Detection equipment for large reducing elbow

Abstract

The utility model discloses a detection device for a large reducing elbow, which belongs to the technical field of elbow detection and comprises a base, an elbow placing box is fixedly mounted on the outer side of the upper surface of the base, an advancing assembly is fixedly mounted in the middle of the upper surface of the base and comprises a stepping motor, and a swing rod is fixedly mounted on the outer wall of the output end of the stepping motor. The outer end of the swing rod is fixedly provided with one end of an arc-shaped rod, the other end of the arc-shaped rod is fixedly provided with a mounting plate, and the mounting plate is fixedly provided with a detection assembly. The detection assembly is driven to move at a constant speed along the axis of the elbow, spiral continuous scanning can be carried out on the inner wall of the elbow in combination with the rotation motion of the detection head, and the pressure sensor converts radial pressure borne by the detection head into an electric signal in real time, so that the radius value of each position is accurately inverted, and the detection accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to elbow detection technical field, and especially provide a detection equipment of big reducing elbow. BACKGROUND

[0002] In the pipeline system of many industrial fields such as petrochemical industry, air conditioning refrigeration, shipbuilding, elbow is the indispensable key connecting piece, and bears the important function of changing the flow direction of fluid or gas.For big reducing elbow (i.e. the elbow of the significant difference of the diameter of inlet and outlet), the processing quality of the inner wall profile is particularly critical. The smooth transition of the inner wall radius, the uniformity of each cross section roundness directly determines the size of fluid resistance, energy loss rate and the operation efficiency and long-term stability of the whole pipeline system. If there are local depressions, protrusions or ellipticity defects in the elbow, vortex, vibration is easy to cause, and even leads to pipe wall wear and system failure.

[0003] At present, the quality detection of elbow, especially the complex big reducing elbow, still highly depends on traditional means. Common methods include using vernier caliper, inside diameter micrometer and other manual measuring tools for discrete point measurement, or using "go-no-go gauge" based on fixed size for passability verification. These traditional methods have many limitations: first, manual measurement is inefficient, it is difficult to realize full-size continuous scanning, and the results are easily affected by the experience and subjective judgment of the operator, with poor repeatability and low data reliability. Secondly, the go-no-go gauge can only give a binary conclusion of "qualified" or "unqualified", and cannot provide accurate quantitative data, let alone depict the continuous change curve of the inner wall radius and the roundness error of the specific position. Thirdly, these rigid detection tools are easy to collide with the inner wall of the elbow in repeated operation, causing scratches, and introducing secondary damage. Therefore, a detection equipment of big reducing elbow is needed. UTILITY MODEL CONTENTS

[0004] To solve the above problems, the utility model provides a detection equipment of big reducing elbow.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of a detection equipment of big reducing elbow, which comprises a base, an elbow placing box is fixedly installed on the upper surface outer side of the base, a traveling assembly is fixedly installed on the upper surface middle part of the base, the traveling assembly comprises a stepping motor, and the stepping motor is located at the axis center of the elbow placing box, an oscillating rod is fixedly installed on the output end outer wall of the stepping motor, one end of an arc-shaped rod is fixedly installed on the outer end of the oscillating rod, the other end of the arc-shaped rod is fixedly installed with a mounting plate, and a detection assembly is fixedly installed on the mounting plate.

[0006] The detection assembly comprises a motor, the motor is fixedly installed on the mounting plate, an output end of the motor is fixedly installed with a rotating block, the center of the rotating block is located on the axis of the elbow placing box, a fixed cylinder is fixedly installed on the middle part of the rotating block, a pressure sensor is fixedly installed on the bottom end of the inner cavity of the fixed cylinder, a movable rod is movably assembled in the fixed cylinder, and a spring is fixedly installed between the pressure sensor and the movable rod.

[0007] Further, the outer end of the movable rod is fixedly installed with a detection head.

[0008] Further, the arc-shaped rod is concentric with the axis of the elbow placing box, and the diameter of the arc-shaped rod is smaller than the diameter of the axis of the elbow placing box.

[0009] Further, a supporting table is fixedly installed between the lower side of the outer wall of the elbow placing box and the base, and a tapered end face is formed in the large-diameter one end of the elbow placing box.

[0010] Further, a ring-shaped end cover is fixedly installed on the small-diameter one end of the elbow placing box, and the inner diameter of the ring-shaped end cover is smaller than the inner diameter of the elbow.

[0011] Further, a supporting ring is sleevedly assembled on the swing rod, a supporting rod is fixedly installed on the lower surface of the supporting ring, an arc-shaped sliding groove is formed in the upper surface of the base, and the lower end of the supporting rod is located in the arc-shaped sliding groove.

