28results about How to "Improve reset effect" patented technology

The one-way valve comprises a shell, the shell is provided with a hollow water flow channel, a water outlet and a water inlet, the water outlet and the water inlet are communicated with the water flow channel, the one-way valve further comprises a diaphragm structure arranged at the water inlet, the diaphragm structure comprises a rubber head structure, the rubber head structure is arranged in the center of the diaphragm structure and used for forming a sealing face for the water inlet, and the rubber head structure is arranged in the middle of the diaphragm structure. Water flow is prevented from flowing out from the water inlet; the overflowing through holes are uniformly distributed on the outer ring of the rubber head structure in a surrounding manner and are used for water flow to pass through; the sealing structure is arranged on the outer periphery of the diaphragm structure and used for preventing water flow from leaking from the joint of the diaphragm structure and the inner wall of the shell. According to the utility model, the rubber head structure and the sealing structure are arranged together through the diaphragm structure, so that the sealing surface formed by the rubber head structure to the water inlet is always in the central position, the rubber head structure has a good resetting effect, the position deviation of the sealing surface caused by repeated use is avoided, the sealing effect is ensured, and meanwhile, the diaphragm structure is convenient to install.

A continuous coating machine includes a frame, a coating cylinder rotating at the upper end of the frame, and a spray gun located in the coating cylinder, and also includes: a support mechanism located at the center of the lower end of the frame, the lower end of the frame is hinged to the support mechanism; a lifting mechanism installed below the frame and located at the feeding end of the coating cylinder, which can drive the frame to move up and reset; a reset mechanism installed below the frame and located at the discharging end of the coating cylinder, which can drive the frame to move down and reset, the lifting mechanism and the reset mechanism are linked and cooperate with the support mechanism to make the frame swing toward the discharging end of the coating cylinder, and the upward movement distance of the lifting mechanism is less than the downward movement distance of the reset mechanism. The present invention realizes the rapid adjustment of the frame to tilt toward the discharging end of the coating cylinder by linking the lifting mechanism and the reset mechanism and driving the synchronous same-direction swing, and realizes the continuity of coating in this way, which is more convenient.

The utility model relates to the technical field of bridge supports, in particular to a bridge support. Comprising an upper bridge, a support is installed in the upper bridge, a lower bridge is installed at the lower end of the support, a sealing ring is fixedly connected between the lower bridge and the support, the sealing ring is a rubber sealing gasket, an arc-shaped groove is formed in the lower bridge, an arc-shaped plate is fixedly connected to the lower end of the support, and the arc-shaped plate and the arc-shaped groove are arranged in a sliding mode. When the bridge is stressed to enable the arc-shaped plate to slide in the arc-shaped groove, lubricating grease in contact with the arc-shaped plate can be smeared in the arc-shaped groove along with sliding of the arc-shaped plate, and in the lubricating groove shielded by the arc-shaped plate, the pushing spring is reset to push the pushing plate to push the lubricating grease out of the arc-shaped groove, so that when the support is subjected to large force to drive the arc-shaped plate to move greatly, the lubricating grease is smeared in the arc-shaped groove. According to the bridge support, more lubricating grease can be extruded out to lubricate the bridge, the device can carry out different responses under different stress conditions of the bridge, the endurance effect of the lubricating grease during use of the support is improved by controlling the output amount of the lubricating grease, and therefore abrasion of the support is reduced.

The utility model discloses a fly ash raw material bin feed opening anti-blocking dredging device which comprises a raw material bin body, the lower portion of the raw material bin body is communicated with a discharge opening, the lower portion of the discharge opening is fixedly connected with a driving mechanism, a material pushing mechanism is arranged in the driving mechanism, and the surface of the material pushing mechanism is sleeved with a guiding mechanism. According to the utility model, the driving shaft can drive the pushing cam to rotate through the driving motor, so that the driving plate can conveniently drive the pushing rod and the material stirring rod to reciprocate up and down in the discharge port, and therefore, in the discharge process of the discharge port, the material blockage can be reduced by pushing materials in the discharge port; the driving plate can be guided through the guide rollers installed on the periphery of the driving plate, abrasion of the driving plate is reduced, meanwhile, the pushing rod can be guided through the guide disc, and the driving plate can be conveniently pushed to reset in an auxiliary mode through the elastic force of the reset spring.

