CN211855699U - Device for measuring center of gravity of rotating part of rotating bridge - Google Patents
Device for measuring center of gravity of rotating part of rotating bridge Download PDFInfo
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- CN211855699U CN211855699U CN202020450383.3U CN202020450383U CN211855699U CN 211855699 U CN211855699 U CN 211855699U CN 202020450383 U CN202020450383 U CN 202020450383U CN 211855699 U CN211855699 U CN 211855699U
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Abstract
The present application relates to a front view of a device for measuring the center of gravity of a swivel part of a swivel bridge. The swivel bridge comprises a lower rotary table and a swivel part, wherein the swivel part comprises an upper rotary table and a beam body, and the beam body can rotate around the lower rotary table through the upper rotary table; the device includes: 4n force measuring devices and control devices for measuring load force, wherein n is a positive integer; all the force measuring devices are arranged at intervals along the circumferential direction of the lower rotary table and supported between the lower rotary table and the upper rotary table, the force measuring devices surround a circle which takes the center O of the lower rotary table as the center of the circle and takes R as the radius, and the central angle between two adjacent force measuring devices is theta; and the control device is connected with the force measuring device and is used for acquiring the load force measured by the force measuring device and calculating the gravity center eccentricity e of the rotating body part by combining R and theta. The problem of need the very big jacking force of load to rotate the partial jacking of turning to taking place among the correlation technique, just can measure the focus of turning part is solved.
Description
Technical Field
The application relates to the technical field of bridge rotation construction, in particular to a device for measuring the center of gravity of a rotation part of a rotation bridge.
Background
At present, in order to reduce the influence on an operation line as much as possible, bridge swivel construction is often the first choice or even the necessary choice when crossing railways and highways. The turning system of the turning bridge consists of a lower turntable, an upper spherical hinge, a lower spherical hinge, a slideway and a traction system, wherein the upper turntable can rotate around the lower turntable through the upper spherical hinge and the lower spherical hinge. And constructing the pier and the beam body on the upper rotary table, wherein the upper rotary table, the pier and the beam body form a rotating part together. After the construction of the bridge pier and the bridge body is completed, the rotating body part pulls the traction rope through the jack to form rotating force to realize rotating. The balance control of the rotating part in the rotating process is a key point, so that the structural safety of the rotating part in the rotating process is ensured, and the center of gravity is not excessively large; and the controllability of the rotating part in the rotating process is ensured, and the gravity center eccentricity is not too small. Thus, the determination and adjustment of the center of gravity of the rotating portion of the bridge is required in front of the rotor.
In the related technology, the adopted method is to carry out the non-balance weight test on a rotor part, and Chinese patent document with an authorization publication number of CN105507163B discloses' an equipment and a detection method for judging a critical point of a rotor bridge weighing test, and the adopted method is a ball hinge vertical rotation method, and the main principle is that when the ball hinge is in an extreme state between a static friction state and a dynamic friction state, the stress state changes suddenly, and simultaneously, the displacement at the ball hinge changes suddenly, so that the corresponding load in the extreme state is judged, and the unbalanced moment is obtained according to a related calculation formula, so that the gravity center eccentricity value is determined; the equipment used must contain a displacement sensor for loading the equipment jack and measuring the deformation.
But the unbalance weighing test adopting the spherical hinge vertical rotation method for measuring the gravity center of the rotating part of the rotating bridge has great defects:
1. at present, the weight of a single rotating part of a rotating bridge reaches 46000 tons, when the weight of the rotating part is larger or is curved, the required jacking load is very large, the requirement on a jacking device is higher and complex, and when the jacking load is very large, the damage to a local concrete structure can be caused.
2. The data cannot be processed in real time and the load of the control force cannot be fed back in the jacking loading process, so that the rotation is out of control, the beam body overturns, and the safety risk is high.
