Bending device with differential pressure pipe positioning double-cylinder drive and grating protection

Abstract

The application discloses a differential pressure pipe positioning double-cylinder driving bending device with grating protection and relates to the field of pipe machining equipment.The device comprises a rack, a positioning and locking mechanism, a driving structure and a grating protection assembly.The positioning and locking mechanism comprises a positioning seat and a locking assembly, and the positioning seat is provided with a positioning groove which can be connected with the differential pressure pipe.The driving structure is provided with a first driving cylinder and a second driving cylinder whose piston rod extension directions are perpendicular to each other, and the first driving cylinder and the second driving cylinder can bend the differential pressure pipe respectively.When the grating protection assembly detects that a human body approaches the bending area, the two driving cylinders are controlled to stop moving.The scheme can constrain the pipe through the positioning groove and the locking assembly, can inhibit rebound deviation and stabilize the machining reference, and the double cylinders can realize multidirectional bending through single clamping, which is favorable for reducing repeated positioning errors.The grating protection assembly can timely brake the equipment, which is favorable for taking into account the bending forming quality and operation safety.

Description

Technical Field

[0001] This application relates to the field of pipe fitting processing equipment technology, and in particular to a differential pressure pipe positioning dual-cylinder driven bending device with grating protection. Background Technology

[0002] The differential pressure pipe is a crucial component of the engine emission control system, and the quality of its bending process directly affects its pressure transmission performance and assembly fit. Currently, differential pressure pipe bending is mostly performed using single-cylinder driven bending fixtures, relying on ordinary jigs to clamp the pipe and complete the bending and forming operation.

[0003] In actual processing, existing bending fixtures are prone to loosening due to the springback of the pipe and equipment vibration, causing the pipe to shift in the processing position. Single-sided driving bending results in concentrated force, and the pipe is prone to cross-sectional distortion, wall thinning, or even cracking and wrinkling due to unidirectional force. At the same time, under manual loading and unloading conditions, operators' hands can easily enter the bending operation area, and conventional equipment lacks reliable area protection measures, which can easily lead to safety accidents such as pinching injuries. It is difficult to simultaneously ensure the bending accuracy, forming quality, and operational safety of the pipe. Summary of the Invention

[0004] The purpose of this application is to provide a differential pressure pipe positioning dual-cylinder driven bending device with grating protection, which aims to solve the technical problems of poor reliability of pipe bending and positioning, uneven force, and lack of safety protection in the working area in the prior art.

[0005] To achieve the above objectives, this application provides a differential pressure tube positioning dual-cylinder driven bending device with grating protection, including a frame, a positioning and locking mechanism, a drive structure and a grating protection component; The positioning and locking mechanism includes a positioning seat and a locking assembly. Both the positioning seat and the locking assembly are mounted on the frame. The locking assembly is configured to lock the differential pressure tube to be bent. The positioning seat has a positioning groove, which is configured to engage with the differential pressure tube. The drive structure includes a first drive cylinder and a second drive cylinder, both of which are mounted on the frame. The extension and retraction direction of the piston rod of the first drive cylinder is perpendicular to that of the piston rod of the second drive cylinder. The first drive cylinder is configured to drive its own piston rod to move toward the differential pressure tube and bend the differential pressure tube. The second drive cylinder is configured to drive its own piston rod to move toward the differential pressure tube and bend the differential pressure tube. The grating protection component is mounted on the frame and is configured to control the first drive cylinder and the second drive cylinder to stop operating when a human body is detected approaching the bending operation area.

[0006] In some optional embodiments, the locking assembly includes a first locking assembly and a second locking assembly; both the first locking assembly and the second locking assembly are disposed on the positioning seat, the positioning groove is used to engage with one side of the differential pressure tube, the second locking assembly is used to abut with the other side of the differential pressure tube opposite to the positioning groove, the second locking assembly applies a clamping force to the differential pressure tube in the vertical direction, and the first locking assembly applies a clamping force to the differential pressure tube in the horizontal direction.

