An adjustable hot rolling sizing mill frame and its usage method

Abstract

This application provides an adjustable hot rolling sizing mill frame, including a fixed platform. A drive groove and a moving groove are formed on the top wall of the fixed platform. Two sets of moving grooves are symmetrically arranged about the drive groove. A moving block is slidably connected to the top wall of the fixed platform via the moving groove. An angle adjustment component for adjusting the angle of a supporting component is connected to the side wall of the moving block. The angle adjustment component includes a first gear rotatably connected to the side wall of the moving block. Two sets of first gears are fixedly connected via a connecting rod. A servo motor is fixedly connected to one set of the moving block's side wall, and the output end of the servo motor is fixedly connected to the first gear. A stabilizing component for supporting the steel pipe is connected to the side wall of the fixed platform. The angle adjustment component allows for adjustment of the sizing mill height according to different usage conditions, while also improving the stability of the sizing mill, thereby improving production quality. The stabilizing component supports the steel pipe, facilitating improved production efficiency.

Description

Technical Field

[0001] This invention relates to the field of sizing mill technology, and more specifically, to an adjustable hot rolling sizing mill frame and its usage method. Background Technology

[0002] The sizing mill takes steel pipes rolled by the Pilger mill, reheats them in a walking beam furnace, and then sizing them to obtain high-precision dimensions. The sizing roll profile can be adjusted individually or both rolls can be adjusted simultaneously. The sizing roll is the main tool for sizing. It is supported and rotated by bearings in the sizing roll box and ensures the correct position of the sizing roll in the frame. However, existing sizing mills are generally fixed at the bottom during use, which limits their application scenarios. Therefore, a sizing mill frame is needed.

[0003] A search revealed a Chinese patent application with patent number 202122891393.8, which discloses an installation mechanism for a sizing machine frame, relating to the field of sizing machine technology. The mechanism includes a sizing machine body and a support base plate. A rotating shaft assembly is provided at the bottom of the sizing machine body. Four rotating shaft assemblies are provided, with two of each of the four rotating shaft assemblies located at the bottom of the sizing machine body near the front and rear surface edges. A movable connecting rod is connected to the bottom of each of the four rotating shaft assemblies.

[0004] The above-mentioned patent has the following shortcomings: 1. When the height of the sizing machine is adjusted by the rotating shaft assembly on the movable connecting rod, the limited deflection range of the rotating shaft assembly restricts the adjustment of the sizing machine height, making it difficult to adapt to more application scenarios and resulting in poor applicability; 2. During the steel pipe production process, when the steel pipe needs to be sized by the sizing machine, it is not easy to provide effective support for the steel pipe, which may cause the steel pipe to shake or vibrate when passing through the sizing machine, resulting in equipment damage and reduced production efficiency.

[0005] Therefore, there is an urgent need for an adjustable hot rolling sizing mill stand to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the existing problems where, when adjusting the height of a sizing machine via a rotating shaft assembly on a movable connecting rod, the limited deflection range of the rotating shaft assembly restricts the height adjustment, making it unsuitable for various applications and resulting in poor applicability. Furthermore, during steel pipe production, when the steel pipe needs to be sized to its final dimensions using a sizing machine, it is difficult to provide effective support, leading to equipment damage due to shaking or vibration as the pipe passes through the machine, and also reducing production efficiency.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0008] An adjustable hot rolling sizing mill stand is provided to improve the above-mentioned problems.

[0009] The application is as follows:

[0010] An adjustable hot rolling sizing mill frame includes a fixed platform. The top wall of the fixed platform has a drive groove and a moving groove. Two sets of moving grooves are symmetrically arranged about the drive groove. Moving blocks are slidably connected to the top wall of the fixed platform via the moving grooves. A set of supporting components for supporting the sizing mill is rotatably connected to the top walls of the two sets of moving blocks. An angle adjusting component for adjusting the angle of the supporting components is connected to the side wall of the moving blocks. The angle adjusting component includes a first gear rotatably connected to the side wall of the moving blocks. Two sets of first gears are fixedly connected via a connecting rod. A servo motor is fixedly connected to the side wall of one set of moving blocks. The output end of the servo motor is fixedly connected to the first gear. A stabilizing component for supporting steel pipes is connected to the side wall of the fixed platform.

