Fixing device for steel grating sidewalk step plate of railway T-beam bridge

Abstract

The utility model relates to a fixing device for steel grating sidewalk step plates of a railway T-beam bridge, which comprises a fixed top plate and a plurality of locking hoops, and the fixed top plate is arranged to abut against the top surfaces of two adjacent steel grating sidewalk step plates. The first end of the locking hoop is rotationally connected with the first end of the fixed top plate, and the second end of the locking hoop is detachably connected with the second end of the fixed top plate. The locking hoops are arranged to reversely straddle the bottom face of the horizontal angle steel, the first ends and the second ends of the locking hoops penetrate through the interval between the corresponding steel grating sidewalk step plates in the two adjacent steel grating sidewalk step plates and then are connected with the two ends of the fixed top plate in a one-to-one correspondence mode, and the multiple locking hoops are sequentially arranged at intervals. The locking hoop binds the fixed top plate on the horizontal angle steel in a mode of straddling the horizontal angle steel, the steel grating sidewalk step plate is fixed by utilizing the downward pressure of the fixed top plate, the structure is simple, the carrying is convenient, the installation is convenient and fast, the effect is firm, and the steel grating sidewalk step plate is effectively prevented from horizontally displacing and falling off in the longitudinal and transverse directions.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge construction technical field especially relates to a kind of steel grating footway step plate of railway T beam bridge fixing device. BACKGROUND

[0002] Railway T beam bridge is the main bridge structure form of freight railway and passenger-freight railway in China, and a large number of existing bridges in China are all supported with simply supported reinforced concrete slab on angle steel support as footway step plate. Such step plate is replaceable small component, and the structure is in the form of thin plate, which is easy to fall off and crack in installation stage due to external force. The protective layer is thin, and the design service life is short. Moreover, it is in open air and other harsh environment for a long time, and after a certain period of use, it is easy to have problems such as surface concrete spalling and carbonization. The safety of step plate has become a problem that railway maintenance personnel are afraid to talk about. Moreover, the existing reinforced concrete step plate is simply supported on horizontal angle steel outside the overhang of railway bridge, and each end is supported on horizontal angle steel with a length of about 7 cm. When the step plate is damaged, it will directly fall off once one end is separated from the horizontal angle steel, which seriously endangers the life safety of maintenance workers. When the conventional reinforced concrete step plate is replaced, the concrete step plate is heavy, so it is often transported to the vicinity of the replacement location by crane or rail car, and then placed on the replacement location by manual work. The on-site construction is difficult and labor-intensive, and the step plate is easy to be damaged during moving.

[0003] The steel grating step plate product is mature and reliable, and has good integrity, high strength, light weight and is not afraid of knocking. It can be used as a substitute for conventional reinforced concrete step plate. However, when such step plate is installed, it is simply placed in the predetermined position, and then clamped on the horizontal angle steel of existing bridge by conventional lock clamp. After train vibration and personnel stepping vibration, the clamping force of lock clamp is easily loosened, and there is a risk of lock clamp falling off, step plate falling off and even being blown up to the track. The safety risk is large. If other fixing mode lock is used, it will change the simply supported stress mode of steel grating plate, and generate harmful secondary internal force on the horizontal angle steel of existing bridge. SUMMARY

[0004] (I) Technical problem to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a kind of steel grating footway step plate fixing device of railway T beam bridge.

[0006] (II) Technical scheme

[0007] In order to achieve the above-mentioned purpose, the utility model discloses a kind of steel grating footway step plate fixing device of railway T beam bridge, which comprises:

[0008] A fixing top plate is arranged to abut against the top surface of adjacent two steel grating footway step plates.