The invention relates to a micro photosensitive surface avalanche transistor center alignment device and a correction method thereof. The device comprises a pipe pressing ring 1, a pipe sleeve 2, a pipe pressing ring 3, a group pressing ring 4, an adjusting screw 5, an avalanche transistor 6, a matched universal tool microscope 7 and a matched screwdriver 8. During correction, a universal tool microscope 7 is used for reading the relative coordinates of the outer edge of the tube pressing ring 3 and the center of the photosensitive surface of the avalanche tube, the four adjusting screws 5 are adjusted up, down, left and right after the relative position of the tube pressing ring 3 and the center of the photosensitive surface of the avalanche tube is calculated, and the adjusting screws 5 are used for pushing the tube sleeve 2 and the avalanche tube 6 to move until the coaxiality of the center of the photosensitive surface of the avalanche tube and the outer edge of the tube pressing ring 3 is smaller than 0.03 mm. Therefore, the aim of alignment is fulfilled. The device is mainly used for center calibration of the avalanche transistor with the photosensitive surface diameter not larger than 0.2 mm, has the advantages of being simple in structure, efficient in reset, accurate, stable and the like, and can be applied to occasions with high precision, high speed, high reliability and the like.

The utility model belongs to the technical field of abdominal wheel structures for fitness, in particular to a silent wheel body of an abdominal wheel, which comprises a wheel body, a rotating shaft penetrates through the middle of the wheel body and is rotatably connected with the wheel body, and a spring is arranged between the rotating shaft and the wheel body. The spring is located in the wheel body, one end of the spring is fixed to the wheel body, and the other end of the spring is fixed to the rotating shaft. The spring is formed by transversely surrounding a metal wire, and a spring ring of the spring is arranged between the wheel body and the rotating shaft in a suspended mode. A sleeve is arranged on the side edge of the wheel body and extends into one end of the spring. A gap is formed between the spring and the sleeve, the wheel body rotates so that the spring can retract inwards, and the spring can abut against the outer side wall of the sleeve after deformation. Or no gap exists between the spring and the sleeve, and the spring abuts against the outer side of the sleeve; the sleeve is provided with a plurality of longitudinal notches, and under the action of the longitudinal notches, the sleeve has elasticity and can deform inwards. The utility model provides an abdominal wheel body which is simple in structure and mute.

The utility model discloses a probe tube dismounting tool, which comprises a first clamping piece, a second clamping piece, a third clamping piece, a fourth clamping piece and a fourth clamping piece, and is characterized in that the first clamping piece is provided with a first probe clamping part; the first clamping piece is provided with a first probe clamping part, the second clamping piece is provided with a second probe clamping part, one end of the first clamping piece is rotationally connected with one end of the second clamping piece, and the first probe clamping part and the second probe clamping part are oppositely arranged; and the resetting piece is arranged between the first clamping piece and the second clamping piece and is used for resetting the distance between the first clamping piece and the second clamping piece. According to the utility model, the reset piece is adopted, so that the tool can still keep a better reset effect after being used for many times, the performance reduction caused by material fatigue and abrasion is avoided, the requirement of manual intervention is reduced, and the disassembly efficiency is improved; and the tool is not easy to break due to the rotary connection structure when bearing large gripping force, so that the reliability and the safety of the tool are improved.

The utility model relates to the technical field of cable equipment, and discloses a transverse bridge cable compensation device, which comprises a connecting block and a fixing plate, the surface of the connecting block is provided with a fixing structure, the fixing structure comprises a fixing rod, the fixing rod is connected with the surface of the connecting block, the surface of the fixing rod is connected with a long strip plate, the surface of the long strip plate is provided with a sliding chute, and the sliding chute is connected with the connecting block. The inner wall of the sliding groove is in threaded connection with a two-way screw, the inner wall of the sliding groove is slidably connected with a sliding block, the sliding block is slidably connected with the arc face of the two-way screw, and the surface of the sliding block is connected with a clamping block. The inner walls of the clamping blocks are connected with cushions, the sizes of the cushions are matched with the sizes of the clamping blocks, and the cushions are made of rubber materials. According to the paint storage device, the problems that when the discharging opening is sealed through the barrel plug, a gap exists between the barrel plug and the discharging opening during installation, so that the air tightness of the interior of the storage device is poor, the storage effect of paint is affected after a long time, and the use cost of a user is improved are solved.