[0011] As a preferred technical solution of this application, the lifting component includes a deflection bracket rotatably connected to the side wall of the moving block, a second gear fixedly connected to the side wall of the deflection bracket, the first gear meshing with the second gear, a support frame rotatably connected to the side wall of the deflection bracket, and a fixing component for improving the stability of the sizing machine during use slidably connected to the inner wall of the support frame.

[0012] As a preferred technical solution of this application, the stabilizing component includes an adjusting plate fixedly connected to the side wall of the fixed platform. Two sets of adjusting plates are symmetrically arranged about the central axis of the fixed platform. A limit frame is fixedly connected to the top wall of the adjusting plate, and an adjusting screw is rotatably connected to the bottom wall of the limit frame.

[0013] As a preferred technical solution of this application, the side wall of the limiting frame is provided with a limiting groove, the outer wall of the adjusting screw is threaded with a moving ring, the moving ring is limited by the limiting groove, and the outer wall of the moving ring is fixedly connected with an arc-shaped frame.

[0014] As a preferred technical solution of this application, the end of the adjusting screw that passes through the adjusting plate is also fixedly connected to a first bevel gear, the bottom wall of the fixed platform is rotatably connected to a conveying rod, and the outer wall of the conveying rod is fixedly connected to a second bevel gear, with the first bevel gear and the second bevel gear meshing together.

[0015] As a preferred technical solution of this application, the fixing component includes a limiting plate slidably connected to the bottom wall of the support frame. Two sets of limiting plates are symmetrically arranged about the central axis of the support frame. A stop plate is rotatably connected to the side wall of the limiting plate. A reset plate is fixedly connected to the bottom wall of the support frame. A tension spring is fixedly connected to the side wall of the reset plate. The end of the tension spring away from the reset plate is also fixedly connected to the limiting plate.

[0016] As a preferred technical solution of this application, the inner wall of the support frame is threaded with fixing bolts, and two sets of fixing bolts are symmetrically arranged about the central axis of the support frame. The fixing bolts cooperate with the deflection bracket.

[0017] As a preferred technical solution of this application, the driving groove is symmetrically arranged in two sets about the central axis of the fixed platform, and a set of bidirectional screws is rotatably connected to the sidewalls of the two sets of driving grooves.

[0018] As a preferred technical solution of this application, a drive plate is fixedly connected to the side wall of the deflection bracket, and the drive plate is threadedly connected to a bidirectional screw.

[0019] This invention also discloses a method for using an adjustable hot rolling sizing mill stand, specifically including the following steps:

[0020] S1: Start the bidirectional screw and simultaneously drive the deflection brackets on both sides to move through the drive plate. The deflection brackets drive the moving block to move towards the center of the fixed table through the moving slot. This adjusts the distance between the support brackets according to the size of the sizing machine. Then, place the sizing machine on the two sets of support brackets.

[0021] S2: Simultaneously pull the baffles on both sides to a position parallel to the side of the sizing machine. By rotating the baffles to contact the sizing machine, and then releasing the baffles, the baffles are pressed against the sizing machine by the limit plate under the action of the tension spring, thereby fixing the sizing machine and improving the stability of the sizing machine during use.

[0022] S3: When the height of the sizing machine needs to be adjusted, first loosen the fixing bolt to allow the support frame to rotate. Then, start the servo motor to drive the first gear to rotate through the connecting rod. The first gear drives the second gear to rotate. Under the action of the second gear, the angle of the deflection bracket is deflected. When the deflection bracket deflects, since the support frame can rotate, it does not affect the contact between the support frame and the sizing machine, thereby adjusting the sizing machine to a suitable height. After the adjustment is completed, tighten the fixing bolt to fix the support frame.