[0009] A plurality of locking clamps, the first end of the locking clamp is rotatably connected with the first end of the fixed top plate, and the second end of the locking clamp is detachably connected with the second end of the fixed top plate;

[0010] The locking clamp is arranged in reverse straddling on the bottom surface of the horizontal angle steel, the first end and the second end pass through the corresponding space of the adjacent two steel grating sidewalk steps and are respectively connected with the two ends of the fixed top plate one by one, and a plurality of locking clamps are arranged in sequence.

[0011] Optionally, a plurality of first through holes are formed in the fixed top plate near the first end of the fixed top plate, and the first ends of the plurality of locking clamps are connected with the plurality of first through holes one by one.

[0012] Optionally, the fixed device of the steel grating sidewalk step of the railway T-beam bridge comprises at least one pair of locking clamps, the first end of each pair of locking clamps passes through the corresponding first through hole and is connected by a connecting arm.

[0013] Optionally, a plurality of second through holes are formed in the fixed top plate near the second end of the fixed top plate, and the second ends of the plurality of locking clamps are connected with the plurality of second through holes one by one.

[0014] The part of the second end of the locking clamp extending out of the fixed top plate is detachably connected with an anti-falling mechanism, and the anti-falling mechanism abuts against the top surface of the fixed top plate.

[0015] Optionally, the anti-falling mechanism comprises a locking nut, a gasket and a bolt;

[0016] The gasket is sleeved on the locking clamp, the second end of the locking clamp is threadedly connected with the locking nut, and the gasket is located between the fixed top plate and the locking nut.

[0017] The second end of the locking clamp is provided with a pin hole, the bolt is sleeved in the pin hole, and the nut is located between the bolt and the gasket.

[0018] Optionally, the fixed top plate comprises a first top plate and a second top plate, and the first top plate and the second top plate are rotatably connected.

[0019] Optionally, the first top plate and the second top plate are rotatably connected by a pin shaft to form a hinge structure.

[0020] Optionally, the locking clamp comprises a fixed arm and a movable arm, the first end of the fixed arm and the first end of the movable arm are hingedly connected with each other, the second end of the fixed arm is connected with the first end of the fixed top plate, and the second end of the movable arm is detachably connected with the second end of the fixed top plate.

[0021] Optionally, the fixed arm and the movable arm each comprise a first branch arm and a second branch arm connected to each other, and the second branch arm of the fixed arm is hinged to the second branch arm of the movable arm.

[0022] The included angle of the first branch arm and the second branch arm is greater than 90 degrees, and the sum of the thickness value of the horizontal angle steel and the thickness value of the steel grating sidewalk step plate is not greater than the length value of the first branch arm.

[0023] Optionally, the locking clamp abuts against the bearing flat steel of the steel grating sidewalk step plate.

[0024] (Three) beneficial effects

[0025] The device is designed for the steel grating sidewalk step plate, the locking clamp binds the fixed top plate on the horizontal angle steel in the form of straddling the horizontal angle steel, and the steel grating sidewalk step plate is fixed by using the downward pressure of the fixed top plate, which is small in size, simple in structure, convenient to carry and install, reliable in effect, and effective in preventing the longitudinal and transverse horizontal displacement and falling of the steel grating sidewalk step plate. During installation and operation, the risk of lock falling off the bridge below does not occur, and the device is widely applicable. The device can fully exert the characteristics of the steel grating plate product type, mature technology and quality, and strong adaptability, and can reduce the engineering investment as much as possible, which plays a positive role in widening the application of the steel grating plate. The implementation of the device can effectively improve the current maintenance facilities of a large number of existing T-beam bridges, which has far-reaching significance for protecting the safety of railway operation and ensuring the safety of front-line maintenance personnel. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a three-dimensional structure schematic view of the fixing device of the utility model;

[0027] Figure 2 It is an installation side view schematic view of the fixing device of the utility model;

[0028] Figure 3 It is an installation top view schematic view of the fixing device of the utility model;

[0029] Figure 4 It is a structure schematic view of the connecting arm of the utility model;

[0030] Figure 5 It is a structure schematic view of the anti-falling mechanism of the utility model;

[0031] Figure 6 It is a structure schematic view of the fixed top plate of the utility model;

[0032] Figure 7 It is a structure schematic view of the fixed top plate of the utility model in the overturned state;

[0033] Figure 8The state diagram of the fixing device installation process one of the utility model;

[0034] Figure 9 The state diagram of the fixing device installation process two of the utility model.