[0007] In some optional embodiments, the first locking assembly includes a first support, a first crank-connecting rod mechanism, and a first clamping member. The first support is fixedly connected to the frame, the first crank-connecting rod mechanism is rotatably connected to the first support, and the first clamping member is connected to the output end of the first crank-connecting rod mechanism.

[0008] In some optional embodiments, the second locking assembly includes a second support, a second crank-connecting rod mechanism, and a second clamping member. The second support is fixedly connected to the frame, the second crank-connecting rod mechanism is rotatably connected to the second support, and the second clamping member is connected to the output end of the second crank-connecting rod mechanism.

[0009] In some optional embodiments, the first locking assembly further includes a first anti-slip rubber pad disposed on the pressing surface of the first pressing member.

[0010] In some optional embodiments, the second locking assembly further includes a second anti-slip rubber pad disposed on the pressing surface of the second pressing member.

[0011] In some alternative embodiments, the positioning groove is a V-groove, the contour of which is adapted to the outer contour of the differential pressure tube.

[0012] In some optional embodiments, the differential pressure tube positioning dual-cylinder driven bending device with grating protection further includes a first nylon block and a second nylon block, wherein the first nylon block is detachably connected to the piston rod output end of the first driving cylinder, and the second nylon block is detachably connected to the piston rod output end of the second driving cylinder.

[0013] In some optional embodiments, the first nylon block has a first arcuate contact surface, the second nylon block has a second arcuate contact surface, the radius of the arc of the first arcuate contact surface is greater than or equal to the outer diameter of the differential pressure tube, and the radius of the arc of the second arcuate contact surface is greater than or equal to the outer diameter of the differential pressure tube.

[0014] In some optional embodiments, the grating protection assembly includes a grating sensor and a signal processor, wherein the grating sensor is symmetrically arranged on both sides of the bending area of ​​the frame, and the grating sensor is disposed on the frame.

[0015] In some optional embodiments, the differential pressure tube positioning dual-cylinder driven bending device with grating protection further includes a pneumatic control unit, which is connected to the first drive cylinder and the second drive cylinder respectively.

[0016] In some optional embodiments, the pneumatic control unit includes a start button, a cylinder sequence control module, and a pressure regulating valve. The start button is located at the operating end of the frame. The cylinder sequence control module is connected to the first drive cylinder and the second drive cylinder, respectively. The pressure regulating valve is connected to the air supply circuit of the first drive cylinder and the second drive cylinder.

[0017] The above-mentioned technical solution of this application has at least the following beneficial technical effects: The technical solution of this application uses a positioning groove and a locking assembly to engage and lock the differential pressure pipe to be bent, which can suppress the positional displacement caused by springback during the bending process and help maintain a stable processing benchmark for the pipe. Through a first and second drive cylinder arranged perpendicularly to each other in the piston rod extension direction within the drive structure, each cylinder can drive its own piston rod to move towards the differential pressure pipe and perform bending. This allows for bending in different directions without reassembling the pipe, reducing positioning errors caused by multiple clamping operations and improving the processing efficiency and forming quality of multi-segment bending. Combined with a light grating protection assembly on the frame, when the light grating protection assembly detects a person approaching the bending work area, it can control the first and second drive cylinders to stop. This accurately identifies dangerous situations where personnel illegally approach and immediately brakes the equipment, ensuring bending processing capacity while effectively avoiding safety risks caused by personnel entering the bending area, significantly improving the safety and reliability of the equipment operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the differential pressure tube assembly process of an embodiment of the differential pressure tube positioning dual-cylinder driven bending device with grating protection provided in this application. Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0019] Figure label: 100. Differential pressure pipe; 1. Frame; 2. Positioning and locking mechanism; 21. Positioning seat; 211. Positioning groove; 22. Locking assembly; 221. First locking assembly; 2211. First support; 2212. First crank-connecting rod mechanism; 2213. First clamping element; 222. Second locking assembly; 2221. Second support; 2222. Second crank-connecting rod mechanism; 2223. Second clamping element; 3. Drive structure; 31. First drive cylinder; 32. Second drive cylinder. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this application. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0021] The embodiments described in this application are only some, not all, of the embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments described herein without inventive effort are within the scope of protection of this application.

