173 results about "Cross bracing" patented technology

The invention provides a cable-stayed bridge cross brace hoisting monitoring and early warning method, and the method comprises the steps: building a finite element model based on the design parameters of a cable-stayed bridge and a cross brace, and calculating the safety envelope of the displacement, rotation angle and stress of a control point; displacement, strain and cable force sensors and industrial cameras are arranged in a cross brace and an anchoring area, and data and images are collected. Inputting the image into a first convolutional neural network model, extracting attitude parameters such as vertical and lateral offsets and torsion angles of each control point, and adapting to different imaging scales through a scale adaptive convolution module; and aligning and splicing the attitude parameters with sensor displacement, strain and cable force indexes according to time to form a feature sequence, inputting the feature sequence and safety envelope parameters into a second convolutional neural network risk assessment model, outputting a comprehensive risk index reflecting deviation from safety envelope, and generating construction treatment instructions such as hoisting speed reduction and hoisting point stress adjustment. According to the monitoring and early warning method, the construction safety is greatly improved, and monitoring and early warning of the whole process of cross brace hoisting are achieved.

The utility model discloses an anti-tilt scaffold which comprises a steel frame and two crossed supporting rods arranged on the two sides of the steel frame, the outer sides of the four corners are respectively provided with a pair of fixing pieces, an inner rod is arranged between the fixing pieces, a plurality of limiting holes are formed in the inner rod, a sleeve rod is arranged on the outer side of the inner rod, and the sleeve rod is connected with the steel frame. An adjusting knob is arranged on the sleeve rod, through holes are formed in the two sides of the lower portion of the sleeve rod respectively, an inserting rod is arranged at the bottom of the sleeve rod, a spring is arranged on the outer side of the inserting rod, a base is arranged at the bottom of the inserting rod, rotating pieces are arranged on the two sides of the base respectively, and a bottom plate is arranged below the rotating pieces. According to the scaffold, the two sides of the steel frame can be supported, the steel frame is prevented from inclining towards the two sides, the safety risk of workers is reduced, and through friction between the inserting rods and the sleeve rods and the buffering effect of the springs, shaking of the scaffold can be reduced, and the scaffold is stabilized.

The utility model provides a kind of screw fastening auxiliary device in furniture processing medium board metal iron stand, it is related to screw fastening auxiliary technical field, including eccentric wheel, fastening mechanism and reinforcing mechanism, the fastening mechanism includes fastening plate and magnetic block, the inner bottom wall of the magnetic block is connected with fastening plate, inner top wall, the fastening plate and magnetic block are used to connect the fastening purpose of screw and eccentric wheel, the reinforcing mechanism includes counterweight, the inside fixed connection of the counterweight has cross plate, the inside fixed connection of cross plate and counterweight, in the utility model, when screw is connected with eccentric wheel, fastening plate can limit one end of screw, and magnetic block can adsorb and fix one end of screw, so that the purpose of double fastening of screw can be achieved, and the strength of eccentric wheel can be improved by using the weight of counterweight and the cross support of cross plate.

The utility model relates to the technical field of security engineering construction, in particular to a drilling device for security construction, which is safe to use and comprises a first U-shaped plate, a second U-shaped plate is arranged at the top of the first U-shaped plate, and a sliding rail and a two-way air cylinder are fixedly arranged on the surface of the first U-shaped plate and the surface of the second U-shaped plate respectively. The surfaces of the sliding rails are movably sleeved with supporting plates, and one ends of the two-way air cylinders are fixedly connected with the supporting plates. Through cooperation of the screw rod, the driving motor, the L-shaped plate, the one-way air cylinders and the installation plate, the drilling structure is installed on one side of the top of the screw rod in a threaded sliding mode, the L-shaped plate is installed on the first U-shaped plate through matching of the cross supporting column and the second U-shaped plate, and the drilling structure can be installed on the first U-shaped plate by adjusting the telescopic direction of the left-right two-way air cylinders. And the supporting plate can be driven to push the angle change of the cross supporting column, then lifting and transverse fine adjustment of the drilling structure on the L-shaped plate are achieved, and the drilling precision is improved.

