53results about How to "Avoid direct contact with friction" patented technology

The invention discloses a convenient-to-remove chip vertical hole punching device for an industrial plate. The vertical hole punching device comprises a work table, wherein the outer surface of the upper end of the work table is fixedly provided with a device case; a No.1 air cylinder is arranged in the middle position of the outer surface of the upper end of the device case; a No.2 air cylinder and a No.3 air cylinder are respectively arranged in positions, near the bottom end, of two sides of the device case; a control panel is fixedly arranged above the No.3 air cylinder; a No.1 hydraulic telescopic rod is arranged at the bottom end surface of the No.1 air cylinder and is positioned in the middle position of the upper end inside the device case. The convenient-to-remove chip vertical hole punching device for the industrial plate disclosed by the invention has the advantages that the position limiting fixation on the transverse direction and the vertical direction of the plate can berealized, so that high stability is realized during the hole drilling; the hole punching device is applicable to the hole drilling on plates with different widths and heights; wood chips on a bufferpad plate can be timely discharged out; the hole drilling on the plate can be slowly performed; the hole drilling precision is higher; the energy source consumption and the abrasion between componentscan be reduced.

The invention discloses a novel dynamic-static hybrid tilting pad radial gas bearing which mainly consists of an integrated tilting pad radial gas bearing body, a porous pad surface, a porous pad surface clamping board, a compressible gasket, a gas inlet tube and a tapered cap, wherein a tilting pad block of the integrated tilting pad radial gas bearing body is provided with a groove structure in an axial direction; the porous pad surface adopts a shaft shoulder type structure and is embedded into the groove structure of the tilting pad radial gas bearing body to form peripheral positioning and clamping, is pasted on the inner wall of the integrated tilting pad radial gas bearing body through coaxial glue, and is axially clamped by virtue of a flange structure on the porous pad surface clamping board to form axial positioning and clamping. The novel dynamic-static hybrid tilting pad radial gas bearing can effectively improve stability of the bearing, can prevent a shaft neck and a bearing surface from direct contact friction and can reduce abrasion to a bearing pad, is good in bearing heat dissipation, uniform in bearing temperature distribution and relatively small in temperature rise; and a thermal expansion problem is relieved.

The invention discloses a self-locking height adjustable table which includes a table top, front supporting legs, back supporting legs and an adjustment device. The adjustment device includes a self-locking air spring, a sliding bar, a sliding sleeve sleeved on the sliding bar, and a cross rod with two ends hinged to the back supporting legs. The sliding rod is longitudinally arranged at the bottom of the table top. The self-locking air spring is arranged in the sliding rod, and includes a cylinder, a piston rod and a release pin arranged on the piston rod. The front end of the piston rod is fixed on the sliding rod, the cylinder is fixed on the sliding sleeve through a bolt, and an elongated through hole is formed in the corresponding position of the piston rod. The bolt can penetrate through the elongated through hole and can slide along a strip of the through hole. The self-locking height adjustable table is simple in structure and reasonable in design, can stop at any position in the stroke by aid of the self-locking air spring, accordingly can adjust the included angle formed by the front supporting legs and the back supporting legs, and correspondingly the height of the table top can change. The self-locking height adjustable table is convenient to use.

The invention discloses a height adjustable horizontal bar for sports, comprising a pillar, wherein the inner cavity of the pillar is provided with a vertical rod, the top end of the vertical rod penetrates the pillar and extends to the outer part of the pillar and is fixedly connected with a transverse rod, the two sides of the vertical rod are fixedly connected with sliding sleeves, the inner cavity of the sliding sleeve is fixedly connected with the sliding rod, and the upper and lower ends of the sliding rod are welded with the inner wall of the pillar. In accordance with that present invention, vertical bar, sliding sleeve, rack, first gear, second gear, Rotating rod, bearing housing, Setting of swing lever and swing handle. The height of the horizontal bar for sports can be adjustedby manual rotation of the swing handle, so that the height of the horizontal bar can be adjusted, and at the same time, the problem that most of the traditional horizontal bars for sports are fixed structure, and the height is not adjustable, so that the students with large height difference are easy to cause arm injury when using the horizontal bar, and the safety hidden danger is caused.

