80results about How to "Prevent closure" patented technology

The invention discloses a pressure-controlled drainage gas production method and system for a coal-bed gas well. The pressure-controlled drainage gas production method comprises the steps that drainage is conducted through the first daily drainage amount, wherein the first daily drainage amount meets the eliminating demand for production interference objects in a coal bed; and a pressure-supplementing medium is injected while drainage is conducted, and the downhole flow pressure daily drop amount is maintained as a first differential pressure value so as to avoid retracting and closing of pores and cracks in the coal bed. According to the pressure-controlled drainage gas production method for the coal-bed gas well, the drainage speed at the drainage state can be conveniently determined, the eliminating demands for drilling and completion fluids, pulverized coal and slack coal in the coal bed can be met, and meanwhile, retracting and closing of the pores and the cracks in the coal bed can also be avoided; and compared with the prior art, the pressure-controlled drainage gas production method is simple in process, the production efficiency of the coal-bed gas well can be greatly improved, and quite high practical value and popularization value are achieved.

The invention discloses a method for fracturing a low-permeability coal seam by linkage of CO2 and high-pressure water, which comprises the following steps of: performing hydraulic fracturing to form a part of fractures, forming a weak acid environment by utilizing the characteristic that a CO2 medium is easily dissolved in high-pressure water in a high-pressure environment, and promoting chemical reaction between acid water and mineral components on the surfaces of the fractures under the driving of concentration gradient and high-pressure injection, the fractures are pressed by high-pressure water at the same time, so that cooperative work of high-pressure fracturing and CO2 acidification anti-reflection is achieved, and a complex fracture network is formed in the coal seam; after permeability increasing, the pressure is relieved, the normal pressure environment is recovered, at the moment, CO2 media dissolved in the high-pressure water in the layer penetrating drill holes are partially recovered to be in the gas state, CO2 gas and gas can form competitive adsorption in the coal seam, a large amount of gas is displaced and desorbed from the interior of the coal seam, in the whole process, the permeability increasing effect on the coal seam can be effectively achieved, and the coal seam permeability increasing effect is achieved. And no extra damage is caused to the coal seam, finally, on the premise that more energy is not consumed, effective transformation of the pore structure volume of the coal body is achieved to the maximum extent, and the gas extraction efficiency is improved.

The invention discloses a root canal filling needle head and a root canal filling device, the needle head comprises a needle tube and a handle body, the needle tube is provided with a far end and a near end connected with the handle body, the needle tube is provided with a flow channel penetrating through the far end and the near end, and the needle tube is provided with a guide reinforcing tube; the filling device comprises a pressure generator and the root canal filling needle, and the pressure generator provides positive pressure or negative pressure for the interior of the needle tube flow channel. The guide reinforcing tube is arranged on the needle tube to increase hardness, so that the needle tube can be inserted into the tail end of the bent root canal more smoothly; the root canal is vacuumized by utilizing the needle head, so that the whole root canal can be filled with a root canal sealing agent, and the probability of underfilling or overfilling is reduced; by arranging the pressure detection device, the pressure in the needle tube can be maintained at a set value through negative feedback adjustment, bubbles generated during root canal filling are effectively reduced, the needle tube is prevented from being blocked, and the filling effect is improved.

The invention discloses a method for manufacturing a rigid-flex printed circuit board with a crossed surface flexible layer, which comprises the following steps of: taking a double-sided flexible copper-clad plate, manufacturing a copper layer and an insulating medium layer on one surface of the double-sided flexible copper-clad plate to form a groove body, forming an etching and ablation groove, distributing the groove body corresponding to the edge of a flexible board area, attaching a cover film in the range of the groove body, and forming an upper flexible board and a lower flexible board, manufacturing a rigid core plate layer and prepregs, stacking and laminating to form a laminated plate, manufacturing an outer layer circuit pattern, and then forming to form the rigid-flexible combined plate; optionally, a windowing rigid core plate and a windowing prepreg are manufactured, one layer of flexible plate is stacked and pre-pressed to form a groove body structure, a release pad is arranged in the groove body, and the other layer of flexible plate is stacked and pressed to form a pressed plate; the etching and ablating groove is formed in the flexible plate, it is guaranteed that the problem that the flexible plate is difficult to mill during forming is solved, the mode that the release pad is arranged is selectively adopted to replace the mode that the flexible plate is broken off after depth-controlled milling, and the machining quality and precision of the plate body are effectively improved.

