CN109540574B - Large-scale door machine load test device and method - Google Patents
Large-scale door machine load test device and method Download PDFInfo
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- CN109540574B CN109540574B CN201910049245.6A CN201910049245A CN109540574B CN 109540574 B CN109540574 B CN 109540574B CN 201910049245 A CN201910049245 A CN 201910049245A CN 109540574 B CN109540574 B CN 109540574B
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- G—PHYSICS
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Abstract
The invention discloses a large-scale portal crane load test device and a method, wherein the device comprises a test main hanging bracket, an external sliding hanging bracket and a balance beam connected with an automatic grabbing beam of a portal crane, wherein a limiting mechanism is arranged at the bottom of the test main hanging bracket; the method comprises the following steps: 1. determining a test door machine; 2. installing an outer sliding hanger; 3. adding a test counterweight for the first time; 4. installing a balance beam; 5. installing an automatic grabbing beam of a balancing Liang Yumen machine and completing a first load test; 6. removing the balance beam; 7. adding the test counterweight again; 8. the balance beam is moved in and the next load test is completed; 9. the step six to the step eight are repeated for a plurality of times, and single-item and multiple different load tests are completed; 10. and replacing the test door machine, and circulating the second step. According to the invention, the two balance beams are designed to cooperate with the automatic grabbing beam of the door machine to carry out the load test action of the door machine, and the outer sliding hanging frame slides on the main testing hanging frame, so that the test requirements of different grabbing beam sizes are met, manual operation is not needed, and the working efficiency is high.
Description
Technical Field
The invention belongs to the technical field of door machine load tests, and particularly relates to a large-scale door machine load test device and method.
Background
The hydropower station hoist is a permanent device special for water conservancy and hydropower engineering, and is used for realizing the opening and closing of a gate and the lifting and placing of a trash rack. The type of the hoist can be divided into a fixed hoist, a movable hoist, a hydraulic hoist and a screw hoist, the load test is required to be carried out on the equipment before the equipment is formally used according to the standard requirement, particularly, the large-sized movable gantry crane and the large-sized hoist are generally rated to work at 300t to 600t, even the rated work load of the large-sized gantry crane reaches approximately 1000t, the static load test of 25%, 50%, 100% and 125% and the dynamic load test of 70%, 100% and 110% are required to be carried out according to the standard requirement, the test items are more, and the test balancing weights are required to be installed and removed on site for multiple times; in addition, the hydropower station is generally provided with a plurality of door machines and winches, so that the opening and closing of the gates with different requirements are met, and the experiment difficulty and the engineering quantity are increased.
When the existing power station is used for carrying out load test on a gantry crane and a winch with smaller tonnage, a steel wire rope is mostly used as a main lifting means for experiments, and for the gantry crane and the winch with larger tonnage, a mode of manufacturing an experiment hanging frame and installing a balancing weight is also adopted, but basically, the steel wire rope is still used as a lifting means. The load test work becomes a difficulty and an important point in the construction of the power station.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a large-scale portal crane load test device which is novel and reasonable in design, fully utilizes the automatic portal crane grabbing beams equipped when the portal crane opens and closes the gate, designs two balance beams to be matched with the automatic portal crane grabbing beams to carry out portal crane load test actions, and slides on a main test hanger through an external sliding hanger, thereby meeting the test requirements of different grabbing beam sizes, overcoming the defects and defects of the traditional steel wire rope as a hoisting means, avoiding manual operation, being convenient to construct, high in working efficiency and convenient to popularize and use.
In order to solve the technical problems, the invention adopts the following technical scheme: a large-scale door machine load test device which characterized in that: including being used for bearing test counter weight's experimental main hanger, install outside experimental main hanger outside the outer gallows that slides and install the compensating beam that just is connected with door machine automatic grab beam outside the outer gallows that slides, the stop gear who is used for prescribing a limit to the outer gallows that slides and remove the position is installed to the bottom of experimental main hanger, and the bottom of door machine automatic grab beam is provided with the compensating beam connecting pin, and the top of door machine automatic grab beam cooperates with the door movable pulley group, experimental main hanger is the cube frame, all install the bearing diagonal that the phase alternately laid on cube frame's the leading flank, trailing flank, left surface, right flank and the bottom surface, the top surface of cube frame is open structure, and the outer gallows that slides is established outside experimental main hanger including the cover and is slided the supporting hoop frame of top opening, the U-shaped supporting hoop frame that slides is slided, the U-shaped groove degree of depth of the supporting hoop frame that slides is greater than experimental main hanger, the top opening department of U-shaped supporting hoop frame installs two support locks that slides, the inboard interval that slides the supporting hoop is less than experimental main hanger's width, two support hoop frame that slides, two support hoop frame's width that slides and the top surface that slides that support frame that slides and the top surface that support frame are installed the side bolt that the side of the experimental hanger that the side of the support frame are connected with the main hanger.
