Expanding machine for metal corrugated pipe of oil conservator

Abstract

The utility model relates to an oil conservator metal corrugated pipe expanding machine which comprises a base and vertical frames symmetrically arranged on the two sides of the base, a main oil cylinder with a vertically upward piston rod is installed on the base, and a supporting sleeve is perpendicularly connected to the base. The top of the supporting sleeve is provided with a supporting edge, the supporting edge is connected with a male die mechanism capable of conducting elastic deformation through a supporting frame, and the two vertical frames are each provided with a clamping mechanism which is arranged in an opposite mode, transversely moves and is matched with the male die mechanism. Tray racks which are vertically penetrated by the supporting sleeve and used for driving the corrugated pipe to ascend and descend are connected to the positions, on the two sides of the supporting sleeve, of the base through lead screw nut lifting mechanisms correspondingly, and a piston rod of the main oil cylinder sequentially penetrates through the supporting sleeve, the supporting frame and the male die mechanism and is connected with a conical tower capable of being matched with the male die mechanism through a pull rod. Corrugated pipes machined through the corrugated pipe machining device are even in wave pitch, waveform is not prone to distortion, position accuracy is high, automatic operation is achieved, production efficiency is improved, and production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe expansion technology, specifically to an expansion machine for metal corrugated pipes in oil storage tanks. Background Technology

[0002] Because most corrugated pipes for oil storage tanks in the industry are formed using a simple mechanical expansion method, which is a single-wave forming method, the wave pitch is controlled by manual alignment or by observing the scale lines. This results in uneven wave pitch and distorted waveforms, low positional accuracy, heavy reliance on manual labor and personal experience, and the need for multiple workers to assist in the operation, which increases labor costs. To address these issues, we propose a new type of expansion machine mechanism for metal corrugated pipes for oil storage tanks. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a metal corrugated tube expansion machine for oil storage tanks. It can utilize limit switches and wire displacement sensors to configure the stroke of each component, thereby achieving automated and high-precision expansion forming of corrugated tubes, improving production efficiency while reducing production costs.

[0004] This utility model is achieved through the following technical solution:

[0005] A metal corrugated tube expansion machine for oil storage tanks is provided, including a base and uprights symmetrically arranged on both sides of the base. A main hydraulic cylinder with a piston rod pointing vertically upward is installed on the base. A support sleeve is vertically connected to the base. A support edge is provided at the top of the support sleeve, and a punch mechanism that can be elastically deformed is connected to the support edge through a support frame. Clamping mechanisms that are arranged opposite each other and move laterally to cooperate with the punch mechanism are respectively installed on the two uprights. On both sides of the support sleeve, a pallet frame that is vertically penetrated by the support sleeve and used to drive the corrugated tube to rise and fall is connected to the base through a screw and nut lifting mechanism. The piston rod of the main hydraulic cylinder passes through the support sleeve, the support frame and the punch mechanism in sequence, and is connected to a conical tower that can cooperate with the punch mechanism through a tie rod.

[0006] Furthermore, the lead screw and nut lifting mechanism includes a lead screw and a guide rod arranged parallel to the lead screw. The two ends of the lead screw are rotatably installed between the base and the support edge, respectively. The two ends of the guide rod are fixed between the base and the support edge, respectively. The lead screw and the pallet frame are threadedly connected, and the guide rod and the pallet frame are slidably connected. It also includes a drive box that is sleeved and fixed on the support sleeve and has a drive motor installed inside. The two lead screws pass through the drive box and are located inside the drive box. Worm gears are installed at the same height on the lead screws. A worm gear that meshes with the worm gears is rotatably installed in the drive box through a support. The output shaft of the drive motor is connected to one end of the worm gear through a coupling.

[0007] The worm gear is driven by a drive motor to rotate, and the worm gear drives two lead screws to rotate. With the guidance of the guide rod, the pallet frame on the motor-driven lead screw can move vertically. The pallet frame can then drive the tube on it to rise and fall, and cooperate with the punch mechanism to achieve pressure forming, realizing top-to-bottom corrugated processing and improving processing efficiency.

