205results about How to "Avoid injury" patented technology

The invention relates to a fence, in particular to an aquaculture fence. In order to solve the technical problems, the aquaculture fence which can save time and is beneficial for screening is provided. The aquaculture fence comprises an installation plate, supporting columns, a guide plate, first connecting plates, a first baffle, a second baffle and the like, wherein the supporting columns are installed on the left side and the right side of the top of the installation plate respectively, the tops of the two supporting columns are connected with the guide plate, a first strip-shaped opening with a guiding effect is formed in the top of the guide plate, a second strip-shaped opening is formed in the rear side of the guide plate and communicated with the first strip-shaped opening, and thetwo first connecting plates are connected between the two supporting columns. Through the effect of the second baffle and the second baffle, fish fry small in size can be screened and does not need tobe fished up by people or screened by people with naked eyes, and therefore screening can be convenient and time can be saved.

The invention provides an external assembly type tower crane anti-climbing device, and belongs to the technical field of tower crane anti-climbing. Comprising a plurality of frames, a plurality of mounting plates are fixed to the side faces of the frames, the adjacent frames are perpendicularly arranged, the mounting plates between the adjacent frames are vertically aligned, and the vertically aligned mounting plates are fixedly connected through screws. By arranging the frame, the panel and the round rollers, when the tower body has a certain height and an entrance for entering a control room is located on the side face of the tower body, the fence composed of the frame and the panel is fixed to the periphery of the tower body, and when a person wants to climb the tower body, due to the fact that the surface of the panel is smooth and the feet of the person have no acting points, the person cannot climb the tower body, and the safety of the person is improved. When a person binds a hook on a rope and hangs the rope on the tower body, the person wants to climb the tower body with the help of the rope at the moment, and when the feet step on the panel, the round roller rotates, so that the feet of the person have no leveraging point, the person is further prevented from climbing the tower body, and safety protection for the person is achieved.

This utility model belongs to the field of product packaging quality inspection technology, and in particular relates to a product packaging compression resistance testing device, including a base for supporting the entire testing device, with anti-slip texture on its upper left surface; a controller including a central control module inside and a human-machine interface display module on its top outer wall, the human-machine interface display module being used to set compression resistance test parameters and display pressure values; and protective components, two sets of which are located on the upper left front of the base to prevent fragments from splashing. Positioning grooves are respectively formed inside the left end of the base and below the two sets of protective components. Four limiting rods are fixedly installed on the upper rear of the left end of the base, with a top plate fixed to the top of each limiting rod. This utility model can generate a change curve based on pressure values ​​and displacement, thereby facilitating the acquisition of more accurate packaging compression resistance test data, with high accuracy and reliability.

This utility model relates to the field of thick film heater technology and discloses a sealing structure for a thick film heater. In use, the external water supply pipe is first inserted into the inlet end and tightened via the connecting thread. The water supply pipe then compresses the sealing gasket, causing a telescopic spring to contract the gasket, thus separating the gasket from the sealing block. This allows water to flow into the thick film heater from the inlet end. The telescopic spring also pushes the sealing gasket against the end of the water supply pipe, improving the sealing effect and preventing water from flowing out through the gap between the water supply pipe and the inlet end. When the external water supply pipe ages and breaks and needs replacement, it can be removed. When the water supply pipe is removed, the telescopic spring causes the sealing gasket to reset, causing it to abut against the sealing block and seal the inlet end, preventing hot water from flowing out during replacement and causing injury. This improves the practicality of the sealing structure of the thick film heater.

The utility model discloses a hand warming bag, which comprises a cushion body, a heating element, a first heating element and a second heating element, and is characterized in that the cushion body is folded and bent to form a sleeve with a first accommodating space; the first locking structure is arranged on the cushion body and is used for keeping the shape of the sleeve; the heating sheet is arranged on the pad body or in the pad body so as to increase the temperature of the pad body or increase the temperature of the accommodating space; the electric control module is arranged on the pad body and is connected with the heating piece through a wire; the power supply circuit is connected with the electric control module, and a second containing space used for containing the power supply circuit and communicating with the external environment is formed in the pad body. And the power supply circuit is arranged in the second accommodating space. The power supply line is taken out from the second storage space when the power supply line needs to be used, and the power supply line is put back into the second storage space when the power supply line is used or needs to be stored. Damage caused by long-term leakage of the power supply line is avoided.