The above-mentioned large-scale door machine load test device, its characterized in that: the balance beam comprises a balance beam main beam and two balance Liang Kazhuang grooves which are symmetrically arranged at two ends of the balance beam main beam respectively, a balance beam mounting hole matched with a balance beam connecting pin is formed in the middle of the balance beam main beam, the balance beam clamping grooves are U-shaped clamping grooves, openings of the two U-shaped clamping grooves are oppositely arranged, and a sliding support lock piece is clamped on the U-shaped clamping grooves.
The above-mentioned large-scale door machine load test device, its characterized in that: the number of the limiting mechanisms is three, the three limiting mechanisms are sequentially arranged at the bottom of the test main hanging frame along the length direction of the test main hanging frame, one of the three limiting mechanisms is arranged at the middle position of the bottom of the test main hanging frame, and the remaining two limiting mechanisms of the three limiting mechanisms are respectively arranged at two ends of the test main hanging frame.
The above-mentioned large-scale door machine load test device, its characterized in that: the number of the outer sliding hanging frames is two, the number of the balance beams is equal to the number of the outer sliding hanging frames and corresponds to the number of the outer sliding hanging frames one by one, and the outer sliding hanging frames are arranged at the positions, between the two adjacent limiting mechanisms, of the main testing hanging frames.
The above-mentioned large-scale door machine load test device, its characterized in that: the top surface of the cube frame is provided with a movable connecting piece along the width direction, the movable connecting piece comprises two connecting rod installation seats and a movable connecting rod installed between the two connecting rod installation seats, and the movable connecting rod is fixedly connected with the connecting rod installation seats through a connecting rod locking pin.
Meanwhile, the invention also discloses a method for testing the load of the large-scale portal crane, which has simple steps and reasonable design and meets the test requirements of different grab beam sizes, and is characterized in that: the method comprises the following steps:
step one, determining a test door machine: selecting a door machine to be tested on a construction site according to a test arrangement rule;
step two, mounting an external sliding hanger: three limiting mechanisms are sequentially arranged at the bottom of the test main hanging frame along the length direction of the test main hanging frame, one of the three limiting mechanisms is arranged at the middle position of the bottom of the test main hanging frame, the remaining two limiting mechanisms of the three limiting mechanisms are respectively arranged at two ends of the test main hanging frame, two outer sliding hanging frames are arranged outside the test main hanging frame, and the two outer sliding hanging frames and the three limiting mechanisms are distributed at intervals;
step three, adding a test counterweight for the first time: adding a test counterweight into the test main hanging frame from the top opening of the test main hanging frame by using a crane until the counterweight required by the first load test is reached;
step four, installing a balance beam: each external sliding hanger is provided with a balance beam, each balance beam comprises a balance beam main beam and two balance Liang Kazhuang grooves which are symmetrically arranged at two ends of the balance beam main beam respectively, a balance beam mounting hole matched with a balance beam connecting pin is formed in the middle position of the balance beam main beam, each balance beam clamping groove is a U-shaped clamping groove, openings of the two U-shaped clamping grooves are oppositely arranged, and sliding support locking pieces are clamped on the U-shaped clamping grooves;
step five, installing an automatic grabbing beam of a balancing Liang Yumen machine and completing a first load test: the interval between the two outer sliding hanging frames is adjusted, so that the balance beams on the two outer sliding hanging frames are fixedly connected with balance beam connecting pins arranged on an automatic grabbing beam of a door machine to be tested, and a single first load test is carried out;
step six, removing the balance beam: the outer sliding hanging frame is kept motionless, the height position of the automatic grabbing beam of the gantry crane is unchanged, and the automatic grabbing beam of the gantry crane is utilized to drive the balance beam to slide out of the main testing hanging frame along the horizontal direction;
step seven, adding the test counterweight again: continuously adding a test counterweight into the test main hanging frame by using the crane until the counterweight required by the next load test is reached;
step eight, the balance beam is moved in and the next load test is completed: the outer sliding hanging frames are kept motionless, the height position of the automatic grabbing beam of the gantry crane is unchanged, the automatic grabbing beam of the gantry crane is utilized to drive the balance beams to slide into the test main hanging frames along the horizontal direction until the two balance beams are respectively matched with the two outer sliding hanging frames, the central axis of the balance beams is kept to coincide with the central axis of the outer sliding hanging frames, and a single next load test is carried out;
step nine, circulating the step six to the step eight for multiple times to finish single-item multiple different load tests;
step ten, replacing a test door machine: and (3) separating the automatic grabbing beam of the gantry crane from the balance beam connecting pin, replacing a new test gantry crane according to a test arrangement rule, and recycling the second step after taking the automatic grabbing beam of the gantry crane on the new test gantry crane as the automatic grabbing beam of the gantry crane to be tested.
