Reinforced H-shaped steel column double-cantilever base

Abstract

The utility model discloses a reinforced H-shaped steel column double-cantilever base which comprises a bottom plate connected to a wing plate of an H-shaped steel column, the end face of the other side of the bottom plate is connected with two vertical installation lug plates, a flat double-lug is arranged between the two installation lug plates, the flat double-lug is provided with a pin shaft hole, and the pin shaft hole is provided with a pin shaft. The inner holes of the two mounting lug plates are connected with the pin shaft holes of the flat double lugs through pin shafts in a penetrating manner; the other end of the flat double-lug is used for being connected with a cantilever. According to the utility model, the stress concentration phenomenon at the connecting part of the flat double-lug and the pin shaft is effectively reduced, the impact force is prevented from directly acting on the inner hole of the mounting lug plate, and the stability of the whole structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of high-speed railway catenary technology, specifically to a reinforced H-shaped steel column double-arm base. Background Technology

[0002] In high-speed railway catenary systems, the cantilever arm is a key component supporting the contact wire and catenary cable. The cantilever arm base, as a crucial force-transmitting component connecting the support column and the cantilever arm, directly affects the safety and reliability of the catenary system. Traditional cantilever arm bases often employ a hinged dynamic adjustment structure. This is achieved by installing ear plates on the base body in conjunction with rotating flat double ears to form a rotating pair, using a pin connection to achieve adaptive adjustment of the load direction. However, existing designs still exhibit the following structural defects under long-term dynamic loads:

[0003] First, the hinge joint between the rotating flat double lugs and the pin is affected by alternating loads, which easily leads to local stress concentration at the edge of the pin hole, causing cracks to propagate in the hole wall. Especially under high-frequency micro-amplitude rotation conditions, the metal material is prone to brittle fracture due to fatigue accumulation, threatening the overall structural stability.

[0004] Second, although the clearance fit between the pivot pin and the inner hole of the mounting ear plate can ensure rotational flexibility, long-term fretting friction will lead to increased wear on the contact surface, which in turn expands the fit clearance and creates an amplification effect of impact load. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a reinforced H-shaped steel column double-arm base, which effectively reduces stress concentration at the connection between the flat double ears and the pin shaft, and also avoids the impact force acting directly on the inner hole of the mounting ear plate, thereby improving the overall structural stability.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A reinforced H-shaped steel column double cantilever base includes a base plate connected to the wing plate of the H-shaped steel column. Two vertical mounting lugs are connected to the other end face of the base plate, and the inner holes of the two mounting lugs are connected by a pin. A flat double lug is provided between the two mounting lugs and is rotatably connected to the pin. The flat double lug is used to connect the cantilever arm. A support block is connected to the base plate, and one side of the support block abuts against the arc-shaped end of the flat double lug.

[0008] Furthermore, the support block has side plates on both sides, and the side plates, the bottom plate, and the H-shaped steel column flange are connected by bolts.

[0009] Furthermore, the support block is provided with a V-shaped groove, and the support block abuts against the arc-shaped bottom surface of the flat double ears through the V-shaped groove.

[0010] Furthermore, the flat double ears have several arc-shaped grooves on their arc-shaped bottom surface, and several ribs on their V-shaped grooves. The ribs are inserted into and engaged with the arc-shaped grooves in a one-to-one correspondence, and slide relative to each other.

[0011] Furthermore, the support block has a trapezoidal structure, with the end face area facing the base plate being smaller than the end face area of ​​the opposite side; wedges are respectively provided on both sides of the support block near the mounting ear plate, and the inclined surface of the wedges contacts the inclined surface of the support block; each mounting ear plate is welded and fixed with a nut, and each nut is threadedly connected to an adjusting screw, which passes through the corresponding mounting ear plate and abuts against the corresponding wedge.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. By setting support blocks to provide additional support for the arc-shaped ends of the flat double ears, the stress concentration phenomenon at the connection between the flat double ears and the pin shaft is effectively reduced, the risk of brittle fracture of metal materials due to fatigue accumulation is reduced, the overall structural stability is improved, and the structural instability problem caused by stress concentration in the existing technology is solved.

