33 results about "Beam length" patented technology

The invention discloses a composite beam plastic flexural capacity correction calculation method considering interface slippage. The method is suitable for a hogging moment area of a steel-concrete composite beam reinforced by an external prestress carbon fiber reinforced composite material rib. The method comprises the following steps: firstly, determining basic static boundary parameters and a shear connector constitutive model; in the iterative calculation, solving a temporary bearing capacity by utilizing an axial force and moment balance equation, and calculating interface slippage along the beam length and a deformation loss item at the support based on internal force distribution; then determining a rigidity degradation coefficient according to the average slip amount, and dynamically reducing the static yield bending moment to reconstruct the plastic hinge length; and finally, constructing a corrected deformation coordination equation, deducting a deformation loss item in geometric deformation calculation to obtain the real elongation of the in-vitro CFRP rib, and updating a stress parameter until a result is converged. According to the method, by introducing a deformation loss item and a rigidity degradation mechanism, deviation caused by traditional rigid connection assumption is corrected, and accurate prediction of the ultimate bearing capacity is achieved.

The present application relates to a kind of curved bridge PC precast beam pedestal and its wedge block adjusting device and construction method, pedestal includes concrete fixed pedestal, its both ends are provided with steel pedestal, steel pedestal includes beam length adjusting block, mobile pedestal, mobile pedestal end close to beam length adjusting block is provided with reserved notch, wedge block adjusting device is installed in this reserved notch, lower seat plate of wedge block adjusting device is fixed on the ground between two longitudinal tracks, the upper edge of apron is connected with the panel of mobile pedestal and beam length adjusting block, the lower surface of the panel of mobile pedestal and the panel of beam length adjusting block is attached to the upper side of the stop mortar pad plate outside apron, the ball hinge bolt is installed in the four corner positions of the upper seat plate and the lower seat plate of the wedge block adjusting device, and spherical support is provided in the center;The method is according to the steel pedestal part of beam length adjustment, after the wedge block adjusting device part is tightly blocked, concrete is poured;Before tensioning, lower lifting pedestal, avoid beam end splitting.

The utility model discloses a highway side slope drainage anchor rod frame beam, including crossbeam, longitudinal beam, transverse water intercepting rib, vertical water intercepting rib, drainage wedge and anchor rod, crossbeam and longitudinal beam perpendicular each other and form the grid frame beam main body fixed on the highway side slope, transverse water intercepting rib sets up on the crossbeam upper surface, and along crossbeam length direction extension, with crossbeam is integrative pouring and forms structure, vertical water intercepting rib sets up on the longitudinal beam upper surface, and along longitudinal beam length direction extension, with longitudinal beam is integrative pouring and forms structure, drainage wedge sets up in the higher side of crossbeam, and anchor rod one end anchors in the inside of side slope, and the other end passes through longitudinal beam and is fixed with longitudinal beam, and anchor rod along the grid edge of frame beam main body evenly distributes. This anchor rod frame beam structure, utilizes water intercepting rib and drainage wedge cooperation high -efficient drainage, can exclude the water in the frame, the surface precipitation on the frame beam body and part from the platform and scatter to the surface water in the frame beam body range, combines anchor rod steady support, effectively promotes the drainage capacity of anchoring side slope, strengthens its stability, guarantees the highway traffic safety.

This invention discloses a segmental precast steel pin diaphragm UHPC box girder and its construction method. The girder includes a UHPC box-shaped outer shell, within which are arranged multiple longitudinal structural steel bars extending along the beam length and spaced apart. Inside the UHPC box-shaped outer shell are multiple steel transverse diaphragms arranged at intervals along the beam length. The edges of the steel transverse diaphragms are fitted against the inner wall of the UHPC box-shaped outer shell. Multiple steel pin structures are connected to the steel transverse diaphragms to form steel pin-type diaphragms. Each steel pin structure is arranged at intervals along the edge of the steel transverse diaphragm and is embedded in the UHPC box-shaped outer shell, engaging with it. This segmental precast steel pin diaphragm UHPC box girder has the advantages of simple structure, low steel consumption, and low cost.

