30results about How to "Keep tight" patented technology

The utility model discloses a birch extract preparation device which comprises a collecting box, the collecting box is installed on external equipment, a collecting mechanism is arranged on the collecting box, and the collecting mechanism comprises a squeezing mechanism, a supporting rod, a fixing sleeve, a discharging pipe, an inner sleeve, a rubber ring, a clamping mechanism, a pushing sleeve, a synchronous rod and a synchronous sleeve. The squeezing mechanism is installed on the collecting box, the supporting rod is installed in the collecting box, the fixing sleeve communicates with the side wall of the collecting box, one end of the discharging pipe communicates with external equipment, the other end of the discharging pipe is slidably connected into the fixing sleeve, the inner sleeve is installed on the discharging pipe, and the rubber ring is installed on the inner sleeve. The collecting mechanism provides an effective mode to collect and store the extracting solution, and through cooperative work of the squeezing mechanism, the supporting rod, the fixing sleeve, the discharging pipe, the inner sleeve and the rubber ring, the collecting mechanism can effectively guide and keep the solution in the collecting box in the extracting process.

The utility model relates to a broken bridge aluminum window frame with a drainage structure, and belongs to the field of broken bridge aluminum doors and windows, the broken bridge aluminum window frame comprises a window frame body, the window frame body comprises aluminum profiles located on the two sides, and an isobaric cavity is formed between the two aluminum profiles; an isobaric rubber strip is arranged outside the isobaric cavity, an abutting part of the isobaric rubber strip comprises a plurality of protruding heat insulation strips, a plurality of first drainage holes are formed between every two adjacent heat insulation strips, and a plurality of second drainage holes are formed in the supporting part; an inner drainage cavity is formed in the aluminum profile close to the indoor side, and an inner drainage opening is formed in the inner drainage cavity. An outer drainage cavity is formed in the aluminum profile close to the outdoor side, and an outer drainage opening is formed in the outer drainage cavity. The first drainage hole, the second drainage hole and the inner drainage opening close to the indoor side are communicated to form an inner drainage channel; the first drainage hole, the second drainage hole and the outer drainage opening close to the outdoor side are communicated to form an outer drainage channel. The heat insulation strip has the effect that accumulated water between the adjacent heat insulation strips can be cleared away more conveniently.

The utility model discloses a transmission belt clamp structure of a linkage door, which is used for being assembled between two adjacent linkage door bodies, and comprises a transmission belt clamp used for performing linear motion along with a transmission belt of one of the linkage door bodies, and the transmission belt clamp comprises a clamp assembly part; the linkage piece comprises a linkage piece installation part located at one end of the linkage piece and a transmission belt clamp assembly table located at the other end of the linkage piece, the linkage piece installation part is assembled to the other linkage door body, a sliding hole is formed in the transmission belt clamp assembly table in the first direction, and the clamping piece assembly part is arranged in the sliding hole in a sliding mode; the end, penetrating through the sliding hole, of the clamping piece assembling part is connected with a limiting bottom plate. When the linkage door bodies are folded or opened, the sliding holes enable the clamping piece assembling parts to continue to slide in the moving direction of the linkage door bodies, and therefore the two door bodies can be flush when folded, the two linkage door bodies can be fully opened when opened, and the space utilization rate is maximized.

