45results about How to "Easy loading and unloading maintenance" patented technology

The invention discloses a continuous flipping vibration device of a screening barrel. The continuous flipping vibration device comprises a semicircular lug boss and a crescent adjustable falling force hammer, wherein the lug boss is fixedly connected onto the external column surface of the screening barrel, and an arc-shaped direction of the lug boss is the same as the peripheral direction of the screening barrel; the middle of the adjustable falling force hammer is fixedly connected onto a rotary shaft above the screening barrel and is bent downwards; two ends of the rotary shaft are connected onto two brackets in a rotatable manner, and the axis of the rotary shaft is parallel to the axis of the screening barrel; the two brackets are fixedly connected onto main frames on the two horizontal sides of the screening barrel; after the screening barrel rotates, the lug boss can touch a hammer head of the adjustable falling force hammer; and after the adjustable falling force hammer rotates, a hammer tail can touch the screening barrel. By utilizing continuous flipping of the semicircular lug boss and the crescent adjustable falling force hammer, automatic beating is realized; manual operation is reduced and more time and labor are saved; the efficiency is high and a screen mesh is not damaged; and the vibration effect is good, the cleaning effect is better and more energy is saved.

The invention discloses a test fixture for a low pass filter. The test fixture comprises a micrometer sliding table, an adaptive base, a circuit board and a flat spring fixture, wherein a groove is arranged on an upper end face of the adaptive base; a lower end face of the adaptive base is fixedly connected with the micrometer sliding table; the micrometer sliding table is fixed on the base and is capable of adjusting X and Y directions of the adaptive base; the circuit board and a positioning plate are fixedly arranged in the groove from bottom to top; the circuit board is connected with a monitoring device through a wire; the flat spring fixture is fixedly connected with a slide plate; the slide plate is connected with a rear lateral plate through two damping shafts and is capable of moving along the axial direction of a slide rail; a limiting groove for accommodating a detected filter is arranged on the positioning plate; after downward moving, the flat spring fixture is directly faced to the limiting groove. Under the buffering function of the flat spring fixture, the test fixture provided by the invention can prevent the detected component from being damaged by hard pressing. The test fixture can be mounted in the manner of adopting the positioning plate for limiting the position of the detected component and pressing by the flat spring fixture, so that high test efficiency and test result precision can be guaranteed.

The invention discloses a drilling clamp for a shell cover part of a hay mower and a use method thereof. The drilling clamp comprises a base plate, a left baffle, a right baffle, a spiral clamping device, a positioning element and a drilling template. According to the invention, two positioning pins are arranged on the left baffle and the spiral clamping device is arranged on the right baffle, so that the parts can be quickly detached, the processing precision can be ensured, and the drilling efficiency can be greatly increased; and the drilling clamp has the characteristics of simple structure, low cost and convenience in detaching and maintaining.

The invention discloses an automatic liquid flow rate stabilizer based on jet cavitation. The device comprises a feed pipe, a suction chamber, a stop collar, decompression rings, a nozzle and a cavitation cavity. The device firstly divides a flow from upstream into two parts, wherein one part is sprayed into the cavitation cavity after being accelerated and decompressed via the nozzle, while the other part also flows into the cavitation cavity after being decompressed by the decompression rings connected in series. The two flows are converged again in a shrinkable pipe in the cavitation cavity, the two flows generate a vortex and then generates a relatively large cavitation to cause cavitation inception, then violent cavitation clouds are rapidly formed in a choke to congest the whole choke, and gradually collapsed after being continuously developed to a diffusion pipe; the choke is full of the cavitation clouds, so that fluctuation of outlet pressure cannot be transmitted to the upstream of the choke, and thus a pressure difference between the feed pipe and the shrinkable pipe is always constant, and flow rate stability is achieved. The device provided by the invention is extremely rapid in response speed, invention high in flow rate stability, simple in structure, high in maintainability, strong in adaptation capacity to medium, and capable of being used in large scale.

