Pipe drawing, spraying and polishing three-in-one pipe casting equipment

Abstract

The utility model belongs to the field of pipe fitting casting, and particularly relates to pipe drawing, spraying and polishing three-in-one pipe casting equipment which comprises a pipe casting mechanism, a feeding mechanism is arranged on the right side of the pipe casting mechanism, a rack is arranged on the left side of the pipe casting mechanism, a mounting plate is arranged on the rack, and the mounting plate is connected with the rack in a front-back sliding mode. A horizontal transposition mechanism is connected to the mounting plate, three parallel guide rails are connected to the mounting plate, a moving frame A, a moving frame B and a moving frame C are sequentially arranged on the three guide rails from inside to outside, and the moving frame A, the moving frame B and the moving frame C are connected with the guide rails in a left-right sliding mode; the movable frame A, the movable frame B and the movable frame C are respectively connected with a grinding mechanism, a spraying mechanism and a pipe drawing mechanism, and a cast pipe feeding mechanism is arranged below the grinding mechanism, the spraying mechanism and the pipe drawing mechanism on the rack; by means of the equipment, polishing and spraying of the pipe casting mechanism can be achieved, and pipe drawing operation can be conducted on pipe fittings cast in the pipe casting mechanism.

Description

Technical Field

[0001] The utility model belongs to the field of pipe casting, and in particular relates to a three-in-one pipe casting device which includes pipe drawing, spraying and polishing. Background Art

[0002] The pipe casting mechanism needs to grind and spray the inner wall of the pipe mold before casting. After the pipe casting is completed, the pipe cast in the pipe mold needs to be taken out. In the existing technology, the grinding and spraying of the inner wall of the pipe mold and the extraction of the cast pipe are all performed by workers holding related equipment, which is time-consuming, labor-intensive and inconvenient to operate. Utility Model Content

[0003] The purpose of the utility model is to solve the problems in the prior art, thereby providing a three-in-one pipe drawing, spraying and polishing casting equipment, through which not only the polishing and spraying of the pipe casting mechanism can be realized, but also the pipe drawing operation of the pipe fittings cast in the pipe casting mechanism can be performed, which saves time and effort and is easy to operate.

[0004] The purpose of the utility model is achieved as follows: a three-in-one pipe casting equipment for pipe drawing, spraying and polishing, comprising a pipe casting mechanism, a feeding mechanism is provided on the right side of the pipe casting mechanism, a frame is provided on the left side of the pipe casting mechanism, a mounting plate is provided on the frame, the mounting plate and the frame are slidably connected back and forth, a horizontal shifting mechanism is connected to the mounting plate, three parallel guide rails are connected to the mounting plate, and a movable frame A, a movable frame B and a movable frame C are sequentially provided on the three guide rails from the inside to the outside, the movable frame A, the movable frame B and the movable frame C are respectively connected to the guide rails for left and right sliding, the movable frame A, the movable frame B and the movable frame C are respectively connected to the polishing mechanism, the spraying mechanism and the pipe drawing mechanism, a pipe feeding mechanism is provided below the polishing mechanism, the spraying mechanism and the pipe drawing mechanism on the frame, and the pipe feeding mechanism is slidably connected to the frame left and right.

[0005] Furthermore, the horizontal displacement mechanism includes a horizontal adjustment screw connected between the mounting plates by a thread, and both ends of the horizontal adjustment screw are rotatably connected to the frame. The horizontal adjustment screw pushes the mounting plate to drive the three guide rails and the movable frame A, movable frame B and movable frame C on the guide rails to move forward or backward together, so as to realize the horizontal displacement of the grinding mechanism, spraying mechanism and pipe pulling mechanism.

[0006] Furthermore, the tube pulling mechanism includes a mounting seat fixedly connected to the movable frame C, a positioning rod is connected to the center of the mounting seat for sliding left and right, and a positioning plate is fixedly connected to the right end of the positioning rod. No less than three support rods are arranged around the positioning rod, and the support rods are evenly distributed around the positioning rod. The left end of the support rod is hinged on the mounting seat, and a torsion spring is connected at the hinge point between the support rod and the mounting seat. The left end of the positioning rod is connected to the piston rod of the hydraulic rod, and the pressure cylinder of the hydraulic rod is fixedly connected to the mounting seat. The hydraulic rod drives the positioning rod and the positioning plate to move left and right. The distance between the movable end of the support rod and the positioning rod can be adjusted by the support of the positioning plate and the coordinated reset of the torsion spring, and then the distance between the support rod and the inner wall of the pipe fitting can be adjusted to achieve the fixing and unlocking of the tube pulling mechanism and the pipe fitting as needed, thereby facilitating the tube pulling operation.

