Steel rail welding auxiliary supporting pad butt joint device

Abstract

A steel rail welding auxiliary supporting pad butt joint device belongs to the technical field of railway track installation accessories and comprises a base, a supporting frame is arranged on the top face of the base, a bearing frame is arranged on the supporting frame, and a first guide shaft protruding out of the top face of the bearing frame is arranged in the bearing frame; the supporting frame is further provided with two height adjusting screw rods, the two height adjusting screw rods are arranged at the two ends of a first guide shaft respectively, the height adjusting screw rods penetrate through the supporting frame and extend downwards into the supporting frame, and first nut seats matched with the height adjusting screw rods are arranged in the supporting frame. One end of the guide shaft I is provided with a transverse adjusting screw rod for adjusting the axial movement of the guide shaft I relative to the bearing frame; the two height adjusting screw rods are matched with the corresponding first nut seats, the second supporting plate abuts against the bottom face of the bearing frame, and the height of the bearing frame can be controlled; the first guide shaft protrudes out of the top face of the bearing frame to support the steel rail, and the friction force between the steel rail and the supporting cushion device is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of railway track installation accessories, specifically a rail welding auxiliary support docking device. Background Technology

[0002] In railway rail laying and maintenance, on-site pneumatic welding is widely used due to its high efficiency and superior weld performance. This process requires the straightness of the rails to be welded to strictly meet the specifications of the "Technical Conditions for Rail Welding" (TB / T 1632), typically requiring a smoothness deviation of no more than 0.3 mm / m on the top surface and inner working surface of the rail. To achieve this technical specification, the traditional construction method uses the "climbing method" for rail alignment. This involves setting up support devices at different heights at both ends of the rail to be welded, and adjusting the height of the support blocks to create a continuously transitioning climbing surface, ensuring the rail reaches the preset straightness requirement before welding.

[0003] In practice, construction workers need to calculate the height difference of the pads based on the original condition of the rails and welding standards, and generally use a combination of steel pads with a thickness of 5-30mm. This method has revealed the following technical problems in practical application: First, the adjustment of the pad height relies on manual experience and judgment, which has a large subjective error, making it difficult to consistently control the rail straightness qualification rate; second, the frequent replacement of pads of different specifications reduces construction efficiency, with each weld requiring an average of 40-60 minutes for pad adjustment; third, the contact area between the pads and the rail base is limited (usually less than 150cm²), making them prone to displacement or deformation under train dynamic loads, threatening traffic safety.

[0004] More critically, existing support systems lack real-time monitoring and dynamic compensation mechanisms. When uneven settlement occurs on the track or trains pass and vibrate, the height of the support blocks changes, causing the straightness of the already adjusted rails to exceed the standard again. Statistics show that in traditional climbing method construction, about 18% of welds require secondary adjustments due to the instability of the support system, seriously affecting construction progress and welding quality. Utility Model Content

[0005] To address the problem of poor welding quality and the need for secondary adjustments due to the inconvenience of adjusting the support pads during rail welding, this utility model provides a rail welding auxiliary support pad docking device.

[0006] This utility model is achieved through the following technical solution:

[0007] A rail welding auxiliary support and docking device includes a base, a support frame on the top surface of the base, a support bracket on the support frame, and a guide shaft protruding from the top surface of the support bracket. The support bracket also has two height adjusting screws, each located at one end of the guide shaft. The height adjusting screws extend downwards through the support bracket into the support frame. A nut seat adapted to the height adjusting screw is located within the support frame. The combination of the height adjusting screw and the nut seat allows for flexible adjustment of the support bracket's height to adapt to different track conditions and the original state of the rail. A support plate abuts against the bottom surface of the support bracket on the height adjusting screw.

[0008] Two height-adjusting screws engage with corresponding nut seats, and support plate two abuts against the bottom surface of the support frame, enabling precise control of the support frame's height. Compared to the traditional method of adjusting the height of the pads based on manual experience, this significantly improves adjustment accuracy. Construction workers can finely adjust the support frame's height by rotating the height-adjusting screws. Guide shaft one protrudes from the top surface of the support frame, providing rolling support for the rails and reducing friction between the rails and the support device. Under the dynamic load of the train, the risk of rail displacement and deformation is reduced. Simultaneously, support plate two on the height-adjusting screw abuts against the bottom surface of the support frame, increasing the contact area and support stability between the support frame and the support structure.

