Adjustable height earthquake-resistant spherical steel bearing for rail transit

Abstract

The camshaft of the embodiment of the present invention is characterized in that the camshaft is provided with a plurality of grooves at the bottom of the beam, and the grooves are provided at the bottom of the beam, and the camshaft is provided with a plurality of grooves at the bottom of the beam, and the grooves are ...

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to an adjustable height earthquake-resistant spherical steel bearing for rail transit of a rail transit bridge. Background Art

[0002] With the large-scale development of rail transit in my country, the demand for rail transit is increasing, and the design speed of rail transit is also increasing. It has now reached a design speed of 200km / h. Therefore, rail transit has high requirements for the straightness of the line. Due to the settlement of the bridge foundation, the bridge elevation changes, which affects the straightness of the track. The bearings need to be adjusted regularly. At present, the common support height adjustment schemes at home and abroad include pad height adjustment, spiral height adjustment, wedge height adjustment and injection filling body height adjustment. Among them, the pad height adjustment method is the most widely used and simplest height adjustment method. The existing pad height adjustment bearing is heightened by adding a height adjustment pad between the bearing and the bottom of the beam. Therefore, the bolts anchoring the bearing and the beam body need to reserve the length required to meet the maximum height adjustment of the bearing. In order to meet the installation space of the anchor bolt, the design height of the bearing increases with the increase of the height adjustment, resulting in high cost and poor economy of the bearing in the pad height adjustment method. At the same time, as the height adjustment of the support increases, the thread engagement length of the support anchor bolt increases, the disassembly and assembly speed is slow when the support is adjusted, and the low height adjustment efficiency affects the line operation. In addition, the existing support dustproof enclosure is made of polyurethane or rubber material and is set on the outside of the support. Covering the anchor bolts on the support in the dust cover is not convenient for daily inspection and maintenance of the support. When the support is adjusted, the dustproof enclosure must be removed before the support can be adjusted. This has low efficiency, and the dustproof enclosure has poor durability and needs to be replaced frequently, resulting in high operating and maintenance costs.

[0003] To this end, in view of the above-mentioned defects, the designers of the present invention have devoted themselves to research and design, and combined the experience and achievements of many years in related industries to research and design an adjustable height earthquake-resistant spherical steel bearing for rail transit to overcome the above-mentioned defects. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable height earthquake-resistant spherical steel bearing for rail transit, which can effectively solve the problems of existing adjustable height bearings such as increased bearing height due to increased height adjustment, poor economy, and low operating efficiency, so as to achieve convenient height adjustment of the bearing, good economy, and significantly improved height adjustment operating efficiency.

[0005] To achieve the above-mentioned purpose, the present invention discloses an adjustable height anti-seismic spherical steel bearing for rail transit, comprising an upper seat plate assembly, a middle seat plate assembly, a lower seat plate assembly, an anchor assembly, a height adjustment device and a protective device. The lower seat plate assembly at the bottom is connected to the pier through an anchor bolt assembly, and the upper seat plate assembly at the top is connected to the beam body through the height adjustment device, and is characterized in that:

[0006] The height-adjusting device comprises an upper sleeve, a pressure block and an anchor rod. The lower part of the upper sleeve is embedded in the embedded plate at the bottom of the beam. A plurality of annular grooves are arranged at intervals on the inner wall of the upper sleeve. The upper surface of the anchor rod and the lower surface of the pressure block are respectively provided with a plurality of conical grooves. Each pair of relatively arranged conical grooves forms a conical space for placing pressure balls respectively. Each pressure ball is embedded in the groove to form expansion and fixation to transmit the axial force of the anchor rod. A washer is arranged at the adjusting bolt nut, and a locking is arranged.

[0007] A protective device is also provided in the upper support assembly. The protective device is formed by pressing a plate and surrounds the friction pair of the support inside the support.

[0008] Wherein: the center of the anchor rod is provided with a through inner hole for the adjustment bolt to pass through, the pressure block is provided with an internal thread to cooperate with the adjusting bolt thread, and the relative movement of the pressure block relative to the anchor rod and the radial movement of the pressure ball are realized through the spiral cooperation of the adjusting bolt and the pressure block. The lower end of the anchor rod is provided with a step hole for accommodating and positioning the head of the adjusting bolt, and the lower part of the anchor rod is also provided with an external thread to cooperate with a nut for fastening the upper seat plate.

