover outside, realizes the fixation to heat preservation cover.

The utility model relates to the technical field of water pipe frost crack prevention, and discloses a heat preservation device for preventing a water pipe from frost crack, which comprises a pipeline and a connecting valve, a first heat preservation sleeve is arranged on the outer side of the pipeline, a second heat preservation sleeve is arranged on the rear side of the first heat preservation sleeve, and first connecting blocks are fixedly connected to the left side and the right side of the top of the first heat preservation sleeve. Connecting blocks II are fixedly connected to the left end and the right end of the top of the heat preservation sleeve II, threaded rods are in threaded connection to the sides, adjacent to the connecting blocks II, of the connecting blocks I, rotary knobs are fixedly connected to the front sides of the threaded rods, connecting ropes are arranged at the top of the heat preservation sleeve I, and connecting structures are installed on the left side and the right side of the pipeline. The connecting structure is used for connecting pipelines. In the utility model, in order to preserve heat of the pipeline, the heat preservation sleeve I and the heat preservation sleeve II are wrapped outside the pipeline, the threaded rod is rotated by the knob, and the connecting block I and the connecting block II are close to each other due to threaded connection, so that the heat preservation sleeves cling to the pipeline.

The utility model relates to the technical field of telegraph poles, and discloses an anti-frost-crack annular concrete telegraph pole which comprises a telegraph pole body and a base, a drainage groove is formed in the telegraph pole body, a sleeve is fixedly connected to the top of the base, the telegraph pole body is fixedly connected to the interior of the sleeve, and a drainage assembly is arranged on the outer wall of the telegraph pole body. A drainage assembly is arranged in the sleeve and comprises a first clamping ring and a second clamping ring, the first clamping ring is slidably connected to the outer wall of the telegraph pole, the second clamping ring is slidably connected to the outer wall of the telegraph pole, and the second clamping ring is fixedly connected to one side of the first clamping ring. According to the utility model, the snap ring I and the snap ring II are pulled to slide on the outer wall of the telegraph pole, and rainwater is discharged into the sleeve through the drainage groove and the drainage layer and then is discharged through the drainage pipe, so that the effect of effectively preventing the telegraph pole from frost cracking is realized, and the problem that huge extrusion force is generated on the telegraph pole along with temperature reduction, snow accumulation and freezing is solved; and concrete of the telegraph pole is easy to crack.

The utility model discloses a urea pump assembly with an anti-frost-crack shell, which comprises the shell, a water inlet pipe, a water outlet pipe and an electromagnetic valve, the water inlet pipe, the water outlet pipe and the electromagnetic valve are arranged in the shell, and elastic fillers are arranged in the water inlet pipe and the water outlet pipe. The device has the advantages of capability of automatically absorbing and expanding, low use difficulty, low application cost and the like.

The utility model relates to the technical field of PE (polyethylene) pipes, in particular to a PE pipe with an anti-frost-crack structure, which comprises a pipe body, two sides of the pipe body are connected with positioning plates, the outer wall of each positioning plate is sleeved with a heat preservation ring pad, the surfaces of two ends of each heat preservation ring pad are abutted against rubber pad rings, the outer wall of each rubber pad ring is sleeved with a limiting ring, and the limiting rings are sleeved on the outer wall of each heat preservation ring pad. Threaded rings are rotationally connected into the two ends of the limiting ring. The heat preservation ring pad is connected to the outer surface of the positioning plate in a sleeved mode, the heat preservation ring pad is positioned through the positioning plate, then the rubber pad ring is connected to the outer walls of the two ends of the positioning plate in a sleeved mode, one end of the threaded ring is rotationally connected into the threaded groove formed in the limiting ring, and the two ends of the pipe body are limited; and the rubber backing ring is used for enabling the heat preservation ring pad to make flexible contact with the threaded ring, so that frost crack prevention protection is conducted on the pipe body, and the problem that normal use is affected due to the fact that the pipe body is frozen and fractured due to low temperature is solved.