3. When jacking each time, the rotating body part needs to be jacked to rotate, the required data can be obtained, and the space geometric position of the beam body of the rotating body part can be changed when jacking rotates each time; during subsequent closure construction, the longitudinal and transverse spatial geometrical postures of the beam body must be adjusted, otherwise, the difference is too large, closure cannot be performed, particularly, steel beams have high control precision requirements, the workload required to be adjusted is very large, and the adjustment is very complex.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a device for measuring swivel part focus of a swivel bridge to solve the problem that the swivel part can be measured by jacking the swivel part to the occurrence of rotation with the very large jacking force of load in the related art.
In a first aspect, there is provided an apparatus for measuring the center of gravity of a swivel section of a swivel bridge, the swivel bridge comprising a lower turntable and a swivel section, the swivel section comprising an upper turntable and a beam rotatable about the lower turntable by the upper turntable; the device includes:
4n force measuring devices for measuring load force, wherein n is a positive integer; all the force measuring devices are used for being arranged at intervals along the circumferential direction of the lower turntable and supported between the lower turntable and the upper turntable, and all the force measuring devices are arranged in a surrounding manner to form a circle with the center O of the lower turntable as the center of the circle and R as the radius, and the central angle between two adjacent force measuring devices is theta;
and the control device is connected with the force measuring device and is used for acquiring the load force measured by the force measuring device and calculating the gravity center eccentricity e of the rotating body part by combining R and theta.
In some embodiments, the lower dial comprises:
-a lower tray, which is upwardly convexly provided at its center and forms a lower turntable;
-a lower spherical hinge provided on the lower turntable;
the upper rotary plate comprises:
-an upper tray, which is downwardly convexly provided at the center thereof and forms an upper turntable;
-an upper spherical hinge provided on said upper turntable; and the upper spherical hinge is matched with the lower spherical hinge, so that the upper rotary disc can rotate around the lower spherical hinge through the upper spherical hinge.
In some embodiments, the lower spherical hinge is a spherical structure formed by downward depression of the lower turntable, and the upper spherical hinge is a spherical structure formed by downward projection of the upper turntable.
In some embodiments, the lower spherical hinge is a spherical structure formed by the lower rotary table protruding upward, and the upper spherical hinge is a spherical structure formed by the upper rotary table sinking upward.
In some embodiments, the upper tray has a diameter smaller than a diameter of the lower tray.
In some embodiments, the upper disc has a diameter greater than a diameter of the lower turntable.
In some embodiments, the apparatus further includes a plurality of supporting pillars, the supporting pillars are arranged along the circumferential direction of the lower turntable at regular intervals and supported between the lower turntable and the upper turntable, and all the supporting pillars are arranged around the center O of the lower turntable as a circle center, and R is taken as a circle center2Is a circle with a radius.
In some embodiments, the R is2Greater than R.
The beneficial effect that technical scheme that this application provided brought includes: according to the method, the characteristics of a rotating bridge structure are utilized, 4n force measuring devices are uniformly arranged between the upper rotary table and the lower rotary table, and the gravity center eccentricity e of the rotating part can be calculated only by completing the arrangement of the force measuring devices, acquiring the arrangement parameters R and theta of the force measuring devices and combining the load force measured by the force measuring devices. The problem that the gravity center of the rotating body part can be measured only by jacking the rotating body part to rotate by the aid of the jacking force with large load in the related technology is solved. The measuring process is simple and efficient, the gravity center eccentric amount e of the rotating part can be measured in real time, the gravity center eccentric amount e can be obtained in the process of constructing the rotating part, safety and balance control of the construction process is facilitated, and the measuring accuracy and timeliness and construction safety and controllability are guaranteed.
