CN118376399B - Wharf door machine wind resistance testing device and testing method - Google Patents
Wharf door machine wind resistance testing device and testing method Download PDFInfo
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- CN118376399B CN118376399B CN202410806093.0A CN202410806093A CN118376399B CN 118376399 B CN118376399 B CN 118376399B CN 202410806093 A CN202410806093 A CN 202410806093A CN 118376399 B CN118376399 B CN 118376399B
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a wharf door machine wind resistance testing device and a testing method, wherein the device comprises a pressure testing device and two sets of connecting components, wherein the pressure testing device is arranged on a lifting platform; the lifting platform comprises a mounting seat which is arranged on the lifting and adjusting ground frame body; the pressure testing device comprises a movable ejector rod, a hydraulic jack, a weighing sensor and a fixed ejector rod which are coaxially arranged in sequence in the horizontal direction; the movable ejector rod and the fixed ejector rod are respectively penetrated to the outer side through holes formed at two ends of the mounting seat so as to respectively abut against the end wall of the travelling end of the door machine through two sets of connecting components; the testing device can rapidly and accurately position the pressure testing mechanism at a designated testing position, different testing thrust is applied by the pressure testing mechanism, and the numerical value can be monitored in real time, so that the wind resistance test of the gantry crane to different levels of wind power can be completed at one time, the corresponding testing method is simple and easy to control, the high-efficiency and rapid wharf gantry crane wind resistance test is realized, and an accurate testing result is obtained.
Description
Technical Field
The invention relates to the technical field of performance test of wharf operation equipment, in particular to a wharf door motor wind resistance test device and a wharf door motor wind resistance test method.
Background
The dock door machine is a common lifting device for a port, a rotatable lifting arm support is arranged on a door-shaped base running along a ground track, the dock door machine is provided with four mechanisms which work cooperatively, namely lifting, rotating, amplitude changing and running, a railway train or other vehicles can pass under the door seat, and loading and unloading of vehicles and ships and passing and direct taking operation can be carried out. Has the advantages of beautiful appearance, safe and reliable operation, advanced performance, convenient maintenance, durability and the like.
In actual use, the crane is often influenced by gusts, strong winds and typhoons, and the stability and the safety of the crane are seriously threatened, so that the crane can be overturned or the goods can be damaged, and even casualties are caused. Therefore, the method has important practical significance in experimental study on the tensile force of the gantry crane under the windproof condition. Through the experimental study of the wind-proof pulling force of the portal crane, the stability and the safety of the portal crane in strong wind weather are evaluated, safer working environments are provided for operators, and the risk of accidents is reduced.
Currently, a portal crane wind resistance test scheme is to select a loader as traction equipment, connect two sides of sea and land by using a steel wire rope, and simulate wind load actually born by the portal crane by the traction of the loader; however, the precision of the test scheme is not high, and the magnitude of the traction force cannot be accurately controlled; meanwhile, the uneven stress of the sea Liu Liangce is easily caused by the performance error of the steel wire rope, and the actual working condition of wind load is not met; from the safety point of view, the on-site operators have a certain danger under the influence of the breaking force of the steel wire rope. Therefore, it is necessary to address the above problems, and a specific device and a matching test method for the wind resistance test of the door machine are actually provided.
Disclosure of Invention
The invention aims to provide a wharf door machine wind resistance testing device for solving the technical problems.
The invention further aims to provide a testing method realized by the wind resistance testing device of the wharf door machine.
For this purpose, the technical scheme of the invention is as follows:
A dock door machine wind resistance testing device comprises a pressure testing device and two sets of connecting components, wherein the pressure testing device is arranged on a lifting platform; the lifting platform comprises a mounting seat which is arranged on the lifting and adjusting ground frame body; two ejector rod penetrating holes are symmetrically formed in the end walls at the two ends of the mounting seat in the length direction; the pressure testing device comprises a movable ejector rod, a hydraulic jack, a weighing sensor and a fixed ejector rod which are coaxially arranged in sequence in the horizontal direction; the movable ejector rod comprises a movable rod and a movable push plate; one end of the movable rod is arranged in a push rod penetrating hole in a penetrating way of the end wall of one end of the mounting seat in a penetrating way, and a fixing plate is vertically fixed on the end surface of the other end; the movable push plates are arranged on the adjacent sides of the fixed plates in parallel at intervals and fixedly connected through a plurality of bolts; the hydraulic jack is arranged in a way that a hydraulic push rod faces the movable push rod, a cylinder barrel of the hydraulic jack is fixed in the mounting seat, the front end of the hydraulic push rod is arranged in an opening in the movable push plate in a penetrating way, and the hydraulic jack is limited between the fixed plate and the movable push plate through a limiting ring arranged on the end wall of the front end of the hydraulic push rod so as to drive the movable push rod to reciprocate in the mounting seat through the hydraulic push rod; one end of the fixed ejector rod is penetrated in an ejector rod penetrating hole of the end wall of the other end of the mounting seat the other end is fixed in the mounting seat; the detection end of the weighing sensor and the other end opposite to the detection end are respectively abutted and fixed on the end face of the bottom end of the cylinder barrel of the hydraulic jack and the end face of the other end of the fixed ejector rod; the two sets of connecting components are respectively arranged on the end walls of the running ends of the gantry crane at the outer side rod ends of the movable ejector rod and the fixed ejector rod in a test state, so that the rod ends of the movable ejector rod and the fixed ejector rod are respectively abutted on the two sets of connecting components to apply specified thrust to the gantry crane.