[0008] Furthermore, the clamping mechanism includes clamping blocks and clamping cylinders. Two clamping blocks are arranged at the top and bottom, both connected to the movable seat. The movable seat is slidably connected to the upper part of the upright frame through guide rails and sliders. The lower end of the upper clamping block has an upper clamping plate that is arc-shaped and directly opposite the punch mechanism, which is located along its length. The upper end of the lower clamping block has a lower clamping plate that is arc-shaped and directly opposite the punch mechanism, which is located along its length. A deformation space is formed between the two clamping plates. The clamping cylinder is installed on one side of the movable seat, and the end of its piston rod is perpendicularly connected to the movable seat.

[0009] The clamping mechanism drives the clamping block to move synchronously through the extension and retraction of the clamping cylinder. During the expansion process, the clamping plates on the clamping block are used to clamp and position the pipe to prevent the pipe from shifting or twisting during expansion. The deformation space between the upper and lower clamping plates is used to squeeze and accommodate the deformed part of the pipe when the punch protrudes, ensuring the stability of the corrugation process.

[0010] Furthermore, the support frame is equipped with two limit switches in the moving direction of the moving seat to control the extension and retraction stroke of the clamping cylinder, and corresponding contact pieces are installed on the moving seat to cooperate with the triggering of the two limit switches.

[0011] A limit switch is installed on the upright frame, which, together with the contact plate on the movable seat, can effectively control the extension and retraction stroke of the clamping cylinder, ensuring the clamping stability of the clamping mechanism.

[0012] Furthermore, the punch mechanism includes a lower punch ring seat connected to the top of the support frame, and a punch set on the lower punch ring seat. The punch is formed by splicing several punch units. Each punch unit has a connecting part on its surface and is connected to a return spring that is connected end to end through the connecting part. Each punch unit is connected to a corresponding sliding seat. The bottom surface of the sliding seat is provided with a mounting groove and a sliding block is engaged in the mounting groove. The lower punch ring seat is provided with a slide rail located on the axis of each punch unit and slidingly engaged with the sliding block.

[0013] The punch mechanism expands the tube by using multiple punch units that are movable on the lower ring seat of the punch. When the cone tower is pressed down, it squeezes the sliding seat. When the sliding seat slides along the slide rail, it drives each punch unit to extend. At the same time, the return spring deforms and has elastic potential energy. After the expansion is completed, the cone tower rises and the elastic potential energy drives each punch unit to move back to the initial position along the slide rail in the opposite direction, so that it can be used for the next expansion.

[0014] Furthermore, each sliding seat has an inclined surface on the side facing away from the punch unit that matches the conical surface of the cone.

[0015] The sliding seat has an inclined surface that matches the conical surface of the cone tower, which facilitates the application of force to the sliding seat when the cone tower is pressed down, and ensures that the force is evenly applied to the sliding seat so that it can drive each punch unit to move stably.

[0016] Furthermore, the lower ring seat of the punch is connected to the upper ring seat of the punch located directly above the punch via a vertical support rod. A wire displacement sensor for controlling the extension and retraction stroke of the main hydraulic cylinder is installed between the upper ring seat of the punch and the top of the cone tower. A limit switch for controlling the extension and retraction stroke of the main hydraulic cylinder is installed inside the cone tower. The contacts of the limit switch extend out of the side of the cone tower and can contact and cooperate with the inner wall of the upper ring seat of the punch.

[0017] An upper ring seat for the punch is installed above the lower ring seat, placing the punch between the two ring seats to prevent dust from entering the punch. At the same time, a wire displacement sensor installed between the upper ring seat for the punch and the top of the cone tower can measure the displacement distance of the cone tower to ensure the consistency of the cone tower's displacement in each movement. In conjunction with the limit switch installed inside the cone tower, the stability of the cone tower's movement can be increased, serving as an auxiliary safety control measure. This also helps to prevent inaccurate cone tower displacement when the wire displacement sensor fails, effectively avoiding accidents.