[0022] Automotive differential pressure pipes are crucial components of engine emission control systems, and the quality of pipe bending directly impacts their pressure transmission performance and assembly fit. Currently, differential pressure pipe bending is mostly achieved using single-cylinder driven bending fixtures, relying on ordinary jigs to clamp the pipes and complete the bending process. However, existing bending fixtures are prone to loosening during actual processing due to pipe springback and equipment vibration, causing pipe position deviation. Single-sided driving bending concentrates force, leading to cross-sectional distortion, wall thinning, and even cracking and wrinkling of the pipes. Furthermore, in manual loading and unloading operations, operators' hands are easily caught in the bending area, and conventional equipment lacks reliable area protection, increasing the risk of pinching injuries and other safety accidents. It is difficult to simultaneously achieve bending accuracy, forming quality, and operational safety.

[0023] To address the aforementioned technical problems, this application provides a differential pressure tube positioning dual-cylinder driven bending device with grating protection.

[0024] In some alternative embodiments, please refer to Figure 1 and Figure 2 The differential pressure tube positioning dual-cylinder driven bending device with grating protection includes a frame 1, a positioning and locking mechanism 2, a drive structure 3, and a grating protection component.

[0025] The positioning and locking mechanism 2 includes a positioning seat 21 and a locking component 22. Both the positioning seat 21 and the locking component 22 are mounted on the frame 1. The locking component 22 is configured to lock the differential pressure tube 100 to be bent. The positioning seat 21 has a positioning groove 211, which is configured to engage with the differential pressure tube 100.

[0026] The drive structure 3 includes a first drive cylinder 31 and a second drive cylinder 32. Both the first drive cylinder 31 and the second drive cylinder 32 are mounted on the frame 1. The extension and retraction direction of the piston rod of the first drive cylinder 31 is perpendicular to the extension and retraction direction of the piston rod of the second drive cylinder 32. The first drive cylinder 31 is configured to drive its own piston rod to move toward the differential pressure tube 100 and bend the differential pressure tube 100. The second drive cylinder 32 is configured to drive its own piston rod to move toward the differential pressure tube 100 and bend the differential pressure tube 100.

[0027] The grating protection component is installed on the frame 1. The grating protection component is configured to control the first drive cylinder 31 and the second drive cylinder 32 to stop operating when a human body is detected approaching the bending operation area.

[0028] The technical solution of this application uses the positioning groove 211 and the locking component 22 to engage and lock the differential pressure pipe 100 to be bent, which can suppress the positional displacement caused by the springback during the bending process of the pipe and help maintain a stable processing reference for the pipe. Through the first driving cylinder 31 and the second driving cylinder 32 with their piston rods arranged perpendicularly to each other in the drive structure 3, the two cylinders can drive their own piston rods to move toward the differential pressure pipe 100 and perform bending. This can complete bending processing in different directions without reassembling the pipe, which helps reduce the positioning error caused by multiple clamping and improves the processing efficiency and forming quality of multi-segment bending. With the help of the grating protection component arranged on the frame 1, when the grating protection component detects a person approaching the bending operation area, it can control the first driving cylinder 31 and the second driving cylinder 32 to stop. This can accurately identify dangerous working conditions where personnel illegally approach and brake the equipment in time. While ensuring the bending processing capacity, it can effectively avoid the safety risks caused by personnel entering the bending area and greatly improve the safety and reliability of the equipment operation.

[0029] The specific implementation process of one embodiment of this application is as follows: The differential pressure tube 100 to be bent is placed in the positioning groove 211 of the positioning seat 21. The locking component 22 is activated to lock and fix the differential pressure tube 100. According to the bending process requirements, the first drive cylinder 31 is activated so that its piston rod extends toward the differential pressure tube 100 and cooperates to complete one bend. After the piston rod of the first drive cylinder 31 retracts and resets, the second drive cylinder 32 is activated so that its piston rod extends toward the differential pressure tube 100 to complete another bend. After all bending processes are completed, the piston rod of the second drive cylinder 32 retracts and resets. If the grating protection component detects a human body approaching the bending operation area during the operation, it immediately triggers a signal, causing the first drive cylinder 31 and the second drive cylinder 32 to stop moving.