The embodiment of the application provides a device for measuring the center of gravity of a rotating part of a rotating bridge, and because the device utilizes the characteristics of a rotating bridge structure, 4n force measuring devices are uniformly arranged between an upper rotating disc and a lower rotating disc, only the arrangement of the force measuring devices is needed to be completed, the arrangement parameters R and theta of the force measuring devices are obtained, and the load force measured by the force measuring devices is combined, so that the center of gravity eccentricity e of the rotating part can be calculated. Therefore, the force measuring device solves the problem that the rotating part is jacked to rotate by the jacking force with large load in the prior art, and the gravity center of the rotating part can be measured. The measuring process is simple and efficient, the gravity center eccentric amount e of the rotating part can be measured in real time, the gravity center eccentric amount e can be obtained in the process of constructing the rotating part, safety and balance control of the construction process is facilitated, and the measuring accuracy and timeliness and construction safety and controllability are guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a front view of an apparatus for measuring the center of gravity of a swivel portion of a swivel bridge according to an embodiment of the present application;
FIG. 2 is a plan view of a force measuring device for a device for measuring the center of gravity of a swivel portion of a swivel bridge according to an embodiment of the present disclosure;
fig. 3 is a top view of fig. 1.
In the figure: 1-lower turntable, 10-lower turntable, 11-lower turntable, 12-lower spherical hinge, 2-upper turntable, 20-upper turntable, 21-upper turntable, 22-upper spherical hinge, 3-beam body, 4-rotator part, 5-control device, 6-force measuring device, 7-load trolley and 8-support column.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a device for measuring swivel part focus of a swivel bridge, which can solve the problem that the swivel part can be measured by jacking the swivel part to rotate by the aid of the jacking force with large load in the related art.
Example 1:
fig. 1 is a front view of a device for measuring the center of gravity of a swivel part of a swivel bridge provided in embodiment 1 of the present application. The swivel bridge comprises a lower rotary table 1 and a swivel part 4, wherein the swivel part 4 comprises an upper rotary table 2 and a beam body 3, and the beam body 3 can rotate around the lower rotary table 1 through the upper rotary table 2; the device includes: 4n force measuring devices 6 and control devices 5 for measuring load force, wherein n is a positive integer; all the force measuring devices 6 are arranged at intervals along the circumferential direction of the lower rotary disk 1 and supported between the lower rotary disk 1 and the upper rotary disk 2, and all the force measuring devices 6 are arranged around a circle with the center O of the lower rotary disk 1 as the center of the circle and R as the radius, and the central angle between two adjacent force measuring devices 6 is theta; the control device 5 is connected to the force measuring device 6 and is adapted to acquire the load force measured by the force measuring device 6 and, in combination with R and θ, to calculate the eccentricity e of the center of gravity of the swivel part 4. Specifically, the method comprises the following steps: taking O as a central point, the transverse bridge direction as a transverse central line of the lower rotary table 1, and the longitudinal bridge direction as a longitudinal central line of the lower rotary table 1, and dividing the lower rotary table 1 into an E area, an S area, a W area and an N area, wherein the E area and the N area are positioned on the large-mileage side of the longitudinal central line and are respectively positioned on the right side and the left side of the transverse central line; the S area and the W area are positioned on the small mileage side of the longitudinal center line and are respectively positioned on the right side and the left side of the transverse center line; the force measuring devices 6 are uniformly arranged in the areas E, S, W and N, and at least one force measuring device 6 is arranged in each area, so that the required number of the force measuring devices 6 is 4N, and N is the number of the force measuring devices 6 arranged in each area.
In the embodiment 1 of the present application, by using the characteristics of the swivel bridge structure, 4n force measuring devices 6 are uniformly arranged between the upper turntable 2 and the lower turntable 1, and the gravity center eccentricity e of the swivel part 4 can be calculated only by completing the arrangement of the force measuring devices 6, obtaining the arrangement parameters R and θ of the force measuring devices 6, and combining the load force measured by the force measuring devices 6. The problem that the gravity center of the rotating body part can be measured only by jacking the rotating body part to rotate by the aid of the jacking force with large load in the related technology is solved. The measuring process is simple and efficient, the gravity center eccentric amount e of the rotating part 4 can be measured in real time, the gravity center eccentric amount e can be obtained in the process of constructing the rotating part 4, the safety and balance of the construction process can be conveniently controlled, and the measuring accuracy and timeliness and the construction safety and controllability are guaranteed.