The utility model discloses a movable hanging basket, and belongs to the technical field of hanging baskets. A movable hanging basket comprises a folding hanging basket body, the folding hanging basket body is telescopically provided with a hanging piece used for being hung between the top walls of adjacent piece beams in the vertical direction, and a plurality of auxiliary supporting pieces making contact with the side walls of the adjacent piece beams are arranged on the two sides of the folding hanging basket body. Through the cooperative arrangement of the moving assembly and the auxiliary supporting piece, the hanging basket can stably move in the length direction of the sheet beam, the operation range of constructors is expanded, the constructors can easily conduct construction at different positions, the position of the hanging basket does not need to be frequently replaced, and therefore time and labor cost are saved, and construction efficiency is improved. The adjusting assembly is used for locking the moving assembly, it is ensured that the hanging basket can move according to requirements, the moving assembly can be locked and unlocked, and the stability and safety of the hanging basket are improved.

This application relates to the field of bridge engineering construction technology, and proposes a semi-prefabricated steel and UHPC shell prestressed continuous composite beam and its construction method. The semi-prefabricated steel and UHPC shell prestressed continuous composite beam includes: a continuous beam, including a positive bending moment zone and a negative bending moment zone; steel beams arranged along the entire length of the continuous beam, or only along the positive bending moment zone; a UHPC shell, located in the lower part of the negative bending moment zone; precast slabs, including precast slabs for the positive bending moment zone and precast slabs for the negative bending moment zone, applied to the upper part of the continuous beam; shear connectors, located on the upper flange of the steel beam; concrete, filling the interior of the UHPC shell; embedded parts, for connecting with the precast slabs in the negative bending moment zone; grouting connection zones, formed on the precast slabs and corresponding to the positions of the shear connectors and embedded parts; and prestressing tendons, arranged along the beam length of the continuous beam or only in the negative bending moment zone. This enables rapid, safe, and green construction of steel and concrete continuous composite beam bridges.

The utility model relates to the technical field of hoisting equipment, and discloses a modularized hoisting tool which comprises a main lifting hook, the main lifting hook is connected with a primary bearing beam through a main lifting rope, the bottom of the primary bearing beam is provided with a plurality of secondary bearing beams through auxiliary lifting ropes, and the secondary bearing beams are arranged at intervals in the length direction of the primary bearing beam. A hoisting rope is arranged at the bottom of each secondary bearing beam; according to the utility model, the hoisting efficiency can be improved, the quality can be ensured, the potential safety hazard during construction operation can be reduced, the installation operation cost is saved, the structure is simple, the operation is simple and convenient, and the practicability is strong.

The utility model discloses a counter-force device used for slant bearing capacity detection, which comprises a support, a counter-force beam, a ground anchor, a jack and a batter pile, the support comprises a first support mechanism and a second support mechanism, a set interval is arranged between the first support mechanism and the second support mechanism, the batter pile is arranged between the intervals, and the counter-force beam is connected with the ground anchor. The ground anchors are installed on the periphery of the first support mechanism and the periphery of the second support mechanism respectively in a supporting mode, one end of the counter-force beam in the length direction is installed on the first support mechanism in a rotating mode, the other end of the counter-force beam in the length direction is installed on the second support mechanism in a lifting mode in the vertical direction, and the jack is installed on a beam arm of the counter-force beam. And the jack and the inclined pile are leveled through a cushion block. The upper limiting rod and the lower limiting rod are used for fixing the left end of the counter-force beam, rotation of the counter-force beam at any angle is achieved by adjusting the height of the left end of the counter-force beam, and when the counter-force beam rotates to be parallel to the top face of the inclined pile, the jack is installed for inclined bearing capacity detection. Lifting of the screw rod can drive lifting of the left end of the counter-force beam, so that the detection requirements of different inclination angles are met, the defect that a pile body needs to be damaged in previous detection is overcome, and bearing capacity detection is more convenient and efficient.