[0023] S4: Then, the rotating conveyor rod drives the first bevel gear to rotate through the second bevel gear, which in turn drives the adjusting screw to rotate. When the adjusting screw rotates, it causes the moving ring to move upward under the action of the limiting groove, thereby moving the arc frame to a position parallel to the output port of the sizing machine, thus supporting the steel pipe and improving work efficiency.

[0024] In the scheme of this application:

[0025] 1. By starting the servo motor, the deflection bracket is driven to rotate, thereby adjusting the tilt state of the deflection bracket. At the same time, the servo motor has a self-locking function, which allows the height of the sizing machine to be adjusted according to different usage needs, making it more convenient to use. This solves the problem in the prior art that when the height of the sizing machine is adjusted through the rotating shaft assembly on the movable connecting rod, the deflection range of the rotating shaft assembly is limited, which restricts the adjustment of the height of the sizing machine, making it unsuitable for more usage scenarios and resulting in poor applicability.

[0026] 2. The conveyor rod drives the second bevel gear to rotate. The interaction between the second and first bevel gears causes the adjusting screw to rotate, thereby adjusting the height of the arc plate. The arc plate supports the steel pipe, which improves work efficiency. This solves the problem in the existing technology where, during the steel pipe production process, when the steel pipe needs to be sized for final dimensions by a sizing machine, it is difficult to effectively support the steel pipe, causing it to shake or vibrate as it passes through the sizing machine, resulting in equipment damage and reduced production efficiency. Attached Figure Description

[0027] Figure 1 This is one of the overall structural diagrams of this application;

[0028] Figure 2 This is the second schematic diagram of the overall structure of this application;

[0029] Figure 3 This is the third schematic diagram of the overall structure of this application;

[0030] Figure 4 This is the fourth schematic diagram of the overall structure of this application;

[0031] Figure 5 For this application Figure 1 Enlarged view of the A-structure;

[0032] Figure 6 For this application Figure 2 Enlarged view of the B-structure;

[0033] Figure 7 For this application Figure 3 Enlarged view of the C-structure.

[0034] The image shows:

[0035] 100. Fixed platform; 101. Drive slot; 102. Moving slot; 103. Moving block; 104. First gear; 105. Connecting rod; 106. Servo motor; 110. Deflection bracket; 111. Second gear; 112. Support frame; 120. Adjusting plate; 121. Limiting frame; 122. Adjusting screw; 123. Limiting slot; 124. Moving ring; 125. Arc frame; 126. First bevel gear; 127. Conveying rod; 128. Second bevel gear; 130. Limiting plate; 131. Baffle plate; 132. Reset plate; 133. Tension spring; 140. Fixing bolt; 141. Bidirectional screw; 142. Drive plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0039] 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.

[0040] In the description of this invention, it should be noted that the terms "upper," "lower," 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 steel pipe of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention 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 of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] like Figure 1-6As shown, this embodiment proposes an adjustable hot rolling sizing mill frame, including a fixed platform 100. The top wall of the fixed platform 100 has a drive groove 101 and a moving groove 102. Two sets of moving grooves 102 are symmetrically arranged about the drive groove 101. Moving blocks 103 are slidably connected to the top wall of the fixed platform 100 via the moving grooves 102. A set of supporting components for supporting the sizing mill is rotatably connected to the top walls of the two sets of moving blocks 103. An angle adjustment mechanism for adjusting the angle of the supporting components is connected to the side wall of the moving blocks 103. The angle adjustment component includes a first gear 104 rotatably connected to the side wall of the moving block 103. Two sets of first gears 104 are fixedly connected by a connecting rod 105. A servo motor 106 is fixedly connected to the side wall of one set of moving blocks 103. The output end of the servo motor 106 is fixedly connected to the first gear 104. A stabilizing component for supporting the steel pipe is connected to the side wall of the fixed platform 100. The angle of the deflection bracket 110 can be adjusted by the action of the servo motor 106, thereby adapting to different application environments.