Further, the lifting and adjusting ground frame body is provided with four lifting and adjusting mechanisms assembled on the supporting frame; the support frame comprises four support cylinders which are vertically arranged, so that four lifting adjusting mechanisms are respectively arranged in the four support cylinders; the four supporting cylinders are symmetrically arranged on two sides of the mounting seat in the length direction of the mounting seat and are directly or indirectly fixed on two sides of the mounting seat; the lifting adjusting mechanism comprises a ball screw, and consists of a screw rod vertically inserted into the supporting cylinder and a screw rod nut assembled on the screw rod, an annular boss is arranged on the inner wall of the supporting cylinder, and a connecting flange at the top end of the screw rod nut is pressed and fixed on the annular boss, so that the supporting cylinder can synchronously lift along with the screw rod nut in the vertical direction; the top end of the screw rod is fixed with an adjusting hand wheel, and the bottom end of the screw rod is rotatably arranged on a wheel frame provided with casters.
Further, at least one connecting beam is arranged between every two adjacent supporting cylinders.
Further, each of the bottom sides of each of the two supporting cylinders positioned at the two end sides of the length direction of the supporting frame is provided with a connecting beam, and a track positioning plate is arranged on the bottom surface of each connecting beam and positioned under the mounting seat; the rail positioning plate is vertically arranged, two protruding blocks are symmetrically arranged on the bottom surface of the rail positioning plate along the width direction of the supporting frame, the width between the two protruding blocks is matched with the width of two rail grooves on a wharf door machine walking rail, and the lifting platform is respectively embedded in the two rail grooves through the two protruding blocks on the rail positioning plate at the front end and the rear end of the lifting platform, so that the centering setting of the installation seat and the wharf door machine is realized.
Further, two guide rails are symmetrically fixed on the opposite side inner walls of the mounting seat corresponding to the reciprocating movement space of the movable ejector rod, and rail grooves of the two guide rails are horizontally arranged along the movement direction of the movable ejector rod and are oppositely arranged, so that the fixed plate and the movable push plate of the movable ejector rod are embedded in the rail grooves of the two guide rails and can reciprocate in the rail grooves along the horizontal direction.
Further, two ends of the cylinder barrel of the hydraulic jack are fixed in the mounting seats through at least two arc-shaped mounting seats; the fixed ejector rod is fixed in the mounting seat through at least two arc-shaped mounting seats.
Further, each set of door machine connecting assembly consists of a top seat and a buffer shield; the buffer protecting cover is an inverted U-shaped frame body sleeved outside the buffer column and fixed on the end wall of the walking end of the door machine, so that the buffer column is arranged in the buffer protecting cover, and the front end of the buffer column is exposed outside the buffer protecting cover; the top seat is a rigid shell with an opening at one side, is sleeved outside the buffer shield through the opening end, and has a gap with the buffer column on the inner wall of one side opposite to the opening end; the top seat is fixed on the buffer protective cover through bolt connection.
Further, at least two pairs of through connecting screw holes are correspondingly formed on the top surfaces of the top seat and the buffer shield, so that the top seat and the buffer shield are connected and fixed into a whole through bolts respectively penetrating through and screwed in each pair of connecting screw holes in a sleeved state; the bolt comprises a threaded rod and an annular handle fixed at the top end of the threaded rod.
