A wall thickness detection device for a ductile cast iron pipe

Abstract

The utility model provides a kind of wall thickness detection device of nodular cast iron pipe, belong to steel processing equipment field, including centrifuge, centrifuge outer surface is equipped with rotary base, rotary base is located above discharge port, rotary base is equipped with connecting rod on, connecting rod end has lifting rod, lifting rod end has wall thickness detector, wall thickness detector is in contact with cast iron pipe outer surface, rotary base includes fixed base, fixed base is fixed on centrifuge, fixed base has rotatable carousel in, carousel is equipped with limit rod, limit rod end passes through carousel and is located in pipe seat, the utility model is suitable for the wall thickness measurement of cast iron pipe, wall thickness detector is moved to cast iron pipe above by rotary base rotation, wall thickness detector is contacted with cast iron pipe outer surface after being moved up and down by lifting rod, and cast iron pipe wall thickness is measured.

Description

Technical Field

[0001] This utility model relates to the field of steel processing equipment, specifically to a wall thickness detection device for ductile iron pipes. Background Technology

[0002] In the production of ductile iron pipes, current technology mainly relies on manual inspection of the pipe wall thickness using handheld tools while the pipe is cold, and then transmitting the inspection information to the workers. This technology can, to a certain extent, detect the wall thickness of ductile iron pipes, providing a basis for quality control in the production process and ensuring that the wall thickness of the ductile iron pipes meets relevant standards and requirements, thus playing a fundamental quality inspection role in traditional production processes.

[0003] The entire testing process relies entirely on manual operation; everything from using handheld tools to transmitting information is done manually. Ductile iron pipes have a certain weight and size, requiring manual inspection of each pipe, often necessitating multiple measurements at different locations. This results in a significant physical workload for the operators. Prolonged periods of this strenuous labor can easily lead to operator fatigue, potentially affecting the accuracy and efficiency of the testing. Utility Model Content

[0004] In view of this, the present invention provides a wall thickness detection device for ductile iron pipes. The wall thickness detector can be moved above the cast iron pipe by rotating the base, and the wall thickness is measured after the lifting rod moves up and down to make contact with the outer surface of the cast iron pipe.

[0005] To solve the above-mentioned technical problems, this utility model provides a wall thickness detection device for ductile iron pipes, including a centrifuge. The centrifuge uses centrifugal force generated by high-speed rotation to evenly coat molten iron onto the inner wall of a mold, forming a tubular casting with a specific shape and size. A rotating base is installed at the end of the centrifuge near the discharge port. The rotating base includes a fixed seat, which is connected to the top of the centrifuge by bolts, facilitating disassembly and replacement of the fixed seat. A turntable rotates inside the fixed seat, and a connecting rod is connected to the turntable. A lifting rod is located at the end of the connecting rod away from the rotating base, and a wall thickness detector is installed at the end of the lifting rod near the centrifuge. The connecting rod is inclined, tilted away from the centrifuge discharge port, and the end of the connecting rod away from the rotating base is located above the cast iron pipe. This is used to increase the height of the connecting rod and the centrifuge discharge port, preventing the wall thickness detector from blocking the centrifuge discharge. Rotating the rotating base can also rotate and move the wall thickness detector above the centrifuge, avoiding collision with the centrifuge.

[0006] Furthermore, two slots are made on the turntable and the fixed base, located on both sides of the turntable and the fixed base. The slots are arranged linearly, and the center point of the slots overlaps with the center line of the centrifuge. A limiting rod is placed in the slot. When the wall thickness detector is above the cast iron pipe, the end of the limiting rod passes through the turntable and is located in the fixed base, so that the center line of the outer surface of the wall thickness detector and the outer surface of the cast iron pipe are in contact, and the wall thickness detector is in a central position, which can better detect the thickness of the cast iron pipe. When the wall thickness detector is rotated to be above the centrifuge, the end of the limiting rod passes through the turntable and is located in the fixed base, which limits the turntable and prevents the wall thickness detector from rotating above the centrifuge and causing unnecessary trouble.

