CN211085186U

CN211085186U - Plastic pipe outer diameter detector

Info

Publication number: CN211085186U
Application number: CN201922146088.9U
Authority: CN
Inventors: 陈东
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-07-24
Anticipated expiration: 2029-12-03

Abstract

The utility model discloses a plastics tubular product external diameter detector mainly relates to plastic tubing detection area. The device comprises a positioning module, a positioning module and a positioning module, wherein the positioning module comprises two rotating shafts which are arranged in parallel, a carrier roller for placing a sample pipe is fixed on each rotating shaft, the distance between the two carrier rollers is 1.0cm-2.5cm, and the inclination angle of each rotating shaft is 10-25 degrees; the detection module comprises an upper module and a lower module, wherein the upper module is located at the center position above two carrier rollers, a plurality of upper detection heads are arranged in the extending direction of the rotating shaft, the lower module is located at the center position below the two carrier rollers, a plurality of lower detection heads are arranged in the extending direction of the rotating shaft, the number and the positions of the upper detection heads and the lower detection heads correspond to each other, and the upper detection heads and the lower detection heads are used for obtaining distance data in the relative direction. The beneficial effects of the utility model reside in that: the device can measure the outer diameter of a plurality of positions of the same pipe sample with high efficiency and high precision, thereby judging a plurality of quality indexes in an auxiliary way.

Description

Plastic pipe outer diameter detector

Technical Field

The utility model relates to a plastic tubing detection area specifically is plastic tubing external diameter detector.

Background

The plastic pipe is a common chemical building material, and is a fourth major novel building material which is emerging in the modern time after steel, wood and cement. Comprises the following steps: foaming pipe, acrylic acid copolymerization polyvinyl chloride pipe, drainage pipe, PP pipe, agricultural pipe, PVC plastic pipe, five-hole pipe, seven-hole pipe, double-wall corrugated pipe, HDPE double-wall corrugated pipe, communication pipe, power pipe, plum blossom pipe, permeable pipe, silicon core pipe, HDPE silicon core pipe, high-voltage power pipe, carbon pipe, optical cable pipe, square-hole grid pipe, cable sheath pipe, carbon pipe, three-color optical cable pipe, PVC grid pipe and PVC plastic wire pipe.

The plastic pipe has the advantages of small water flow loss, energy conservation, material saving, ecological protection, convenient completion and the like, and is widely applied to the fields of building water supply and drainage, town water supply and drainage, gas pipes and the like at present. For plastic pipes, the quality is very important. The detection and analysis of the chemical building material plastic pipe are mainly carried out aiming at the characteristics and the application, wherein the most basic and important is the detection of the outer diameter.

At present, two basic methods are mainly adopted for detecting the outer diameter, one is to directly measure the outer diameter, and the other is to measure the perimeter or other data, and then the outer diameter is obtained through conversion. Both methods correspond to a number of devices. However, in the existing equipment, if a manual measuring tool is adopted, artificial error factors exist, and a large amount of manpower and material resources are wasted. If the device is an automatic detection device, the sample is required to be correspondingly placed at a specified position, so that the placing position and the placing angle of the sample meet the requirements, otherwise, the measurement result is inaccurate. This placement process is also time consuming and can also cause errors in the measurement data due to human (placement) factors. Meanwhile, the multi-point position detection of the same pipe fitting is not realized, and if the multi-point position outer diameter data of the same plastic pipe is to be measured, the multi-point position outer diameter data needs to be measured one by one. Therefore, the existing outer diameter measuring equipment needs further improvement in detection efficiency and precision.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a plastics tubular product external diameter detector, it can carry out high-efficient, the high accuracy measurement of external diameter to a plurality of positions of same pipe fitting sample to once only supplementary judgement multinomial quality index.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

plastics tubular product external diameter detector includes:

the positioning module comprises two rotating shafts which are arranged in parallel, two or one of the rotating shafts is driven by a motor, a carrier roller for placing a sample pipe is fixed on the rotating shaft, the distance between the two carrier rollers is 1.0cm-2.5cm, the rotating shaft is obliquely arranged, the inclination angle is 10-25 degrees, and a support block for supporting the sample pipe at the lower end of the rotating shaft is arranged at the lower end of the rotating shaft;

the detection module comprises an upper module and a lower module, wherein the upper module is located at the center of the upper part of each carrier roller, a plurality of upper detection heads are arranged in the extending direction of the rotating shaft, the lower module is located at the center of the lower part of each carrier roller, a plurality of lower detection heads are arranged in the extending direction of the rotating shaft, the number and the positions of the upper detection heads and the lower detection heads correspond to those of the lower detection heads, and the upper detection heads and the lower detection heads are used for obtaining distance data in the relative direction.

