Pipe inner wall flatness measuring device

Abstract

The utility model discloses a pipe inner wall flatness measuring device which comprises a driving device and a detecting device, the driving device comprises a motor, a screw rod, a guide rod and a bottom plate, the motor is installed on the bottom plate and can drive the screw rod to rotate, the guide rod and the screw rod are arranged in parallel, the detecting device comprises a connecting seat, a probe and a dial plate, the connecting seat is in threaded connection with the screw rod, and the probe is connected with the dial plate. The guide rod is slidably connected with the connecting seat, the connecting seat can be close to or away from the motor, the connecting seat is provided with at least one supporting rod, the supporting rod extends towards the inner wall of the pipe, the supporting rod is provided with the probe, the probe abuts against the inner wall of the pipe, and the dial plate can display data of the probe. According to the utility model, the sliding probe is used for measuring the inner wall of the pipe, and the final objective inner wall flatness value is obtained in a scientific data processing mode.

Description

Technical Field

[0001] This utility model relates to the field of pipe production equipment technology, and more specifically, to a pipe inner wall flatness measuring device. Background Technology

[0002] When pipes are extruded, the inner wall of the pipe is affected by the raw materials, equipment, mold, and cooling. Therefore, the inner wall is not a standard cylindrical surface and may have defects such as wrinkles and small pits. Pipes are essential materials in construction projects, commonly including water supply pipes, drainage pipes, gas pipes, heating pipes, electrical conduits, and rainwater pipes. Most pipes transport certain substances, so the smoothness of their inner walls affects transportation efficiency, media residue, and impurity accumulation. Therefore, the smoothness of the inner wall needs to be reflected by test data. However, national standards do not specify requirements for the smoothness of the inner wall of pipes. As a result, most manufacturers rely on visual observation and comparison of original and new samples to assess pipe smoothness, without accurate testing. Therefore, a technical solution is needed to address these issues. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and to accurately test the flatness of the inner wall of pipes, thereby providing a device for measuring the flatness of the inner wall of pipes.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a device for measuring the flatness of the inner wall of a pipe, including a driving device and a detection device. The driving device includes a motor, a lead screw, a guide rod, and a base plate. The motor is mounted on the base plate and can drive the lead screw to rotate. The guide rod is arranged parallel to the lead screw. The detection device includes a connecting seat, a probe, and a dial. The connecting seat is threadedly connected to the lead screw, and the guide rod is slidably connected to the connecting seat. The connecting seat can be close to or away from the motor. The connecting seat is provided with at least one support rod, which extends toward the inner wall of the pipe. The probe is mounted on the support rod and abuts against the inner wall of the pipe. The dial can display the probe data.

[0006] Furthermore, the support rods are provided in multiples, and the multiple support rods are distributed in a ring.

[0007] Furthermore, the connecting seat includes a guide tube and a connector, the connector being threadedly connected to the lead screw, and the guide tube being slidably connected to the guide rod.

[0008] Furthermore, the detection device includes a support member, which is installed at the end of the guide tube away from the motor. The support member is detachably connected to the guide tube, and the support rod is located on the support member.

[0009] Furthermore, the detection device includes a slider, the side of the support rod is provided with a groove, the slider is provided with a slide bar corresponding to the groove, the slider is slidably mounted on the support rod, the slider can approach or move away from the inner wall of the pipe, and the probe is mounted on the end of the slider facing the inner wall of the pipe.

[0010] Furthermore, the dial is mounted to the slider via a connecting rod, the connecting rod extending away from the slider, the dial being mounted at the end of the connecting rod away from the slider, and the dial being located outside the tube.

[0011] Furthermore, there are two motors and two lead screws, with the two lead screws located on both sides of the guide rod.

[0012] The beneficial effects of this utility model are:

[0013] 1. The distance between the probe and the pipe of this utility model is adjustable, and the replaceable support can adapt to the measurement of pipes of various specifications and inner diameters. The position of the probe on the support rod can be adjusted by the slider, which is convenient and reduces the time of switching the pipe model to be tested.

[0014] 2. The multi-probe measurement at multiple points improves the accuracy and efficiency of the measurement data. Scientific data processing methods are used to obtain the final objective inner wall flatness value. The smaller the value, the more flat the surface. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment.

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0017] Figure 3 This is a side view of this embodiment.

[0018] Reference numerals: 1. Drive device; 11. Motor; 12. Lead screw; 13. Guide rod; 14. Base plate; 2. Detection device; 21. Connecting seat; 211. Guide tube; 212. Connecting piece; 22. Support rod; 221. Support piece; 222. Slide groove; 23. Probe; 231. Slider; 2311. Slide bar; 24. Dial; 241. Connecting rod; 3. Pipe. Detailed Implementation

[0019] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment discloses a pipe inner wall flatness measuring device, including a driving device 1 and a detection device 2. The driving device 1 includes a motor 11, a lead screw 12, a guide rod 13, and a base plate 14. There are two motors 11, which are mounted on the base plate 14. There are two lead screws 12, which can drive the lead screws 12 to rotate synchronously. The guide rod 13 is arranged parallel to the lead screws 12, and the two lead screws 12 are located on both sides of the guide rod 13, which can drive the detection device 2 to move more stably.