The method is characterized in that: the multiple different load tests include static load tests of 25%, 50%, 100% and 125% of rated workload of the large door machine, and dynamic load tests of 70%, 100% and 110% of rated workload of the large door machine.
The method is characterized in that: when the required counterweight of the load test exceeds 50% of rated working load of the large-sized door machine, a movable connecting piece is required to be installed on the top surface of the cube frame along the width direction, and comprises two connecting rod installation seats and a movable connecting rod installed between the two connecting rod installation seats, and the movable connecting rod is fixedly connected with the connecting rod installation seats through a connecting rod locking pin.
Compared with the prior art, the invention has the following advantages:
1. according to the test device, the test main hanging frame is designed to bear the test counterweight, so that the increase and the decrease of the test counterweight are conveniently realized, the defects and the defects of the traditional steel wire rope as a hoisting means are overcome, the test device can be reused, the requirement that the rated working load of a large-sized door machine reaches approximately 1000t is met, the potential safety hazard is small, the test device has strong universality, the resource waste is avoided, the test main hanging frame is a cube frame, inclined supports which are arranged in a crossing manner are arranged on the front side surface, the rear side surface, the left side surface, the right side surface and the bottom surface of the cube frame, the strength of the cube frame is ensured, the top surface of the cube frame is the inlet and the outlet of the test counterweight with an open structure, and the test device is convenient to popularize and use.
2. According to the test device, the outer sliding hanging frames are arranged outside the cube frame, so that sliding is conveniently carried out along the length direction of the cube frame, the distance between the two outer sliding hanging frames is adjusted, the test device is suitable for grab beams with different sizes, the sliding supporting hoop frame adopts the U-shaped sliding supporting hoop frame with the top opening, the test counterweight is not blocked from entering and exiting while the cube frame is borne, the test counterweight is conveniently increased, the outer sliding hanging frames are prevented from being detached, the test procedure is reduced, the U-shaped groove depth of the U-shaped sliding supporting hoop frame is larger than the height of the main test hanging frame, and after the sliding supporting locking piece is installed, the limit of the sliding supporting locking piece on the cube frame can be realized, and meanwhile, the roller is conveniently installed; the outside interval of two support locks that slide is greater than the width of support hoop frame that slides, realizes that support locks that slide is protruding structure than cube frame, is convenient for cooperate with the compensating beam.
3. According to the test device adopted by the invention, the door machine automatic grab beams arranged when the door machine opens and closes the gate are fully utilized, the two balance beams are designed to be matched with the door machine automatic grab beams to carry out the door machine load test action, and the door machine movable pulley block, the door machine automatic grab beams and the balance beams form a whole in the actual test, so that the test device is reliable and stable, and in the process of installing and dismantling the test counter weight for each test item, the door machine cart is fully utilized to complete the test, so that the automation degree is high, the labor intensity of field workers is greatly reduced, and the construction is efficient.
4. The method has the advantages that the steps are simple, the distance between the two outer sliding hanging brackets is adjusted according to the size of the door machine to be tested, the balance beams on the two outer sliding hanging brackets are matched with the balance beam connecting pins arranged on the automatic grabbing beam of the door machine to be tested, the test counterweight is added or taken out from the top opening of the main testing hanging bracket by using the crane, manual operation is not needed, the construction is convenient, the balance Liang Yumen movable pulley block and the automatic grabbing beam of the door machine are installed into a whole, the balance beams are driven by the automatic grabbing beam of the door machine to slide out or slide in along the horizontal direction, different load tests are completed, the working efficiency is high, the defects and defects of the traditional steel wire rope serving as a lifting means are overcome, and the method is convenient to popularize and use.