Furthermore, the distance between the upper detection heads is adjustable, and the distance between the lower detection heads is adjustable.

Furthermore, the detection module also comprises a limit module;

the upper die set comprises upper guide rail rods arranged above the rotating shafts in parallel, the upper guide rail rods are arranged in the middle of the two rotating shafts, a plurality of upper sliding blocks sliding along the length direction of the upper guide rail rods are matched on the upper guide rail rods, an upper detection head is arranged in the middle of the bottom of each upper sliding block, each upper detection head is a distance measurement sensor, and a spiral spring part is arranged between every two adjacent upper sliding blocks;

the lower module comprises a lower guide rail rod arranged below the rotating shafts in parallel, the lower guide rail rod is arranged in the middle of the two rotating shafts, a plurality of lower sliding blocks sliding along the length direction of the lower guide rail rod are matched on the lower guide rail rod, a lower detection head is arranged in the middle of the top surface of each lower sliding block, each lower detection head is a distance measuring sensor, and a spiral spring part is arranged between every two adjacent lower sliding blocks;

the limiting module comprises a limiting plate, a screw rod and a big nut, the screw rod is arranged above the upper guide rail rod in parallel, the upper portion of the limiting plate is provided with an upper stop block used for enabling the upper guide rail rod to run through, the upper stop block is used for blocking an upper sliding block located on the outermost side at the outer end, the lower portion of the limiting plate is provided with a lower stop block used for enabling the lower guide rail rod to run through, the lower stop block is used for blocking a lower sliding block located on the outermost side at the outer end, the middle of the limiting plate is provided with a yielding window used for enabling the positioning module to pass through, the top end of the limiting plate is provided with a through hole used for enabling the screw rod to run through, and the big nut is in threaded fit with the.

The support module comprises a bottom plate and a vertical plate, the vertical plate is obliquely fixed on the bottom plate, the inclination angle between the vertical plate and the bottom plate is 80-65 degrees, and the lower end of the rotating shaft is vertically fixed on the vertical plate.

Furthermore, a plurality of grooves are distributed on the surface of the carrier roller along the circumferential direction of the carrier roller, and the extending direction of the grooves corresponds to the length direction of the carrier roller.

Furthermore, the support block is fixed on the vertical plate and located in the middle above the two carrier rollers, a support surface perpendicular to the rotating shaft is arranged on the support block and located on one side of the lower end of the carrier roller, and a PTFE coating is arranged on the support surface.

Contrast prior art, the beneficial effects of the utility model reside in that:

1) the sample corresponds the detection position automatically, and is quick accurate, when improving detection efficiency greatly, avoids the error factor of artifical counterpoint.

2) The outer diameter data of a plurality of positions in the circumferential direction can be obtained, and the quality problem of the section of the pipe fitting can be judged in an auxiliary manner;

3) the outer diameter data of a plurality of detection positions in the length direction can be obtained simultaneously, and the uniformity and quality problems of the pipe fittings can be further judged in an auxiliary manner;

4) the device has a simple structure, greatly reduces the cost, can meet the requirements of multiple quality detection, and can efficiently obtain accurate detection data.

Drawings

Fig. 1 is a schematic view of the initial state of the present invention.

Fig. 2 is a side view of the present invention in its initial state.

Fig. 3 is a schematic diagram of the limiting state of the present invention.

Figure 4 is a side view of the limit state of the present invention.

Reference numerals shown in the drawings:

1. a base plate; 2. a vertical plate; 3. a rotating shaft; 4. a carrier roller; 5. a support block; 6. an upper guide rail rod; 7. an upper sliding block; 8. an upper detection head; 9. a helical spring member; 10. a lower guide rail rod; 11. a lower slider; 12. a lower detection head; 13. a limiting plate; 14. a screw; 15. a large nut; 16. an upper stop block; 17. and a lower stop block.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

Example 1: plastic pipe outer diameter detector

For the measurement of the outer diameter, most of the devices generally correspond to the direct measurement of the diameter of plastic pipes. Simple is a measuring tool such as a caliper, and highly configured is a laser projection dimension measuring instrument. In general, the measurement of the outer diameter is not only to obtain the outer diameter of a certain position of a certain section of sample pipe, but at least the following quality information needs to be obtained through the measurement of the outer diameter:

1) average outer diameter-but this data generally requires an average. Because each batch of pipes needs to take a plurality of samples for detection, and needs to detect pipe samples on a plurality of production lines, generally, the outer diameters detected by all corresponding sample pipes are counted by taking the average number as the data of the outer diameters for each batch of products, each production line, each unit for inspection and the like as a statistical unit. The data acquisition generally needs to rely on the accumulation of basic data of the external diameter measurement of a certain number of sample pipes, and if a simple measuring tool is used, on one hand, the workload is large, and on the other hand, more human factors exist, so that the measured data is inaccurate. If a high-precision measuring instrument, such as a laser projection measuring instrument, is used for measuring the pipe diameter, the cost is too high, and a sample needs to be placed at a set position according to requirements, and if the position of a sample pipe is not well placed, the deviation of the measuring result is caused. Therefore, although the labor can be saved and the precision can be improved, the efficiency is not obviously improved.

2) Cross-sectional condition. In the extrusion and drawing production process of the plastic pipe, whether the section of the plastic pipe can be ensured to be a perfect circle or not is one of important indexes of quality. Has great influence on subsequent application and function realization. Is the data that must be detected. The existing detection method and equipment are independent equipment for the aspect, or integrated high-precision equipment is adopted, so that the cost is too high. Actually, through the thought in the work, the three parties have many corresponding relations with the outer diameter, and the two parties can be combined and detected on the basis of not increasing the configuration cost.

3) And deviation of thickness. In the processing of plastic pipes, due to the stability of the equipment, process adjustment and the influence of changes of the surrounding environment (mainly temperature and the like), the pipe fitting is prone to have uneven thickness, so that whether the outer diameter changes or not needs to be judged by obtaining the outer diameters of a plurality of positions, and thickness deviation data is obtained to assist the comprehensive index of the pipe fitting quality.

The quality index provides requirements for work, namely, in the measurement of the outer diameter and related data of the plastic pipe, a large number of pipe samples and a plurality of positions of the same pipe sample need to be subjected to efficient and high-precision measurement of the outer diameter, so that the quality indexes of the plurality of pipes can be obtained at one time. Based on this original intention, this device that we designed is as follows, and concrete structure is:

the device comprises a supporting module, a positioning module and a detection module.

And the positioning module and the detection module are fixedly arranged on the support module.

A support module: the supporting module is used for supporting the device. The support module comprises a bottom plate 1 and a vertical plate 2, the bottom side of the vertical plate 2 is fixed on the bottom plate 1, the vertical plate 2 is arranged in an inclined mode, an included angle between the vertical plate 2 and the bottom plate 1 is 70 degrees, under the condition that the pipe fitting is drawn close to the vertical plate 2, the pipe fitting can fall down on the positioning module, and rotation is achieved under the action of gravity in a matched mode.

A positioning module: the positioning module comprises two rotating shafts 3 vertically fixed on the vertical plate 2, the rotating shafts 3 are arranged in parallel in a left-right parallel mode, carrier rollers 4 driven by electric power are matched on the rotating shafts 3 in a rotating mode, the two carrier rollers 4 are led to rotate, and the two carrier rollers 4 are driven by motors in the example. The device is mainly used for improving the rotation effect of a plastic pipe sample. Without being limited to the case of this example, one of them can also be set as the driving idler 4 through the motor drive, and the other one is the driven idler 4, so that the cost is reduced.

The surface of the carrier roller 4 is provided with a groove extending along the length direction of the carrier roller, and the groove is used for increasing the friction force with a sample plastic pipe.

In this example, the gap between two bearing rollers 4 is (the minimum distance of external diameter) 1.8cm, can be applicable to the plastic pipe of measurement most model.

The positioning module further comprises a supporting block 5, the supporting block 5 is fixed on the vertical plate 2 and is arranged between the upper portions of the two rotating shafts 3 in the middle, the supporting block 5 is provided with a supporting surface perpendicular to the rotating shafts 3, a PTFE polytetrafluoroethylene coating is arranged on the supporting surface, the friction coefficient of the supporting block is extremely low, and the supporting block is used for assisting in supporting one end of a sample plastic pipe fitting and does not influence the rotation of the sample plastic pipe fitting.