Preferably, the lower rotary table 1 comprises a lower table body 10 and a lower spherical hinge 12, the center of the lower table body 10 is arranged upwards in a protruding mode and forms a lower rotary table 11, and the lower spherical hinge 12 is arranged on the lower rotary table 11; the upper turntable 2 comprises an upper turntable body 20 and an upper spherical hinge 22, the center of the upper turntable body 20 is arranged downwards in a protruding mode and is provided with an upper turntable 21, and the upper spherical hinge 22 is arranged on the upper turntable 21; and the upper spherical hinge 22 is matched with the lower spherical hinge 12, so that the upper rotary disc 2 can rotate around the lower spherical hinge 12 through the upper spherical hinge 22. Where R and θ are calculated as follows:
the number 4n of force-measuring devices 6 required is calculated from the radius r of the lower turntable 1, and the central angle θ, n being a positive integer, of two adjacent force-measuring devices 6 with respect to the center O of the lower turntable 1. The radius r of the lower rotary table 1 is the radius of the projection of the lower spherical hinge 12 on the lower table body 10. N and θ are calculated using the following equations:
optionally, referring to fig. 2, the lower spherical hinge 12 is a spherical structure formed by the downward depression of the lower turntable 11, and the upper spherical hinge 22 is a spherical structure formed by the downward protrusion of the upper turntable 21. In the process of turning the bridge, the lower spherical hinge 12 is sleeved outside the upper spherical hinge 22, and the upper spherical hinge 22 rotates in the lower spherical hinge 12.
Optionally, the lower spherical hinge 12 is a spherical structure formed by the lower turntable 11 protruding upward, and the upper spherical hinge 22 is a spherical structure formed by the upper turntable 21 sinking upward. In the turning process of the bridge, the upper spherical hinge 22 is sleeved outside the lower spherical hinge 12, and the upper spherical hinge 22 turns outside the lower spherical hinge 12.
Further, the upper disc body 20 has a diameter smaller than that of the lower disc body 10. The lower tray 10 is a base, and in order to ensure stability and better support, the diameter of the lower tray 10 needs to be designed to be larger.
Further, the upper plate body 20 has a diameter larger than that of the lower turntable 11, which facilitates installation of the force measuring device 6 between the upper plate body 20 and the upper plate body 20.
Optionally, the apparatus further includes a plurality of supporting pillars 8, the supporting pillars 8 are arranged along the circumferential direction of the lower turntable 1 at uniform intervals and supported between the lower turntable 1 and the upper turntable 2, and all the supporting pillars 8 enclose the center O of the lower turntable 1 as the center of circle, and R is used as the center of circle2Is a circle with a radius. Because the weight of the swivel part 4 is large, the bearing capacity of the force measuring device 6 is limited, and the bearing capacity exceeding the bearing capacity can influence the measuring result, so that the supporting columns 8 are arranged to share the load of the swivel part 4, and the force measuring device is prevented from being damaged.
Preferably, R2Greater than R, the support column 8 is convenient to dismantle in the later period. And the radius of the supporting column 8 is R ', the distance R between the arrangement position of the force measuring device 6 and the center O also needs to take into account the radius R ' of the supporting column 8, which is R ═ R ' in embodiment 2 of the present application1-2R' -1, in which case R1Is the radius of the upper disc body 20. When R is1When R' is 0.7m, R is 3.6 m.