The dock door machine wind resistance testing method realized by the dock door machine wind resistance testing device comprises the following steps:
S1, arranging a wharf portal crane wind resistance testing device at each of a sea side walking end and a land side walking end of a portal crane to be tested; the lifting table of the wharf door machine wind resistance testing device positioned at the sea side walking end is fixed on a sea side door machine walking track, and the rod end of the fixed ejector rod is abutted to the sea side walking end wall of the adjacent side door machine through a set of connecting components; the lifting table of the wharf portal crane wind resistance testing device positioned at the land side walking end is fixed on the land side portal crane walking track, and the rod end of the fixed ejector rod is abutted to the land side walking end wall of the adjacent side portal crane through a set of connecting components;
s2, determining test thrust to be applied by the hydraulic jack in the test process according to the model of the door machine to be tested and the wind power test requirement;
S3, keeping the land side walking end and the sea side walking end of the door machine to be tested in a parking movable state, and keeping the land side walking end and the sea side walking end of the adjacent door machine in a parking immovable state; the synchronous fixed extension of the two hydraulic jacks is controlled, the two driving movable ejector rods are abutted to the land side walking end and the sea side walking end of the door machine to be tested through the connecting component, and then test thrust is applied to the door machine to be tested; monitoring whether the test thrust applied by the two hydraulic jacks to the door machine to be tested is the same as the wind load corresponding to the test wind power in real time by using a weighing sensor; according to the test requirement, the test thrust is applied from small to large in sequence, and after each test thrust reaches a test value, 1 min-3 min is waited; observing whether the door machine to be tested has obvious slippage relative to the door machine walking track in the waiting process: 1) If the door machine to be tested has obvious slippage, the door machine to be tested cannot resist wind load corresponding to the test thrust; 2) If the door machine to be tested does not slide obviously, the door machine to be tested can resist wind load corresponding to the test thrust.
Further, the calculation formula of the test thrust force F required to be applied by the hydraulic jack in the test process is as follows:
Pw= C × Kh× q ×Aw，
F = 1/2Pw，
In the above two formulas, P w is the wind load acting on the port handling machinery or on the cargo, and the unit is cattle (N); c is the wind carrier type coefficient of the windward structure; k h is the wind pressure height change coefficient; q is wind pressure, which is determined according to wind speed, and a calculation formula of q=0.613×v 2;Aw is windward area along the track; f is the test thrust which should be applied by the jack in the wind resistance test device of the single dock door machine.
Compared with the prior art, the wharf door machine wind resistance testing device is designed based on the structural characteristics of the wharf door machine, the lifting platform can quickly and accurately position the pressure testing mechanism at a designated testing position, the pressure testing mechanism can apply different testing thrust according to a set value and can monitor the numerical value in real time, so that the door machine can finish wind resistance testing of different levels of wind power at one time, and the connecting assembly can realize the butt joint of the pressure testing device and the door machine on the premise of protecting a walking end buffer column of the door machine, so that the testing steps are simple and easy to control; furthermore, the wind resistance test method matched with the wind resistance test device of the wharf door machine can realize high-efficiency and rapid wind resistance test of the wharf door machine and obtain accurate test results.
Drawings
FIG. 1 is a schematic diagram of a split structure of a lifting platform and two sets of connecting components of a wharf door machine wind resistance testing device of the invention;
FIG. 2 is a schematic perspective view of a pressure testing device built in a mounting seat of a wharf door motor wind resistance testing device according to the present invention;
fig. 3 is a schematic top view structure diagram of a built-in pressure testing device of a mounting seat of the dock door machine wind resistance testing device and connection of the pressure testing device and external equipment;
FIG. 4 is a schematic diagram of a structure in which a single lifting adjusting mechanism in a lifting platform of a dock door machine wind resistance testing device of the present invention is matched with a supporting cylinder;
FIG. 5 is a schematic view of the assembly of the guide rail and the movable ejector rod of the dock door wind resistance testing device of the present invention;
FIG. 6 is a flow chart of a wind resistance test method implemented by the dock door wind resistance test device of the present invention;
Fig. 7 is a top view of the arrangement between the dock door wind resistance testing device and the dock door in the dock door wind resistance testing method of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and specific examples, which are in no way limiting.
Example 1
Referring to fig. 1, the dock door wind resistance testing device comprises a pressure testing device arranged on a lifting platform 1 and two door machine connecting assemblies.
Referring to fig. 1 and 2, the elevating platform 1 includes four elevating adjustment mechanisms assembled on a support frame, and a mount 103 for setting a pressure test apparatus, the mount 103 being height-adjusted by the four elevating adjustment mechanisms. Wherein,
The support frame comprises four vertically arranged support cylinders 101; the four supporting cylinders 101 are symmetrically arranged on two sides of the mounting seat 103 in the length direction of the mounting seat 103 and are directly or indirectly fixed on two sides of the mounting seat 103; the mounting seat 103 is a cubic strip-shaped box body with an opening at the top end; wherein, set up two ejector pins in the middle on the both ends end plates in box body length direction and worn to establish the hole, and the box body inner chamber is through two baffles along length direction interval setting, makes the box body inner chamber separate in proper order from one end to the other end has hydraulic pressure activity chamber, sensor installation cavity and fixed ejector pin installation cavity. In this embodiment, the upper part of each support cylinder 101 is fixedly connected to the side wall of the mounting seat 103 through a short connecting beam horizontally arranged, the upper parts of two support cylinders 101 located on the same side of the mounting seat 103 are fixedly connected through a long connecting beam 104 horizontally arranged, and the lower parts of every two support cylinders 101 are fixedly connected through a long connecting beam 104 horizontally arranged.
