Background
With the rapid development of urban construction, three-dimensional traffic combining underground traffic and elevated traffic is increasing day by day, and an urban rail transit system taking an elevated bridge as a main structural form is applied to various big cities, so that the traffic jam pressure is effectively relieved, and the travel of people is greatly facilitated. However, considering that most of the overhead transportation lines are close to and even pass through dense residential areas, business areas, cultural and educational areas, high-tech industrial parks and the like in cities, the increasingly busy transportation lines can induce the problems of secondary vibration and noise pollution of the surrounding environment for a long time, and the quality of life of surrounding residents and the structural safety of surrounding buildings are seriously affected. Therefore, how to effectively prevent and treat the environmental vibration becomes a practical problem which has to be solved by constructing an environment-friendly society in actual engineering construction.
Research shows that the influence of earthquake action on the safety of the structure is mainly horizontal vibration and can cause the structure and the auxiliary structure thereof to generate plastic deformation, and the vibration caused by rail transit is mainly vertical vibration. Therefore, the control method of strong vibration is different from the control method of weak vibration. The existing bridge support is concerned about the horizontal shock insulation function, and the vertical shock absorption function is not considered. The vibration isolation support is an effective vibration control measure and can be used as a propagation path measure to prevent the vehicle-induced vibration of the viaduct from being propagated to the surrounding environment. In order to exert the vertical vibration reduction function of the vibration isolation support to the maximum extent, the vibration isolation support is required to have the characteristics of low vertical rigidity and high damping as far as possible, on one hand, the vibration dominant frequency band of the structure is changed, the resonance phenomenon of the structure is further avoided, and on the other hand, partial energy brought by the vibration of the structure can be consumed.
On one hand, the influence of external factors such as later-stage setting and construction errors of part of auxiliary facilities is considered, so that specific structural parameters are easy to change, and on the other hand, the deviation between the design value and the actual natural vibration frequency is inevitably caused by considering human factors or machine factors during support manufacturing. This requires the vibration isolation mount to be able to adjust the natural frequency at any time. However, the natural vibration frequency of the existing vibration isolation support including a rubber support or a spring support is a fixed value, and the adjustment of the natural vibration frequency is often realized by replacing the type of the support, which inevitably causes waste of manpower and material resources, and the construction difficulty is very high, so that the precise adjustment is difficult to realize, and the different vibration reduction and isolation requirements are difficult to adapt. Therefore, higher requirements are provided for vibration reduction and isolation control of the viaduct in urban construction, and the technical requirement for developing the vibration isolation support with adjustable horizontal rigidity and vertical rigidity for meeting the economic and reasonable requirements and having obvious vibration reduction and isolation effect exists in the field.
Disclosure of Invention
The invention provides a vibration isolation device with adjustable horizontal rigidity and vertical rigidity, which is used for solving the technical problem that the horizontal rigidity and the vertical rigidity of the vibration isolation device in the prior art are not adjustable.
The scheme for solving the technical problems is as follows: the utility model provides an isolation mounting with adjustable level is to and vertical rigidity, its characterized in that, including bottom plate, roof, vertical rubber vibration isolation subassembly, at least a set of slope rubber vibration isolation subassembly and at least a pair of adjustable spring bracket assembly, the roof is located the top of bottom plate, and with the relative interval of bottom plate sets up, the upper end and the lower extreme of vertical rubber vibration isolation subassembly respectively fixed connection in the roof with the bottom plate, every group slope rubber vibration isolation subassembly includes the slope rubber combination piece that two symmetries set up, adjustable slidable mounting in of the lower extreme of slope rubber combination piece in the bottom plate, adjustable slidable mounting in the upper portion of slope rubber combination piece in the upper portion of vertical rubber vibration isolation subassembly, adjustable spring bracket assembly is along the bilateral symmetry of vertical rubber vibration isolation subassembly and arranges, adjustable spring bracket assembly includes spliced pole, vertical rigidity, Steel spring, sleeve and fastener, the lower extreme of spliced pole set up to the ball pivot form install in the bottom plate, the lower pot head of steel spring is established and is welded in the spliced pole outer wall, the upper end and the connecting block consolidation of steel spring, the sleeve inner wall forms the helicla flute to form the spiral pair with steel spring, the steel spring is located to the cover, be used for with the part steel spring that the sleeve corresponds the position is fixed in the spliced pole, in order to adjust spring bracket assembly's vertical rigidity with adjustable, the fastener is used for fixing the sleeve is in relative position on the spliced pole is in order to prevent the sleeve landing.