In summary, the invention has novel and reasonable design, fully utilizes the automatic grabbing beams of the gantry crane, which are arranged when the gantry crane opens and closes the gate, designs two balance beams to be matched with the automatic grabbing beams of the gantry crane to carry out the load test action of the gantry crane, and slides the outer sliding hanging frame on the main hanging frame for testing, thereby meeting the test requirements of different grabbing beam sizes, discarding the defects and defects of the traditional steel wire rope as a hoisting means, needing no manual operation, having convenient construction, high working efficiency and being convenient for popularization and use.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of the structure of the test device of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic structural view of the balance beam of the present invention.
Fig. 4 is a cross-sectional view A-A of fig. 1.
FIG. 5 is a schematic diagram of the mounting relationship of the external slip hanger of the present invention to a test main hanger.
Fig. 6 is a schematic view of the structure of the invention for adding test weights.
FIG. 7 is a schematic view of the installation relationship of the balance beam, the movable connecting piece and the external sliding hanger.
Fig. 8 is a schematic diagram of the installation relationship of the automatic grabbing beam of the balancing Liang Yumen machine.
Fig. 9 is a schematic view of the removal of the balance beam according to the present invention.
Fig. 10 is a schematic view of the balance beam of the present invention.
FIG. 11 is a method flow diagram of the method of the present invention.
Reference numerals illustrate:
1-a door motor movable pulley block; 2-automatic beam grabbing of the door machine; 3-balance beam connecting pins;
4, balancing beams; 4-1, a balance beam main beam; 4-2, a balance beam mounting hole;
4-3-balancing Liang Kazhuang slots; 5-an external sliding hanger; 5-1-a slip support lock;
5-2-a slip support hoop frame; 5-3-idler wheels; 5-4, fastening bolts;
6, testing a main hanging bracket; 7, a movable connecting piece; 7-1, connecting rod mounting seats;
7-2, a movable connecting rod; 7-3, connecting rod locking pin; 8-test counterweights;
9-a limiting mechanism; 10-a crane.
Detailed Description
As shown in fig. 1 to 4, the large-scale portal crane load test device of the invention comprises a test main hanger 6 for bearing a test counterweight 8, an outer sliding hanger 5 arranged outside the test main hanger 6 and a balance beam 4 arranged outside the outer sliding hanger 5 and connected with a portal crane automatic grab beam 2, wherein a limiting mechanism 9 for limiting the moving position of the outer sliding hanger 5 is arranged at the bottom of the test main hanger 6, a balance beam connecting pin 3 is arranged at the bottom of the portal crane automatic grab beam 2, the top of the portal crane automatic grab beam 2 is matched with a portal crane movable pulley block 1, the test main hanger 6 is a cube frame, inclined supports which are arranged in a crossing way are arranged on the front side surface, the rear side surface, the left side surface, the right side surface and the bottom surface of the cube frame, the top surface of the cube frame is an open structure, the outer sliding hanging frame 5 comprises a sliding supporting hoop frame 5-2 sleeved outside the test main hanging frame 6, the sliding supporting hoop frame 5-2 is a U-shaped sliding supporting hoop frame with an opening at the top, the depth of a U-shaped groove of the U-shaped sliding supporting hoop frame is larger than the height of the test main hanging frame 6, two sliding supporting locking pieces 5-1 are installed at the position of the opening at the top of the U-shaped sliding supporting hoop frame, the inner side distance of each sliding supporting locking piece 5-1 is smaller than the width of the test main hanging frame 6, the outer side distance of each sliding supporting locking piece 5-1 is larger than the width of the corresponding sliding supporting hoop frame 5-2, rollers 5-3 which are in butt joint with the top surface of the test main hanging frame 6 are installed on the bottom surface of each sliding supporting hoop frame 5-1, and fastening bolts 5-4 connected with the side surface of the test main hanging frame 6 are installed on the side surfaces of each U-shaped sliding supporting hoop frame.
