A u-shaped steel connecting device with collapse energy absorption function

Abstract

The present application relates to coal mine safety supporting technical field, provide a kind of U-shaped steel connecting device with collapse energy-absorbing function, comprising: a pair of U-shaped steel mutually lap and partially overlap;Clamping connection mechanism is arranged at the overlapping portion of a pair of U-shaped steel, clamping connection mechanism includes a pair of clamping plates and energy-absorbing connecting piece, a pair of clamping plates are respectively arranged at the top and bottom of the overlapping portion of a pair of U-shaped steel, and respectively with the free end of a pair of U-shaped steel located in the overlapping portion is connected, a pair of clamping plates can respectively generate reverse force to each corresponding U-shaped steel when a pair of U-shaped steel do staggered motion along the first direction;Energy-absorbing connecting piece is arranged on the two sides of a pair of U-shaped steel, and is connected between a pair of clamping plates, and a plurality of collapse holes are provided on energy-absorbing connecting piece along the first direction, at least one collapse hole can be deformed to absorb impact energy when a pair of U-shaped steel do staggered motion along the first direction;Ensure the reliability of U-shaped steel shrinkage deformation and the effectiveness of supporting.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine safety support, and in particular to a U-shaped steel connection device with collapse energy absorption function. Background Art

[0002] In recent years, with the gradual depletion of shallow coal resources, coal mining has gradually extended to deeper levels. The surrounding rock of the tunnel has been affected by the "three highs and one disturbance". Deep mining is very likely to cause dynamic disasters such as impact ground pressure, resulting in coal wall spalling, roof sinking, floor heaving, tunnel closure and even casualties.

[0003] Traditional support forms often cannot meet the current needs of safe production in coal mines. For example, a U-shaped steel metal support is composed of multiple overlapping arc beams, and the overlapping sections are fixedly connected by cable clamps. When the surrounding rock deforms, the overlapping arc beams slide relative to each other by resisting friction, thereby achieving dislocation and giving way, thereby ensuring the safety of tunnel support.

[0004] However, in the actual tunnel support process, it is difficult to maintain the friction force of the arc beam in the overlap area. The magnitude of the friction force is proportional to the normal stress borne by the overlap area, and the normal stress is determined by the preload of the cable clamp. At the same time, the friction force is also affected by the friction coefficient of the contact surface. The inner and outer surfaces of the arc beam of the conventional U-shaped steel support are smooth, and the friction coefficient is theoretically constant. However, the harsh underground environment causes the surface to rust easily, thereby increasing the friction coefficient. When the impact ground pressure exceeds the support's limit load and the arc beam does not produce relative displacement, the U-shaped steel support may twist and deform, eventually leading to support failure, seriously affecting coal mine safety production. In addition, when the U-shaped steel support shrinks, especially when shrinking under the action of impact load, the support joints usually slip instantaneously, sparks are generated, and the preload force of the clamp is reduced after sliding, which also seriously affects the stability of the U-shaped steel support's bearing capacity. Summary of the Invention

[0005] The present invention provides a U-shaped steel connection device with collapse energy absorption function, which is used to solve the problem of poor stability of the bearing capacity of the U-shaped steel bracket in the prior art.

[0006] The present invention provides a U-shaped steel connection device with collapse energy absorption function, comprising:

[0007] a pair of U-shaped steels, the pair of U-shaped steels being overlapped with each other and partially overlapping;

[0008] a clamping connection mechanism, disposed at the overlapping portion of the pair of U-shaped steels, the clamping connection mechanism comprising a pair of clamping plates and an energy-absorbing connection member, the pair of clamping plates being respectively disposed at the top and bottom of the overlapping portion of the pair of U-shaped steels and respectively connected to the free ends of the pair of U-shaped steels located at the overlapping portion, the pair of clamping plates being capable of generating a reverse force on the respective corresponding U-shaped steels when the pair of U-shaped steels make an interlaced motion along a first direction;

[0009] The energy-absorbing connecting piece is arranged on both sides of a pair of U-shaped steels and connected between a pair of clamping plates. A plurality of collapse holes are arranged on the energy-absorbing connecting piece along a first direction. At least one of the collapse holes can be deformed to absorb impact energy when the pair of U-shaped steels make an interlaced movement along the first direction.

