An improved pipe stretching machine

Abstract

The present invention discloses an improved pipe stretching machine, which belongs to the field of pipe processing equipment. The pipe is automatically loaded from the side of the equipment, which can save the space occupied by the equipment. The present invention discloses an improved pipe stretching machine, which comprises a first frame, a second frame and a stretching machine, which are arranged side by side. The pipe is placed between the first frame and the second frame. A guide part capable of guiding the pipe to the stretching machine is provided at the end of the second frame. A lifting device for conveying the pipe to the guide part is provided between the first frame and the second frame.

Description

[Technical field]

[0001] The invention relates to the field of pipe processing equipment, and in particular to an improved pipe stretching machine. [Background technology]

[0002] When producing long pipes, generally, thick and short pipes are produced first to shorten the process of producing pipe blanks, and then the pipes are drawn using a stretching machine to produce thin and long pipes. The length of the pipes will be greatly extended. When producing coils, the drawn pipes can be coiled and stored, but when producing branch pipes, they cannot be stored in this way. Therefore, the production length of the equipment is longer, and the material needs to be loaded at the other end of the equipment, and the loading equipment also needs to occupy a large space. If the material can be loaded from the side of the equipment, the loading equipment and the stretching equipment can be set side by side to shorten the length of the overall equipment. [Summary of the invention]

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and propose an improved pipe stretching machine, in which pipes are automatically loaded from the side of the equipment, thereby saving equipment space.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An improved pipe stretching machine comprises a first frame, a second frame and a stretching machine, which are arranged side by side, a pipe is placed between the first frame and the second frame, a guide part capable of guiding the pipe to the stretching machine is provided at the end of the second frame, and a lifting device for conveying the pipe to the guide part is provided between the first frame and the second frame.

[0006] The pipe stretching machine of the present invention can automatically load materials. The pipes to be processed are placed between the first frame and the second frame. There is a large space between the two, which can store a considerable number of pipes, so that the equipment can maintain long-term operation without adding pipes. The guide part can guide the movement of the pipes and guide the pipes to the stretching machine, thereby realizing automatic loading. The lifting device transfers the pipes between the first frame and the second frame to the guide part. Different from traditional equipment, since the first frame, the second frame and the stretching machine are arranged side by side, the pipes are loaded from the side of the stretching machine, thereby shortening the length of the equipment and reducing the pressure on the equipment placement site.

[0007] Furthermore, the lifting device includes a belt connected between the ends of the first frame and the second frame, and a driving device for controlling the tension and relaxation of the belt, and the pipe rises and falls as the belt is tensioned and relaxed. The belt is relatively soft, and when the pipe is placed on the belt, the belt will be pressed downward by the weight of the pipe to form an arc-shaped belt support, and there will be mutual force between the pipes, and the belt will block the movement of the pipe under the action of the force between each other. As the driving device is started, the belt is gradually tightened, and as the belt is tightened, the pipe will be lifted upward. When there is no obstruction on the side of the pipe, the top pipe will move to the guide part, realizing the automatic transmission of the pipe, and as the belt is relaxed, the pipe gradually falls.

[0008] Furthermore, the driving device includes a reel for winding the belt and a motor for driving the reel to rotate. The tension and relaxation of the belt are controlled by the driving device. When the reel rotates, the belt can be wound on its surface to achieve the tension of the belt and the rise of the pipe. After the motor is reversed, the reel releases the wound belt to relax it and the pipe is lowered. Although the belt can be pulled by using components such as cylinders, the travel is limited after all. Within the limited height of the first frame, tightening the belt by winding is the best solution.

[0009] Furthermore, the first frame is provided with a roller, and the belt is connected to the winding wheel after passing through the roller. The belt keeps in contact with the roller, and when the belt moves due to loosening or tensioning, the roller can be driven to move synchronously, thereby reducing the wear of the belt caused by the loosening or tensioning process, prolonging the service life, and the winding wheel can more easily wind the belt.

[0010] Furthermore, the first frame is higher than the second frame. Therefore, as the pipe continues to rise, the obstruction at the second frame disappears first, which can ensure that the pipe moves towards the guide portion, and the arc-shaped belt support formed by the belt is high at one end and low at the other end, and its lowest point is not located between the first frame and the second frame, but is more biased towards the second frame. Therefore, the force between the pipes will make the pipe more inclined to move towards the second frame, the height of the pipe lifting can be lower, and it can move to the guide portion more quickly.

[0011] Furthermore, a material blocking device is provided on the second frame, and the material blocking device can block the pipe from moving toward the stretching machine on the guide portion or release the blocking of the pipe. The material blocking device can block the pipe, and when there is a pipe on the stretching machine, prevent the pipe from moving to the stretching machine, and only release the blocking of the pipe after the stretching machine is free, so as to realize automatic feeding of the pipe.