The double-shaft positioning structure comprises X-axis guide rails and longitudinal beams, the two guide rails are arranged in the same vertical plane in parallel, the two longitudinal beams are arranged on the two X-axis guide rails in a sliding mode, T-shaped grooves are formed in the side faces, away from the X-axis guide rails, of the longitudinal beams in the length direction of the longitudinal beams, and sliding plates are arranged in the T-shaped grooves in a sliding mode. Connecting columns are fixedly arranged on the side faces, away from the X-axis guide rails, of the sliding plates. According to the double-shaft positioning structure and the towel rack, the towel rack body is arranged on the double-shaft positioning structure, the longitudinal beam of the double-shaft positioning structure can horizontally move along the X-shaft guide rail, the sliding plate for fixing the towel rack body can vertically move in the T-shaped groove of the longitudinal beam in the vertical direction, and when the towel rack is used, the towel rack body can be adjusted to a proper position; when the towel rack is not used, the towel rack body is lifted to be close to the ceiling position of a bathroom, space is not occupied, and collision with the towel rack is prevented.

A tensioned construction beam comprises a main longitudinal body defining a beam length and opposite longitudinal ends. The main longitudinal body includes a tubular part extending along the beam length and defining a cavity therein that is circumscribed by an inner wall of this tubular part. One or more steel cables extend within the cavity along the beam length and are embedded therein via grout filling the cavity. The one or more steel cables have been submitted to a tension force prior to being embedded and released from this tension force such that the tension force is applied to the main longitudinal body.

The utility model discloses a kind of end mould fixed subassembly, including end mould fixing part;End mould fixing part is along the longitudinal direction of end mould and is located at the outside of end mould, and is detachably connected with the end mould;The top of the end mould fixing part is respectively detachably connected with side mould back frame, and the bottom of the end mould fixing part is detachably connected with bottom mould.The utility model also discloses a formwork system comprising end mould fixed subassembly.The end mould fixed subassembly provided by the utility model can determine the connection position of end mould fixed subassembly and side mould back frame according to the length variation range of the beam to be prefabricated, satisfy the prefabricated construction of any beam length, ensure the accurate and reliable of end mould fixed position, and thus ensure the dimensional accuracy of beam body forming.

The utility model provides a prefabricated column connecting structure in a beam-column joint, and belongs to the field of fabricated buildings, the structure comprises an upper prefabricated column, a lower prefabricated column and a prefabricated beam, an anti-shearing piece is embedded in the end, close to the beam-column joint, of the prefabricated beam, and the prefabricated beam is at least provided with an anti-bending bottom bar, an anti-bending surface bar and a stirrup which are separated from the anti-shearing piece in the beam length direction; the anti-bending bottom bar is embedded in the bottom of the precast beam, the anti-bending surface bar is located on a post-cast laminated surface layer of the precast beam, and the stirrup is connected to the anti-bending surface bar and the anti-bending bottom bar; the prefabricated beam is arranged at the top of the lower prefabricated column through the shear-resistant piece, and the anti-bending bottom rib is fixed to the side portion of the lower prefabricated column; the upper prefabricated column is supported on the lower prefabricated column through the in-column main reinforcements of the upper prefabricated column and / or the in-column main reinforcements of the lower prefabricated column. Connection of the upper prefabricated column and the lower prefabricated column is achieved through mutual supporting in the beam column joints, visual inspection can be achieved, and the problems that grouting sleeve prefabricated columns are not accurate in alignment, not full in grouting and difficult to detect are thoroughly solved.

The present disclosure describes a microfabricated intravascular device configured for high axial strength, while the microfabricated intravascular device also maintains effective flexural flexibility. A pipe member includes a series of circumferentially extending rings that are interconnected by a series of axially extending beams. The transverse cutouts separate and define the rings. A series of axial cutouts are aligned with the beam and extend partially from the beam into the adjoining ring such that the beam length is nested partially within the axial length of the adjoining ring. This increases the functional length of the beam to provide flexural flexibility while still having sufficient ring structure to provide effective axial stiffness.