[0009] A further improvement of this invention is that both ends of the guide shaft are connected to the support frame via bearing seats. By connecting both ends of the guide shaft to the support frame with bearing seats, the frictional force during the rotation of the guide shaft is greatly reduced, making the rotation of the guide shaft more flexible and smooth. During the alignment operation before welding the rails, the rails can easily roll on the guide shaft, facilitating fine-tuning of the rail position by construction personnel and improving the accuracy and efficiency of rail alignment. Moreover, the bearing seats effectively support the guide shaft, enhancing its stability and reducing swaying and displacement of the guide shaft caused by vibration or external impact, ensuring the reliability of the entire support docking device during use. Compared with traditional fixed support methods, this design can better adapt to the small displacements and deformations of the rails during the welding process, improving the welding quality.

[0010] A further improvement of this invention is that the guide shaft is provided with two limiting plates, the distance between which is greater than the width of the rail base. The two limiting plates provide reliable lateral restraint for the rail. When the rail is placed on the guide shaft, the support frame can be raised and lowered by operating the height adjustment screw on one side, allowing one of the limiting plates to adjust the rail's movement left and right. After adjustment, the support frame is in a horizontal position, ensuring the rail remains in the correct position during welding and improving welding accuracy. Simultaneously, because the distance between the limiting plates is greater than the width of the rail base, it ensures effective restraint of the rail without obstructing its normal placement and rolling, making the construction process smoother.

[0011] A further improvement of this invention is that an operating head is connected to the top of the aforementioned height adjusting screw. The design of the operating head facilitates the operation of the height adjusting screw. Construction workers can more easily rotate the height adjusting screw using the operating head. Compared to directly operating the screw, the operating head increases the radius of the force application point, making the adjustment process more labor-saving. This design reduces the labor intensity of construction workers and improves the convenience and efficiency of operation, especially when the height of the support frame needs to be frequently adjusted, where its advantages are even more pronounced.

[0012] A further improvement of this invention is that the aforementioned operating head is a cylindrical structure; however, to facilitate rotation of the operating head, it can also be configured as a hexagonal prism structure, which is compatible with common wrenches. Construction workers can use a standard wrench to rotate the operating head, achieving precise control of the height adjustment screw. This standardized design makes operation more standardized and accurate, avoiding adjustment errors caused by incompatible tools. Furthermore, the hexagonal prism structure has good stability and load-bearing capacity, capable of withstanding large torques, ensuring that the operating head will not be damaged during adjustment, thus improving the durability of the device.

[0013] A further improvement of this utility model is that the aforementioned operating head is provided with an adjustment hole, and an operating wrench is detachably connected to the adjustment hole. The addition of the adjustment hole further enriches the operating methods of the operating head, allowing the operating wrench to be extended into the adjustment hole for convenient rotation of the operating head. This design increases operational flexibility, allowing construction personnel to choose the most suitable operating method based on actual site conditions and tool availability. Simultaneously, the adjustment hole can also serve as a positioning marker, facilitating accurate control of the rotation angle of the height adjustment screw by construction personnel, thus improving adjustment precision.

[0014] A further improvement of this invention is that the support bracket has a through hole with a diameter larger than that of the height adjusting screw. This through hole provides sufficient space for the height adjusting screw to move. During the rotation of the height adjusting screw, even with some deviation or tilt, it will not be obstructed by the support bracket, ensuring smooth up-and-down movement. This design reduces jamming during adjustment and improves the smoothness and efficiency of the adjustment. Furthermore, the gap between the through hole and the height adjusting screw also acts as a buffer, reducing damage to the height adjusting screw and support bracket caused by vibration or external impact.

[0015] A further improvement of this utility model is that the aforementioned height adjusting screw is also provided with a support plate one, which is located above the support frame, and the distance between the support plate one and the support plate two is greater than the height of the support frame. The distance between the support plate one and the support plate two, which is greater than the height of the support frame, provides sufficient space for height adjustment of the support frame, resulting in a wider adjustment range and better adaptability to different construction needs.