[0030] In some optional embodiments, the locking assembly 22 includes a first locking assembly 221 and a second locking assembly 222; both the first locking assembly 221 and the second locking assembly 222 are disposed on the positioning seat 21, the positioning groove 211 is used to engage with one side of the differential pressure tube 100, and the second locking assembly 222 is used to abut with the other side of the differential pressure tube 100 opposite to the positioning groove 211. The second locking assembly 222 applies a clamping force to the differential pressure tube 100 in the vertical direction, and the first locking assembly 221 applies a clamping force to the differential pressure tube 100 in the horizontal direction.

[0031] Specifically, both the first locking assembly 221 and the second locking assembly 222 adopt a crank connecting rod dead point self-locking structure, and the two are respectively mounted on the positioning seat 21 by a pin hinge; the second locking assembly 222 is arranged directly above the positioning groove 211, and the first locking assembly 221 is arranged in a lateral position of the positioning groove 211.

[0032] In this embodiment, the second locking assembly 222 forms an opposing clamping structure with the positioning groove 211 in the vertical direction, which can limit the vertical movement of the differential pressure tube 100 and help maintain the continuous fit between the differential pressure tube 100 and the positioning groove 211. The first locking assembly 221 laterally abuts against the differential pressure tube 100 in the horizontal direction, which can restrain the horizontal rotation tendency generated during the bending process of the differential pressure tube 100 and help suppress the deviation of the pipe under the bending force. The two sets of locking assemblies 22 cooperate with each other to constrain the differential pressure tube 100 from different directions, which can share the reverse load under the bending condition, which can reduce the load borne by a single clamping position and reduce the risk of pipe loosening.

[0033] In some optional embodiments, the first locking assembly 221 includes a first support 2211, a first crank-connecting rod mechanism 2212, and a first clamping member 2213. The first support 2211 is fixedly connected to the frame 1, the first crank-connecting rod mechanism 2212 is rotatably connected to the first support 2211, and the first clamping member 2213 is connected to the output end of the first crank-connecting rod mechanism 2212.

[0034] Specifically, the first support 2211 is fixedly installed on the side of the positioning seat 21 by bolts, the first crank connecting rod mechanism 2212 is rotatably connected to the first support 2211 by a pin, and the first clamping member 2213 is fastened to the output end of the first crank connecting rod mechanism 2212 by screws. When the first crank connecting rod mechanism 2212 moves to the dead point position, the first clamping member 2213 remains in a clamping state to form a mechanical self-locking.

[0035] In this embodiment, the first crank-connecting rod mechanism 2212 rotates relative to the first support 2211, which can drive the first clamping member 2213 to move closer to or further away from the differential pressure pipe 100, which is beneficial to realize the automatic clamping and loosening of the pipe. The crank-connecting rod mechanism reaches the dead point position to form a self-locking structure, which can maintain the clamping state of the first clamping member 2213 under the condition of gas source pressure fluctuation or gas cut-off, which is beneficial to prevent the differential pressure pipe 100 from loosening and slipping during bending.

[0036] In some optional embodiments, the second locking assembly 222 includes a second support 2221, a second crank-connecting rod mechanism 2222, and a second clamping member 2223. The second support 2221 is fixedly connected to the frame 1, the second crank-connecting rod mechanism 2222 is rotatably connected to the second support 2221, and the second clamping member 2223 is connected to the output end of the second crank-connecting rod mechanism 2222.

