A device for hot straightening of groove rail after normalizing
By designing a straightening device for grooved rails, combined with a manual hydraulic jack and gauge, efficient four-way straightening of grooved rails was achieved, solving the accuracy problem of welded joints of grooved rails and improving the straightness and stability of the rails.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA TIESIJU CIVIL ENGINEERING GROUP CO LTD
- Filing Date
- 2023-05-18
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies cannot effectively meet the high-precision straightness requirements of grooved rail welded joints, leading to increased track vibration and defects, and there is a lack of suitable thermal straightening devices for grooved rails.
A device was designed that includes a grooved rail straightening frame, a frame support rod mechanism, a grooved rail linkage mechanism, a manual hydraulic jack, and a gauge. The device uses the manual hydraulic jack to provide pressure and the gauge to measure, thereby achieving four-way straightening of the grooved rail.
It achieves efficient and stable four-way straightening of grooved rails, adapts to on-site construction conditions, reduces equipment weight and construction difficulty, and improves straightening accuracy and efficiency.
Smart Images
Figure CN116586464B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of railway engineering machinery and equipment manufacturing technology, specifically relating to a device for on-site hot straightening of grooved rails after normalizing. Background Technology
[0002] In recent years, due to the advancement of the urbanization and rail transit acceleration strategy, my country's newly built tram lines have placed higher demands on the straightening of rails after on-site welding. Further acceleration of rail transit requires even higher standards for rail straightness, leading to increased demand for on-site straightening of channel rails. Therefore, there is a need to develop equipment that is lightweight, easy for on-site personnel to use, and whose straightening effect meets operational requirements.
[0003] After rail welding is completed, the joint needs to be normalized. After welding and heat treatment, the straightness of the rail at the joint location will be affected, thus impacting traffic safety. External quality requirements for rail welded joints include a defect-free surface, high geometrical accuracy, and high straightness. Among these, the straightness of the welded joint has the greatest impact and is the most difficult to achieve at a high precision.
[0004] The weld seam of the channel rail joint is a weak point in the track. If the straightness of the channel rail does not meet the requirements, vibrations will occur when the tram passes. Under the influence of repeated loads from the tram wheels and the temperature force of the seamless track, the track condition will change rapidly, gradually developing into defects. This will further aggravate the destructive effect of the tram on the track, creating a vicious cycle that accelerates the development of defects and ultimately leads to rail breakage.
[0005] Rail straightness is a crucial parameter determining rail lifespan and affecting locomotive operating speed. Domestically, two-way rail straightening machines are commonly used, but these suffer from low straightening accuracy and efficiency. Furthermore, these machines are unsuitable for straightening rails already laid on-site. However, to ensure more stable tram operation, four-way straightening functionality has become essential, simultaneously improving both accuracy and efficiency.
[0006] Tram lines are mostly buried, with tracks laid in the middle or along the sides of city roads, sharing right-of-way with other vehicles. Therefore, channel steel rails with a special grooved structure are used as tram tracks. With the recent development of tram systems, the use of channel rails is gradually increasing. Due to the special structure of channel steel, directly using straightening equipment designed for ordinary steel rails can easily cause irreversible damage such as deformation of the grooved structure. Currently, commercially available rail straightening devices are only designed for ordinary steel rails, such as 60mm and 75mm rails. There is no hot straightening device specifically for channel rails.
[0007] Similarly, due to the special groove structure of channel rails, the cross-sectional shape of the joint is more complex than that of ordinary rails. Straightening at the groove requires a higher level of equipment design and capability to achieve uniform straightening of the entire joint and prevent straightening deviations at the groove.
[0008] In summary, there is an urgent need to design and develop an efficient and stable on-site four-way straightening device for channel rails. Summary of the Invention
[0009] To address the aforementioned problems in the existing technology, a device for on-site hot straightening of grooved rails after normalizing is proposed, the specific solution of which is as follows: A device for on-site hot straightening of channel rails after normalizing includes a channel rail straightening frame, a frame support rod mechanism, a channel rail connecting rod mechanism, a manual hydraulic jack, and a gauge. The frame support rod mechanism is connected to the channel rail straightening frame. Channel rail connecting rod mechanisms are provided at both ends of the channel rail straightening frame. The manual hydraulic jack is placed below the channel rail straightening frame, and the gauge is placed beside the channel rail.
[0010] Furthermore, the grooved rail straightening machine frame includes a frame, with lifting blocks at both ends of the frame, a grooved rail top contour block below the lifting blocks, and multiple support rod rotating seats on the side of the frame.