Example 2:
the embodiment 2 of the application provides a method for measuring the center of gravity of a rotating body part of a rotating body bridge, which can solve the problem that the center of gravity of the rotating body part can be measured only by jacking the rotating body part to rotate by using the jacking force with large load in the related art. Which comprises the following steps:
s1: the number 4n of force-measuring devices 6 required is calculated from the radius r of the lower turntable 1, and the central angle θ, n being a positive integer, of two adjacent force-measuring devices 6 with respect to the center O of the lower turntable 1. Referring to fig. 1 and 2, specifically: taking O as a central point, the transverse bridge direction as a transverse central line of the lower rotary table 1, and the longitudinal bridge direction as a longitudinal central line of the lower rotary table 1, and dividing the lower rotary table 1 into an E area, an S area, a W area and an N area, wherein the E area and the N area are positioned on the large-mileage side of the longitudinal central line and are respectively positioned on the right side and the left side of the transverse central line; the S area and the W area are positioned on the small mileage side of the longitudinal center line and are respectively positioned on the right side and the left side of the transverse center line; the force measuring devices 6 are uniformly arranged in the areas E, S, W and N, and at least one force measuring device 6 is arranged in each area, so that the required number of the force measuring devices 6 is 4N, and N is the number of the force measuring devices 6 arranged in each area.
The lower turntable 1 comprises a lower turntable body 10 and a lower spherical hinge 12, the center of the lower turntable body 10 is arranged upwards in a protruding mode and forms a lower turntable 11, and the lower spherical hinge 12 is arranged on the lower turntable 11; the upper turntable 2 comprises an upper turntable body 20 and an upper spherical hinge 22, the center of the upper turntable body 20 is arranged downwards in a protruding mode and is provided with an upper turntable 21, and the upper spherical hinge 22 is arranged on the upper turntable 21; and the upper spherical hinge 22 is matched with the lower spherical hinge 12, so that the upper rotary disc 2 can rotate around the lower spherical hinge 12 through the upper spherical hinge 22. The radius r of the lower rotary table 1 is the radius of the projection of the lower spherical hinge 12 on the lower table body 10. N and θ are calculated using the following equations:
the number of force measuring devices 6 and θ of example 2 of the present application are given in the following table:
when r is 2.5m, n is 5, θ is 18 degrees, and the total number of the force measuring devices 6 is 20.
S2: determining the distance R between the arrangement position of the force measuring device 6 and the center O; referring to fig. 1, in embodiment 2 of the present application, the radius of the upper tray 20 is smaller than that of the lower tray 10, and the radius of the upper tray 20 is larger than that of the lower turntable 11. When selecting the arrangement position of the force measuring device 6, it is therefore necessary to ensure that R is greater than the radius of the lower turntable 11 and less than the radius of the upper plate 20. In addition, preferably, in embodiment 1 of the present application, positions of a plurality of supporting columns 8 are reserved when measuring the center of gravity of the rotating body portion, so that the plurality of supporting columns 8 are uniformly arranged at intervals along the circumferential direction of the lower rotating disk 1 and are supported between the lower rotating disk 1 and the upper rotating disk 2, and all the supporting columns 8 enclose the center O of the lower rotating disk 1 as the center of a circle, and R is used as the center of the circle2Is a circle of radius, R2Greater than R and the support post 8 has a radius R'. Therefore, the distance R between the arrangement position of the force measuring device 6 and the center O also needs to take into account the radius R' of the support column 8, where R ═ R in embodiment 1 of the present application1-2R' -1, in which case R1Is the radius of the upper disc body 20. When R is1When the distance R' is equal to 0.7m and the distance R is equal to 3.6m, the force measuring devices 6 are arranged on a circle with a radius of 3.6m and the center of the circle is O, and the included angle between two adjacent force measuring devices 6 is 18 degrees.
S3: uniformly arranging all the force measuring devices 6 on the lower rotary table 1 along the circumferential direction of the lower rotary table 1, so that all the force measuring devices 6 are surrounded to form a circle with O as the center of circle and R as the radius, and the central angle between two adjacent force measuring devices 6 is theta; and all the supporting columns 8 are uniformly arranged on the lower rotary table 1, so that all the supporting columns 8 surround the center O of the lower rotary table 1 as the center of a circle, and R is used as the center of the circle2Is a circle with a radius.
S4: an upper rotary table 2 and a beam body 3 are sequentially constructed on the lower rotary table 1, the construction of a rotating body part 4 is completed, and a force measuring device 6 and a support column 8 are supported between the upper rotary table 2 and the lower rotary table 1.