[0010] According to the U-shaped steel connection device with collapse energy absorption function provided by the present invention, a pair of U-shaped steels includes a first U-shaped steel and a second U-shaped steel, and the first U-shaped steel is overlapped in the cavity of the second U-shaped steel.

[0011] According to the U-shaped steel connection device with collapse energy absorption function provided by the present invention, a pair of clamping plates includes a first clamping plate and a second clamping plate, the first clamping plate contacts the open end of the first U-shaped steel, and the second clamping plate contacts the bottom of the second U-shaped steel.

[0012] According to the U-shaped steel connection device with collapse energy absorption function provided by the present invention, a first baffle is provided at one end of the first clamping plate, and the first baffle abuts against the end of the first U-shaped steel located in the overlapping part; a second baffle is provided at the end of the second clamping plate facing away from the first baffle, and the second baffle abuts against the end of the second U-shaped steel located in the overlapping part.

[0013] According to the U-shaped steel connection device with collapse energy absorption function provided by the present invention, the second clamping plate is provided with a groove, and the groove is adapted to the bottom of the second U-shaped steel.

[0014] The U-shaped steel connection device with collapse energy absorption function provided by the present invention also includes connecting bolts, which are distributed on both sides of the second U-shaped steel. The connecting bolts pass through the first clamping plate, the energy absorbing connector and the second clamping plate in sequence, clamping the overlapping part of the first U-shaped steel and the second U-shaped steel between the first clamping plate and the second clamping plate.

[0015] According to the U-shaped steel connecting device with collapse energy absorption function provided by the application, the two sides of the first clamping plate are provided with first sliding connection holes, the two sides of the second clamping plate are provided with second sliding connection holes, the energy absorption connecting piece is provided with a through hole for the connecting bolt to pass through, the connecting bolt passes through the first sliding connection hole, the through hole and the second sliding connection hole in sequence, and the connecting bolt can move in the first sliding connection hole and the second sliding connection hole in the first direction.

[0016] According to the U-shaped steel connecting device with collapse energy absorption function provided by the application, the first sliding connection hole is a strip-shaped hole, and the length direction of the first sliding connection hole is the same as the first direction; the second sliding connection hole is a strip-shaped hole, and the length direction of the second sliding connection hole is the same as the first direction.

[0017] According to the U-shaped steel connecting device with collapse energy absorption function provided by the application, the energy absorption connecting piece is in a U-shaped structure and comprises a first connecting section, an intermediate connecting section and a second connecting section, a plurality of collapse holes are arranged on the first connecting section, the intermediate connecting section and the second connecting section in the first direction, the through hole is arranged at the two ends of the first connecting section and the second connecting section, the first connecting section is in contact with the inner side of the first clamping plate, the second connecting section is in contact with the inner side of the second clamping plate, and the two ends of the intermediate connecting section are connected with the first connecting section and the second connecting section perpendicularly.

[0018] According to the U-shaped steel connecting device with collapse energy absorption function provided by the application, the energy absorption connecting piece is in a rectangular tubular shape and comprises a pair of first side plates and a pair of second side plates, a plurality of grooves or collapse holes are arranged on the four side plates in the first direction, the pair of first side plates are in contact with the inner sides of the first clamping plate and the second clamping plate respectively, and the through hole is arranged at the two ends of the first side plate.