[0016] A further improvement of this utility model is that the aforementioned support frame as a whole includes a horizontal plate and a vertical plate, with one end of the horizontal plate and one end of the vertical plate perpendicularly connected; two support frames are provided, each corresponding to one end of the support frame. The right-angled structure of the support frame has good stability and load-bearing capacity. The two support frames, corresponding to the two ends of the support frame, can evenly distribute the weight of the support frame and the rail, avoiding excessive local stress. This design enhances the structural stability of the entire support and mating device, improves its load-bearing capacity, and better adapts to different construction environments and working conditions. At the same time, the right-angled structure of the support frame facilitates installation and fixing, allowing construction personnel to more easily install the device on the base, improving construction efficiency.

[0017] As can be seen from the above technical solution, the beneficial effects of this utility model are as follows: the two height adjusting screws cooperate with the corresponding nut seat one, and the support plate two abuts against the bottom surface of the support frame, which can accurately control the height of the support frame; compared with the traditional method of adjusting the height of the pad by manual experience, its adjustment accuracy is greatly improved; construction personnel can make fine adjustments to the height of the support frame by rotating the height adjusting screws; the guide shaft one protrudes from the top surface of the support frame, providing rolling support for the rail and reducing the friction between the rail and the support device; under the action of train dynamic load, the risk of rail displacement and deformation is reduced; at the same time, the support plate two on the height adjusting screw abuts against the bottom surface of the support frame, increasing the contact area and support stability between the support frame and the support frame. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of the height adjustment screw in a specific embodiment of the present invention.

[0021] Figure 3 This is a structural schematic diagram of a specific embodiment two of the present utility model.

[0022] Figure 4 This is a structural schematic diagram of a specific embodiment three of the present utility model.

[0023] Figure 5 This is a schematic diagram of the first structure of a specific embodiment four of this utility model.

[0024] Figure 6 This is a schematic diagram of the second structure of a specific embodiment four of this utility model.

[0025] Figure 7 This is a schematic diagram of the pressure plate assembly structure in specific embodiment four of this utility model.

[0026] In the attached diagram: 10. Base; 11. Base slot; 20. Support frame; 21. Horizontal plate; 22. Vertical plate; 30. Support bracket; 40. Guide shaft one; 41. Limiting plate; 42. Bearing seat; 50. Height adjustment screw; 51. Support plate one; 52. Support plate two; 53. Operating head one; 531. Adjustment hole; 54. Operating wrench; 55. Nut seat one; 56. Operating head two; 57. Nut seat two; 60. Guide shaft two; 70. Lateral adjustment screw; 80. Support plate; 81. Limiting strip; 90. Clamping assembly; 91. Pressure plate; 911. Clearance groove; 92. Pressure plate bolt; 93. Operating head three; 94. Nut seat three; 95. Guide column. Detailed Implementation

[0027] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0028] Example 1:

[0029] like Figures 1-2 As shown, this utility model discloses a rail welding auxiliary support docking device, including a base 10. The base 10 is provided with two base slots 11 that communicate with the outside. The base slots 11 can cooperate with the fixing bolts on the sleeper to complete the fixed placement of the base 10 on the sleeper. The principle is that the base 10 needs to be placed on the sleeper for use, so opening the base slots 11 helps to improve the stability of the placement.

[0030] The base 10 has a support frame 20 on its top surface, and a support bracket 30 on the support frame 20. A guide shaft 40 protruding from the top surface of the support bracket 30 is provided inside the support bracket 30. The support bracket 30 also has two height adjusting screws 50, which are respectively located at both ends of the guide shaft 40. The height adjusting screws 50 extend downwards through the support bracket 30 into the support frame 20. A nut seat 55 adapted to the height adjusting screw 50 is provided inside the support frame 20. The combination of the height adjusting screw 50 and the nut seat 55 allows for flexible adjustment of the height of the support bracket 30 to adapt to different track conditions and the original state of the rails. A support plate 52 abuts against the bottom surface of the support bracket 30 on the height adjusting screw 50.