[0042] like Figure 1-7 As shown, in a preferred embodiment, based on the above method, the supporting component further includes a deflection bracket 110 rotatably connected to the side wall of the moving block 103. A second gear 111 is fixedly connected to the side wall of the deflection bracket 110. The first gear 104 is meshed with the second gear 111. A support frame 112 is rotatably connected to the side wall of the deflection bracket 110. A fixing component for improving the stability of the sizing machine during use is slidably connected to the inner wall of the support frame 112. The support frame 112 can be deflected, thereby better fitting with the sizing machine and improving the stability of the sizing machine during use.

[0043] like Figure 1-6 As shown, in a preferred embodiment, based on the above method, the stabilizing component further includes an adjusting plate 120 fixedly connected to the side wall of the fixed platform 100. Two sets of adjusting plates 120 are symmetrically arranged about the central axis of the fixed platform 100. A limit frame 121 is fixedly connected to the top wall of the adjusting plate 120, and an adjusting screw 122 is rotatably connected to the bottom wall of the limit frame 121. The adjusting screw 122 can better cooperate with the sizing machine and make it more convenient to use.

[0044] like Figure 1-6 As shown, in a preferred embodiment, based on the above method, a limiting groove 123 is further provided on the side wall of the limiting frame 121, and a moving ring 124 is threadedly connected to the outer wall of the adjusting screw 122. The moving ring 124 is limited by the limiting groove 123, and an arc-shaped frame 125 is fixedly connected to the outer wall of the moving ring 124. The moving ring 124 can slide upward under the action of the limiting groove 123, thereby adjusting the height of the arc-shaped frame 125, which is beneficial to improving the convenience of use.

[0045] like Figure 1-7 As shown, in a preferred embodiment, based on the above method, a first bevel gear 126 is fixedly connected to one end of the adjusting screw 122 that passes through the adjusting plate 120. A conveying rod 127 is rotatably connected to the bottom wall of the fixed platform 100. A second bevel gear 128 is fixedly connected to the outer wall of the conveying rod 127. The first bevel gear 126 and the second bevel gear 128 are meshed and connected. The conveying rod 127 can synchronously drive the second bevel gears 128 on both sides to rotate, thereby improving the synchronization.

[0046] like Figure 1-3 As shown, in a preferred embodiment, based on the above method, the fixing component further includes a limiting plate 130 slidably connected to the bottom wall of the support frame 112. Two sets of limiting plates 130 are symmetrically arranged about the central axis of the support frame 112. A stop plate 131 is rotatably connected to the side wall of the limiting plate 130. A reset plate 132 is fixedly connected to the bottom wall of the support frame 112. A tension spring 133 is fixedly connected to the side wall of the reset plate 132. The end of the tension spring 133 away from the reset plate 132 is also fixedly connected to the limiting plate 130. Under the action of the tension spring 133, the limiting plate 130 can be driven to reset, thereby realizing that the stop plate 131 fits with the sizing machine, making the sizing machine more secure after installation.

[0047] like Figure 1-7 As shown, in a preferred embodiment, based on the above method, the inner wall of the support frame 112 is further connected with a fixing bolt 140. Two sets of fixing bolts 140 are symmetrically arranged about the central axis of the support frame 112. The fixing bolts 140 cooperate with the deflection bracket 110. The fixing bolts 140 can limit the position of the support frame 112, which is convenient to adjust the angle of the support frame 112 according to different usage needs, and achieves better fit with the sizing machine.

[0048] like Figure 1-2 As shown, in a preferred embodiment, based on the above method, two sets of drive slots 101 are symmetrically arranged about the central axis of the fixed platform 100. A set of bidirectional screws 141 are rotatably connected to the side walls of the two sets of drive slots 101. The drive motor is built into the bidirectional screws 141, which facilitates the improvement of automation efficiency.

[0049] like Figure 1-3 As shown, in a preferred embodiment, based on the above method, a drive plate 142 is fixedly connected to the side wall of the deflection bracket 110. The drive plate 142 is threadedly connected to the bidirectional screw 141. When the bidirectional screw 141 rotates, it can drive the drive plate 142 to move, thereby facilitating the deflection bracket 110 to move synchronously or in the opposite direction at the same time.