[0019] The present invention provides a U-shaped steel connection device with collapse energy absorption function. By overlapping and partially overlapping a pair of U-shaped steels and cooperating with the design of a clamping connection mechanism, the entire device can maintain high structural stability when subjected to external impact or vibration. The pair of clamping plates not only strengthens the connection between the overlapping portions of the pair of U-shaped steels, but also effectively prevents the pair of U-shaped steels from relative displacement along their length, thereby improving the shear resistance and rigidity of the overall structure. Energy-absorbing connectors are provided on both sides of the pair of U-shaped steels and connected between the pair of clamping plates. When the device is subjected to external impact, the pair of U-shaped steels perform staggered movement in a first direction. At this time, the collapse holes on the energy-absorbing connectors will deform or even close. In this process, the impact energy is absorbed through the plastic deformation of the metal material. Because the device can respond quickly when subjected to impact and absorb a large amount of energy through the deformation of the collapse holes, it can avoid unbalanced loading, ensure the accurate yielding of the U-shaped steel nodes, and simultaneously ensure the reliability of the shrinkage deformation of the U-shaped steels and the effectiveness of the support, so that the tunnel surrounding rock reaches a new balanced and stable state, thereby effectively ensuring safe production in the coal mine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the overall structure of a U-shaped steel connection device with collapse energy absorption provided by an embodiment of the present invention;

[0022] Figure 2 A side view of a U-shaped steel connection device with collapse energy absorption provided by an embodiment of the present invention;

[0023] Figure 3 A schematic structural diagram of a second splint provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the overall structure of the energy-absorbing connector provided by an embodiment of the present invention;

[0025] Figure 5 The second schematic diagram of the overall structure of the energy-absorbing connector provided by an embodiment of the present invention;

[0026] Figure 6 This is the third schematic diagram of the overall structure of the energy-absorbing connector provided in an embodiment of the present invention.

[0027] Figure 7Figure 4 is a schematic diagram of the overall structure of the energy-absorbing connecting piece according to another embodiment of the present application.

[0028] Figure 8 Figure 1 is a schematic diagram of the overall structure of the energy-absorbing connecting piece according to another embodiment of the present application.

[0029] Figure 9 Figure 2 is a schematic diagram of the overall structure of the energy-absorbing connecting piece according to another embodiment of the present application.

[0030] Reference signs:

[0031] 1, energy-absorbing connecting piece; 11, first connecting section; 12, intermediate connecting section; 13, second connecting section; 14, through hole; 15, first side plate; 16, second side plate;

[0032] 2, collapsing hole;

[0033] 3, first U-shaped steel; 4, second U-shaped steel; 5, first clamping plate; 51, first baffle; 52, first sliding connection hole;

[0034] 6, second clamping plate; 61, second baffle; 62, second sliding connection hole; 7, connecting bolt. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] The present application will be described below in combination with Figures 1-9 A U-shaped steel connecting device with collapsing energy-absorbing function is described.

[0037] The present application provides a U-shaped steel connecting device with collapsing energy-absorbing function, comprising:

[0038] a pair of U-shaped steels and a clamping connecting mechanism.

[0039] Specifically, a pair of U-shaped steels overlap each other and partially overlap, and a clamping connection mechanism is arranged at the overlapping part of a pair of U-shaped steels. The clamping connection mechanism includes a pair of clamping plates and an energy-absorbing connection member 1. The pair of clamping plates are respectively arranged at the top and bottom of the overlapping part of the pair of U-shaped steels, and are respectively connected to the free ends of the pair of U-shaped steels located at the overlapping part. The pair of clamping plates can generate a reverse force on their respective corresponding U-shaped steels when the pair of U-shaped steels make an interlaced movement along the first direction, wherein the first direction is the length direction of the U-shaped steel; that is, the pair of clamping plates can achieve the clamping of the pair of U-shaped steels while preventing the pair of U-shaped steels from relative displacement along their length direction.

[0040] The energy-absorbing connector 1 is arranged on both sides of a pair of U-shaped steels and connected between a pair of clamping plates. A plurality of collapse holes 2 are arranged on the energy-absorbing connector 1 along a first direction. At least one collapse hole 2 can deform to absorb impact energy when the pair of U-shaped steels make an interlaced movement along the first direction.