It should be noted that, by designing the test main hanging frame 6 for bearing the test counterweight 8, the increase and the decrease of the test counterweight 8 are facilitated, the defects and the defects of the traditional steel wire rope as a hoisting means are overcome, the steel wire rope can be reused, the requirement that the rated work load of the large-sized door machine reaches approximately 1000t is met, the potential safety hazard is small, the test device has strong universality, the resource waste is avoided, the test main hanging frame 6 is a cube frame, the front side surface, the rear side surface, the left side surface, the right side surface and the bottom surface of the cube frame are all provided with inclined supports which are arranged in a crossing way, the strength of the cube frame is ensured, and the top surface of the cube frame is the inlet and outlet of the test counterweight with an open structure; the outer sliding hanging frame 5 is arranged outside the cube frame, so that sliding is conveniently carried out along the length direction of the cube frame, the distance between the two outer sliding hanging frames is adjusted, the device is suitable for grabbing beams of different sizes, time and labor are saved, the operation is simple, the sliding supporting hoop frame 5-2 adopts a U-shaped sliding supporting hoop frame with an opening at the top, the cube frame is supported, meanwhile, the test counterweight 8 is not hindered from entering and exiting, the test counterweight 8 is conveniently increased and decreased, the outer sliding hanging frame 5 is prevented from being detached, the test procedure is reduced, the U-shaped groove depth of the U-shaped sliding supporting hoop frame is larger than the height of the main test hanging frame, the limit of the sliding supporting locking piece 5-1 on the cube frame can be realized after the sliding supporting locking piece 5-1 is ensured to be installed, and meanwhile, the idler wheels 5-3 are conveniently installed; the outer side distance between the two sliding support locking pieces 5-1 is larger than the width of the sliding support hoop frame 5-2, so that the sliding support locking pieces 5-1 are of a protruding structure compared with a cubic frame and are convenient to be matched with the balance beam 4, the side surface of the U-shaped sliding support hoop frame is provided with fastening bolts 5-4 connected with the side surface of the test main hanging frame 6, the outer sliding hanging frame 5 and the test main hanging frame 6 are fixed into a whole, and meanwhile, the shearing force at the top of the test main hanging frame 6 is increased, so that the deformation of the test main hanging frame 6 is avoided; through the automatic grab beam 2 of door machine that makes full use of door machine when opening and close the gate, design two compensating beams 4 and the automatic grab beam 2 cooperation of door machine carry out door machine load test action, during the actual test, door machine running block 1, the automatic grab beam 2 of door machine and compensating beam 4 three form a whole, reliable stability, in every test item installation test counter weight 8 and demolish test counter weight 8 in-process, the completion test of whole utilization door machine cart, degree of automation is high, field worker's intensity of labour has been reduced greatly, the construction is high-efficient.
In this embodiment, the balance beam 4 includes a balance beam main beam 4-1 and two balance beam clamping grooves 4-3 symmetrically installed at two ends of the balance beam main beam 4-1, a balance beam installation hole 4-2 matched with the balance beam connecting pin 3 is provided at the middle position of the balance beam main beam 4-1, the balance beam clamping grooves 4-3 are U-shaped clamping grooves, openings of the two U-shaped clamping grooves are oppositely arranged, and the sliding support lock piece 5-1 is clamped on the U-shaped clamping grooves.
It should be noted that, the purpose of the balance beam mounting hole 4-2 being formed in the middle position of the balance beam main beam 4-1 is to ensure the balance between the automatic grabbing beam 2 of the gantry crane and the operation of the balance beam 4, and the openings of the two U-shaped clamping grooves are arranged oppositely and are respectively clamped and combined with the two sliding support locking pieces 5-1, so as to realize the grabbing and lifting of the external sliding hanging frame 5, and further realize the grabbing and lifting of the test main hanging frame 6 and the test counterweight.
In this embodiment, the number of the limiting mechanisms 9 is three, the three limiting mechanisms 9 are sequentially installed at the bottom of the test main hanging frame 6 along the length direction of the test main hanging frame 6, one limiting mechanism 9 of the three limiting mechanisms 9 is installed at the middle position of the bottom of the test main hanging frame 6, and the remaining two limiting mechanisms 9 of the three limiting mechanisms 9 are respectively installed at two ends of the test main hanging frame 6.
In this embodiment, the number of the outer sliding hangers 5 is two, the number of the balance beams 4 is equal to the number of the outer sliding hangers 5 and corresponds to one another, and the outer sliding hangers 5 are arranged at the positions of the test main hangers 6 between the two adjacent limiting mechanisms 9.
It should be noted that, the purpose of designing the number of the limiting mechanisms 9 to be three is to halve the test main hanging frame 6, and install two outer sliding hanging frames 5 on the test main hanging frame 6 after halving respectively, and the purpose of installing one limiting mechanism 9 in the three limiting mechanisms 9 in the intermediate position of the bottom of the test main hanging frame 6 is to avoid any one outer sliding hanging frame 5 in the two outer sliding hanging frames 5 to exceed the central line and increase the adjustment complexity of the outer sliding hanging frame 5, and the purpose of installing the remaining two limiting mechanisms 9 in the three limiting mechanisms 9 at the two ends of the test main hanging frame 6 respectively is to avoid the two outer sliding hanging frames 5 to slide out of the test main hanging frame 6, thereby causing potential safety hazards.