[0009] Wherein: the lower part of the anchor rod is provided with one or more pairs of parallel planes to facilitate the twisting of the anchor rod.

[0010] Wherein: the adjusting bolt is a hexagon socket head bolt.

[0011] Wherein: the lower outer edge of the anchor rod is also provided with a protective sleeve, and the protective sleeve is provided with an internal thread matching the external thread of the anchor rod.

[0012] Wherein: the pressing block is provided with at least one pin hole for the anti-rotation pin to be inserted, and the anchor rod is correspondingly provided with at least one groove to accommodate the head of the anti-rotation pin.

[0013] Wherein: the pressure ball is in the shape of a sphere or a curved rotation body, and a center hole is provided in the center of each pressure ball. An annular elastic ring passes through the center hole of each pressure ball to connect multiple pressure balls into one. Therefore, when each pressure ball moves radially, the elastic ring can realize the relative position positioning of the pressure ball when it is extended outward and the rapid and stable reset when it is retracted inward through the expansion and recovery effect of the elastic ring.

[0014] Among them: the upper surface of the anchor rod of the height adjustment device is provided with 4 conical grooves arranged at 90 degrees, and the lower surface of the pressure block installed on the anchor rod is also provided with 4 corresponding conical grooves, and 4 pressure balls are installed in the 4 pairs of conical grooves, and each pressure ball is connected as a whole through an annular elastic ring passing through the center hole.

[0015] Wherein: the protective device is combined with the upper seat plate and fixed by bolt connection or welding.

[0016] Wherein: the anchor assembly consists of an anchor bolt, a sleeve and an anchor screw.

[0017] From the above content, it can be known that the adjustable height earthquake-resistant spherical steel bearing for rail transit of the present invention has the following effects:

[0018] 1) It can be applied to the needs of large height adjustment of supports. The height of the support does not change with the change of the height adjustment amount, which has good economy and cost performance.

[0019] 2) The height adjustment operation is simple and convenient. Tightening and loosening can be achieved quickly by turning the adjusting bolt. The axial position can be adjusted and fixed, which greatly improves the operating efficiency of the support height adjustment. It has the advantages of high height adjustment efficiency, short cycle and low cost.

[0020] 3) It has excellent dust-proof effect, which can effectively protect the friction pair of the bridge bearing, prevent dust and foreign matter from entering the friction pair surface, and ensure the long-term use of the bearing; the height-adjusting device is placed outside the bearing protection device and a protective cover is used to seal and protect the exposed part of the height-adjusting device and prevent the adjustment bolts from loosening, which is convenient for daily inspection and height adjustment of the bearing, so as to achieve the purpose of easy maintenance of the bearing and reduce the maintenance cost of the bearing.

[0021] The details of the present invention can be obtained from the following description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of one embodiment of the adjustable height earthquake-resistant spherical steel bearing for rail transit of the present invention is shown.

[0023] Figure 2 The schematic diagram of the structure of the height adjustment device of the present invention is shown.

[0024] Figure 3 The figure shows the structural schematic diagram of the height adjustment device of the present invention after height adjustment.

[0025] Figure 4 A top view of the anchor rod assembly of the height adjustment device of the present invention is shown.

[0026] Figure 5 The CC cross-sectional view of the anchor rod assembly of the height adjusting device of the present invention is shown.

[0027] Figure 6 A bottom view of the anchor rod assembly of the height adjustment device of the present invention is shown.

[0028] Figure 7 A schematic diagram of the combination of the upper seat plate assembly and the protective device of the present invention is shown.

[0029] Figure 8 A schematic diagram of the protective device of the present invention is shown.

[0030] Reference numerals:

[0031] 1——upper sleeve, 2——pressure block, 3——pressure ball, 4——elastic ring, 5——adjusting bolt, 6——anchor rod, 7——embedded plate at the bottom of beam, 8——upper seat plate assembly, 9——nut, 10——anti-rotation pin, 11——protective cover, 12——middle seat plate assembly, 13——lower seat plate assembly, 14——protective device, 15——anchor assembly, 16——height adjustment pad, 17——locking screw, 18——washer. DETAILED DESCRIPTION

[0032] See also Figures 1 to 8 , showing the adjustable height earthquake-resistant spherical steel bearing for rail transit of the present invention.