[0007] Furthermore, the positioning plate is a truncated cone structure with an outer end diameter larger than an inner end diameter, and the maximum diameter of the positioning plate is larger than the aperture of the inscribed circle between the struts, and the minimum diameter of the positioning plate is smaller than the aperture of the inscribed circle between the struts. When the hydraulic rod pushes the positioning plate to move to the rightmost end, the left end of the positioning plate is located in the central area of the strut. When the positioning plate moves to the left, there is no need to position the relative position of the positioning plate and the strut to prevent the movable end of the suspended strut from hindering the movement of the positioning plate. During the movement of the positioning plate, its obliquely arranged side surface can drive the movable end of the strut to gradually rotate in the direction away from the positioning rod.

[0008] Furthermore, a friction sleeve is fixedly connected to the outer surface of the support rod near the right end, which can increase the friction between the tube pulling mechanism and the inner wall of the pipe fitting, preventing the tube pulling mechanism from moving relative to the pipe fitting due to insufficient friction during the process of moving the pipe fitting together.

[0009] Furthermore, the feeding mechanism includes a feeding trolley, which moves left and right along the trolley track A. A material box is installed on the feeding trolley. The top of the material box is rotatably connected to the feeding trolley on the side close to the casting pipe mechanism. The material box is connected to a rotary drive mechanism, and then the rotary drive mechanism drives the material box to flip over so that the molten iron in the material box is fed into the casting pipe mechanism through the feeding port.

[0010] Furthermore, the cast pipe feeding mechanism includes a feeding trolley, which moves left and right along the trolley track B. The feeding trolley is provided with a plurality of lifting mechanisms along its length direction, and the lifting mechanisms can provide support for the pipe fittings.

[0011] Furthermore, the lifting mechanism includes a vertical lifting frame and a horizontal support shaft connected to the top of the vertical lifting frame. A proximity switch is provided on the left side of the lifting mechanism on the feeding trolley. When the pipe pulling mechanism drives the pipe to pass over a proximity switch, the horizontal support shaft corresponding to its right side moves upward under the push of the vertical lifting frame to provide support for the pipe passing over it.

[0012] Furthermore, two frustum-shaped support rollers are symmetrically arranged on the horizontal support axis, and the large diameter ends of the two support rollers are located at the end positions of the horizontal support axis. The support rollers at both ends of the horizontal support axis can limit the pipe fittings on the horizontal support axis to prevent the pipe fittings from rolling along the axial direction of the horizontal support axis.

[0013] Beneficial effects of the utility model:

[0014] 1. The utility model is equipped with a three-in-one mechanism of pipe drawing, spraying and polishing at the discharge port of the pipe casting mechanism. The polishing mechanism, spraying mechanism and pipe drawing mechanism are connected with a horizontal shifting mechanism. The mechanism staying on the working position can be switched through the horizontal shifting mechanism. This mechanism can not only realize the polishing and spraying of the pipe casting mechanism, but also the pipe drawing operation of the pipe fittings cast in the pipe casting mechanism, which saves time and effort and is easy to operate.

[0015] 2. The utility model is provided with a casting pipe feeding mechanism below the pipe pulling mechanism, through which the pipe fittings taken out from the casting pipe mechanism can be automatically fed into the corresponding material frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention 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 these drawings without paying any creative work.

[0017] Figure 1 The utility model is a structural schematic diagram of a three-in-one pipe casting equipment for pipe drawing, spraying and polishing.

[0018] Figure 2 This is a structural schematic diagram of a three-in-one pipe drawing, spraying and polishing equipment (the pipe drawing mechanism is shown separately) of the utility model.

[0019] Figure 3 This is a structural diagram of a three-in-one pipe casting equipment (the grinding mechanism is shown separately) of the utility model.