This invention discloses a muscle-relaxing and meridian-clearing health powder and its preparation and application methods, belonging to the technical field of traditional Chinese medicine external health care products. The health powder is composed of fifteen raw medicinal materials: safflower, angelica, asarum, kudzu root, red peony root, scutellaria, dragon's blood, saposhnikovia root, frankincense, myrrh, cinnamon twig, mugwort leaf, coptis root, *Lycopodium clavatum*, and *Clematis armandii*. These materials are dried, pulverized to 80-120 mesh, and then evenly mixed. This invention, through a unique formulation design, integrates multiple effects such as promoting blood circulation and removing blood stasis, dispelling wind and cold, relieving muscle tension and clearing meridians, and clearing heat and drying dampness. Combined with a refined pulverization process, it significantly improves the dissolution rate and transdermal absorption efficiency of the drugs. During use, a hot compress applied via steam allows the medicinal properties to directly reach the affected area, effectively relieving pain and discomfort in the neck, shoulders, waist, legs, and joints. This invention's product has a scientific formulation, advanced technology, is convenient to use, and highly safe, possessing broad market application prospects.

This invention provides a method and apparatus for disengaging electric power steering, relating to the field of vehicle control technology. The method includes: when determining that the current state of the vehicle meets the conditions for disengaging from automatic parking, acquiring the current rotation direction of the steering wheel, the current angular velocity, and the current hand torque direction of the driver; if the current angular velocity is greater than a safety threshold and the current hand torque direction is opposite to the current rotation direction, controlling the motor to output the magnitude of the reverse torque in a direction opposite to the current rotation direction of the steering wheel; if the current angular velocity is not greater than the safety threshold, or the current hand torque direction is the same as the current rotation direction, determining the target fusion coefficient of the current control cycle based on the fusion coefficient of the current control cycle and the fusion coefficient of the previous control cycle; and determining the target angle based on the target fusion coefficient, the current angle of the steering wheel, and the initial set angle in the automatic parking state.

The application relates to the technical field of jet mills, in particular to a jet mill for fine grinding of regenerated lithium iron phosphate coarse powder, which comprises a gas-powder separation tank, one end of the gas-powder separation tank is connected with a filter, the other end is connected with a crushing tank, a breather pipe is fixedly arranged on the crushing tank, the other end of the breather pipe is connected with an air compressor, a discharging cylinder is fixedly arranged on the breather pipe, support matching rod pieces are fixedly arranged on both ends of the cylinder mouth of the discharging cylinder in a symmetrical mode, a crushing cutter is arranged in the discharging cylinder, the crushing cutter can preliminarily crush the added materials when feeding, the crushed materials pass through a filter loading plate, enter the breather pipe and enter the crushing tank along with the airflow to be crushed, under the action of the crushing cutter, larger materials can be avoided from entering the crushing tank, the phenomenon of blockage of the crushing system is well avoided, and the working efficiency of the jet mill for crushing can be further improved after preliminary crushing, and the jet mill is very practical.

The utility model discloses an anti -topple's orthopedics nursing with walking aid relates to walking aid technical field, including walking aid main part, handle and auxiliary mechanism, the walking aid main part top both sides butt joint has handle, and walking aid main part bottom one side is equipped with pulley. This anti -topple's orthopedics nursing with walking aid uses, through the auxiliary mechanism and increase the contact area between walking aid main part and ground, and then promote the support effect between walking aid main part and ground, prevent the rolling friction between pulley and ground and cause the displacement of walking aid, and then prevent the displacement of walking aid and influence the gravity of patient when walking, prevent the patient from falling and being injured, and adjust the interval between walking aid main part, make walking aid main part internal space and the use habit of patient correspond, and then promote the comfort degree when walking aid uses, thereby when orthopedics nursing with walking aid uses, play the role of convenient adjustment interval and support anti -topple.

This utility model relates to the technical field of sanders, and more particularly to a cleaning structure for sanders. The protective mechanism includes an opening and closing assembly disposed on the top of the support plate, and a driving component is disposed on the top of the opening and closing assembly. The absorption mechanism includes a support assembly disposed on the top of the opening and closing assembly, and an absorption component is disposed on the top of the support assembly. Through the setting of the protective mechanism, a closed protective space can be formed during operation to prevent waste chips from splashing and injuring workers, and the sanding belt can be ensured to work normally through the extension hole. The absorption mechanism uses a support rod and a support block to fix the collection box and the dust pump. With the help of the dust suction holes on the main opening and closing plate and the secondary opening and closing plate, the waste chips generated by sanding are quickly sucked into the collection box under the action of the dust pump, realizing the immediate cleaning of waste chips, preventing accumulation from affecting the working accuracy, improving not only the working safety, but also the cleaning efficiency.

