Portable steel rail lifting frame

Abstract

The utility model discloses a portable steel rail lifting frame which comprises a supporting frame and a hydraulic pump, the hydraulic pump is arranged at the top end of the supporting frame, a piston rod of the hydraulic pump is vertically downward and fixedly connected with the top end of the supporting frame, the portable steel rail lifting frame further comprises a connecting mechanism and rail clamping mechanisms, and the rail clamping mechanisms are arranged in the supporting frame and located below the hydraulic pump. The connecting mechanism vertically penetrates through the top end of the supporting frame, and the two ends of the connecting mechanism are fixedly connected with the hydraulic pump and the rail clamping mechanism correspondingly. According to the portable steel rail lifting frame, the hydraulic pump is matched with the multiple rail clamping arms in the rail clamping mechanism, a steel rail can be lifted through the rail clamping arms, the burden of workers is relieved, and the lifting efficiency of the steel rail is improved; a roller arranged at the lower end part of each rail clamping arm can facilitate the front-back movement of the steel rail after the steel rail is lifted; the rollers at the bottom end of the lifting frame can facilitate the movement of the lifting frame at the top of the steel rail, so that the lifting frame can be conveniently transferred and carried during line patrol, and the burden of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rail maintenance technology, and in particular to a portable rail lifting frame. Background Technology

[0002] Railway rails are a core component of railway lines. Their main function is to provide a continuous and smooth rolling surface for train wheels, guide the train's direction, and withstand the enormous pressure and impact forces from the wheels. Modern rails typically employ an "I-beam" cross-section design, a structure that effectively resists bending and shear forces while ensuring stability. Rails must possess high hardness, wear resistance, fatigue resistance, and sufficient toughness. Commonly used materials are high-carbon steel or alloy steel. High-manganese steel or stainless steel is used in some special sections. After hot rolling, they are usually heat-treated to improve surface hardness and durability.

[0003] Railway rails require regular maintenance during use, including periodic grinding of the rail surface to eliminate cracks and unevenness, adjustment of track gauge and geometry, and replacement of rails with excessive wear to ensure a smooth track. When performing rail stress relief work on railway lines, rollers are placed between the bottom of the rail and the sleeper to release the rail from the sleeper's constraint, placing it in a completely free state. When small horizontal errors occur on the upper surface of the railway rails, shims of varying thicknesses are placed between the bottom of the rail and the sleeper to ensure the dimensional requirements and quality of small-scale leveling adjustments are met. All of the aforementioned operations require lifting the rails. Traditionally, one method involves using a crowbar to lift the rails. However, this method only lifts a small area at a time, requiring multiple presses of the crowbar to raise the rail to the appropriate height. This results in high labor intensity for workers, low efficiency, and a risk of the crowbar slipping and causing injury. Another method uses a hydraulic rail lifter. However, hydraulic rail lifters weigh over 30kg, making them inconvenient to carry during railway inspections, further increasing labor intensity. Furthermore, the surrounding area needs to be cleared before use, leading to longer processing times and lower efficiency. Therefore, a device that is easy to carry during railway inspections and can efficiently lift rails is needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a portable rail lifting frame.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model relates to a portable rail lifting frame, comprising a support frame and a hydraulic pump. The hydraulic pump is located at the top of the support frame, and its piston rod is vertically downward and fixedly connected to the top of the support frame. It also includes a connecting mechanism and a rail clamping mechanism. The rail clamping mechanism is located inside the support frame and below the hydraulic pump. The connecting mechanism vertically penetrates the top of the support frame, and its two ends are fixedly connected to the hydraulic pump and the rail clamping mechanism, respectively, so that the hydraulic pump can drive the rail clamping mechanism to move vertically.

[0007] As a preferred embodiment of the present invention, the support frame includes a frame body, which is horizontally arranged and has a horizontal support plate at the center of its top end, and vertical support rods at the four corners of its bottom end. The support plate is arranged along the width direction of the frame body, and the piston rod of the hydraulic pump is vertically downward and fixedly connected to the center of the support plate.

[0008] As a preferred embodiment of this utility model, the connecting mechanism includes two clamping plates and two screws. Two vertically downward-facing through holes are symmetrically opened on the support plate on both sides of the hydraulic pump. The two clamping plates are respectively positioned on both sides of the hydraulic pump and clamped by two locking bolts. The gap between the two plates is located directly above the two through holes. The two screws pass through the gap between the two clamping plates from both ends and then vertically through the corresponding through holes. The bottom end of each screw is fixedly connected to the rail clamping mechanism, and its top end is threaded with two nuts located at the top and bottom ends of the two clamping plates, respectively. The screws are connected to the clamping plates through the two nuts.