[0033] See also Figure 1 The adjustable height earthquake-resistant spherical steel bearing for rail transit may include an upper seat plate assembly 8, a middle seat plate assembly 12, a lower seat plate assembly 13, an anchor assembly 15, a height adjustment device and a protective device 14. The upper seat plate assembly 8, the middle seat plate assembly 12 and the lower seat plate assembly 13 are arranged in sequence from top to bottom to form a spherical steel bearing body. Its specific structure is the same as the existing one and will not be described here. The lower seat plate assembly 13 is connected to the pier through the anchor bolt assembly 15, and the upper seat plate assembly 8 is connected to the beam body through the height adjustment device The anchoring between the support and the beam body is carried out by using a retractable height-adjusting device. Therefore, when the support is adjusted, the extension and retraction of the height-adjusting device can solve the support anchoring problem caused by adding height-adjusting pads of different thicknesses to the support. A built-in protective device can also be provided to protect the internal structure of the support and effectively prevent dust and foreign matter from entering the sliding surface of the support, thereby ensuring that the height-adjusting device of the support is outside the support protective device, thereby facilitating the height-adjusting operation of the support. At the same time, a protective suit is used to seal and protect the exposed part of the height-adjusting device of the support.

[0034] Also see Figure 2 , Figure 3 and Figure 4 The height adjustment device may include an upper sleeve 1, a pressure block 2, an adjustment bolt 5 and an anchor rod 6. The lower part of the upper sleeve 1 is embedded in the beam bottom embedded plate 7, so that it is cast at the bottom of the beam together with the beam bottom embedded plate 7 to form a beam body anchor body. A plurality of annular grooves are arranged on the inner wall of the upper sleeve 1 at intervals. The annular grooves at different positions are used for anchoring the support for different height adjustment amounts.

[0035] The outer walls of the pressing block 2 and the anchor rod 6 cooperate with the inner wall of the upper sleeve 1 and are arranged up and down in the upper sleeve 1. The upper surface of the anchor rod 6 and the lower surface of the pressing block 2 are respectively provided with a plurality of conical grooves. Each pair of relatively arranged conical grooves forms a conical space for placing the pressing balls 3 respectively. Through the movement and pressure of the pressing block 2 relative to the anchor rod 6, each pressing ball 3 can move radially along the conical space in the relative conical grooves. Each pressing ball 3 moves outward until the outer side of the pressing ball 3 exceeds the outer wall of the pressing block 2 and the anchor rod 6 and cooperates with one of the grooves on the inner wall of the upper sleeve 1, so that the pressing ball is embedded in the groove to form expansion and fixation to transmit the axial force of the anchor rod 6.

[0036] See also Figure 5 and Figure 6 The center of the anchor rod 6 is provided with a through inner hole for an adjusting bolt 5 to pass through. The pressure block 2 is provided with an internal thread to cooperate with the thread of the adjusting bolt 5. The relative movement of the pressure block 2 relative to the anchor rod 6 and the radial movement of the pressure ball 3 are realized through the spiral cooperation of the adjusting bolt 5 and the pressure block 2. The lower end of the anchor rod 6 is provided with a step hole to accommodate and position the head of the adjusting bolt 5. The lower part of the anchor rod 6 is also provided with an external thread to cooperate with a nut 9 for fastening the upper seat plate 8. In order to prevent the anchor rod 6 from rotating relative to each other during the tightening of the nut 9, a pair or more pairs of parallel planes are also provided at the lower part of the anchor rod 6, which is convenient for using a wrench or other tools to screw the anchor rod 6.

[0037] The pressure ball 3 is in the shape of a sphere or other curved rotating body, and a center hole is provided in the center of each pressure ball 3. An annular elastic ring 4 passes through the center hole of each pressure ball 3 to connect the multiple pressure balls 3 into one. Therefore, when each pressure ball 3 moves radially, the elastic ring 4 can be used to expand and contract and restore the pressure ball 3 to a relative position when it is extended and quickly and stably reset when it is retracted, thereby avoiding positional misalignment of the pressure balls 3 and better realizing the positioning of the pressure balls and the stable transmission of the axial force.