[0035]

[0036] 1: fixed top plate;11: first through hole;12: second through hole;101: first top plate;102: second top plate;

[0037] 2: locking clamp;21: connecting arm;22: fixed arm;23: movable arm;221: first branch;222: second branch;

[0038] 3: steel grating sidewalk step;31: bearing flat steel;

[0039] 4: horizontal angle steel;

[0040] 5: anti-dropping mechanism;51: locking nut;52: gasket;53: bolt. DETAILED DESCRIPTION

[0041] In order to better explain the utility model, so as to facilitate understanding, the following specific embodiments are described in detail in conjunction with the drawings. Wherein, the orientation of the "upper", "lower" and other orientation terms mentioned in this paper is referred to the orientation of the drawings. Figure 1

[0042] Although the exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be realized in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the utility model, and to enable the scope of the utility model to be fully conveyed to those skilled in the art.

[0043] As shown in Figures 1 to 3 The utility model provides a kind of fixing device of steel grating sidewalk step of railway T beam bridge, it includes fixed top plate 1 and multiple locking clamps 2. Among them, fixed top plate 1 is placed in the top surface of steel grating sidewalk step 3 along railway direction, it is arranged to abut on the top surface of adjacent two steel grating sidewalk steps 3, just press on two adjacent steel grating sidewalk steps 3. In preferred embodiment, the center line of fixed top plate 1 perpendicular to railway direction is opposite to the joint of two steel grating sidewalk steps 3, guarantee the equal pressure exerted on two steel grating sidewalk steps 3.

[0044] ​​The first end of the locking clamp 2 is rotationally connected with the first end of the fixed top plate 1, and the direction of the locking clamp 2 is convenient to adjust during installation. The second end of the locking clamp 2 is detachably connected with the second end of the fixed top plate 1. During installation, the first end of the locking clamp 2 is first rotationally connected with the fixed top plate 1 to form a temporary assembly, and then the temporary assembly is placed at the designed installation position. The locking clamp 2 is in a free hanging state after passing through the gap of the steel grating sidewalk step 3 from the gap of the steel grating sidewalk step 3, and the fixed top plate 1 is directly placed on the two adjacent steel grating sidewalk steps 3. Then, the second end of the locking clamp 2 is manually pushed upward to the end of the steel grating sidewalk step 3 after passing through the steel grating sidewalk step 3, and the second end of the fixed top plate 1 is connected. After installation, the locking clamp 2 reversely straddles the bottom surface of the horizontal angle steel 4, and the first end and the second end pass through the gaps of the corresponding steel grating sidewalk steps 3 of the adjacent two steel grating sidewalk steps 3 and are connected with the two ends of the fixed top plate 1, respectively. A plurality of locking clamps 2 are arranged in sequence. The fixed top plate 1 is bound on the horizontal angle steel 4 by the plurality of locking clamps 2, and the fixed top plate 1 generates a downward pressure under the tension of the locking clamp 2, so as to press the two adjacent steel grating sidewalk steps 3. Each two adjacent steel grating sidewalk steps 3 are provided with a fixing device, and all the steel grating sidewalk steps 3 on the whole railway are fixed.