The invention relates to the technical field of composite wall materials, in particular to a flame-retardant and anti-aging composite wall material and a preparation process thereof. The waterproof coating comprises the following components: 0.5 to 1.5 parts by weight of an antioxidant, 13 to 17 parts by weight of Portland cement, 2 to 4 parts by weight of epoxy resin, 1 to 3 parts by weight of polyurethane, 0.8 to 1.2 parts by weight of an ethylenediamine curing agent, 2 to 6 parts by weight of glass fiber, 4 to 8 parts by weight of aluminum hydroxide, 3 to 11 parts by weight of 2-diphenylphosphine ethanethiol, 2 to 4 parts by weight of a polydimethylsiloxane waterproof agent and 2-(2-diphenylphosphine ethanethiol). The component A comprises the following components in parts by weight: 0.1-0.5 part of 2 '-hydroxy-5'-methylphenyl) benzotriazole, 0.2-0.4 part of lauryl sodium sulfate and 55-65 parts of a fly ash filling material; wherein the antioxidant is prepared by mixing amifostine mercaptan and a coupling agent according to a molar ratio of 1: (1.0-1.2); the coupling agent is prepared by mixing hexamethylene diisocyanate and gamma-glycidyl propyl trimethoxy silane; the curing agent is a mixture of a curing agent and a curing agent; the antioxidant is adopted, so that the anti-aging and flame-retardant effects of the wall material are improved, the interface compatibility is improved, and the stability of the material is improved.

The invention relates to the field of water pumps, in particular to a valve element structure and a pump body thereof, the valve element structure comprises a main body framework and a sealing ring arranged on the main body framework in a sleeving mode, a circle of assembling groove position matched with the sealing ring is formed in the outer side of the main body framework, and the sealing ring is arranged on the corresponding assembling groove position in a sleeving mode; the hardness of the main body framework is larger than that of the sealing ring. The main framework serves as a main supporting structure of the valve element, the hardness of the main framework is larger than that of a sealing ring, and it is guaranteed that the valve element has enough rigidity and stability when bearing fluid pressure or mechanical stress. The main body framework is prevented from deforming under high pressure or high back pressure, so that the integrity and the sealing performance of the main body framework structure are kept. The sealing ring is arranged on the assembling groove position of the main body framework in a sleeving mode, and the good sealing effect is achieved through close fit.

The utility model discloses a multifunctional firework lead twisting device, and relates to the technical field of ammunition. A multifunctional firework lead twisting device comprises a base and a supporting plate, a tensioning device is arranged on the supporting plate and comprises a sliding seat, a fixed mounting block, a rotary mounting block and a second hydraulic telescopic rod, the supporting plate is fixedly mounted on the upper surface of the base, and the fixed mounting block is fixedly connected to the outer wall of the rear end of the supporting plate. The outer wall of the lower end of the rotary mounting block is rotationally connected with the interior of the upper end of the fixed mounting block, a second hydraulic telescopic rod in the tensioning device stretches out and draws back to drive a movable block to move, a movable rod is made to rotate, then a supporting frame is pushed to move, the position and angle of a guide frame are adjusted, and proper tension is applied to a lead. The device ensures that the lead is kept in a tight state in the twisting process, thereby avoiding the phenomena that the thread rope is easy to loosen and wind in the releasing process, the lead is not uniform in twisting degree and even loose, and the practicability and flexibility of the device are reduced at the same time.

This utility model relates to the field of battery cell technology and discloses a novel soft-pack PACK structure, including a housing. A cover is fixedly connected to the outer wall of the housing, and a sealing ring is fixedly connected to the inner wall of the cover. A support is installed inside the housing, and an epoxy board is fixedly connected to the outer wall of the support. Copper-aluminum composite busbars are installed on the left and right outer walls of the epoxy board, with threaded rods threaded into the interior of the copper-aluminum composite busbars. An aluminum busbar is fixedly connected inside the epoxy board, and a pressure strip is provided on the outer wall of the aluminum busbar. In this utility model, the housing and cover house the battery cells to protect them from external impact damage. An epoxy board is placed on the side of the support, and then an aluminum busbar is installed inside the epoxy board. A pressure strip is then fixed to one side of the aluminum busbar, and a data acquisition line is placed between the pressure strip and the aluminum busbar. This achieves the effects of ensuring battery cell overcurrent, welding strength, and stable data acquisition.