The utility model discloses a reliable circuit breaker remote control opening device in the field of circuit breakers, which comprises a circuit breaker body, a driving mechanism and a connecting mechanism, the driving mechanism is connected to the right side of the circuit breaker body, and the right side of a switch blade of the circuit breaker body is fixedly connected with a connecting rod. According to the reliable circuit breaker remote control opening device, starting of the driving motor is remotely controlled, the worm is made to rotate, the worm gear is driven to rotate, the deflection rod is made to deflect, the connecting rod is driven to deflect in the arc-shaped groove, a switch blade of the circuit breaker body is made to deflect, and therefore the circuit breaker body is opened. Similarly, when the driving motor rotates reversely, the connecting rod drives the knife switch to be closed, so that the circuit breaker can be conveniently opened and closed through remote control, the use safety of the device is improved, manual opening and closing are avoided, the use of the circuit breaker is more reliable, and safety accidents are reduced.

The fireproof valve with the electric auxiliary reset function comprises a fireproof valve body, an actuator and an auxiliary controller, the top of the fireproof valve body is connected with a mounting plate, the top of the mounting plate is connected with two sets of hanging rings, the two sides of the fireproof valve body are each provided with an air inlet and outlet connector, and the air inlet and outlet connectors are connected with the actuator. A driving blade and two sets of driven blades are arranged in the air inlet and outlet connector, the driving blade is located in the center of the air inlet and outlet connector, the two sets of driven blades are arranged on the upper side and the lower side of the driving blade correspondingly, and the actuator is connected to one side of the fireproof valve body. The auxiliary controller is connected to the side, away from the fireproof valve body, of the actuator, a pull ring is arranged below the actuator, a pull rope is connected between the actuator and the pull ring, after a fire behavior is over, the fireproof valve can be assisted to reset, the resetting process is safer and simpler, and when no fire behavior exists, the fireproof valve can be reset through the pull rope. And the fire damper is prevented from being closed due to misoperation.

The invention discloses a surgical incision suturing device, and relates to the technical field of medical instruments.The suturing device comprises a grip, a base, a closing mechanism, a firing mechanism and a propelling mechanism, an operator holds the suturing device through the grip, and after the operator aligns the suturing device to a surgical incision through the closing mechanism, the suturing device is sutured through the firing mechanism; one end of the closing mechanism is placed on a surgical incision, the suturing device and the surgical incision are kept horizontal through the closing mechanism, the surgical incision is accurately closed on an incision line through the triggering mechanism and the closing mechanism, it is ensured that tissue on the two sides of the surgical incision is evenly stressed, and after the surgical incision is closed, the closing mechanism stops working. The titanium nail sent by the firing mechanism penetrates through the skin tissue and is formed and fixed, the incision is prevented from being excessively closed, the stress of the incision is uniform, the surgical incision is sutured, and the next titanium nail is pushed to the position to be fired through the pushing mechanism to wait for next suturing.

The invention discloses a trachea guiding device and a guiding method of a trachea diagnosis and treatment instrument. The trachea guiding device comprises a flexible catheter and an outer sleeve arranged on the flexible catheter in a sleeving mode, and a deformable bifurcated catheter is arranged in the middle section of the flexible catheter; and the bifurcated catheter is inclined and diverged outwards without external force, and deforms and is folded towards the flexible catheter side under the action of the outer sleeve. The front end of the flexible catheter is provided with a conical guide-in part facilitating guide-in, the rear end of the flexible catheter is provided with a first end cap facilitating hand holding, and the flexible catheter is sleeved with the first end cap. A second end cap is arranged at the end, close to the first end cap, of the sleeve. The problems that an existing trachea operation and trachea diagnosis and treatment instrument cannot enter the trachea conveniently, and the operation difficulty is large are solved, and the device can be widely applied to the technical field of medical instruments.