As a preferable technical solution of the present embodiment, two track positioning plates 106 are respectively provided centrally and symmetrically on the bottom surfaces of the long connecting beams 104 located at both end sides in the length direction of the support frame; the track locating plate 106 is a vertically arranged inverted trapezoid plate, two protruding blocks are symmetrically arranged on the bottom surface of the inverted trapezoid plate along the width direction of the support frame, the width between the two protruding blocks is matched with the width of two track grooves on a wharf portal crane walking track, and the two protruding blocks of the track locating plate 106 at the front end and the rear end of the lifting platform 1 are embedded in the two track grooves, so that the centering arrangement of the mounting seat 103 and the sea portal crane or the land portal crane is ensured.
The four lifting adjusting mechanisms are respectively arranged in the four supporting cylinders 101 so as to adjust the height of the supporting frame from the ground by utilizing the four lifting adjusting mechanisms; simultaneously, utilize four lift adjustment mechanism to adjust the support frame, can make the support frame also can satisfy the requirement of adjusting mount pad 103 to the horizontality on the subaerial having the inclination, or the rugged subaerial.
Referring to fig. 4, the lift adjustment mechanism includes a ball screw, a limiting plate 1023, an adjustment hand wheel 1024, a wheel carrier 1026, and casters 1027; wherein,
The screw 1022 of the ball screw is inserted centrally and vertically in the supporting cylinder 101; the adjusting handwheel 1024 is sleeved and fixed on the top end of the screw rod 1022 to facilitate manual rotation of the screw rod 1022; the limiting plates 1023 are sleeved on the upper side of the screw rod 1022 and are arranged below the adjusting handwheel 1024 at intervals, and the limiting plates 1023 are rotationally connected with the screw rod 1022 through rotating bearings; when the limiting plate 1023 is press-fit on the top end of the supporting cylinder 101, the lifting platform 1 is adjusted to the highest limiting position;
An annular boss 1011 matched with the screw nut 1021 is arranged on the inner wall of the supporting cylinder 101, and a plurality of screw holes are uniformly distributed on the annular boss along the circumferential direction; the top end of a screw nut 1021 of the ball screw is provided with a connecting flange which is press-fit on the annular boss and is fixedly connected with the annular boss through a plurality of bolts uniformly distributed along the circumferential direction, so that the supporting cylinder 101 can reciprocate along with the screw nut 1021 in the vertical direction;
Caster 1027 is mounted on wheel carrier 1026, bearing seat 1025 is mounted on the top of wheel carrier 1026, and the bottom end of lead screw 1022 is rotatably connected to wheel carrier 1026 by means of rotating bearing arranged in bearing seat 1025, so as to facilitate the movement of lifting platform 1; the wheel carrier 1026 is further provided with a brake mechanism for restricting rotation of the casters 1027, so that the position of the lift table 1 is not affected by the rolling of the casters 1027 during the pressure test, and is deviated.
Referring to fig. 2 and 3, the pressure testing device is centrally arranged in a mounting seat 103, and comprises a movable ejector rod 6, a hydraulic jack 4, a weighing sensor 5 and a fixed ejector rod 7 which are coaxially arranged in sequence; in this embodiment, the hydraulic jack 4 is preferably a 200t hydraulic jack and is matched with a hydraulic pump station assembly SQF-5310, and the weighing sensor 5 is preferably a Metretolterodine weighing sensor IND320L and is matched with a digital display screen capable of displaying force values in real time.
The movable ejector rod 6 and the hydraulic jack 4 are arranged in the hydraulic movable cavity; the movable ejector rod 6 comprises a movable rod 601 and a movable push plate 602; one end of the movable rod 601 is penetrated to the outer side of the mounting seat 103 from a push rod penetrating hole formed in the end wall of one end of the mounting seat 103, and a rectangular fixing plate is vertically fixed on the end surface of the other end; the movable push plate 602 is a plate body identical to the fixed plate, and is arranged in parallel with the fixed plate at intervals, and a through hole is formed in the center of the plate body; the movable push plate 602 and the fixed plate are connected and fixed into a whole through bolts and matched nuts 603 penetrating through four vertex angles of the movable push plate and the fixed plate.