The present invention discloses an electricity information collection system based on a medium voltage power carrier and a control method thereof. The system comprises a concentrated copy main station which is connected with a medium-voltage carrier host, the medium-voltage carrier host is connected with a coupler, the coupler is connected to a medium-voltage carrier slave and is coupled to a 10KV medium-voltage electric power circuit; the medium-voltage carrier slave is connected with a concentrator, and the medium-voltage carrier host / slave is composed of a high-speed carrier chip SSC1664 / 1663, an interface module connected with the medium-voltage carrier host / slave and configured to connect with the concentrated copy main station and an unvarnished transmission module configured to receive data. According to the invention, when data is transmitted, the highest rate can reach up to 5Mbps, the lowest rate can reach up to 100kbps, and the transmission rate is far superior to the transmission rate of the current medium-voltage power line carrier communication system, and the electricity information collection system based on the medium voltage power carrier and the control method thereof can support the new business development with high transmission rate requirement such as cost control, telecommand, telemetering and remote regulation, and remote switching of a valve.

The invention discloses a wheel type range finder which comprises a range finder body. The range finder body comprises a wheel carrier and a measurement wheel. The wheel carrier is connected with a guide wheel through a guide frame. A guide groove matched with a guide rail is formed in the wheel face of the guide wheel. The guide wheel is installed in front of the measurement wheel. The guide wheel with a positioning groove is installed on the wheel type range finder and conducts guiding in front of the measurement wheel, the guiding performance is good, it is avoided that the measurement wheel on the rail is likely to fall off the face of the rail, and the measurement precision is greatly improved. The range finder is placed on the face of the rail and can be pushed forwards at a high or low speed, more time and labor are saved for operators, the measurement efficiency is improved, the problems that in the prior art, measurement is not precise, operation is not convenient and time and labor are wasted are effectively solved, and the wheel type range finder has the advantages of being simple in structure, convenient to operate, use, assemble, disassemble and maintain, and low in price.

The invention discloses a fall-proof U-shaped foot pin for an iron tower and a use method thereof. The fall-proof U-shaped foot pin for the iron tower comprises a U-shape foot pin and a limiting plate, wherein the U-shape foot pin is arranged on a steel frame of the iron tower, end 1 of an open end of the U-shaped foot pin is fixedly connected with the steel frame, end 2 of the open end of the U-shaped foot pin is connected with the lower portion of the limiting plate, the two ends of the open end of the U-shaped foot pin are vertically arranged, the upper portion of the limiting plate passes through the end 1, and fixedly connected with the steel frame together with the end 1 in close mode, and a limiting groove clamped on the steel frame is formed in the back side of the lower portion of the limiting plate. By using the U-shaped foot pin and the limiting plate, the fall-proof U-shaped foot pin for the iron tower can be conveniently and quickly installed on the steel frame, saves a process of manufacturing holes in the steel frame, and is convenient to assemble and unassembled and maintain. Especially for remolding of a traditional reinforcing steel bar foot pin, an existing installation through hole is used, and then the limiting plate and the U-shaped foot pin can be conveniently and quickly installed on the steel frame of the iron tower, remolding is easy, shinning safety of the traditional iron tower and reliability of the foot pin are greatly improved, remolding cost is low, and the fall-proof U-shaped foot pin for the iron tower further has the advantages of being simple in structure and low in cost.

The invention discloses an anchor plate repair machine and a repair method thereof. The anchor plate repair machine comprises a machine frame, a hydraulic oil cylinder, a pressing plate and a bearing plate. The middle portion of the machine frame is of a cavity structure in the vertical direction. The tail end of a cylinder body of the hydraulic oil cylinder is fixedly connected to the top of the machine frame. The end of a piston rod of the hydraulic oil cylinder is fixedly connected with the pressing plate. The bearing plate is installed below the pressing plate and is a certain distance away from the pressing plate. The bearing plate is installed on the machine frame. The effective distance generated when the pressing plate moves downwards exceeds from the upper surface of the bearing plate. A deformed anchor plate is placed on the bearing plate, the pressing plate is driven to move downwards when the piston rod of the hydraulic oil cylinder moves downwards, the anchor plate which is deformed due to squeezing is pressed to be flat, the effect that the anchor plate is flattened and corrected conveniently and rapidly is achieved, time and labor are saved, the correction efficiency is greatly improved, the problems that in the prior art, when the deformed anchor plate is pressed to be flat manually, operation is inconvenient, labor hours are wasted, and the efficiency is low are solved, and the anchor plate repair machine also has the characteristics of being simple in structure, low in cost and convenient and fast to mount, dismount and maintain.