[0009] As a preferred technical solution of this utility model, the rail clamping mechanism includes a hinge shaft and two connecting plates. The top ends of the two connecting plates are respectively fixedly connected to the bottom ends of the corresponding screws. Each connecting plate has a rail clamping arm on both sides. The hinge shaft connects the bottom of each connecting plate and the top of each rail clamping arm so that the rail clamping arm can rotate about the hinge shaft as the axis.

[0010] As a preferred technical solution of this utility model, the rail clamping mechanism further includes two U-shaped pulling members, one end of each pulling member being rotatably connected to the two adjacent rail clamping arms, and the other end extending through the frame to the top.

[0011] As a preferred embodiment of this utility model, each of the clamping arms is provided with a rotatable roller at the end away from the connecting plate.

[0012] As a preferred embodiment of this utility model, a crossbar is provided in the middle of two adjacent support rods, and rollers are provided at the bottom of both rods. The two ends of the rollers are rotatably connected to the corresponding two support rods through bearings.

[0013] As a preferred technical solution of this utility model, it also includes a pressure rod adapted to the hydraulic pump, and the front side wall of the frame is provided with a rod insertion ring for placing the pressure rod.

[0014] As a preferred embodiment of this utility model, a pull ring is provided on the left side wall of the frame, and an anti-slip layer is provided at the bottom of each support rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. By using a hydraulic pump in conjunction with multiple rail clamping arms in the rail clamping mechanism, the rails can be lifted, reducing the burden on workers and improving the efficiency of rail lifting.

[0017] 2. The rollers at the lower end of each rail clamping arm facilitate the back-and-forth movement of the rail after it is raised;

[0018] 3. The rollers at the bottom of the lifting frame allow it to move easily on top of the rail, making it convenient to move the lifting frame between different locations during line inspections and reducing the burden on workers. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0021] Figure 2 This is the second schematic diagram of the overall structure of this utility model;

[0022] Figure 3 This is a side view of the present invention;

[0023] Figure 4 This is a top view of the present invention;

[0024] Figure 5 This is a bottom view of the present invention;

[0025] Figure 6 This is a schematic diagram of the usage state of this utility model;

[0026] In the diagram: 1. Hydraulic pump; 2. Support frame; 21. Frame body; 22. Support plate; 23. Support rod; 24. Through hole; 25. Crossbar; 26. Roller; 27. Insert rod ring; 28. Pull ring; 3. Connecting mechanism; 31. Clamping plate; 32. Screw; 33. Nut; 4. Rail clamping mechanism; 41. Hinge shaft; 42. Connecting plate; 43. Rail clamping arm; 44. Pulling component; 45. Roller; 5. Pressure rod. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] In the attached diagram, all identical reference numerals refer to the same components.

[0029] like Figure 1-5 As shown, this utility model provides a portable rail lifting frame, including a support frame 2 and a hydraulic pump 1. The hydraulic pump 1 is located at the top of the support frame 2, and its piston rod is vertically downward and fixedly connected to the top of the support frame 2. It also includes a connecting mechanism 3 and a rail clamping mechanism 4. The rail clamping mechanism 4 is located inside the support frame 2 and below the hydraulic pump 1. The connecting mechanism 3 vertically penetrates the top of the support frame 2, and its two ends are fixedly connected to the hydraulic pump 1 and the rail clamping mechanism 4 respectively, so that the hydraulic pump 1 drives the rail clamping mechanism 4 to move vertically.

[0030] In this embodiment, the support frame 2 is used for the overall support of the lifting frame. When in use, the bottom end of the support frame 2 is placed on the top of the sleeper (rail tie). The rail clamping mechanism 4 inside the support frame 2 clamps the bottom of the rail head. Then, the hydraulic pump 1 is used to extend the piston rod of the hydraulic pump 1. During the extension process, the piston rod drives the rail clamping mechanism 4 to move vertically upward through the connecting mechanism 3 connected to the hydraulic pump 1, thereby raising the rail through the rail clamping mechanism 4.