Compared with the prior art, the invention provides a lubricating oil composition for a supporting roller large bearing shell of a rotary kiln. The composition comprises the following components in percentages by mass: 5-10% of poly alpha-olefine, 65-79% of brightening oil, 15-25% of a thickener, 0.1-5.0% of an anti-oxidant, 0.01-0.5% of a metal deactivator, 0.1-5.0% of a corrosion inhibitor, 0.5-5.0% of an anti-wear reagent at extreme pressure, and 0.0005-0.05% of anti-foaming agent. The lubricating oil composition for the supporting roller large bearing shell of the rotary kiln has the performances of good abrasion resistance, oxidation resistance, emulsion resistance, corrosion resistance, extreme pressure resistance, high temperature resistance, etc. The lubricating oil composition has a high viscosity coefficient index, so that an oil film of a certain thickness can be formed during normal working of the supporting roller bearing shell, direct contact friction between a supporting roller bearing and a shell is avoided, the supporting roller bearing and the lining shell are effectively protected, and the probability of high temperature at the supporting roller bearing shell is reduced.

The invention relates to the field of geogrids, in particular to a soil slope geogrid laying and mounting method. The soil slope geogrid laying and mounting method aims to solve the technical problems. According to the technical scheme, the soil slope geogrid laying and mounting method uses the following machining equipment comprising a lowering and laying system, a slope surface protection system, a first supporting leg frame, a second supporting leg frame and a third supporting leg frame, and the lower part of a mounting rack plate is in bolt connection with an embedded mounting bottom block. According to the soil slope geogrid laying and mounting method, automatic laying of the soil slope surface is achieved, a supporting structure is formed for the slope surface before laying, so that direct contact friction between the slope surface and a geogrid in the laying process is avoided, the situation that the geogrid rubs against a slope to damage the structure of the slope is prevented, and the effects of stable and rapid laying and soil slope protection are achieved.

The invention discloses an elevator weight test device and method. The elevator weight test device comprises a controller and two trolleys with a same structure; one trolley is marked as a test trolley, and the other trolley is marked as a control trolley; each trolley is provided with a water tank, a water pump, a weighing sensor and a display screen; a water inlet of each water pump is communicated with the corresponding water tank; a water outlet of each water pump is provided with a flow sensor and is communicated with one end of a water pipe; the other end of the water pip can be communicated with the water tank of the other trolley; each weighing sensor is arranged at the bottom of the corresponding water tank; and the water pumps, the flow sensors, the weighing sensors and the display screens of the two trolleys are electrically connected with the controller. For the elevator weight test device, the test trolley is remotely controlled by the controller to perform a related weight test; a person does not need to enter an elevator car in the whole process to be prevented from being damaged by accidents of sudden shearing, elevator slip and the like of the elevator in the testprocess, and automatic uniform loading can be realized without needing that a person carries a weight back and forth, so that the test time is shortened, the labor intensity is lowered, and the efficiency and the safety of the weight test are greatly improved.

The invention discloses a display device. The display device is used for avoiding curling and closing of an unfolded display product, so that the display product is kept in a flat state during use, and the user experience is improved. The display device provided by the embodiment of the invention comprises a flexible display panel and a support frame assembly, wherein the flexible display panel has a display area and peripheral areas which surround the display area, and the support frame assembly is connected with the flexible display panel in the peripheral areas; and the support frame assembly comprises first support frames arranged at the opposite peripheral areas, and each first support frame is a rollable support frame.

The invention provides a pneumatic toothbrush, relates to the technical field of oral cleaning equipment, and the technical problems of easy friction, short service life and poor cleaning effect of ahairbrush type toothbrush head in the prior art are mainly solved. The pneumatic toothbrush comprises a pressure storage device, a liquid storage tank and a toothbrush body, and the pressure storage device is connected with the liquid storage tank through a pipeline; the liquid storage tank stores cleaning liquid, and the liquid storage tank is in communication with the toothbrush body through thepipeline; and the toothbrush body comprises a toothbrush head and a jet hole, and the jet hole is formed in the toothbrush head so that the cleaning liquid in the liquid storage tank can enter the toothbrush body under the action of the pressure storage device and jet out from the jet hole. According to the pneumatic toothbrush, high-pressure gas is provided by using the pressure storage device,the cleaning liquid in the liquid storage tank can be quickly ejected from the jet hole under the action of the high-pressure gas, and tooth washing is realized. Therefore, when cleaning teeth, the pneumatic toothbrush does not need direct contact and / or friction between the toothbrush head and the tooth surface so as to avoid the abrasion of the toothbrush head and prolong the life of the toothbrush.

