A light rail large displacement telescopic device

Abstract

A light rail large displacement telescopic device, including a three-dimensional space bearing system supported by a support system and connected at both ends of the expansion joint through a beam system, the three-dimensional space bearing system includes N identical rectangular frames, the inner cavity of the rectangular frame is divided into upper frame, middle frame and lower frame; the support system includes upper and lower support systems with the same structure, the box body is located at both ends of the beam and connected with both ends of the expansion joint through the beam system, both ends of the beam are sleeved in the inner cavity of the box body and connected through the support slidingly fixed on the box body, N rectangular frames are evenly distributed on the beam between the left and right box bodies and are slidingly connected with the beam through the compression support, pressure support and side support fixedly connected in the inner cavity of the upper and lower frames, a limiting system and a displacement system are arranged in the rectangular frame. The telescopic device can meet the requirements of the standard JT / T327-2016 and the requirements of long single connection length, large displacement, high corner turning ability of the rail beam across the river.

Description

TECHNICAL FIELD

[0001] The present application relates to a light rail connecting member, in particular to a light rail large displacement expansion device. BACKGROUND

[0002] The expansion device commonly used at the expansion joint end of the light rail beam is a finger-shaped plate expansion device, which has the following problems:

[0003] (1) The finger-shaped plate expansion device is a cantilever structure, and the maximum displacement of the finger-shaped plate expansion device used in the project is not more than 200mm due to the limitation of the structure, and the gap between the finger-shaped plates is small, and the ability to rotate with the beam body is also small; the single length of the light rail track beam crossing a river is long, and the designed displacement is also large, far exceeding 200mm, and the requirement for the rotation angle is also high, so the conventional finger-shaped plate expansion device cannot meet the requirements of the light rail track beam crossing the river.

[0004] (2) The displacement of the conventional expansion device for highway bridges can be designed to be large, but only one surface bears the force, while the light rail expansion device requires three surface forces, so the conventional highway bridge expansion device cannot meet the requirements of the light rail track beam. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a light rail large displacement expansion device to overcome the above-mentioned deficiencies of the prior art.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is:

[0007] A light rail large displacement expansion device, comprising a three-dimensional space bearing system, a displacement system, a limiting system, a support system and a connecting beam system; the three-dimensional space bearing system is supported by the support system and connected at both ends of the light rail beam expansion joint through the connecting beam system; the three-dimensional space bearing system is used for connecting the two ends of the light rail beam expansion joint, and adapts to the expansion and contraction of the light rail beam; the limiting system is used for limiting the amplitude of the three-dimensional space bearing system, and when the expansion device is elongated, the gap opening size between each rectangular frame is not greater than 80mm; the displacement system is used for controlling the uniformity of the displacement of the expansion device.

[0008] The three-dimensional space bearing system comprises N rectangular frames which are supported side by side on the support system and have a certain width, and a displacement gap of ±40mm is formed between the adjacent two rectangular frames, a strip-shaped tooth plate is anchored on the top surface and the upper and lower parts of the two outer sides of the rectangular frame, and an upper cross arm and a lower cross arm with the same width as the rectangular frame are connected to the upper waist and lower waist of the rectangular frame respectively, so as to separate the rectangular frame into an upper frame, a middle frame and a lower frame.

[0009] The support system comprises an upper support system and a lower support system, the upper support system and the lower support system are structurally identical, comprising a crossbeam, a box, a compression support, a pressure support and a side support, the box is located at both ends of the support system crossbeam and is connected with both ends of the light rail beam expansion joint through the connecting beam system, both ends of the crossbeam are respectively sleeved in the inner cavity of the box, the top surface of the crossbeam is slidably connected with the compression support fixedly connected to the top plate of the box, and the bottom surface of the crossbeam is slidably connected with the pressure support fixedly connected to the bottom plate of the box, the N rectangular frames are uniformly distributed on the crossbeam between the left and right two boxes, the crossbeam of the upper support system penetrates into the upper frame, and is slidably connected with the compression support, the pressure support and the side support fixedly connected to the upper and lower front and rear sides of the inner cavity of the upper frame, and the crossbeam of the lower support system penetrates into the lower frame, and is slidably connected with the compression support, the pressure support and the side support fixedly connected to the upper and lower front and rear sides of the inner cavity of the lower frame.