[0011] Furthermore, the frame support rod mechanism includes a support rod, the bottom of which is connected to a universal foot, and the top of which is provided with a support rod rotation handle.
[0012] Furthermore, the grooved rail linkage mechanism includes a first linkage fixing seat, with connecting rods at both ends of the first linkage fixing seat. The two connecting rods are simultaneously sleeved with a second linkage fixing seat. The second linkage fixing seat is connected to the connecting rods through a connecting rod nut, and the first linkage fixing seat is connected to the connecting rods through a connecting pin.
[0013] Furthermore, the manual hydraulic jack includes a manual pump and a jack section, with the jack section located below the trough rail straightening machine frame and the manual pump located outside the trough rail straightening machine frame.
[0014] Furthermore, the measuring rod is a 1-meter measuring rod.
[0015] The advantages of this application are: 1. The device of this application has a simple structure and is lightweight, with the straightening frame weighing approximately 40KG, which does not require much handling effort during on-site construction.
[0016] 2. The support rod of this application has a universal foot at the bottom, which has good adaptability to uneven ground conditions during on-site construction.
[0017] 3. The pressure required by this application can be provided without a hydraulic pump, which is convenient and economical for on-site construction.
[0018] 4. This application can straighten the rail in four directions, while many other straightening devices can only straighten the rail in two directions, up and down. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the downward straightening of the grooved rail in this application.
[0020] Figure 2 This is a schematic diagram of the trough-shaped rail straightening machine frame structure.
[0021] Figure 3 This is a schematic diagram of the frame support rod mechanism.
[0022] Figure 4 This is a schematic diagram of a grooved rail linkage mechanism.
[0023] Figure 5 This is a schematic diagram of the left and right straightening of the grooved rail in this application.
[0024] Figure 6 This is a schematic diagram of the straightening of the grooved rail in this application.
[0025] Figure 7 This is a schematic diagram of the height-increasing block.
[0026] In the attached image: 1-Slotted rail straightening machine frame, 2-Frame support rod mechanism, 3-Slotted rail connecting rod mechanism, 4-Manual hydraulic jack, 5-Guide ruler, 101-Frame, 102-Heightening block, 103-Slotted rail top contour block, 104-Support rod rotating seat, 201-Universal foot, 202-Support rod rotating handle, 203-Support rod, 301-First connecting rod fixing seat, 302-Second connecting rod fixing seat, 303-Connecting rod, 304-Connecting rod nut, 305-Connecting pin. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0030] In the description of this application, it should be noted that the terms "upper," "vertical," "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 product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" 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 mechanical connection or an electrical 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 application based on the specific circumstances.
[0032] Example 1 A device for on-site hot straightening of channel rails after normalizing includes a channel rail straightening frame 1, a frame support rod mechanism 2, a channel rail connecting rod mechanism 3, a manual hydraulic jack 4, and a gauge 5. The frame support rod mechanism 2 is connected to the channel rail straightening frame 1. Channel rail connecting rod mechanisms 3 are provided at both ends of the channel rail straightening frame 1. The manual hydraulic jack 4 is placed below the channel rail straightening frame 1, and the gauge 5 is placed beside the channel rail.
[0033] The working principle is as follows: Step 1: After the channel rail is normalized, the frame support rod mechanism 2 is connected to the rail straightening frame 101 through the support rod rotating seat 104 and then placed on the installation channel rail.
[0034] Step 2: Connect the bottom of the rail to the grooved rail straightening frame 1 via a linkage mechanism.
[0035] Step 3: Place the jack section of the split hydraulic jack under the rail straightening machine frame 1, and apply pressure using a manual pump to straighten the rail with the jack.
[0036] Step 4: Use a 1-meter gauge and feeler gauge to determine if straightening is complete. If not, continue applying force and check again until straightening meets the requirements. If complete, remove the rail straightening mechanism from the rail; straightening is now finished.
[0037] The device of this application has a simple structure and is lightweight; the straightening frame 101 weighs approximately 40 kg, requiring minimal handling effort during on-site construction. The support rod 203 has universal feet at the bottom, providing good adaptability to uneven ground conditions during on-site construction. The pressure required by this application can be provided without a hydraulic pump, offering excellent portability and economy for on-site construction. This application can straighten rails in four directions, while many other straightening devices can only achieve vertical straightening.