[0020] Figure 4This is a structural diagram of a three-in-one pipe drawing, spraying and polishing equipment (the spraying mechanism is shown separately) of the utility model.

[0021] Figure 5 The utility model is a schematic diagram of the top view of the structure of the transposition mechanism in the three-in-one pipe drawing, spraying and polishing casting equipment.

[0022] Figure 6 The utility model is a schematic diagram of the structure of a feeding trolley in a three-in-one pipe drawing, spraying and polishing casting equipment.

[0023] Figure 7 The utility model is a structural diagram of a pipe drawing mechanism in a three-in-one pipe drawing, spraying and polishing casting equipment.

[0024] Description of reference numerals:

[0025] 1. Pipe casting mechanism 2. Frame 4. Mobile frame A 5. Mobile frame B 6. Mobile frame C 7. Spraying mechanism 8. Grinding mechanism 9. Pipe pulling mechanism 10. Loading trolley 11. Trolley track A 12. Material box 13. Feeding trolley 14. Trolley track B 15. Lifting mechanism 16. Proximity switch 17. Vertical lifting frame 18. Horizontal support shaft 19. Support roller 20. Mounting plate 21. Horizontal adjustment screw 22. Guide rail 23. Mounting seat 24. Positioning rod 25. Positioning plate 26. Strut 27. Torsion spring 28. Hydraulic rod 29. Friction sleeve. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0029] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0031] In one embodiment of the present invention, Figure 1 As shown, a three-in-one pipe drawing, spraying and polishing casting equipment includes a pipe drawing mechanism 1, a feeding mechanism is provided on the right side of the pipe drawing mechanism 1, a frame 2 is provided on the left side of the pipe drawing mechanism, a transposition mechanism 3 is connected to the frame 2, and a mobile frame A4, a mobile frame B5 and a mobile frame C6 are provided on the transposition mechanism 3 from the inside to the outside, and the mobile frames A4, B5 and C6 are respectively connected to the transposition mechanism 3 for left and right sliding. The mobile frames A4, B5 and C6 are respectively connected to the polishing mechanism 8, the spraying mechanism 7 and the pipe drawing mechanism 9, and a pipe feeding mechanism is provided below the polishing mechanism 8, the spraying mechanism 7 and the pipe drawing mechanism 9 on the frame, and the pipe feeding mechanism is connected to the frame 1 for left and right sliding.

[0032] In one embodiment of the present invention, Figure 1As shown, a three-in-one pipe drawing, spraying and polishing casting equipment includes a pipe drawing mechanism 1, a feeding mechanism is provided on the right side of the pipe drawing mechanism 1, a frame 2 is provided on the left side of the pipe drawing mechanism 1, a mounting plate 20 is provided on the frame 2, the mounting plate 20 and the frame 2 are slidably connected back and forth, the mounting plate 20 is connected to a horizontal shifting mechanism, three parallel guide rails 22 are connected to the mounting plate 20, and the three guide rails 22 are sequentially provided with a movable frame A4, a movable frame B5 and a movable frame C6 from the inside to the outside, the movable frame A4, the movable frame B5 and the movable frame C6 are respectively slidably connected to the guide rails 22 left and right, the movable frame A1, the movable frame B2 and the movable frame C3 are respectively connected with a polishing mechanism 8, a spraying mechanism 7 and a pipe drawing mechanism 9, a pipe feeding mechanism is provided below the polishing mechanism 8, the spraying mechanism 7 and the pipe drawing mechanism 9 on the frame 2, and the pipe feeding mechanism is slidably connected to the frame 1 left and right.

[0033] In one embodiment of the present invention, Figure 1-4 As shown, the horizontal displacement mechanism includes a horizontal adjustment screw 21 connected between the mounting plates 20 by a thread, and both ends of the horizontal adjustment screw 21 are rotatably connected to the frame 2. The horizontal adjustment screw 21 pushes the mounting plate 20 to drive the three guide rails 22 and the movable frame A4, movable frame B5 and movable frame C6 on the guide rails 22 to move forward or backward together, so as to realize the horizontal displacement of the grinding mechanism 8, the spraying mechanism 7 and the pipe pulling mechanism 9.