The present disclosure describes a microfabricated intravascular device configured for high axial strength while also maintaining effective bending flexibility. A tubular member includes a series of circumferentially extending rings interconnected by a series of axially extending beams. Transverse cuts separate and define the rings. A series of axial cuts are aligned with the beams and extend partially from the beams into the adjoining rings such that the beam length is partially nested within the axial length of the adjoining rings. This increases the functional length of the beams to provide bending flexibility while still having sufficient ring structure to provide effective axial stiffness.

This utility model discloses a high-speed railway single-track beam storage shared device that can be quickly converted, including a beam storage platform and a support structure set on the beam storage platform. The beam storage platform includes a double-track beam storage platform and a single-track beam storage platform set between the double-track beam storage platforms. It utilizes the space between the traditional double-track beam storage platforms. The supports are movably arranged on the top of the beam storage platform and grouped to support the bottom of the precast box girder. This allows the overall beam storage method to change from the traditional two sets of box girders to the parallel storage of three single-track box girders in a limited space. At the same time, it can adapt to changes in beam length and width, solve the beam storage problem of complex and numerous beam types in special beam yards, save land in precast beam yards, reduce construction costs, and improve economic efficiency. Moreover, the single-track beam storage platform is set higher than the double-track beam storage platform, which facilitates the subsequent retrieval of box girders on the single-track beam storage platform, reduces the possibility of wing plate collision during box girder hoisting, and improves the safety of box girder hoisting.

The utility model relates to the prefabricated beam production construction technical field, and disclose the prefabricated beam outer end adjustable formwork device of adapting beam length change, including main formwork frame, the both ends of main formwork frame are distributed with outer end formwork frame, the outer end formwork frame includes end frame, the outer wall of end frame is fixed with end support frame, the bottom of end support frame is fixed with end channel steel slide rail. The utility model discloses through main formwork frame and both ends outer end formwork frame composition, its outer end formwork frame can according to different prefabricated beam manufacturing demand carry out supplementary adjustment change, cooperate the both sides hydraulic tank drive of the end frame of both ends and carry, form both ends synchronous or separate unfolding regulation and control, along with end channel steel slide rail in the production site sliding adjustment telescopic, can match different beam length size, through hoist wedge block formwork and post splicing butt joint stability, form different adjustment length process, and the adjustment process does not need personnel frequent operation, saves manpower, promotes overall production efficiency.

The utility model relates to a kind of heat storage type fabricated building wall, including transverse support assembly, longitudinal support assembly, wall fixed between transverse support assembly and longitudinal support assembly;Transverse support assembly includes horizontal beam, and the top surface and bottom surface of horizontal beam respectively have chute being set along horizontal beam length direction;Longitudinal support assembly includes longitudinal beam, and the top end and bottom end of the side of longitudinal beam respectively extend with clamping plate;Two clamping plates form firm bayonet between them;Longitudinal beam is also provided with fixed plate at the position of firm bayonet;Longitudinal beam is used to be clamped in horizontal beam by firm bayonet, so that two clamping plates are located at the two sides of horizontal beam and are fixedly connected with horizontal beam, and fixed plate is located in chute and is fixedly connected with horizontal beam.The utility model uses horizontal beam and longitudinal beam and makes longitudinal beam can slide along horizontal beam length direction, can flexibly adjust the spacing between longitudinal beam, meet the demand of wall length and space size in actual construction, improve construction adaptability and efficiency.