The invention relates to a hanging type rocker arm mechanism of a charging pile, and aims to solve the technical problems that existing similar products are inconvenient to use, and particularly the similar products are lack of reset structures and positioning structures. The rocker arm mechanism comprises a base and a take-up device, a rotating shaft of the take-up device is driven by a coil spring transmission assembly and a ratchet wheel braking assembly of the base below the rotating shaft to freely swing and reset, a wiring harness in the take-up device extends out through a pipe fitting with one side serving as a rocker arm for use, and the rocker arm and the take-up device are connected into a whole. According to the key points, a coil spring transmission assembly is arranged in a lower fixing seat of the base, a ratchet wheel braking assembly is arranged in an upper fixing seat at the top of the lower fixing seat, the rotating shaft is sequentially connected with a driving gear of the coil spring transmission assembly, a ratchet wheel of the ratchet wheel braking assembly and a rocker arm on one side of the take-up device at the same time, and a nut is arranged at one end of the rotating shaft at the joint. A square head at the other end of the rotating shaft is fixed to a square hole in the center of the driving gear, and the lower fixing base and the upper fixing base are connected into a whole through a screw on one side of the top of the upper fixing base.

The utility model provides a kind of automatic cap screwing machine, including barrel conveying mechanism, cover body conveying mechanism and cap screwing mechanism;The barrel conveying mechanism is used to sequentially convey the barrel to the tightening station, loosening station stably according to specific orientation;The cover body conveying mechanism is used to stably convey the cover body to the tightening station according to specific orientation;The cap screwing mechanism includes tightening assembly and loosening assembly;The tightening assembly is arranged at the tightening station, can clamp the cover body, and the cover body is moved to the thread part at the barrel opening and is tightened action;The loosening assembly is arranged at the loosening station, can clamp the cover body on the barrel, and the cover body is loosened in reverse at a certain angle;The step of improving cap screwing is increased slightly loosening the cover body after tightening the cover body operation, while guaranteeing sealing quality and product sealing performance, also can improve the comfort of opening cover.

The utility model discloses a linear actuator and a shifter. The linear actuator comprises a motor; a transmission assembly; a screw rod; a tubular telescopic member; the front pulling assembly is mounted at the end part of the tubular telescopic component through a clutch component; wherein the clutch assembly comprises a first connector, a second connector and an elastic component, the first connector and the second connector are kept relatively fixed in the circumferential direction and can relatively move in the axial direction when engaged, and the tubular telescopic component can independently rotate in the axial separation state of the first connector and the second connector. The clutch assembly is arranged between the front pulling assembly and the tubular telescopic component, and the clutch assembly is arranged to be of a structure that the first connector, the second connector and the elastic component are matched, so that if the tubular telescopic component encounters an obstacle in the retraction process, the second connector and the first connector are separated in the axial direction, and the tubular telescopic component idles; the tubular telescopic component is prevented from continuously driving an object connected to the front pull assembly to retract so as not to extrude an obstacle, and the obstacle is also prevented from damaging the linear actuator.

The novel damping structure comprises a bottom plate, two sets of fixed cross beams are arranged at the bottom of the bottom plate, the fixed cross beams are symmetrically arranged front and back, linkage plates are fixedly connected to the left sides and the right sides of the fixed cross beams, and the linkage plates are arranged in an L shape; the side, away from the fixed cross beam, of the linkage plate is in threaded connection with a connecting bolt. During cleaning, the weight of the top of the bottom plate is increased, at the moment, a pressing connecting block is downwards extruded, an umbrella-shaped damping spring is compressed by the pressing connecting block, an auxiliary spring is pulled, the damping effect is better through cooperation of the auxiliary spring and the umbrella-shaped damping spring, the auxiliary spring is better reset through stretching, and the service life of the auxiliary spring is prolonged. The problems that limit compression cannot be achieved through an existing single spring structure, and the reset effect of the umbrella-shaped damping spring is poor under the metal fatigue condition are solved, and the compression and reset limit effect of the umbrella-shaped damping spring is improved.

The utility model relates to the technical field of electric power equipment, in particular to a tool box for electric power technology detection. Comprising a box body, a pair of closing plates arranged on the box body and used for opening and closing the box body, locking blocks arranged on the closing plates and used for locking the closing plates, a containing box installed in the box body and used for containing tools, a drying plate arranged in the box body and used for absorbing humid air in the box body, and a storage box used for containing the drying plate. The dehumidifying mechanism is used for extruding the drying plate to discharge moisture after absorbing the humid air, and the dehumidifying mechanism comprises a guide rod for limiting sliding of the storage box in the vertical direction and an extruding block for converting sliding motion of the storage box into inclined extruding motion on the drying plate. According to the technical scheme, through the storage box, the guide rod and the extrusion block, the drying plate with saturated absorption can be automatically extruded to discharge water, the working time of the drying plate in the box body can be prolonged, and the dehumidification effect in the box body is improved in a disguised manner.