In this embodiment, the top surface of the cubic frame is provided with a movable connecting piece 7 along the width direction, the movable connecting piece 7 comprises two connecting rod mounting seats 7-1 and a movable connecting rod 7-2 arranged between the two connecting rod mounting seats 7-1, and the movable connecting rod 7-2 is fixedly connected with the connecting rod mounting seats 7-1 through a connecting rod locking pin 7-3.
It should be noted that, the number of the movable connecting pieces 7 is designed and installed according to actual needs, and the top surface of the cube frame is tensioned along the width direction by using the movable connecting rod 7-2, so as to play a role in reinforcing the strength and rigidity of the cube frame.
The method for testing the load of the large-scale portal crane as shown in fig. 5 to 11 comprises the following steps:
step one, determining a test door machine: selecting a door machine to be tested on a construction site according to a test arrangement rule;
step two, mounting an external sliding hanger: three limiting mechanisms 9 are sequentially arranged at the bottom of the test main hanging frame 6 along the length direction of the test main hanging frame 6, one limiting mechanism 9 of the three limiting mechanisms 9 is arranged at the middle position of the bottom of the test main hanging frame 6, the remaining two limiting mechanisms 9 of the three limiting mechanisms 9 are respectively arranged at two ends of the test main hanging frame 6, two outer sliding hanging frames 5 are arranged outside the test main hanging frame 6, and the two outer sliding hanging frames 5 and the three limiting mechanisms 9 are distributed at intervals;
step three, adding a test counterweight for the first time: adding the test counterweight 8 into the test main hanging frame 6 from the top opening of the test main hanging frame 6 by using a crane 10 until reaching the counterweight required by the first load test;
step four, installing a balance beam: each external sliding hanging bracket 5 is provided with a balance beam 4, each balance beam 4 comprises a balance beam main beam 4-1 and two balance beam clamping grooves 4-3 which are respectively and symmetrically arranged at two ends of the balance beam main beam 4-1, a balance beam mounting hole 4-2 matched with a balance beam connecting pin 3 is formed in the middle position of the balance beam main beam 4-1, each balance beam clamping groove 4-3 is a U-shaped clamping groove, openings of the two U-shaped clamping grooves are oppositely arranged, and sliding support locking pieces 5-1 are clamped on the U-shaped clamping grooves;
it should be noted that, if the balance beam 4 is directly installed on the balance beam connecting pin 3 at the bottom of the automatic grabbing beam 2 of the gantry crane, when the automatic grabbing beam 2 of the gantry crane is matched with the outer sliding hanging frame 5 for the first time, the height of the outer sliding hanging frame 5 is also required to be measured and identified, the operation is complex, the balance beam 4 is directly installed on the outer sliding hanging frame 5, the automatic grabbing beam 2 of the gantry crane at the later stage is convenient to directly move to the position of the balance beam mounting hole 4-2 of the balance beam 4, the height of the automatic grabbing beam 2 of the gantry crane is not required to be adjusted, and the control is simple.
Step five, installing an automatic grabbing beam of a balancing Liang Yumen machine and completing a first load test: the interval between the two outer sliding hanging frames 5 is adjusted, so that a balance beam 4 on the two outer sliding hanging frames 5 is fixedly connected with a balance beam connecting pin 3 arranged on an automatic grabbing beam 2 of a door machine to be tested, and a single first load test is performed;
step six, removing the balance beam: the outer sliding hanging frame 5 is kept motionless, the height position of the automatic grabbing beam 2 of the gantry crane is unchanged, and the automatic grabbing beam 2 of the gantry crane is utilized to drive the balance beam 4 to slide out of the test main hanging frame 6 along the horizontal direction;
step seven, adding the test counterweight again: continuously adding the test counterweight 8 into the test main hanging frame 6 by using the crane 10 until the counterweight required by the next load test is reached;
step eight, the balance beam is moved in and the next load test is completed: the outer sliding hanging frames 5 are kept motionless, the height position of the automatic grabbing beam 2 of the gantry crane is unchanged, the automatic grabbing beam 2 of the gantry crane is utilized to drive the balance beams 4 to slide into the test main hanging frames 6 along the horizontal direction until the two balance beams 4 are respectively matched with the two outer sliding hanging frames 5, the central axis of the balance beams 4 is kept to coincide with the central axis of the outer sliding hanging frames 5, and a single load test is carried out next time;
step nine, circulating the step six to the step eight for multiple times to finish single-item multiple different load tests;
step ten, replacing a test door machine: and (3) separating the automatic grabbing beam 2 of the gantry crane from the balance beam connecting pin 3, replacing a new test gantry crane according to a test arrangement rule, and taking the automatic grabbing beam 2 of the gantry crane on the new test gantry crane as the automatic grabbing beam 2 of the gantry crane to be tested, and then, circulating the second step.