The hydraulic jack 4 is arranged in a way that a hydraulic push rod faces the movable push rod 6, and two ends of a cylinder barrel of the hydraulic jack are fixed in a hydraulic movable cavity through two arc-shaped mounting seats 107; one end push rod of the hydraulic jack 4 is arranged in the central through hole of the movable push plate 602 in a penetrating way, a limiting sleeve 401 is sleeved and fixed on the outer wall of the rod end of the push rod, and the outer diameter of the limiting sleeve 401 is larger than the aperture of the central through hole of the movable push plate 602, so that the end push rod of the hydraulic jack 4 can directly push the movable rod 601 to move towards the outer side of the mounting seat 103 or pull the movable rod 601 to retract into the mounting seat 103 under the limiting cooperation of the limiting sleeve 401 of the rod end and the movable push plate 602.
The fixed ejector rod 7 is a fixed rod body arranged in the fixed ejector rod mounting cavity, one end of the fixed rod body is penetrated to the outer side of the mounting seat 103 through an ejector rod penetrating hole at the end side of the other end of the mounting seat 103, and the other end of the fixed rod body is penetrated in the sensor mounting cavity and an opening of a partition plate of the fixed ejector rod mounting cavity; preferably, the fixed carrier rod 7 is secured within the mount 103 by at least two arcuate mounts 107.
The weighing sensor 5 is arranged in the sensor mounting cavity, and the detection end and the other end opposite to the detection end are respectively abutted against the bottom end of the cylinder barrel of the hydraulic jack and the other end of the fixed ejector rod 7; specifically, a cylindrical connecting column is arranged at the center of the bottom end of the cylinder barrel opposite to the hydraulic push rod on the hydraulic jack 4, one end of the connecting column is welded and fixed at the center of the bottom end of the cylinder barrel, and the other end of the connecting column is penetrated in an opening of a spacing plate between the hydraulic movable cavity and the sensor mounting cavity and is abutted with the detection end of the weighing sensor 5; the other end of the weighing sensor 5 opposite to the detection end is fixed on the end face of the other end of the fixed ejector rod 7 through a screw.
As a preferred technical solution of this embodiment, referring to fig. 5, two guide rails 105 are symmetrically fixed on opposite side walls of the hydraulic cavity corresponding to the movable space of the movable ejector rod 6, the rail grooves of the two guide rails 105 are oppositely arranged and are opened along the moving direction of the movable ejector rod 6, and the shape and size of the rail grooves are adapted to the shape and size of the fixed plate (or the movable push plate 602), so that the fixed plate and the movable push plate 602 of the movable ejector rod 6 are embedded in the rail grooves of the two guide rails 105, and a guiding effect is provided for the reciprocating movement of the movable ejector rod 6.
Referring to fig. 1, two sets of door machine connecting components are respectively arranged at two sides of a lifting platform 1 when in use, and can be stored on a connecting beam positioned below a mounting seat 103 on the lifting platform 1 after the use; specifically, each set of connection assembly is composed of a top seat 2 and a buffer shield 3; wherein, the buffer shield 3 is fixed on the outer side of the buffer column 1002 of the travelling end 1001 of the door 10 in advance, and can not be dismantled after testing; the top chassis 2 is detachably assembled to the bumper cover 3.
The buffer shield 3 is a rigid shield body, and specifically is an inverted U-shaped frame body formed by a horizontally arranged top plate and vertical plates with top ends symmetrically fixed at two sides of the top plate, and is sleeved outside the buffer column 1002 and welded and fixed on the outer side wall surface of the traveling end 1001, so as to prevent the buffer column 1002 from being damaged due to high-altitude falling objects above the door 10, external equipment at two sides and vehicle collision; the width of the bumper guard 3 in the axial direction of the bumper post 1002 is smaller than the length of the bumper post 1002, so that the end of the bumper post 1002 can protrude outside the bumper guard 3 so as not to affect the anti-direct collision effect of the bumper post 1002 in the horizontal direction.
The top seat 2 is a rigid shell with an opening at one side, the shape and the size of the inner cavity of the shell are respectively matched with those of the buffer shield 3, so that the top seat 2 is sleeved outside the buffer shield 3, and a gap is reserved between the inner wall of the side opposite to the opening end and the buffer column, namely, the inner wall of the top seat 2 is not contacted with the buffer column 1002; the other side of the top seat 2 is fixed on the movable push rod 6 at the rod end of the movable rod 601 positioned at the outer side of the mounting seat 103, and specifically, the rod end of the movable rod 601 is centered and vertically fixed on the other side wall surface of the top seat 2;
Two top seat screw holes 201 are symmetrically formed in the top surface of the top seat 2, two shield screw holes 301 are symmetrically formed in the top surface of the buffer shield 3, when the top seat 2 is sleeved outside the buffer shield 3, the two screw holes on the top seat 2 are respectively communicated with the two screw holes on the buffer shield 3, and the two screw holes are respectively connected and fixed into a whole through bolts 202 which are respectively penetrated and connected in the two mutually communicated screw holes in a threaded manner; the bolt 202 is specifically composed of a threaded rod and an annular handle fixed at the top end of the threaded rod.
