Large-diameter pipe welding set-up fixing device

Abstract

This utility model relates to the field of pipe welding, specifically a large-diameter pipe welding assembly and fixing device. It includes a base plate with two sliding plates slidably connected to its top. Each sliding plate has a hydraulic cylinder fixedly connected to its top, and a mounting bracket is fixedly connected to one end of each hydraulic cylinder. Each mounting bracket has a fixing mechanism on one side, including a fixing rod, one end of which is fixedly connected to one side of the mounting bracket. This utility model allows for convenient and rapid accurate and effective clamping of pipes of different diameters by activating a first servo motor. Because there are two identical fixing mechanisms, the pipes fixed by the two mechanisms can be kept as coaxial as possible. Furthermore, the height of the two mounting brackets can be adjusted using an infrared receiver and an infrared transmitter, further increasing the accuracy and convenience when aligning the two pipes.

Description

Technical Field

[0001] This utility model relates to the field of pipeline welding, specifically a large-diameter pipeline welding assembly and fixing device. Background Technology

[0002] Large-diameter pipe welding refers to the process of connecting pipes with larger diameters to the required length or structure through welding technology. Its core is to melt and fuse the metal at the pipe joint through local heating or pressurization to form a permanent connection. Large-diameter pipe welding is for metal pipes with larger diameters and uses welding methods such as electric arc welding, gas shielded welding, and submerged arc welding to fuse the ends of the pipe sections to form a continuous and sealed connection.

[0003] In existing technologies, when welding large-diameter pipes, it is often necessary to align and fix one end of the two pipes to facilitate subsequent welding and ensure smooth welding. Generally, a double-acting screw or similar drive device is used to move two ring blocks closer together to clamp the pipes. After clamping and fixing, the pipes are tapped or moved further depending on the clamping effect and position to adjust the distance between the central axes of the two pipes. Although clamping and fixing the pipes with the ring blocks can achieve pipe fixation and clamping, when clamping and fixing pipes of different diameters, workers need to replace and adjust the ring blocks used to clamp the pipes. This undoubtedly increases the workload and tediousness of the workers when welding pipes. Furthermore, after completing the basic fixation and clamping of the pipes, repeated tapping and adjusting of jacks are required to adjust the central axes of the two pipes, which not only reduces the efficiency of pipe welding but also increases the fatigue and workload of the workers. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, when clamping and fixing pipes of different diameters, workers need to replace and adjust the rings used to clamp the pipes. This undoubtedly increases the workload and complexity of the workers when welding pipes. Furthermore, after completing the basic fixing and clamping of the pipes, it is necessary to repeatedly tap and adjust the jacks to adjust the central axis of the two pipes. This not only reduces the efficiency of pipe welding but also increases the fatigue and workload of the workers. This utility model proposes a large-diameter pipe welding assembly fixing device.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a large-diameter pipe welding assembly fixing device, including a base plate, a sliding plate slidably connected to the top of the base plate, two sliding plates are provided, a hydraulic cylinder is fixedly connected to the top of each of the two sliding plates, a mounting frame is fixedly connected to one end of each of the two hydraulic cylinders, and a fixing mechanism is provided on one side of each of the two mounting frames. The fixing mechanism includes a fixing rod, one end of which is fixedly connected to one side of the mounting frame. A rotating block is rotatably connected to the surface of the fixing rod, and a sliding hollow block is slidably connected to the surface of the rotating block. Mounting rods are fixedly connected to both sides of the sliding hollow block. A ring frame is rotatably connected to the surfaces of the two mounting rods. A connecting rod is fixedly connected to the inner cavity of the rotating block, and a fixing block is rotatably connected to the surface of the connecting rod. A driving assembly is provided on the surface of the ring frame.

[0006] Preferably, the drive assembly includes a first mounting block, one side of which is fixedly connected to the surface of the ring frame. A rotating rod is rotatably connected to the inner cavity of the first mounting block, and a connecting block is fixedly connected to one end of the rotating rod. A fixing post is fixedly connected to one side of the mounting frame, and a second mounting block is rotatably connected to one end of the fixing post. A one-way threaded rod is rotatably connected to one side of the second mounting block, and the surface of the one-way threaded rod is threadedly connected to the inner cavity of the connecting block. A first servo motor is fixedly connected to one side of the second mounting block, and the output end of the first servo motor passes through the second mounting block and is fixedly connected to one end of the one-way threaded rod.