[0041] As can be seen from the above scheme, the present invention uses traditional U-shaped steel, overlaps a pair of U-shaped steels with each other and partially overlaps, and cooperates with the design of a clamping connection mechanism, so that the entire device can maintain a high structural stability when subjected to external impact or vibration. The pair of clamping plates not only strengthens the connection between the overlapping portions of the pair of U-shaped steels, but also effectively prevents the pair of U-shaped steels from relative displacement along their length, thereby improving the shear resistance and rigidity of the overall structure. By providing energy-absorbing connectors 1 on both sides of the pair of U-shaped steels and connecting them between the pair of clamping plates, when the device is subjected to external impact, the pair of U-shaped steels perform staggered movement in a first direction. At this time, the collapse holes 2 on the energy-absorbing connectors 1 will deform or even close. In this process, the impact energy is absorbed by the plastic deformation of the metal material. Since the device can respond quickly when subjected to impact and absorb a large amount of energy through the deformation of the collapse holes 2, it can avoid the occurrence of unbalanced loading, ensure the accurate yielding of the U-shaped steel nodes, and at the same time ensure the reliability of the shrinkage deformation of the U-shaped steel and the effectiveness of the support, so that the tunnel surrounding rock reaches a new equilibrium and stable state, thereby effectively ensuring the safe production of the coal mine.

[0042] like Figure 1-Figure 2 As shown, a pair of U-shaped steels in this embodiment includes a first U-shaped steel 3 and a second U-shaped steel 4, the first U-shaped steel 3 is overlapped in the cavity of the second U-shaped steel 4, and the two adjacent U-shaped steels are overlapped with each other to form a combined bracket; a pair of clamping plates includes a first clamping plate 5 and a second clamping plate 6, the first clamping plate 5 is in contact with the open end of the first U-shaped steel 3, and the second clamping plate 6 is in contact with the bottom of the second U-shaped steel 4, that is, the overlapping parts of the first U-shaped steel 3 and the second U-shaped steel 4 are clamped and fixed in the space between the first clamping plate 5 and the second clamping plate 6.

[0043] Preferably, the first splint 5 and the second splint 6 provided in this embodiment are both made of high-strength steel. Compared with the traditional cable clamp structure, they have the characteristics of high rigidity and large protected surface area. They can effectively improve the bearing capacity of the U-shaped steel node in the radial direction along the tunnel section, and solve the problem that the traditional U-shaped steel cable clamp structure is prone to in-plane instability.

[0044] Furthermore, the second clamping plate 6 is provided with a groove, which is adapted to the bottom of the second U-shaped steel 4 , so that the second clamping plate 6 can better clamp the second U-shaped steel 4 from the outside.

[0045] In some embodiments, a first baffle 51 is provided at one end of the first clamping plate 5, and the first baffle 51 abuts against the end of the first U-shaped steel 3 located at the overlapping portion, and a second baffle 61 is provided at one end of the second clamping plate 6 away from the first baffle 51, and the second baffle 61 abuts against the end of the second U-shaped steel 4 located at the overlapping portion; Figure 2 As shown, the first baffle 51 can be a rectangular plate, which is arranged at one end of the first clamping plate 5, and is used to abut against the end of the first U-shaped steel 3; the second baffle 61 can be an arc-shaped plate, which is arranged at the end of the second clamping plate 6, and can be arranged at the end of the groove part, and is used to abut against the end of the second U-shaped steel 4; thereby, during the contraction and sliding process of the U-shaped steel, the first U-shaped steel 3 pushes the first baffle 51, thereby driving the first clamping plate 5 to slide together, and the second U-shaped steel 4 pushes the second baffle 61, thereby driving the second clamping plate 6 to slide together.

[0046] With such an arrangement, through the design of the first baffle 51 and the second baffle 61, the movement of the U-shaped steel along its length direction can be further restricted, the ability to resist impact can be improved, and the overlapping parts of a pair of U-shaped steels can be fixed more firmly, ensuring that they will not easily slide or dislocate when subjected to external forces, thereby improving the overall stability of the device and enhancing the reliability of the connection points.

[0047] In addition, the positions of the two baffles can be adjusted to adapt to U-shaped steels of different specifications to ensure a good connection effect. If the relative positions between the U-shaped steels need to be adjusted, this can also be achieved by changing the positions of the two baffles along the first direction.