This utility model relates to the technical field of waterproof material production equipment, specifically to an integrated online quality monitoring and defect early warning device. It includes a lower panel and an upper frame positioned above the lower panel. Industrial cameras are mounted on the adjacent sides of both the lower panel and the upper frame. Two sets of vertical plates are fixedly mounted on the upper surface of the lower panel, with conveying rollers positioned between the two vertical plates in each set. The conveyed material passes through these rollers. Tensioning components are fixedly mounted on the adjacent sides of both the lower panel and the upper frame. Each tensioning component includes a support beam and an electric push rod positioned on one side of the support beam. A rectangular sleeve is mounted on the top of the support beam. A U-shaped frame is detachably connected to the end of the telescopic shaft of the electric push rod. The U-shaped frame is located within the rectangular sleeve and slidably connected to it. Tensioning rollers are rotatably connected between the front and rear plates of the U-shaped frame via a rotating shaft. This utility model facilitates the conveying and tensioning of the rolled material, promoting smooth monitoring.

The utility model discloses a beehive bottom four-corner eight-hole drainage device which comprises a drainage plate, the drainage plate is installed at the bottom of a beehive, the four corners of the top of the drainage plate are each provided with a first drainage hole and a second drainage hole, and the angle between each first drainage hole and the corresponding second drainage hole is 90 degrees. And the first drainage hole and the second drainage hole are communicated with the inner cavity of the beehive. The beehive bottom drainage device has the advantage of being good in drainage effect, and the problems that in the using process of an existing beehive bottom drainage device, the drainage efficiency of accumulated water in a beehive is low, the humidity in the beehive is likely to be high, healthy growth of bees in the beehive is affected, and the quality of honey in the beehive can be affected are solved.

The utility model discloses a rinsing bath which comprises a shell and universal wheels, the universal wheels are installed on the lower end face of the shell, an adjusting mechanism is arranged on the shell, and the adjusting mechanism comprises a water supply mechanism, a hard pipe, a fixed pipe, a spray pipe, an inner sleeve, a clamping sleeve, a side plate, a clamping spring, an inner pipe, a spoiler, a spoiler and a moving mechanism. The water supply mechanism is connected to the shell and the hard pipe in a matched mode, the fixing pipe is connected to the hard pipe in a threaded mode, the adjusting mechanism provides the capacity of accurately adjusting and controlling the flow speed and is suitable for treating automobile parts with different cleaning requirements, and through the combination of the hard pipe, the fixing pipe, the spray pipe, the inner sleeve, the side plate, the clamping sleeve, the clamping spring, the inner pipe, the spoiler and the spoiler, the cleaning effect is improved. The mechanism allows an operator to adjust the water flow strength according to the stain degree and the part sensitivity, and the adjustable design not only enhances the flexibility of the cleaning effect, but also improves the overall energy efficiency and resource utilization efficiency.

This invention provides a water diversion irrigation channel, relating to the field of irrigation technology, comprising: a steel-constructed channel body, the main body of which is a cylindrical structure with an open top, and a limiting plate fixedly installed inside the opening; a check valve plate, hinged inside the steel-constructed channel body, with an integrally formed counterweight at the bottom rear side, and the top rear side of the check valve plate contacting the limiting plate; a suction cylinder and a rotating arm, providing a drainage structure for quick positioning and assembly. The suction cylinder naturally swings with the up-and-down movement of the float, ensuring that the float preferentially draws water from the surface; the rotating arm is rotated upwards, and a spring locking block engages in a triangular slot to fix the direction of the rotating arm, and then an H-shaped pipe is installed, ready for pumping. Installation is convenient, and both the suction cylinder and the rotating arm maintain conveying and sealing during rotation, solving the problem of pipes easily deviating during use in existing channels.

The utility model relates to a compression-resistant fireproof door which comprises a door leaf and a door frame which are matched with each other, a gas storage cavity is constructed in the door leaf, and the door frame is of a hollow structure, communicated with the gas storage cavity and provided with an exhaust port. An air inlet communicated with the interior of the air storage cavity is formed in one side of the door leaf, a blocking assembly keeping the air inlet normally closed is arranged at the air inlet, and when the pressure intensity at the air inlet reaches the threshold value state, the blocking assembly keeps the air inlet open. Under the action of position matching between the air inlet and the air storage cavity and the blocking assembly, when one side of the door leaf deals with strong pressure brought by a fire, the pressure relief effect can be achieved, and when the pressure is reduced to a certain degree, the air inlet is closed again, so that the sealing effect of the door leaf relation is kept through low pressure, and the service life of the door leaf is prolonged. In this way, a good resistance effect on high pressure can be achieved in the whole process, the service life of the building is prolonged, and meanwhile the building is protected.