The utility model discloses an aluminum ash recovery device, including chassis, big material receiving groove and small material receiving groove, be provided with gyro wheel at the bottom of chassis, be provided with first support in the both ends of chassis side edge, be provided with handle in the top of first support, be provided with cross bracing between the inner wall of chassis, be provided with big material receiving groove on the chassis, be provided with three small material receiving grooves in big material receiving groove, be provided with sieve hole in the bottom of small material receiving groove, be provided with opening in the side of big material receiving groove to set up chute at the opening place. The utility model discloses through setting up small material receiving groove in big material receiving groove, and setting up sieve hole in the bottom of small material receiving groove, can effectively separate aluminum liquid and aluminum ash residue, reduce the residue of aluminum liquid in aluminum ash residue, improved the recovery rate of aluminum liquid, through setting up opening and chute in the side of big material receiving groove, can guide the aluminum liquid after separation to the specified collection container, improved the separation efficiency, ensure that aluminum liquid can be collected and recovered in time.

The utility model belongs to the technical field of hydraulic engineering equipment, and particularly relates to a water delivery pipeline mud-blocking sand-blocking water-passing anti-floating device which comprises a main body frame, a sand-blocking net, a filtering net and a supporting rod, the main body frame is arranged on the outer wall of a water delivery pipeline in a sleeved mode, and the sand-blocking net is welded to the end of the main body frame and used for blocking large-particle silt and floating objects; the reinforcing frames are distributed in a shape like a Chinese character'mi ', water flow impact force is dispersed through a cross supporting structure, the deformation resistance of the device is enhanced, and the sand blocking net is protected; the filter screen is arranged on the inner side of the sand blocking screen to intercept fine particles layer by layer, so that the pollutant intercepting capacity is improved; the supporting rods are obliquely and vertically installed to form a multidirectional stress system, and the device is effectively prevented from floating in combination with a ballasting area at the bottom of the water conveying pipeline. Through layered filtration, mechanical dispersion and modular design, the technical problems that in the prior art, the interception efficiency is low, the structure is prone to damage, maintenance is difficult, and the buoyancy resistance is insufficient are solved, and the device has the remarkable advantages of being high in interception efficiency, stable in structure, convenient to maintain, high in adaptability and the like.

The utility model discloses a folding deck chair which comprises two side vertical frames which are oppositely arranged left and right and can be folded front and back, and a crossed support frame which is arranged between the two side vertical frames and can be folded left and right, each side stand comprises a footrest tube, a rear leg tube, a front leg pad, a front leg tube, a front backrest leg tube, a side stand supporting tube and a backrest tube, the rear end of the footrest tube is rotatably connected with the front end of the rear leg tube, the upper end and the lower end of the front leg tube are rotatably connected to the footrest tube and the front leg pad respectively, and the lower end of the side stand supporting tube is slidably arranged at the front backrest leg tube; the upper ends of the side vertical supporting pipes are rotationally connected to the rear foot pipes, the rear foot pipes and the front backrest foot pipes are hinged in an X shape, the lower ends of the front backrest foot pipes are rotationally connected to the front foot pad, the upper ends of the front backrest foot pipes are arranged at the backrest pipes in a sliding mode, and the lower ends of the backrest pipes are rotationally connected to the rear foot pipes. The rear ends of the rear leg pipes and the front leg pads are respectively used for supporting and matching with the ground. The folding deck chair disclosed by the utility model realizes full-gathering storage, and is small in occupied space and convenient to carry.