[0037] Specifically, the second support 2221 is fixedly installed in the frame 1 area above the positioning groove 211 by bolts. The second crank connecting rod mechanism 2222 is rotatably connected to the second support 2221 by a pin. The second clamping member 2223 is fastened to the output end of the second crank connecting rod mechanism 2222. When the second crank connecting rod mechanism 2222 moves to the limit dead point position, the second clamping member 2223 stably maintains the downward locking state and forms a mechanical self-locking.

[0038] In this embodiment, the second crank-connecting rod mechanism 2222 rotates and swings relative to the second support 2221, which can drive the second clamping member 2223 to vertically lift and lower, thereby achieving the clamping and loosening of the differential pressure tube 100, which is suitable for the needs of pipe clamping operations. Relying on the dead-point self-locking characteristic of the second crank-connecting rod mechanism 2222, the clamping constraint force can be maintained continuously under bending conditions of equipment vibration and unstable air pressure. It can work with the positioning groove 211 to firmly fit the limiting differential pressure tube 100, effectively suppressing the vertical displacement caused by the bending springback of the pipe, which is conducive to further improving the overall positioning stability of the pipe during bending.

[0039] In some optional embodiments, the first locking assembly 221 further includes a first anti-slip rubber pad disposed on the pressing surface of the first pressing member 2213.

[0040] Specifically, the first anti-slip rubber pad is fixed to the pressing working surface of the first pressing member 2213 by adhesive bonding. The first anti-slip rubber pad completely covers the contact area between the first pressing member 2213 and the differential pressure tube 100, moves synchronously with the first pressing member 2213 and fits against the outer wall of the differential pressure tube 100.

[0041] In this embodiment, by adding a first anti-slip rubber pad to the pressing surface of the first clamping member 2213, the contact friction between the clamping member and the wall of the differential pressure tube 100 can be increased, which helps to avoid micro-slippage during the clamping process of the tube. At the same time, the rubber pad has flexible buffering characteristics, which can prevent metal hard contact, squeezing, scratching, and crushing of the outer wall of the differential pressure tube 100, which helps to protect the appearance of the tube and the integrity of the tube wall structure.

[0042] In some optional embodiments, the second locking assembly 222 further includes a second anti-slip rubber pad disposed on the pressing surface of the second pressing member 2223.

[0043] Specifically, the second anti-slip rubber pad is fixed to the pressing working surface of the second pressing member 2223 by adhesive bonding. The second anti-slip rubber pad completely covers the contact area between the second pressing member 2223 and the differential pressure tube 100, and can be pressed down synchronously with the second pressing member 2223 and adhere to the upper outer wall of the differential pressure tube 100.

[0044] In this embodiment, by placing a second anti-slip rubber pad on the pressing surface of the second clamping member 2223, the contact friction between the pipe and the clamping member under vertical clamping conditions can be increased, effectively offsetting the vertical micro-displacement caused by the bending and springback of the pipe and preventing the pipe from loosening. At the same time, by utilizing the flexible buffering performance of the rubber pad, the rigid clamping member is prevented from directly and rigidly squeezing the pipe wall, preventing indentations and deformation damage to the differential pressure pipe 100, and ensuring the appearance accuracy and structural integrity of the pipe.

[0045] In some alternative embodiments, the positioning groove 211 is a V-groove, the contour of which is adapted to the outer contour of the differential pressure tube 100.

[0046] Specifically, the V-groove is directly formed on the surface of the positioning seat 21. The inclined surfaces on both sides of the V-groove are arranged symmetrically. The included angle of the V-groove matches the outer diameter of the differential pressure tube 100. After the differential pressure tube 100 is placed, it can simultaneously contact and fit with the inclined surfaces on both sides of the V-groove.

[0047] In this embodiment, the inclined surfaces on both sides of the V-groove form a bidirectional support limit for the differential pressure tube 100, which can automatically center and position the tubular workpiece, and facilitates the rapid calibration of the placement center position of the differential pressure tube 100. The V-shaped structure can be adapted to round tubes with different outer diameters within a certain range, which helps to improve the workpiece compatibility of the device. At the same time, the multi-point contact support can disperse the pressure load on the tube and reduce the risk of local extrusion deformation.