[0010] The displacement system is connected in the front and rear sides of the inner cavity of the middle frame through anchor bolts, and comprises 2 (N-2) displacement units which are structurally identical, the displacement unit comprises a connecting plate, a right displacement shear spring, a left displacement shear spring and a connecting cylinder, the connecting cylinder of the first displacement unit is connected to the inner side of the middle frame of the second rectangular frame, the right displacement shear spring and the left displacement shear spring of the first displacement unit are respectively connected to the same side of the inner cavity of the middle frame of the first rectangular frame and the third rectangular frame, the connecting cylinder of the second displacement unit is connected to the same side of the inner cavity of the middle frame of the third rectangular frame, the right displacement shear spring and the left displacement shear spring of the second displacement unit are respectively connected to the same side of the inner cavity of the middle frame of the second rectangular frame and the fourth rectangular frame, and so on.

[0011] The limiting system comprises anchor bolts and a limiting belt, and the limiting belt is fixed to the bottom surface of the upper crossbeam and the top surface of the lower crossbeam of two adjacent rectangular frames through the anchor bolts.

[0012] The connecting beam system comprises a connecting beam steel plate and connecting bolts, and the connecting beam steel plate is provided with bolt holes.

[0013] The value of N is any integer between 4 and 38.

[0014] Further, the upper and lower front and rear sides of the crossbeam, which are slidably connected with the compression support, the pressure support and the side support, are welded with stainless steel plates.

[0015] Further, the box is fixedly connected with a rib plate on the outside, and the expansion device is connected to both ends of the light rail beam expansion joint through the connecting beam system during installation, one end of the connecting steel plate of the connecting beam system is connected with the rib plate on the outside of the box, and the other end of the connecting steel plate is connected with the pre-buried plate seat at both ends of the light rail beam expansion joint through anchor bolts.

[0016] Further, vertical connecting rods are connected between the boxes of the upper support system and the lower support system.

[0017] The limiting belt is a chain, a hinge or a trailer belt.

[0018] The support system pressure bearing adopts a spherical steel bearing.

[0019] Compared with the prior art, the light rail large displacement expansion device has the following beneficial effects due to the adoption of the above structure:

[0020] 1. The three-dimensional space bearing system of the present application is designed according to the displacement amount, and a plurality of rectangular frames are arranged side by side, a displacement gap of ±40mm is formed between the two rectangular frames, and the displacement amount can reach the maximum of 3000mm specified in the JT / T327-2016 standard; and the support system pressure bearing adopts a spherical steel bearing, which has a super strong space displacement capacity, so as to meet the demand of "long single length of the track beam across the river, the designed displacement amount is also very large, far exceeding 200mm, and the requirement for the corner turning capacity is also very high";

[0021] 2. The three-dimensional space bearing system of the expansion device is designed as a rectangular frame structure, which meets the demand of three-face bearing of light rail, and a strip-shaped tooth plate is arranged on the top surface and the two outer sides of the frame to achieve the effect of noise reduction;

[0022] 3. The displacement system and the limiting system of the expansion device are separated, the displacement system is located on the left and right surfaces of the inner side of the rectangular frame (the middle square), which is composed of displacement shear springs and connecting plates, and the limiting system is located on the upper cross arm below and the lower cross arm above the inner side of the rectangular frame, which is fixed to the rectangular frame through anchor bolts, so as to ensure the uniformity of the gap expansion between each unit frame, and the expansion device can meet the engineering requirements of normal expansion of the beam body;

[0023] 4. The support system of the expansion device is designed as a single beam structure, including upper and lower support systems, which ensures the order of space linkage and the balance of three-face stress;

[0024] 5. The top surface and the side surface of the expansion device are connected to the embedded base of the track beam body through the connecting beam system, which is convenient and fast to install, reasonably bears the stress, and is convenient for product maintenance.