[0034] In one embodiment of the present invention, the movable frame A4, movable frame B5 and movable frame C6 are respectively connected to linear motors, which drive the movable frame A4, movable frame B5, movable frame C6 and the grinding mechanism 8, spraying mechanism 7 and pipe pulling mechanism 9 to move left and right.

[0035] In one embodiment of the present invention, Figure 2 and Figure 7As shown, the tube pulling mechanism includes a mounting seat 23 fixedly connected to the mobile frame C6, a positioning rod 24 is connected to the center of the mounting seat 23 for sliding left and right, a positioning plate 25 is fixedly connected to the right end of the positioning rod 24, and no less than three struts 26 are arranged around the positioning rod 25, and the struts 26 are evenly distributed around the positioning rod 24, the left end of the strut 26 is hinged on the mounting seat 23, and a torsion spring 27 is connected at the hinge point between the strut 26 and the mounting seat 23, the left end of the positioning rod 24 is connected to the piston rod of the hydraulic rod 28, the pressure cylinder of the hydraulic rod 28 is fixedly connected to the mounting seat 23, and the hydraulic rod 28 drives the positioning rod 24 and the positioning plate 25 to move to the left along the axial direction of the positioning rod 24 through the piston rod, and the positioning plate 25 supports the positioning rod 24. Under the action of the spring 27, the movable end of the support rod 26 rotates in the direction away from the positioning rod 24, so that the movable end of the support rod 26 abuts against the inner surface of the pipe fitting, thereby realizing the fixation of the pipe fitting inside the pipe casting mechanism by the pipe pulling mechanism, so that the pipe fitting can be pulled out of the pipe casting mechanism through the movable frame C6, and the pulled-out pipe fitting is placed on the pipe casting feeding mechanism. Then the hydraulic cylinder 28 drives the positioning rod 24 and the positioning plate 25 to move to the right along the axis direction of the positioning rod 24 through the piston rod. After losing the supporting effect of the positioning plate, under the action of the torsion spring 27, the movable end of the support rod 26 rotates toward the positioning rod 24, so that the movable end of the support rod 26 is away from the inner surface of the pipe fitting, releasing the fixation of the pipe pulling mechanism and the pipe fitting, and finally the pipe pulling mechanism is moved out of the pipe fitting through the movable frame C6, which facilitates the pipe casting feeding mechanism to send the pipe fitting into the material frame.

[0036] In one embodiment of the present invention, Figure 7 As shown, the positioning disk 25 is a truncated cone structure with an outer end diameter larger than an inner end diameter, and the maximum diameter of the positioning disk 25 is larger than the aperture of the inscribed circle between the struts 26, and the minimum diameter of the positioning disk 25 is smaller than the aperture of the inscribed circle between the struts 26. When the hydraulic rod 28 pushes the positioning disk 25 to move to the rightmost end, the left end of the positioning disk 25 is located in the central area of the strut 26. When the positioning disk 25 moves to the left, there is no need to position the relative position of the positioning disk 25 and the strut 26 to prevent the movable end of the suspended strut 26 from hindering the movement of the positioning disk 25. During the movement of the positioning disk 25, its obliquely arranged side surface can drive the movable end of the strut 26 to gradually rotate in the direction away from the positioning rod 24.

[0037] In one embodiment of the present invention, Figure 7 As shown, a friction sleeve 29 is fixedly connected to the outer surface of the support rod 26 near the right end. The friction sleeve 29 can increase the friction between the tube pulling mechanism and the inner wall of the pipe fitting, thereby preventing the tube pulling mechanism from moving relative to the pipe fitting due to insufficient friction during the process of moving the pipe fitting together.

[0038] In one embodiment of the present invention, Figure 1 As shown, the feeding mechanism includes a feeding trolley 10, which moves left and right along the trolley track A11. A material box 12 is installed on the feeding trolley 10, and the top of the material box 12 is rotatably connected to the feeding trolley 10 on the side close to the casting pipe mechanism 1. The material box is connected to a rotary drive mechanism, which drives the feeding trolley 10 to rotate and delivers the molten iron in the material box 12 to the casting pipe mechanism 1; a feeding trolley is provided on the right side of the feeding trolley 10, which moves back and forth along a vertical direction perpendicular to the trolley track A11, and the feeding trolley can be used to pour molten iron into the material boxes 12 of different feeding trolleys 10, so that the feeding trolleys 10 can dump molten iron into their respective casting pipe mechanisms 1 in a quantitative manner.