The utility model relates to curtain wall technical field especially relates to a kind of aluminium alloy door and window curtain wall sealing structure.Its technical scheme includes:one kind of aluminium alloy door and window curtain wall sealing structure, including curtain wall board, sealing element is installed between the curtain wall board, the sealing element is equipped with framework, the top of the framework is equipped with second sealing pad, the bottom of the framework is equipped with sealing strip, water baffle is opened in the sealing strip, flexible support column is inserted in the water baffle, the first sealing pad is connected in the framework by water baffle.The utility model is simple and easy to understand, and installation process is convenient and fast, without complex tool and operating procedure.Sealing element is connected tightly and firmly between each component, and it is not prone to loosening or falling off, reduce maintenance cost and difficulty.When needing to replace or repair sealing structure, only corresponding component can be disassembled, without large-scale modification to entire curtain wall.

The invention belongs to the technical field of jet devices, and discloses a jet device array group with a proportional valve mechanism, which comprises a first inlet pipe, a pneumatic proportional valve arranged at the top of the first inlet pipe, a first connecting pipe arranged at one end of the first inlet pipe, three conveying pipes arranged at the top of the first connecting pipe, and a pneumatic butterfly valve arranged at one end of each of the three conveying pipes. A second inlet pipe is arranged at the top of the pneumatic butterfly valve, an ejector is arranged at the top of the second inlet pipe, and a second connecting pipe is arranged at the top of the ejector. Through the first air inlet pipe and the second air inlet pipe, the jet devices enable a carbon dioxide injection mode to be more stable, after carbon dioxide is injected at 25 DEG C, the carbon dioxide can be filled into a bottle without bubbling, a large-flow ice water machine and a heat exchanger are not needed to cool a beverage to be less than 12 DEG C, and a plurality of jet devices can be installed at the same time. And the PLC is used for controlling the valve to change the flow, so that automatic adjustment of different filling quantities is achieved, and the filling machine can be adapted to more product lines and has multiple purposes.

A thermal insulation system for high-temperature industrial tanks and equipment, comprising a thermal insulation material (2), a covering system (3), and a support system. The covering system (3) includes covering sheets (5) attached only to the support system. Adjacent covering sheets (5) overlap longitudinally, creating overlapping sections (8) comprising an upper portion (9) of one adjacent covering sheet (5) and a lower portion (10) of the other adjacent covering sheet (5). At least one substantially omega-shaped longitudinal assembly fastener (11) is located at each overlapping section (8), on the inner sides of the covering sheets (5), which has a first end (12) attached to the upper portion (9).), a central part (13) separated from the cover sheets (5) and a second end (14) coming into contact with the lower part (10) of the covered part (8) and pressing on said lower part (10).

This invention relates to the field of optoelectronic detection equipment, specifically an improved industrial optical fiber structure with adjustable transmission band and filtering function. To achieve the above objectives, the invention employs the following technical solution: it comprises an optical fiber head, a first optical fiber, a second optical fiber, a filtering component, and a third optical fiber; the first and second optical fibers are inserted into the optical fiber head from the left side to its left end face to form an optical path entrance; the second optical fiber continues to be inserted into the filtering component from the right; the third optical fiber is inserted into the filtering component from the right side and optically connected to the second optical fiber at the filter, completing the optical path transmission; by introducing a replaceable filter component into the optical fiber path, the optical fiber itself possesses filtering function, eliminating reliance on terminal equipment for band selection and significantly enhancing the flexibility of band selection; simultaneously, it achieves a glue-free, reusable connection method, improving maintenance efficiency and component reusability.

