Hydraulic pipe bending machine

Abstract

The utility model discloses a hydraulic pipe bending machine, which relates to the technical field of pipe bending tools and comprises a base, a hydraulic device, two first rollers and two second rollers. A working space is formed in the base; the two first rollers are arranged in the working space in a spaced mode, the two ends of each first roller are connected to the two opposite side walls of the base, and the two second rollers are connected with the base and arranged above the working space in a spaced mode; a gap is formed between the second roller and the first roller in the vertical direction, and a pipe can be limited between the first roller and the second roller; the hydraulic device is connected with the base and located on the top of the working space, and the bottom of the hydraulic device is detachably connected with a pipe bending die. According to the pipe bending machine, a plurality of pipes can be bent at the same time, the pipe bending efficiency is high, the pipes are limited through the first roller and the second roller, and the pipe bending effect is better.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending tools, and in particular to a hydraulic pipe bending machine. Background Technology

[0002] With the use of various modern construction tools, the construction speed of buildings is getting faster and faster. Pipe pre-embedding and installation is an important part of the entire construction process. Therefore, if pipe installation can be accelerated, and if there is a pipe bending machine that can speed up pipe installation, the efficiency of pipe installation will inevitably be improved, thereby speeding up the construction progress and completing this task better.

[0003] There are many types of pipe bending machines available, such as manual pipe bending machines and hydraulic pipe bending machines, which are widely used. However, the various pipe bending machines in the current technology can only bend one pipe at a time, resulting in low bending efficiency. Furthermore, when bending, the pipe is placed directly on two rollers, which may cause uneven force on the pipe and displacement during the bending process, resulting in angular errors and poor bending effect. Utility Model Content

[0004] The main purpose of this utility model is to propose a hydraulic pipe bending machine, which aims to solve the technical problems of low bending efficiency and poor bending effect of existing pipe bending machines.

[0005] To achieve the above objectives, this utility model proposes a hydraulic pipe bending machine, comprising:

[0006] The base has a working space.

[0007] The first roller, there are two first rollers, and the two first rollers are spaced apart in the working space along the first horizontal direction. Each first roller extends along the second horizontal direction, and the two ends of each first roller are connected to the two opposite side walls of the base. The first horizontal direction is perpendicular to the second horizontal direction.

[0008] The second roller, there are two of them, and both of the second rollers are connected to the base and are spaced apart above the working space along the first horizontal direction; each of the second rollers extends along the second horizontal direction, and the second roller and the first roller have a vertical gap, and the tube can be located between the first roller and the second roller; along the first horizontal direction, the two second rollers are located between the two first rollers;

[0009] A hydraulic device is connected to the base and located at the top of the workspace. A pipe bending mold is detachably connected to the bottom of the hydraulic device, and the hydraulic device can drive the pipe bending mold to move downward so as to bend the pipe located between the first roller and the second roller to form a bend.

[0010] In one embodiment, the base includes two connecting plates spaced apart along the second horizontal direction, forming the working space between the two connecting plates. The two ends of each first roller along the second horizontal direction are respectively connected to the sides of the two connecting plates, and the two ends of each second roller along the second horizontal direction are respectively connected to the tops of the two connecting plates.

[0011] In one embodiment, each of the first rollers is provided with a plurality of first grooves, and the plurality of first grooves are spaced apart along the second horizontal direction;

[0012] Each of the second rollers has a plurality of second grooves, which are distributed at intervals along the second horizontal direction, and the number of the second grooves is the same as that of the first grooves and they correspond one-to-one.

[0013] The tubing can be located in the first groove and its corresponding second groove.

[0014] In one embodiment, each of the first rollers includes a first roller shaft and a first cylinder sleeved on the first roller shaft. The first roller shaft extends along the second horizontal direction, and the first cylinder can rotate around the first roller shaft. The first groove is formed by the outer edge of the first cylinder recessed inward. The two ends of the first roller shaft are respectively connected to the sides of the two connecting plates.