[0050] Specifically, in use, the adjustable hot rolling sizing mill frame works as follows: The bidirectional screw 141 is activated, simultaneously driving the deflection brackets 110 on both sides via the drive plate 142. The deflection brackets 110 then drive the moving blocks 103 to move towards the center of the fixed platform 100 via the moving groove 102. This adjusts the distance between the support brackets 112 according to the size of the sizing mill. The sizing mill is then placed on the two sets of support brackets 112, and simultaneously the abutment plates 131 on both sides are pulled to adjust the abutment... Plate 131 is pulled to a position parallel to the side of the sizing machine. By rotating the stop plate 131, it comes into contact with the sizing machine. Then, the stop plate 131 is released. Under the action of the tension spring 133, the stop plate 131 is pushed against the sizing machine by the limiting plate 130, thereby fixing the sizing machine and improving its stability during use. When it is necessary to adjust the height of the sizing machine, first loosen the fixing bolt 140 so that the support frame 112 can rotate, and then start the servo motor 1. 06 The connecting rod 105 simultaneously drives the first gear 104 to rotate, which in turn drives the second gear 111 to rotate. Under the action of the second gear 111, the angle of the deflection bracket 110 is deflected. When the deflection bracket 110 deflects, since the support frame 112 can rotate, it does not affect the contact between the support frame 112 and the sizing machine, thus adjusting the sizing machine to a suitable height. After the adjustment is completed, the support frame 112 is fixed by tightening the fixing bolt 140. Then, the rotating conveying rod 127 drives the first bevel gear 126 to rotate through the second bevel gear 128. The first bevel gear 126 drives the adjusting screw 122 to rotate. When the adjusting screw 122 rotates, it drives the moving ring 124 to move upward under the action of the limiting groove 123, thereby moving the arc frame 125 to a position parallel to the output port of the sizing machine, thus supporting the steel pipe and improving work efficiency.

[0051] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. An adjustable hot rolling sizing mill frame, comprising a fixed platform (100), characterized in that, The top wall of the fixed platform (100) is provided with a drive groove (101) and a moving groove (102). Two sets of drive grooves (101) are symmetrically arranged about the central axis of the fixed platform (100). Two sets of moving grooves (102) are symmetrically arranged about each set of drive grooves (101). Moving blocks (103) are slidably connected to the top wall of the fixed platform (100) via the moving grooves (102). The top walls of the two sets of moving blocks (103) are rotatably connected to the same set of supporting components for supporting the sizing machine. The side wall of the moving block (103) is connected to an angle adjustment component for adjusting the angle of the supporting component. The angle adjustment component includes a first gear (104) rotatably connected to the side wall of the moving block (103). Two sets of the first gears (104) are fixedly connected by a connecting rod (105). One set of the side wall of the moving block (103) is fixedly connected to a servo motor (106). The output end of the servo motor (106) is fixedly connected to the first gear (104). The side wall of the fixed platform (100) is connected to a stabilizing component for supporting the steel pipe. The lifting component includes a deflection bracket (110) rotatably connected to the side wall of the moving block (103). A second gear (111) is fixedly connected to the side wall of the deflection bracket (110). The first gear (104) meshes with the second gear (111). A support frame (112) is rotatably connected to the side wall of the deflection bracket (110). A fixing component for improving the stability of the sizing machine during use is slidably connected to the bottom wall of the support frame (112). The fixing assembly includes a limiting plate (130) slidably connected to the bottom wall of the support frame (112). Two sets of limiting plates (130) are symmetrically arranged about the central axis of the support frame (112). A stop plate (131) is rotatably connected to the side wall of the limiting plate (130). A reset plate (132) is fixedly connected to the bottom wall of the support frame (112). A tension spring (133) is fixedly connected to the side wall of the reset plate (132). The end away from the reset plate (132) is also fixedly connected to the limiting plate (130). A set of bidirectional screws (141) are rotatably connected to the side walls of the two sets of drive slots (101). A drive plate (142) is fixedly connected to the side wall of the deflection bracket (110). The drive plate (142) is threadedly connected to the bidirectional screws (141). When the bidirectional screws (141) are started, the deflection brackets (110) on both sides are moved through the drive plate (142).