[0018] Furthermore, the upper annular edge of the pallet frame is provided with a raised edge for supporting the end of the corrugated pipe, and a limiting post is vertically provided on the raised edge for abutting against the inner wall of the corrugated pipe.

[0019] The upper part of the pallet frame is equipped with a raised edge and a limiting post on the raised edge, which can limit the lower part of the corrugated pipe, effectively ensuring the stability of the pipe to be processed during processing, preventing it from falling off the pallet frame, and ensuring the stability of the expansion during processing.

[0020] Furthermore, fixed arms are connected to both ends of the two uprights, and the fixed arms on the same side of the two uprights are connected together by reinforcing rods.

[0021] Fixed arms are installed at both ends of the two uprights, and the fixed arms are connected as one unit by reinforcing rods to increase the stability of the two uprights and enhance the overall stability.

[0022] Furthermore, a wire displacement sensor for controlling the displacement of the lead screw nut lifting mechanism is connected between the base and the tray frame.

[0023] A pull-wire displacement sensor is installed between the base and the pallet frame to measure the movement distance of the lead screw and nut lifting mechanism. This ensures that the displacement of the lead screw and nut lifting mechanism in each drive of the pallet frame is consistent, thereby making the tube expansion processing more precise.

[0024] The beneficial effects of this utility model are:

[0025] This invention utilizes a clamping mechanism to clamp and position the pipe. The main hydraulic cylinder drives the conical tower to move downwards, applying force to each punch unit. The increased overall deformation of the punches exerts force on the inner wall of the pipe, controlling its deformation to achieve a corrugated structure. A lead screw and nut lifting mechanism raises the pallet frame, allowing the pipe on the pallet frame to be corrugated step-by-step from top to bottom. The overall operation is simple. Limit switches and wire displacement sensors control the displacement of each moving part, ensuring processing accuracy and enabling automated production. This improves the efficiency of corrugated pipe processing, resulting in corrugated pipes with uniform pitch, minimal waveform distortion, and high positional accuracy. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0027] Figure 2 for Figure 1 Side view.

[0028] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0029] Figure 4 This is a schematic diagram of the installation of the punch mechanism and the clamping mechanism in this utility model.

[0030] Figure 5 This is a schematic diagram of the installation structure of the lead screw nut lifting mechanism and the pallet frame in this utility model.

[0031] Figure 6 This is a schematic diagram of the punch mechanism in this utility model.

[0032] Figure 7 This is a schematic diagram of the punch unit in this utility model.

[0033] As shown in the figure:

[0034] 1. Base, 2. Drive box, 3. Pallet frame, 4. Punch mechanism, 5. Stand, 6. Conical tower, 7. Support sleeve, 8. Main cylinder, 9. Clamping cylinder, 10. Tie rod, 11. Screw and nut lifting mechanism, 12. Guide rod, 13. Screw, 14. Hydraulic station, 15. Control cabinet, 16. Reinforcing rod, 17. Support frame, 18. Lower ring seat of punch, 19. Limiting post, 20. Clamping block, 21. Upper clamping plate, 22. Fixed arm, 23. Upper ring seat of punch, 24. Moving seat, 25. Deformation space, 26. Punch unit, 27. Slide rail, 28. Sliding seat, 29. Sliding block, 30. Drive motor, 31. Worm gear, 32. Drive box, 33. Return spring, 34. Mounting slot. Detailed Implementation

[0035] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0036] like Figure 1 As shown, an expansion machine for metal corrugated pipes of oil storage tanks includes a base 1 and uprights 5 symmetrically arranged on both sides of the base 1. Fixed arms 22 are connected to both ends of the two uprights 5 respectively, and the fixed arms 22 on the same side of the two uprights 5 are connected together by a reinforcing rod 16.