[0038] The adjusting bolt 5 is a hexagon socket head bolt, and an external thread is provided on the upper part of the adjusting bolt 5 to match the internal thread provided on the center of the pressing block 2.

[0039] The lower outer edge of the anchor rod 6 is also provided with a protective sleeve 11, which is a steel sleeve with excellent corrosion resistance and is provided with an internal thread that matches the external thread of the anchor rod 6, so as to provide protection by being fixedly connected with the anchor rod through the thread.

[0040] The pressure block 2 may be provided with at least one pin hole for the anti-rotation pin 10 to be inserted, and the anchor rod 6 may be correspondingly provided with at least one groove to accommodate the head of the anti-rotation pin 10, so that the pressure ball can provide an anti-rotation effect after entering the groove.

[0041] The nut of the adjusting bolt 5 is provided with a washer 18 and a locking screw 17 to prevent the adjusting bolt 5 from loosening due to rotation.

[0042] In the illustrated embodiment, the upper surface of the anchor rod 6 of the height adjustment device is provided with four conical grooves arranged at 90 degree intervals, and the lower surface of the pressure block 2 installed on the anchor rod 6 is also provided with four corresponding conical grooves, and four pressure balls 3 are installed in the four pairs of conical grooves. Each pressure ball 3 is connected to each other through an annular elastic ring 4 passing through the center hole. The adjusting bolt 5 passes through the anchor rod 6 and is connected by threads. The upper part of the anchor rod 6 extends into the interior of the sleeve 1. By tightening the adjusting bolt 5, the pressure block 2 moves downward, pushing the pressure ball 3 to move outward and enter the groove on the inner hole of the sleeve 1, forming expansion and fixation, and fixing the anchor rod 6 inside the sleeve 1.

[0043] When the support needs to be raised, the operation steps are as follows: remove the protective cover 11 and the nut 9, reversely screw the adjusting bolt 5, the adjusting bolt 5 drives the pressure block 2 to move upward, and releases the pressure on the pressure ball 3. The pressure ball 3 is separated from the sleeve 1 under the action of the elastic ring 4 and shrinks in the conical groove of the anchor rod 6 and the pressure block 2. The anchor rod assembly is pushed into the sleeve 1 so that the lower end surface of the anchor bolt 6 does not expose the lower surface of the sleeve 1. The adjusting bolt 5 is tightened forward to temporarily fix the anchor rod assembly in the sleeve 1. The hydraulic jack is used to lift the beam body, and the height adjustment pad 16 is added to make the adjustment The anchor hole of the high pad 16 is aligned with the anchor hole of the support, the hydraulic jack relieves pressure, the beam falls back, the adjusting bolt 5 is turned in the reverse direction, the anchor rod assembly is loosened, the anchor rod 6 is moved down, exposing the appropriate length of the lower bottom surface of the support upper plate, and when the adjusting bolt 5 is turned forward, the pressure block 2 moves downward, pushing the pressure ball 3 to move downward and outward along the tapered groove of the anchor rod 6 and the pressure block 2. At this time, the anchor rod 6 is slightly adjusted up and down so that the pressure ball 3 is in the groove of the sleeve 1, and the adjusting bolt 5 continues to be turned forward to fix the anchor rod 6, install the nut 9 and tighten it, and the support height adjustment is completed.

[0044] The present invention is not limited to this embodiment, and the bearing may include a spherical bearing, a pot-type rubber bearing, a seismic isolation bearing, etc.

[0045] Among them, see Figure 7 and Figure 8 As shown, the upper support assembly 8 is further provided with a protective device 14, which is pressed from a plate with good corrosion resistance, and surrounds the friction pair of the support inside the support. The protective device 14 is fixed to the upper seat plate assembly 8 by bolt connection or welding.

[0046] The anchor assembly 15 is composed of a foundation bolt, a sleeve and an anchor screw.

[0047] It can be seen that the support of the present invention is fixed to different positions of the sleeve 1 by the anchor rod 6 to realize the anchor connection with the upper seat plate 8 when different height adjustment amounts are achieved. There is no need to lengthen the anchor bolt design due to the height adjustment amount, and increase the support height. The support and the bottom sleeve of the beam transmit horizontal force through the anchor rod 6, which can realize the height adjustment of the bridge structure in large settlement areas. The support is clearly stressed, and the height adjustment operation is convenient and fast. It can effectively save the support manufacturing cost and height adjustment operation cost, and has good economic and social significance.