[0012] Furthermore, the guide part is a first guide surface and a second guide surface, the first guide surface can guide the pipe to roll between the first frame and the second frame, and the second guide surface can guide the pipe to roll onto the stretching machine. The pipe is lifted upward by the lifting device, and part of the pipe moves toward the second frame and thus moves onto the guide part. When the belt is loosened, the pipe falls with the belt, and part of the pipe remains on the guide part. The pipe on the first guide surface rolls down onto the belt, and the pipe on the second guide surface rolls toward the stretching machine.

[0013] Furthermore, the material blocking device can block the pipe on the second guide surface. If there are two pipes, the second pipe will be blocked on the first guide surface. The material blocking device can keep the pipes on the guide part, but can only keep one pipe. Most of the body of the other pipe falls on the first guide surface and is difficult to keep on the guide part. Therefore, when feeding, it can be ensured that only one pipe is moved at a time.

[0014] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0015] The present invention will be further described below in conjunction with the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the side structure of the pipe stretching machine in an embodiment of the present invention.

[0017] Reference numerals:

[0018] A first rack 100;

[0019] The second frame 200, the guide portion 210, the first guide surface 211, and the second guide surface 212;

[0020] Material blocking device 220, lifting cylinder 221, blocking block 222;

[0021] Stretching machine 300;

[0022] Lifting device 400 , belt 410 , driving device 420 , winding wheel 421 , motor 422 , roller 423 . [Specific implementation method]

[0023] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] Embodiment 1

[0029] Reference Figure 1The present invention proposes an improved pipe stretching machine, comprising a first frame 100, a second frame 200, and a stretching machine 300, which are arranged side by side, and the pipe is placed between the first frame 100 and the second frame 200. A guide portion 210 capable of guiding the pipe to the stretching machine 300 is provided at the end of the second frame 200, and a lifting device 400 for conveying the pipe to the guide portion 210 is provided between the first frame 100 and the second frame.

[0030] The pipe stretching machine 300 of the present invention can be automatically loaded. The pipe to be processed is placed between the first frame 100 and the second frame 200. There is a large space between the two, which can store a considerable number of pipes, so that the equipment can maintain long-term operation without adding pipes. The guide part 210 can guide the movement of the pipes and guide the pipes to the stretching machine 300, so as to realize automatic loading. The lifting device 400 transfers the pipes between the first frame 100 and the second frame 200 to the guide part 210. Different from the traditional equipment, since the first frame 100, the second frame 200 and the stretching machine 300 are arranged side by side, the pipes are loaded from the side of the stretching machine 300, so that the length of the equipment can be shortened and the pressure on the equipment placement site can be reduced.

[0031] Among them, the lifting device 400 includes a belt 410 and a driving device 420 for controlling the tensioning and relaxing of the belt 410. The belt 410 is connected between the ends of the first frame 100 and the second frame 200. The pipe is placed on the belt 410. The pipe rises and falls as the belt 410 is tensioned and relaxed. The belt 410 is relatively soft. When the pipe is placed on the belt 410, the belt 410 will be pressed downward by the gravity of the pipe to form an arc-shaped belt support. There will also be mutual forces between the pipes, and the belt 410 will block the movement of the pipe under the action of each other. As the driving device 420 is started, the belt 410 is gradually tensioned. As the belt 410 is tensioned, the pipe will be lifted upward. When there is no obstruction on the side of the pipe, the top pipe will move to the guide part 210, realizing automatic transmission of the pipe. As the belt 410 is relaxed, the pipe gradually descends.

[0032] In order to ensure that the pipe moves toward the second rack 200 after being lifted, the height of the first rack 100 is higher than that of the second rack 200. Therefore, as the pipe continues to rise, the obstruction to the pipe at the second rack 200 disappears first, which can ensure that the moving direction of the pipe must be towards the guide portion 210. In addition, the arc-shaped belt support formed by the belt 410 is high at one end and low at the other end, and its lowest point is not located between the first rack 100 and the second rack 200, but is more biased towards the second rack 200. Therefore, the acting force between the pipes will make the pipe more inclined to move toward the second rack 200, and can move to the guide portion 210 more quickly, which can reduce the height required to lift the pipe and reduce power consumption.

[0033] The stretching machine 300 can only stretch one pipe at a time during operation, so when conveying pipes to the stretching machine 300, they can only be conveyed one by one. Therefore, in order to achieve this purpose, a material blocking device 220 is provided on the second frame 200. The material blocking device 220 can block the pipe from moving toward the stretching machine 300 when there are pipes on the stretching machine 300, and can also release the blocking of the pipe after the stretching machine 300 is free, so that it can move to the stretching machine 300, thereby realizing automatic feeding of the pipe.