[0015] In one embodiment, the two connecting plates are provided with a plurality of connecting holes, and the number of connecting holes on the two connecting plates is the same and they are arranged in a one-to-one correspondence. Two connecting holes arranged in a corresponding manner on the two connecting plates form a pair of connecting holes, and the two ends of the first roller shaft can be connected to any pair of connecting holes respectively.

[0016] In one embodiment, each of the second rollers includes a second roller shaft and a second cylinder sleeved on the second roller shaft. The second roller shaft extends along the second horizontal direction, and the second cylinder can rotate around the second roller shaft. The second groove is formed by the outer edge of the second cylinder recessed inward. The two ends of the second roller shaft are respectively connected to the top of the two connecting plates.

[0017] In one embodiment, one of the connecting plates is a first connecting plate and the other connecting plate is a second connecting plate. The top of the first connecting plate is provided with a connecting seat, and the top of the second connecting plate is provided with a hinge seat.

[0018] The second roller shaft has a connecting end and a hinge end at its two ends along the second horizontal direction. The connecting end is detachably connected to the connecting seat, and the hinge end is hinged to the hinge seat. The second roller shaft can rotate around the hinge end when the connecting end is detached from the connecting seat, so that the connecting end moves away from or closer to the first connecting plate.

[0019] In one embodiment, the hydraulic device is provided with a first connecting rod and a second connecting rod on both sides along the second horizontal direction. The top end of the first connecting rod is hinged to the hydraulic device, and the bottom end of the first connecting rod is detachably connected to the first connecting plate. The first connecting rod can rotate around the top end when the bottom end is detached from the first connecting plate, so that the bottom end is close to or away from the first connecting plate.

[0020] The two ends of the second connecting rod are respectively connected to the hydraulic device and the second connecting plate.

[0021] In one embodiment, the first connecting rod has a buckle protruding on the side facing the first connecting plate, and the first connecting plate has a slot on the side away from the working space that engages with the buckle.

[0022] In one embodiment, the bottom of the pipe bending mold protrudes downward to form an arc-shaped bending portion, and the arc-shaped side of the arc-shaped bending portion is recessed upward to form a plurality of guide grooves that can respectively cooperate with the pipe material, and the plurality of guide grooves are spaced apart along the second horizontal direction, and each guide groove extends along the first horizontal direction.

[0023] This utility model of a hydraulic pipe bending machine, because the first roller and the second roller have a certain length, can limit multiple pipes between the first roller and the second roller for bending each time, resulting in high bending efficiency. Furthermore, by using the first roller and the second roller, multiple pipes can be limited, ensuring that multiple pipes are all located between the first roller and the second roller, thereby stabilizing the pipes during bending and ensuring the stability and uniform stress of each pipe during the bending process. This reduces the angular error caused by pipe offset, improves the quality and accuracy of pipe bending, and results in better bending effect. Attached Figure Description

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1A front view of an embodiment of the hydraulic pipe bending machine provided by this utility model;

[0026] Figure 2 Another front view of an embodiment of the hydraulic pipe bending machine provided by this utility model;

[0027] Figure 3 A side view of an embodiment of the hydraulic pipe bending machine provided by this utility model;

[0028] Figure 4 Another side view of an embodiment of the hydraulic pipe bending machine provided by this utility model;

[0029] Description of Figure Numbers:

[0030] 100. Hydraulic pipe bending machine; 1. Base; 11. Connecting plate; 11a. First connecting plate; 11b. Second connecting plate; 111. Connecting hole; 112. Connecting seat; 113. Hinge seat; 114. Slot; 12. Working space; 2. First roller; 21. First roller shaft; 22. First cylinder; 221. First groove; 3. Second roller; 31. Second roller shaft; 32. Second cylinder; 321. Second groove; 4. Hydraulic device; 41. Pipe bending mold; 411. Arc-shaped bending part; 412. Guide groove; 42. First connecting rod; 421. Buckle; 43. Second connecting rod;

[0031] 200. Pipes.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] 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.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] With the use of various modern construction tools, the construction speed of buildings is getting faster and faster. Pipe pre-embedding and installation is an important part of the entire construction process. Therefore, if pipe installation can be accelerated, and if there is a pipe bending machine that can speed up pipe installation, the efficiency of pipe installation will inevitably be improved, thereby speeding up the construction progress and completing this task better.