The application discloses a kind of adjustable track box girder crash barrier elevation measurement methods, box girder is placed in the elevation measurement device of a kind of adjustable track box girder crash barrier designed to assist, the device includes rail, wedge steel plate, connecting steel bar, steel plate, reinforcing rib plate, anti-rollover support frame, the rail is directly anchored on measuring platform, the wedge steel plate is welded into a whole and placed on rail, the connecting steel bar is used to connect two sides wedge steel plate, the steel plate, reinforcing rib plate is directly welded to wedge steel plate bottom end, the anti-rollover support frame is welded to one side of wedge steel plate, the device can be adjusted support mechanism according to actual beam length and beam cross slope size, it is convenient to install, strong flexibility, easy to operate, high practicality, the elevation measurement method of a kind of adjustable track box girder crash barrier in the application is with the aid of rail platform, simplifies measurement procedure, saves the measurement time of box girder crash barrier elevation, improves work efficiency.

The utility model provides a prestressed concrete ribbed beam single-T plate, a prestressed concrete ribbed beam single-T plate group and a superposed beam-slab structure, and belongs to the field of fabricated buildings, the single-T plate comprises a ribbed beam and a panel, and at least a reinforcement cage, prestressed tendons and a pre-buried sleeve are arranged in the ribbed beam. Furthermore, the reinforcement cage comprises top ribs, bottom ribs and stirrups. The prestressed ribs are arranged between the bottom ribs and the top ribs along the beam length direction of the ribbed beams; the embedded sleeve is embedded in the end of the ribbed beam and located between the bottom rib and the top rib, and an additional shear resistant rib is assembled in the embedded sleeve. The ribbed beam is of a complete beam structure, and the reinforcement cage, the prestressed tendons and the pre-embedded sleeves are arranged in the ribbed beam, so that the structure of the ribbed beam is improved, and meanwhile, the tendons distributed at the two ends of the ribbed beam are staggered in a post-pouring space formed on the frame beam, and the safety and convenience of installation are achieved when the ribbed beam is opposite end to end.

The utility model relates to a kind of floating type trowelling assembly with light collecting function, the assembly includes the trowelling frame beam being arranged in parallel along frame beam length direction, its both ends are equipped with profiled support wheel, can abut the profiled ring outer circumferential wall of the both ends of wind power generation tower cylinder prefabricated formwork, provide radial positioning;Linear guide rail assembly is installed between the both ends of trowelling frame beam and frame vertical plate, so that trowelling frame beam can be freely slid in vertical direction, realize overall lifting floating;Horizontal moving lead screw is installed in parallel on trowelling frame beam, one end is connected drive motor, provides horizontal moving drive for trowelling head;Horizontal moving slider is equipped on horizontal moving lead screw, drives trowelling head horizontal movement;Trowelling head is connected to horizontal moving slider, and the surface of concrete segment is trowelled;Light collecting mechanism connected to the both sides of trowelling head carries out light collecting to the surface of trowelled concrete.The utility model effectively improves the quality and efficiency of concrete segment surface trowelling and light collecting operation, reduces manual labor intensity.

A fluidized bed treatment system includes a vessel having a vessel wall and a plurality of chemical feed distributors coupled to the vessel wall and extending into an interior volume of the vessel. Each of the chemical feed distributors includes a distributor body forming a chemical feed flow path and a plurality of chemical feed outlets. The fluidized bed treatment system also includes at least one intermediate beam having a plurality of slots spaced along a beam length. The intermediate beam is coupled to the vessel wall at both ends, each chemical feed distributor passes through one of the slots of the intermediate beam, and the intermediate beam provides vertical support for each of the plurality of chemical feed distributors. The fluidized bed treatment system can include lateral guides. The intermediate beam and the lateral guides vertically and laterally support the chemical feed distributors.

The utility model discloses a strip steel color coating anti -skidding device, including support beam and the distribution setting of multiple supporting and conveying strip steel's supporting roller along support beam length direction, at least the pressure roller of setting down strip steel in the upside of two supporting rollers, the end of pressure roller is installed on support beam through adjusting mechanism, pressure roller and supporting roller all include roller, the end piece of detachable installation in the end of roller and the antiskid layer of replaceable sleeve setting on the roller, the end piece is connected with support beam or adjusting mechanism through bearing seat, the utility model sets up multiple supporting rollers, and is provided with pressure roller above certain supporting roller, can adjust the force that the supporting roller, pressure roller exerted to strip steel through adjusting the position of pressure roller, under the condition that the friction coefficient is invariable, increases the resistance of strip steel relative pressure roller and supporting roller movement, reduces the probability of skidding in the strip steel conveying process.