This invention belongs to the field of foundation pit support technology, specifically relating to an adjustable foundation pit engineering support structure. It includes support units, each comprising a support base plate and a support frame plate. The support base plate rests against the foundation pit wall, and the support frame plate is connected to the support base plate via an adjustable support. A cross bracing device supports the support frame plates of two support units in opposite directions, and the two support units are mutually supported by the cross bracing device, with the adjustable support buffering the deformation pressure of the foundation pit wall. Support units in the same direction are spliced ​​together. This invention provides an adjustable foundation pit engineering support structure, employing an adjustable support structure that forms a recoverable elastic support system between the support base plate and the support frame plate. After pressure is unloaded, it can return to its original shape, improving the durability and reusability of the support structure.

The utility model provides an operating platform for wall high-place operation, which comprises a main body frame, adjustable inclined supports and scaffold boards, the main body frame comprises four vertical rods distributed at four corners of a square, the upper parts, the middle parts and the lower parts of the four vertical rods are connected and fixed through cross beams, cross supports are further fixed among the vertical rods, and the scaffold boards are arranged on the cross supports. Scaffold boards are erected between the cross beams on the upper portion to form an operation platform, the adjustable inclined supports are obliquely arranged, the lower ends of the adjustable inclined supports are supported on the ground, the upper portions of the adjustable inclined supports are fixed to one side of the main body frame, and rod piece structures of the adjustable inclined supports are length-adjustable structures. The problems that a traditional scaffold is high in erecting safety risk, unstable in structure and the like are solved. Belongs to the field of building construction.

This utility model discloses an adjustable tilt angle photovoltaic support auxiliary support structure, including multiple sets of photovoltaic panels, multiple sets of concrete blocks, and a support frame cast and installed on top of the concrete blocks. A positioning frame is fixedly installed on the top of the support frame, and a flipping frame is mounted on the positioning frame. A set of support trusses is fixedly installed on the top of the multiple flipping frames. Two sets of auxiliary supports are fixedly installed on the flipping frames, and cross support frames are connected and installed through the auxiliary supports. The top of the cross support frames is connected to two other sets of support trusses. The photovoltaic panels are fixedly installed on the three sets of support trusses by multiple sets of clamping blocks, and multiple sets of connecting plates are welded to the bottom of the support trusses. This utility model can strengthen the interaction forces between the support trusses by the cross support frames when encountering wind resistance and snow pressure, increasing the stability of the photovoltaic panels while ensuring that the angle adjusted by the flipping axis remains unchanged, thus not affecting the sunlight-receiving area of ​​the photovoltaic panels.

The utility model relates to a lightweight tripod with multiple interfaces and high stability. Comprising a top disc (1), a plurality of supporting legs (2), a plurality of cross supporting beams (3), a cross supporting disc (4), a plurality of windproof pull ropes (5) and a plurality of cushion blocks (6). The top tray (1) is hinged with one end of each supporting leg (2); the top tray (1) is movably connected with one end of each windproof pull rope (5), and the other end of each windproof pull rope (5) is used for being fixed on the ground; the other end of each supporting leg (2) is fixedly connected with the corresponding cushion block (6); and one end of each transverse supporting beam (3) is hinged with the transverse supporting disc (4), and the other end of each transverse supporting beam (3) is hinged with the corresponding supporting leg (2). The tripod provided by the utility model adopts a structural form of combining the carbon fiber hollow tube and the metal structural member, is used for supporting a radar structure, and is rich in mounting interfaces and high in expandability.

The utility model relates to the technical field of sports equipment, in particular to a novel trampoline structure which comprises four supporting mechanisms and four connecting pieces, the connecting pieces are welded to the upper ends of the supporting mechanisms, and the connecting pieces are provided with threaded holes. The transverse rods are matched with the connecting pieces, the transverse rods are provided with connecting holes, the connecting holes are multiple in number, the connecting holes formed in the transverse rods are provided with fixing bolts in a matched mode, and the fixing bolts can penetrate through the connecting holes and are screwed into the threaded holes so as to fix the transverse rods and the connecting pieces; and the M-shaped reinforcing steel bars are welded on the inner sides of the cross rods and are used for connecting the trampoline surface. According to the novel trampoline structure, the stand columns are fixed through the expansion bolts, bottom transverse rods are reduced, meanwhile, internal cross supports are also reduced, installation is more convenient, the material cost, the machining cost and the construction cost are greatly reduced, and practicability is high.