[0037] There are many types of pipe bending machines available, such as manual pipe bending machines and hydraulic pipe bending machines, which are widely used. However, the various pipe bending machines in the current technology can only bend one pipe at a time, resulting in low bending efficiency. Furthermore, when bending, the pipe is placed directly on two rollers, which may cause uneven force on the pipe and displacement during the bending process, resulting in angular errors and poor bending effect.

[0038] This utility model proposes a hydraulic pipe bending machine.

[0039] Please see Figures 1-4In one embodiment of this utility model, the hydraulic pipe bending machine 100 includes a base 1, a first roller 2, a second roller 3, and a hydraulic device 4; the base 1 forms a working space 12; two first rollers 2 are provided, and the two first rollers 2 are spaced apart in the working space 12 along a first horizontal direction, each first roller 2 extends along a second horizontal direction, and the two ends of each first roller 2 are connected to two opposite side walls of the base 1, the first horizontal direction being perpendicular to the second horizontal direction; two second rollers 3 are provided, and both second rollers 3 are connected to the base 1 and spaced apart along the first horizontal direction. The second roller 3 is positioned above the working space 12. Each second roller 3 extends along the second horizontal direction, and the second roller 3 and the first roller 2 have a vertical gap. The pipe 200 can be limited to the first roller 2 and the second roller 3. Along the first horizontal direction, the two second rollers 3 are located between the two first rollers 2. The hydraulic device 4 is connected to the base 1 and is located at the top of the working space 12. The bottom of the hydraulic device 4 is detachably connected to the pipe bending mold 41, and the hydraulic device 4 can drive the pipe bending mold 41 to move downward so that the pipe 200 limited to the first roller 2 and the second roller 3 is bent to form a bent pipe.

[0040] The hydraulic pipe bending machine of this utility model, because the first roller 2 and the first roller 3 have a certain length, can limit multiple pipes 200 between the first roller 2 and the first roller 3 for bending at one time, resulting in high bending efficiency. Furthermore, by using the first roller 2 and the second roller 3, multiple pipes 200 can be limited, so that multiple pipes 200 are all located between the first roller 2 and the first roller 3, which stabilizes the pipes 200 during bending, ensuring the stability and uniform force of each pipe 200 during the bending process, reducing the angle error caused by the pipe 200 offset, improving the quality and accuracy of bending, and resulting in better bending effect.

[0041] For ease of understanding and differentiation, pipe 200 is... Figure 1 and Figure 2 The middle lines are drawn using a different line type, such as Figure 2 As shown, when the pipe 200 is bent, it uses the first roller 2 as a fulcrum. The pipe 200 located in the working space 12 bends downward. Since the two second rollers 3 are both located between the two first rollers 2, the second rollers 3 do not interfere with the bending of the pipe 200 or the upward tilting of the pipe 200 located on both sides of the working space 12. In the first horizontal direction, there is a gap between the first rollers 2 and the first rollers 2, which allows the pipe 200 to move smoothly downward for bending.

[0042] The hydraulic device 4 is connected to the base 1, and the pipe bending mold 41 is detachably connected to the bottom of the hydraulic device 4. By changing different pipe bending molds 41, it can adapt to the bending requirements of pipes 200 of different diameters or shapes, increasing the flexibility and applicability of the equipment. Using a hydraulic system to replace manual operation reduces the labor intensity of manual labor, and at the same time, because mechanical operation is more stable and reliable, it reduces the risk of safety accidents.

[0043] like Figure 1 and Figure 3 As shown, the first horizontal direction is the left-right direction, the second horizontal direction is the front-back direction, and the vertical direction is the up-down direction.