The application discloses a traction roller protection device and belongs to the field of carrier plate glass manufacturing and processing. The traction roller protection device comprises a traction roller main body, a workbench is arranged directly below the traction roller main body, one end of the traction roller main body is arranged on one side of the tabletop of the workbench, the other end of the traction roller main body is provided with a movable assembly and is connected with the other side of the tabletop of the workbench through the movable assembly, and a traction roller linear execution assembly is arranged at the inner bottom of the workbench and directly below the traction roller main body. The traction roller protection device can realize automatic removal of the broken glass, reduces the lifting time of the traction roller main body, guarantees the efficiency of the traction roller main body in traction of the carrier plate glass, avoids the injury of the workers and improves the safety of the whole device in use.

The invention belongs to the technical field of automobile maintenance equipment, particularly relates to a vehicle-mounted mobile automobile maintenance station and a use method thereof, and provides the following scheme aiming at the problems that existing maintenance instruments are difficult to carry, cannot normally carry out maintenance work in rainy and snowy weather and are easily affected with damp in a compartment. The device comprises a compartment fixedly installed on the top of an automobile hopper through bolts, a containing plate and a sliding plate are slidably connected into the compartment, the containing plate is located above the sliding plate, a plurality of pulleys are arranged at the bottom of the containing plate, and the pulleys make contact with the top of the sliding plate. Through cooperation of an L-shaped rotating turning plate and a rain baffle, a maintainer can conduct maintenance normally in rainy and snowy days, carrying of the jacking structure can be easily completed through a control structure, the maintenance efficiency of the maintainer is improved, the maintainer is prevented from being injured in the carrying process, and the maintenance cost is reduced. In addition, the jacking structure not only can jack the automobile, but also can be matched with the tire dismounting structure to dismount the tire.

The invention provides a display module and a display device. The display module comprises a display panel, a composite film located on the backlight side of the display panel, and a near field communication module located on the side, away from the display panel, of the composite film. The display panel comprises a central area and an edge area, and the edge area surrounds the central area; the composite film comprises a plurality of film layers, and the projection of at least one film layer in the composite film on the display panel is overlapped with at least part of the edge area; and at least one film layer with a conductive function in the composite film is electrically connected with the grounded flexible circuit board. Thus, electrostatic charges at the edge of the display module can be quickly led into the grounding end of the flexible circuit board through at least one film layer with a conductive function in the composite film, and the situation that static electricity breaks down the display panel or damages wires in the display panel, and consequently dark spots or abnormal display is caused is prevented.

This utility model discloses a popular science interactive display device. Key technical features include a display box with display windows on its periphery for observing the items inside. A vibration switch is installed on the inner side of the top cover of the display box. It also includes a sound module pre-stored with audio data, and the vibration switch controls the sound module to play the audio. This utility model allows the vibration switch to play pre-stored sounds of items by tapping the cover, combining auditory perception with physical interaction to enhance audience participation and exploration interest, and strengthen the immersive learning experience of scientific knowledge.

The invention discloses an advanced support device of an intelligent mining loader, which belongs to the technical field of mining equipment and comprises a chassis assembly, a loader shell is arranged at the top of the chassis assembly, an electric telescopic rod is arranged at the top of the loader shell, and support fixing equipment is arranged at the top of the electric telescopic rod. A support top plate is arranged at the top of the support fixing equipment; a sliding groove is formed in the supporting top plate, a movable supporting auxiliary top plate is movably connected into the sliding groove, and first racks are fixedly connected to the two sides of the movable supporting auxiliary top plate. Therefore, the upper portion of the driving assembly can be covered by the movable supporting auxiliary top plate, personnel injury and equipment damage caused by falling of broken stones at the top of a mine hole when the excavating assembly works are avoided, and the equipment is safer to use.