Even at locations where the point cloud shape of the edge that represents a cross-sectional change cannot be obtained, the completed value of the slope protection structure can be accurately calculated. [Solution] The system includes a plane extraction means 105 that extracts a plane based on a normal vector, a plane separation means 106 that separates the plane into a slope frame portion and a bottom portion, a center point calculation means 107 that calculates a center point for each bottom portion that has been clustered with respect to the point cloud data of the bottom portion, a selection means 108 that generates a cross-sectional cluster for the point cloud data included in the cross-section that crosses vertically and horizontally from the center point and selects the cross-sectional slope frame portion and the cross-sectional slope bottom portion based on the average elevation, an extraction means 109 that extracts the cross-sectional slope frame portions in the left and right vicinity of the cross-sectional slope bottom portion that includes the center point, and a beam length calculation means 120 that calculates the midpoint of the extracted left and right vicinity cross-sectional slope frame portions and calculates the beam length based on the point cloud data included in the cross-section that includes a straight line connecting the multiple midpoints.

This invention discloses an adjustable beam reinforcement device, relating to the field of building engineering technology. It includes a support assembly and a telescopic assembly. The support assembly comprises multiple sets of side-by-side, spaced support seats. Two sets of support rods are symmetrically hinged to both ends of each support seat. One end of each support rod has a support member for contacting the beam formwork, and the other end is hinged to the support seat. The hinge axis is horizontal and perpendicular to the length direction of the support seat. The support seat has a first driving part that drives the support rod to rotate. The telescopic assembly comprises multiple sets of hinged rods, respectively arranged between adjacent sets of support seats. The intersection hinge points of the hinged rod sets are hinged to the support seats. The telescopic assembly adjusts the spacing between the support seats to accommodate the beam length. The first driving part drives the support rods to rotate, adjusting the support angle and position of the support members, so that multiple sets of support members symmetrically press against the beam formwork and provide balanced support force. This device can flexibly adjust the support length and angle to adapt to the reinforcement needs of beam formwork of different specifications.

The invention discloses a simply supported new and old concrete superposed beam deformation calculation method considering interface slippage. The method comprises the following steps: constructing a mechanical assumption model; the physical condition of the simply supported new and old concrete superposed beam is preset, a second-order ordinary differential equation of the interface relative slippage is constructed according to the support boundary condition of the simply supported new and old concrete superposed beam and the specific external load, the second-order ordinary differential equation is calculated, and a function of the interface relative slippage distributed along the beam length is obtained. Calculating an additional curvature based on a function of distribution of the interface relative slip along the beam length, performing double integration on the additional curvature function along the beam length of the simply supported new and old concrete superposed beam, and calculating deflection completely caused by the interface relative slip effect; and finally, superposing the deflection with the conventional deflection calculated based on the traditional complete shear connection theory to obtain the total deflection of the superposed beam finally considering the interface relative slip effect. The method has the advantage of calculating the deformation degree of the superposed beam.

The utility model discloses a CFRP cloth hoop concrete beam with clamping grooves. The CFRP cloth hoop concrete beam comprises CFRP longitudinal bars, CFRP cloth strips and the top transverse clamping grooves. The CFRP cloth strips replace traditional steel bar hoops, the top transverse buckles are pre-buried in a formwork, top CFRP longitudinal bars and the CFRP cloth strips can be well anchored, the CFRP cloth strips can be tightly combined with concrete, the CFRP cloth strips are arranged in a U shape in the beam length direction, the ends of the CFRP cloth strips are arranged in an X shape so as to resist large shearing force at the position of a support, crack development can be more effectively restrained through oblique arrangement, and the construction efficiency is improved. The shear resistance of the concrete beam is enhanced, and the weight reduction effect is achieved. Different from a common reinforced concrete structure, the durability of the structure is improved due to shear resistance of the CFRP cloth strips and fixation of the clamping grooves, the structure has the advantages of being light in weight and high in strength, meanwhile, construction processes such as steel bar binding are omitted, and the construction cost is saved.