[0039] In one embodiment of the present invention, Figure 1-4 As shown, the cast pipe feeding mechanism includes a feeding trolley 13, which moves left and right along the trolley track B14. The feeding trolley 13 is provided with a plurality of lifting mechanisms 15 along its length direction, and the lifting mechanisms 15 can provide support for the pipes pulled out by the pipe pulling mechanism.

[0040] In one embodiment of the present invention, Figure 2-4 and Figure 6 As shown, the lifting mechanism includes a vertical lifting frame 17 and a horizontal support shaft 18 connected to the top of the vertical lifting frame 17. A proximity switch 16 is provided on the left side of the lifting mechanism on the feeding trolley 12. When the pipe pulling mechanism drives the pipe to pass over a proximity switch 16, the horizontal support shaft 18 corresponding to the right side moves upward under the push of the vertical lifting frame 17 to provide support for the pipe passing over it.

[0041] In one embodiment of the present invention, Figure 6 As shown, two conical support rollers 19 are symmetrically arranged on the horizontal support shaft 18, and the large diameter ends of the two support rollers 19 are located at the end positions of the horizontal support shaft. The support rollers 19 at both ends of the horizontal support shaft 18 can limit the pipe fittings on the horizontal support shaft 18 to prevent the pipe fittings from rolling along the axial direction of the horizontal support shaft 18.

[0042] The workflow of this utility model is as follows:

[0043] 1. Press the reset button and all actions return to the starting point.

[0044] 2. Press the grinding start button and extend the grinding mechanism 8 into the tube mold of the casting mechanism 1. At the same time, the tube mold begins to gradually accelerate to the specified speed to grind the inner wall of the tube mold. After the grinding is completed, the tube mold stops rotating and a blocking disk is placed on the right end of the tube mold. At the same time, the grinding station is automatically switched to the spraying station.

[0045] 3. Press the spray start button, the spray mechanism 7 starts to move to the right along the axis of the tube mold. When it moves to the spraying position inside the tube mold, the spray valve opens, and returns after it moves to the front limit position. After it returns to the spraying position inside the tube mold, the spray valve closes until the spray mechanism returns to the origin, and then automatically switches to the tube pulling position (secondary cooling is required during spraying, and the screen must have the spraying water time).

[0046] 4. Press the bag turning start button, the feeding trolley 10 moves toward the pipe casting mechanism 1 to the specified position, and at the same time the centrifuge drives the pipe mold to increase to the specified speed, the feeding trolley 10 turns the bag to pour the molten iron in the feeding trolley 10 into the pipe mold of the pipe casting mechanism, and then the feeding trolley 10 returns to its original position. (The pipe mold speed does not turn or does not turn to the set low speed. Pressing the bag turning start button cannot move to prevent the molten iron from pouring into the pipe mold when the pipe mold is not turning. It is forced to move to the front limit, and the speed must reach the set high-speed standard to turn the bag. If either of these two points is not met, the bag cannot be turned to prevent the molten iron from not pouring into the pipe mold and injuring people. The bag turning will not move if the spray rod does not reach the rear limit start).

[0047] 5. After the pipe mold stops rotating, remove the blocking disk and press the pipe pulling start button. If the pipe mold is not stopped, the pipe pulling start button will not work. The pipe pulling mechanism 9 moves toward the casting mechanism 1. When the pipe pulling mechanism 9 moves to the specified position, the support rod 26 opens and drives the casting pipe back. When the support rod 26 passes over a certain lifting mechanism 15, the corresponding lifting mechanism 15 rises, and then the support rod 26 closes. Then all the lifting mechanisms 15 drive the casting pipe to descend, the pipe pulling mechanism returns to its original position, and switches to the spraying station. The left side of the lifting mechanism is respectively provided with The proximity switch 16 is used to detect the position of the cast pipe; the feeding trolley 13 drives the lifting mechanism 15 and the cast pipe above it to move to the left to the specified position and then stops. The unloading valve on the feeding trolley 13 is opened to lower the cast pipe into the material frame. The feeding trolley 13 drives the lifting mechanism 15 to return to the origin. The feeding trolley 13 cannot return to the origin without the lifting mechanism 15 descending, to prevent the lifting mechanism 15 from colliding with the pipe pulling mechanism 9; as long as the pipe pulling mechanism 9 moves forward, all the lifting mechanisms 15 must descend otherwise they are easily damaged, and the support rod 26 must also be closed.