The utility model discloses a double-row round pot support flower cultivation groove system which comprises a plurality of single-group cultivation grooves, each single-group cultivation groove comprises a plurality of vertical supporting round pipes arranged on a bottom plate, adjustable lead screws are longitudinally arranged in the vertical supporting round pipes in a penetrating mode, transverse supports are transversely installed on every two adjacent lead screws, and the transverse supports are connected with the vertical supporting round pipes in a penetrating mode. Round-basin-type supporting grooves are formed in the two ends of every two adjacent transverse supports in a lap joint mode, a plurality of round flowerpots are arranged in the round-basin-type supporting grooves, and drainage grooves are correspondingly formed in the positions below the round-basin-type supporting grooves and the round flowerpots. According to the technical scheme, the operation mode of bending down and bending back manually is avoided, the labor intensity is reduced, meanwhile, the land utilization rate is increased, the cultivation area of the facility is increased, and the planting density is improved; flowers are planted in the flowerpots on the cultivation grooves of the support, the planting height is increased, production operation is more convenient than that on the ground, and the labor intensity of operators is reduced. Therefore, the beneficial effects of improving the space utilization efficiency of the greenhouse and improving the production of the greenhouse are achieved.

The application discloses a temporary cross bracing device for an inner-inclined arch bridge and a construction method, and belongs to the technical field of bridge construction. The device comprises chord bars arranged side by side, a plurality of web bars arranged between the two chord bars, a movable end assembly arranged at one end of the two chord bars, the movable end assembly comprising a movable end mounting plate, square steel pipes arranged side by side in the middle of the movable end mounting plate, one end of the square steel pipes being fixed to the movable end mounting plate, two rectangular slides arranged in the end part of the chord bar, the other end of the square steel pipes being slidably connected to the rectangular slides, the square steel pipes and the chord bar not being relatively rotated, fixed plates symmetrically arranged on the end part of the chord bar, one end of the fixed plates being fixed to the end part of the chord bar, the other end of the fixed plates extending to the outside of the chord bar, and jacks arranged between the fixed plates and the movable end mounting plate. The technical scheme is used to simplify the supporting steps of the arch rib and improve the construction efficiency.

The utility model discloses a modularization assembly type cross staircase, relates to building structure field, including platform beam, ladder column and cross support staircase structure, four groups of ladder column and platform beam are spliced together, the platform beam is respectively connected between two ladder column along the horizontal direction, the cross support staircase structure is connected with the ladder column along the horizontal direction, and the cross support staircase structure is connected with the cross support staircase structure through the cross support staircase structure. The cross supporting stair structure is connected between the two opposite platform beams, and one side of the cross supporting stair structure is close to an existing building structure, so that a continuous up-and-down walking channel is formed; the cross support stair structure comprises inclined stair beams, step plates and U-shaped connecting pieces, and the step plates are limited between the two opposite inclined stair beams. The stair columns are additionally arranged, so that the overall structure of the stair is separated from an existing building structure, and follow-up movement and disassembly are facilitated.