S5: the control device 5 obtains all the load forces measured by the force measuring device 6, and the gravity center eccentricity e of the rotating body part 4 is calculated by combining R and theta, wherein the gravity center eccentricity e comprises a transverse component eHAnd a longitudinal component eZ。
Wherein e isHThe calculation formula of (a) is as follows:
in the formula, P6EThe load force, P, measured for the force-measuring device 6 located in the region E6SFor the load forces measured by the force-measuring device 6 located in the region S,P6Wthe load force, P, measured for the force-measuring device 6 located in the area W6NThe load force measured for the force measuring device 6 located in the N region;
the moment sum of the load force measured by the force measuring devices 6 positioned in the areas E and S relative to the longitudinal center line of the lower turntable 1;
the moment sum of the load force measured by the force measuring devices 6 positioned in the W area and the N area relative to the longitudinal center line of the lower turntable 1;
is a transverse unbalanced moment; e.g. of the typeHIs the lateral component of the eccentricity of the centre of gravity of the rotor part 4, if eHIs positive number indicates eccentricity to the left, if eHIs negative number means eccentricity to the right; g is the weight of the swivel part 4.
eZThe calculation formula of (a) is as follows:
in the formula (I), the compound is shown in the specification,
the moment sum of the load forces measured by the force measuring devices 6 positioned in the areas E and N relative to the transverse center line of the lower turntable 1;
the moment sum of the load forces measured by the force measuring devices 6 positioned in the S area and the W area relative to the transverse center line of the lower turntable 1;
longitudinal unbalance moment; e.g. of the typeZIs the longitudinal component of the eccentricity of the centre of gravity of the rotor part 4, if eZIs positive number indicating eccentricity to the side of big mileage if eZBeing negative indicates decentering to the small mileage side.
S6: and obtaining the actual gravity center of the rotating body part 4 according to the gravity center eccentric amount e and the circle center O. If e is obtained according to the above calculationHIs-0.01, eZ0, it can be seen that the center of gravity of the swivel part 4 is shifted to the right side by 0.01m along the lateral center line, and e is 0.01; if e is obtained according to the above calculationHIs 0, eZIs +0.02, it is known that the center of gravity of the swivel portion 4 is shifted by 0.02m toward the large mileage side along the longitudinal center line, and e is 0.02; if e is obtained according to the above calculationHIs +0.01, eZIs-0.02, it is known that the center of gravity of the rotor section 4 is shifted to the right side by 0.01m along the lateral center line, further shifted to the small mileage side by 0.02m, and shifted to the W region, and e is 0.022.
The method for measuring the center of gravity of the rotating part of the rotating bridge, which is provided by the embodiment 2 of the application, is different from the existing spherical hinge vertical rotation method, the method for safely and reliably determining the center of gravity of the rotating part of the rotating bridge is provided, the data of the force measuring device 6 is automatically acquired, the real-time monitoring of the center of gravity in the whole construction process is realized, and the intelligent monitoring of the center of gravity in the construction process and the safe construction of the rotating bridge are ensured; the problems that the beam body overturns due to a vertical rotation method, the space geometric position of the beam body changes and the like are solved, the construction safety is improved, and finally the lifting of the construction quality of the turning bridge and the reduction of the construction safety risk are realized.
Preferably, the embodiment 2 of the present application further includes the following steps after calculating the eccentric amount e of the center of gravity of the rotor portion 4:
s7: the control device 5 compares e with a preset multi-level threshold interval, judges the level of the threshold interval where e is located, sends out corresponding early warning to remind workers to take corresponding measures, and realizes monitoring of the degree of gravity center eccentricity.