The utility model discloses a frost crack prevention mechanism and a water pump body thereof, comprising a heating wire used for providing heat, a wrapping sleeve used for installing the heating wire, a thermal insulation layer used for preventing the heat generated by the heating wire from overflowing, and an air hole used for conveying the heat generated by the heating wire, the mounting part is used for fixedly mounting the wrapping sleeve; by means of the design of the heating wire, the wrapping sleeve, the heat insulation layer and the installation piece, the wrapping sleeve is arranged on the outer wall of the pump body in a sleeving mode, the magnetic attraction strip and the outer wall of the pump body are firmly attracted through magnetism, the wrapping sleeve is fixedly wrapped on the outer wall of the pump body, the heating wire is electrified to heat, the cavity is filled with generated heat, and the heat insulation layer is arranged in the cavity along with the vent holes. The heat is in contact with the pump body to heat the pump body, and the heat is conducted into the pump body, so that the water flow cannot be frozen, and the condition of frost crack of the pump body is prevented.

The utility model relates to the technical field of vertical self-priming pumps, and discloses a vertical self-priming pump which comprises a motor and a pump body, the upper portion of the pump body is connected with the lower portion of a connecting base through a plurality of second bolts, the middle side of the lower portion of the motor is fixedly connected with a third flange, and the third flange is connected with the upper portion of the connecting base through a plurality of first bolts. A bearing is fixedly connected to the middle side of the upper portion of the connecting base, a connecting shaft is fixedly connected to the middle side in the bearing, a gear groove is formed in the middle side of the upper portion of the connecting shaft, and a gear is fixedly connected to the output end of the motor. According to the utility model, the water inlet pipe is provided with the filtering mechanism containing multiple layers of filter screens and the precipitation pipe, so that the problem that the impeller is possibly damaged by entering of large particles is solved, and precipitation particles can be cleaned and the filter screens can be replaced when operation is stopped; in cold days, ice in the pump body can be melted by means of the heating cylinder, the heating pipe and the like, and the problems of frost crack and the like are prevented.

The utility model discloses a frost crack prevention shower faucet which comprises a shell, an inner core and a pressure relief device. The inner core is installed in the shell and comprises a cold water channel, a hot water channel, a mixed water channel and a plurality of water outlet channels. The cold water channel and the hot water channel are communicated with a temperature control valve element, the temperature control valve element is installed between the cold water channel and the water mixing channel, and control valve elements with the number matched with that of the water outlet channels are installed between the water mixing channel and the water outlet channels. The cold water channel and the mixed water channel are respectively provided with a pressure relief device; compared with the prior art, the anti-frost-crack shower faucet has the advantages that the position of the movable head is changed, so that an expansion space when outlet water is iced can be avoided, the situation that the inner core is squeezed to be cracked is avoided, and the stability of the product is greatly improved.

The utility model discloses a frost crack prevention spray irrigation pipeline structure for agricultural irrigation, which comprises a body mechanism and an integrated heat preservation mechanism which is arranged on the outer side of the body mechanism, enables heat preservation materials to be evenly wrapped on the outer wall of a pipeline at a time through integral stretching, simplifies operation procedures and guarantees anti-freezing effects. The integrated heat preservation mechanism comprises shock insulators which are movably connected to the outer side of the spray irrigation pipeline and are symmetrically arranged, the side frames on the upper portion are fixed, erection of heat preservation materials on the outer wall of the spray irrigation pipeline is completed, the situation that workers manually coil the heat preservation materials on the outer wall of a pipe body circle by circle can be reduced while the anti-freezing capacity of the pipe body is guaranteed, and the work efficiency is improved. And under the condition that the operation process is simplified and the physical output of personnel is reduced, the situation that the anti-freezing effect of the pipe body is reduced due to the fact that part of the outer wall of the pipe body is directly exposed in the external environment due to non-uniform wrapping thickness of the thermal insulation material or gaps between the materials in the manual coiling process is also reduced.