The positioning module has the function of automatically positioning the plastic pipe fitting to the detection position. The plastic pipe is directly placed on the two carrier rollers 4, the rotating shaft 3 is inclined, the supporting surfaces of the carrier rollers 4 are also inclined, and the plastic pipe automatically approaches and abuts against the supporting surface of the supporting block 5 due to the self gravity of the plastic pipe; and two bearing rollers 4 support plastics tubular product through the relative inside curved surface in its top, along with bearing roller 4's rotation, its position placed in the middle between two bearing rollers 4 of sample plastics tubular product automatic adjustment to quick, automatic counterpoint to waiting to detect the state.

The structure eliminates the error of manually placing the sample, and is efficient and quick. People can directly place the sample between the carrier rollers 4, which is very convenient and easy to operate.

A detection module: the detection module comprises an upper module, a lower module and a limiting module.

Go up the module including the upper guideway pole 6 of vertical fixation on riser 2, the extending direction of upper guideway pole 6 is parallel with pivot 3, just upper guideway pole 6 sets up in the position placed in the middle of two pivot 3 tops, sliding fit has last sliding block 7 on the upper guideway pole 6, it is spacing with 6 circumference of upper guideway pole that last sliding block 7 passes through the ball spline pair, it is 4 to go up sliding block 7, the bottom of going up sliding block 7 is equipped with detection head 8 placed in the middle, it is distance measuring sensor to go up detection head 8. And a spiral spring piece 9 is arranged between the adjacent upper sliding blocks 7. For spacing the plurality of upper sliders 7 equidistantly or equidistantly-like.

Lower module is including lower guide rail pole 10 of vertical fixation on riser 2, the extending direction of lower guide rail pole 10 is parallel with pivot 3, just guide rail pole 10 sets up in the position placed in the middle of two pivot 3 below down, sliding fit has lower slider 11 on the guide rail pole 6, it is spacing with lower guide rail pole 10 circumference that lower slider 11 passes through the ball spline pair, lower slider 11 is 4, the bottom of going up slider 7 is equipped with down detection head 12 placed in the middle, it is range finding sensor to go up detection head 8. And a spiral spring piece 9 is arranged between the adjacent upper sliding blocks 7. For spacing the plurality of upper sliders 7 equidistantly or equidistantly-like.

The limiting module comprises a limiting plate 13, a screw 14 and a large nut 15.

The screw 14 is vertically fixed on the vertical plate 2, and the screw 14 is positioned above the upper guide rail rod 6.

The upper portion of limiting plate 13 is equipped with the last dog 16 that is used for making upper guideway pole 6 run through, the lower part of limiting plate 13 is equipped with the lower dog 17 that is used for making lower guideway pole 10 run through, last dog 16 is used for blocking the last slider 7 that is located the outside in the outer end, lower dog 17 is used for blocking the lower slider 11 that is located the outside in the outer end. And the middle part of the limiting plate 13 is provided with a yielding window for the positioning module to pass through. The top end of the limiting plate 13 is provided with a through hole for the screw 14 to penetrate through.

The large nut 15 is in threaded fit with the screw 14 and is used for restraining the position of the limiting plate 13 at the outer side of the limiting plate 13.

As shown in the above-mentioned structure and the accompanying drawings, the limiting plate 13 can restrict the outermost distance between the upper slider 7 and the lower slider 11 at the outermost side, and before a batch of samples are measured, the entire detection range of the plurality of detection heads (i.e., the position of the outermost detection head) is adjusted to a distance slightly shorter than the length of the batch of samples, so that the spring member can automatically separate the plurality of detection heads to correspond to data at a plurality of positions of the detected samples.

The above structure is further explained below in connection with a specific use of the detection procedure.

When the specific application, the relevant quality parameters of the PP pipe are detected. The length of a batch of pp tube samples to be inspected is about 30cm, the large nut 15 is adjusted to inwards press the limiting plate 13, the upper stop block 16 and the lower stop block 17 on the limiting plate 13 further inwards press the upper sliding block 7 and the lower sliding block 11 on the outermost side, the distance between the sliding block on the outermost side and the sliding block on the innermost side is 25cm, and the length of the samples can be guaranteed.

The detection head corresponding to each group up and down is a detection position, the upper detection head 8 and the lower detection head 12 are started, and each detection position obtains two distance values D for calibration and preliminary correspondence.