The invention discloses a windproof high-rise steel structure vertical correction device, and relates to the technical field of high-rise steel structure vertical correction. The problem of measurement efficiency is solved. The device specifically comprises two clamping mechanisms, the output ends of the two clamping mechanisms are provided with two clamping rings, the four clamping rings are connected with the same steel column in a clamped mode, the opposite sides of the two clamping mechanisms are provided with the same telescopic rod, the end of one side of the telescopic rod is provided with a perpendicularity rolling measuring mechanism, the outer wall of the back face of the telescopic rod is provided with a handle, a display screen is arranged on the outer wall of one side of the telescopic rod, each clamping mechanism comprises a second air cylinder, two fixing blocks, two clamping blocks, two first guide rods, two L-shaped supporting rods, two connecting rods, a fixing shaft, two second guide rods and a sliding sleeve, and one end of each fixing shaft is arranged at one end of the corresponding telescopic rod. According to the device, a measurer can quickly obtain a perpendicularity measurement result, the steel column measurement efficiency and quality are improved, and carrying and operation are convenient.

The invention discloses an airflow circulation electromagnetic heat drying LED underground lamp, which comprises a convex outer shell, wherein the bottom part of an inner cavity of the convex outer shell is fixedly connected with a rubber end cover; a vibration supporting rod is fixedly connected to the inner surface of the inner cavity of the convex outer shell and located on the outer side of the rubber end cover; the side, close to the convex outer shell, of the vibration supporting rod is fixedly connected with airflow mechanisms; an electromagnetic heat drying mechanism is fixedly connected between the airflow mechanisms on the inner surface of the convex outer shell; a magnetic supply mechanism is movably connected to the end, away from the convex outer shell, of the vibration supporting rod; a driving mechanism is movably connected to the inner surface of the magnetic supply mechanism; an adjusting mechanism is movably connected to the top part of the convex outer shell; and anLED lamp is movably connected to the inner surface of the adjusting mechanism. The airflow circulation electromagnetic heat drying LED underground lamp relates to the technical field of LED, an internal magnetic field is changed through treading, electromagnetic induction heating is used for drying surrounding soil, equipment is prevented from falling down, water permeation is avoided, and the safety of the equipment and the surrounding environment is protected.

The invention discloses a road garbage cleaning and collecting device, which includes the vehicle body, and a movable frame arranged at the bottom of the front of the vehicle body; the top end of themovable frame is articulated with the vehicle body, A cleaning mechanism for cleaning the floor and collecting garbage is arranged at the bottom of the movable rack, the cleaning mechanism includes afirst electric roller and a second electric roller, and a brush sleeve is sleeved on the exterior of the first electric roller and the second electric roller, the first electric roller and the secondelectric roller are rotated in opposite directions, the invention can support a first electric roller and a second electric roller through a movable frame, the first electric roller can be well protected, the brush sleeve can be driven to rotate by a first electric roller and a second electric roller which are relatively rotated, When the brush sleeve on the first electric roller is in contact with the rubbish on the ground, the rubbish can be swept upward, and then the rubbish is led into the vehicle body by the brush sleeve on the second electric roller, so that the rubbish on the ground canbe not only swept but also collected.

The invention provides a clutching type traction motor which comprises an electromagnetic clutch and a motor, wherein the electromagnetic clutch is fixed on the motor and driven by the motor, and the separation and reunion of the electromagnetic clutch are linked in starting and stopping of the motor. The clutching type traction motor achieves integration of the motor and the electromagnetic clutch, so that the electromagnetic clutch closes and separates automatically when the motor is started and stopped; and the clutching type traction motor does not require manual operation, is convenient to use and simultaneously has the advantages of being reliable in working and low in manufacture and maintenance cost.

The invention relates to a sectional type oil drill pipe with a seal structure. The sectional type oil drill pipe comprises a main pipe body and a joint body, wherein the main pipe body and the joint body are respectively and internally provided with a through hole penetrating through the main pipe body and the joint body; one end of the main pipe body is provided with an external thread joint; the inner wall of the other end of the main pipe body is provided with internal threads; the external thread joint is smaller than the main pipe body in external diameter; one end of the joint body is provided with an internal thread joint matched with the external thread joint; the other end of the joint body is provided with a conical joint; a plurality of elliptical concave grooves matched with a seal ring are formed in the end part of the external thread joint; a concave groove is formed at a part, matched with the end part of the external thread joint, of the internal thread joint; the concave groove is matched with the seal ring. According to the sectional type oil drill pipe, as the end face of the external thread joint is provided with the elliptical concave grooves matched with the seal ring, and the elliptical concave grooves are matched with the concave groove in the internal thread joint, not only is the seal performance improved, but also the insertion of the seal ring is facilitated so that the seal ring is unlikely to fall.