[0044] Specifically, the base 1 can be a three-dimensional base 1, and the working space 12 can extend vertically through the entire base 1, so that the bending pipe has a larger working space 12, which is more conducive to the pipe 200 bending to a certain extent and forming quickly.

[0045] In one embodiment, the base 1 includes two connecting plates 11 spaced apart along a second horizontal direction, forming a working space 12 between the two connecting plates 11. The two ends of each first roller 2 along the second horizontal direction are respectively connected to the sides of the two connecting plates 11, and the two ends of each second roller 3 along the second horizontal direction are respectively connected to the top of the two connecting plates.

[0046] Understandably, the base 1 consists of two connecting plates 11, which have a simple structure and low manufacturing cost. The two connecting plates 11 make the installation of the first roller 2 and the second roller 3 simple and clear, and also facilitate daily inspection and maintenance, thus improving the maintainability of the equipment. In addition, the working space 12 formed between the two mounting plates is larger, which is more conducive to pipe bending.

[0047] Specifically, the two connecting plates 11 are parallel to each other, and both can be metal connecting plates 11 with good structural stability.

[0048] In one embodiment, each first roller 2 is provided with a plurality of first grooves 221, which are spaced apart along a second horizontal direction; each second roller 3 is provided with a plurality of second grooves 321, which are spaced apart along a second horizontal direction, and the number of second grooves 321 is the same as that of the first grooves 221 and they correspond one-to-one; the tube 200 can be located in the first grooves 221 and their corresponding second grooves 321.

[0049] Understandably, the design of the first groove 221 and the second groove 321 working together ensures that each pipe 200 can be accurately positioned in the predetermined position, avoiding slippage or displacement of multiple pipes 200 during the bending process, thereby improving the accuracy and consistency of pipe bending. Through the limiting effect of the first groove 221, the force on the first groove 221 during the bending process of the pipe 200 is more uniform, reducing local deformation or damage of the pipe 200 caused by uneven force, and improving the stability of the bending process. Most importantly, the design of multiple first grooves 221 allows for the simultaneous processing of multiple pipes 200, further improving the efficiency of pipe bending and shortening the construction time. It is particularly suitable for the pre-embedded installation of pipes 200 in large-scale construction projects. Furthermore, when multiple pipes 200 are bent, the first groove 221 and the second groove 321 cooperate one-to-one to avoid mutual interference or displacement between the pipes 200.

[0050] The shapes of the first groove 221 and the second groove 321 match the shape of the outer surface of the tube 200, thereby improving the limiting stability.

[0051] In one embodiment, each first roller 2 includes a first roller shaft 21 and a first cylinder 22 sleeved on the first roller shaft 21. The first roller shaft 21 extends along a second horizontal direction, and the first cylinder 22 can rotate around the first roller shaft 21. A plurality of first grooves 221 are formed by the outer edge of the first cylinder 22 being recessed inward. The two ends of the first roller shaft 21 are respectively connected to the sides of two connecting plates 11.

[0052] Understandably, the first cylinder 22 can rotate around the first roller shaft 21, so that the tube 200 can drive the first cylinder 22 to rotate freely during the downward bending process, which reduces the frictional resistance between the tube 200 and the first cylinder 22 and improves the smoothness and flexibility of the bending process. Since the first cylinder 22 can rotate, the tube 200 will not be fixed in one position during the bending process and will not cause local wear, thereby extending the service life of the tube 200 and the roller.

[0053] Furthermore, the first cylinder 22 is sleeved on the first roller 21, which facilitates disassembly and installation. Depending on the shape of the selected pipe 200, the first cylinder 22 with different sizes of the first groove 221 can be quickly replaced to be suitable for pipe bending operations of different sizes of pipe 200.