[0014] 2. Even if a gap is generated between the pin and the inner hole of the mounting ear plate due to long-term friction, the support block can still bear and disperse the impact force of the pin on the inner hole of the mounting ear plate, avoiding the impact force from acting directly on the inner hole of the mounting ear plate, mitigating the impact load amplification effect, and solving the structural damage problem caused by the expansion of the gap in the prior art. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the H-shaped steel column double cantilever base in one embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the structure of the H-shaped steel column double cantilever base in one embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the structure of the H-shaped steel column double cantilever base in one embodiment of this application;

[0019] In the diagram: 100, H-beam steel column wing plate; 1, base plate; 2, mounting ear plate; 3, pin; 4, flat double ears; 5, support block; 6, side plate; 7, arc groove; 8, wedge block; 9, nut; 10, adjusting screw. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In high-speed railway catenary systems, the cantilever arm is a key component supporting the contact wire and catenary cable. The cantilever arm base, as a crucial force-transmitting component connecting the support column and the cantilever arm, directly affects the safety and reliability of the catenary system. Traditional cantilever arm bases often employ a hinged dynamic adjustment structure. This is achieved by installing ear plates on the base body in conjunction with rotating flat double ears to form a rotating pair, using a pin connection to achieve adaptive adjustment of the load direction. However, existing designs still exhibit the following structural defects under long-term dynamic loads:

[0025] First, the hinge joint between the rotating flat double lugs and the pin is affected by alternating loads, and local stress concentration is prone to occur at the edge of the pin hole, leading to the propagation of cracks in the hole wall. Especially under high-frequency micro-amplitude rotation conditions, the metal material is prone to brittle fracture due to fatigue accumulation, threatening the overall structural stability.

[0026] Second, although the clearance fit between the pivot pin and the inner hole of the mounting ear plate can ensure rotational flexibility, long-term fretting friction will lead to increased wear on the contact surface, which in turn expands the fit clearance and creates an amplification effect of impact load.

[0027] Regarding the above technical solutions, such as Figure 1 and Figure 2 As shown, this application embodiment provides a reinforced H-shaped steel column double cantilever base, including a base plate 1 connected to the H-shaped steel column wing plate 100. Two vertical mounting lugs 2 are connected to the other end face of the base plate 1. Each mounting lug 2 has an inner hole. A flat double lug 4 is provided between the two mounting lugs 2. The flat double lug 4 has a pin hole. The inner holes of the two mounting lugs 2 and the pin holes of the flat double lug 4 are connected through a pin 3. The other end of the flat double lug 4 is used to connect the cantilever arm. A support block 5 is connected to the base plate 1. One side of the support block 5 abuts against the arc-shaped end of the flat double lug 4.

[0028] During normal operation of the overhead contact system, the load borne by the cantilever arm is transmitted to the pin 3 through the flat double lug 4, and then the pin 3 distributes the load to the two mounting lugs 2, and finally to the base plate 1 and the H-shaped steel column flange 100. The support block 5 provides additional support to the arc-shaped end of the flat double lug 4. When the flat double lug 4 is subjected to load, the support block 5 contacts the arc-shaped end of the flat double lug 4, bears part of the load, and changes the stress state of the flat double lug 4.

[0029] In existing conventional wrist arm bases, the hinge joint between the rotating flat double lugs and the pin shaft is susceptible to alternating loads, leading to localized stress concentration at the edge of the pin shaft hole. This causes crack propagation in the hole wall, and brittle fracture is particularly likely under high-frequency, low-amplitude rotation conditions. This embodiment addresses this by adding a support block 5 to provide additional support to the arc-shaped ends of the flat double lugs 4. This effectively reduces stress concentration at the connection between the flat double lugs 4 and the pin shaft 3, lowers the risk of brittle fracture due to fatigue accumulation in the metal material, improves the overall structural stability, and solves the structural instability problem caused by stress concentration in existing technologies.

[0030] While the existing clearance fit between the pivot pin 3 and the inner hole of the mounting ear plate ensures rotational flexibility, long-term fretting friction leads to increased wear on the contact surface, widening the clearance and amplifying the impact load. In this embodiment, even if a clearance develops between the pivot pin 3 and the inner hole of the mounting ear plate 2 due to long-term friction, the support block 5 can still bear and disperse the impact force of the pivot pin 3 on the inner hole of the mounting ear plate 2, preventing the impact force from acting directly on the inner hole of the mounting ear plate 2, mitigating the impact load amplification effect, and solving the structural damage problem caused by the widening of the clearance in the prior art.

[0031] In some embodiments, the support block 5 is provided with side plates 6 on both sides, and the side plates 6, the bottom plate 1 and the H-shaped steel column wing plate 100 are connected by bolts.

[0032] Bolts penetrate the side plate 6, the base plate 1, and the H-beam column flange 100 to form a tight connection. During operation of the overhead contact system, the load borne by the cantilever arm is transferred to the base plate 1 via the flat double lugs 4 and the support block 5, and then from the base plate 1 to the H-beam column flange 100. The base plate 1 itself is fixed to the H-beam column flange 100 by welding or bolts, and the side plate 6 further enhances the connection strength between the base plate 1 and the H-beam column flange 100, improving the overall load-bearing capacity of the structure.

[0033] In some embodiments, the support block 5 is provided with a V-groove, and the support block 5 abuts against the arc-shaped bottom surface of the flat double ears 4 through the V-groove.