The utility model relates to the technical field of medical instruments, and discloses an orthopedic nursing circulation type cold compress device which comprises a movable base, a supporting plate is arranged above the movable base, a mounting frame is arranged at the upper end of the supporting plate, and an electric telescopic rod is arranged at the upper end of the mounting frame. An arc-shaped limiting plate is arranged at the driving end of the lower end of the electric telescopic rod. When the orthopedic nursing circulation type cold compress device is used, a patient can put an injured limb on a supporting plate, then an electric telescopic rod drives an arc-shaped limiting plate to move downwards, the limb is limited through the arc-shaped limiting plate, the fixing strength can be buffered through a silica gel pad, the limb is prevented from being injured, and then a circulation pump is started; cooling water in the cooling water tank is pumped out through the circulating pump and circulated through the circulating cooling branch pipe, so that cold compress is conducted on the limbs of the patient, the device is simple in structure and convenient to use, the comfort degree of the patient during cold compress can be improved, and the practicability of the orthopedic nursing circulating type cold compress device is improved.

This utility model discloses a raw material cleaning device for plastic particle production, including a cleaning device with a feeding hopper on the top left side. The front and rear sides of the bottom of the feeding hopper are fixedly connected to the top of the cleaning device. An antistatic mechanism is fixedly connected to the right side of the feeding hopper on the left side. The antistatic mechanism includes a pipe, with its left side fixedly connected to the right side of the feeding hopper. This utility model uses a dispersing component to disperse the raw material inside the feeding hopper, preventing it from adhering together. Then, the antistatic mechanism sprays the dispersed raw material to remove static electricity, preventing dust from adhering to the surface of the raw material due to static electricity. This raw material cleaning device for plastic particle production has the advantage of removing static electricity, improving the stability of the cleaning device, preventing the raw material from generating static electricity, avoiding the adsorption of dust and other impurities from the air, thus avoiding increasing the cleaning load on the cleaning device, and preventing electrostatic shock to the user.

The utility model relates to a glue bucket retreat prevention mechanism and glue bucket replacement device, glue bucket retreat prevention mechanism includes setting the mounting bracket of glue roller way one end and setting the glue bucket baffle of mounting bracket, the glue bucket baffle is rotatedly connected with mounting bracket through fixed pin, and the fixed pin is equipped with torsion spring with glue bucket baffle, the mounting bracket top surface does not protrude glue roller way, and the glue bucket baffle can rotate to the top surface not protruding mounting bracket when glue bucket is pushed to glue roller way through mounting bracket, rotates to the top surface protruding mounting bracket and glue roller way under the action of torsion spring when glue bucket leaves mounting bracket. Compared with prior art, the utility model has the advantages such as preventing material scrapping and personnel injury caused by glue bucket backward movement.

The utility model relates to a guardrail of an apartment dormitory bed, in particular to an easy-to-install guardrail of the apartment dormitory bed, which comprises a frame, a baffle plate is embedded in the frame, the edge of the baffle plate is provided with a folding edge, the baffle plate is installed on a bed frame and the frame through the folding edge, and the baffle plate is provided with a fan-shaped notch at the acute angle position enclosed by the bed frame and the frame; the arc edge of the fan-shaped notch is sleeved with an arc-shaped structure, the arc-shaped structure comprises a U-shaped groove arc plate matched with the arc edge, the section of the U-shaped groove arc plate is a U-shaped groove, the bottom surface of the U-shaped groove is provided with a grid reinforcing rib, the grid reinforcing rib comprises a plurality of rib plates, and the rib plates are spliced into grids distributed along the arc length of the U-shaped groove arc plate; the arc edge is sleeved with the first clamping groove, and the second clamping groove is clamped to the ends of the folded edges at the two ends of the arc edge. The fan-shaped notches are formed in the acute angles of the bevel edges of the baffles, so that mounting personnel can mount the baffles in the frame more quickly and conveniently; the arc-shaped structure is arranged at the edge of the fan-shaped notch, so that the edge is prevented from being deformed or damaged due to collision, and the edge hurts people.

The utility model relates to the technical field of toys for children, and discloses an environment-friendly bell toy capable of being grabbed safely, which comprises a ball cover and a splicing component, a plurality of notch grooves are arranged on the outer side of the ball cover, a bell is arranged on the inner side of the ball cover, a connecting rod is fixedly connected to the outer side of the ball cover, the splicing component is arranged in the connecting rod, and the splicing component is arranged on the inner side of the connecting rod. The splicing assembly is used for combining two toys together, and a protection assembly is arranged on the outer side of the connecting rod and used for enabling a child to safely grab the connecting rod; the protection assembly comprises a rubber sleeve. The connecting rod is sleeved with the rubber sleeve, the clamping groove is clamped with the clamping block, then the inner side of the connecting rod is tightly adhered by the adhesive ring, and the end of the rubber sleeve is slightly thinner than the limiting block and can be prevented from being stirred by a child, so that the rubber sleeve is stably installed on the outer side of the connecting rod, and the rubber sleeve has the buffering and protecting effects; and the children who grasp the rubber sleeve cannot be hurt, so that the safety of the bell toy is greatly improved.