The design of the connecting component can protect the buffer column 1002 at the end side of the travelling end 1001 of the gantry crane 10 and simultaneously can realize the rapid and stable butt joint of the pressure testing device on the lifting platform 1 and the gantry crane 10.
Example 2
Referring to fig. 6 and 7, a dock door wind resistance testing method based on the dock door wind resistance testing device of embodiment 1 is applicable to weather conditions with wind power less than or equal to 4 levels.
The specific implementation steps of the dock door machine wind resistance test method are as follows:
s1, because the gantry crane comprises two walking ends respectively positioned on the sea side and the land side, before the gantry crane wind resistance test is carried out, a wharf gantry crane wind resistance test device is required to be respectively arranged on the sea side walking end and the land side walking end of the gantry crane 10 to be tested;
taking the sea side position as an example, the specific setting steps of the wind resistance testing device of each wharf door machine are as follows:
S101, installing a connecting assembly: welding and fixing a buffer shield 3 on the sea side walking end 1001 end walls of the door machine 10 to be tested and the adjacent side door machine 12, and centering a buffer column 1002 in the buffer shield 3; the top seat 2 is sleeved outside the buffer shield 3 and is fixed on the buffer shield 3 through two bolts 202;
S102, moving the lifting platform 1 onto the walking track 11, and embedding the bottom protrusions of the track positioning plate 106 into two track grooves of the walking track 11 to enable the center line of a pressure testing device in the lifting platform 1 to be positioned on the center connecting line of the two gantry cranes 10;
s103, adjusting the hand wheels of all lifting adjusting mechanisms on the lifting table 1 to enable the pressure testing device to be horizontally arranged, and enabling the movable ejector rod 6 and the same-side connecting assembly to be centrally arranged, wherein the fixed ejector rod 7 is abutted to the center of the end wall of the same-side connecting assembly;
s104, completing connection of the other wharf portal crane wind resistance testing device at the portal crane land side walking end in the same manner as the steps S101-S103;
S105, connecting the hydraulic jacks 4 of the two wharf door motor wind resistance testing devices with a field hydraulic pump station 8 through hydraulic pipelines so as to push the movable ejector rods 6 to be abutted on the same-side connecting assembly through the hydraulic jacks 4; the weighing sensors 5 of the two wharf door motor wind resistance testing devices are connected with a field digital display screen 9 through a data transmission line so as to monitor the thrust applied by the two hydraulic jacks 4 together in real time;
S2, determining a test thrust F to be applied by the hydraulic jack 4 in the test process according to the model of the door machine to be tested and the wind power test requirement;
Specifically, the calculation formula of the test thrust force is:
Pw= C × Kh× q ×Aw，
F = 1/2Pw，
In the above two formulas, P w is the wind load acting on the port handling machinery or on the cargo, and the unit is cattle (N); c is the wind carrier type coefficient of the windward structure; k h is the wind pressure height change coefficient; q is wind pressure, which is determined according to wind speed, and a calculation formula of q=0.613×v 2;Aw is windward area along the track; f is the test thrust which should be applied by the jack in the wind resistance test device of the single dock door machine.
S3, keeping the land side walking end and the sea side walking end of the door machine 10 to be tested in a standing movable state, and keeping the land side walking end and the sea side walking end of the adjacent door machine 12 in a standing immovable state so as to ensure that only the door machine 10 to be tested can be pushed and the adjacent door machine 12 cannot move all the way under the action of test thrust; the hydraulic pump station controls the synchronous stretching of the two hydraulic jacks 4, simultaneously monitors whether the test thrust applied by the two hydraulic jacks 4 to the door machine 10 to be tested is the same as the wind load corresponding to the test wind power by using the weighing sensor 5, sequentially applies the test thrust from small to large according to the test requirement, waits for 1 min-3 min after each test thrust reaches the test value, and observes whether the door machine 10 to be tested has obvious slippage relative to the door machine walking track 11 in the waiting process:
(1) If the door machine 10 to be tested has obvious slippage, the door machine 10 to be tested cannot resist wind load corresponding to test thrust;
(2) If the door machine 10 to be tested does not slide significantly, the door machine 10 to be tested can resist wind load corresponding to the test thrust.
In order to further prove the practicability of the wharf door machine wind resistance testing device and the testing method thereof, the applicant tests the wind resistance performance of the existing 25T door machine and 40T door machine of the wharf.
According to the door machine calculation book, the windward area a w of the 25T door machine along the track direction=rotating part+non-rotating part= 321.21m 2, and the windward area a w=241.82+137.73=379.55m2 of the 40T door machine along the track direction; according to the harbor mechanical wind load calculation rule, the wind load shape coefficient C takes a value of 1.08, and the wind pressure height change coefficient K h takes a value of 1.25; further, a simulated wind load value comparison table shown in table 1 below was calculated by the above method.