[0054] In one embodiment, multiple connecting holes 111 are provided on the two connecting plates 11 respectively, and the number of connecting holes 111 on the two connecting plates 11 is the same and they are arranged in a one-to-one correspondence. Two connecting holes 111 arranged in a corresponding manner on the two connecting plates 11 form a pair of connecting holes 111, and the two ends of the first roller shaft 21 can be connected to any pair of connecting holes 111 respectively.

[0055] Understandably, by setting multiple sets of connection holes 111, the first roller 21 can be installed in multiple positions. The position of the first roller 2 can be adjusted according to actual needs, increasing the flexibility of the equipment and adapting to different pipe bending requirements. By adjusting the position of the first roller 2, the interval between the first roller 2 and the second roller 3 can be changed to adapt to pipes 200 of different sizes, thus improving versatility.

[0056] Specifically, the end of the first roller shaft 21 can be inserted into the connecting hole 111 and then fixed by bolts, which improves the structural stability.

[0057] In one embodiment, each second roller 3 includes a second roller shaft 31 and a second cylinder 32 sleeved on the second roller shaft 31. The second roller shaft 31 extends along a second horizontal direction, and the second cylinder 32 can rotate around the second roller shaft 31. A plurality of second grooves 321 are formed by the outer edge of the second cylinder 32 being recessed inward. The two ends of the second roller shaft 31 are respectively connected to the top of two connecting plates 11.

[0058] Understandably, the second cylinder 32 can rotate around the second roller shaft 31, allowing the tube 200 to rotate freely during downward bending, reducing the frictional resistance between the tube 200 and the second cylinder 32, and improving the smoothness and flexibility of the bending process. Since the second cylinder 32 can rotate, the tube 200 will not be fixed in two positions during bending, thus preventing local wear and extending the service life of the tube 200 and the roller.

[0059] In addition, the first cylinder 22 is sleeved on the first roller shaft 21, which facilitates disassembly and installation and makes it easy to replace the first cylinder 22 of different sizes.

[0060] like Figures 3-4 As shown, in one embodiment, one of the connecting plates 11 is a first connecting plate 11a, and the other connecting plate is a second connecting plate 11b. The top of the first connecting plate 11a is provided with a connecting seat 112, and the top of the second connecting plate 11b is provided with a hinge seat 113. The two ends of the second roller shaft 31 along the second horizontal direction are a connecting end and a hinge end, respectively. The connecting end is detachably connected to the connecting seat 112, and the hinge end is hinged to the hinge seat 113. The second roller shaft 31 can rotate around the hinge end when the connecting end is detached from the connecting seat 112, so that the connecting end moves away from or closer to the first connecting plate 11a.

[0061] Understandably, the connecting end of the second roller 31 is detachably connected to the connecting seat 112, and the hinged end is hinged to the hinge seat 113, so that the second roller 3 can rotate around the hinge seat 113. This facilitates the placement of the pipe 200, which is first supported above the first roller 2. Especially for longer pipes 200, when only a portion needs to be bent, that portion of the pipe can be directly placed into the first roller 2, and then the second roller 3 can be rotated so that the connecting end of the second roller 3 is connected to the connecting seat 112, thereby achieving the purpose of limiting the pipe 200. This can improve the placement speed of the pipe 200 and thus improve the bending efficiency.

[0062] In one embodiment, the hydraulic device 4 is provided with a first connecting rod 42 and a second connecting rod 43 on both sides along the second horizontal direction. The top end of the first connecting rod 42 is hinged to the hydraulic device 4, and the bottom end of the first connecting rod 42 is detachably connected to the first connecting plate 11a. The first connecting rod 42 can rotate around the top end when the bottom end is detached from the first connecting plate 11a, so that the bottom end can approach or move away from the first connecting plate 11a. The two ends of the second connecting rod 43 are respectively connected to the hydraulic device 4 and the second connecting plate 11b.