The invention discloses a thread stand of a waistband extension machine. The thread stand comprises a stand body, a take-up lever provided with first thread picking holes, and a thread rod with a tray. The stand body comprises a support rod and a plurality of placement platforms which are fixedly connected to the support rod. The support rod is fixedly connected to a support table which is installed on the right side of a waistband extension machine table. The take-up lever is rotationally connected to the support rod. The thread rod is connected to the placement platforms. The thread stand is fixedly connected to the support table and installed on the right side of the waistband extension machine table, thus the occupied area of the machine table is reduced, space for thread reel installation is increased, operation is more convenient and faster, time and labor are saved, and the thread stand of the waistband extension machine has the advantages of being simple in structure, convenient to operate, use, assemble, disassemble and maintain and low in price.

The invention relates to a ball valve, especially the ball valve with the split valve core. The valve body is equipped with the removable valve cover. The valve core installed in the valve body consists of two seal hemispheres and the wedge-shaped ball core installed between the seal hemispheres. The relative position between the seal hemispheres and the wedge-shaped ball core is determined by theanti-rotation guiding device. The top of the wedge-shaped valve core has the anti-rotation device and the thrust block is installed between the valve cover and the wedge-shaped ball core. The elasticunit is installed between the bottom of wedge-shaped ball core and the valve seat. The ball valve features easy switch; small ball valve wear, long service life; convenient installation and maintenance, etc., which can be applied to a wide range of area.

The invention discloses a small-size vibration and noise reduction frog structure for rail transit. The small-size vibration and noise reduction frog structure at least comprises a point rail, a wingrail, a fork heel rail, spacer iron and a conversion device, the heel end of the point rail and the front end of the fork heel rail adopt a spacer iron type movable joint structure or a spacer iron type double-limb inclined joint structure, the front end of the spacer iron is tightly attached to the wing rail, a certain gap is reserved between the spacer iron and the point rail, the rear end of the spacer iron is tightly attached to the wing rail and the fork heel rail, one side of the front end of the point rail is connected with one end of the traction rod, and the other end of the tractionrod is connected with the conversion device so as to drive the traction rod through the conversion device to pull the point rail. Therefore, the small-size vibration and noise reduction frog structureis simple in structure, convenient to assemble, disassemble and maintain, capable of meeting the vibration reduction requirements of various rails, made of alloy steel materials, capable of effectively improving the strength and prolonging the service life, capable of saving space and capable of overcoming various defects existing in an existing small-size turnout due to the fact that a fixed frog is adopted.

The invention relates to a vehicle-mounted kitchen waste crushing and pulping machine and a control method thereof. The vehicle-mounted kitchen waste crushing and pulping machine comprises a first-stage crushing and pulping cylinder (2) and a second-stage crushing and pulping cylinder (3) which are connected with each other, a kitchen waste pulp bin (4) is arranged at the bottom of the first-stage crushing and pulping cylinder (2) and the bottom of the second-stage crushing and pulping cylinder (3), a feeding port (1) is upwards formed in the top of the front end of the first-stage crushing and pulping cylinder (2), a kitchen waste residue outlet (5) is downwards formed in the top of the front end of the second-stage crushing and pulping cylinder (3), and a kitchen slurry outlet (12) is formed in the rear end of the kitchen waste slurry bin (4). Kitchen waste can be made into slurry with the water content of about 90% at the source, then the slurry is conveyed to a treatment plant through a kitchen collecting and conveying vehicle and is directly discharged into a kitchen material bin through a closed pipeline, sufficient crushing is achieved through secondary crushing and pulping, urban roads are prevented from being polluted by throwing, dripping and leakage, and meanwhile, secondary pollution of the kitchen waste to the air in the transportation process is further avoided.