[0031] Furthermore, the support frame 2 includes a frame 21, which is horizontally arranged and has a horizontal support plate 22 at the center of its top. Vertical support rods 23 are provided at the four corners of its bottom. The support plate 22 is arranged along the width direction of the frame 21, and the piston rod of the hydraulic pump 1 is vertically downward and fixedly connected to the center of the support plate 22.

[0032] In this embodiment, the frame 21 and the support plate 22 at its top form a platform for installing the hydraulic pump 1. The piston rod of the hydraulic pump 1 is vertically downward and is welded to the support plate 22 or connected by bolts or other suitable connection methods. The support rod 23 is used to support the frame 21 and contacts the top surface of the sleeper, so that the lifting frame can be placed on the sleeper.

[0033] Furthermore, the connecting mechanism 3 includes two clamping plates 31 and two screws 32. The support plate 22 has two symmetrical through holes 24 located on both sides of the hydraulic pump 1 and pointing vertically downwards. The two clamping plates 31 are respectively located on both sides of the hydraulic pump 1 and clamped by two locking bolts. The gap between the two plates is located directly above the two through holes 24. The two screws 32 pass through the gap between the two clamping plates 31 from both ends and then pass vertically through the corresponding through holes 24. The bottom end of each screw 32 is fixedly connected to the rail clamping mechanism 4, and its top end is threaded with two nuts 33 located at the top and bottom ends of the two clamping plates 31 respectively. The screws 32 are connected to the clamping plates 31 by the two nuts 33.

[0034] In this embodiment, two clamping plates 31 are respectively disposed on both sides of the appropriate position of the cylinder of the hydraulic pump 1, and are fixed by bolts so that the two clamping plates 31 clamp and fix the lower part of the cylinder of the hydraulic pump 1 (this part is the part of the cylinder of the hydraulic pump 1 used for fixing, and the clamping operation will not cause the cylinder to deform).

[0035] Two screws 32 are respectively set in the gap created after the two clamping plates 31 are fixed, and pass through the through holes 24 symmetrically opened on the support plate 22. Each screw 32 has two nuts 33 at its top. One nut 33 is located below the two clamping plates 31, and the other nut 33 is located above the two clamping plates 31. The corresponding screws 32 are fixed in the appropriate positions of the two clamping plates 31 by the two nuts 33. A suitable washer is also provided between each nut 33 and the two clamping plates 31. The other end of the two screws 32 is fixedly connected to the rail clamping mechanism 4.

[0036] Furthermore, the rail clamping mechanism 4 includes a hinge shaft 41 and two connecting plates 42. The top ends of the two connecting plates 42 are fixedly connected to the bottom ends of the corresponding screws 32. Each connecting plate 42 has a rail clamping arm 43 on both sides. The hinge shaft 41 connects the bottom of each connecting plate 42 and the top of each rail clamping arm 43 so that the rail clamping arm 43 can rotate around the hinge shaft 41.

[0037] In this embodiment, each connecting plate 42 is provided with rail clamping arms 43 on both the front and rear sides. The hinge shaft 41 is hinged to the rail clamping arms 43 on each connecting plate 42. The hinge shaft 41, the connecting plate 42 and the two rail clamping arms 43 are combined to form a jaw structure. The lower ends of the two rail clamping arms 43 (equivalent to the lower jaws of the jaws) can clamp the bottom of the rail head.

[0038] Furthermore, the rail clamping mechanism 4 also includes two U-shaped pull members 44, one end of each pull member 44 being rotatably connected to two adjacent rail clamping arms 43, and the other end extending through the frame 21 to the top.

[0039] In this embodiment, the non-closed end of the U-shaped pull member 44 is rotatably connected to the two adjacent clamping rail arms 43, and its closed end extends upward through the frame 21 and upward. The closed end of the pull member 44 can be provided with a handle to facilitate workers to hold and use it.

[0040] Furthermore, each clamping arm 43 is provided with a rotatable roller 45 at the end away from the connecting plate 42.

[0041] In this embodiment, each rail clamping arm 43 is provided with a rotatable roller 45. The rollers 45 on two adjacent left and right rail clamping arms 43 are located between the corresponding two rail clamping arms 43, so that the rollers 45 can contact the lower part of the rail head when the two rail clamping arms 45 clamp the rail head, and the rail can move on the rollers 45.

[0042] Furthermore, a crossbar 25 is provided in the middle of the two adjacent support rods 23, and rollers 26 are provided at the bottom of both. The two ends of the rollers 26 are rotatably connected to the corresponding two support rods 23 through bearings.