The utility model relates to the technical field of aluminum alloy doors and windows, and discloses an aluminum alloy door and window with high wind pressure resistance, which comprises an aluminum alloy window frame, the inner wall of the aluminum alloy window frame is fixedly connected with glass, the outer surface of the aluminum alloy window frame is provided with a groove, and the inner wall of the groove is inserted with a damping strip. And one side surface of the damping strip is fixedly connected with a damping frame. Compared with the prior art, the shock-absorbing frame has the advantages that after the shock-absorbing strip is clamped into the groove, the adhesive layer is adhered to the surface of the aluminum alloy window frame, so that the shock-absorbing frame is fixed, the cross supporting frame corresponds to glass, the cross supporting frame has the turning degree, and the traceless adhesive layer is connected with the glass when the cross supporting frame is tightly attached to the glass; the cross supporting frame is fixed to the surface of the glass, supporting points of the glass are increased, shaking of the glass is reduced, the wind resistance is high, the glass stability is higher, fragmentation is avoided, safety is improved, the damping frame and the cross supporting frame can be taken down in windless weather, and the overall attractiveness is not affected.

The utility model relates to the technical field of building construction, and discloses a formwork structure for achieving integrated pouring of a concrete pipeline and a pipe base, which is used for laying the pipeline in a drainage channel and comprises a plurality of pipe pillows of a cuboid structure. The multiple pipe pillows are arranged in the direction perpendicular to the length direction of the drainage groove and are arranged at intervals in the length direction of the drainage groove, and through grooves used for bearing pipelines are formed in the tops of the pipe pillows; the multiple sets of formworks are arranged, each set of formworks comprises two formworks symmetrically arranged on the two sides of the pipeline in the length direction, and the ends of the formworks are tightly attached to the end faces of the pipe pillows at the corresponding positions; the number of the supporting pieces is multiple, and the supporting pieces are used for supporting all the formworks. The prefabricated concrete pipe sleeper is directly used as a formwork cross brace to replace a traditional cushion layer, the cushion layer pouring step is omitted, the construction period is shortened, and the material and labor cost is reduced.

A tub insert (10) for a top loading washing machine (12) having a cabinet (14) with a top opening (16), a lid (22), and a wash tub (18) disposed within the cabinet (14) may include a tub insert body (24) shaped to engage the cabinet (14) and the wash tub (18) when the tub insert body (24) is inserted through the top opening (16) to substantially prevent movement of the wash tub (18) relative to the cabinet (14). Cross-brace support panels (40) having cross-brace openings (50) extend from a top edge (46) of the tub insert body (24) upward through a gap (42) between the lid (22) and the cabinet (14) on opposite sides of the lid (22). The cross-brace openings (50) receive a cross-brace (120) that extends across the cabinet (14) to provide lateral support for a container (124) in which the washing machine (12) is shipped.

The utility model discloses a bed frame structure which comprises a bed frame and a support body. The bed frame comprises a bed head plate, a bed tail plate and two bed side plates, the two ends of each bed side plate are fixedly connected with the bed head plate and the bed tail plate respectively, and the bed head plate, the bed tail plate and the two bed side plates define a rectangular frame structure; the support body comprises a transverse support structure and a plurality of longitudinal supports arranged at intervals, end blocks are fixedly installed on the headboard and the footboard, side block structures are fixedly installed on the bed side boards, the two ends of the transverse support structure are in lap joint with the end blocks respectively, and the middles of the longitudinal supports are fixedly connected with the transverse support structure through middle connecting assemblies. The two ends of the longitudinal support are fixedly connected with the side block structures through end connecting assemblies correspondingly. The bed frame structure has the advantages of being capable of improving the bearing effect, stable in structure and convenient to install and use.

The utility model discloses a tunnel fan supporting structure suitable for high-altitude strong monsoon climate, and belongs to the technical field of tunnel ventilation. Comprising four stand columns, four lower transverse supports, two or more upper transverse supports and two top beams, and the top beams extend in the length direction of the base frame and are fixed to the top ends of the stand columns; a plurality of mounting beams corresponding to the positions of fan supporting legs are fixedly welded above the top beam in the width direction of the foundation framework; and the mounting beam is fixedly connected with an upper flanged plate. The device is mainly manufactured by welding the I-shaped steel and the channel steel, is convenient to manufacture, has a stable structure, and can well adapt to severe weather in high-altitude and strong monsoon climate regions; the fan is well supported, it is guaranteed that the fan can normally operate under the extreme weather condition, and the air quality in a tunnel is guaranteed.