[0021] The testing device 2 includes a connecting seat 21, a probe 23, and a dial 24. The connecting seat 21 includes a guide tube 211 and a connector 212. The connecting seat 21 is threadedly connected to the lead screw 12, and the guide rod 13 is slidably connected to the connecting seat 21. The connector 212 is threadedly connected to the two lead screws 12, and the guide tube 211 is slidably connected to the guide rod 13. The rotation of the two lead screws 12 can drive the connecting seat 21 to slide along the guide rod 13 closer to or away from the motor 11, so that the probe 23 can move along the inner wall of the pipe 3, thereby measuring the flatness of the inner wall of the pipe 3.

[0022] The testing device 2 includes a support member 221, which is installed at the end of the guide tube 211 away from the motor 11. The support member 221 is detachably connected to the guide tube 211. The support member 221 can be selected according to the inner diameter of the pipe 3 to be measured, so that the length of the support rod 22 is suitable for the inner diameter of the pipe 3 to be measured. The support member 221 is provided with multiple support rods 22, which are arranged in a ring. The support rods 22 extend toward the inner wall of the pipe 3, which can measure the flatness of the inner wall of the pipe 3 from multiple points, and the measurement data is more accurate.

[0023] The detection device 2 includes a slider 231, a groove 222 on the side of the support rod 22, and a slider 231 with a slide bar 2311 corresponding to the groove 222. The slider 231 is slidably mounted on the support rod 22 and can move closer to or further away from the inner wall of the pipe 3. A probe 23 is installed at the end of the slider 231 facing the inner wall of the pipe 3 and abuts against the inner wall of the pipe 3. A dial 24 can display the data of the probe 23. The dial 24 can be installed for each slider 231 and connected to each probe 23, or only one dial 24 can be set to connect all the probes 23. In actual operation, the pipe 3 is first fixed, and the data is then displayed according to the parameters of the pipe 3. Select a support component 221 of appropriate size. First, adjust the slider 231 to the lowest point through the slide groove 222. Control the motor 11 to move the detection device 2 into the pipe 3. According to the inner diameter of the pipe 3, move the slider 231 to adjust the position of the probe 23 so that the probe 23 is pressed against the inner wall of the pipe 3 and is in a compressed state. Then, fix the slider 231 to the support rod 22 with screws. Adjust the digital display of the dial 24 to zero. Then start the motor 11 to drive the lead screw 12 so that the probe 23 is pressed against the inner wall of the pipe 3 and moves into the pipe 3. The dial 24 can process the relative undulation value of the inner wall of the pipe 3 detected by the probe 23 and obtain the final data, which is reflected on the digital display of the dial 24.

[0024] The dial 24 is mounted on the slider 231 via the connecting rod 241. The connecting rod 241 extends away from the slider 231. The dial 24 is mounted on the end of the connecting rod 241 away from the slider 231. The dial 24 is located outside the pipe 3. During the measurement process when the detection device 2 moves into the pipe 3, the dial 24 is always located outside the pipe 3. The data on the dial 24 can be observed in real time. The final objective inner wall flatness value is obtained by using scientific data processing methods. The square root of the square difference between the change in the detection data and its average value is obtained. The smaller the value, the flatter the surface.

[0025] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A device for measuring the flatness of the inner wall of a pipe, characterized in that, The device includes a driving device (1) and a detection device (2). The driving device (1) includes a motor (11), a lead screw (12), a guide rod (13), and a base plate (14). The motor (11) is mounted on the base plate (14) and can drive the lead screw (12) to rotate. The guide rod (13) is arranged parallel to the lead screw (12). The detection device (2) includes a connecting seat (21), a probe (23), and a dial (24). The connecting seat (21) is connected to the base plate (14) and the base plate (14). The lead screw (12) is threaded, the guide rod (13) is slidably connected to the connecting seat (21), the connecting seat (21) can be close to or away from the motor (11), the connecting seat (21) is provided with at least one support rod (22), the support rod (22) extends toward the inner wall of the tube (3), the support rod (22) is mounted with a probe (23), the probe (23) abuts against the inner wall of the tube (3), and the dial (24) can display the data of the probe (23).

2. The pipe inner wall flatness measuring device according to claim 1, characterized in that, The support rod (22) is provided in multiple ways, and the multiple support rods (22) are arranged in a ring.

3. The pipe inner wall flatness measuring device according to claim 1, characterized in that, The connecting seat (21) includes a guide tube (211) and a connector (212). The connector (212) is threadedly connected to the lead screw (12), and the guide tube (211) is slidably connected to the guide rod (13).

4. The pipe inner wall flatness measuring device according to claim 3, characterized in that, The detection device (2) includes a support member (221), which is installed at the end of the guide tube (211) away from the motor (11). The support member (221) is detachably connected to the guide tube (211), and the support rod (22) is located on the support member (221).

5. The pipe inner wall flatness measuring device according to claim 1, characterized in that, The detection device (2) includes a slider (231), the side of the support rod (22) is provided with a groove (222), the slider (231) is provided with a slide bar (2311) corresponding to the groove (222), the slider (231) is slidably installed on the support rod (22), the slider (231) can approach or move away from the inner wall of the pipe (3), and the probe (23) is installed at the end of the slider (231) facing the inner wall of the pipe (3).

6. The pipe inner wall flatness measuring device according to claim 5, characterized in that, The dial (24) is mounted on the slider (231) via a connecting rod (241) extending away from the slider (231). The dial (24) is mounted on the end of the connecting rod (241) away from the slider (231) and is located outside the tube (3).

7. The pipe inner wall flatness measuring device according to claim 1, characterized in that, Two motors (11) are provided, and two lead screws (12) are provided accordingly. The two lead screws (12) are located on both sides of the guide rod (13).

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