[0048] In this embodiment, connecting bolts 7 are also included. High-strength bolts are used. The connecting bolts 7 are distributed on both sides of the second U-shaped steel 4. The connecting bolts 7 pass through the first clamping plate 5, the energy-absorbing connector 1 and the second clamping plate 6 in sequence, clamping the overlapping part of the first U-shaped steel 3 and the second U-shaped steel 4 between the first clamping plate 5 and the second clamping plate 6.

[0049] In this way, the energy-absorbing connector 1 is fixed to a pair of clamping plates by connecting bolts 7 passing through both sides of the second U-shaped steel 4. During the contraction and sliding of the U-shaped steel, the energy-absorbing connector 1 is squeezed by the connecting bolts 7 on both sides, and its collapse hole 2 is gradually squeezed closed. In this process, energy is absorbed through the plastic deformation of the metal material.

[0050] Specifically, first sliding connection holes 52 are provided on both sides of the first splint 5, and a pair can be provided on each side, so that first sliding connection holes 52 are provided at the four corners of the first splint 5; second sliding connection holes 62 are provided on both sides of the second splint 6. Similarly, second sliding connection holes 62 are provided at the four corners of the second splint 6. The energy-absorbing connector 1 is provided with a through hole 14 for the connecting bolt 7 to pass through. The through hole 14 is adapted to the connecting bolt 7. The connecting bolt 7 passes through the first sliding connection hole 52, the through hole 14 and the second sliding connection hole 62 in sequence, and the connecting bolt 7 can move in the first sliding connection hole 52 and the second sliding connection hole 62 along the first direction.

[0051] This arrangement, along with the design of the sliding connection holes, allows the connecting bolts 7 to move within a certain range along the length of the U-shaped steel. This allows the U-shaped steel to undergo relative displacement to a certain extent when the device is subjected to an external impact, reducing stress concentration at the connection and distributing the impact force more evenly across the connection, thereby better absorbing and dispersing the impact energy and extending the device's service life. Furthermore, the movement of the connecting bolts 7 allows the collapse holes 2 in the energy-absorbing connector 1 to deform more fully during the impact, thereby more effectively absorbing the impact energy and improving energy absorption efficiency.

[0052] In addition, the device can better adapt to the use requirements under different working conditions. For example, under temperature changes or long-term vibration environments, the U-shaped steel may undergo slight dimensional changes, and the sliding connection hole can allow these changes without affecting the reliability of the connection.

[0053] In some embodiments, the first sliding connection hole 52 is a bar-shaped hole, and the length direction of the first sliding connection hole 52 is the same as the first direction; the second sliding connection hole 62 is a bar-shaped hole, and the length direction of the second sliding connection hole 62 is the same as the first direction.

[0054] Reference Figure 4In this embodiment, the energy-absorbing connector 1 has a U-shaped structure, including a first connecting section 11, an intermediate connecting section 12 and a second connecting section 13. The first connecting section 11, the intermediate connecting section 12 and the second connecting section 13 are all provided with a plurality of collapse holes 2 along the first direction, and through holes 14 are provided at both ends of the first connecting section 11 and the second connecting section 13. The first connecting section 11 contacts the inner side of the first splint 5, and the second connecting section 13 contacts the inner side of the second splint 6. The two ends of the intermediate connecting section 12 are respectively vertically connected to the first connecting section 11 and the second connecting section 13.

[0055] In this arrangement, the first connecting section 11 contacts the inner side of the first clamping plate 5, and the second connecting section 13 contacts the inner side of the second clamping plate 6. This multi-point contact design increases the stability of the connection between the energy-absorbing connector 1 and a pair of clamping plates, preventing the U-shaped steel from sliding or dislocating when subjected to external force; and this multi-segment design can not only enhance the structural stability and reliability of the energy-absorbing connector 1, but also enable multiple areas to deform simultaneously when impacted, so that the impact force can be more evenly distributed on each connecting section, avoiding the situation of excessive local force, thereby more efficiently absorbing and dispersing impact energy, and improving the overall impact resistance.