In this embodiment, the plurality of different load tests includes static load tests of 25%, 50%, 100% and 125% of rated workload of the large door machine, and dynamic load tests of 70%, 100% and 110% of rated workload of the large door machine.
In this embodiment, when the required weight of the load test exceeds 50% of the rated working load of the large-sized door machine, the movable connecting piece 7 is installed on the top surface of the cube frame along the width direction, the movable connecting piece 7 comprises two connecting rod installation seats 7-1 and a movable connecting rod 7-2 installed between the two connecting rod installation seats 7-1, and the movable connecting rod 7-2 is fixedly connected with the connecting rod installation seats 7-1 through the connecting rod locking pin 7-3.
When the invention is used, the automatic grabbing beams of the gantry crane, which are arranged when the gantry crane opens and closes the gate, are fully utilized, two balance beams are designed to be matched with the automatic grabbing beams of the gantry crane to carry out the load test action of the gantry crane, and the outer sliding hanging frame slides on the main hanging frame to meet the test requirements of different grabbing beam sizes, so that the defects and defects of the traditional steel wire rope as a hoisting means are overcome, manual operation is not needed, the construction is convenient, and the working efficiency is high.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (6)
1. A large-scale door machine load test device which characterized in that: the device comprises a test main hanging bracket (6) for bearing a test counterweight (8), an outer sliding hanging bracket (5) arranged outside the test main hanging bracket (6) and a balance beam (4) arranged outside the outer sliding hanging bracket (5) and connected with an automatic door machine grabbing beam (2), wherein a limiting mechanism (9) used for limiting the moving position of the outer sliding hanging bracket (5) is arranged at the bottom of the test main hanging bracket (6), a balance beam connecting pin (3) is arranged at the bottom of the automatic door machine grabbing beam (2), the top of the automatic door machine grabbing beam (2) is matched with a door movable pulley block (1), the test main hanging bracket (6) is a cube frame, inclined supports which are arranged in a crossing manner are arranged on the front side, the rear side, the left side, the right side and the bottom of the cube frame, the top surface of the cube frame is of an open structure, the outer sliding hanging bracket (5) comprises a U-shaped sliding supporting hoop frame (5-2) sleeved outside the test main hanging bracket (6), the U-shaped sliding supporting hoop frame is provided with a top opening, the U-shaped sliding supporting hoop frame is larger than the height of the U-shaped supporting hoop frame (6) at the position of the test hanging bracket (5) at which is smaller than the height of the two lock brackets (1) at the position of the test hanging bracket (5), the outer side distance between the two sliding support locking pieces (5-1) is larger than the width of the sliding support hoop frame (5-2), a roller (5-3) which is in butt joint with the top surface of the test main hanging frame (6) is arranged on the bottom surface of the sliding support locking piece (5-1), and a fastening bolt (5-4) which is connected with the side surface of the test main hanging frame (6) is arranged on the side surface of the U-shaped sliding support hoop frame;
the balance beam (4) comprises a balance beam main beam (4-1) and two balance Liang Kazhuang grooves (4-3) which are symmetrically arranged at two ends of the balance beam main beam (4-1), a balance beam mounting hole (4-2) matched with the balance beam connecting pin (3) is formed in the middle position of the balance beam main beam (4-1), the balance Liang Kazhuang groove (4-3) is a U-shaped clamping groove, openings of the two U-shaped clamping grooves are oppositely arranged, and the sliding support lock piece (5-1) is clamped on the U-shaped clamping groove;
the number of the limiting mechanisms (9) is three, the three limiting mechanisms (9) are sequentially arranged at the bottom of the test main hanging frame (6) along the length direction of the test main hanging frame (6), one limiting mechanism (9) of the three limiting mechanisms (9) is arranged at the middle position of the bottom of the test main hanging frame (6), and the remaining two limiting mechanisms (9) of the three limiting mechanisms (9) are respectively arranged at two ends of the test main hanging frame (6).
2. The large portal crane load test device according to claim 1, wherein: the number of the outer sliding hanging frames (5) is two, the number of the balance beams (4) is equal to the number of the outer sliding hanging frames (5) and corresponds to the number of the outer sliding hanging frames (5) one by one, and the outer sliding hanging frames (5) are arranged at the positions, between the two adjacent limiting mechanisms (9), of the main test hanging frames (6).