The ICU nursing sputum aspirator comprises an oral cavity opening device, a rear neck supporting device and a mechanical sputum suction structure, the oral cavity opening device is placed in the oral cavity of a patient and used for supporting the oral cavity of the patient, the patient is prevented from being closed in the sputum suction process, the rear neck supporting device makes contact with the rear neck of the patient, and the mechanical sputum suction structure is arranged on the rear neck of the patient. The oral cavity distraction device supports the rear neck of the patient, the head of the patient leans backwards, the laryngeal cavity of the patient is opened, and the mechanical sputum suction structure is fixedly connected with the oral cavity distraction device through a support and used for extracting sputum in the throat of the patient. The invention belongs to the technical field of ICU nursing equipment. In order to solve the problems that in the existing sputum suction process, the oral cavity of a patient is unconsciously closed, and sputum suction equipment is large in structure and inconvenient to operate, the ICU nursing sputum suction apparatus is provided, the oral cavity of the patient can be in a continuous opening state, and the sputum suction equipment is small, easy to store and easy to operate. And an effective sputum suction means can be provided for a patient in an emergency.

The utility model discloses a novel flat valve, which relates to the technical field of valves and comprises a mounting frame and a flashboard, a material cavity and a movable cavity are arranged on the mounting frame, and two groups of rollers for supporting the flashboard are symmetrically arranged on two sides of the material cavity and the movable cavity to reduce resistance in the operation process of a valve plate; a driving assembly is arranged on the mounting frame, and is connected with the flashboard so that the flashboard is connected into the material cavity or the movable cavity; the front end of the material cavity is provided with a receiving opening matched with the flashboard in size so that the front end of the flashboard can be connected into the receiving opening when the flashboard blocks the material cavity. According to the device, the design of a traditional groove is abandoned and replaced by the idler wheels, so that the flashboard is smoother during operation, and accumulated materials are reduced; moreover, due to the design of the receiving opening, the front end of the flashboard does not need to be in contact with the inner wall of the material cavity when the flashboard is closed, but directly extends into the receiving opening, so that the closing problem of the flashboard is effectively avoided.

The embodiment of the application provides a handle structure and equipment, and relates to the field of communication equipment. The handle structure comprises at least one handle base, the handle base is used for being connected with the equipment; a handle, the handle is rotationally connected with the handle base, and the handle is provided with a buffer; a damping member, the damping member is arranged on one side of the handle base and located between the handle and the handle base; the damping member is configured to rotate the handle relative to the handle base, the buffer moves relative to the handle base, and the damping member provides rotation damping for the handle when switching between the closed position or the open position. The handle can be rotated to the position (such as the closed position) of being attached to the shell of the equipment, so that the occupied space in the non-use state is reduced. The damping member provides rotation damping for the rotation of the handle, plays a buffering and hovering role, and reduces noise and impact.

The invention relates to the technical field of charging management, and provides an AC charging pile relay protection control method, a charging pile and a storage medium. The control method comprises the steps that under the condition that it is monitored that the charging pile is switched from a charging state to a preparation state, a main relay of the charging pile is controlled to be cut off, and under the condition that a charging gun is not pulled out of a target vehicle, waiting time is started to be calculated; and when it is monitored that the working state of the charging pile is switched from the preparation state to the charging state and the waiting duration which does not reach the first duration threshold exists, the main relay is not controlled to be closed. By adopting the technical scheme, whether the main relay is controlled to be closed or not can be determined on the basis of whether the duration of switching the charging pile from the charging state to the preparation state last time reaches the first duration threshold value or not under the condition that the working state of the charging pile is monitored to be switched from the preparation state to the charging state; in this way, frequent switching-off and switching-on of the main relay can be avoided, and then relay damage to the charging pile can be avoided.