The utility model discloses an anti-deformation rubber sealing element, which belongs to the technical field of rubber sealing elements and comprises an outer protective layer, connecting rings are fixedly connected to two ends of the inner wall of the outer protective layer, reinforcing frames are fixedly connected to the peripheries of opposite surfaces of the connecting rings at the two ends, and thickening components are fixedly connected to the inner peripheries of the opposite surfaces of the connecting rings at the two ends. Clamping grooves are formed in the opposite faces of the connecting rings at the two ends, and widening assemblies are clamped in the clamping grooves; through cooperative use of the devices, the thickening assembly and the reinforcing frame, the supporting performance of the middle structure of the sealing element can be improved, so that the compression resistance and the deformation resistance of the middle structure are enhanced, deformation caused by pressure or temperature changes in the using process is effectively reduced, the original shape and the sealing performance of the sealing element can be kept, and the service life of the sealing element is prolonged. The stability and reliability of the sealing effect are ensured, and through the combined arrangement, the single structure of the sealing piece can be conveniently and rapidly disassembled and independently replaced.

The utility model discloses a non-contact installation flange liquid level transmitter which comprises an ultrasonic liquid level transmitter, the ultrasonic liquid level transmitter is connected with an adapter through threads, the lower portion of the adapter is connected with a connecting pipe, the upper portion of the adapter is in flange connection with a widening plate, the lower portion of the widening plate is provided with a hydraulic damping rod, and the hydraulic damping rod is connected with the connecting pipe. The lower portion of the hydraulic damping rod is fixedly connected with an arc-shaped plate, and the outer side of the ultrasonic liquid level transmitter is sleeved with a sleeve. And by arranging the hydraulic damping rods, the arc-shaped plates and other structures, vibration generated when fluid passes through can be effectively absorbed, and the problem of connection looseness or leakage caused by vibration is solved. According to the ultrasonic liquid level transmitter, the stability and the sealing performance can be better kept in the long-time use process, so that the measurement precision is improved, the bent rod penetrates through the rectangular hole and is fixed through the locking bolt, it is guaranteed that the ultrasonic liquid level transmitter cannot fall off due to rotation or other external force in the operation process, and the safety and the reliability of equipment are improved.

The invention discloses grinding equipment of a coffee machine, and relates to the technical field of grinding equipment.The grinding equipment comprises a processing cylinder, a protection block is arranged on the outer surface of the processing cylinder, meanwhile, a processing assembly is arranged in an inner cavity of the processing cylinder, and coffee beans are ground through the processing assembly; according to the grinding equipment of the coffee machine, when the adjusting block moves, the adjusting block is limited in cooperation with the limiting rod, so that when the adjusting block rotates along with the circular ring, the adjusting block rotates around the connecting position of the limiting rod and slowly expands outwards till the adjusting block reaches a proper position. The outer surface of the adjusting block is in a blade shape and is used for preliminarily grinding coffee beans; when the driving piece is started, the grinding block arranged at the output end of the driving piece is synchronously driven to rotate, and the grinding block is attached to the inner wall of the through hole, so that the coffee powder is further ground until the coffee powder meets the standard.

The utility model relates to bitumen sampling technical field discloses a kind of bitumen sampling device, it includes barrel, plugging assembly and hook assembly;Barrel inside is provided with the storage cavity for storing bitumen, the bottom end of storage cavity is provided with first opening, the top of storage cavity is provided with second opening;Plugging assembly is set in storage cavity, and plugging assembly is located at the bottom end of storage cavity, and plugging assembly is along the length direction of storage cavity sliding for plugging first opening;Hook assembly includes first hook and second hook, first hook is set in the bottom end of storage cavity, and both ends of first hook are rotatably connected with the outer wall of storage cavity, second hook is set in the top of storage cavity, and both ends of second hook are arranged in the outer wall of storage cavity.