The invention discloses a suspension piston type cylinder component, which comprises a cylinder, a piston and a closed crankcase. The crankcase is in butt joint and sealed with the cylinder, the piston is in clearance fit with the inner wall of the cylinder, the cylinder is in sliding seal with the piston without a sealing ring, a gas recharge pipeline is connected onto a side wall of the crankcase, is connected onto the cylinder and corresponds the position below a top dead center of the piston, a cooling liquid inlet is arranged on a side wall of the cylinder and communicated with a high-pressure cooling liquid container via a channel, a control valve is disposed on the channel, and the cooling liquid inlet is positioned on the side wall of the cylinder and corresponds to an area between the top dead center and a bottom dead center of the piston. The suspension piston type cylinder component has the advantages that leaking gas of the suspension piston can be recharged into the cylinder via the gas recharge pipeline without leaking to the outside of a closed space encircled by the cylinder and the crankcase, so that burning high-pressure gas is sufficiently utilized assuredly.

The invention discloses a lifting multipurpose dining table which comprises a table top, front support legs, rear support legs and an adjusting device. The adjusting device comprises a self-locking air spring, a sliding rod, a sliding sleeve sleeving the sliding rod and a cross rod fixed on the sliding sleeve with two ends hinged to the rear support legs. The sliding rod is vertically arranged at the bottom of the table top, and the self-locking air spring is arranged in the sliding rod. The self-locking air spring comprises a cylinder body, a piston rod and a release pin arranged on the piston rod. The head end of the piston rod is fixed on the sliding rod, the cylinder body is fixed on the sliding sleeve through a bolt, and a long-strip-shaped through hole for the bolt to penetrate and slide along the long strip is formed in the piston rod at the corresponding position. The lifting multipurpose dining table is simple in structure and reasonable in design, the included angle between the front support legs and the rear support legs can be adjusted and fixed by ingeniously utilizing the fact that the piston rod of the self-locking air spring can stop at any position in a journey, the height of the table top can be changed with the include angle, and the dining table is convenient to use.

The invention provides an intelligent dynamic pressure bearing. A control system of the bearing comprises a sensor and a control unit, wherein the sensor is used for monitoring at least one operationparameter of a bearing body or a rotor supported by the bearing body and sending the monitored parameter to the control unit; the at least one operation parameter is used for at least characterizing arotary speed of the rotor or at least characterizing an operation load of the bearing body or the rotor. When the rotary speed of the rotor is less than a pre-set speed or when the operation load ofthe bearing body or the rotor is greater than a pre-set load, lubrication liquid is supplied to the bearing body through a liquid supply system, so that the intelligent dynamic pressure bearing is used as a liquid dynamic pressure bearing to work. When the rotary speed of the rotor is greater than or equal to the pre-set speed and when the operation load of the bearing body or the rotor is less than or equal to the pre-set load, the liquid supply system stops supplying the lubrication liquid to the bearing body, so that the intelligent dynamic pressure bearing is used as a gas dynamic pressurebearing to work. The intelligent dynamic pressure bearing has the advantages of the gas dynamic pressure bearing and the liquid dynamic pressure bearing.

The invention relates to the field of glass flour sewage, in particular to a volute type sludge dehydrator applied to glass flour and water separation. The volute type sludge dehydrator comprises a rack, a stirring flocculation device and a dehydrating device. The dehydrating device comprises a water receiving tank, a spiral shaft and a volute body. The volute body comprises a fixed ring and a movable ring. A drainage outlet is formed in the water receiving tank. The stirring flocculation device comprises a water collecting tank, a water suction pipe and a water pump. A water inlet pipe, a drug inlet pipe and a drainage pipe are arranged on the water collecting tank. The drainage pipe communicates to the dehydrating device. A butterfly valve is arranged on the drainage pipe. The water collecting tank is divided into a reaction chamber, a settling chamber and a clean water cavity through three partition plates. A first overflow port is formed in the partition plate between the reactionchamber and the settling chamber, and a second overflow port is formed in the partition plate between the settling chamber and the clean water chamber. The dehydrator solves the technical problem in the prior art that the water collecting part is easily blocked and the drainage efficiency is low as glass flour and water are separated.