[0007] Preferably, threaded blocks are fixedly connected to the bottom of both slide plates, and a bidirectional screw is rotatably connected to the inner cavity of the base plate. The inner cavities of both threaded blocks are threadedly connected to the surface of the bidirectional screw. An inverted L-shaped plate is fixedly connected to one side of the base plate, and a second servo motor is fixedly connected to one side of the inverted L-shaped plate. The output end of the second servo motor passes through one side of the inverted L-shaped plate and is fixedly connected to an extension rod. One end of the extension rod passes through one side of the base plate and is fixedly connected to one side of the arc-shaped block.

[0008] Preferably, an infrared receiver is fixedly connected to the top of one of the mounting brackets, an infrared transmitter is fixedly connected to the top of the other mounting bracket, and two cylinders are fixedly connected to the top of the base plate, with arc-shaped blocks fixedly connected to the output ends of both cylinders.

[0009] Preferably, a hollow ring block is fixedly connected to one side of the mounting bracket, and an arc-shaped slider is fixedly connected to one side of the ring bracket, with the surface of the arc-shaped slider slidably connected to the inner cavity of the hollow ring block.

[0010] Preferably, a reinforcing block is fixedly connected to one side of the mounting bracket, and a reinforcing groove is provided at one end of the fixing column. The surface of the reinforcing block is fixedly connected to the inner cavity of the reinforcing groove.

[0011] Preferably, a hollow sleeve and a reinforcing block are fixedly connected to the top of each of the two slide plates, and a sliding rod is fixedly connected to the bottom of each of the two mounting brackets. The surface of the sliding rod is slidably connected to the inner cavity of the hollow sleeve, and the inner cavity of the reinforcing block is fixedly connected to the surface of the hydraulic cylinder.

[0012] The advantages of this utility model are: This invention utilizes a first servo motor to drive a unidirectional threaded rod to rotate, which in turn causes the connecting block to rotate the annular frame. Simultaneously, a mounting rod and a sliding hollow block push a rotating block to rotate around the center of the fixed rod, thereby clamping the pipe placed inside the annular frame. By activating the first servo motor, accurate and effective clamping of pipes of different diameters can be achieved conveniently and quickly. Furthermore, because there are two identical fixing mechanisms, the pipes fixed by the two mechanisms can maintain coaxiality as much as possible. Additionally, an infrared receiver and an infrared transmitter can be used to further enhance the clamping capability. The coordination of the two mounting brackets allows for height adjustment, further increasing the accuracy and convenience of aligning the two pipes. This solves the problem of workers needing to replace and adjust the clamping rings when clamping and fixing pipes of different diameters, which undoubtedly increases the workload and tediousness of pipe welding. Furthermore, after completing the basic fixing and clamping of the pipes, it is necessary to repeatedly tap and adjust the jacks to adjust the central axis of the two pipes, which not only reduces the efficiency of pipe welding but also increases the fatigue and workload of the workers. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the base plate and the bidirectional screw of this utility model; Figure 3 This is a schematic diagram of the structure of the threaded block and hollow sleeve of this utility model; Figure 4This is a schematic diagram of the infrared emitter and rotating block of this utility model; Figure 5 This is a schematic diagram of the structure of the fixing rod and hollow ring block of this utility model; Figure 6 This is a schematic diagram of the arc-shaped slider and reinforcing block of this utility model; Figure 7 This is a schematic diagram of the extension rod and arc-shaped block of this utility model.