The present invention discloses a waterproof structure for expansion joints in civil engineering, including a casting layer of concrete cast on the left and right sides and an expansion joint formed between the casting layers, a foam plastic board is filled below the expansion joint, and a plurality of mounting seats are arranged at equal intervals from front to back on the casting layer surfaces on the left and right sides above the foam plastic board, wherein the mounting seats at the front and rear outermost ends are in a cube shape and have a semi-through rectangular mounting groove on the upper surface, and the mounting seats at the middle section are in a rectangular parallelepiped shape and have a fully through rectangular mounting groove on the upper surface, wherein the rectangular mounting grooves on the same side of the casting layer surface are embedded with fixed plates, and the inner side surfaces above the fixed plates are provided with V-shaped mounting grooves and V-shaped rubber waterproof plates are fixed between the V-shaped mounting grooves. The structure has a good waterproof effect, and the related components have a long service life, are safe and reliable, and are easy to install and use.

This application discloses a counterweight-balanced brush adjustment device for a candy packaging machine, including a frame, a candy-carrying turntable, arrayed candy-limiting holes, and a brush assembly. The brush assembly is connected to the frame via an elastic connecting component. A counterweight balancing mechanism is provided between the brush assembly and the frame. The counterweight balancing mechanism includes a screw connected between the brush assembly and the frame, with a counterweight connected to the middle section of the screw. When the counterweight moves along the screw towards the brush assembly, the weight of the counterweight causes the brush assembly to pull the elastic connecting component downwards. When the counterweight moves away from the brush assembly, the brush assembly returns to its original position and rises under the action of gravity and the elastic connecting component. This counterweight-balanced brush adjustment device, by utilizing the movement of the counterweight along the screw, can flexibly adjust the pressure of the brush assembly for candies of different heights, ensuring a proper cleaning effect for both tall hard candies and short soft candies during the packaging process.

The utility model is suitable for the technical field of transducers, and provides a transducer probe mounting device, which comprises a fixed chassis, the assembling cavity is formed in the upper surface of the fixed chassis; the balance steel ring gasket is arranged in the assembly cavity; the fixed flange is arranged above the balance steel ring gasket, and a through groove is formed between the fixed flange and the fixed chassis in a penetrating manner; the first silica gel gasket is arranged in the fixed flange; the detection main body is arranged in the through groove, and a blocking sheet is arranged at the lower part of the detection main body; the second silica gel gasket and the two locking blocks are arranged on the blocking piece; according to the utility model, a plurality of components are matched to form an efficient and reliable mounting device, the components not only respectively undertake important functions, but also greatly improve the performance and stability of the whole device through the synergistic effect among the components, and in addition, the device also has excellent damping and resetting capabilities, so that the service life of the device is prolonged. The detection main body can be protected from being damaged when being subjected to external impact or vibration, and the detection main body can quickly recover to the original state.

The utility model relates to the technical field of valves, in particular to a valve for controlling hydrogen fuel pressure, which comprises a valve body, two threaded rings are mounted on the surface of the valve body, a valve cover is mounted on the surface of the valve body, a handle is mounted on the surface of the valve body, and a connecting pipe is communicated with the surface of the valve body. A pressure gauge is installed at the end, away from the valve body, of the connecting pipe, a limiting structure is arranged on the surface of the valve deck and comprises a first spring, the first spring is fixedly connected with the surface of the valve deck, a bottom plate is fixedly connected to the end, away from the valve deck, of the first spring, and a top plate is fixedly connected to the surface of the handle. A plurality of teeth are fixedly connected to the sides, close to each other, of the bottom plate and the top plate, and a groove is formed in the arc surface of the bottom plate. According to the utility model, the problems that the valve is opened or closed accidentally due to the fact that the handle is touched by mistake, hydrogen fuel is easy to leak or the supply of the hydrogen fuel in a pipeline is insufficient are solved.

The utility model discloses an ultra-low energy consumption energy-saving door and window with a corner protection structure, which comprises a door and window main body, door and window glass is mounted in the door and window main body, a mounting component is mounted on the surface of the door and window main body, a protection mechanism is inserted in the mounting component, and a limiting mechanism is fixedly connected to the side surface of the mounting component. The installation bolts penetrate through the installation plate to be in threaded connection with the door and window glass, the installation frame can be conveniently installed, the installation strip can be conveniently inserted and installed, meanwhile, the buffering cotton cushion placed in the protection cover can play a buffering protection role, and the door and window main body and the door and window glass can be conveniently prevented from falling off in the using process. And the corners of the door and window main body can be protected.