3. The large portal crane load test device according to claim 1, wherein: the top surface of the cube frame is provided with a movable connecting piece (7) along the width direction, the movable connecting piece (7) comprises two connecting rod installation seats (7-1) and a movable connecting rod (7-2) arranged between the two connecting rod installation seats (7-1), and the movable connecting rod (7-2) is fixedly connected with the connecting rod installation seats (7-1) through a connecting rod locking pin (7-3).
4. A method for carrying out a large portal crane load test using the apparatus of claim 1, wherein: the method comprises the following steps:
step one, determining a test door machine: selecting a door machine to be tested on a construction site according to a test arrangement rule;
step two, mounting an external sliding hanger: three limiting mechanisms (9) are sequentially arranged at the bottom of the test main hanging frame (6) along the length direction of the test main hanging frame (6), two outer sliding hanging frames (5) are arranged outside the test main hanging frame (6), and the two outer sliding hanging frames (5) and the three limiting mechanisms (9) are distributed at intervals;
step three, adding a test counterweight for the first time: adding a test counterweight (8) into the test main hanging frame (6) from the top opening of the test main hanging frame (6) by using a crane (10) until the counterweight is required by a first load test;
step four, installing a balance beam: a balance beam (4) is arranged on each outer sliding hanger (5);
step five, installing an automatic grabbing beam of a balancing Liang Yumen machine and completing a first load test: the interval between the two outer sliding hanging frames (5) is adjusted, so that a balance beam (4) on the two outer sliding hanging frames (5) is fixedly connected with a balance beam connecting pin (3) arranged on an automatic grabbing beam (2) of a door machine to be tested, and a single first load test is carried out;
step six, removing the balance beam: the outer sliding hanging frame (5) is kept motionless, the height position of the automatic grabbing beam (2) of the gantry crane is unchanged, and the automatic grabbing beam (2) of the gantry crane is utilized to drive the balance beam (4) to slide out of the main test hanging frame (6) along the horizontal direction;
step seven, adding the test counterweight again: continuously adding a test counterweight (8) into the test main hanging frame (6) by using a crane (10) until the counterweight required by the next load test is reached;
step eight, the balance beam is moved in and the next load test is completed: the outer sliding hanging frames (5) are kept motionless, the height position of the automatic grabbing beam (2) of the gantry crane is unchanged, the automatic grabbing beam (2) of the gantry crane is utilized to drive the balance beams (4) to slide into the test main hanging frames (6) along the horizontal direction until the two balance beams (4) are respectively matched with the two outer sliding hanging frames (5), the central axis of the balance beams (4) is kept to coincide with the central axis of the outer sliding hanging frames (5), and a single next load test is carried out;
step nine, circulating the step six to the step eight for multiple times to finish single-item multiple different load tests;
step ten, replacing a test door machine: and (3) separating the automatic grabbing beam (2) of the gantry crane from the balance beam connecting pin (3), replacing a new test gantry crane according to a test arrangement rule, and taking the automatic grabbing beam (2) of the gantry crane on the new test gantry crane as the automatic grabbing beam (2) of the gantry crane to be tested, and then, circulating the second step.
5. The method of claim 4, wherein: the multiple different load tests include static load tests of 25%, 50%, 100% and 125% of rated workload of the large door machine, and dynamic load tests of 70%, 100% and 110% of rated workload of the large door machine.
6. The method according to claim 5, wherein: when the required counterweight of the load test exceeds 50% of rated working load of the large-sized door machine, a movable connecting piece (7) is installed on the top surface of the cube frame along the width direction, the movable connecting piece (7) comprises two connecting rod installation seats (7-1) and a movable connecting rod (7-2) installed between the two connecting rod installation seats (7-1), and the movable connecting rod (7-2) is fixedly connected with the connecting rod installation seats (7-1) through a connecting rod locking pin (7-3).
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CN111397886B (en) * | 2020-04-24 | 2021-09-24 | 中国水利水电夹江水工机械有限公司 | Hydraulic grabbing beam testing method |
CN114136678B (en) * | 2021-11-29 | 2023-07-25 | 中交二航局第二工程有限公司 | Load test device and load test method for hoisting equipment |
CN114136681B (en) * | 2021-11-29 | 2023-07-25 | 中交二航局第二工程有限公司 | Crane load test device and load test method |
CN114216714B (en) * | 2021-12-31 | 2024-07-23 | 水利部水工金属结构质量检验测试中心 | Hydraulic hoist test system |
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