The preset multi-level threshold interval comprises a first-level threshold interval, a second-level threshold interval, a third-level threshold interval and a fourth-level threshold interval, and the ranges of the first-level threshold interval, the second-level threshold interval, the third-level threshold interval and the fourth-level threshold interval are sequentially increased; the first threshold interval is [0.050, 0.150 ] and the third threshold interval is [0.150, e ]1) The threshold interval of four levels is [ e ]1，e2)。
With respect to e1And e2：
MZ＝0.64μ0NR
When M isG＝MZWhen e is present1＝MZ/G
In the formula, mu0The coefficient of static friction of the upper spherical hinge and the lower spherical hinge is obtained; g is the weight of the rotating part and the unit kN; r is the spherical radius of the upper spherical hinge in unit m; mZThe maximum static friction resistance moment of the upper spherical hinge and the lower spherical hinge is in kNm; mGIs the unbalanced moment of the rotor part, in kNm; e.g. of the type1Is MZAnd MGAnd the gravity center eccentricity determined when the gravity centers are equal.
MZ＝0.64μ0NR
MZC＝P2r2
When M isG＝MZ+MZCWhen e is present2＝MZ/G
In the formula, mu0The coefficient of static friction of the upper spherical hinge and the lower spherical hinge is obtained; g is the weight of the rotating part and the unit kN; r is the spherical radius of the upper spherical hinge in unit m; mZThe maximum static friction resistance moment of the upper spherical hinge and the lower spherical hinge is in kNm; mZCIs the supporting force P of the supporting column22000kN, the distance r from the support column to 02The support moment is provided in kNm; mGIs the unbalanced moment of the rotor part, in kNm; e2 is MGAnd MZCSum and MGAnd the gravity center eccentricity determined when the gravity centers are equal.
When e is in the first-level threshold interval, a green early warning is sent out;
when e is in the secondary threshold interval, sending out a blue early warning;
when e is in a three-level threshold interval, sending out an orange early warning;
and when e is in a four-level threshold interval, a red early warning is sent out.
Furthermore, referring to fig. 3, after calculating the gravity center eccentricity e of the rotor part 4 and before obtaining the actual gravity center of the rotor part 4, the gravity center eccentricity e needs to be verified and corrected, which specifically includes the following steps:
s5-1: the load trolley 7 for verifying the eccentricity of the gravity center is limited by the weight of the load trolley 7, and the embodiment 1 of the application only has the longitudinal component e of the eccentricity of the gravity centerZCorrecting;
s5-2: obtaining e according to a preset increasing amplitude delta xZM is more than or equal to 2, and the ith theoretical increment is recorded as ei，ei＝iΔx,i＝1，2......m；
S5-3: according to eiCombined with the weight G of the load carriage 7XCAnd the weight G of the swivel part 4, when e is calculatedZIncrease of eiIn time, the distance L from the load trolley 7 to the center of the beam body 3i(ii) a Calculating L by the following formulai：
The preset incremental amplitude Δ x is 0.005, and the calculation result is as follows:
s5-4: a load trolley 7 is placed on the beam body, the load trolley 7 and eZIs located on the same side, i.e. if eZIf the number is positive, the load trolley 7 is placed on the big mileage side, and if e is positive, the load trolley is placed on the big mileage sideZAnd if the number is negative, the load trolley 7 is placed on the small mileage side. Illustrating the distance L traveled by the load carriage 7i: if eHIs-0.01, eZIs +0.02, the longitudinal component indicating the center of gravity of the rotor section 4 is shifted by 0.02m toward the mileage side along the longitudinal center line when eZ0.005 is added, then the load trolley 7 is moved to the side of the big mileage along the longitudinal center line to a position 9.250 away from the center of the beam body 3; if eHIs-0.02, eZIs-0.03, the longitudinal component of the center of gravity of the rotor portion 4 is shown to be shifted by 0.03m toward the small mileage side along the longitudinal center line when eZBy 0.010, the load carriage 7 is moved along the longitudinal centerline to the side of the small range to a position 18.50 away from the center of the beam 3.
S5-5: obtaining the load force measured by the force measuring device 6, and calculating eZActual increment of Δ ei；
S5-6: according to Δ e1，Δe2......ΔemAnd e1，e2.....emObtaining a correction relational expression, and using the correction relational expression to eZCorrecting e by using the correction relationHMaking a correction to obtain a corrected eHThen e after correctionZAnd eHSubstituting into formula
A corrected e is obtained. And finally, obtaining the actual gravity center of the rotating body part 4 according to the corrected gravity center eccentric amount e and the circle center O.