[0015] In the diagram: 1. Base plate; 2. Slide plate; 3. Hydraulic cylinder; 4. Mounting bracket; 5. Fixing mechanism; 501. Fixing rod; 502. Rotating block; 503. Sliding hollow block; 504. Mounting rod; 505. Ring frame; 506. Connecting rod; 507. Fixing block; 508. Drive assembly; 5081. First mounting block; 5082. Rotating rod; 5083. Connecting block; 5084. Fixing column; 5085. Second... Mounting block; 5086, First servo motor; 5087, One-way threaded rod; 6, Reinforcing block; 7, Hollow sleeve; 8, Slide rod; 9, Infrared receiver; 10, Infrared transmitter; 11, Cylinder; 12, Arc-shaped block; 13, Two-way screw; 14, Threaded block; 15, Inverted L-shaped plate; 16, Second servo motor; 17, Hollow ring block; 18, Arc-shaped slider; 19, Reinforcing block; 20, Reinforcing groove; 21, Extension rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0017] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail. This application discloses a fixing device for welding large-diameter pipes. (Refer to...) Figure 1 and Figure 4 A large-diameter pipe welding assembly fixing device includes a base plate 1, a sliding plate 2 slidably connected to the top of the base plate 1, two sliding plates 2 are provided, a hydraulic cylinder 3 is fixedly connected to the top of each of the two sliding plates 2, a mounting bracket 4 is fixedly connected to one end of each of the two hydraulic cylinders 3, and a fixing mechanism 5 is provided on one side of each of the two mounting brackets 4. The fixing mechanism 5 includes a fixing rod 501. One end of the fixing rod 501 is fixedly connected to one side of the mounting frame 4. A rotating block 502 is rotatably connected to the surface of the fixing rod 501. A sliding hollow block 503 is slidably connected to the surface of the rotating block 502. Mounting rods 504 are fixedly connected to both sides of the sliding hollow block 503. A ring frame 505 is rotatably connected to the surfaces of the two mounting rods 504. A connecting rod 506 is fixedly connected to the inner cavity of the rotating block 502. A fixing block 507 is rotatably connected to the surface of the connecting rod 506. A driving assembly 508 is provided on the surface of the ring frame 505.

[0018] The base plate 1 can be connected to the hydraulic cylinder 3 via the sliding plate 2. The hydraulic cylinder 3 not only installs the mounting frame 4, but also moves the mounting frame 4 up and down through its own operation. There are two sets of the sliding plate 2, hydraulic cylinder 3, mounting frame 4, and fixing mechanism 5, and the two fixing mechanisms 5 have identical structures. Therefore, the working principle of the two fixing mechanisms 5 will not be elaborated here. The fixing rod 501 installed on one side of the mounting frame 4 can be connected to the sliding hollow block 503 via the rotating block 502. The mounting rods 504 connected to both sides of the sliding hollow block 503 can install and connect the ring frame 505. When the ring frame 505 rotates, it can smoothly drive the rotating block 502 to rotate around the center of the fixed rod 501 through the connection between the mounting rod 504 and the sliding hollow block 503, as well as the sliding connection between the sliding hollow block 503 and the rotating block 502. This allows the rotating block 502 to move towards or away from the center of the ring frame 505. The fixed block 507, which is connected to the rotating block 502 through the connecting rod 506, can rotate with the rotating block 502 and clamp and fix the pipe passing through the ring frame 505 after rotating to a certain angle.

[0019] Reference Figure 5 and Figure 6The drive assembly 508 includes a first mounting block 5081, one side of which is fixedly connected to the surface of the ring frame 505. A rotating rod 5082 is rotatably connected to the inner cavity of the first mounting block 5081. One end of the rotating rod 5082 is fixedly connected to a connecting block 5083. A fixing post 5084 is fixedly connected to one side of the mounting frame 4. One end of the fixing post 5084 is rotatably connected to a second mounting block 5085. A one-way threaded rod 5087 is rotatably connected to one side of the second mounting block 5085. The surface of the one-way threaded rod 5087 is threadedly connected to the inner cavity of the connecting block 5083. A first servo motor 5086 is fixedly connected to one side of the second mounting block 5085. The output end of the first servo motor 5086 passes through the second mounting block 5085 and is fixedly connected to one end of the one-way threaded rod 5087. The ring frame 505 can use the first mounting block 5081 to control the rotating rod 5082 and the connecting block. 5083 is connected, and the fixed column 5084 installed on one side of the mounting bracket 4 is mainly used to install the one-way threaded rod 5087 through the second mounting block 5085. When the one-way threaded rod 5087 rotates, it can drive the connecting block 5083 to move by using the threaded connection between itself and the connecting block 5083. Since the fixed column 5084 and the second mounting block 5085 are rotatably connected, and the rotating rod 5082 and the first mounting block 5081 are also rotatably connected, the connecting block 5083 can smoothly drive the ring frame 505 to rotate when it moves, and its own threaded movement is not easily affected, thereby realizing the rotation of the ring frame 505. At the same time, the first servo motor 5086 on the side of the second mounting block 5085 can be used to drive the one-way threaded rod 5087 to rotate, thereby increasing the convenience when the one-way threaded rod 5087 needs to be rotated.