[0048] In some optional embodiments, the differential pressure tube positioning dual-cylinder driven bending device with grating protection further includes a first nylon block and a second nylon block. The first nylon block is detachably connected to the piston rod output end of the first drive cylinder 31, and the second nylon block is detachably connected to the piston rod output end of the second drive cylinder 32.

[0049] Specifically, the first nylon block and the second nylon block are detachably locked onto the piston rod output end of the corresponding drive cylinder by bolts. The extrusion end faces of the first nylon block and the second nylon block are both arc-shaped fitting structures, which can move synchronously with the piston rod and contact the wall of the extrusion differential pressure tube 100.

[0050] This embodiment uses a detachable nylon block at the end of the cylinder piston rod to replace the metal in direct contact with the pipe during bending and extrusion, effectively avoiding the scratching and damage to the outer wall of the differential pressure pipe 100 by the hard piston rod. The detachable connection structure makes it easy to replace the nylon block separately according to the wear condition, without having to disassemble the entire drive structure 3, which helps to reduce equipment maintenance costs and repair difficulty.

[0051] In some optional embodiments, the first nylon block has a first arcuate contact surface, the second nylon block has a second arcuate contact surface, the radius of the arc of the first arcuate contact surface is greater than or equal to the outer diameter of the differential pressure tube 100, and the radius of the arc of the second arcuate contact surface is greater than or equal to the outer diameter of the differential pressure tube 100.

[0052] Specifically, the first arc-shaped contact surface is opened on the side of the first nylon block facing the differential pressure tube 100, and the second arc-shaped contact surface is opened on the side of the second nylon block facing the differential pressure tube 100. Both the first arc-shaped contact surface and the second arc-shaped contact surface are concave arc surfaces, and the arc contour can fit in large area with the outer wall of the differential pressure tube 100.

[0053] In this embodiment, the arc-shaped contact surface forms a surface contact and compression with the outer wall of the differential pressure tube 100, which can disperse the contact load during bending and avoid local stress concentration that could cause the tube to dent. The radius of the arc is not less than the outer diameter of the differential pressure tube 100, which can ensure that the contact area fits fully during bending operations, which is beneficial to improving the stability of bending stress and reducing the probability of indentations on the surface of the tube.

[0054] In some optional embodiments, the grating protection assembly includes a grating sensor and a signal processor. The grating sensor is symmetrically arranged on both sides of the bending area of ​​the frame 1.

[0055] Specifically, the grating sensor is symmetrically fixed in the bending operation area of ​​the frame 1 by bolts. The detection optical path of the grating sensor runs horizontally through the bending operation area. The grating sensor is electrically connected to the signal processor, which is integrated into the electrical control box of the frame 1.

[0056] This embodiment forms a complete safety monitoring light curtain by symmetrically arranged grating sensors on both sides, which can fully cover the dangerous area of ​​bending operations without any blind spots, and is conducive to accurately identifying personnel who accidentally enter the area. The signal processor receives and analyzes the monitoring signals of the grating sensors in real time, and can quickly output a stop command when foreign objects are detected to block the light curtain, which helps to shorten the equipment response time and improve the sensitivity and reliability of the equipment's safety protection.

[0057] In some optional embodiments, the differential pressure tube positioning dual-cylinder driven bending device with grating protection also includes a pneumatic control unit, which is connected to the first drive cylinder 31 and the second drive cylinder 32 respectively.

[0058] Specifically, the pneumatic control unit is fixedly installed in the side mounting area of ​​the frame 1. The pneumatic control unit is connected to the air passage interface of the first drive cylinder 31 and the second drive cylinder 32 through air pipes, and can independently control the intake, exhaust and extension / retraction of the two sets of drive cylinders.

[0059] This embodiment uses an independently set pneumatic control unit to uniformly manage the air circuit of the two cylinders, which can accurately control the extension and retraction speed and output pressure of the first drive cylinder 31 and the second drive cylinder 32 respectively, which is beneficial to adapting to the bending process requirements of the differential pressure tube 100. At the same time, the centralized air circuit control structure can realize the independent start and stop operation of the two cylinders, avoid mutual interference between the two sets of cylinders, and effectively ensure the orderly and stable progress of the multi-directional bending process.