The horizontal and vertical rigidity adjustable vibration isolation device provided by the invention is characterized in that the inclined rubber vibration isolation assembly comprises two inclined rubber combination blocks which are symmetrically arranged, and the angle of each inclined rubber combination block can be adjusted by adjusting the upper end position and the lower end position of each inclined rubber combination block, so that the horizontal rigidity and the vertical rigidity of the inclined rubber vibration isolation assembly are changed; the lower end of the steel spring is sleeved and welded on the outer wall of the connecting column, the upper end of the steel spring is fixedly connected with the connecting block, the inner wall of the sleeve forms a spiral groove and forms a spiral pair with the steel spring, when the sleeve continuously rotates upwards or downwards on the connecting column, the sleeve can fix part of the steel spring at the corresponding position on the connecting column, so that the effective length of the steel spring is continuously changed, and further, the vertical rigidity of the steel spring can be continuously adjusted within a certain range, and the vertical rigidity of the adjustable spring support is changed.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As shown in fig. 1 and 2, the present invention provides a horizontal and vertical stiffness adjustable vibration isolation device, which comprises a bottom plate 1, a top plate 2, a vertical rubber vibration isolation assembly 3, at least one group of inclined rubber vibration isolation assemblies 4, and at least one pair of adjustable spring bracket assemblies 5.
In the present embodiment, the number of the inclined rubber vibration isolating assemblies 4 is two, and the number of the adjustable spring bracket assemblies 5 is one pair, it should be noted that the present embodiment is only a preferred embodiment of the invention, and in other embodiments, the number of the inclined rubber vibration isolating assemblies and the number of the adjustable spring bracket assemblies may be other.
The top plate 2 is positioned above the bottom plate 1 and is arranged opposite to the bottom plate 1 at intervals; the bottom plate 1 is used as a supporting base body of the whole vibration isolation device, the top plate 2 can be used as a carrier of a building or a vehicle above the vibration isolation device, the bottom plate and the top plate are arranged at intervals, and a vibration isolation cavity for isolating vibration is formed in the middle of the top plate and the top plate.
The upper end and the lower end of the vertical rubber vibration isolation component 3 are respectively and fixedly connected to the top plate 2 and the bottom plate 1.
Each group of inclined rubber vibration isolation assemblies 4 comprises two inclined rubber combination blocks 41 which are symmetrically arranged, the lower ends of the inclined rubber combination blocks 41 are slidably mounted on the bottom plate 1 in an adjustable mode, and the upper ends of the inclined rubber combination blocks 41 are slidably mounted on the upper portion of the vertical rubber vibration isolation assembly 4 in an adjustable mode.
Specifically, each inclined rubber vibration isolation assembly 4 further comprises a vertical sliding block 42, a vertical fastening piece 43, a horizontal sliding block 44 and a horizontal fastening piece 45, wherein horizontal sliding grooves 11 are respectively formed in symmetrical positions on the bottom plate 1, which are opposite to the two sides of the vertical rubber vibration isolation assembly 3, the horizontal sliding block 44 is installed in the horizontal sliding grooves 11, the horizontal fastening piece 45 is used for fixing the position of the horizontal sliding block 44 in the horizontal sliding grooves 11, wherein the horizontal sliding block 44 can slide in a direction close to or far away from the vertical rubber vibration isolation assembly 4, and the lower end of the inclined rubber combination block 41 is hinged to the horizontal sliding block 44; set up vertical spout 31 between vertical rubber vibration isolation subassembly 3 and roof 2, vertical slider 42 is installed in vertical spout 31, and vertical fastener 43 is used for the position of fixed vertical slider 42 in vertical spout 31, and wherein, vertical slider 42 can slide along the vertical direction, and the upper end of slope rubber combination piece 41 articulates in vertical slider 42.
The vertical rubber vibration isolation assembly 3 comprises a vertical rubber combination block 32, the vertical rubber combination block 32 comprises a second upper sealing plate 321, a second lower sealing plate 322, a plurality of second rubber layers 323 and a plurality of second steel plate layers 324, the second upper sealing plate 321 and the second lower sealing plate 322 are oppositely arranged, and the plurality of second rubber layers 323 and the plurality of second steel plate layers 324 are sequentially stacked between the second upper sealing plate 321 and the second lower sealing plate 322 at intervals.
Wherein the second rubber layer 323 and the first steel plate layer 324 can be inlaid, bonded and vulcanized in actual production.
The vertical rubber combination block 32 can ensure the effective height of the whole vibration isolation device and can ensure certain bearing capacity requirement.
Specifically, the inclined rubber combination block 41 includes a first upper sealing plate 411, a first lower sealing plate 412 and a first rubber layer 413, the first upper sealing plate 411 and the first lower sealing plate 412 are arranged oppositely, the first rubber layer 413 is embedded between the first upper sealing plate 411 and the first lower sealing plate 412, the upper end of the first upper sealing plate 411 is hinged to the vertical slider 42, and the lower end of the first lower sealing plate 412 is hinged to the horizontal slider 44.