[0037] A main hydraulic cylinder 8 with a vertically upward piston rod is mounted on the base 1. A support sleeve 7 is vertically connected to the base 1. A support edge is provided on the top of the support sleeve 7, and a flexible punch mechanism 4 is connected to the support edge via a support frame 17. Two uprights 5 are respectively equipped with clamping mechanisms that are arranged opposite each other and move laterally to cooperate with the punch mechanism 4. On both sides of the support sleeve 7, a tray frame 3 is connected to the base 1 via a screw nut lifting mechanism 11. The tray frame 3 is vertically penetrated by the support sleeve 7 and is used to drive the bellows to rise and fall. The annular edge of the upper part of the tray frame 3 is provided with a protrusion for supporting the end of the bellows. A limiting post 19 is vertically provided on the protrusion for abutting against the inner wall of the bellows. A pull wire displacement sensor is connected between the base 1 and the tray frame 3 to control the displacement of the screw nut lifting mechanism 11.

[0038] The piston rod of the main cylinder 8 passes through the support sleeve 7, the support frame 17 and the punch mechanism 4 in sequence, and is connected to the cone tower 6, which can cooperate with the punch mechanism 4, via the tie rod 10.

[0039] like Figure 5 As shown, the lead screw nut lifting mechanism 11 includes a lead screw 13 and a guide rod 12 arranged parallel to the lead screw 13. The two ends of the lead screw 13 are rotatably installed between the base 1 and the support edge, respectively. The two ends of the guide rod 12 are fixed between the base 1 and the support edge, respectively. The lead screw 13 is threadedly connected to the pallet frame 3, and the guide rod 12 is slidably connected to the pallet frame 3. It also includes a drive box 32 sleeved and fixed on the support sleeve 7 and with a drive motor 30 installed inside. The two lead screws 13 pass through the drive box 32 and are located inside the drive box 32. Worm gears are installed at the same height on the lead screws 13. A worm 31 that meshes with the worm gears is rotatably installed in the drive box 32 through a support. The output shaft of the drive motor 30 is connected to one end of the worm 31 through a coupling.

[0040] like Figure 3As shown, the clamping mechanism includes a clamping block 20 and a clamping cylinder 9. Two clamping blocks 20 are arranged at the top and bottom and are connected to the movable seat 24. The movable seat 24 is slidably connected to the upper part of the upright frame 5 through a guide rail and a slider. The lower end of the upper clamping block has an upper clamping plate that is arc-shaped and directly opposite the punch mechanism 4 along its length direction. The upper end of the lower clamping block has a lower clamping plate that is arc-shaped and directly opposite the punch mechanism 4 along its length direction. A deformation space 25 is formed between the two clamping plates. The clamping cylinder 9 is installed on one side of the movable seat 24 and its piston rod end is perpendicularly connected to the movable seat 24.

[0041] To ensure the accuracy of the displacement of the clamping cylinder 9 and to achieve automated clamping, the frame 5 is equipped with two limit switches in the moving direction of the moving seat to control the extension and retraction of the clamping cylinder 9. The moving seat 24 is equipped with corresponding contact pieces for triggering the two limit switches.

[0042] like Figure 4 and Figure 6 As shown, the punch mechanism 4 includes a punch lower ring seat 18 connected to the top of the support frame 17, and a punch disposed on the punch lower ring seat 18. The punch is formed by splicing together several punch units 26. Each punch unit 26 has a connecting part on its surface and is connected to a return spring 33 connected end to end through the connecting part. Each punch unit 26 is connected to a corresponding sliding seat 28. The side of each sliding seat 28 facing away from the punch unit 26 has a sloping surface that matches the conical surface of the cone tower 6.

[0043] The bottom surface of the sliding seat 28 is provided with an installation groove and a sliding block 29 is engaged in the installation groove. The punch lower ring seat 18 is provided with a slide rail 27 located on the axis of each punch unit 26 and slidingly engaged with the sliding block 29.