Table 1:
Based on wind load simulation values corresponding to different wind power levels shown in table 1, the wharf door machine wind resistance testing device is utilized to respectively test the wind resistance performance of the wharf 25T door machine and the wharf 40T door machine. The test results show that the 25T door machine can bear 12 wind levels at the highest, and the 40T door machine can bear 12 wind levels at the highest, which is the same as the result of the daily application of the two types of door machines.
Claims (8)
1. The wind resistance testing device of the wharf door machine is characterized by comprising a pressure testing device and two sets of connecting components, wherein the pressure testing device is arranged on a lifting platform (1); wherein, the lifting platform (1) comprises a mounting seat (103) which is arranged on the lifting and adjusting ground frame body; two ejector rod penetrating holes are symmetrically formed in the end walls of the two ends in the length direction of the mounting seat (103); the pressure testing device comprises a movable ejector rod (6), a hydraulic jack (4), a weighing sensor (5) and a fixed ejector rod (7) which are coaxially arranged in sequence in the horizontal direction; the movable ejector rod (6) comprises a movable rod (601) and a movable push plate (602); One end of the movable rod (601) is arranged in a push rod penetrating hole in the end wall of one end of the mounting seat (103) in a penetrating way, and a fixed plate is vertically fixed on the end surface of the other end; the movable push plates (602) are arranged on the adjacent sides of the fixed plates at intervals in parallel and are fixedly connected through a plurality of bolts; the hydraulic jack (4) is arranged in a way that a hydraulic push rod faces the movable push rod (6), a cylinder barrel of the hydraulic jack is fixed in the mounting seat (103), the front end of the hydraulic push rod is arranged in an opening in the movable push rod (602) in a penetrating way, and the hydraulic jack is limited between the fixed plate and the movable push rod (602) through a limiting sleeve (401) arranged on the end wall of the front end of the hydraulic push rod so as to drive the movable push rod (6) to reciprocate in the mounting seat (103) through the hydraulic push rod; One end of the fixed ejector rod (7) is arranged in an ejector rod penetrating hole in the end wall of the other end of the mounting seat (103) in a penetrating way, and the other end of the fixed ejector rod is fixed in the mounting seat (103); the detection end of the weighing sensor (5) and the other end opposite to the detection end are respectively abutted and fixed on the end face of the bottom end of the cylinder barrel of the hydraulic jack and the end face of the other end of the fixed ejector rod (7); the two sets of connecting components are respectively arranged on the end walls of the running ends of the gantry crane at the outer side rod ends of the movable ejector rod (6) and the fixed ejector rod (7) in a test state, so that the rod ends of the movable ejector rod (6) and the fixed ejector rod (7) are respectively abutted on the two sets of connecting components to apply specified thrust to the gantry crane; The lifting and adjusting ground frame body is provided with four lifting and adjusting mechanisms (102) which are assembled on the supporting frame; the bottom sides of every two supporting cylinders (101) positioned at the two ends of the supporting frame in the length direction are respectively provided with a connecting beam, and a track positioning plate (106) is arranged on the bottom surface of each connecting beam and positioned under the mounting seat (103); the rail positioning plate (106) is vertically arranged, two protruding blocks are symmetrically arranged on the bottom surface of the rail positioning plate along the width direction of the support frame, the width between the two protruding blocks is matched with the width of two rail grooves on a wharf portal crane walking rail, and the lifting platform (1) is respectively embedded in the two rail grooves through the two protruding blocks on the rail positioning plate (106) at the front end side and the rear end side of the lifting platform, so that the centering arrangement of the mounting seat (103) and the wharf portal crane is realized; The bottom of the lifting adjusting mechanism (102) is provided with a castor (1027); each set of door machine connecting component consists of a top seat (2) and a buffer shield (3); the buffer protecting cover (3) is an inverted U-shaped frame body sleeved outside the buffer column and fixed on the end wall of the walking end of the door machine, so that the buffer column is arranged in the buffer protecting cover (3), and the front end of the buffer column is exposed out of the buffer protecting cover (3); the top seat (2) is a rigid shell with an opening at one side, is sleeved outside the buffer shield (3) through the opening end, and has a gap with the buffer column on the inner wall of one side opposite to the opening end; the top seat (2) is fixedly connected to the buffer shield (3) through bolts.