[0045] The device is designed for the steel grating sidewalk step 3. The locking clamp 2 binds the fixed top plate 1 on the horizontal angle steel 4 by straddling the horizontal angle steel 4, and fixes the steel grating sidewalk step 3 by using the downward pressure of the fixed top plate 1. The device has small size, simple structure, convenient carrying and installation, reliable effect, and effectively prevents the longitudinal and horizontal displacement and falling of the steel grating sidewalk step 3. During installation and operation, the device does not have the risk of falling off the bridge, and is widely applicable. The device can fully utilize the characteristics of the steel grating plate, such as multiple types, mature technology and quality, and strong adaptability, and can reduce the engineering investment as much as possible, and plays a positive role in widening the application of the steel grating plate. The implementation of the device can effectively improve the current maintenance facilities of the existing T-beam bridge, and has a far-reaching significance for ensuring the safety of railway operation and the safety of maintenance personnel on the front line.

[0046] As shown in Figure 3 and Figure 6 , a plurality of first through holes 11 are formed in the fixed top plate 1 near the first end of the fixed top plate 1, and the first ends of the plurality of locking clamps 2 are connected with the plurality of first through holes 11 in one-to-one correspondence. The diameter of the first through hole 11 is larger than the diameter of the locking clamp 2, and a certain amount of space is maintained between the locking clamp 2 and the first through hole 11 to ensure that the locking clamp 2 has a certain adjustment space when the second end is not fixed, so that the staff can better connect the second end of the locking clamp 2 with the fixed top plate 1.

[0047] In the preferred embodiment, referring to Figure 3 and Figure 4 , the fixing device of the steel grating sidewalk step plate of the railway T-beam bridge comprises at least one pair of locking clamps 2, the first ends of each pair of locking clamps 2 are connected through a connecting arm 21 after passing through a corresponding first through hole 11, forming an inverted U-shaped structure, and when assembling a temporary assembly, only the second ends of the two locking clamps 2 need to pass through a corresponding first through hole 11, and the connecting arm 21 is used to limit the limit position of the downward movement of the locking clamp 2, thereby simplifying the connection structure and improving the convenience of disassembly and assembly.

[0048] As shown in Figure 1 and Figure 5 , a plurality of second through holes 12 are formed in the fixing top plate 1 near the second end of the fixing top plate 1, and the second ends of the plurality of locking clamps 2 are connected in one-to-one correspondence with the plurality of second through holes 12. The part of the second end of the locking clamp 2 protruding from the fixing top plate 1 is detachably connected with an anti-falling mechanism 5, and the anti-falling mechanism 5 abuts against the top surface of the fixing top plate 1, and the second end of the locking clamp 2 and the fixing top plate 1 are locked through the anti-falling mechanism 5.

[0049] Further, referring to Figure 5 , the anti-falling mechanism 5 comprises a locking nut 51, a gasket 52 and a bolt 53. The gasket 52 is sleeved on the locking clamp 2, the second end of the locking clamp 2 is threadedly connected with the locking nut 51, and the gasket 52 is located between the fixing top plate 1 and the locking nut 51. The second end of the locking clamp 2 is provided with a pin hole, and the bolt 53 is sleeved in the pin hole. The nut is located between the bolt 53 and the gasket 52, which effectively prevents the locking nut 51 from loosening and separating from the second end of the locking clamp 2 under the conditions of train vibration, personnel stepping vibration and the like, thereby preventing the steel grating sidewalk step plate 3 from completely falling off, and improving the steel grating sidewalk step plate 3. The locking nut 51, the gasket 52 and the bolt 53 are simple in structure and easy to obtain, convenient to disassemble and assemble, and improve the installation efficiency of the fixing device.

[0050] As shown in Figure 6 and Figure 7 , the fixing top plate 1 comprises a first top plate 101 and a second top plate 102, and the first top plate 101 and the second top plate 102 are rotatably connected. Further, the first top plate 101 and the second top plate 102 are rotatably connected by a pin shaft to form a hinge structure. During installation, the fixing top plate 1 is folded by 180 degrees, the second end of the locking clamp 2 is pushed upward to pass through the steel grating sidewalk step plate 3, and then the fixing top plate 1 is folded again, the second through hole 12 on the second top plate 102 passes through the second end of the corresponding locking clamp 2, until the first top plate 101 and the second top plate 102 are coplanar, so that the staff can install and fix the second end of the locking clamp 2 on the steel grating sidewalk step plate 3.