The application relates to the field of balance training, and discloses a balance training method, device and system of a balance board and a computer readable storage medium. The balance training method of the balance board comprises the following steps: outputting an instruction instruction indicating that a trainer treads the balance board according to a plurality of different reference orientations; collecting a maximum inclination angle corresponding to each reference orientation; selecting a plurality of training tread directions and setting an inclination angle coefficient corresponding to each training tread direction; determining an angle threshold corresponding to each training tread direction according to the maximum inclination angle corresponding to each reference orientation, so as to determine a set inclination angle; and outputting a corresponding training prompt according to the training tread direction and the corresponding set inclination angle, so that the trainer performs balance training according to the training prompt. In the application, information about the tread ability of the trainer treading the balance board is obtained, so that the training target of the trainer is reasonably set, the effectiveness and rationality of the balance training are ensured, and the training effect and training experience are improved.

The utility model relates to the field of living beef cattle egg collection, and discloses a living cattle egg collection fixing frame which comprises a top frame and a bottom frame which are arranged in parallel, the top frame and the bottom frame are both of a hollow structure, a plurality of side pipes are fixedly connected to the two sides of the bottom end of the top frame and the two sides of the top end of the bottom frame respectively, and rotating rods are rotationally installed on the front sides of the top frame and the bottom frame respectively. The top ends and the bottom ends of the sides, close to each other, of the two rotating rods are fixedly connected with transverse rods correspondingly, a plurality of vertical pipes are arranged between the two transverse rods arranged in parallel in the vertical direction in parallel, a plurality of mounting bases are fixedly connected to the top end of one side of the top frame, and one side of each mounting base is rotationally connected with a connecting bent arm through a rotating shaft. Inclined plug pins distributed in the vertical direction are fixedly installed at the positions, close to the centers of the two rotating rods, of the connecting bent arms, plug bushes matched with the inclined plug pins in an inserted mode are fixedly installed on the outer side and the inner side of the top frame correspondingly, and adjusting assemblies are movably installed on the inner sides of the ends, close to each other, of the top frame and the bottom frame. By means of the structure, the cattle can be conveniently fixed in the process of collecting the eggs of the living cattle.

The utility model discloses a bending machine capable of storing blanking, which relates to the technical field of bending machines and comprises a machine body, a bending die, a sliding seat and a processing plate, and the bending die is mounted at the top end of the machine body. According to the bending machine capable of storing the fallen materials, a motor is started after machining is finished, so that a threaded rod connected with the output end can move a push plate through a displacement plate and a connecting rod, and the push plate can push a machined plate; then, after being arranged through a first guide rod and a second guide rod, the materials can be stored in a collecting frame, a pull ring is pulled, so that a connected protection plate can be moved out of the surface of a control button, and therefore the situation that constructors are injured in the operation process can be avoided; and meanwhile, the control button is shielded by the protection plate, so that a good mistaken touch prevention effect can be achieved during feeding, and the bending machine can be safer during use.

A mobility aid assembly for lifting and lowering a user; the assembly including an articulated lifting arm releasably mounted to a base structure; a first portion of the lifting arm operable between a lowered position and a raised position by a linear actuator; a first end of the linear actuator pivotally connected to the first portion of the lifting arm and, wherein a second end of the linear actuator is releasably mounted so as to avoid injury to the user if the linear actuator moves the first portion of the lifting arm to an excessively lowered position in which the first portion of the lifting impinges on the user. Also described is a method of changing disposition of fork elements of a fork of a disability aid assembly from a first position in which the fork elements are parallel to a horizontal centerline of the disability aid assembly and a second position in which outer ends of the fork elements are more widely separated than inner ends of the fork elements; the method including the steps of: - providing swivellable wheels at the outer ends of the fork elements with locking mechanisms, - locking each of the swivellable wheels at an angle in which the direction of the swivellable wheel is "toed out" relative to a centerline of the fork element, - moving the disability aid assembly in a forward direction to drive the fork elements from the first position into the second position, moving the disability aid assembly in a rearward direction to drive the fork element from the second position into the first position.