The invention discloses a cloth feeding and covering device for a sewing covering machine. The cloth feeding and covering device comprises an oblique first cloth penetrating cavity, an oblique second cloth penetrating cavity and a covering opening, wherein the cloth outlet end of the first cloth penetrating cavity is connected with the cloth inlet end of the second cloth penetrating cavity, and a forwardly concave arc cavity is arranged in the middle of the second cloth penetrating cavity; wraparound cavities for crimping a cloth are arranged at the two sides of the second cloth penetrating cavity, and the cloth outlet end is connected with the covering opening; the covering opening is a backwardly oblique U-shaped opening, and the concave arc cavity is communicated with the wraparound cavities at the two sides. The first cloth penetrating cavity and the second cloth penetrating cavity are used for crimping and the covering is automatically completed by the covering opening, so that the time and labor are saved, the production efficiency is greatly improved, the covering is smooth and uniform, the covering effect is good, and the sewing is convenient. The problems that the production efficiency is low, the covering is not smooth and uniform, the effect is poor and the time and labor are consumed during manual covering in the prior art are solved. The cloth feeding and covering device also has the characteristics of simple structure, convenience in operation and use, assembly and disassembly, and maintenance, and low price.

The invention discloses a height-adjustable fabric accommodating frame. The frame comprises two vertical supporting rods, wherein the two supporting rods are fixedly connected onto a right-end supporting leg of a fabric cutting platform in a front-and-back symmetric manner, separable rotating shafts for winding fabric are placed at top ends of the two supporting rods, multiple vertically and evenly distributed mounting adjusting holes are formed in outer sides of the two supporting rods, the rotating shafts can rotate around axes, and the distance between every two adjacent adjusting holes is 1 / 2 the mounting distance between existing two rows of screw I and nuts I. The mounting adjusting holes are formed in the two supporting rods, the height of the supporting rods is adjusted by changing mounting positions of the screws and the nuts by the aid of the adjusting holes, coiled fabric with different diameters is mounted conveniently, the frame is convenient and quick to adjust and firm and stable to connect, and the frame further has the characteristics that the frame is simple in structure, low in price and convenient to mount, dismount and maintain.

The invention discloses an accommodating frame with supporting strength and rigidity convenient to improve. The frame comprises two vertical supporting rods, wherein the two supporting rods are fixedly connected onto a right-end supporting leg of a fabric cutting platform in a front-and-back symmetric manner, separable rotating shafts for winding fabric are placed at top ends of the two supporting rods, the rotating shafts can rotate around axes, a U-shaped reinforcing rib is mounted between the two supporting rods and comprises a transverse rod and two vertical rods fixedly connected with two ends of the transverse rod, the two vertical rods are fixedly connected with the two supporting rods, and the transverse rod is fixedly connected onto the fabric cutting platform. The U-shaped reinforcing rib is mounted between the two supporting rods to fixedly connect the two supporting rods and is fixedly connected onto the fabric cutting platform, so that the stability as well as supporting rigidity and strength of the supporting rods is greatly improved, and connection is firmer and more stable; the frame further has the characteristics that the frame is simple in structure, low in price and convenient to operate, use, mount, dismount and maintain.

The invention discloses a manual wire feeding mechanism for a buttonholing machine. The manual wire feeding mechanism comprises a wire drawing sheet and a rotating shaft. Two wire drawing holes are formed in the wire drawing sheet, the rotating shaft is rotationally connected on a machine body, one end of the rotating shaft is fixedly connected to one side of the wire drawing sheet, and a cranking handle is fixedly connected to the other end of the rotating shaft. According to the manual wire feeding mechanism, the cranking handle drives the rotating shaft, the rotating shaft drives the wire drawing sheet to rotate, a wire on the wire drawing sheet is sent frontwards by a section of the reserved length accordingly, buttonholing is conveniently shortened after being completed, and the inconvenient clipping technical problem caused by the insufficient reserved length in the prior art is effectively solved; the manual wire feeding mechanism also has the advantages that the structure is simple, operating, using, assembling, disassembling and maintaining are convenient, and energy is saved.