[0020] Reference Figure 2 , Figure 3 and Figure 7Both slide plates 2 have threaded blocks 14 fixedly connected to their bottoms. A bidirectional screw 13 is rotatably connected to the inner cavity of the base plate 1. The inner cavities of both threaded blocks 14 are threadedly connected to the surfaces of the bidirectional screw 13. An inverted L-shaped plate 15 is fixedly connected to one side of the base plate 1. A second servo motor 16 is fixedly connected to one side of the inverted L-shaped plate 15. The output end of the second servo motor 16 passes through one side of the inverted L-shaped plate 15 and is fixedly connected to an extension rod 21. One end of the extension rod 21 passes through one side of the base plate 1 and is fixedly connected to one side of the arc-shaped block 12. The base plate 1 can connect to the bidirectional screw 13, while the surfaces of both threaded blocks 14 are slidably connected to the inner cavity of the base plate 1. Furthermore, the threads on both sides of the bidirectional screw 13 are opposite, which allows the bidirectional screw to... When rod 13 rotates, it can smoothly drive the two slide plates 2 to move and drive the two mounting brackets 4 to move in opposite directions. This allows the two fixing mechanisms 5 to smoothly move the two pipes when clamping them, aligning one end of the two pipes for easier subsequent welding. The base plate 1 can also be connected to the second servo motor 16 via the inverted L-shaped plate 15. The second servo motor 16 can smoothly drive the bidirectional screw 13 to rotate during operation through its connection with the extension rod 21 and the connection between the extension rod 21 and the bidirectional screw 13, thus increasing the convenience of rotating the bidirectional screw 13.

[0021] Reference Figure 1 and Figure 2One mounting bracket 4 has an infrared receiver 9 fixedly connected to its top, and the other mounting bracket 4 has an infrared transmitter 10 fixedly connected to its top. Two cylinders 11 are fixedly connected to the top of the base plate 1, and arc-shaped blocks 12 are fixedly connected to the output ends of both cylinders 11. The infrared transmitter 10 emits infrared rays, while the infrared receiver 9 receives infrared rays. Because the two fixing mechanisms 5 have the same structure, the centers of the two ring brackets 505 are on the same central axis. The different heights of the two mounting brackets 4 will affect the position of the centers of the two pipes during welding. The placement of the infrared receiver 9 and the infrared transmitter 10 allows workers to easily observe and judge whether the two mounting brackets 4 are at the same height. The infrared transmitter 10 uses current to drive an internal light-emitting element, converting electrical energy into invisible infrared light signals and emitting them directionally. The infrared receiver 9 uses special photosensitive materials to receive infrared rays of a specific wavelength. Infrared light is highly sensitive and can accurately capture the light signal emitted by the transmitter and convert it into an electrical signal output. The two are often used together. The transmitter is responsible for transmitting information, and the receiver is responsible for receiving and converting the signal. Both the infrared receiver 9 and the infrared transmitter 10 are existing technologies in daily life, so the specific working principle will not be elaborated here. At the same time, different models of infrared receiver 9 and infrared transmitter 10 can be selected according to the actual situation. For example, infrared receiver 9 can be selected as OV7670, and infrared transmitter 10 can be selected as IR333-A. Cylinder 11 can be connected to the arc block 12 and drive the arc block 12 to move up and down through its own operation. When the pipeline is fixed by the fixing mechanism 5, the operator can raise the arc block 12 through the operation of cylinder 11 so that its interior contacts the surface of the pipeline, thereby providing a certain support for the pipeline and increasing the stability of the pipeline during welding.