Specifically, when measuring one by one, the sample PP pipe is directly placed between the two carrier rollers 4. The sample PP pipe automatically falls on the supporting surface of the supporting block 5 under the action of body gravity and is naturally positioned at the middle position between the two carrier rollers 4, so that the sample PP pipe is flushed with the upper detection head 8 above and the lower detection head 12 below. The upper and lower inspection heads 12 are enabled to inspect the diameter data of the pipe.

The distance between the upper detection head 8 and the lower detection head 12 is a fixed value D, four detection positions from inside to outside are respectively defined as 1-4 detection positions, in view of the dispersion effect of the spiral spring part 9 of the structure, each detection position is correspondingly provided with an upper detection head and a lower detection head, the corresponding detection heads obtain the distance D ' from the upper side surface of the sample tube through the upper detection head 8, obtain the distance D ' from the bottom surface of the sample tube through the lower detection head 12, and can be used for detecting the position of the sample tube through D-D ' -D ″The outer diameter data on the current detection position can be obtained. Four detection bits respectively obtain four groups of data, namely d₁＝(D₁-d₁'-d₁”)，d₂＝(D₂-d₂'-d₂”)，d₃＝(D₃-d₃'-d₃”)，d₄＝(D₄-d₄'-d₄"), the four groups of data respectively correspond to the external diameter data d on the four positions of the sample pipe fitting₁，d₂，d₃，d₄And whether the difference value between the four groups of data is in an allowable range or not can be used for assisting in judging whether the sample PP pipe has quality defects with different thicknesses or not.

The upper detection head 8 and the lower detection head 12 acquire distance data every 2s, the two carrier rollers 4 rotate clockwise, so that the sample PP pipe is driven to rotate slowly through friction, each sample keeps detecting for 1 minute, the outer diameter data of a plurality of positions can be acquired at each point along the circumferential direction, and the problems that whether the section of the sample PP pipe is a standard circle or not, whether the section is an ellipse or not and the like can be judged in an auxiliary mode through the fact that whether the difference value of the outer diameter data acquired at each detection position is within an allowable range or not can be judged.

As can be known from the above explanation, the device is used for detecting the outer diameter and other relevant data of the plastic pipe fitting, and has the following advantages:

Example 2: plastic pipe outer diameter detector

Unlike embodiment 1, in order to maintain the spacing between the plurality of upper/lower detection heads 12, the respective detection heads are adapted to change with the change in the overall measurement distance and maintain an equidistant array. The spiral spring part 9 can also be replaced by a rhombic cross-shear type structure, and the specific structure is as follows:

the four connecting rods are hinged to form a rhombic cross-shearing type unit, and the hinged positions of the two ends of the cross-shearing type unit are hinged to the upper sliding block 7 or the lower sliding block 11, so that each upper sliding block 7 or each lower sliding block 11 is supported at equal intervals and can be changed along with the change of the overall distance.

This configuration has the advantage of ensuring accurate equidistant spacing of each head and alignment of the upper and lower heads 12.

However, the structure is inevitably somewhat complicated as compared with embodiment 1, and maintenance of parts is troublesome. Embodiment 1 directly uses common spiral straight line spring part, and the installation is simple and convenient, and is favorable to realizing the modular use, through the spiral spring part 9 of changing different length to combine the upper/lower detection head 12 of different quantity, just can change the number that detects the position, thereby can freely set up the detection density of unit distance.

Claims

1. Plastics tubular product external diameter detector, its characterized in that includes:

2. The outer diameter detector for plastic pipes according to claim 1, wherein the upper detecting head has an adjustable distance therebetween, and the lower detecting head has an adjustable distance therebetween.

3. The outer diameter detector of the plastic pipe according to claim 2, wherein the detection module further comprises a limit module;

4. The outer diameter detector of the plastic pipe as claimed in claim 1, further comprising a support module, wherein the support module comprises a bottom plate and a vertical plate, the vertical plate is obliquely fixed on the bottom plate, the angle of inclination between the vertical plate and the bottom plate is 80-65 °, and the lower end of the rotating shaft is vertically fixed on the vertical plate.

5. The outer diameter detector for the plastic pipe according to claim 1, wherein a plurality of grooves are distributed on the surface of the carrier roller along the circumferential direction of the carrier roller, and the extending direction of the grooves corresponds to the length direction of the carrier roller.

6. The plastic pipe outer diameter detector according to claim 4, wherein the support block is fixed on the vertical plate, the support block is located at a central position above the two support rollers, a support surface perpendicular to the rotating shaft is arranged on the support block, the support surface is located on one side of the lower end of the support roller, and a PTFE coating is arranged on the support surface.