[0063] Understandably, the bottom end of the first connecting rod 42 is detachably connected to the first connecting plate 11a, allowing the first connecting plate 11a to open an opening, thereby facilitating the placement of the pipe 200 onto the first roller 2, which opens together with the aforementioned second roller shaft 31 and presents an opening. Figure 4 As shown, not only can the pipe 200 be installed quickly, but it is also easy to remove the pipe 200 quickly after the pipe bend is completed, thus improving the efficiency of the pipe bending work.

[0064] Furthermore, since the first connecting rod 42 and the second connecting rod 43 are respectively provided on both sides of the second horizontal direction, the first connecting rod 42 and the second connecting rod 43 can effectively ensure that the connection between the hydraulic device 4 and the base 1 is relatively stable when bending the pipe, and avoid the force generated by the hydraulic device 4 when bending the pipe, which would cause the relative position between the two to shift and affect the final bending effect.

[0065] In one embodiment, the first connecting rod 42 has a buckle 421 protruding on the side facing the first connecting plate 11a, and the first connecting plate 11a has a slot 114 on the side away from the working space 12 that engages with the buckle 421.

[0066] Understandably, the design of the buckle 421 and the slot 114 makes the connection between the first connecting rod 42 and the first connecting plate 11a very quick and easy. The operator only needs to align the buckle 421 with the slot 114 and push gently to complete the installation; pulling it out in the opposite direction allows for disassembly, greatly saving time and labor. Furthermore, the cooperation between the buckle 421 and the slot 114 ensures a secure connection between the first connecting rod 42 and the first connecting plate 11a, preventing loosening or detachment due to vibration or impact during pipe bending, thus enhancing the structural stability of the entire device. The engagement of the buckle 421 and the slot 114 effectively ensures that the hydraulic device 4 and the base 1 maintain a certain degree of vertical stability, avoiding errors during pipe bending.

[0067] In one embodiment, the bottom of the pipe bending mold 41 protrudes downward to form an arc-shaped bending portion 411, and the arc-shaped side of the arc-shaped bending portion 411 is recessed upward to form a plurality of guide grooves 412 that can respectively cooperate with the pipe 200, and the plurality of guide grooves 412 are spaced apart along the second horizontal direction, and each guide groove 412 extends along the first horizontal direction.

[0068] Understandably, the design of the arc-shaped bending section 411 ensures that the bending die 41 can provide a precise bending path during the bending process, reducing bending errors caused by irregular die shape and improving the accuracy and consistency of bending. Moreover, the design of the guide groove 412 allows each pipe 200 to be accurately positioned in the predetermined position, avoiding slippage or displacement of the pipe 200 during the bending process, and ensuring the stability and uniformity of the bending. Most importantly, the multiple guide grooves 412 are distributed at intervals along the second horizontal direction, allowing multiple pipes 200 to be processed simultaneously, further improving the efficiency of bending and shortening the construction time. This is particularly suitable for the pre-embedded installation of pipes 200 in large-scale construction projects.

[0069] Furthermore, the limiting function of the guide groove 412 reduces the risk of the pipe 200 accidentally falling off or flying out during bending, improves operational safety, and protects the personal safety of operators.

[0070] In some embodiments, the degree of curvature of each guide groove 412 may be inconsistent, thereby obtaining pipes 200 with different degrees of curvature. When in use, the corresponding guide groove 412 can be selected according to the required degree of curvature, which improves versatility.

[0071] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hydraulic pipe bending machine, characterized in that, include: The base has a working space. The first roller, there are two first rollers, and the two first rollers are spaced apart in the working space along the first horizontal direction. Each first roller extends along the second horizontal direction, and the two ends of each first roller are connected to the two opposite side walls of the base. The first horizontal direction is perpendicular to the second horizontal direction. The second roller, there are two of them, and both of the second rollers are connected to the base and are spaced apart above the working space along the first horizontal direction; each of the second rollers extends along the second horizontal direction, and the second roller and the first roller have a vertical gap, and the tube can be located between the first roller and the second roller; along the first horizontal direction, the two second rollers are located between the two first rollers; A hydraulic device is connected to the base and located at the top of the workspace. A pipe bending mold is detachably connected to the bottom of the hydraulic device, and the hydraulic device can drive the pipe bending mold to move downward so as to bend the pipe located between the first roller and the second roller to form a bend.