[0043] In this embodiment, the crossbar 25 is used to enhance the stability of the connection of the support rod 23. The width of the two rollers 26 is adapted to the width of the top surface of the rail. When the two rollers 26 are placed on the top of the rail, the lifting frame can move on the rail, which makes it convenient to carry the lifting frame during line inspection and reduces the workload of workers during line inspection. The outer surface of the rollers 26 has a recess that is adapted to the top of the rail so that the lifting frame can move more stably on the rail.

[0044] Furthermore, it also includes a pressure rod 5 adapted to the hydraulic pump 1, and a rod insert ring 27 for placing the pressure rod 5 is provided on the front side wall of the frame 21.

[0045] In this embodiment, the pressure rod 5 is adapted to the hydraulic pump 1. It is used to connect to the hydraulic pump 1, and during the repeated pressing of the pressure rod 5 connected to the hydraulic pump 1, the piston rod of the hydraulic pump 1 extends, thereby driving the rail clamping mechanism 4 to lift the rail. When not in use, the pressure rod 5 can be inserted into the insertion ring 27. The inner diameter of the insertion ring 27 is adapted to the outer diameter of the pressure rod 5 body. Since one end of the pressure rod 5 has a handle that is larger than the outer diameter of the pressure rod 5 body, when inserting the insertion ring 27, the handle is placed above the insertion ring 27 and abuts against the top of the insertion ring 27 to prevent the pressure rod 5 from passing directly through the insertion ring 27.

[0046] Furthermore, a pull ring 28 is provided on the left side wall of the frame 21, and an anti-slip layer is provided at the bottom of each support rod 23.

[0047] In this embodiment, the pull ring 28 can be connected to the pull rod or the pull rope so that the lifting frame can be pulled by the worker when the rail is moving; the anti-slip layer at the bottom of the support rod 23 can play an anti-slip role.

[0048] Specific usage instructions:

[0049] like Figure 6 As shown, during railway line inspection, the lifting frame is placed on the rail, and the two rollers 26 contact the top of the rail and roll on the rail when the lifting frame moves, so that the lifting frame can move and transfer along the rail. When the lifting frame moves on the rail, it can also be connected to the pull ring 28 by a pull rod or pull rope, so that workers can easily drag the lifting frame on the rail to move it.

[0050] During the rail lifting operation, the worker first pulls the pulling component 44, causing the rail clamping arm 43 to open to a width greater than the rail head. The support rod 23 is then placed on the sleeper, positioned on both sides of the rail. The pulling component 44 is then released, allowing the rail clamping arm 43 to return to its original position due to gravity. After returning to its original position, the rail clamping arm 43 and the corresponding roller 45 are positioned at the bottom of the rail head. Next, the worker tightens the return oil switch and removes the pressure rod 5 from the insertion rod switch 27. The pressure rod 5 is then inserted into the corresponding area of ​​the hydraulic pump 1, and the worker repeatedly presses down on the pressure rod 5 until the piston rod of the hydraulic pump 1 extends. The piston rod of the hydraulic pump 1 then contacts the support plate. 22 contacts, causing the two clamping plates 31 connected to the cylinder of the hydraulic pump 1 to move vertically upward, thereby driving the rail clamping mechanism 4, which is fixedly connected to the two screws 32, to move vertically upward. By moving the rail clamping mechanism 4 vertically upward, the stuck rail is lifted (separated from the sleeper). Then, rubber pads are added or replaced between the sleeper and the rail. After the lifting and subsequent operations are completed, the return oil switch is opened to reset the piston rod of the hydraulic pump 1, thereby resetting the rail. The pulling part 44 is pulled up, causing the rail clamping arm 43 to open and the lifting frame to be lifted, so that the rail clamping arm 43 is separated from the rail.

[0051] When releasing stress on the rail, one of these lifting frames is set up approximately every 100m, and the rail is lifted in the manner described above. After being lifted, the rollers 45 on the rail clamping arm 43 act as rollers in the stress release chamber, facilitating the back-and-forth movement of the rail and ensuring uniform rail expansion and contraction.