[0044] The lower ring seat 18 of the punch is connected to the upper ring seat 23 of the punch, which is located directly above the punch, through a vertical support rod. A wire displacement sensor for controlling the extension and retraction stroke of the main oil cylinder 8 is installed between the upper ring seat 23 of the punch and the top of the cone tower 6. A limit switch for controlling the extension and retraction stroke of the main oil cylinder 8 is installed inside the cone tower 6. The contact of the limit switch extends out of the side of the cone tower 6 and can contact and cooperate with the inner wall of the upper ring seat 23 of the punch.

[0045] In this embodiment, both the main cylinder 8 and the clamping cylinder 9 are connected to a hydraulic station 14, which provides them with power. To facilitate automated control, a control cabinet 15 can be designed. A PLC controller and control circuit are used to electrically connect to the wire displacement sensor, limit switch and hydraulic station 14 respectively, thereby achieving coordinated control of each part, so that they cooperate with each other to automatically complete the expansion processing of the bellows.

[0046] The working process of this utility model:

[0047] The pipe to be processed is placed on the pallet frame 3, with the lower end of the pipe fitted onto a ring of limiting posts 19 on the raised edge of the pallet frame 3. Then, the drive motor 30 drives the worm gear 31 to rotate, which in turn drives the worm wheel to rotate, thereby driving the two lead screws 13 to rotate. Under the guidance and limiting action of the guide rod 12, the pallet frame 3 is driven by the lead screws 13 to move upward a fixed distance to the punch position. At this time, the clamping cylinder 9 is activated, and the piston rod of the clamping cylinder 9 extends and drives the clamping block 20 to approach the pipe through the moving seat 24. The clamping plates on the two clamping blocks 20 use their arc edges to fit against the outer wall of the pipe for clamping and positioning. Then, the piston rod of the main cylinder 8 drives the conical tower 6 to move downward. When the conical tower 6 moves downward, its conical surface squeezes... When the sliding seat 28 is pressed, the sliding block 29 and the slide rail 27 cooperate with each other, which allows the sliding seat 28 to drive each punch unit 26 to extend outward. The edge of the punch unit 26 squeezes the inner wall of the tube, causing the tube to expand into a wave. The deformed part of the tube is in the deformation space 25 between the two clamping plates, ensuring the stability of the expansion. When the punch unit 26 extends, the return spring 33 on its top surface deforms and generates elastic potential energy. After the cone tower 6 is pressed down to the position, the main oil cylinder 8 controls the cone tower 6 to move in the opposite direction back to the initial position. At this time, when the force on the return spring 33 is less than its elastic force, the return spring 33 drives each punch unit 26 to move in the opposite direction back to the initial position through the elastic force, so as to wait for the next expansion to start.

[0048] After one expansion cycle, the piston rod of the clamping cylinder 9 retracts, causing the clamping block 20 and clamping plate to retract as well. At this time, the screw nut lifting mechanism 11 controls the pallet frame 3 to move upward by the same distance again, thereby moving the pipe upward by a fixed distance. Then, the piston rod of the clamping cylinder 9 extends, causing the clamping block 20 and clamping plate to extend, clamping and positioning the pipe again. Then, the main cylinder 8 moves the conical tower 6 downward. By applying force to each punch unit 26 using its conical surface again and repeating the above steps, the expansion corrugation processing of the pipe from top to bottom can be achieved.

[0049] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. An oil tank metal bellows bulging machine comprising a base and a stand symmetrically arranged on both sides of the base, characterized in that: The base is provided with a main oil cylinder with a piston rod vertically upward, and a support sleeve is vertically connected to the base. A support ridge is arranged on the top of the support sleeve, and an elastically deformable punch mechanism is connected to the support ridge through a support frame. Two stands are respectively provided with clamping mechanisms which are oppositely arranged and horizontally move to cooperate with the punch mechanism. The base is provided with tray frames which are vertically penetrated by the support sleeve and used to drive the corrugated pipe to move up and down through screw nut lifting mechanisms on both sides of the support sleeve. The piston rod of the main oil cylinder penetrates the support sleeve, the support frame and the punch mechanism in sequence and is connected to a cone tower which can cooperate with the punch mechanism through a pull rod.