[0031] Two height adjusting screws 50 engage with corresponding nut seats 55, and support plate 52 abuts against the bottom surface of support frame 30, enabling precise control of the height of support frame 30. Compared to the traditional method of adjusting the height of pads based on manual experience, the adjustment accuracy is significantly improved. Construction personnel can make fine adjustments to the height of support frame 30 by rotating the height adjusting screws 50. Guide shaft 40 protrudes from the top surface of support frame 30, providing rolling support for the rail and reducing the friction between the rail and the support device. Under the action of train dynamic load, the risk of rail displacement and deformation is reduced. At the same time, the support plate 52 on the height adjusting screws 50 abuts against the bottom surface of support frame 30, increasing the contact area and support stability between support frame 30 and support frame 20.

[0032] Both ends of the guide shaft 40 are connected to the support frame 30 via bearing seats 42. Connecting the guide shaft 40 to the support frame 30 with bearing seats 42 significantly reduces friction during rotation, allowing for smoother and more flexible rotation. During alignment before welding the rails, the rails can easily roll on the guide shaft 40, facilitating fine-tuning by construction personnel and improving alignment accuracy and efficiency. Furthermore, the bearing seats 42 effectively support the guide shaft 40, enhancing its stability and reducing swaying and displacement caused by vibration or external impact, ensuring the reliability of the entire support and connection device during use. Compared to traditional fixed support methods, this design better accommodates the minute displacements and deformations of the rails during welding, improving welding quality.

[0033] Two limiting plates 41 are provided on the guide shaft 40, and the distance between the two limiting plates 41 is greater than the width of the rail base. The two limiting plates 41 provide reliable lateral restraint for the rail. When the rail is placed on the guide shaft 40, the support frame 30 can be raised and lowered by operating the height adjustment screw 50 on one side, so that one of the limiting plates 41 can adjust the rail left and right. After adjustment, the support frame 30 is in a horizontal state, ensuring that the rail is always in the correct position during welding, thus improving welding accuracy. At the same time, since the distance between the limiting plates 41 is greater than the width of the rail base, it ensures effective restraint of the rail without hindering the normal placement and rolling of the rail, making the construction process smoother.

[0034] The support frame 30 has a through hole with a diameter larger than that of the height adjusting screw 50. This through hole provides sufficient space for the height adjusting screw 50 to move. During the rotation of the height adjusting screw 50, even with some deviation or tilt, it will not be obstructed by the support frame 30, ensuring smooth up-and-down movement. Especially when adjusting the rail in the left-right direction, the support frame 30 is in a state where one end is higher than the other; this through hole provides space to avoid tilting the support frame 30. This design reduces jamming during adjustment and improves the smoothness and efficiency of the adjustment. Furthermore, the gap between the through hole and the height adjusting screw 50 also acts as a buffer, reducing damage to the height adjusting screw 50 and the support frame 30 caused by vibration or external impact.

[0035] The height adjusting screw 50 is also equipped with a support plate 51, which is located above the support frame 30. The distance between the support plate 51 and the support plate 52 is greater than the height of the support frame 30. This greater distance provides sufficient space for height adjustment of the support frame 30, allowing for a wider adjustment range and better adaptability to different construction needs.

[0036] The height adjusting screw 50 is connected to an operating head 53 at its top. The design of the operating head 53 facilitates the operation of the height adjusting screw 50. Construction workers can more easily rotate the height adjusting screw 50 using the operating head 53. Compared to directly operating the screw, the operating head 53 increases the radius of the force application point, making the adjustment process more labor-saving. This design reduces the labor intensity of construction workers and improves the convenience and efficiency of operation, especially when the height of the support frame 30 needs frequent adjustments, where its advantages are even more pronounced.

[0037] The operating head 53 has a cylindrical structure; however, for easier rotation, it can also be configured as a hexagonal prism, which is compatible with common wrenches. Workers can use a standard wrench to rotate the operating head 53, achieving precise control of the height adjustment screw 50. This standardized design makes operation more standardized and accurate, avoiding adjustment errors caused by incompatible tools. Furthermore, the hexagonal prism structure has good stability and load-bearing capacity, capable of withstanding large torques, ensuring that the operating head 53 will not be damaged during adjustment, thus improving the durability of the device.