The invention discloses a fall-proof U-shaped foot pin for an iron tower and a use method thereof. The fall-proof U-shaped foot pin for the iron tower comprises a U-shape foot pin and a limiting plate, wherein the U-shape foot pin is arranged on a steel frame of the iron tower, end 1 of an open end of the U-shaped foot pin is fixedly connected with the steel frame, end 2 of the open end of the U-shaped foot pin is connected with the lower portion of the limiting plate, the two ends of the open end of the U-shaped foot pin are vertically arranged, the upper portion of the limiting plate passes through the end 1, and fixedly connected with the steel frame together with the end 1 in close mode, and a limiting groove clamped on the steel frame is formed in the back side of the lower portion of the limiting plate. By using the U-shaped foot pin and the limiting plate, the fall-proof U-shaped foot pin for the iron tower can be conveniently and quickly installed on the steel frame, saves a process of manufacturing holes in the steel frame, and is convenient to assemble and unassembled and maintain. Especially for remolding of a traditional reinforcing steel bar foot pin, an existing installation through hole is used, and then the limiting plate and the U-shaped foot pin can be conveniently and quickly installed on the steel frame of the iron tower, remolding is easy, shinning safety of the traditional iron tower and reliability of the foot pin are greatly improved, remolding cost is low, and the fall-proof U-shaped foot pin for the iron tower further has the advantages of being simple in structure and low in cost.

The invention discloses a filling device of an industrial water treatment reagent. The filling device comprises a reagent storage tank, a pump, nozzles and a storage rack of a bucket to be filled, wherein a feeding hole of the pump is connected with the reagent storage tank through a pipeline, and a discharging hole of the pump is connected with a flow valve; the flow valve is connected with a synchronous valve through a pipeline; the synchronous valve is connected with the plurality of nozzles through pipelines; each nozzle is mounted on a mounting plate; the mounting plate is connected onto a stand column through an up-down position adjusting mechanism; the storage rack of the bucket to be filled is arranged on a conveyor belt; the conveyor belt is used for moving the bucket to be filled under the nozzles; and the nozzles can be aligned to the bucket to be filled. The synchronous valve is connected with the plurality of nozzles, and synchronous filling is realized by connecting the pump with the reagent storage tank, so that the filling efficiency is greatly improved; the bucket to be filled is conveyed by the conveyor belt and the positions of the nozzles are adjusted by the adjusting mechanism, so that time and labor are saved; the trouble of singly weighing is reduced through the control of the flow valve and the weight is convenient to control, so that the production efficiency is greatly improved; and the filling device of the industrial water treatment reagent has the characteristics of convenience for operation and utilization, loading and unloading and maintenance, and convenience for controlling.

The invention discloses a gearbox rear shell drilling fixture and an application method thereof. The gearbox rear shell drilling fixture comprises a fixture plate which is provided with two positioning pins for positioning parts and a pressing device. The top ends of the positioning pins are ball heads. Two sets of drilling fixtures are arranged on the same fixture plate. According to the gearbox rear shell drilling fixture and the application method thereof, the two positioning pins and the pressing device are arranged on the fixture plate, and thus the parts can be rapidly assembled and disassembled; in addition, the machining precision can be ensured, the drilling machining efficiency is greatly improved, and the gearbox rear shell drilling fixture has the characteristics of being simple in structure, low in cost and convenient to assemble, disassemble and maintain.

The invention relates to a special negative pressure ventilation system for production improvement of a cement kiln, and belongs to the technical field of ventilation pipelines. In order to solve the problems that in a traditional negative pressure ventilation system, pipelines are inconvenient to assemble, and the pollution of gas emission is large, the following technical scheme is provided that the air duct comprises a first air duct pipe, a second air duct pipe and a filtering mechanism, a first clamping mechanism is arranged at one end of the first air duct pipe, and a second clamping mechanism is arranged at one end of the second air duct pipe; and a clamping mechanism plate is arranged in the air duct pipe II. Through combination of various structures, when the device is used for assembling a pipeline of a ventilation system, a clamping and fixing mode is used for replacing a traditional screw connection mode, so that the working efficiency of pipeline assembling is improved, and the filtering mechanism is arranged in the pipeline, so that the filtering effect is improved. Therefore, when the cement kiln is subjected to negative pressure ventilation through a pipeline, exhausted air can be filtered and exhausted, pollution to the atmosphere is reduced, the filtering mechanism is fixed in a clamping mode, and the assembling mode is simplified.