[0056] Alternatively, as Figure 4-Figure 7 As shown, the collapse holes 2 on the first connecting segment 11 and the second connecting segment 13 can be circular holes, rectangular holes, hexagonal holes, etc.; the collapse holes 2 on the middle connecting segment 12 can be strip holes. In addition, shapes such as elliptical, diamond, and crescent are also included but not limited to. The size of the collapse holes 2 is determined according to the actual required sliding stroke.

[0057] Reference Figure 8-Figure 9 In other embodiments, the energy-absorbing connector 1 is in the shape of a rectangular tube and includes a pair of first side plates 15 and a pair of second side plates 16. A plurality of collapse holes 2 are provided on the four side plates along the first direction. Of course, they can also be provided as a plurality of grooves, preferably arc-shaped grooves; the pair of first side plates 15 are in contact with the inner sides of the first clamping plate 5 and the second clamping plate 6 respectively, and through holes 14 are provided at both ends of the first side plates 15.

[0058] With this arrangement, compared to the U-shaped structure, the rectangular tube can further improve the stability of the connection between the energy-absorbing connector 1 and a pair of clamping plates while achieving the effect of absorbing and dispersing impact energy, thereby enhancing the structural stability and reliability of the energy-absorbing connector 1.

[0059] The working process of a U-shaped steel connection device with collapse energy absorption function provided by this embodiment is as follows: first, the first U-shaped steel 3 is overlapped on the first U-shaped steel 3 to ensure that the length of the overlapping part is the same as the length of a pair of clamping plates; the first clamping plate 5 is buckled on the open end of the first U-shaped steel 3, and the end of the U-shaped steel of the overlapping part contacts the first baffle 51 of the first clamping plate 5; the second clamping plate 6 is installed on the outside of the bottom end of the first U-shaped steel 3 so that the end of the U-shaped steel of the overlapping part contacts the second baffle 61 of the second clamping plate 6; the energy absorbing connectors 1 on both sides are placed in the middle of a pair of clamping plates, and the connecting bolts 7 are passed through the first sliding connection hole 52 of the first clamping plate 5, the through hole 14 on the energy absorbing connector 1 and the second sliding connection hole 62 of the second clamping plate 6 to clamp the overlapping part of the U-shaped steel between the first clamping plate 5 and the second clamping plate 6. The pre-tightening force applied by the connecting bolts 7 is calculated and determined according to the specific parameters of the actual coal mine tunnel.

[0060] When impact ground pressure occurs, and when the impact ground pressure exceeds the ultimate load that the U-shaped steel retractable support can withstand, the two sections of U-shaped steel will shift relative to each other to make way, and the sliding of a pair of U-shaped steels will push the baffles corresponding to their respective ends to drive the splints to move together. Due to the limiting effect of the sliding connection holes, the connecting bolts 7 slide in the first sliding connection holes 52 and the second sliding connection holes 62. In this process, due to the limitation of the connecting bolts 7 on both sides, the energy-absorbing connection part 1 is squeezed, thereby causing the collapse hole 2 to gradually squeeze and close. The impact energy generated by the impact ground pressure acting on the tunnel is continuously absorbed through the plastic deformation of the metal material, avoiding the occurrence of overload, ensuring the accurate making way of the U-shaped steel node, and at the same time ensuring the reliability of shrinkage deformation and the effectiveness of support, so that the tunnel surrounding rock reaches a new balanced and stable state, thereby effectively ensuring the safe production of the coal mine.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A U-shaped steel connection device with collapse energy absorption function, characterized in that: include: a pair of U-shaped steels, the pair of U-shaped steels being overlapped with each other and partially overlapping; A clamping connection mechanism is provided at the overlapping portion of a pair of U-shaped steels, the clamping connection mechanism comprising a pair of clamping plates and an energy absorbing connection member (1), the pair of clamping plates being respectively provided at the top and bottom of the overlapping portion of the pair of U-shaped steels and respectively connected to the free ends of the pair of U-shaped steels located at the overlapping portion, the pair of clamping plates being capable of generating a reverse force on the corresponding U-shaped steels when the pair of U-shaped steels make an interlaced motion along a first direction; A pair of clamping plates includes a first clamping plate (5) and a second clamping plate (6); The energy absorbing connecting member (1) is provided on both sides of a pair of U-shaped steels and connected between a pair of clamping plates. A plurality of collapse holes (2) are provided on the energy absorbing connecting member (1) along a first direction. At least one of the collapse holes (2) can be deformed to absorb impact energy when the pair of U-shaped steels make staggered movements along the first direction. The energy absorbing connecting member (1) has a U-shaped structure, comprising a first connecting section (11), an intermediate connecting section (12) and a second connecting section (13); the first connecting section (11), the intermediate connecting section (12) and the second connecting section (13) are all provided with a plurality of collapse holes (2) along a first direction, and through holes (14) are provided at both ends of the first connecting section (11) and the second connecting section (13); the first connecting section (11) is in contact with the inner side of the first splint (5), the second connecting section (13) is in contact with the inner side of the second splint (6), and the two ends of the intermediate connecting section (12) are respectively vertically connected to the first connecting section (11) and the second connecting section (13); or, The energy-absorbing connecting member (1) is in the shape of a rectangular tube and comprises a pair of first side plates (15) and a pair of second side plates (16). A plurality of collapse holes (2) are provided on each of the four side plates along a first direction. The pair of first side plates (15) are in contact with the inner sides of the first clamping plate (5) and the second clamping plate (6), respectively, and the through holes (14) are provided at both ends of the first side plates (15).