[0052] In the above embodiment, the hydraulic pump 1 is a YL5T mechanical hydraulic pump; the frame 21 is made of four 20*40mm square steel pipes of appropriate length connected together, and the thickness of the square steel pipes is 2mm. The frame 21 can also be connected with one square steel pipe in the middle to increase the stability of the frame 21 and support the support plate 22; the support rod 23 is four 20*40mm square steel pipes of appropriate length connected to the four corners of the bottom of the frame 21. The connection method can be welding, and the thickness of the square steel pipes is 2mm; the support plate 22 is a steel plate with a thickness of 10mm and is fixedly connected to the middle of the top of the frame 21.

[0053] This utility model is a portable rail lifting frame. Using a hydraulic pump in conjunction with multiple rail clamping arms in the rail clamping mechanism, the rails can be lifted, reducing the burden on workers and improving the efficiency of rail lifting. Rollers at the lower end of each rail clamping arm facilitate the forward and backward movement of the rail after it has been lifted. Rollers at the bottom of the lifting frame allow it to move easily on top of the rails, making it convenient to move the lifting frame between different locations during line inspections, further reducing the burden on workers.

[0054] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A portable rail lifting frame, comprising a support frame (2) and a hydraulic pump (1), wherein the hydraulic pump (1) is disposed at the top of the support frame (2), and its piston rod is vertically downward and fixedly connected to the top of the support frame (2), characterized in that, It also includes a connecting mechanism (3) and a rail clamping mechanism (4). The rail clamping mechanism (4) is located inside the support frame (2) and below the hydraulic pump (1). The connecting mechanism (3) extends vertically through the top of the support frame (2), and its two ends are fixedly connected to the hydraulic pump (1) and the rail clamping mechanism (4) respectively, so that the rail clamping mechanism (4) can be driven to move vertically by the hydraulic pump (1).

2. The portable rail lifting frame according to claim 1, characterized in that, The support frame (2) includes a frame (21), which is horizontally arranged and has a horizontal support plate (22) at the center of its top end. Vertical support rods (23) are provided at the four corners of its bottom end. The support plate (22) is arranged along the width direction of the frame (21). The piston rod of the hydraulic pump (1) is vertically downward and fixedly connected to the center of the support plate (22).

3. The portable rail lifting frame according to claim 2, characterized in that, The connecting mechanism (3) includes two clamping plates (31) and two screws (32). The support plate (22) has two vertically downward through holes (24) on both sides of the hydraulic pump (1). The two clamping plates (31) are respectively located on both sides of the hydraulic pump (1) and clamped by two locking bolts. The gap between them is located directly above the two through holes (24). The two screws (32) pass through the gap between the two clamping plates (31) from both ends and then pass vertically through the corresponding through holes (24). The bottom end of each screw (32) is fixedly connected to the rail clamping mechanism (4), and its top end is threaded with two nuts (33) located at the top and bottom of the two clamping plates (31) respectively. The screws (32) are connected to the clamping plates (31) by the two nuts (33).

4. The portable rail lifting frame according to claim 3, characterized in that, The rail clamping mechanism (4) includes a hinge shaft (41) and two connecting plates (42). The top ends of the two connecting plates (42) are fixedly connected to the bottom ends of the corresponding screws (32). Each connecting plate (42) has a rail clamping arm (43) on both sides. The hinge shaft (41) connects the bottom of each connecting plate (42) and the top of each rail clamping arm (43) so that the rail clamping arm (43) can rotate around the hinge shaft (41) as the axis.

5. The portable rail lifting frame according to claim 4, characterized in that, The rail clamping mechanism (4) also includes two U-shaped pull members (44), one end of each pull member (44) is rotatably connected to the two adjacent rail clamping arms (43), and the other end extends through the frame (21) to the top.

6. The portable rail lifting frame according to claim 4, characterized in that, Each of the clamping arms (43) is provided with a rotatable roller (45) at one end away from the connecting plate (42).

7. The portable rail lifting frame according to any one of claims 2-6, characterized in that, A crossbar (25) is provided in the middle of the two adjacent support rods (23), and rollers (26) are provided at the bottom of both. The two ends of the rollers (26) are rotatably connected to the corresponding two support rods (23) through bearings.

8. The portable rail lifting frame according to claim 7, characterized in that, It also includes a pressure rod (5) adapted to the hydraulic pump (1), and the front side wall of the frame (21) is provided with a rod ring (27) for placing the pressure rod (5).

9. The portable rail lifting frame according to claim 8, characterized in that, The left side wall of the frame (21) is provided with a pull ring (28), and the bottom end of each support rod (23) is provided with an anti-slip layer.

Images