The invention discloses a crochet hook anti-swing structure which comprises a fixed rod fixedly connected to a bed. A plurality of arc anti-swing rods are arranged on the fixed rod; the free ends of the anti-swing rods extend to certain sides of crochet hooks in a downward bending manner and are close to the lateral surfaces of the crochet hooks. According to the crochet hook anti-swing structure disclosed by the invention, the anti-swing rods are mounted on the fixed rod and are in close contact with the crochet hooks to prevent the crochet hooks from swinging in a large range in the rotating working process, so that the phenomenon of skipped stitches is avoided, a pulling effect is better, a line trend is neater, and the problem of skipped stitches caused by the case that a plurality of rows of crochet hooks simultaneously work in the prior art is solved; moreover, the crochet hook anti-swing structure also has the characteristics of simple structure, convenience for operation, use, assembling, disassembling and maintenance, and low price.

The invention discloses a portable stone rolling device for karst regions. The device comprises a steel cylinder; the steel cylinder is fully filled with soil and stone layers, and is provided with detachable cylinder covers at the two ends; and each cylinder cover is connected with a pull rope. A traditional stone roller is changed to a hollow steel cylinder; after the detachable cylinder coversare unloaded, the steel cylinder is fully filled with scene soil and stones to obtain the weight of the steel cylinder; lands are compacted through labors or bull pulling, so that the stone rolling function is achieved, the stone roller is convenient to carry and move, the equipment conversion labor intensity is greatly reduced, both time and labors are saved, and the problem of incapability of adapting to the terrains of the karst regions due to inconvenience to carry caused by the stone roller being a large solid structure in the prior art is effectively solved; and the device has the characteristics of simple structure, low cost and fastness and convenience for loading, unloading and maintenance.

The invention provides a massage device and method, relates to the field of health care and health preservation; elements, compositions, shapes, sizes, structures, functions, control methods or / and use methods of a finger pressing plate and a sliding plate technology are changed through new application inventions and reverse thinking, and are transferred to the field of health care and health preservation. The unexpected technical effect is generated by utilizing the technical characteristics of technicians trying to avoid, a new purpose is formed, a user stands on the device when taking off shoes, the soles of the user are pressed and massaged by the device, and the effects of health care, health preservation and self-help rehabilitation are achieved more efficiently. The massage device is reasonable in structural design, convenient to assemble, disassemble and maintain, multifunctional, attractive, elegant, light, easy to use, convenient to move, low in using environment requirement,small in occupied area and capable of being used in business places and families in a self-service mode.

The invention relates to a capacitor multi-range test fixture, and belongs to the technical field of capacitor detection. The fixture comprises: a mounting base; a test bracket which is used for placing a capacitor; a test assembly which is used for testing the capacitor; and a pressing assembly which is installed on the test support and is used for adjusting the measuring range of the test assembly. The testing device has a multi-range function, and the sliding platform can be adjusted for testing according to testing capacitors with different sizes under the condition that the size of the case is not changed; according to the invention, four test capacitors can be tested at the same time during test, the test efficiency is high, the test contact copper bar has an elastic function and can be automatically fine-tuned, the contact surface can be ensured as large as possible during test, the test stability is good, the structure is simple and the fixture is convenient to install, detach and maintain.

The invention discloses a material placing device for a leather cutting platform. The device comprises two vertically arranged supporting rods, the supporting rods are symmetrically and fixedly connected with right supporting legs of a cloth cutting platform at front and back, the tops of the supporting rods are provided with separable rotary shafts winding with materials, bearings are arranged atthe two ends of the rotary shafts, and the outer rings of the bearings are clamped in U-shaped grooves which are formed in the tops of the supporting rods. According to the device, the two supportingrods are fixedly connected with the supporting legs of the leather cutting platform, the tops are provided with the separable rotary shafts winding leather materials, the leather material placement is achieved, the rapid conveying of the leather can be rotatably achieved, separable structures make it convenient for the replacement of different leather materials onto a supporting frame, the operation is convenient and fast, the supporting frame is fixed to the cutting platform, the stability and supporting rigidity of the placing frame are greatly improved, the structure is simple, the price is low, and the loading and unloading and maintaining are convenient.