The invention relates to comfortable-wear underwear and the manufacturing method. The underwear consists of a garment piece and accessories which comprise a facing, a gallus and a trademark or a flat piece of leave-factory label. Through taking the smooth surface of the garment piece as the close-fitting surface of the underwear and adopting the method of attaching and sewing the close-fitting surface to close-fitting surface when splicing sewing is performed between the garment pieces or between the garment piece and the accessories, the splicing seam is made to be arranged on the outer surface of the underwear, and the trademark or factory label are made to be arranged on the outer surface of the underwear in the form of patch or printed pattern, which avoids the direct contact friction between the patches of seam, trademark or factory label as well as the rough surfaces of costuming and human skin, increases the comfort level of wearing, avoids the direct contact friction between human skin and the connecting yarn on the seam, reduces the probability of abrasion of the sewing connecting yarn, and is beneficial to ensure the effective life-span of the underwear. Compared with the underwear of the prior art, the invention has the obvious advantages of more scientific structure, more close-fitting and comfortable wear and longer life-span.

The invention provides a composite dynamic / static-pressure slide bearing. The composite dynamic / static-pressure slide bearing comprises a bearing inner sleeve and a bearing outer sleeve, wherein the bearing inner sleeve is arranged in the bearing outer sleeve; an original gap is formed between the bearing inner sleeve and the bearing outer sleeve; the bearing outer sleeve is provided with a liquid supply port; the liquid supply port is communicated with the original gap; a thrust cavity is formed between the end surface of one end of the bearing outer sleeve and the bearing inner sleeve; and the liquid supply port is communicated with the thrust cavity through the original gap. The composite dynamic / static-pressure slide bearing further comprises a shunt cavity; the shunt cavity is formed in the inner wall surface of the bearing outer sleeve; and the liquid supply port is communicated with the thrust cavity through the shunt cavity. The composite dynamic / static-pressure slide bearing is provided with the thrust cavity, the original gap and the liquid supply port, so that the axial force is balanced, and a liquid film is formed between the bearing inner sleeve and the bearing outer sleeve to prevent direct contact friction between an inner ring and an outer ring. According to the composite dynamic / static-pressure slide bearing, a peripheral bearing and a radial bearing are integrated into one bearing, so that the function of the radial bearing is realized when the bearing balances the axial force of a spaceflight mechanical pump.

The invention discloses a dynamic and static pressure hybrid tilting pad radial gas bearing, which mainly consists of an integrated tilting pad radial gas bearing body, a porous tile surface, a porous tile surface clamping plate, a compressible gasket, an air intake pipe, Composed of a conical cap, the tilting pad of the integrated tilting pad radial gas bearing body is provided with a groove structure in the axial direction, the porous pad surface adopts a shoulder structure, and is embedded in the radial direction of the tilting pad. In the groove structure of the gas bearing body, a circumferential positioning clamp is formed, and it is closely attached to the inner wall of the one-piece tilting pad radial gas bearing body by coaxial glue, and is clamped on the board through the porous tile surface. The flange structure performs axial clamping to form axial positioning clamping. The invention can effectively improve the stability of the bearing, avoid the direct contact friction between the journal and the bearing surface, reduce the wear of the bearing bush, have better heat dissipation of the bearing, uniform temperature distribution of the bearing, smaller temperature rise, and ease the problem of thermal expansion.

The invention relates to a semi-rigid composite polyester net cage and an assembling process thereof. The semi-rigid composite polyester net cage comprises a net bag, which is composed of a side net and a bottom net, wherein the side net is formed by splicing a plurality of net pieces, which are formed by assembling a plurality of nettings, and the netting are woven from polyester threads. According to the semi-rigid composite polyester net cage, from the nettings to the net pieces then the side net, and then by means of the assembling structure and the assembling method of the side net and the bottom net, the overall strength of the net bag can be improved, the semi-rigid composite polyester net cage can resist windstorm and waves and avoid damage caused by tearing; meanwhile, an appliededge sealing manner can avoid direct contact and abrasion between the net bag and a net cage frame, thereby reducing wearing of the net bag and avoid loss brought about by release of the net bag.