The invention relates to the technical field of aging tests, and discloses a notebook computer aging test conveying line which comprises a rack, a pair of conveying parts arranged in parallel, a conveying part arranged on the rack and located on the upper side and used for conveying a to-be-aged computer to a set position, and a conveying part arranged on the lower side of the rack and used for conveying the to-be-aged computer to the set position. The conveying part located on the lower side is used for conveying the aged computer to the next procedure, and the conveying directions of the conveying part and the conveying part are opposite. The technical means that the moving part and the stress part are matched is adopted, after the notebook computer is transported to a set position, the moving part drives the lifting part to open the upper shell of the notebook computer to be aged by a set angle relative to the lower shell, and meanwhile the moving part also drives the pressing part to close the upper shell of the aged notebook computer relative to the lower shell; the working efficiency is improved, meanwhile, the adverse effect of jolting of a conveying line on the rotating shaft of the notebook computer is reduced, the defects in the prior art are overcome, and the practicability of the device is improved.

The invention relates to the technical field of indoor evaluation systems and evaluation methods of a fracturing transformation technology, and discloses a supercritical CO2 fracturing fluid in-situ rheology and visual crack sand-carrying experiment system and method. The experimental system comprises a supercritical CO2 high-pressure phase balance unit, a high-pressure capillary viscosity testing unit, a high-pressure visual dynamic sand-carrying testing unit and a data acquisition and analysis unit. The experimental method comprises capillary viscosity testing and dynamic sand-carrying performance testing. According to the scheme, the sand-carrying experiment and the viscosity experiment are combined, the sand-carrying experiment is used for testing the migration conditions of the supercritical CO2 fracturing fluid obtained by different formulas under different simulated temperatures and pressures, and the viscosity experiment is used for testing the viscosity of the supercritical CO2 fracturing fluid obtained by different formulas, evaluating the friction resistance of the supercritical CO2 fracturing fluid and optimizing the rheological property of the fracturing fluid, so that the friction resistance is reduced, and the fracturing efficiency is improved. Energy consumption is reduced, and operation efficiency is improved.

The invention belongs to the technical field of oil and gas development, and particularly relates to a microbubble solid acid slow-release fracturing device and a using method thereof.The microbubble solid acid slow-release fracturing device comprises an acid liquid tank, the output end of the acid liquid tank is in through connection with one end of a first conveying pipe, the other end of the first conveying pipe is in through connection with the input end of a low-pressure manifold, and a liquid supply pump is arranged on the first conveying pipe; the output end of the low-pressure manifold is connected with one end of a second conveying pipe in a penetrating mode, the other end of the second conveying pipe is connected with the input end of a fracturing truck in a penetrating mode, the output end of the fracturing truck is connected with one end of a third conveying pipe in a penetrating mode, and the other end of the third conveying pipe is connected with the input end of the high-pressure manifold in a penetrating mode. The mixed solution is subjected to foam particle size refining through the high-pressure micro-foam generator, the stability of foam can be remarkably improved, the stable foam can keep the form in a high-pressure environment and is not prone to breakage, and therefore the pressure bearing capacity of the fracturing fluid is enhanced.

This utility model discloses a four-part mold, relating to the field of mold technology. It includes a base, a bottom mold on top of the base, a top mold on top of the bottom mold, a limiting component between the bottom mold and the top mold, and a feeding component on top of the top mold. The limiting component includes a limiting shaft, which is located on one side of the top mold. During injection molding, the raw material is smoothly conveyed from the injection port to the feeding port, then sequentially enters the distributor, passes through the conveying pipe to the discharge port, and is finally precisely delivered into the four different cavities of the inner mold for forming. This ingenious design using a four-part mold, compared to a single-part mold, can more evenly distribute the ejection force during the ejection process after product molding, effectively reducing damage to the product caused by the ejection operation, improving product qualification rate, reducing production costs, and enhancing production efficiency and product quality stability.