The utility model provides an electromagnetic valve and a fuel cell system. The electromagnetic valve comprises a valve body, an electromagnetic coil, a movable iron core and a detection assembly, a containing cavity is formed in the valve body, a medium inlet and a medium outlet are formed in the valve body, and a medium circulation channel is formed between the medium inlet and the medium outlet; the movable iron core is arranged in the containing cavity, the electromagnetic coil is arranged on the valve body, the electromagnetic coil is electrified to enable the movable iron core to slide between a first position and a second position, the movable iron core blocks the medium circulation channel when the movable iron core is located at the first position, and the movable iron core conducts the medium circulation channel when the movable iron core is located at the second position; the detection assembly comprises a first electric connecting piece and a second electric connecting piece, an external detection circuit is connected between the first electric connecting piece and the second electric connecting piece, and the first electric connecting piece and the second electric connecting piece can abut against the movable iron core moving to the second position so as to conduct the external detection circuit. According to the electromagnetic valve, the movable iron core can be judged to be opened in place through conduction of the detection circuit, and therefore faults can be found in time.

The utility model belongs to the technical field of abdominal wheel structures for bodybuilding, in particular to a wheel body of an abdominal wheel, which comprises a wheel body, a rotating shaft penetrates through the middle of the wheel body, the rotating shaft is rotatably connected with the wheel body, and a spring is arranged between the rotating shaft and the wheel body. The spring is located in the wheel body, one end of the spring is fixed to the wheel body, and the other end of the spring is fixed to the rotating shaft. The spring is formed by transversely surrounding a metal wire; a sleeve is arranged on the side edge of the wheel body and extends into one end of the spring. A gap is formed between the spring and the sleeve, the wheel body rotates so that the spring can retract inwards, and the spring can abut against the outer side wall of the sleeve after deformation. Or no gap exists between the spring and the sleeve, and the spring abuts against the outer side of the sleeve. The wheel body of the power roller is simple in structure and provided with the reset spring.

The utility model relates to the technical field of welding devices, and discloses a stainless steel pipe splicing welding device which comprises a workbench, a welding assembly and a supporting column, an adjusting structure is arranged on the surface of the supporting column, a sliding groove is formed in the surface of the adjusting structure, a sliding plate is connected to the inner wall of the sliding groove in a sliding mode, a bolt is connected to the surface of the sliding plate, and a protruding block is connected to the surface of the sliding plate. Telescopic rods are connected to the surfaces of the sliding plates. One end of the spring is connected with the surface of the sliding plate, and the other end of the spring is connected with the inner wall of the sliding groove. The surface of the sliding plate is connected with a cushion, the size of the cushion is matched with that of the sliding plate, and the cushion is made of rubber. According to the utility model, the problems that the normal use of the device is affected and the device has potential safety hazards due to the fact that the material is often inconvenient to adjust quickly when the supporting column of the device needs to be adjusted are solved.

The utility model discloses a motor structure of an electric hair cutter, which comprises a support frame, a motor assembly, a mounting frame and a rotor assembly, and further comprises two pairs of reset elastic sheets which are respectively made of elastic plastics; the bearing plate is arranged at the bottom of the supporting frame, and supporting plates are vertically and fixedly connected to the two sides of the bearing plate correspondingly; each pair of reset elastic pieces are symmetrically distributed on the two sides of the supporting frame respectively, the top ends of the reset elastic pieces are connected with the corresponding mounting frames in an integrated forming mode, the bottom ends of the reset elastic pieces are connected with the corresponding supporting plates in an integrated forming mode, and the mounting frames, the reset elastic pieces, the supporting plates and the bearing plates form an annular structure surrounding the supporting frame. According to the utility model, the production cost can be reduced, the connection stability of the elastic sheet and the support frame is improved, the structural strength is improved, the restoring force of the elastic sheet can be ensured, and the service life of the motor structure is prolonged.

The invention discloses a resetting and fixing device for atlantoaxial dislocation. The device has the dual functions of assisting atlantoaxial movement and resetting and screwing and fixing, and has the advantages of good surgical effect and short surgical time. The device includes a resetting mechanism for adjusting and resetting the position of the atlantoaxial, and a fixing mechanism for fixing the atlantoaxial after resetting. The resetting mechanism includes an atlas fitting, a base and a resetting rod; the fixing mechanism includes an axis fitting, a first pedicle screw, a second pedicle screw, a fixing rod and a positioning nut; the axis fitting and the atlas fitting are both formed by 3D printing combined with subtractive processing.