[0038] Example 2 A device for on-site hot straightening of channel rails after normalizing includes a channel rail straightening frame 1, a frame support rod mechanism 2, a channel rail connecting rod mechanism 3, a manual hydraulic jack 4, and a gauge 5. The frame support rod mechanism 2 is connected to the channel rail straightening frame 1. Channel rail connecting rod mechanisms 3 are provided at both ends of the channel rail straightening frame 1. The manual hydraulic jack 4 is placed below the channel rail straightening frame 1, and the gauge 5 is placed beside the channel rail.
[0039] The grooved rail straightening machine frame 1 includes a frame 101, with heightening blocks 102 at both ends of the frame 101, and a grooved rail top contour block 103 below the heightening blocks 102. Multiple support rod rotating seats 104 are provided on the side of the frame 101.
[0040] The riser block 102 is a structure that raises the space between the frame 101 and the rail when the rail is straightened downwards or upwards. The grooved rail top contour block 103 and the riser block 102 both have smooth holes in the same position. The frame 101 has threaded holes in the same position. The grooved rail contour block and the riser block 102 are connected as a whole by using hexagonal socket screws and then connected to the threaded holes of the frame 101.
[0041] The frame support rod mechanism 2 includes a support rod 203, the bottom of which is connected to the universal foot 201, and the top of which is provided with a support rod rotating handle 202.
[0042] The grooved rail linkage mechanism 3 includes a first linkage fixing seat 301. Linkages 303 are provided at both ends of the first linkage fixing seat 301. The two linkages 303 are simultaneously sleeved with a second linkage fixing seat 302. The second linkage fixing seat 302 is connected to the linkages 303 through a linkage nut 304. The first linkage fixing seat 301 is connected to the linkages 303 through a connecting pin 305.
[0043] The manual hydraulic jack 4 includes a manual pump and a jack section. The jack section is located below the grooved rail straightening machine frame 1, and the manual pump is located outside the grooved rail straightening machine frame 1.
[0044] Ruler 5 is a 1-meter ruler.
[0045] After the rail normalizing process, the rail is placed on the first connecting rod fixing seat 301. The overall height of the channel rail straightening machine frame 1 is adjusted by rotating the handle 202 on the support rod. Simultaneously, the second connecting rod fixing seat 302 is placed on the frame 101, and the manual hydraulic jack 4 is placed below the frame 101, with one end of the jack in contact with the frame 101 and the other end in contact with the channel rail. The channel rail connecting rod mechanism 3 is connected to the channel rail and the channel rail straightening machine frame 1 via the connecting rod nut 304. Finally, the manual hydraulic pump applies force to the rail with the jack, thereby straightening the channel rail. During this process, a one-meter straightedge is used to measure the straightness of the channel rail.
[0046] The specific steps for downward straightening are as follows: Step 1: First, connect the grooved rail straightening frame 1 and the frame support rod mechanism 2 into a whole using bolts; Step 2: After the rail normalizing is completed, the construction personnel place the hot rail on the channel rail linkage mechanism 3; and place the channel rail straightening frame 1, which is connected as a whole, directly above the hot rail, with one channel rail linkage mechanism 3 on each side of the channel rail straightening frame 1.
[0047] Step 3: Place the manual hydraulic jack 4 under the channel rail straightening machine frame 1, and tighten the connecting rod nut 304 to ensure a tight connection between the channel rail connecting rod mechanism 3 and the channel rail straightening machine frame 1 and the hot rail. Figure 1 As shown; Step 4: Use manual hydraulic jack 4 to push the jack out and maintain continuous force for more than 30 seconds before releasing the jack. Use gauge 5 to measure the straightness of the rail. Repeat this process until the rail is straight enough to meet the requirements. Step 5: After the hot rail straightening is completed, remove the straightening mechanism.
[0048] The specific steps for left-right alignment are as follows: Step 1: First, connect the grooved rail straightening frame 1 and the frame support rod mechanism 2 into a whole using bolts; Step 2: After the rail normalizing is completed, the construction personnel place the hot rail on the channel rail connecting mechanism 3; and connect the channel rail straightening frame 1, which is connected as a whole, to the channel rail connecting mechanism 3, and make it parallel to the rail web side. There is one channel rail connecting mechanism 3 on each side of the channel rail straightening frame 1.