[0051] AsFigure 2 As shown, the locking clamp 2 comprises a fixed arm 22 and a movable arm 23, the first end of the fixed arm 22 is hinged with the first end of the movable arm 23, the second end of the fixed arm 22 is connected with the first through hole 11 on the first top plate 101, and the second end of the movable arm 23 is detachably connected with the second through hole 12 on the second top plate 102 through the anti-disengagement mechanism 5.

[0052] Referring to Figure 8 and Figure 9 , during installation, the locking clamp 2 is first completely inserted into the first through hole 11 of the first end of the fixed top plate 1 to form a temporary assembly, then the temporary assembly is stacked at the designed installation position, the locking clamp 2 is inserted downward from the gap of the steel grating sidewalk step 3 and is in a free overhanging state after passing through the steel grating sidewalk step 3, and the fixed top plate 1 is placed on two adjacent steel grating sidewalk steps 3; the movable arm 23 of the locking clamp 2 can be manually pushed upward from the side of the steel grating sidewalk step 3, and the second top plate 102 of the fixed top plate 1 is folded to make the second through hole 12 fit into the end of the movable arm 23, and then the compression gasket 52 is installed, the locking nut 51 is tightened, and the anti-disengagement bolt 53 is inserted.

[0053] Preferably, referring to Figure 8 and Figure 9 , the fixed arm 22 and the movable arm 23 each comprise a first branch arm 221 and a second branch arm 222 connected with each other, and the second branch arm 222 of the fixed arm 22 is hinged with the second branch arm 222 of the movable arm 23. The included angle of the first branch arm 221 and the second branch arm 222 is greater than 90 degrees, and the sum of the thickness value of the horizontal angle steel 4 and the thickness value of the steel grating sidewalk step 3 is not greater than the length value of the first branch arm 221. The second branch arm 222 is in a cable-stayed state, which increases the area of the first top plate 101 and the second top plate 102 while ensuring that the first branch arm 221 can completely pass through the steel grating sidewalk step 3, and further improves the stability of the installation of the steel grating sidewalk step 3.

[0054] Referring to Figures 3 to 5 , the locking clamp 2 abuts against the bearing flat steel 31 of the steel grating sidewalk step 3, and the locking clamp 2 is transversely attached to the outer side of the bearing flat steel 31 of the adjacent steel grating sidewalk step 3, the bearing flat steel 31 provides transverse constraint for the lock catch to prevent transverse displacement of the lock catch, and further improves the transverse stability of the fixed top plate 1.

[0055] The device can ensure that the steel grating sidewalk step plate 3 can be reliably fixed on the existing bridge horizontal angle steel 4 without falling off, without changing the simply supported stress mode of the steel grating sidewalk step plate 3, without punching holes on the existing structure, and without generating harmful secondary internal force on the existing bridge horizontal angle steel 4. In addition, the lock buckle has simple structure, is convenient for single person to operate in high altitude, and has no risk of slipping and falling off in the installation and use process, and can be suitable for all scenes such as overpass bridges crossing busy roads.

[0056] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0057] In the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the present application, unless otherwise specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature is "above", "above" and "above" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0059] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0060] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A fixing device for a steel grating sidewalk step plate of a railway T-beam bridge, characterized in that, The fixing device of the steel grating sidewalk step plate of the railway T-beam bridge comprises: A fixed top plate (1) is arranged to abut the top surfaces of two adjacent steel grating sidewalk step plates (3); A plurality of locking clamps (2) are rotatably connected to the first end of the fixed top plate (1), and the second end of the locking clamps (2) is detachably connected to the second end of the fixed top plate (1); The locking clamps (2) are arranged to reversely straddle the bottom surface of the horizontal angle steel (4), the first end and the second end pass through the spaces between the corresponding steel grating sidewalk step plates (3) of the two adjacent steel grating sidewalk step plates (3), and the two ends of the fixed top plate (1) are connected to the two ends of the fixed top plate (1) one by one, and a plurality of locking clamps (2) are arranged in sequence.