[0048] It is obvious that the above description and record are only examples and are not intended to limit the disclosure, application or use of the present invention. Although the embodiments have been described in the embodiments and described in the drawings, the present invention is not limited to the specific examples of the teachings of the present invention as the best mode currently considered by the drawings and described in the embodiments, and the scope of the present invention will include any embodiment falling within the previous description and the attached claims.

Claims

1. An adjustable height earthquake-resistant spherical steel bearing for rail transit, comprising an upper seat plate assembly, a middle seat plate assembly, a lower seat plate assembly, an anchor assembly and a height adjustment device, wherein the lower seat plate assembly at the bottom is connected to the pier through an anchor bolt assembly, and the upper seat plate assembly at the top is connected to the beam body through the height adjustment device, characterized in that: The height adjustment device comprises an upper sleeve, a pressure block and an anchor rod, the lower part of the upper sleeve is embedded in the beam bottom embedded plate, a plurality of annular grooves are arranged on the inner wall of the upper sleeve, the upper surface of the anchor rod and the lower surface of the pressure block are respectively provided with a plurality of conical grooves, each pair of oppositely arranged conical grooves forms a conical space for placing pressure balls respectively, each pressure ball is embedded in the groove to form expansion and fixation to transmit the axial force of the anchor rod; a washer is arranged at the adjusting bolt nut, and a locking screw is arranged to prevent the loosening caused by the rotation of the adjusting bolt; The upper seat plate assembly is also provided with a protective device, which is pressed from a plate and surrounds the friction pair of the support inside the support; The center of the anchor rod is provided with a through inner hole for the adjustment bolt to pass through, the pressure block is provided with an inner thread to cooperate with the adjustment bolt thread, and the relative movement of the pressure block relative to the anchor rod and the radial movement of the pressure ball are achieved through the spiral cooperation of the adjustment bolt and the pressure block. The lower end of the anchor rod is provided with a stepped hole for accommodating and positioning the head of the adjustment bolt, and the lower part of the anchor rod is also provided with an outer thread to cooperate with a nut for fastening the upper seat plate; The pressing block is provided with at least one pin hole for inserting the anti-rotation pin, and the anchor rod is correspondingly provided with at least one groove to accommodate the head of the anti-rotation pin; The pressure balls are in the shape of a sphere or a curved body of revolution, each of which has a center hole, and an annular elastic ring passes through the center hole of each of the pressure balls to connect the multiple pressure balls into one. When each of the pressure balls moves radially, the elastic ring can be used to expand and contract and restore the pressure balls to their relative positions when they are extended outward and to quickly and stably reset them when they are retracted inward.

2. The height-adjustable earthquake-resistant spherical steel support for rail transit as claimed in claim 1, characterized in that: A pair or more pairs of parallel planes are arranged at the lower part of the anchor rod to facilitate the twisting of the anchor rod.

3. The height-adjustable earthquake-resistant spherical steel support for rail transit as claimed in claim 1, characterized in that: The adjusting bolt is a hexagon socket head bolt.

4. The height-adjustable earthquake-resistant spherical steel support for rail transit as claimed in claim 1, characterized in that: The lower outer edge of the anchor rod is also provided with a protective sleeve, and the protective sleeve is provided with an internal thread matching the external thread of the anchor rod.

5. The height-adjustable earthquake-resistant spherical steel support for rail transit as claimed in claim 1, characterized in that: The upper surface of the anchor rod of the height adjustment device is provided with four conical grooves arranged at 90 degrees, and the lower surface of the pressure block installed on the anchor rod is also provided with four corresponding conical grooves. Four pressure balls are installed in the four pairs of conical grooves, and each pressure ball is connected as a whole through an annular elastic ring passing through the center hole.

6. The height-adjustable earthquake-resistant spherical steel support for rail transit as claimed in claim 1, characterized in that: The protective device is combined with the upper seat plate and fixed by bolt connection or welding.

7. The height-adjustable earthquake-resistant spherical steel support for rail transit as claimed in claim 1, characterized in that: The anchoring assembly consists of a foundation bolt, a sleeve and an anchoring screw.

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