[0038] The operating head 53 is provided with an adjustment hole 531, and an operating wrench 54 is detachably connected to the adjustment hole 531. The opening of the adjustment hole 531 further enriches the operation methods of the operating head 53, and the operating wrench 54 can be extended into the adjustment hole 531 to facilitate the rotation of the operating head 53. This design increases the flexibility of operation, and the construction personnel can choose the most suitable operation method according to the actual site conditions and the availability of tools. At the same time, the adjustment hole 531 can also serve as a positioning mark, making it convenient for the construction personnel to accurately control the rotation angle of the height adjustment screw 50, thereby improving the adjustment accuracy.

[0039] The support frame 20 comprises a horizontal plate 21 and a vertical plate 22, with one end of the horizontal plate 21 and one end of the vertical plate 22 perpendicularly connected. Two support frames 20 are provided, each corresponding to one end of the support frame 30. The right-angled structure of the support frame 20 provides good stability and load-bearing capacity. The two support frames 20, corresponding to the two ends of the support frame 30, evenly distribute the weight of the support frame 30 and the rail, avoiding excessive local stress. This design enhances the structural stability of the entire support and connection device, improves its load-bearing capacity, and better adapts to different construction environments and working conditions. Simultaneously, the right-angled structure of the support frame 20 facilitates installation and fixation, allowing construction personnel to more easily install the device on the base 10, thus improving construction efficiency.

[0040] The nut seat 55 is embedded in the top surface of the horizontal plate 21. Alternatively, the nut seat 55 can also be fixedly installed on the bottom surface of the horizontal plate 21, with the height adjustment screw 50 passing through the entire horizontal plate 21 and threadedly connected to the nut seat 55.

[0041] Example 2:

[0042] like Figure 3 As shown, based on Embodiment 1, with everything else unchanged, a second guide shaft 60 is added to the support frame 30. The second guide shaft 60 is parallel to the first guide shaft 40 and is on the same horizontal plane. One end of the first guide shaft 40 is connected to a coaxially arranged transverse adjusting screw 70, which passes through the support frame 30 and is threadedly connected to a nut seat 57 fixedly installed on the support frame 30. The axial movement of the first guide shaft 40 relative to the support frame 30 is adjusted by rotating the transverse adjusting screw 70. The left and right directions can be adjusted using the limiting plate 41 on the first guide shaft 40, which is an I-shaped steel rail. The end of the transverse adjusting screw 70 is also provided with an operating head 56, which has a hexagonal prism structure, facilitating rotational adjustment using a wrench.

[0043] Example 3:

[0044] like Figure 4As shown, based on Embodiment 1, by removing the height adjusting screw 50 and making the guide shaft 40 adjustable relative to the support frame 30, a device for adjusting the rail left and right independently can be obtained. Specifically, one end of the guide shaft 40 is connected to a coaxially arranged lateral adjusting screw 70. The lateral adjusting screw 70 passes through the support frame 30 and is threadedly connected to a nut seat 57 fixedly installed on the support frame 30. By rotating the lateral adjusting screw 70, the axial movement of the guide shaft 40 relative to the support frame 30 can be adjusted. The limiting plate 41 on the guide shaft 40 can be used to adjust the rail with an I-shaped cross-section in the left and right directions. The end of the lateral adjusting screw 70 is also provided with an operating head 56. The operating head 56 has a hexagonal prism structure, which facilitates the rotation adjustment of the operating head 56 using a wrench.

[0045] Example 4:

[0046] like Figures 5-7 As shown, the base 10 is provided with a support plate 80 for supporting the rail. The support plate 80 has two limiting strips 81 that abut against both sides of the lower flange of the rail, thus limiting the rail's lateral movement on the support plate 80. Each side of the two limiting strips 81 is provided with a clamping assembly 90 for fixing the rail, thereby securing the rail. This design is particularly suitable for installing the device structure of this embodiment near the installation point during rail installation, reducing the impact of operations at nearby installation points on rail movement.