The utility model discloses an oral cavity examination dilator, which relates to the technical field of oral cavity examination, and comprises two tooth fixing plates used for supporting the mouth of a patient, a positioning assembly used for positioning the dilator is arranged between the two tooth fixing plates, the positioning assembly comprises mounting plates and a guide pipe, the same sides of the two tooth fixing plates are elastically provided with the mounting plates, and the guide pipe is arranged on the mounting plates. The guide pipe is arranged between the two mounting plates, and one end of the guide pipe is fixedly connected with one side of one mounting plate. Compressed air is conveyed into an inner cavity of a guide pipe through a positioning assembly and an air conveying pipe, the air pressure between a sealing plug and the bottom of the guide pipe is increased, then a supporting rod is pushed to slide in the direction away from the guide pipe, and after the two tooth fixing plates move to a certain degree, the purpose of positioning the two tooth fixing plates can be achieved by closing an air pump; the mouth of the patient is prevented from being closed due to soreness or fatigue of muscles around the mouth of the patient, and adverse effects on normal examination of the oral cavity of the patient are reduced.

The invention relates to the technical field of access control equipment, in particular to novel access control equipment for a powder bin of a mixing station, which comprises a door body, the door body is an inlet of the powder bin, a lock catch is arranged on one side of the door body, infrared sensors are arranged on one side of the door body above and below the lock catch, and whether an object completely passes through the door body or not is detected through the infrared sensors; anti-pinch holes are formed in one side of the top and one side of the bottom of the door body, the conveying table is arranged in front of the door body, a conveying channel is formed in the top of the conveying table, and the conveying channel is used for guiding and supporting the transportation equipment to move to the door body along a preset path. The material feature information is captured through the laser scanner and compared with the preset data in the database for analysis, it is ensured that only correct materials can enter the designated stock bin, real-time accurate recognition of the materials entering the access control area is achieved, and the risk of mistaken feeding and confusion of the materials is effectively avoided.

The invention provides an end cover assembly, an energy storage device and a power utilization system. The end cover assembly comprises a top cover, the top cover is provided with a first surface and a second surface which are oppositely arranged, the top cover is provided with an anti-explosion hole, and the anti-explosion hole penetrates through the first surface and the second surface; the explosion-proof assembly is arranged on the top cover and seals the explosion-proof hole; the lower plastic cement is arranged on the second surface side of the top cover, the lower plastic cement comprises a plastic cement part, a fence part and a boss, the plastic cement part is connected with the fence part, and the orthographic projection of the fence part on the second surface at least covers part of the explosion-proof hole; the fence part is provided with an open hole and a first exhaust hole, the open hole is closer to the plastic part than the first exhaust hole, the open hole is communicated with a space between the explosion-proof assembly and the fence part and a space of one side, deviating from the top cover, of the lower plastic part, and the first exhaust hole is communicated with a space between the explosion-proof assembly and the fence part and a space of one side, deviating from the top cover, of the lower plastic part; the boss is convexly arranged on the surface, deviating from the top cover, of the plastic part and connected with the fence part.

The utility model relates to a device for fixing a tree shrew in visual intervention and examination operation of an ophthalmic experiment, and belongs to the technical field of animal experiment research instruments. The bottom of one end of a head fixer is provided with an opening, and the other end of the head fixer is connected with a trunk fixer which is communicated with the head fixer; a space defined by the head fixator and the trunk fixator is an operation area, gas exchange channels are distributed in the head fixator, and eye exposure channels, first fixing rope preformed holes, second fixing rope preformed holes and third fixing rope preformed holes are distributed in the trunk fixator. The tree shrew fixing device has the advantages that the tree shrew can be firmly fixed through the rope or the binding belt and the trunk fixing device part, the fixing effect is further enhanced through a full-surrounding structure, and the situation that the tree shrew escapes due to unforeseen circumstances is prevented. Manual grabbing is replaced, experimenters are prevented from being scratched or bitten, and in addition, the stability of the head is guaranteed for the problem that the head of the tree shrew shakes.