[0022] Reference Figure 5 and Figure 6 A hollow ring block 17 is fixedly connected to one side of the mounting bracket 4, and an arc-shaped slider 18 is fixedly connected to one side of the ring frame 505. The surface of the arc-shaped slider 18 is slidably connected to the inner cavity of the hollow ring block 17. The mounting bracket 4 can limit the arc-shaped slider 18 through the hollow ring block 17. Since the arc-shaped slider 18 is connected to the ring frame 505, the ring frame 505 will be limited by the hollow ring block 17 when it rotates, thereby effectively increasing the stability of the ring frame 505 when it rotates.

[0023] Reference Figure 5 and Figure 6A reinforcing block 19 is fixedly connected to one side of the mounting bracket 4, and a reinforcing groove 20 is provided at one end of the fixing column 5084. The surface of the reinforcing block 19 is fixedly connected to the inner cavity of the reinforcing groove 20. The mounting bracket 4 can effectively strengthen the connection between the fixing column 5084 and the mounting bracket 4 through the connection relationship between the reinforcing block 19 and the reinforcing groove 20, so that the fixing column 5084 can have higher firmness and stability when used, and the connection between itself and the mounting bracket 4 is not easy to loosen or shake during use.

[0024] Reference Figure 1 and Figure 3 Hollow sleeves 7 and reinforcing blocks 6 are fixedly connected to the top of both sliding plates 2, and sliding rods 8 are fixedly connected to the bottom of both mounting brackets 4. The surface of the sliding rods 8 is slidably connected to the inner cavity of the hollow sleeves 7, and the inner cavity of the reinforcing blocks 6 is fixedly connected to the surface of the hydraulic cylinder 3. The reinforcing blocks 6 can increase the stability of the connection between the sliding plates 2 and the hydraulic cylinder 3 by utilizing their connection with the sliding plates 2. The hollow sleeves 7 and sliding rods 8 make the mounting brackets 4 move more stably when moving up and down by the operation of the hydraulic cylinder 3, and it is not easy for them to shake or tilt during the up and down movement.

[0025] Working Principle: When using this device, the operator can pass the pipe to be welded through the inner side of the mounting frame 4 and the annular frame 505. Then, the first servo motor 5086 is started. The operation of the first servo motor 5086 will smoothly drive the one-way threaded rod 5087 to rotate. When the one-way threaded rod 5087 rotates, it can smoothly drive the connecting block 5083 to move. Through its connection with the rotating rod 5082 and the connection between the first mounting block 5081 and the annular frame 505, it drives the annular frame 505 to rotate. The rotation of the annular frame 505 can also drive the sliding hollow block 503 to slide on the surface of the rotating block 502 through its connection with the mounting rod 504. This drives the rotating block 502 to rotate around the center of the fixed rod 501, and then rotate and move towards the center of the annular frame 505. After the ring frame 505 rotates to a certain angle, it can clamp and fix the pipe. Then, the operator can start the second servo motor 16. The operation of the second servo motor 16 drives the extension rod 21 and the bidirectional screw 13 to rotate. Using the threaded connection between the bidirectional screw 13 and the two threaded blocks 14, the two mounting brackets 4 are moved closer to each other. When one end of the two pipes is in contact or about to contact, the operator can stop the operation of the second servo motor 16 and start the cylinder 11 so that the top of the arc block 12 contacts the surface of the pipe, thus supporting the pipe. When the heights of the two mounting brackets 4 are different, the heights of the two mounting brackets 4 can be adjusted by starting the hydraulic cylinder 3 and cooperating with the infrared receiver 9 and the infrared transmitter 10, so that the two mounting brackets 4 can be kept as horizontal as possible.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A large diameter pipe welding set-up fixing apparatus comprising a base plate (1), characterised in that: The top of the base plate (1) is slidably connected to a slide plate (2). There are two slide plates (2). The top of each slide plate (2) is fixedly connected to a hydraulic cylinder (3). One end of each hydraulic cylinder (3) is fixedly connected to a mounting bracket (4). One side of each mounting bracket (4) is provided with a fixing mechanism (5). The fixing mechanism (5) includes a fixing rod (501), one end of which is fixedly connected to one side of the mounting frame (4). A rotating block (502) is rotatably connected to the surface of the fixing rod (501). A sliding hollow block (503) is slidably connected to the surface of the rotating block (502). Mounting rods (504) are fixedly connected to both sides of the sliding hollow block (503). A ring frame (505) is rotatably connected to the surfaces of the two mounting rods (504). A connecting rod (506) is fixedly connected to the inner cavity of the rotating block (502). A fixing block (507) is rotatably connected to the surface of the connecting rod (506). A driving assembly (508) is provided on the surface of the ring frame (505).