The invention discloses a continuous flipping vibration device of a screening barrel. The continuous flipping vibration device comprises a semicircular lug boss and a crescent adjustable falling force hammer, wherein the lug boss is fixedly connected onto the external column surface of the screening barrel, and an arc-shaped direction of the lug boss is the same as the peripheral direction of the screening barrel; the middle of the adjustable falling force hammer is fixedly connected onto a rotary shaft above the screening barrel and is bent downwards; two ends of the rotary shaft are connected onto two brackets in a rotatable manner, and the axis of the rotary shaft is parallel to the axis of the screening barrel; the two brackets are fixedly connected onto main frames on the two horizontal sides of the screening barrel; after the screening barrel rotates, the lug boss can touch a hammer head of the adjustable falling force hammer; and after the adjustable falling force hammer rotates, a hammer tail can touch the screening barrel. By utilizing continuous flipping of the semicircular lug boss and the crescent adjustable falling force hammer, automatic beating is realized; manual operation is reduced and more time and labor are saved; the efficiency is high and a screen mesh is not damaged; and the vibration effect is good, the cleaning effect is better and more energy is saved.

An agricultural greenhouse photovoltaic power generation device with a thermoelectric power generation function disclosed by the present invention comprises a mounting rack, a solar cell panel is fixedly mounted on the inner side of the upper end of the mounting rack, a positioning frame is fixedly mounted at the lower end of the mounting rack, and a fixing rack is connected to the inner side of the positioning frame in an inserted manner. A fixing mechanism is arranged on the inner side of the positioning frame, the positioning frame is connected with the fixing frame in a clamped mode through the fixing mechanism, an ejection mechanism is arranged on the inner side of the fixing frame, and a thermoelectric power generation mechanism is arranged at the upper end of the ejection mechanism. The aluminum sheet is mounted at the lower end of the aluminum plate, heat on the aluminum plate can be subjected to first-stage heat dissipation through the aluminum sheet, then the heat is subjected to second-stage heat dissipation through a curved sheet expanding heat dissipation surface outside the aluminum sheet, and finally, the heat dissipation grooves in the curved sheet are combined to perform third-stage heat dissipation, so that the natural heat dissipation effect of the aluminum plate can be improved, and the service life of the aluminum plate is prolonged. The power generation efficiency of the thermoelectric power generation sheet is enhanced.

The invention relates to the technical field of hardware assembly parts, in particular to a structure-adjustable self-locking screw rod. The structure-adjustable self-locking screw rod comprises a first external threaded rod and a second external threaded rod. According to the structure-adjustable self-locking screw rod, the first external threaded rod and the second external threaded rod are movably connected through an internal assembling shaft in a circular assembling through hole, and contraction grooves internally provided with elastic locking rings are formed in the assembling planes of the external threaded rods; the assembling angle between the first external threaded rod and the second external threaded rod is adjusted and fixed through mutual meshing of the elastic locking rings, so that the structure of the screw rod is adjustable, and the application range is wider; and lateral mounting inserting grooves internally provided with internal limiting inserting blocks are formed in the outer side faces of the external threaded rods, extrusion springs are limited by inserting internal limiting inserting blocks into lateral mounting inserting grooves, meanwhile, later assembling, disassembling and maintenance are facilitated, and the later use cost is reduced.

The invention discloses a wheel type range finder which comprises a range finder body. The range finder body comprises a wheel carrier and a measurement wheel. The wheel carrier is connected with a guide wheel through a guide frame. A guide groove matched with a guide rail is formed in the wheel face of the guide wheel. The guide wheel is installed in front of the measurement wheel. The guide wheel with a positioning groove is installed on the wheel type range finder and conducts guiding in front of the measurement wheel, the guiding performance is good, it is avoided that the measurement wheel on the rail is likely to fall off the face of the rail, and the measurement precision is greatly improved. The range finder is placed on the face of the rail and can be pushed forwards at a high or low speed, more time and labor are saved for operators, the measurement efficiency is improved, the problems that in the prior art, measurement is not precise, operation is not convenient and time and labor are wasted are effectively solved, and the wheel type range finder has the advantages of being simple in structure, convenient to operate, use, assemble, disassemble and maintain, and low in price.