[0034] By setting a V-groove to contact the arc-shaped bottom surface of the flat double ear 4, the flat double ear 4 can rotate slightly along the V-groove. On the one hand, the increased contact area makes the support block 5 provide more even and stable support for the flat double ear 4, effectively dispersing the load borne by the flat double ear 4 and reducing the stress concentration at the connection between the flat double ear 4 and the pin 3. On the other hand, the support on both sides of the arc-shaped bottom surface of the flat double ear 4 further enhances the stability of the flat double ear 4 during rotation, reducing the swaying and offset of the flat double ear 4.

[0035] In some embodiments, the curved bottom surface of the flat double ears 4 is provided with a plurality of curved grooves 7, and the V-shaped groove is provided with a plurality of ribs. The ribs are inserted into the curved grooves one by one and slide relative to each other.

[0036] When the flat double ears 4 rotate under stress, the stiffeners slide relative to each other within the arc-shaped grooves. The interlocking fit between the stiffeners and the arc-shaped grooves restricts the displacement of the flat double ears 4 in the direction perpendicular to the sliding direction, preventing the flat double ears 4 from moving up and down during rotation. At the same time, the contact and relative sliding between the stiffeners and the arc-shaped grooves can also disperse stress to a certain extent, preventing stress concentration from causing structural damage.

[0037] like Figure 3As shown, in some embodiments, the support block 5 is a trapezoidal structure, and the end face area facing the base plate 1 is smaller than the end face area of ​​the opposite side; wedges 8 are respectively provided on both sides of the support block 5 near the mounting ear plate 2, and the inclined surface of the wedge 8 contacts the inclined surface of the support block 5; each mounting ear plate 2 is welded and fixed with a nut 9, and each nut 9 is connected to an adjusting screw 10 by a thread, the adjusting screw 10 passes through the corresponding mounting ear plate 2 and abuts against the corresponding wedge 8.

[0038] When a large gap develops between the pin 3 and the inner hole of the mounting ear plate 2 due to long-term friction and wear, the adjusting screw 10 is screwed in. The adjusting screw 10 pushes the wedge 8 to move along the inclined surface of the support block 5. Due to the contact relationship between the wedge 8 and the inclined surface of the support block 5, the movement of the wedge 8 will cause the support block 5 to move closer to the flat double ear 4. During the movement of the support block 5, the flat double ear 4 is pushed, thereby readjusting the gap between the pin 3 and the inner hole of the mounting ear plate 2. This ensures that the rotation state between the pin 3 and the inner hole of the mounting ear plate 2 is within a suitable range, avoiding excessive impact force from the pin 3 on the inner hole of the mounting ear plate 2 due to excessive gap.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reinforced H-shaped steel column double cantilever base, comprising a base plate (1) connected to an H-shaped steel column wing plate (100), wherein two vertical mounting lugs (2) are connected to the other end face of the base plate (1), each mounting lug (2) having an inner hole, and a flat double lug (4) being provided between the two mounting lugs (2), wherein the flat double lug (4) has a pin hole, and the inner holes of the two mounting lugs (2) and the pin holes of the flat double lug (4) are connected through a pin (3); the other end of the flat double lug (4) is used to connect a cantilever arm; Its features are, The base plate (1) is connected to a support block (5), and one side of the support block (5) abuts against the arc-shaped end of the flat double ear (4).

2. The reinforced H-shaped steel column double-arm base according to claim 1, characterized in that, The support block (5) has side plates (6) on both sides, and the side plates (6), the bottom plate (1), and the H-shaped steel column wing plate (100) are connected by bolts.

3. The reinforced H-shaped steel column double-arm base according to claim 1, characterized in that, The support block (5) is provided with a V-shaped groove, and the support block (5) abuts against the arc-shaped bottom surface of the flat double ears (4) through the V-shaped groove.

4. A reinforced H-shaped steel column double-arm base according to claim 3, characterized in that, The flat double ears (4) have several arc-shaped grooves (7) on their arc-shaped bottom surface, and several ribs on their V-shaped grooves. The ribs are inserted into the arc-shaped grooves one by one and slide relative to each other.

5. A reinforced H-shaped steel column double-arm base according to claim 1, characterized in that, The support block (5) has a trapezoidal structure, and the end face area facing the base plate (1) is smaller than the end face area of ​​the opposite side. The support block (5) has wedges (8) on both sides near the mounting ear plate (2), and the inclined surface of the wedges (8) contacts the inclined surface of the support block (5). Each mounting ear plate (2) is welded and fixed with a nut (9), and each nut (9) is connected to an adjusting screw (10) by a thread. The adjusting screw (10) passes through the corresponding mounting ear plate (2) and abuts against the corresponding wedge (8).

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