After the gravity center eccentricity e is preliminarily determined, the gravity center eccentricity e is corrected through a simple, rapid and repeatable correction means, and the accurate gravity center of the rotating part 4 is obtained.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A device for measuring the centre of gravity of a swivel part of a swivel bridge, which swivel bridge comprises a lower turntable (1) and a swivel part (4), said swivel part (4) comprising an upper turntable (2) and a beam (3), said beam (3) being rotatable around said lower turntable (1) by means of said upper turntable (2); characterized in that the device comprises:
4n force measuring devices (6) for measuring load force, wherein n is a positive integer; all the force measuring devices (6) are arranged along the circumferential direction of the lower turntable (1) at intervals uniformly and supported between the lower turntable (1) and the upper turntable (2), all the force measuring devices (6) are arranged in a surrounding manner to form a circle with the center O of the lower turntable (1) as the center of a circle and R as the radius, and the central angle between two adjacent force measuring devices (6) is theta;
and the control device (5) is connected with the force measuring device (6) and is used for acquiring the load force measured by the force measuring device (6) and calculating the gravity center eccentricity e of the rotating body part (4) by combining R and theta.
2. The device for measuring the center of gravity of a swivel section of a swivel bridge of claim 1, wherein:
the lower turntable (1) comprises:
-a lower tray (10) with a central upward projection and formed with a lower turntable (11);
-a lower spherical hinge (12) provided on said lower turret (11);
the upper turntable (2) comprises:
-an upper disc (20) with a downwardly convex centre and formed with an upper turntable (21);
-an upper spherical hinge (22) provided on said upper turntable (21); and the upper spherical hinge (22) is matched with the lower spherical hinge (12) so that the upper turntable (2) can rotate around the lower spherical hinge (12) through the upper spherical hinge (22).
3. The device for measuring the center of gravity of a swivel part of a swivel bridge according to claim 2, wherein the lower spherical hinge (12) is a spherical structure formed by the downward depression of the lower swivel (11), and the upper spherical hinge (22) is a spherical structure formed by the downward projection of the upper swivel (21).
4. The device for measuring the center of gravity of a swivel part of a swivel bridge according to claim 2, wherein the lower spherical hinge (12) is a spherical structure formed by upwardly protruding the lower swivel (11), and the upper spherical hinge (22) is a spherical structure formed by upwardly recessing the upper swivel (21).
5. The device for measuring the center of gravity of a swivel part of a swivel bridge according to claim 2, wherein the diameter of the upper disc (20) is smaller than the diameter of the lower disc (10).
6. The device for measuring the center of gravity of a swivel part of a swivel bridge according to claim 2, wherein the diameter of the upper disc (20) is larger than the diameter of the lower turntable (11).
7. The apparatus for measuring the center of gravity of a swivel part of a swivel bridge according to claim 1, further comprising a plurality of support columns (8), wherein the plurality of support columns (8) are arranged at regular intervals along the circumferential direction of the lower rotary table (1) and supported between the lower rotary table (1) and the upper rotary table (2), and all the support columns (8) are arranged around the center O of the lower rotary table (1) as the center of the circle R2Is a circle with a radius.
8. The device for measuring the center of gravity of a swivel section of a swivel bridge of claim 7, wherein R is2Is greater thanR。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020450383.3U CN211855699U (en) | 2020-03-31 | 2020-03-31 | Device for measuring center of gravity of rotating part of rotating bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020450383.3U CN211855699U (en) | 2020-03-31 | 2020-03-31 | Device for measuring center of gravity of rotating part of rotating bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985565A (en) * | 2021-02-03 | 2021-06-18 | 中铁工程设计咨询集团有限公司 | Bridge weighing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985565A (en) * | 2021-02-03 | 2021-06-18 | 中铁工程设计咨询集团有限公司 | Bridge weighing method |
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