In this embodiment, the horizontal fastening member 45 is a first fastening bolt of the horizontal sliding block 42, and the vertical fastening member 43 is a second fastening bolt of the vertical sliding block 44, and during the specific implementation, holes may be formed in the side walls of the horizontal sliding groove and the vertical sliding groove in advance to form the fastening position, as shown in fig. 2, 8 bolt through holes are correspondingly formed in the horizontal sliding groove 11 and the vertical sliding groove 31, respectively, and the matching relationship between the fastening bolt and the bolt through hole may be adjusted according to the actual working condition requirement, so that the inclined rubber combination block has a better inclination angle, and provides good horizontal and vertical rigidity for the vibration isolation device.
In specific implementation, the vertical sliding groove 31 may be a groove directly formed in two sides of the vertical rubber combination block 32, or a guide member with a groove may be vertically installed above the vertical rubber combination block 32, so that the vertical rubber combination block is convenient to install.
The inclination angle of the inclined rubber combination block can be determined according to actual conditions, the inclined rubber combination block can play a good three-way vibration isolation/shock isolation effect within an angle interval of 40-70 degrees, and the outer layer of the inclined rubber combination block 41 is wrapped with a rubber protection layer 46.
Each pair of adjustable spring bracket assemblies 5 are symmetrically arranged along two sides of the vertical rubber vibration isolation assembly 3, each adjustable spring bracket assembly 5 comprises a connecting column 51, a steel spring 52, a sleeve 53 and a fastener 54, the lower end of the connecting column 51 is installed on the bottom plate 1 in a spherical hinge mode, the outer wall of the connecting column 51 is sleeved at the lower end of the steel spring 52, the lower end of the connecting column 51 is fixedly connected with the lower end of the connecting column 51, the upper end of the steel spring 52 is abutted to the top plate 2, the connecting column 51 is sleeved with the sleeve 53 in a sliding mode, the sleeve 53 is used for fixing part of the steel spring 52, corresponding to the sleeve 53, on the connecting column 51, the vertical rigidity of the adjustable spring bracket.
Specifically, the outer side wall of the connecting column 51 is formed with a first spiral groove, the inner side wall of the sleeve 53 is formed with a second spiral groove, the steel spring 52 is coiled and ascended along the first spiral groove, the second spiral groove and the outer side wall of the steel spring 52 form a spiral pair, and the fastening piece 54 is set as a set screw penetrating through the side wall of the sleeve 53 to prevent the sleeve from sliding down.
The steel spring 52 on the inner wall of the sleeve 53 is disabled because the sleeve 53 can clamp the inner wall of the sleeve 53 and the part of the outer wall of the connecting rod 51, i.e. the effective length of the steel spring 52 is actually only the part above the sleeve 53.
By rotating the sleeve 53 upwards or downwards, the effective length of the steel spring 52 can be changed, and the continuous adjustment of the vertical stiffness of the steel spring 52 can be realized within a certain range, so that the vertical stiffness of the adjustable spring support 5 is changed, the natural vibration frequency of the vibration isolation device is adjusted, and the vertical vibration dominant frequency band of the actual structure is changed. The vertical stiffness of the vibration isolation device is changed when the relative position of the sleeve 53 on the connecting post 51 is changed.
Wherein, canThe adjustable range of the vertical stiffness of the adjustable spring mount can be determined in such a way that the total stiffness of each steel spring is assumed to be ksTotal length of LmWherein the maximum length of the steel spring embedded in the sleeve is LsTherefore, the adjustable interval of the vertical stiffness of each steel spring is:
during actual use, the effective vertical stiffness of the adjustable spring support can be continuously adjusted within a certain range by changing the effective length of the steel spring 52 according to the actual engineering situation, so that the natural vibration frequency of the vibration isolation support is adjusted, the vertical vibration dominant frequency band of the actual structure is changed, and the optimal vertical vibration isolation effect is realized.
Preferably, the lower end of the connection pole 51 is provided with a first spherical hinge part 511, the bottom plate 1 is formed with a first spherical groove corresponding to the connection pole 51, the first spherical hinge part 511 is mounted in the corresponding first spherical groove,
preferably, a connection block 55 is installed at an upper end of the steel spring 52, a second spherical hinge member 551 is installed at an upper end of the connection block 55, a second spherical groove is formed at a position of the top plate 2 corresponding to the steel spring 52, and the second spherical hinge member 551 is installed in the corresponding second spherical groove.
The ends of the connecting column 51 and the connecting block 55 are arranged in a spherical hinge manner and form a revolute pair with the bottom plate 1 and the top plate 2 respectively, so that the adjustable spring support is allowed to perform certain directional movement.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.