[0007] The connecting rod has a round hole at the end away from the rotating base. The lifting rod is located inside the round hole, and the outer surface of the lifting rod abuts against the inner surface of the round hole. There is a rack on one side of the lifting rod. A motor is bolted to the connecting rod near the rack. The output end of the motor is connected to a gear through a coupling. The gear meshes with the rack, and the gear can drive the rack to move up and down. When the rack moves up and down, it can drive the lifting rod to move up and down, so that the wall thickness gauge abuts against the outer surface of the cast iron pipe. At the same time, the up and down movement of the lifting rod can prevent the cast iron pipe from colliding with the wall thickness gauge when centrifuging.

[0008] Furthermore, a guide groove is made on the lifting rod on the side away from the rack, and a guide block is connected to the inner surface of the circular hole by bolts, so that the guide block is located in the guide groove. The two sides of the guide block abut against the inner wall of the guide groove. When the lifting rod moves up and down, the guide block can limit the lifting rod, so that the lifting rod slides horizontally up and down in the circular hole.

[0009] The lifting rod and wall thickness gauge are detachable, facilitating replacement and maintenance of the wall thickness gauge. A threaded hole is located at the end of the lifting rod near the cast iron pipe, and the wall thickness gauge has external threads at the end near the lifting rod. The external threads of the wall thickness gauge are screwed into the threaded hole to complete the connection. A cable tray is located at the center of the lifting rod, communicating with the threaded hole. The cable used by the wall thickness gauge is passed through the cable tray, protecting the cable harness and preventing breakage due to impact.

[0010] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0011] 1. Automated testing improves efficiency and accuracy: The mechanical structure of the rotating base and lifting rod replaces manual hand tools for testing, reducing physical labor for operators, avoiding testing errors caused by fatigue, and improving testing efficiency and accuracy.

[0012] 2. The structural design is reasonable, avoiding equipment interference; the connecting rod is inclined to increase its height relative to the centrifuge outlet, preventing the wall thickness probe from obstructing the centrifuge discharge. Simultaneously, rotating the base allows the wall thickness probe to be rotated above the centrifuge, avoiding collisions. The slotted design of the turntable and fixed base, along with the limiting rod, ensures the wall thickness probe is positioned at the center line of the cast iron pipe during testing, guaranteeing accurate positioning and improving the reliability of the test results. In non-testing states, the turntable is limited to prevent the wall thickness probe from rotating and causing problems.

[0013] 3. Stable lifting structure and strong adaptability to testing: The motor drives the lifting rod to move up and down through gear and rack meshing, realizing the contact and separation between the wall thickness detector and the outer surface of the cast iron pipe. It can adapt to the testing needs under different working conditions and avoid collisions between the cast iron pipe and the testing device during operation. The cooperation of the guide block and guide groove limits the movement of the lifting rod, ensuring its horizontal up and down sliding and improving the stability and accuracy of the lifting process.

[0014] 4. Easy maintenance and wiring harness protection: The lifting rod and the wall thickness sensor are detachably connected (threaded connection), facilitating the replacement and maintenance of the wall thickness sensor. The wiring cavity inside the lifting rod protects the wall thickness sensor wiring harness, preventing breakage due to impact and improving the reliability and service life of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of a wall thickness detection device for ductile iron pipes according to the present invention.

[0016] Figure 2 This is a cross-sectional structural diagram of the centrifuge of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Centrifuge; 2. Rotating base; 3. Connecting rod; 4. Lifting rod; 5. Wall thickness detector; 5.1. Fixed base; 5.2. Turntable; 6. Circular hole; 7. Rack; 8. Motor; 9. Gear; 10. Guide block; 11. Guide groove; 12. Cable routing cavity; 13. Limiting rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-2 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0019] like Figure 1 , 2 As shown:

[0020] This embodiment provides a wall thickness detection device for ductile iron pipes, including a centrifuge 1. The centrifuge 1 generates centrifugal force through high-speed rotation, uniformly adhering molten iron to the inner wall of a mold to form a tubular casting of a specific shape and size. A pipe puller is installed near the outlet end of the centrifuge 1, which is connected to the cast iron pipe to remove it. A rotating base 2 is installed near the discharge end of the centrifuge 1. The rotating base 2 includes a fixed seat 2.1, which is bolted to the top of the centrifuge 1, making it easy to disassemble and replace. A rotatable turntable 2.2 is provided inside the fixed seat 2.1, forming a rotatable connection between the turntable 2.2 and the fixed seat 2.1, allowing the turntable 2.2 to rotate flexibly within the fixed seat 2.1. A connecting rod 3 is connected to the turntable 2.2, with one end of the connecting rod 3 fixedly connected to the turntable 2.2.