The utility model discloses an engine test bed steel frame, including steel column, hanging column and horizontal support spare, the utility model with steel column as the core bearing component, forms horizontal rigid connection through the first frame beam, second frame beam and steel beam of adjacent steel column top installation, constitutes spatial grid system, sets up the cross support system link between second frame beam, promotes the structural lateral displacement resistance ability significantly, combines steel beam pre-arch technology, ensures the stability under the large -span working condition, and the hanging column forms three point restraint system through internal structure, and the accurate positioning of cooperation assembly jig frame realizes the stable transmission of engine hoisting load, and the horizontal support spare constitutes the composite stress system by the vertical installation second connecting rod and the connecting rod of different inclination angle arrangement, forms spatial truss effect, effectively resists the horizontal vibration when the engine operation, prevents the frame torsional deformation, and the overall structure has high precision, anti -dynamic load and long -life characteristics.

This utility model discloses a steel support frame connecting fastener, comprising: a pin for hinged cross bracing; a locking buckle for locking onto a steel column, the locking buckle having a strip-shaped adjustment hole extending horizontally; an ear seat connected to the locking buckle, one end of the ear seat having a hinge hole and the other end having a bolt hole; a bolt for fastening the connection; and a washer plate disposed between the ear seat and the locking buckle. This utility model provides a steel support frame connecting fastener that is manufactured in a factory and installed on-site. When erecting a steel support frame, the cross bracing is installed on-site, usually by welding: on-site welding easily causes air pollution and consumes manpower and resources, resulting in certain economic losses. This new steel support frame connecting fastener solves these problems by using a welding-free method.

The utility model relates to the technical field of feeding in the household industry, in particular to a workpiece stepping type lifting, overturning and conveying structure which comprises a first stand column, a second stand column, two vertical rods, a first transverse supporting frame, a second transverse supporting frame and an idle wheel installation base. The first stand column and the second stand column are connected with the vertical rods through first transverse supporting frames, the two vertical rods are connected through second transverse supporting frames, the first transverse supporting frames located on the upper portions and the lower portions of the first stand column and the second stand column are connected with first supports, a motor base is installed at the top end of the first stand column, and a bearing base B is installed at the top end of the second stand column. The structure is simple, a module single machine can be manufactured in a factory, field installation can be directly carried out, field installation is convenient, the installation efficiency is improved, time and labor are saved, the installation cost is reduced, accessories are standard parts, purchasing is easy, and the specification is single; the strength is good, damage is not prone to occurring, and the later maintenance workload and cost can be reduced.

The invention discloses an inward-inclined arch bridge temporary transverse supporting device and a construction method, and belongs to the technical field of bridge construction. Comprising chord members arranged side by side, a plurality of web members are arranged between the two chord members, one end of each chord member is provided with a movable end assembly, each movable end assembly comprises a movable end mounting plate, square steel pipes are arranged in the middle of each movable end mounting plate side by side, one ends of the square steel pipes are fixed to the movable end mounting plates, and the other ends of the square steel pipes are fixed to the movable end mounting plates. Two rectangular slideways are arranged in the end part of the chord member, the other end of the square steel tube is connected in the rectangular slideways in a sliding manner, the square steel tube and the chord member do not rotate relatively, fixed plates are symmetrically arranged on the end part of the chord member, one end of each fixed plate is fixed on the end part of the chord member, and the other end of each fixed plate is fixed on the rectangular slideways. The other end of the fixing plate extends towards the outside of the chord member, and a jack is arranged between the fixing plate and the adjustable end mounting plate. According to the technical scheme, the arch rib supporting steps are simplified, and the construction efficiency is improved.