[0060] In some optional embodiments, the pneumatic control unit includes a start button, a cylinder sequence control module, and a pressure regulating valve. The start button is located at the operating end of the frame 1. The cylinder sequence control module is connected to the first drive cylinder 31 and the second drive cylinder 32 respectively. The pressure regulating valve is connected to the air supply circuit of the first drive cylinder 31 and the second drive cylinder 32.

[0061] Specifically, the start button is embedded and fixed in the front operating area of ​​the frame 1, making it easy for the operator to press and control it at close range; the cylinder sequence control module is integrated into the internal air circuit of the pneumatic control unit, and is connected to the first drive cylinder 31 and the second drive cylinder 32 respectively through air circuit lines; the pressure regulating valve is connected in series to the total air supply circuit of the two sets of drive cylinders, and can adjust the air supply pressure in real time.

[0062] This embodiment uses a start button to centrally control the start and stop of the equipment, simplifying the operation process and improving ease of use. The cylinder sequence control module precisely manages the timing of the actions of the two sets of cylinders, avoiding missynchronous action of the two cylinders that could cause pipe bending failure and ensuring the orderly progress of multi-directional bending processes. The pressure regulating valve can adjust the air supply pressure according to the diameter and material of the differential pressure pipe, precisely controlling the bending force, which is beneficial for processing pipes of different specifications and improving the equipment's processing versatility and bending accuracy.

[0063] This application aims to protect a differential pressure tube positioning dual-cylinder driven bending device with grating protection. This technical solution uses a positioning groove 211 and a locking assembly 22 to engage and lock the differential pressure tube 100 to be bent, suppressing positional displacement caused by springback during bending and helping to maintain a stable processing reference for the tube. Through a first driving cylinder 31 and a second driving cylinder 32 with piston rods arranged perpendicularly to each other within the driving structure 3, each cylinder can drive its own piston rod to move towards the differential pressure tube 100 and perform bending, enabling bending without disassembling the tube. Under the premise of installing pipe fittings, bending in different directions can be completed, which helps to reduce positioning errors caused by multiple clamping and improve the processing efficiency and forming quality of multi-segment bending. With the help of the grating protection component arranged on the frame 1, when the grating protection component detects a person approaching the bending operation area, it can control the first drive cylinder 31 and the second drive cylinder 32 to stop. It can accurately identify dangerous working conditions where personnel illegally approach and brake the equipment in time. While ensuring bending processing capacity, it effectively avoids the safety risks caused by personnel entering the bending area and greatly improves the safety and reliability of equipment operation.

[0064] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this application and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this application should be included within the protection scope of this application. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A differential pressure tube positioning dual-cylinder driven bending device with grating protection, characterized in that, It includes a frame (1), a positioning and locking mechanism (2), a drive structure (3), and a grating protection assembly; The positioning and locking mechanism (2) includes a positioning seat (21) and a locking component (22). The positioning seat (21) and the locking component (22) are both mounted on the frame (1). The locking component (22) is configured to lock the differential pressure tube (100) to be bent. The positioning seat (21) has a positioning groove (211). The positioning groove (211) is configured to engage with the differential pressure tube (100). The drive structure (3) includes a first drive cylinder (31) and a second drive cylinder (32). Both the first drive cylinder (31) and the second drive cylinder (32) are mounted on the frame (1). The extension and retraction direction of the piston rod of the first drive cylinder (31) is perpendicular to the extension and retraction direction of the piston rod of the second drive cylinder (32). The first drive cylinder (31) is configured to drive its own piston rod to move toward the differential pressure tube (100) and bend the differential pressure tube (100). The second drive cylinder (32) is configured to drive its own piston rod to move toward the differential pressure tube (100) and bend the differential pressure tube (100). The grating protection component is mounted on the frame (1). The grating protection component is configured to control the first drive cylinder (31) and the second drive cylinder (32) to stop operating when a human body is detected approaching the bending operation area.