[0025] In the following, the technical features of the light rail large displacement expansion device will be further described in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figures 1-4 It is a light rail large displacement expansion device structure schematic diagram:

[0027] Figure 1 It is Figure 2 A-A view, Figure 2 front view, Figure 3 left view, Figure 2 left view, Figure 4 right view,Figure 2 Figure 1 is a perspective view of the three-dimensional space bearing system;

[0028] Figures 5-7 Figure 2 is a schematic diagram of the three-dimensional space bearing system structure;

[0029] Figure 5 Figure 3 is a side view, Figure 6 Figure 4 is a Figure 5 Figure 5 is a plan view, Figure 7 Figure 6 is a Figure 5 Figure 7 is a left view of the three-dimensional space bearing system;

[0030] Figure 8 Figure 8 is a schematic diagram of the limiting system structure;

[0031] Figures 9-10 Figure 9 is a schematic diagram of the displacement system structure;

[0032] Figure 9 Figure 10 is a front view, Figure 10 Figure 11 is a plan view;

[0033] Figures 11-14 Figure 12 is a schematic diagram of the support system structure;

[0034] Figure 11 Figure 13 is a Figure 12 Figure 14 is a C-C view of the three-dimensional space bearing system, Figure 12 Figure 15 is a side view, Figure 13 Figure 16 is a Figure 12 Figure 17 is a B-B view of the three-dimensional space bearing system, Figure 14 Figure 18 is a Figure 12 Figure 19 is a plan view of the three-dimensional space bearing system;

[0035] Figures 15-16 Figure 20 is a schematic diagram of the coupling beam system structure;

[0036] Figure 15 Figure 21 is a front view, Figure 16 Figure 22 is a plan view;

[0037] In the drawings: 1 - three-dimensional space bearing system, 11 - rectangular frame, 111 - upper frame, 112 - middle frame, 113 - lower frame, 12 - upper cross beam, 13 - lower cross beam, 14 - strip-shaped tooth plate, 2 - displacement system, 21 - connecting plate, 22 - right displacement shear spring, 23 - left displacement shear spring, 24 - connecting cylinder, 3 - limiting system, 31 - bolt, 32 - limiting belt, 4 - support system, 41 - cross beam, 42 - box body, 43 - compression support, 44 - pressure bearing support, 45 - side support, 46 - vertical connecting rod, 5 - coupling beam system, 51 - coupling beam steel plate, 52 - connecting bolt, 53 - bolt hole, 6 - rib plate. DETAILED DESCRIPTION

[0038] A light rail large displacement telescopic device, comprising a three-dimensional space bearing system 1, a displacement system 2, a limiting system 3, a support system 4 and a connecting beam system 5; the three-dimensional space bearing system is supported by the support system and connected at both ends of the light rail beam expansion joint through the connecting beam system;

[0039] The three-dimensional space bearing system is used for connecting at both ends of the light rail beam expansion joint and adapting to the expansion and contraction of the light rail beam; the limiting system is used for limiting the amplitude of the three-dimensional space bearing system; when the telescopic device is in elongation, the gap opening size between the rectangular frames is not greater than 80mm; the displacement system is used for controlling the uniformity of the displacement of the telescopic device;

[0040] The three-dimensional space bearing system 1 comprises N rectangular frames 11 which are supported on the support system in parallel and have the same width, and a displacement gap of ±40mm (thermal expansion and contraction, +40mm represents compression and -40mm represents stretching) is formed between the adjacent two rectangular frames 11; a strip-shaped tooth plate 14 is anchored on the top surface and the upper and lower parts of the two outer sides of the rectangular frame 11; an upper cross arm 12 and a lower cross arm 13 which have the same width as the rectangular frame are connected to the upper waist and lower waist of the rectangular frame respectively, so as to separate the rectangular frame into an upper frame 111, a middle frame 112 and a lower frame 113;

[0041] The support system 4 comprises an upper support system and a lower support system, the upper support system and the lower support system have the same structure and comprise a cross beam 41, a box 42, a compression support 43, a pressure bearing 44 and a side support 45; the box is located at both ends of the support system cross beam and connected with both ends of the light rail beam expansion joint through the connecting beam system; the cross beam is sleeved in the inner cavity of the box at both ends, the top surface of the cross beam is slidably connected with the compression support fixedly connected to the top plate of the box, and the bottom surface of the cross beam is slidably connected with the pressure bearing fixedly connected to the bottom plate of the box; the N rectangular frames are evenly distributed on the cross beam between the left and right boxes; the cross beam of the upper support system penetrates into the upper frame 111 of the rectangular frame 11 and is slidably connected with the compression support, the pressure bearing and the side support fixedly connected to the inner cavity of the upper frame; the cross beam of the lower support system penetrates into the lower frame 113 of the rectangular frame 11 and is slidably connected with the compression support, the pressure bearing and the side support fixedly connected to the inner cavity of the lower frame;