[0049] Step 3: Place the manual hydraulic jack 4 under the channel rail straightening machine frame 1, and tighten the connecting rod nut 304 to ensure a tight connection between the channel rail connecting rod mechanism 3 and the channel rail straightening machine frame 1 and the hot rail. Figure 5 As shown; Step 4: Use the manual hydraulic jack 4 to push the jack out and maintain the force for more than 30 seconds before releasing the jack. Use the 5-gauge 5 to measure the straightness of the rail. Repeat this process until the rail is straight enough to meet the requirements. Step 5: After the hot rail straightening is completed, remove the straightening mechanism.
[0050] The specific steps for upward straightening are as follows: Step 1: First, connect the grooved rail straightening frame 1 and the frame support rod mechanism 2 into a whole using bolts; Step 2: After the rail normalizing is completed, the construction personnel place the hot rail on the channel rail connecting mechanism 3; and bring the channel rail top contour block 103 on the channel rail straightening frame 1 into contact with the top of the hot rail, while placing the channel rail connecting mechanism 3 at the center of the channel rail straightening frame 1.
[0051] Step 3: Place the manual hydraulic jack 4 above the channel rail straightening machine frame 1, with the top of the jack piston rod contacting the top of the channel rail straightening machine frame 1 and the bottom of the jack contacting the bottom of the second connecting rod fixing seat 302. Tighten the connecting rod nut 304 to ensure a tight connection between the channel rail connecting rod mechanism 3 and the channel rail straightening machine frame 1 with the hot rail. Figure 6 As shown; Step 4: Use manual hydraulic jack 4 to push the jack out and maintain continuous force for more than 30 seconds before releasing the jack. Use gauge 5 to measure the straightness of the rail. Repeat this process until the rail is straight enough to meet the requirements. Step 5: After the hot rail straightening is completed, remove the straightening mechanism.
Claims
1. A device for on-site hot straightening of grooved rails after normalizing, characterized in that: The device is capable of overall straightening, upward straightening, downward straightening and left and right straightening of the grooved rail. The device includes a grooved rail straightening frame (1), a frame support rod mechanism (2), a grooved rail connecting rod mechanism (3), a manual hydraulic jack (4) and a gauge (5). The frame support rod mechanism (2) is connected to the grooved rail straightening frame (1). When performing overall straightening, downward straightening and left and right straightening, the grooved rail straightening frame (1) is equipped with a grooved rail connecting rod mechanism (3) at both ends. The jack part of the manual hydraulic jack (4) is placed below the grooved rail straightening frame (1). When straightening upwards, the grooved rail linkage mechanism (3) is placed at the center of the grooved rail straightening frame (1), and the jack part of the manual hydraulic jack (4) is placed above the grooved rail straightening frame (1). The ruler (5) is placed next to the grooved rail; The grooved rail straightening frame (1) includes a frame (101), and both ends of the frame (101) are provided with lifting blocks (102). The lifting blocks (102) are structures that raise the gap between the frame (101) and the grooved rail when the grooved rail is straightened downward or upward. The grooved rail top contour block (103) is provided below the lifting blocks (102). Multiple support rod rotating seats (104) are provided on the side of the frame (101). The frame support rod mechanism (2) is connected to the grooved rail straightening frame (1) through the support rod rotating seats (104). The grooved rail linkage mechanism (3) includes a first linkage fixing seat (301), with connecting rods (303) provided at both ends of the first linkage fixing seat (301). The two connecting rods (303) are simultaneously sleeved with a second linkage fixing seat (302). The second linkage fixing seat (302) is connected to the connecting rod (303) through a connecting rod nut (304). The first linkage fixing seat (301) is connected to the connecting rod (303) through a connecting pin (305). The connecting rod nut (304) connects the grooved rail connecting rod mechanism (3) to the grooved rail and the grooved rail straightening frame (1); The frame support rod mechanism (2) includes a support rod (203). The bottom of the support rod (203) is connected to the universal foot (201). The top of the support rod (203) is provided with a support rod rotating handle (202). By rotating the support rod handle (202), the overall height of the grooved rail straightening frame (1) can be adjusted.
2. The device for on-site hot straightening of grooved rails after normalizing, as described in claim 1, is characterized in that: The manual hydraulic jack (4) also includes a manual pump, which is located outside the grooved rail straightening frame (1).
3. The device for on-site hot straightening of grooved rails after normalizing, as described in claim 1, is characterized in that: The ruler (5) is a 1-meter ruler.