The present application relates to a kind of expansion soil slope assembled continuous retaining wall structure, slope bottom is provided with the anchor rod along the width direction extension, length direction interval arrangement;Unit retaining wall along the length direction of slope is arranged to be integrated, and be connected with anchor rod;Slope top is provided with the slope top beam extending along length direction;Slope top beam and unit retaining wall are arranged unit frame beam connected head to tail between them, one end is elastically connected with unit retaining wall, the other end is on slope top beam, adjacent unit frame beam is also elastically connected;Unit retaining wall one end is provided with cable, cable extends and abuts on wall upper end, extends along unit frame beam length direction and cooperates, compared with traditional independent retaining wall, improve the resistance to sliding force of slope, guarantee the stability of slope bottom, can timely adjust internal stress distribution of structure, significantly improve the adaptability of retaining wall to periodic expansion and shrinkage of expansion soil, the abutting cooperation of cable can exert constraint tension on unit retaining wall, further improve the anti-overturning capacity of unit retaining wall.

The utility model relates to a kind of pneumatic reciprocating glue coating device, including rack, the rack has workbench, the workbench is equipped with beam striding on the workbench, the beam is equipped with a rodless cylinder along beam length direction arrangement, the slider of the rodless cylinder is equipped with support, the support bottom is equipped with glue coating head, the glue coating head is equipped with the hose of glue supply, the advantage and beneficial effect of utility model are in: pneumatic reciprocating glue coating device, mechanical scraping or spraying adhesive, realize automatic reciprocating glue coating, glue layer thickness is uniform, improve flocking quality.

The utility model discloses a lower vehicle frame supporting chain wheel protection device and engineering machinery. The lower vehicle frame supporting chain wheel protection device comprises a first protection device and a second protection device. The first protection device is composed of two first protection plates, and the two first protection plates are symmetrically connected to the longitudinal beam top plate in front of and behind the supporting chain wheel in the length direction of the longitudinal beam. The first protection plates on the two sides are of a wrapping type structure and protect the supporting chain wheels in the first protection plates. The second protection device is composed of two second protection plates, and the two second protection plates are symmetrically connected to the front portion and the rear portion of the chain supporting base in the length direction of the longitudinal beam. The second protection plates on the two sides are of a wrapping type structure and protect the supporting chain wheels in the second protection plates. The second protection plate is used for being matched with the supporting chain wheel where the first protection plate cannot be installed due to the small peripheral installation space. The supporting chain wheel can be effectively separated from solidified deposits such as soil and coal stones, normal operation of the supporting chain wheel is guaranteed, and the supporting chain wheel is not affected by accumulation of sundries such as the soil and the coal stones.

The utility model discloses a self-locking type turnover hanging beam which comprises a hanging beam body and a plurality of self-locking devices, the cross section of the hanging beam body is of a rectangular annular structure, a plurality of sets of notches extending downwards from the upper end face of the hanging beam body are oppositely formed in the two side walls in the length direction of the hanging beam body, and the self-locking devices are arranged on one sides of one set of notches respectively. And after the sling is arranged in the notch and falls into the bottom of the notch, the self-locking device limits the sling to move out of the notch. According to the self-locking type turnover hanging beam, the lock cylinder and the lock catch are additionally arranged in the hanging beam, the lock cylinder rotates through the self weight of a hung object, the lock cylinder rotates to touch the lock catch to limit rotation of the lock cylinder, self-locking is achieved, operation is easy, and applicability is high.