[0042] The displacement system 2 is connected by anchor bolts on the front and back sides of the inner cavity of the rectangular frame in the middle box 112, and includes 2(N-2) displacement units of the same structure, wherein (N-2) are installed on the front side of the inner cavity of the rectangular frame in the middle box 112, and (N-2) are installed on the back side of the inner cavity of the rectangular frame in the middle box 112. The displacement unit includes a connecting plate 21, a right displacement shear spring 22, a left displacement shear spring 23, and a connecting cylinder 24. When installed, the connecting cylinder of the first displacement unit is connected to the front side or back side of the inner cavity of the second rectangular frame in the middle box, and the right displacement shear spring 22 and the left displacement shear spring 23 are respectively connected to the same side of the inner cavity of the first and third rectangular frames in the middle box. The connecting cylinder of the second displacement unit is connected to the same side of the inner cavity of the third rectangular frame in the middle box, and the right displacement shear spring 22 and the left displacement shear spring 23 are respectively connected to the same side of the inner cavity of the second and fourth rectangular frames in the middle box. Similarly, the connecting cylinder of the third displacement unit is connected to the same side of the inner cavity of the fourth rectangular frame in the middle box, and the right displacement shear spring 22 and the left displacement shear spring 23 are respectively connected to the same side of the inner cavity of the third and fifth rectangular frames in the middle box.

[0043] The limiting system 3 includes anchor bolts and a limiting belt, and the limiting belt is fixed on the bottom surface of the upper cross beam and the top surface of the lower cross beam of two adjacent rectangular frames by anchor bolts.

[0044] The connecting beam system 5 includes a connecting beam steel plate 51 and a connecting bolt 52, and the connecting beam steel plate is provided with a bolt hole 53.

[0045] The upper, lower, front, and back sides of the cross beam and the compression support, pressure support, and side support are slidably connected and welded with stainless steel plates, so as to bear three-side load and ensure that the rectangular frame can normally slide.

[0046] The box body is fixedly connected with a rib plate 6, and the expansion device is connected at both ends of the light rail beam expansion joint by the connecting beam system 5. One end of the connecting steel plate 51 of the connecting beam system is connected with the rib plate 6 on the outer side of the box body, and the other end of the connecting steel plate is connected with the embedded plate seat at both ends of the light rail beam expansion joint by anchor bolts. The box bodies of the upper support system and the lower support system are connected with vertical connecting rods 46. The limiting belt 32 is a chain, a hinge, or a trailer belt. The pressure support of the support system is a spherical steel support.

[0047] In the embodiment, the three-dimensional space bearing system 1 includes five rectangular frames 11 of the same structure and having a certain width, which are supported side by side on the support system. The upper frame 111 of the rectangular frame 11 and the top surface of the inner cavity of the lower frame are fixedly connected with two compression supports, the bottom surface is fixedly connected with two pressure supports, and the front and back sides are respectively fixedly connected with one side support. The cross beam of the upper support system penetrates the upper frame and is slidably connected with the compression support, pressure support, front support, and side support of the rectangular frame 11. The cross beam of the lower support system penetrates the lower frame 113 and is slidably connected with the compression support, pressure support, front support, and side support of the rectangular frame 11.

[0048] Correspondingly, the present embodiment includes 2 (5-2) = 6 displacement units of the same structure, and each of the front and back sides of the middle square frame is connected with 3 displacement units.

[0049] As a variation of the above embodiment, the number N of the rectangular frames can be any integer between 4 and 38.