The invention discloses a waterproof building structure. The waterproof building structure comprises a waterproof layer, an anti-damage layer, a fireproof layer, a soundproof layer and an elastic layer; the anti-damage layer is made of colored steel, the cross section of the anti-damage layer is in a U shape, and extending edges extending outwards are arranged on the two sides of the open end of the anti-damage layer; the interior of the anti-damage layer is of a hollow structure, and the fireproof layer, the soundproof layer and the elastic layer are sequentially arranged in the hollow structure of the anti-damage layer in a wrapped mode from outside to inside; the fireproof layer is made of rock wool board, the soundproof layer is made of a fiber board, and the elastic layer is made of asphalt; and fireproof cement gum layers are arranged on the side face, connected with two building wall bodies at a deformation seam, of the anti-damage layer, and the outer side of the anti-damage layer is wrapped with the waterproof layer. The waterproof building structure has the advantages of good waterproof performance and durability.

The invention relates to the field of nuclear reactors, and provides a hydraulic cylinder and a control rod hydraulic drive system. The hydraulic cylinder includes an outer casing and an inner casing. The inner chamber of the outer casing includes an upper chamber and a lower chamber communicating with the upper chamber. A stepped surface is formed between the upper chamber and the lower chamber, and a hydraulic ring groove is opened on the stepped surface. , the side wall of the outer casing is provided with a water inlet channel communicating with the hydraulic ring groove; the inner casing includes an upper casing located in the upper cavity and a lower casing located in the lower cavity, and the outer walls of the upper casing and the lower casing are provided with The first ring groove, the first ring groove is provided with an elastic support ring and a piston ring assembly sequentially along its radial direction from inside to outside, and the elastic support ring is used to drive the piston ring assembly part out of the first ring groove, so that the piston ring The assembly is in sliding and sealing engagement with the inner wall of the outer casing. The control rod hydraulic drive system includes a hydraulic cylinder. The invention utilizes the elastic support ring to realize the suspension support for the inner sleeve cylinder, avoids direct contact and friction between the inner sleeve cylinder and the outer sleeve cylinder, and prolongs the service life of the hydraulic cylinder.

The invention belongs to the technical field of pressure vessels, and particularly relates to a mini low-temperature LNG storage tank. The mini low-temperature LNG storage tank comprises a tank body,a supporting seat, a liquid outlet, a driving unit, a lifting unit and a starting and stopping unit, wherein the tank body is of a Y-shaped structure, the supporting seat is arranged at the bottom ofthe tank body, and the supporting seat is used for supporting the tank body; the liquid outlet is formed in the bottom of the side surface of the tank body, and the liquid outlet is used for filling or flowing out of low-temperature LNG; the lifting unit is arranged in the tank body, and the lifting unit is used for accelerating the low-temperature LNG flowing speed; the driving unit is arranged in the center of the supporting seat, and the driving unit is used for driving the lifting unit to move; and the starting and stopping unit is arranged between the lifting unit and the tank body, and the starting and stopping unit is used for starting and stopping the lifting unit. Through cooperation between the tank body, the supporting seat, the liquid outlet, the driving unit, the lifting unitand the starting and stopping unit, the low-temperature LNG flowing speed can be improved, the storage cost can be reduced, and LNG residues in the tank can be reduced.

The invention discloses a fire nozzle with a floor type bracket. The fire nozzle structurally comprises a fire nozzle connecting rod, a control switch, a handle, a connecting shaft, supporting legs and leg sleeves, and the control switch is installed on the fire nozzle connecting rod; the fire nozzle connecting rod is connected with the supporting legs through the connecting shaft, and the handleis mechanically connected with the surface of the fire nozzle connecting rod; the leg sleeves are arranged at the bottoms of the supporting legs in a sleeving mode; and the supporting legs penetrate through one end of a fixing device, and is provided with the leg sleeves. According to the fire nozzle, the leg sleeves are additionally arranged at the bottoms of the supporting legs, and ground attaching devices and pressure cavities are arranged in the leg sleeves; when the fire nozzle is placed on the ground, pressure rods arranged on the ground attaching devices are compressed and moved upwards vertically so as to extrude pressure in the pressure cavities to circulate in the direction of ground attaching strips; under the action of pressure, the ground attaching strips are taken out from the leg sleeves, and tightly fixed to the ground through fixing suckers arranged on the ground attaching strips; the ground attaching strips are arranged in a four-foot mode, and the stability of the supporting legs placed on the ground is comprehensively improved; and the whole fire nozzle is stably fixed to a position.