2. The differential pressure tube positioning dual-cylinder driven bending device with grating protection according to claim 1, characterized in that, The locking assembly (22) includes a first locking assembly (221) and a second locking assembly (222); both the first locking assembly (221) and the second locking assembly (222) are disposed on the positioning seat (21), the positioning groove (211) is used to engage with one side of the differential pressure tube (100), the second locking assembly (222) is used to abut with the other side of the differential pressure tube (100) opposite to the positioning groove (211), the second locking assembly (222) applies a clamping force to the differential pressure tube (100) in the vertical direction, and the first locking assembly (221) applies a clamping force to the differential pressure tube (100) in the horizontal direction.

3. The differential pressure tube positioning dual-cylinder driven bending device with grating protection according to claim 2, characterized in that, The first locking assembly (221) includes a first support (2211), a first crank-connecting rod mechanism (2212), and a first clamping member (2213). The first support (2211) is fixedly connected to the frame (1), the first crank-connecting rod mechanism (2212) is rotatably connected to the first support (2211), and the first clamping member (2213) is connected to the output end of the first crank-connecting rod mechanism (2212); and / or, The second locking assembly (222) includes a second support (2221), a second crank-connecting rod mechanism (2222), and a second clamping member (2223). The second support (2221) is fixedly connected to the frame (1), the second crank-connecting rod mechanism (2222) is rotatably connected to the second support (2221), and the second clamping member (2223) is connected to the output end of the second crank-connecting rod mechanism (2222).

4. The differential pressure tube positioning dual-cylinder driven bending device with grating protection according to claim 3, characterized in that, The first locking assembly (221) further includes a first anti-slip rubber pad, which is disposed on the pressing surface of the first pressing member (2213); and / or, The second locking assembly (222) further includes a second anti-slip rubber pad, which is disposed on the pressing surface of the second pressing member (2223).

5. The differential pressure tube positioning dual-cylinder driven bending device with grating protection according to claim 1, characterized in that, The positioning groove (211) is a V-shaped groove, and the contour of the V-shaped groove is adapted to the outer contour of the differential pressure tube (100).

6. The differential pressure tube positioning dual-cylinder driven bending device with grating protection according to claim 1, characterized in that, It also includes a first nylon block and a second nylon block, wherein the first nylon block is detachably connected to the piston rod output end of the first drive cylinder (31), and the second nylon block is detachably connected to the piston rod output end of the second drive cylinder (32).

7. The differential pressure tube positioning dual-cylinder driven bending device with grating protection according to claim 6, characterized in that, The first nylon block has a first arc-shaped contact surface, and the second nylon block has a second arc-shaped contact surface. The radius of the arc of the first arc-shaped contact surface is greater than or equal to the outer diameter of the differential pressure tube (100), and the radius of the arc of the second arc-shaped contact surface is greater than or equal to the outer diameter of the differential pressure tube (100).

8. The differential pressure tube positioning dual-cylinder driven bending device with grating protection according to any one of claims 1 to 7, characterized in that, The grating protection assembly includes a grating sensor and a signal processor. The grating sensor is symmetrically arranged on both sides of the bending area of ​​the frame (1) and is mounted on the frame (1).

9. The differential pressure tube positioning dual-cylinder driven bending device with grating protection according to any one of claims 1 to 7, characterized in that, It also includes a pneumatic control unit, which is connected to the first drive cylinder (31) and the second drive cylinder (32) respectively.

10. The differential pressure tube positioning dual-cylinder driven bending device with grating protection according to claim 9, characterized in that, The pneumatic control unit includes a start button, a cylinder sequence control module, and a pressure regulating valve. The start button is located at the operating end of the frame (1). The cylinder sequence control module is connected to the first drive cylinder (31) and the second drive cylinder (32) respectively. The pressure regulating valve is connected to the air supply circuit of the first drive cylinder (31) and the second drive cylinder (32).

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