2. The oil reservoir metal bellows bulge former according to claim 1, characterized in that: The screw nut lifting mechanism comprises a screw rod and a guide rod which is arranged in parallel with the screw rod. The two ends of the screw rod are respectively rotatably installed between the base and the support ridge. The two ends of the guide rod are respectively fixed between the base and the support ridge. The screw rod is threadedly connected with the tray frame, and the guide rod is slidably connected with the tray frame. The driving box is fixedly arranged on the support sleeve and internally provided with a driving motor. The two screw rods penetrate the driving box, and the screw rods in the driving box are respectively provided with worm wheels at the same height. A worm is rotatably installed in the driving box through a support and is in meshing transmission with the worm wheels. The output shaft of the driving motor is connected with one end of the worm through a shaft coupling.

3. The oil reservoir metal bellows bulge former according to claim 1, wherein: The clamping mechanism comprises clamping blocks and clamping oil cylinders. The clamping blocks are arranged above and below a moving seat and are connected to the moving seat. The moving seat is slidably connected with the upper part of the stand through a guide rail and a sliding block. The lower end of the upper clamping block is protrudingly provided with an upper clamping plate which is opposite to the punch mechanism and is arc-shaped along the length direction of the upper clamping block. The upper end of the lower clamping block is protrudingly provided with a lower clamping plate which is opposite to the punch mechanism and is arc-shaped along the length direction of the lower clamping block. The two clamping plates form a deformation space therebetween. The clamping oil cylinder is installed on one side of the moving seat and is vertically connected with the moving seat through the piston rod end.

4. The oil reservoir metal bellows bulge former according to claim 3, wherein: The stand is provided with two travel switches in the moving direction of the moving seat for controlling the extension and retraction stroke of the clamping oil cylinder. The moving seat is correspondingly provided with contact pieces for triggering the two travel switches.

5. The oil reservoir metal bellows bulge former as set forth in claim 1, wherein: The punch mechanism comprises a punch lower ring seat connected to the top of the support frame and a punch arranged on the punch lower ring seat. The punch is formed by a plurality of punch units. The surface of each punch unit is provided with a connecting portion and is commonly connected to a reset spring through the connecting portion. Each punch unit is correspondingly connected to a sliding seat. The bottom surface of the sliding seat is provided with a mounting groove, and a sliding block is clamped in the mounting groove. The punch lower ring seat is correspondingly provided with a sliding rail for each punch unit. The sliding rail is located on the axis of each punch unit and is in sliding cooperation with the sliding block.

6. The oil reservoir metal bellows bulge former according to claim 5, wherein: The side of each sliding seat opposite to the punch unit is formed with an inclined surface matched with the conical surface of the cone tower.

7. The oil reservoir metal bellows bulge former as set forth in claim 5, wherein: The punch lower ring seat is connected to a punch upper ring seat located directly above the punch through a vertical support rod. A pull wire displacement sensor is installed between the punch upper ring seat and the top of the cone tower for controlling the extension and retraction stroke of the main oil cylinder. A limit switch is installed in the cone tower for controlling the extension and retraction stroke of the main oil cylinder. The contact of the limit switch protrudes from the side surface of the cone tower and can be in contact with the inner wall of the punch upper ring seat.

8. The oil reservoir metal bellows bulge former according to claim 1, wherein: The annular edge of the upper part of the tray frame is provided with a convex ridge for supporting the end of the corrugated pipe. A limiting column is vertically arranged on the convex ridge for abutting against the inner wall of the corrugated pipe.

9. The oil reservoir metal bellows bulge former as set forth in claim 1, wherein: Two ends of the two stands are respectively connected with fixed arms, and the fixed arms on the same side of the two stands are connected together through a reinforcing rod.

10. The oil reservoir metal bellows bulge former as set forth in claim 1, wherein: A pull wire displacement sensor for controlling displacement of the lead screw nut lifting mechanism is connected between the base and the tray rack.

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