The utility model discloses a tubular centrifuge cavity, and relates to the technical field of centrifuge cavity separation equipment. The device comprises a supporting part and a supporting part, wherein the supporting part is used for supporting the device; the extraction part is mounted above the supporting part; the connecting part is arranged in the extraction part, and the connecting part is located on the left side of the supporting part; wherein the supporting part connects and supports the extraction part, the extraction part can separate the connecting part, the supporting part comprises a first supporting frame, the left side of the first supporting frame is fixedly connected with a second supporting frame, and the right side of the first supporting frame is fixedly connected with a third supporting frame. According to the utility model, the extraction part is arranged, so that the problems that the connection between the inner cavity and the rotary drum is relatively tight in the operation process, the operation is difficult in the separation process of the inner cavity and the rotary drum, a worker needs to spend a large amount of energy to separate the inner cavity and the rotary drum, the labor is wasted, and the worker is easily injured are solved.

The utility model relates to automatic laminating machine technical field, and disclose automatic laminating machine with cutting mechanism, including device side plate still include first fixed bolster and dust extraction mechanism, the bottom fixed connection of device side plate has the device bottom plate of support, be provided with dust extraction mechanism of dust removal on device side plate, device side plate is fixedly connected with first fixed bolster, first fixed bolster is fixedly connected with telescopic link body, one end of telescopic link body is fixedly connected with first connecting seat. Relative to the mode of manual collection, through the conveying pipe is collected and is transported to the first fixed shell place by the crushing wheel centralized processing, falls into the collection box centralized storage, instead of manual collection, avoids the worker to be injured when collecting and touching the cutting knife mistakenly, reduces the probability of industrial injury accident, breaks the processing of the excess film again through the crushing wheel, provides the convenience for the subsequent recovery treatment, greatly shortens the quickness of recovery treatment, improves the overall efficiency.

The utility model provides a suction cup fixing seat which comprises a main body, and a mounting position used for containing a suction cup is arranged on the back face of the main body. The main body is provided with a fixing part, an adsorption gland connected with the sucker is arranged in front of the main body, and a spring is arranged between the adsorption gland and the main body; the adsorption gland is provided with an early warning area, and when the adsorption gland is pressed downwards, the spring is compressed to store force. When the adsorption gland returns to the normal position from the pressing position, an exhaust state position, an adsorption state position and a decompression state position are sequentially formed, when the adsorption gland is located in the exhaust state position and the adsorption state position, the early warning area is shielded by the main body, and when the adsorption gland is located in the decompression state position, the early warning area is exposed. The utility model has the advantages of attractive appearance, convenience in adsorption, strong stability and no-pressure early warning function.

The utility model belongs to the technical field of digester, in particular to a glutinous sorghum digester, which comprises a steamer, a steaming cover and a plurality of layers of food steamers arranged between the steamer and the steaming cover, each food steamer consists of a steamer body and a grate, the grate is movably connected with the steamer body through a bearing, rotating handles are fixed at two ends of the grate, and the steaming cover is fixed on the steamer body. According to the food steamer, the food steamer does not need to be turned over, discharging can be achieved through simple operation of pulling the pull ring to relieve limiting and rotating the rotating handle, the labor intensity of operators is reduced, and the problems of personnel injury and material scattering possibly caused by turning over the food steamer are solved. The operation safety is improved, the working efficiency is improved, the tedious operation of turning over the steamer is reduced, the blanking time is saved, and the overall working efficiency of glutinous sorghum cooking processing is improved.

The application discloses a convenient tool for dismounting a position bolt of an incinerator grate oil cylinder base, which comprises a holding long rod, one end of the holding long rod is provided with a connecting rod block, one side of the connecting rod block is provided with a circular ring wrench, the other end of the holding long rod is provided with a connecting seat, the connecting seat is provided with an open wrench through a rotating assembly, and the connecting seat is further provided with a fixing adjusting mechanism matched with the rotating assembly. The application can effectively and tightly fix nuts installed at different positions in a narrow space, so that workers can conveniently dismount the bolts in the external space, thereby preventing the high temperature, the poor environment and the complicated mechanical components in the narrow space from scratching the body of the workers, avoiding the injury of the workers, and improving the work efficiency.