4. A device for on-site hot straightening of grooved rails after normalizing, as described in any one of claims 1-3, characterized in that: The overall straightening steps are as follows: Step 1: After the channel rail is normalized, the frame support rod mechanism (2) and the channel rail straightening frame (1) are connected together through the support rod rotating seat (104) and then placed on the channel rail; Step 2: Connect the bottom of the grooved rail to the grooved rail straightening frame (1) through the grooved rail linkage mechanism (3); Step 3: Place the jack part of the manual hydraulic jack (4) under the grooved rail straightening machine frame (1) and apply pressure through the manual pump to straighten the grooved rail with the jack; Step 4: Use the gauge (5) and feeler gauge to determine whether the straightening is complete. If not, continue to apply force and check again until the straightening meets the requirements. If complete, remove the device used for on-site hot straightening of the channel rail after normalizing from the channel rail, and the straightening is finished.
5. The device for on-site hot straightening of grooved rails after normalizing, as described in claim 4, is characterized in that: The specific steps for downward straightening are as follows: Step 1: First, connect the grooved rail straightening frame (1) and the frame support rod mechanism (2) into a whole by bolting; Step 2: After the channel rail is normalized, place the hot channel rail on the channel rail linkage mechanism (3); and place the channel rail straightening frame (1) and the frame support rod mechanism (2) connected as a whole on top of the hot channel rail. The channel rail linkage mechanism (3) is located on both sides of the channel rail straightening frame (1). Step 3: Place the jack part of the manual hydraulic jack (4) under the grooved rail straightening machine frame (1), and tighten the connecting rod nut (304) to make the grooved rail connecting rod mechanism (3) tightly connect the grooved rail straightening machine frame (1) with the hot grooved rail; Step 4: Use a manual hydraulic jack (4) to push the jack out and maintain the force for more than 30 seconds before releasing the jack. Use a ruler (5) to measure the straightness of the grooved rail. Repeat this process until the grooved rail is straight enough to meet the requirements. Step 5: After the hot-state straightening of the grooved rail is completed, remove the device used for on-site hot straightening of the grooved rail after normalizing.
6. The device for on-site hot straightening of grooved rails after normalizing, as described in claim 4, is characterized in that: The specific steps for left-right alignment are as follows: Step 1: First, connect the grooved rail straightening frame (1) and the frame support rod mechanism (2) into a whole by bolting; Step 2: After the normalizing of the grooved rail is completed, place the hot grooved rail on the grooved rail linkage mechanism (3); connect the grooved rail straightening frame (1) to the grooved rail linkage mechanism (3) and make it parallel to the waist side of the grooved rail. The grooved rail linkage mechanism (3) is located on both sides of the grooved rail straightening frame (1). Step 3: Place the jack part of the manual hydraulic jack (4) under the grooved rail straightening machine frame (1), and tighten the connecting rod nut (304) to make the grooved rail connecting rod mechanism (3) tightly connect the grooved rail straightening machine frame (1) with the hot grooved rail; Step 4: Use a manual hydraulic jack (4) to push the jack out and maintain the force for more than 30 seconds before releasing the jack. Use a ruler (5) to measure the straightness of the grooved rail. Repeat this process until the grooved rail is straight enough to meet the requirements. Step 5: After the hot-state straightening of the grooved rail is completed, remove the device used for on-site hot straightening of the grooved rail after normalizing.
7. The device for on-site hot straightening of grooved rails after normalizing, as described in claim 4, is characterized in that: The specific steps for upward straightening are as follows: Step 1: First, connect the grooved rail straightening frame (1) and the frame support rod mechanism (2) into a whole by bolting; Step 2: After the normalizing of the grooved rail is completed, the construction personnel place the hot grooved rail on the grooved rail linkage mechanism (3); and bring the grooved rail top contour block (103) on the grooved rail straightening frame (1) into contact with the hot grooved rail top, while placing the grooved rail linkage mechanism (3) at the center of the grooved rail straightening frame (1); Step 3: Place the jack part of the manual hydraulic jack (4) above the grooved rail straightening machine frame (1), with the top of the jack piston rod in contact with the top of the grooved rail straightening machine frame (1) and the bottom of the jack in contact with the bottom of the second connecting rod fixing seat. Tighten the connecting rod nut (304) to make the grooved rail connecting rod mechanism (3) tightly connect the grooved rail straightening machine frame (1) with the hot grooved rail. Step 4: Use a manual hydraulic jack (4) to push the jack out and maintain the force for more than 30 seconds before releasing the jack. Use a ruler (5) to measure the straightness of the grooved rail. Repeat this process until the grooved rail is straight enough to meet the requirements. Step 5: After the hot-state straightening of the grooved rail is completed, remove the device used for on-site hot straightening of the grooved rail after normalizing.