This utility model discloses an automatic sprinkler curing device for cap beams, relating to the field of cap beam construction technology. It includes a bottom support clamp, a support frame, and a sprinkler module. The sprinkler module is connected to an automatic water supply module. The bottom support clamp is clamped to the outer surface of the upright support column. The support frame is M-shaped, with a first slot and a second slot for respectively securing two upright support columns. Two first clamping rods are provided and respectively installed and fixed in the first and second slots. Two second clamping rods are provided and respectively detachably installed at the opening positions of the first and second slots. This utility model utilizes the bottom support clamp to install the support frame and sprinkler module under the cap beam. The automatic water supply module intermittently supplies water to the sprinkler module, achieving intermittent automatic sprinkler spraying and improving the degree of automation. The support frame and sprinkler module can be inserted horizontally directly below the cap beam rather than diagonally below, thereby achieving comprehensive sprinkler spraying of the cap beam's bottom surface and avoiding sprinkler dead zones.

The present invention relates to a cardiopulmonary cerebral resuscitation device, the structure of which includes a back plate, a support adjustment frame installed on the back plate, a breathing arm and a circulation arm installed on the support adjustment frame, and an ice cap placed on the device. The cardiopulmonary cerebral resuscitation device has three major functions, namely chest compression, breathing support and hypothermic brain protection. The circulation arm is used for performing cardiac compression to achieve cardiac resuscitation, the breathing arm is used for ventilating the lungs to achieve pulmonary resuscitation, and the ice cap is used for cooling the brain to achieve brain protection. The three parts are used in combination, and with or without power supply and with or without air source conditions, appropriate chest compression, lung ventilation and brain cooling protection can be performed on patients, so that patients can resume oxygen supply and reduce the oxygen demand of the brain, reduce or even avoid damage caused by hypoxia, and maximize the survival rate of patients with cardiac arrest.

The embodiment of the present application provides a kind of voltage transformer secondary circuit protection control method and device, the method comprises: the current data of voltage transformer secondary circuit is collected in real time;The first judgment is carried out to the current data, and first judgment result is obtained;When first judgment result is characterized by passing, the second judgment is carried out to the current data, and second judgment result is obtained;When the second judgment result is characterized by passing, accumulated sampling data is cleared;The first judgment, second judgment are used to judge whether the voltage transformer secondary circuit generates different current fault.The voltage transformer secondary circuit protection control method in the embodiment of the present application can effectively protect voltage transformer secondary circuit, and maintenance efficiency is improved.

The utility model relates to the field of medical instruments, in particular to an oropharynx breather pipe which comprises a flange, a bite block part and a pharynx bending part which are connected in sequence, a vent hole communicated with the bite block part is formed in the flange, the bite block part is made of soft materials, a bite block inner core extending into the bite block part is inserted into the vent hole, and the bite block inner core is made of soft materials. The bite block inner core can be taken out from the vent hole and is made of a hard material. According to the dental pad, the problem that the dental pad part is hard and cannot be suitable for old edentulous patients is solved.

The utility model relates to the field of oral examination, and discloses oral examination auxiliary equipment which comprises a handle, a movable rod, an arc-shaped rod, an odontoscope, a pinching handle, a lantern ring and a tooth supporting mechanism, a cavity is formed in the handle, through holes are formed in the left inner wall and the right inner wall of the cavity, and the movable rod is arranged in the cavity. Compared with the prior art, the oral cavity examination device has the following advantages and effects that when the mouth of a patient is opened to examine the oral cavity, part of upper teeth of the patient bite on the upper tooth cushion, part of lower teeth of the patient bite on the lower tooth cushion, the patient can be effectively prevented from closing the mouth unconsciously, and the fatigue feeling caused by long-time opening of the mouth of the patient can be reduced; furthermore, the distance between the lower tooth cushion and the upper tooth cushion can be conveniently adjusted and changed, the opening degree of the mouth of the patient can be changed, the opening degree of the mouth of the patient can be kept appropriate, and the doctor can conveniently check the oral cavity of the patient.