2. A large diameter pipe welding set-up fixture according to claim 1, characterized in that: The drive assembly (508) includes a first mounting block (5081), one side of which is fixedly connected to the surface of the ring frame (505). A rotating rod (5082) is rotatably connected to the inner cavity of the first mounting block (5081). A connecting block (5083) is fixedly connected to one end of the rotating rod (5082). A fixing post (5084) is fixedly connected to one side of the mounting frame (4). A second mounting block (5085) is rotatably connected to one end of the fixing post (5084). A one-way threaded rod (5087) is rotatably connected to one side of the second mounting block (5085). The surface of the one-way threaded rod (5087) is threadedly connected to the inner cavity of the connecting block (5083). A first servo motor (5086) is fixedly connected to one side of the second mounting block (5085). The output end of the first servo motor (5086) passes through the second mounting block (5085) and is fixedly connected to one end of the one-way threaded rod (5087).

3. A large diameter pipe welding set-up fixture according to claim 2, wherein: Both of the two slide plates (2) are fixedly connected to the bottom of a threaded block (14). The inner cavity of the base plate (1) is rotatably connected to a bidirectional screw (13). The inner cavities of the two threaded blocks (14) are threadedly connected to the surface of the bidirectional screw (13). An inverted L-shaped plate (15) is fixedly connected to one side of the base plate (1). A second servo motor (16) is fixedly connected to one side of the inverted L-shaped plate (15). The output end of the second servo motor (16) passes through one side of the inverted L-shaped plate (15) and is fixedly connected to an extension rod (21). One end of the extension rod (21) passes through one side of the base plate (1) and is fixedly connected to one side of the arc-shaped block (12).

4. A large diameter pipe welding set-up fixture according to claim 3, wherein: An infrared receiver (9) is fixedly connected to the top of one of the mounting brackets (4), and an infrared transmitter (10) is fixedly connected to the top of the other mounting bracket (4). Two cylinders (11) are fixedly connected to the top of the base plate (1), and an arc block (12) is fixedly connected to the output end of each of the two cylinders (11).

5. A large diameter pipe welding set-up fixture according to claim 4, wherein: A hollow ring block (17) is fixedly connected to one side of the mounting bracket (4), and an arc-shaped slider (18) is fixedly connected to one side of the ring frame (505). The surface of the arc-shaped slider (18) is slidably connected to the inner cavity of the hollow ring block (17).

6. A large diameter pipe welding set-up fixture according to claim 3, wherein: A reinforcing block (19) is fixedly connected to one side of the mounting bracket (4), and a reinforcing groove (20) is provided at one end of the fixing column (5084). The surface of the reinforcing block (19) is fixedly connected to the inner cavity of the reinforcing groove (20).

7. A large diameter pipe welding set-up fixture as defined in claim 4, wherein: Hollow sleeves (7) and reinforcing blocks (6) are fixedly connected to the top of both slide plates (2), and sliding rods (8) are fixedly connected to the bottom of both mounting brackets (4). The surface of the sliding rods (8) is slidably connected to the inner cavity of the hollow sleeves (7), and the inner cavity of the reinforcing blocks (6) is fixedly connected to the surface of the hydraulic cylinder (3).

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