An electric power storage module 100 comprises an electric power storage device 1 and a holder 104 holding the electric power storage device 1. The electric power storage device 1 comprises: a plurality of cylindrical electrodes; a plurality of containers 12 individually containing the plurality of electrodes; and a film exterior 4 having a sealing part 14 sealing each container 12 and interconnecting the plurality of containers 12. The holder 104 is adhered to the sealing part 14.

This invention relates to the field of NdFeB internal mixing technology and discloses a MIM NdFeB sieving internal mixer, including a mixing cabinet with a mixing chamber and a feeding chamber. An additive cylinder and an active metal cylinder are installed in the feeding chamber, and a feeding channel is provided inside the feeding chamber, located below the additive and active metal cylinders and inclined towards the mixing chamber. A vacuum feeding device is provided on one side of the mixing cabinet, and a feeding space is provided below the mixing chamber, connected to the mixing chamber. A vacuum feeding channel is provided between the vacuum feeding device and the feeding space. The mixed material is transferred to the vacuum feeding device through the vacuum feeding channel. By pre-loading the additive into the additive cylinder and adding the active metal into the active metal cylinder of the device, the sealing and continuity of the addition environment are maintained, improving the internal mixing efficiency of NdFeB permanent magnets and reducing the oxidation waste rate of NdFeB powder.

The utility model relates to the technical field of wine bottle sealing and packaging, and discloses a wine bottle sealing and packaging machine which comprises a workbench, a controller is fixedly connected to the front side of the top end of the workbench, a machining table is fixedly connected to the rear end of the top end of the workbench, and a first motor is fixedly connected to the front side of the inner wall of the left side of the top end of the workbench. A second motor is fixedly connected to the rear side of the inner wall of the left end of the top end of the workbench, a handle is slidably connected to the right side of the top end of the machining table, a gear strip is fixedly connected to the bottom end of the handle, a plurality of transmission gears are connected to the rear end of the gear strip in an engaged mode, and fixing pipes are connected to the top ends of the transmission gears through clamping assemblies. The driving end of the first motor is connected with a sealing device through an adjusting assembly. According to the sealing device, a wine bottle can be conveniently fixed by the sealing device, the sealing device can be accurately aligned to a bottle opening through stable fixation, and the position of the sealing device can be adjusted to be in butt joint with the bottle opening for sealing treatment.

Provided are an igniter and a gas generator that suppress inhibition of fire transfer to an enhance agent by adjusting elongation of a cup-shaped member at the time of activation while maintaining sealability and insulation. A disk-type gas generator 100 has a short substantially cylindrical housing in which one end and the other end in an axial direction are closed, and a holder 30, an igniter 40 including a squib cover 43, a cup-shaped member 50, an enhance agent 59, a gas generating agent 61, a lower support member 70, an upper support member 80, a cushion material 85, a filter 90, and the like as internal components are accommodated in an accommodation space provided inside the housing. The squib cover 43 is formed by molding a thermosetting resin or a thermoplastic resin containing an elongation percentage adjusting material into a cup shape in order to set an elongation percentage at the time of activation of the igniter 40 to be greater than 0% and less than 10%.

The utility model relates to the technical field of slope protection, and discloses a water and soil conservation plant planting device which comprises a plant planting ring. The planting traction mechanism is movably arranged on the plant planting ring; one end of the rope is connected with the adjusting assembly, and the other end is connected with the peg; the ground nails are embedded in soil around the plants; the adjusting assembly can utilize the cooperation of a ratchet wheel and a pawl, so that the rope cannot be loosened after the plant is limited, the rope can only be stored and cannot be unwound, the use stability of the device in a wind power plant is improved, meanwhile, after planting of the plant is completed, a clockwork spring is in a stretched state, and the device is convenient to use. When the rope is loosened due to the loosening of a ground nail or other external force factors, the rope can be automatically stored, it is ensured that the rope is always in a tightened state, and the labor intensity of later maintenance is reduced while plants are stably planted; the problems that an existing planting device is large in size, inconvenient to carry and incapable of being adjusted in time in a wind power plant are solved.