The invention relates to the technical field of automobile pipe fitting detection, in particular to detection equipment for new energy automobile pipe fitting production, which comprises a mounting frame, a detection barrel, a power unit I and the like, the mounting frame is connected with a detection barrel; a first power unit is connected to the mounting frame. After the hose is immersed in water in the detection barrel, the spherical parts of the two abutting rods abut against the inner wall of the hose, pressure is applied to the inner wall of the hose, the hose is expanded, tiny cracks in the inner wall of the hose are temporarily expanded, therefore, gas is conveniently discharged from the hose, bubbles are generated, the detection efficiency is improved, and meanwhile, the detection accuracy is improved. Pressure is applied to the inner wall of the hose through the spherical portion of the abutting rod, fine cracks in the inner wall of the hose are temporarily expanded, the amount of gas entering water can be conveniently increased, a large number of bubbles can be conveniently generated, observation by workers or a camera instrument is facilitated, and the situation that false detection is easily caused due to the fact that the cracks are fine and the bubbles are not clearly generated is avoided.

The utility model relates to a pipeline arrangement device for nursing. The pipeline arrangement device comprises a support; the mounting seat is connected with the bracket; the long-strip-shaped connecting frames are arranged at the bottom of the mounting base side by side; the pipeline fixing clamp is mounted on the connecting frame in a sliding manner and is used for fixing and arranging pipelines; and the pipeline winding assembly is mounted at one end of the connecting frame and is used for winding the pipeline. Compared with the prior art, the pipeline arrangement device has the advantages that numerous pipelines are effectively arranged, redundant pipelines are wound and wound in order, the anti-slipping performance of the pipelines is improved, the pipeline arrangement efficiency is improved, and the operation and management difficulty of medical staff is reduced.

The utility model discloses a kind of self-adapting elastic waist support mechanism and seat, including pedestal and waist support, elastic member is equipped between pedestal and waist support, elastic member can force waist support always have forward trend;Self-adapting guide structure is equipped between pedestal and waist support, self-adapting guide structure includes the sleeve portion set on one of pedestal and waist support, the sliding fit portion set on the other of pedestal and waist support, the inner hole of sleeve portion is the guide hole extending front and back;Sliding fit portion is inserted in guide hole and forms front and back sliding connection with sleeve portion;By leaving gap between sliding fit portion and sleeve portion, provide certain self-adapting adjustment space for sliding fit portion in guide hole, so that waist support can be deflected after being stressed, and smoothly slide back after deflection, avoid sliding fit portion to form larger extrusion force to guide hole inner wall, reduce the risk of jam when waist support slides, improve the use experience of seat.

The utility model relates to a tree insect-preventing agent spraying device for municipal gardens, which comprises a pesticide box for storing insect-preventing agents, and the pesticide box is arranged on a vehicle body; a supporting frame is installed on the side wall of the pesticide box, the supporting frame is connected to the pesticide box in a lifting mode, an adjusting frame is installed on the supporting frame, a plurality of spray heads are installed on the adjusting frame, the spray heads communicate with the side wall of the pesticide box through telescopic connecting pipelines, and the connecting pipelines are contained in the supporting frame; the adjusting frame is driven by an adjusting device to move relative to the supporting frame. The vehicle body is adopted for moving, and the pesticide box with the large weight and the high height can be borne; the multiple nozzles are supported by the supporting frame, spraying can be conducted without manual holding, meanwhile, the spraying range of the nozzles is expanded through lifting of the supporting frame and movement of the adjusting frame relative to the supporting frame, and the spraying device is more practical.

The utility model relates to the technical field of oil tank, put forward a kind of main oil tank oil level alarm device, the design includes oil tank body, oil tank body upper portion is provided with cover plate subassembly, cover plate subassembly includes the cover plate body of buckling in the upper portion of oil tank body, cover plate subassembly still includes the cross post of fixedly connected in the bottom of cover plate body, cross post outside is provided with oil level monitoring subassembly, oil level monitoring subassembly includes the lower tray of limit sliding in the outside of cross post, the outside of oil tank body is still provided with the alarm component that can cooperate with oil level monitoring subassembly to the oil level height detection and alarm of oil tank body;The design is through cross direction + magnetic attraction sealing design, solved the problem that oil tank float guiding stability is insufficient and sealing is insufficient in the prior art.