[0021] The connecting rod 3 is inclined, tilted away from the discharge port of the centrifuge 1, and the end of the connecting rod 3 away from the rotating base 2 is located above the cast iron pipe. This inclined arrangement has important functions. On the one hand, it increases the height of the connecting rod 3 and the discharge port of the centrifuge 1, preventing the wall thickness sensor 5 installed on the connecting rod 3 from blocking the discharge of the centrifuge 1. On the other hand, when the rotating base 2 is rotated, it can drive the connecting rod 3 and the wall thickness sensor 5 to rotate and move above the centrifuge 1, avoiding collision with the centrifuge 1.

[0022] Two slots are made on the turntable 2.2 and the fixed base 2.1, respectively, located on both sides of the turntable 2.2 and the fixed base 2.1, arranged linearly, with the center point of the slots overlapping the center line of the centrifuge 1. A limit rod 13 is placed in the slot, forming a sliding fit with the slot, and can move within the slot.

[0023] When the wall thickness gauge 5 is positioned above the cast iron pipe, the end of the limiting rod 13 is inserted into the fixed base 2.1 through the turntable 2.2. At this time, the limiting rod 13 limits the turntable 2.2, causing the center line of the outer surface of the wall thickness gauge 5 to contact the center line of the cast iron pipe, ensuring the wall thickness gauge is centered and thus more accurately measuring the thickness of the cast iron pipe. When it is necessary to rotate the wall thickness gauge above the centrifuge 1, the end of the limiting rod 13 is similarly inserted into the fixed base 2.1 through the turntable 2.2 to limit the turntable 2.2 and prevent the wall thickness gauge from rotating above the centrifuge 1, thus avoiding unnecessary problems.

[0024] The connecting rod 3 has a circular hole 6 at the end away from the rotating base 2. The lifting rod 4 is located inside the circular hole 6, and the outer surface of the lifting rod 4 abuts against the inner surface of the circular hole 6 to form a sliding connection, so that the lifting rod 4 can move up and down inside the circular hole 6.

[0025] A rack 7 is provided on one side of the lifting rod 4. A motor 8 is fixedly connected to the connecting rod 3 near the rack 7 by bolts. The output end of the motor 8 is connected to a gear 9 through a coupling. The gear 9 is meshed with the rack 7. When the motor 8 is working, it drives the gear 9 to rotate through the coupling. The rotation of the gear 9 drives the rack 7 to move up and down, thereby driving the lifting rod 4 to move up and down.

[0026] The lifting rod 4 can move up and down to make the wall thickness gauge come into contact with the outer surface of the cast iron pipe to achieve the detection function; at the same time, when the cast iron pipe is running in the centrifuge 1, the lifting rod 4 can move up and down to prevent the cast iron pipe from colliding with the wall thickness gauge at a certain point.

[0027] A guide groove 11 is formed on the lifting rod 4 on the side away from the rack 7. A guide block 10 is fixedly connected to the inner surface of the circular hole 6 by bolts. The guide block 10 is located in the guide groove 11, and its two sides abut against the inner wall of the guide groove 11, forming a sliding fit between the guide block 10 and the guide groove 11. When the lifting rod 4 moves up and down, the guide block 10 slides in the guide groove 11, limiting the lifting rod 4 and allowing it to slide horizontally up and down in the circular hole 6, ensuring the smoothness and accuracy of the lifting rod 4's movement.

[0028] The lifting rod 4 and the wall thickness gauge are detachable for easy replacement and maintenance. The specific connection method is as follows: a threaded hole is made at the end of the lifting rod 4 near the cast iron pipe, and the wall thickness gauge has an external thread at the end near the lifting rod 4. The external thread of the wall thickness gauge is screwed into the threaded hole to complete the connection.