The invention belongs to the technical field of optical imaging equipment, and particularly relates to a base assembly and a lens driving device. Wherein the base assembly comprises a base, a reset mechanism and a base plate, the base plate is movably installed in an inner cavity of the base through the reset mechanism, the reset mechanism comprises a lower reed, an upper reed and a frame, the lower reed is connected between the base and the frame, and the upper reed is connected between the frame and the base plate; the substrate is provided with a coil group used for cooperating with the magnet group. When the coil group is electrified, the coil group cooperates with the magnet group to drive the substrate to move at least along a plane perpendicular to the optical axis. According to the invention, the movement in a larger range can be realized, and a more excellent zoom and / or anti-shake effect can be realized, so that better imaging quality can be obtained. Through the design of the reset mechanism, after the base plate is moved, a good reset effect is achieved under the action of the reset mechanism.

The invention relates to the technical field of additive manufacturing equipment. The closed type environment-friendly charging and mixing device for ceramic 3D printing large-scale production comprises a base, a stirring bin, a stirring device and a top cover, the top cover and the stirring bin are closed to form a closed space, and the requirement for environment-friendly production is met. The stirring device is composed of a driving device, a movable device and an adjusting device, and the driving device, the movable device and the adjusting device cooperatively construct a multi-dimensional three-dimensional stirring flow field. The driving device provides double transmission power, the movable device achieves accurate power transmission and stirring track fine adjustment, and the adjusting device can flexibly adjust the stirring posture and the material contact range. Through multi-component linkage, ceramic powder is effectively prevented from sinking to the bottom and caking, the mixing requirements of materials with different viscosities are met, the material mixing uniformity and the production continuity are improved, the maintenance cost and the material waste are reduced, the structure is stable and reliable, the device is suitable for ceramic 3D printing large-scale production, and good practicability and popularization value are achieved.

The utility model discloses a linear actuator and a shifter. The linear actuator comprises a motor; a transmission wheel; a screw rod; a tubular telescopic member; wherein the transmission wheel comprises a transmission hole, the lead screw comprises a transmission section, the transmission section is meshed in the transmission hole, and the transmission section and the transmission hole are kept to rotate synchronously in the circumferential direction and can move relatively in the axial direction, so that the lead screw can move in the extending direction of the tubular telescopic component when subjected to axial tension load, and the transmission section and the transmission hole are separated in the axial direction; power transmission between the transmission wheel and the lead screw is cut off; and the elastic component acts on the lead screw to keep the stress state of the lead screw in the retraction direction of the tubular telescopic component. The lead screw is arranged to be of a structure capable of moving in the axial direction of the transmission wheel, so that in the retraction process of the tubular telescopic component, if the tubular telescopic component encounters obstacles, the tubular telescopic component drives the lead screw to move in the direction away from the side of the transmission wheel along the central shaft, the transmission section is not meshed with the transmission hole any more, and the transmission wheel is driven by the motor to idle; and the damage of the linear actuator caused by the obstacle is avoided.

The utility model discloses a fuel gas monitoring alarm system which comprises a hanging plate and a fuel gas monitoring alarm arranged on one side of the hanging plate, a groove is formed in the middle of the hanging plate, a two-way screw is arranged on the inner wall of the groove, the two ends of the two-way screw are connected with thread bushings in a threaded mode, and the thread bushings abut against the inner wall face of the groove. Clamping plates for clamping the gas monitoring alarm are arranged on one sides of the two sets of threaded sleeves, limiting assemblies for limiting displacement of one side of the gas monitoring alarm are arranged at the lower ends of the clamping plates, each limiting assembly comprises a fixing pipe, a spring, a guide rod and a contact plate, the fixing pipes are arranged at the ends of the clamping plates, the springs are arranged in the fixing pipes in a sleeved mode, and the guide rods are arranged in the contact plates. One end of the spring is connected with the inner wall face of the fixing pipe, the two-way screw rod is rotated in the forward direction or the reverse direction, the threaded sleeve is limited by the groove to drive the clamping plates to move in the direction away from or close to each other, and therefore the fuel gas monitoring alarm can be conveniently and rapidly disassembled and assembled in the overhaul process, and use convenience is greatly improved.