The utility model discloses an ink packaging bag structure not prone to being damaged, and relates to the technical field of ink packaging bags. The printing ink packaging bag structure not prone to being damaged comprises a printing ink packaging bag and a limiting assembly, the printing ink packaging bag is composed of an anti-pollution layer, an airtight layer, a damp-proof layer and an outer protection layer, the limiting assembly is arranged on the printing ink packaging bag and comprises a rotating sleeve base, a clamping block and an elastic plate, and a clamping groove corresponding to the clamping block is formed in the outer wall of a discharging pipe. An elastic plate is fixedly installed on the outer wall of the rotating sleeve seat, and a clamping block is fixedly installed at the other end of the elastic plate. Through the arrangement of the discharging pipe, the threaded cover and the limiting assembly, correct positioning of the threaded cover during installation can be ensured through the arrangement of the clamping block, so that the sealing performance of the printing ink packaging bag is kept, printing ink can be effectively prevented from leaking or external pollutants can be effectively prevented from entering the packaging bag, and the printing ink quality and the integrity of the packaging bag are protected; and meanwhile, the threaded cover can be prevented from being damaged or deformed due to excessive tightening of the threaded cover by a worker in the mounting process.

The invention relates to the technical field of oil saws, and discloses an electric start oil saw, comprising an oil saw housing, a guide plate component being installed on the oil saw housing, the guide plate component comprising a No. 1 guide plate, the No. 1 guide plate being installed in the oil saw housing, a No. 1 plug-in slot being provided on the No. 1 guide plate, a No. 1 plug-in block being plugged into the No. 1 plug-in slot, the No. 1 plug-in block being fixedly connected to a No. 2 guide plate, the No. 2 guide plate being arranged on one side of the No. 1 guide plate, a guide plate telescopic driving device being arranged between the No. 1 guide plate and the No. 2 guide plate, chain mounting slots being provided on the No. 1 guide plate and the No. 2 guide plate, a chain assembly being installed on the chain mounting slot, and the scheme has the beneficial effect of freely controlling the cutting length of the oil saw, and solves the problem that the cutting length of the existing oil saw cannot be freely adjusted, resulting in the need to use oil saws of different specifications when cutting wood of different sizes.

The present invention discloses a fabric installation method for a chair and a chair frame thereof, wherein the fabric installation device for the chair frame comprises a frame and a workbench arranged on the frame; two stretching assemblies and two pressing assemblies are arranged on the workbench; the two stretching assemblies are respectively located at the left half and the right half of the workbench, and the two pressing assemblies are respectively located at the left half and the right half of the workbench; the stretching assembly is located in front of the pressing assembly; the stretching assembly comprises a bracket, a stretching member and a first cylinder for driving the stretching member to move, the bracket is fixedly mounted on the workbench, the first cylinder is fixedly mounted on the upper half of the bracket, the pressing assembly comprises a pressing member and a second cylinder for driving the pressing member to move, and the second cylinder is fixedly mounted on the workbench; through the technical solution, only one operator is required to complete the pressing of the chair frame, the tightening of the fabric and the installation of the fabric, thereby greatly improving the work efficiency.

The present application relates to the technical field of pedestrian bridge ground cover, specifically to a pedestrian bridge ground cover paint spraying handrail anti-pollution device, comprising: a protective baffle, a second guide groove, a second guide rod, a connecting bottom block, a connecting clamping groove, a connecting clamping block, a protective clamping piece and a range increasing component; beneficial effects are that: the protective baffle is placed on the outer side above the bridge handrail and the ground cover connection, then the handrail is clamped and protected by the protective clamping piece, then in the spraying construction of the municipal landscape bridge ground cover and the handrail and ground cover connection part, the bridge handrail is prevented from being polluted, the limiting plug is pulled out from the inside of the connecting bottom block by pulling the handle, and the limiting plug is separated from the connecting bottom block by the anti-dropping rope house, the protective clamping piece is disassembled by separating the connecting clamping block from the connecting clamping groove, different protective clamping pieces are convenient to replace, and different sizes of handrails are adapted.