2. The adjustable hot rolling sizing mill frame according to claim 1, characterized in that, The stabilizing component includes an adjusting plate (120) fixedly connected to the side wall of the fixed platform (100). Two sets of adjusting plates (120) are symmetrically arranged about another central axis of the fixed platform (100). A limiting frame (121) is fixedly connected to the top wall of the adjusting plate (120), and an adjusting screw (122) is rotatably connected to the bottom wall of the limiting frame (121). A limiting groove (123) is opened on the side wall of the limiting frame (121). A moving ring (124) is threadedly connected to the outer wall of the adjusting screw (122). The moving ring (124) is limited by the limiting groove (123). An arc-shaped frame (125) is fixedly connected to the outer wall of the moving ring (124).

3. The adjustable hot rolling sizing mill frame according to claim 2, characterized in that, The adjusting screw (122) is fixedly connected to a first bevel gear (126) at one end passing through the adjusting plate (120). The bottom wall of the fixed platform (100) is rotatably connected to a conveying rod (127). The outer wall of the conveying rod (127) is fixedly connected to a second bevel gear (128). The first bevel gear (126) and the second bevel gear (128) are meshed and connected. Rotating the conveying rod (127) can drive the first bevel gear (126) to rotate through the second bevel gear (128).

4. The adjustable hot rolling sizing mill frame according to claim 1, characterized in that, The inner wall of the support frame (112) is threaded with a fixing bolt (140). Two sets of fixing bolts (140) are symmetrically arranged about the central axis of the support frame (112). The fixing bolts (140) cooperate with the deflection bracket (110) and the support frame (112) can be limited by the fixing bolts (140).

5. A method of using an adjustable hot rolling sizing mill stand, comprising using an adjustable hot rolling sizing mill stand as described in claim 1, characterized in that, Specifically, the following steps are included: S1: Start the bidirectional screw (141) and simultaneously drive the deflection brackets (110) on both sides to move through the drive plate (142). The deflection brackets (110) drive the moving block (103) to move towards the middle of the fixed table (100), thereby adjusting the distance between the support brackets (112) according to the size of the sizing machine. Then place the sizing machine on the two sets of support brackets (112). S2: Simultaneously pull the baffles (131) on both sides to move the baffles (131) to a position parallel to the side of the sizing machine. By rotating the baffles (131) to contact the sizing machine, and then releasing the baffles (131), the baffles (131) are pushed against the sizing machine by the limit plate (130) under the action of the tension spring (133), thereby fixing the sizing machine and improving the stability of the sizing machine during use. S3: When the height of the sizing machine needs to be adjusted, first loosen the fixing bolt (140) so that the support frame (112) can rotate. Then start the servo motor (106) and drive the first gear (104) to rotate through the connecting rod (105). The first gear (104) drives the second gear (111) to rotate. Under the action of the second gear (111), the angle of the deflection bracket (110) is deflected. When the deflection bracket (110) deflects, since the support frame (112) can rotate, it does not affect the contact between the support frame (112) and the sizing machine, thereby adjusting the sizing machine to a suitable height. After the adjustment is completed, the support frame (112) is fixed by tightening the fixing bolt (140). S4: Then, rotating the conveyor rod (127) can drive the first bevel gear (126) to rotate through the second bevel gear (128). The first bevel gear (126) drives the adjusting screw (122) to rotate. When the adjusting screw (122) rotates, it drives the moving ring (124) to move upward under the action of the limiting groove (123), thereby driving the arc frame (125) to move to a position parallel to the output port of the sizing machine, thus achieving support for the steel pipe and improving work efficiency.

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