2. The U-shaped steel connection device with collapse energy absorption function according to claim 1, characterized in that: The pair of U-shaped steels comprises a first U-shaped steel (3) and a second U-shaped steel (4), wherein the first U-shaped steel (3) is overlapped in the cavity of the second U-shaped steel (4).

3. The U-shaped steel connection device with collapse energy absorption function according to claim 2, characterized in that: The first clamping plate (5) contacts the open end of the first U-shaped steel (3), and the second clamping plate (6) contacts the bottom of the second U-shaped steel (4).

4. The U-shaped steel connection device with collapse energy absorption function according to claim 3, characterized in that: A first baffle (51) is provided at one end of the first clamping plate (5), and the first baffle (51) abuts against the end of the first U-shaped steel (3) located at the overlapping portion; a second baffle (61) is provided at one end of the second clamping plate (6) away from the first baffle (51), and the second baffle (61) abuts against the end of the second U-shaped steel (4) located at the overlapping portion.

5. The U-shaped steel connection device with collapse energy absorption function according to claim 3, characterized in that: The second clamping plate (6) is provided with a groove, and the groove is adapted to the bottom of the second U-shaped steel (4).

6. The U-shaped steel connection device with collapse energy absorption function according to claim 3, characterized in that: It also includes connecting bolts (7), which are distributed on both sides of the second U-shaped steel (4). The connecting bolts (7) pass through the first clamping plate (5), the energy absorbing connector (1) and the second clamping plate (6) in sequence, and clamp the overlapping part of the first U-shaped steel (3) and the second U-shaped steel (4) between the first clamping plate (5) and the second clamping plate (6).

7. The U-shaped steel connection device with collapse energy absorption function according to claim 6, characterized in that: First sliding connection holes (52) are provided on both sides of the first clamping plate (5), second sliding connection holes (62) are provided on both sides of the second clamping plate (6), and the energy absorbing connecting member (1) is provided with a through hole (14) for the connecting bolt (7) to pass through. The connecting bolt (7) passes through the first sliding connection hole (52), the through hole (14) and the second sliding connection hole (62) in sequence, and the connecting bolt (7) can move in the first sliding connection hole (52) and the second sliding connection hole (62) along a first direction.

8. The U-shaped steel connection device with collapse energy absorption function according to claim 7, characterized in that: The first sliding connection hole (52) is a strip-shaped hole, and the length direction of the first sliding connection hole (52) is the same as the first direction; the second sliding connection hole (62) is a strip-shaped hole, and the length direction of the second sliding connection hole (62) is the same as the first direction.

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