The utility model discloses a device and lifting appliance for steel net frame vertical promotion belongs to steel net frame construction equipment technical field. The device for steel net frame vertical promotion, including lifting appliance and lifting point connecting piece, lifting appliance includes lifting appliance body and the two parallel arrangement's lug plate of fixed connection in the lower part of lifting appliance body, and lifting appliance body includes two opposite setting side plate, the cross bracing of welding between two side plates, two vertical bracing of interval welding on the upper portion of cross bracing, two ends of two vertical bracing are welded with two sides side plate respectively, and the steel strand hole is arranged in the middle portion of cross bracing, and two vertical bracing are located two sides of steel strand hole respectively, and cross bracing bottom has anchor tool rest space, and lug plate has pin hole, and lifting point connecting piece includes the lug plate of support and fixed connection on the support, and lifting appliance passes through the lug plate and the lug plate of lifting point connecting piece of its lug plate and is connected through pin shaft. The utility model effectively solved the traditional lifting appliance and cannot realize the difficult problem of steel net frame promotion.

The application discloses a use method of a large-cantilever cap beam telescopic full-enclosed protective device, which is composed of an I-shaped steel cross beam, a U-shaped frame, a trolley assembly, a cross bracing, an end cross rod, a long-side cross rod, a limiting pull rod, a limiting pin and a dense-mesh net; the U-shaped frame can slide on the lower flange plate of the I-shaped steel cross beam through the trolley assembly, the adjacent U-shaped frames are connected through the cross bracing and can be telescopic, and the outside is fully enclosed by the dense-mesh net; during use, the device is installed near a pier column, stretched to the cantilever end of the cap beam, retracted and disassembled after completion, and the whole process does not need to be operated without protection and traffic interruption above the auxiliary road, so that the device is safe, convenient, convenient in turnover, time-saving and cost-saving.

The invention discloses a construction method for excavation and backfilling of a pipe shed working chamber and a tunnel construction method, and relates to the technical field of tunnel construction. Excavating a pipe shed working chamber: excavating a first part close to the top of the tunnel, and reserving a part of core soil in the middle of the first part; expanding and excavating a pipe shed working chamber at the top of the first part; constructing a working chamber primary support at the periphery of the pipe shed working chamber; backfilling a pipe shed working chamber; excavating core soil; constructing a temporary cross brace; a tunnel primary support is constructed on the periphery of the first part, and a backfill cavity is defined by the tunnel primary support and the working chamber primary support; and concrete is pumped into the backfill cavity to form the protective arch. When the pipe shed working chamber is excavated, part of core soil is reserved, so that the stability of surrounding rock can be improved, the safety risk is reduced, the operation space is prevented from being occupied, and the construction efficiency is improved; when the pipe shed working chamber is backfilled, a support and a formwork do not need to be additionally erected, a secondary lining trolley does not need to be transformed, the construction cost is greatly reduced, and the construction period is shortened.

The utility model relates to workpiece clamping technical field, concretely relates to a workpiece clamping device, including cylinder top end bolt fixed support plate, pneumatic rod penetrates support plate center hole and its outside spiral groove is engaged with hole spiral thread, pneumatic rod top end internal thread groove spins into threaded rod, threaded rod radial outside screwing lock nut, top fixed connection cross bracing and briquetting; support plate surface is equipped with vertical separation long board and orthogonal separation short board, forms long support space and two groups of short support space, cylinder bottom end fixed bottom plate, and bottom plate is equipped with horizontal and longitudinal through -hole, adjusting screw rod selects one and then spins into sliding block top screw hole after penetrating horizontal or longitudinal through -hole, sliding block is embedded in fixed platform sliding groove, in operation spiral engagement drive pneumatic rod lifting rotation makes briquetting deflection, and rotating threaded rod independently adjusts briquetting height, and lock nut instant lock, and the selection horizontal through -hole drive sliding block horizontal translation switches horizontal support space, and longitudinal through -hole switches longitudinal orientation, makes support space dynamic reorganization.