Claims

1. A large displacement telescopic device for light rail, characterized in that: It includes a three-dimensional spatial load-bearing system (1), a displacement system (2), a limiting system (3), a support system (4), and a connecting beam system (5); the three-dimensional spatial load-bearing system is supported by the support system and connected to both ends of the light rail beam expansion joint through the connecting beam system; The three-dimensional spatial load-bearing system is used to connect the two ends of the expansion joint of the light rail beam, and adapts to the thermal expansion and contraction of the light rail beam; the limiting system is used to limit the expansion and contraction range of the three-dimensional spatial load-bearing system, and when the expansion device extends, the gap opening size between each rectangular frame is no greater than 80mm; the displacement system is used to control the uniformity of the displacement of the expansion device. The three-dimensional spatial load-bearing system (1) includes N rectangular frames (11) with the same structure and a certain width, which are supported side by side on the support system. A displacement gap of ±40mm is formed between two adjacent rectangular frames (11). The top surface and the upper and lower parts of the two outer sides of the rectangular frame (11) are anchored with strip toothed plates (14). The upper waist and lower waist of the rectangular frame are respectively connected with an upper crossbeam (12) and a lower crossbeam (13) with the same width as the rectangular frame, thereby dividing the rectangular frame into an upper frame (111), a middle frame (112) and a lower frame (113). The support system (4) includes an upper support system and a lower support system. The upper support system and the lower support system have the same structure, including a crossbeam (41), a box body (42), a clamping support (43), a pressure bearing support (44), and a side support (45). The box body is located at both ends of the crossbeam of the support system and is connected to both ends of the light rail beam expansion joint through a connecting beam system. The two ends of the crossbeam are respectively fitted into the inner cavity of the box body. The top surface of the crossbeam is slidably connected to the clamping support fixed to the top plate of the box body, and the bottom surface of the crossbeam is slidably connected to the pressure bearing support fixed to the bottom plate of the box body. The N rectangular frames are evenly distributed on the crossbeam between the left and right boxes. The crossbeam of the upper support system passes through the upper frame (111) of the rectangular frame (11) and is slidably connected to the pressing support, bearing support and side support fixedly connected to the upper and lower front and rear sides of the upper frame cavity. The crossbeam of the lower support system passes through the lower frame (113) of the rectangular frame (11) and is slidably connected to the pressing support, bearing support and side support fixedly connected to the upper and lower front and rear sides of the lower frame cavity. The displacement system (2) is connected to the front and rear sides of the inner cavity of the square frame (112) of the rectangular frame by anchor bolts. It includes 2 (N-2) displacement units with the same structure. The displacement unit includes a connecting plate (21), a right displacement shear spring (22), a left displacement shear spring (23) and a connecting cylinder (24). The connecting cylinder of the first displacement unit is connected to the inner side of the square frame of the second rectangular frame. Its right displacement shear spring (22) and left displacement shear spring (23) are respectively connected to the same side of the square frame of the first and third rectangular frames. The connecting cylinder of the second displacement unit is connected to the same side of the square frame of the third rectangular frame. Its right displacement shear spring (22) and left displacement shear spring (23) are respectively connected to the same side of the square frame of the second and fourth rectangular frames, and so on. The limiting system (3) includes anchor bolts and limiting bands, the limiting bands being fixed to the bottom surface of the upper crossbeam and the top surface of the lower crossbeam of two adjacent rectangular frames by anchor bolts; The connecting beam system (5) includes a connecting beam steel plate (51) and connecting bolts (52), and bolt holes are opened on the connecting beam steel plate; The value of N can be any integer between 4 and 38.

2. The light rail large displacement telescopic device as described in claim 1, characterized in that: The upper, lower, front, and rear sides of the crossbeam, which are slidably connected to the clamping support, the pressure bearing support, and the side support, are all welded with stainless steel plates.

3. A light rail large displacement telescopic device as described in claim 1 or 2, characterized in that: The outer side of the box is fixedly connected with stiffening plates (6). During installation, the expansion device is connected to both ends of the light rail beam expansion joint through the connecting beam system (5). One end of the connecting steel plate (51) of the connecting beam system is connected to the stiffening plates (6) on the outer side of the box, and the other end of the connecting steel plate is connected to the pre-embedded plate seats at both ends of the light rail beam expansion joint through anchor bolts.

4. The light rail large displacement telescopic device as described in claim 3, characterized in that: A vertical connecting rod (46) connects the upper support system and the lower support system housing.

5. A light rail large displacement telescopic device as described in claim 4, characterized in that: The limiting band (32) is a chain, hinge, or trailer belt.

6. The light rail large displacement telescopic device as described in claim 5, characterized in that: The pressure bearing support of the support system adopts spherical steel support.

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