[0029] A cable tray 12 is provided at the center of the lifting rod 4, and the cable tray 12 is connected to the threaded hole. The wire harness used by the wall thickness gauge can pass through the cable tray 12, which protects the wire harness and prevents it from breaking due to collision.

[0030] Working principle: The rotating base 2 (including the fixed base 2.1 and the internal rotatable turntable 2.2) is installed above the discharge port of the centrifuge 1. The connecting rod 3 on the turntable 2.2 is inclined (raising the height of the discharge port). The end of the rod away from the rotating base 2 is slidably connected to the lifting rod 4 through the round hole 6. The rack 7 on one side of the lifting rod 4 meshes with the gear 9 driven by the motor 8 on the connecting rod 3. When the motor 8 rotates, it drives the lifting rod 4 to move up and down through the gear 9 and rack 7, so that the end wall thickness detector 5 contacts the outer surface of the cast iron pipe to detect the wall thickness; the turntable 2.2 and the fixed base 2.1... A limiting rod 13 is provided in the slot. When the wall thickness detector 5 is located above the cast iron pipe for detection, the end of the limiting rod 13 passes through the turntable 2.2 into the fixed seat 2.1, so that the wall thickness detector 5 abuts against the center line of the cast iron pipe and limits the turntable 2.2. When it is necessary to avoid the centrifuge 1, the turntable 2.2 is rotated to rotate the wall thickness detector 5 above the centrifuge 1, and the limiting rod 13 limits the turntable 2.2 again. The lifting rod 4 cooperates with the guide block 10 and the guide groove 11 to ensure smooth movement, and is detachably connected to the wall thickness detector 5 by threads. The internal wiring cavity 12 is used to protect the detection wire harness.

[0031] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A device for detecting the wall thickness of ductile iron pipes, comprising a centrifuge (1), characterized in that: The centrifuge (1) has a rotating base (2) on its outer surface. The rotating base (2) is located above the discharge port. The rotating base (2) has a connecting rod (3). The connecting rod (3) has a lifting rod (4) at the end away from the rotating base (2). The lifting rod (4) has a wall thickness detector (5) at the end near the cast iron pipe. The wall thickness detector (5) is in contact with the outer surface of the cast iron pipe. The rotating base (2) includes a fixed base (2.1) which is fixed to the centrifuge (1). The fixed base (2.1) has a rotatable turntable (2.2) inside, and a limiting rod (13) is provided on the turntable (2.2). The end of the limiting rod (13) passes through the turntable (2.2) and is located inside the fixed base (2.1).

2. The wall thickness detection device for ductile iron pipe as described in claim 1, characterized in that: The connecting rod (3) is inclined at the end near the lifting rod (4) to increase the height of the end of the connecting rod (3) near the lifting rod (4) and the discharge port.

3. The wall thickness detection device for ductile iron pipes as described in claim 2, characterized in that: The connecting rod (3) has a round hole (6) at one end away from the rotating base (2), the lifting rod (4) is located inside the round hole (6), the outer surface of the lifting rod (4) abuts against the inner surface of the round hole (6), and the lifting rod (4) has a rack (7) on one side; The connecting rod (3) has a motor (8), and the output end of the motor (8) has a gear (9), which meshes with the rack (7).

4. The wall thickness detection device for ductile iron pipe as described in claim 3, characterized in that: The inner surface of the circular hole (6) has a guide block (10) at the end away from the rack (7), and the lifting rod (4) has a guide groove (11). The guide block (10) is located in the guide groove (11), and the two sides of the guide block (10) abut against the inner sidewall of the guide groove (11).

5. The wall thickness detection device for ductile iron pipe as described in claim 4, characterized in that: The lifting rod (4) and the wall thickness detector (5) are detachably connected.

6. The wall thickness detection device for ductile iron pipe as described in claim 5, characterized in that: The lifting rod (4) and the wall thickness detector (5) are connected by a thread.

7. The wall thickness detection device for ductile iron pipe as described in claim 6, characterized in that: The lifting rod (4) has a cable routing cavity (12) inside.

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