[0048] The above is merely a preferred embodiment of the present invention and only specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. A three-in-one pipe casting equipment for pipe drawing, spraying and polishing, including a pipe casting mechanism, characterized by: A loading mechanism is provided on the right side of the casting pipe mechanism, a frame is provided on the left side of the casting pipe mechanism, a mounting plate is provided on the frame, the mounting plate and the frame are connected for sliding back and forth, a horizontal shifting mechanism is connected to the mounting plate, three parallel guide rails are connected to the mounting plate, and a mobile frame A, a mobile frame B and a mobile frame C are sequentially provided on the three guide rails from the inside to the outside, the mobile frame A, the mobile frame B and the mobile frame C are respectively connected to the guide rails for left and right sliding, the mobile frame A, the mobile frame B and the mobile frame C are respectively connected to the grinding mechanism, the spraying mechanism and the pipe pulling mechanism, a casting pipe feeding mechanism is provided below the grinding mechanism, the spraying mechanism and the pipe pulling mechanism on the frame, and the casting pipe feeding mechanism is connected for left and right sliding with the frame.

2. The three-in-one pipe drawing, spraying and polishing equipment according to claim 1, characterized in that: The horizontal shifting mechanism includes a horizontal adjustment screw rod connected between the mounting plates through threads, and both ends of the horizontal adjustment screw rod are rotatably connected to the frame.

3. The three-in-one pipe drawing, spraying and polishing equipment according to claim 1, characterized in that: The tube pulling mechanism includes a mounting seat fixedly connected to the mobile frame C, a positioning rod is connected to the center of the mounting seat for sliding left and right, a positioning plate is fixedly connected to the right end of the positioning rod, no less than three support rods are arranged around the positioning rod, and the support rods are evenly distributed around the positioning rod, the left end of the support rod is hinged to the mounting seat, and a torsion spring is connected at the hinge point between the support rod and the mounting seat, the left end of the positioning rod is connected to the piston rod of the hydraulic rod, and the pressure cylinder of the hydraulic rod is fixedly connected to the mounting seat.

4. The three-in-one pipe drawing, spraying and polishing equipment according to claim 3, characterized in that: The positioning plate is a truncated cone structure with an outer diameter larger than an inner diameter, and the maximum diameter of the positioning plate is larger than the aperture of the inscribed circle between the support rods, and the minimum diameter of the positioning plate is smaller than the aperture of the inscribed circle between the support rods.

5. The three-in-one pipe drawing, spraying and polishing equipment according to claim 4, characterized in that: A friction sleeve is fixedly connected to the outer surface of the support rod at a position close to the right end.

6. The three-in-one pipe drawing, spraying and polishing equipment according to claim 1, characterized in that: The feeding mechanism includes a feeding trolley, which moves left and right along the trolley track A. A material box is installed on the feeding trolley. The top of the material box is rotatably connected to the feeding trolley on the side close to the casting pipe mechanism, and the material box is connected to a rotating drive mechanism.

7. The three-in-one pipe drawing, spraying and polishing equipment according to claim 1, characterized in that: The cast pipe feeding mechanism includes a feeding trolley, which moves left and right along the trolley track B. The feeding trolley is provided with a plurality of lifting mechanisms along its length direction.

8. The three-in-one pipe drawing, spraying and polishing equipment according to claim 7, characterized in that: The lifting mechanism includes a vertical lifting frame and a horizontal supporting horizontal shaft connected to the top of the vertical lifting frame. A proximity switch is provided on the left side of the lifting mechanism on the feeding trolley.

9. The three-in-one pipe drawing, spraying and polishing equipment according to claim 8, characterized in that: Two truncated cone-shaped support rollers are symmetrically arranged on the horizontal support transverse axis, and the large-diameter ends of the two support rollers are located at the end positions of the horizontal support axis.

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