2. The device for securing the steel grating pedestrian walkway tread of a railway T-beam bridge as claimed in claim 1, wherein, A plurality of first through holes (11) are formed in the fixed top plate (1) near the first end of the fixed top plate (1), and the first end of the plurality of locking clamps (2) is connected to the plurality of first through holes (11) one by one.

3. The device for securing the steel grating pedestrian walkway tread of a railway T-beam bridge as claimed in claim 2, wherein, The fixing device of the steel grating sidewalk step plate of the railway T-beam bridge comprises at least one pair of locking clamps (2), and the first end of each pair of locking clamps (2) is connected through a connecting arm (21) after passing through the corresponding first through hole (11).

4. The device for securing the steel grating pedestrian walkway tread of a railway T-beam bridge as recited in claim 1, wherein A plurality of second through holes (12) are formed in the fixed top plate (1) near the second end of the fixed top plate (1), and the second end of the plurality of locking clamps (2) is connected to the plurality of second through holes (12) one by one. The part of the second end of the locking clamps (2) extending out of the fixed top plate (1) is detachably connected with an anti-falling mechanism (5), and the anti-falling mechanism (5) abuts the top surface of the fixed top plate (1).

5. The device for securing the steel grating pedestrian walkway tread of a railway T-beam bridge as recited in claim 4, wherein The anti-falling mechanism (5) comprises a locking nut (51), a gasket (52) and a bolt (53); The gasket (52) is sleeved on the locking clamps (2), the second end of the locking clamps (2) is threadedly connected with the locking nut (51), and the gasket (52) is located between the fixed top plate (1) and the locking nut (51); The second end of the locking clamps (2) is provided with a pin hole, and the bolt (53) is sleeved in the pin hole, and the nut is located between the bolt (53) and the gasket (52).

6. The device for securing the steel grating pedestrian walkway tread of a railway T-beam bridge as claimed in any one of claims 1 to 5, characterized in that, The fixed top plate (1) comprises a first top plate (101) and a second top plate (102), and the first top plate (101) and the second top plate (102) are rotatably connected.

7. The railway T-girder bridge's steel grating sidewalk step plate fixing device according to claim 6, wherein, The first top plate (101) and the second top plate (102) are rotatably connected by a pin shaft to form a hinge structure.

8. The device for securing the steel grating pedestrian walkway tread of a railway T-beam bridge as claimed in any one of claims 1 to 5, wherein, The locking clamps (2) comprise a fixed arm (22) and a movable arm (23), the first end of the fixed arm (22) and the first end of the movable arm (23) are hingedly connected, the second end of the fixed arm (22) is connected with the first end of the fixed top plate (1), and the second end of the movable arm (23) is detachably connected with the second end of the fixed top plate (1).

9. The device for securing the steel grating pedestrian walkway tread of a railway T-beam bridge as recited in claim 8, wherein The fixed arm (22) and the movable arm (23) each comprise a first branch (221) and a second branch (222) connected to each other, and the second branch (222) of the fixed arm (22) is hinged to the second branch (222) of the movable arm (23). The included angle of the first branch (221) and the second branch (222) is greater than (90) degrees, and the sum of the thickness value of the horizontal angle steel (4) and the thickness value of the steel grating sidewalk step plate (3) is not greater than the length value of the first branch (221).

10. The device for securing the steel grating pedestrian walkway tread of a railway T-beam bridge as recited in claim 1, wherein The locking clamp (2) abuts against the bearing flat steel (31) of the steel grating sidewalk step plate (3).

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