[0034] The guide portion 210 is provided with a first guide surface 211 and a second guide surface 212. The first guide surface 211 can guide the pipe to roll between the first frame 100 and the second frame 200, and the second guide surface 212 can guide the pipe to roll onto the stretching machine 300. Therefore, when the pipe is lifted upward by the lifting device 400, part of the pipe will move toward the second frame 200 and thus move onto the guide portion 210. When the belt 410 is loosened, the pipe descends with the belt 410, and part of the pipe remains on the guide portion 210. The pipe on the first guide surface 211 rolls down onto the belt 410, and the pipe on the second guide surface 212 rolls toward the stretching machine 300. The first guide surface 211 and the second guide surface 212 can be inclined surfaces or curved surfaces.

[0035] Under the blocking action of the blocking device 220, the pipe can stay on the second guide surface 212 or most of the pipe body is located on the second guide surface 212, and remain still under the action of the blocking device 220. If there are two pipes on the guide part 210, the second pipe cannot continue to move due to the blocking of the first pipe, and will remain on the first guide surface 211 or most of its pipe body is located on the first guide surface 211, and will return to the belt 410 along the first guide surface 211, thereby ensuring that the pipes can be fed one by one without hindering the normal operation of the stretching machine 300.

[0036] Embodiment 2

[0037] This embodiment specifically describes the structure of the driving device 420. Specifically, refer to Figure 1 The driving device 420 includes a reel 421 for winding the belt 410 and a motor 422 for driving the reel 421 to rotate, and also includes a roller 423 disposed on the first frame 100. One end of the belt 410 is fixed to the second frame 200, and the other end is fixed to the reel 421 after passing through the roller 423.

[0038] The tensioning and loosening of the belt 410 is controlled by the driving device 420. When the reel 421 rotates, the belt 410 can be wound around its surface, so that the belt 410 is tensioned and the pipe is lifted. After the motor 422 is reversed, the reel 421 releases the wound belt 410, so that it is loosened and the pipe is lowered. The belt 410 maintains contact with the roller 423. When the belt 410 is loosened or tensioned and moves, the roller 423 can be driven to move synchronously, thereby reducing the wear of the belt 410 during the loosening or tensioning process and extending its service life. The reel 421 can wind the belt 410 more easily. Although the belt 410 can be pulled by using components such as a cylinder, the stroke is limited after all. Within the limited height of the first frame, tightening the belt 410 by winding is the best solution.

[0039] Embodiment 3

[0040] This embodiment specifically describes the structure of the material blocking device 220. Specifically, refer to Figure 1 The material blocking device 220 includes a lifting cylinder 221 and a blocking block 222 hinged to the end of the piston rod of the lifting cylinder 221 . The blocking block 222 is rotatably matched with the second frame 200 , and the lifting cylinder 221 is fixed on the second frame 200 .

[0041] As the lifting cylinder 221 controls the lifting of the piston rod, it will also push the blocking block 222 to rotate around the connection between it and the second frame 200, so as to block and release the blocking of the pipe.

[0042] In addition, a sensor (not shown in the figure) is also provided at the material blocking device 220, which can sense whether there is a pipe in contact with the blocking block 222. When a pipe is in contact with the blocking block 222, the lifting device 400 stops lifting the pipe (at this time, the blocking part is located at Figure 1 When it is sensed that there is no contact between the pipe and the blocking block 222 (the blocking portion is at M1 in this case), the pipe stops feeding; Figure 1 At M2 in the middle, the lifting device 400 starts to lift the pipe and transfer the pipe to the guide part 210.

[0043] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. An improved pipe stretching machine, Features: The invention comprises a first frame, a second frame and a stretching machine, which are arranged side by side, and the pipe is placed between the first frame and the second frame. A guide part capable of guiding the pipe to the stretching machine is provided at the end of the second frame, and a lifting device capable of conveying the pipe to the guide part is provided between the first frame and the second frame; a material blocking device is provided on the second frame, and the material blocking device can block the pipe from moving toward the stretching machine on the guide part or release the blocking of the pipe; the guide part comprises a first guide surface and a second guide surface, and the first guide surface can guide the pipe to roll between the first frame and the second frame, and the second guide surface can guide the pipe to roll onto the stretching machine; The material blocking device can block the pipe on the second guide surface. If there are two pipes, the second pipe will be blocked on the first guide surface; the material blocking device includes a lifting cylinder and a blocking block hinged to the end of the piston rod of the lifting cylinder. The blocking block cooperates with the second frame for rotation, and the lifting cylinder is fixed on the second frame; as the lifting cylinder controls the lifting and lowering of the piston rod, it will also push the blocking block to rotate with its connection with the second frame as the center, thereby blocking and releasing the blocking of the pipe; the lifting device includes a belt connected between the ends of the first frame and the second frame, and a driving device for controlling the tensioning and relaxation of the belt, and the pipe rises and falls as the belt is tensioned and relaxed.

2. An improved tube stretching machine according to claim 1, Features: The driving device includes a pulley for winding the belt and a motor for driving the pulley to rotate.

3. An improved tube stretching machine according to claim 2, Features: The first frame is provided with a roller, and the belt is connected to the winding wheel after passing around the roller.

4. An improved tube stretching machine according to claim 1, Features: The first frame is higher than the second frame.

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