[0047] The clamping assembly 90 includes a pressure plate 91. A clearance groove 911 is formed on the bottom surface of the portion of the pressure plate 91 extending towards the rail placement position. The clearance groove 911 is designed to fit snugly against the top surface of the limiting strip 81 and the lower flange of the rail. This design helps to increase the fit between the pressure plate 91 and the top surface of the limiting strip 81 and the lower flange of the rail when the pressure plate 91 is fixed to the bearing plate 80, thus improving the clamping effect. Both the pressure plate 91 and the bearing plate 80 have corresponding through holes, with a pressure plate bolt 92 passing through each hole. A guide post 95, threadedly connected to the pressure plate bolt, is located below the bearing plate 90. A nut seat 94, threadedly connected to the pressure plate bolt 92, is located above the pressure plate 91. The clamping engagement between the nut seat 94 and the guide seat 95 completes the clamping installation of the pressure plate 91 on the bearing plate 90. To facilitate the rotation of the pressure plate bolt 92, an operating head 3 93 can be provided on the top of the pressure plate bolt 92. The operating head 3 93 has a hexagonal prism structure.

[0048] This utility model discloses a rail welding auxiliary support and mating device. Two height adjusting screws engage with corresponding nut seats, and a second support plate abuts against the bottom surface of the support frame, enabling precise control of the support frame height. Compared to the traditional method of adjusting the height of the pads based on manual experience, its adjustment accuracy is significantly improved. Construction personnel can finely adjust the support frame height by rotating the height adjusting screws. A guide shaft protrudes from the top surface of the support frame, providing rolling support for the rail and reducing friction between the rail and the support device. Under the dynamic load of a train, the risk of rail displacement and deformation is reduced. Simultaneously, the second support plate on the height adjusting screw abuts against the bottom surface of the support frame, increasing the contact area and support stability between the support frame and the support structure.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rail welding auxiliary support docking device, comprising a base (10), characterized in that, The base (10) has a support frame (20) on its top surface, and a support bracket (30) is provided on the support frame (20). A guide shaft (40) protruding from the top surface of the support bracket (30) is provided inside the support bracket (30). The support bracket (30) is also provided with a height adjustment screw (50). There are two height adjustment screws (50), which are respectively set at both ends of the guide shaft (40). The height adjustment screw (50) extends downward through the support bracket (30) into the support frame (20). A nut seat (55) that matches the height adjustment screw (50) is provided inside the support frame (20). A support plate (52) that abuts against the bottom surface of the support bracket (30) is also provided on the height adjustment screw (50).

2. The rail welding auxiliary support and mating device according to claim 1, characterized in that, The two ends of the guide shaft (40) are connected to the support frame (30) through bearing seats (42).

3. The rail welding auxiliary support and mating device according to claim 1, characterized in that, The guide shaft (40) is provided with two limiting plates (41), and the distance between the two limiting plates (41) is greater than the width of the base of the rail.

4. A rail welding auxiliary support and mating device according to any one of claims 1 to 3, characterized in that, The top end of the height adjusting screw (50) is connected to an operating head (53).

5. The rail welding auxiliary support and mating device according to claim 4, characterized in that, The operating head (53) is a cylindrical structure.

6. The rail welding auxiliary support and mating device according to claim 4, characterized in that, An adjustment hole (531) is provided on the operating head (53).

7. A rail welding auxiliary support and mating device according to any one of claims 1 to 3, characterized in that, The support frame (30) has a through hole with a diameter larger than that of the height adjusting screw (50).

8. The rail welding auxiliary support and mating device according to claim 7, characterized in that, The height adjustment screw (50) is also provided with a support plate one (51), the support plate one (51) is located above the support frame (30), and the distance between the support plate one (51) and the support plate two (52) is greater than the height of the support frame (30).

9. A rail welding auxiliary support mating device according to any one of claims 1 to 3, characterized in that, The support frame (20) includes a horizontal plate (21) and a vertical plate (22), with one end of the horizontal plate (21) and one end of the vertical plate (22) being vertically connected; there are two support frames (20), and the two support frames (20) correspond to the two ends of the support frame (30) respectively.

Images