2. The dock door machine wind resistance testing device according to claim 1, wherein the support frame comprises four vertically arranged support barrels (101), so that four lifting adjusting mechanisms (102) are respectively arranged in the four support barrels (101); the four supporting cylinders (101) are symmetrically arranged on two sides of the mounting seat (103) in the length direction of the mounting seat (103) and are directly or indirectly fixed on two sides of the mounting seat (103); the lifting adjusting mechanism comprises a ball screw, and consists of a screw rod (1022) vertically inserted into the supporting cylinder (101) and a screw rod nut (1021) assembled on the screw rod (1022), wherein an annular boss (1011) is arranged on the inner wall of the supporting cylinder (101), and a connecting flange at the top end of the screw rod nut (1021) is pressed and fixed on the annular boss (1011) so that the supporting cylinder (101) can synchronously lift along with the screw rod nut (1021) in the vertical direction; an adjusting hand wheel (1024) is fixed at the top end of the screw rod (1022), and the bottom end of the screw rod is rotatably arranged on a wheel frame (1026) provided with a castor (1027).
3. A quay door machine wind resistance testing device according to claim 2, characterized in that at least one connecting beam is arranged between every two adjacent support cylinders (101).
4. The device for testing the wind resistance of the wharf door machine according to claim 2, wherein two guide rails (105) are symmetrically fixed on opposite side inner walls of the mounting seat (103) corresponding to the reciprocating movement space of the movable ejector rod (6), and rail grooves of the two guide rails (105) are horizontally opened along the movement direction of the movable ejector rod (6) and are oppositely arranged, so that a fixed plate and a movable push plate (602) of the movable ejector rod (6) are embedded in the rail grooves of the two guide rails (105) and can reciprocate in the rail grooves along the horizontal direction.
5. The wharf door machine wind resistance test device according to claim 1, wherein the two ends of the cylinder barrel of the hydraulic jack (4) are fixed in the mounting base (103) through at least two arc-shaped mounting bases (107); the fixed ejector rod (7) is fixed in the mounting seat (103) through at least two arc-shaped mounting seats (107).
6. The wharf door machine wind resistance testing device according to claim 1, wherein at least two pairs of through connecting screw holes are correspondingly formed on the top surfaces of the top seat (2) and the buffer shield (3), so that the top seat (2) and the buffer shield are connected and fixed into a whole through bolts (202) respectively penetrating through and screwed in each pair of connecting screw holes in a sleeved state; the bolt (202) is composed of a threaded rod and an annular handle fixed at the top end of the threaded rod.
7. A method for testing the wind resistance of a dock door machine according to any one of claims 1 to 6, characterized by comprising the following steps:
S1, arranging a wharf portal crane wind resistance testing device at each of a sea side walking end and a land side walking end of a portal crane to be tested; the lifting table of the wharf door machine wind resistance testing device positioned at the sea side walking end is fixed on a sea side door machine walking track, and the rod end of the fixed ejector rod is abutted to the sea side walking end wall of the adjacent side door machine through a set of connecting components; the lifting table of the wharf portal crane wind resistance testing device positioned at the land side walking end is fixed on the land side portal crane walking track, and the rod end of the fixed ejector rod is abutted to the land side walking end wall of the adjacent side portal crane through a set of connecting components;
s2, determining test thrust to be applied by the hydraulic jack in the test process according to the model of the door machine to be tested and the wind power test requirement;
S3, keeping the land side walking end and the sea side walking end of the door machine to be tested in a parking movable state, and keeping the land side walking end and the sea side walking end of the adjacent door machine in a parking immovable state; the synchronous fixed extension of the two hydraulic jacks is controlled, the two driving movable ejector rods are abutted to the land side walking end and the sea side walking end of the door machine to be tested through the connecting component, and then test thrust is applied to the door machine to be tested; monitoring whether the test thrust applied by the two hydraulic jacks to the door machine to be tested is the same as the wind load corresponding to the test wind power in real time by using a weighing sensor; according to the test requirement, the test thrust is applied from small to large in sequence, and after each test thrust reaches a test value, 1 min-3 min is waited; observing whether the door machine to be tested has obvious slippage relative to the door machine walking track in the waiting process: 1) If the door machine to be tested has obvious slippage, the door machine to be tested cannot resist wind load corresponding to the test thrust; 2) If the door machine to be tested does not slide obviously, the door machine to be tested can resist wind load corresponding to the test thrust.
8. The method for testing the wind resistance of the wharf portal crane according to claim 7, wherein the calculation formula of the test thrust force F required to be applied by the hydraulic jack in the test process is as follows:
Pw = C × Kh× q ×Aw，
F = 1/2 Pw，
In the above two formulas, P w is wind load acting on port loading and unloading machinery or cargoes, and the unit is N; c is the wind carrier type coefficient of the windward structure; k h is the wind pressure height change coefficient; q is wind pressure, which is determined according to wind speed, and a calculation formula of q=0.613×v 2;Aw is windward area along the track; f is the test thrust which should be applied by the jack in the wind resistance test device of the single dock door machine.
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