2. The hydraulic pipe bending machine as described in claim 1, characterized in that, The base includes two connecting plates spaced apart along the second horizontal direction, forming the working space between the two connecting plates. The two ends of each first roller along the second horizontal direction are respectively connected to the sides of the two connecting plates, and the two ends of each second roller along the second horizontal direction are respectively connected to the top of the two connecting plates.

3. The hydraulic pipe bending machine as described in claim 2, characterized in that, Each of the first rollers is provided with a plurality of first grooves, and the plurality of first grooves are spaced apart along the second horizontal direction; Each of the second rollers has a plurality of second grooves, which are distributed at intervals along the second horizontal direction, and the number of the second grooves is the same as that of the first grooves and they correspond one-to-one. The tubing can be located in the first groove and its corresponding second groove.

4. The hydraulic pipe bending machine as described in claim 3, characterized in that, Each of the first rollers includes a first roller shaft and a first cylinder sleeved on the first roller shaft. The first roller shaft extends along the second horizontal direction, and the first cylinder can rotate around the first roller shaft. The first groove is formed by the outer edge of the first cylinder recessed inward. The two ends of the first roller shaft are respectively connected to the sides of the two connecting plates.

5. The hydraulic pipe bending machine as described in claim 4, characterized in that, The two connecting plates are provided with a plurality of connecting holes, and the number of connecting holes on the two connecting plates is the same and they are arranged in a one-to-one correspondence. Two connecting holes arranged in a corresponding manner on the two connecting plates form a pair of connecting holes, and the two ends of the first roller shaft can be connected to any pair of connecting holes respectively.

6. The hydraulic pipe bending machine as described in claim 3, characterized in that, Each of the second rollers includes a second roller shaft and a second cylinder sleeved on the second roller shaft. The second roller shaft extends along the second horizontal direction, and the second cylinder can rotate around the second roller shaft. The second groove is formed by the outer edge of the second cylinder recessed inward. The two ends of the second roller shaft are respectively connected to the top of the two connecting plates.

7. The hydraulic pipe bending machine as described in claim 6, characterized in that, One of the connecting plates is a first connecting plate, and the other connecting plate is a second connecting plate. The top of the first connecting plate is provided with a connecting seat, and the top of the second connecting plate is provided with a hinge seat. The second roller shaft has a connecting end and a hinge end at its two ends along the second horizontal direction. The connecting end is detachably connected to the connecting seat, and the hinge end is hinged to the hinge seat. The second roller shaft can rotate around the hinge end when the connecting end is detached from the connecting seat, so that the connecting end moves away from or closer to the first connecting plate.

8. The hydraulic pipe bending machine as described in claim 7, characterized in that, The hydraulic device is provided with a first connecting rod and a second connecting rod on both sides along the second horizontal direction. The top end of the first connecting rod is hinged to the hydraulic device, and the bottom end of the first connecting rod is detachably connected to the first connecting plate. The first connecting rod can rotate around the top end when the bottom end is detached from the first connecting plate, so that the bottom end is closer to or further away from the first connecting plate. The two ends of the second connecting rod are respectively connected to the hydraulic device and the second connecting plate.

9. The hydraulic pipe bending machine as described in claim 8, characterized in that, The first connecting rod has a buckle protruding on one side facing the first connecting plate, and the first connecting plate has a slot on the side away from the working space that engages with the buckle.

10. The hydraulic pipe bending machine as described in any one of claims 1 to 9, characterized in that, The bottom of the pipe bending mold protrudes downward to form an arc-shaped bending part, and the arc-shaped side of the arc-shaped bending part is recessed upward to form a plurality of guide grooves that can respectively cooperate with the pipe material, and the plurality of guide grooves are distributed at intervals along the second horizontal direction, and each guide groove extends along the first horizontal direction.

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