[0012] Further, a supporting column is fixedly installed on the upper surface of the base, a through groove is formed in the upper end of the supporting column, and the arc-shaped rod passes through the through groove.

[0013] Further, strain gauges are uniformly embedded and installed on the inner walls of the elbow placing box.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model realizes comprehensive automation and high-precision quantification of the detection process, the detection assembly is uniformly moved along the elbow axis by the advancing assembly driven by the stepping motor, and the inner wall of the elbow can be continuously scanned in a spiral manner by combining the rotary motion of the detection head, the radial pressure received by the detection head is converted into an electric signal in real time by the pressure sensor, so that the radius value of each position is accurately inverted, the precision of detection is improved, in addition, the control center or the processor can generate a complete radius change curve and roundness data, and provide objective and quantitative basis for quality evaluation.

[0016] The utility model embeds strain gauges in the inner wall of the elbow placing box, when the elbow is placed, the strain gauges can sensitively perceive the shape of the outer wall, synchronous detection of the outer contour is realized, the function of internal and external measurement is realized, and a more comprehensive product quality view is provided. DRAWINGS

[0017] Figure 1 It is one of the three-dimensional schematic views of the utility model.

[0018] Figure 2 It is the second three-dimensional schematic view of the utility model.

[0019] Figure 3 It is the front view of the utility model.

[0020] Figure 4 It is the cross-sectional view of the utility model in A-A direction. Figure 3

[0021] Figure 5 It is the sectional view of the detection assembly of the utility model.

[0022] The reference signs include: 1, base, 11, arc-shaped sliding groove, 12, support column, 2, elbow placing box, 21, support table, 22, conical end face, 23, annular end cover, 3, traveling assembly, 31, swing rod, 32, arc-shaped rod, 33, mounting plate, 34, support ring, 35, support rod, 4, detection assembly, 41, motor, 42, rotating block, 43, fixed cylinder, 44, pressure sensor, 45, spring, 46, movable rod, 47, detection head. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Referring to Figures 1 to 5 A detection equipment of large-diameter-change elbow, including base 1, the outer side of the upper surface of base 1 is fixedly installed with elbow placing box 2, the middle part of the upper surface of base 1 is fixedly installed with traveling assembly 3, traveling assembly 3 includes stepper motor, and the stepper motor is located at the axis center of elbow placing box 2, the output end outer wall of stepper motor is fixedly installed with swing rod 31, one end of arc-shaped rod 32 is fixedly installed on the outer end of swing rod 31, and the other end of arc-shaped rod 32 is fixedly installed with mounting plate 33, and detection assembly 4 is fixedly installed on mounting plate 33.

[0025] The inner wall of elbow placing box 2 is uniformly embedded with strain gauges, the inner cavity shape of elbow placing box 2 is same with the outer wall shape of large-diameter-change elbow, after the elbow is placed into elbow placing box 2, the elbow will be in contact with strain gauges, through the deformation signal of strain gauges, the control center or processor can judge the outer wall shape of elbow, and the preliminary detection of the outer wall of elbow is completed. ​

[0026] The characteristics of the stepper motor enable precise rotation and positioning control. Through the operation of the stepper motor and the transmission of the swing rod 31 and the arc-shaped rod 32, the detection assembly 4 can be driven to move on the axis of the elbow placing box 2, and then the inner wall of the elbow in the elbow placing box 2 can be detected.

[0027] The detection assembly 4 comprises a motor 41 fixedly installed on the mounting plate 33. The output end of the motor 41 is fixedly installed with a rotating block 42, the center of which is located on the axis of the elbow placing box 2. The middle part of the rotating block 42 is fixedly installed with a fixed cylinder 43. The inner cavity bottom end of the fixed cylinder 43 is fixedly installed with a pressure sensor 44. The fixed cylinder 43 is movably assembled with a movable rod 46. The pressure sensor 44 and the movable rod 46 are fixedly installed with a spring 45. The outer end of the movable rod 46 is fixedly installed with a detection head 47.

[0028] The detection head 47 of the detection assembly 4 contacts with the inner wall of the elbow. When contacting, the spring 45 is compressed. The pressure sensor detects the pressure information in real time. The control center or the processor can determine the size of the corresponding position in the elbow according to the pressure information and the operation of the stepper motor and the motor 41, and complete the detection of the size of the inner wall of the elbow.

[0029] When the spring 45 is not subjected to external force, the position of the detection head 47 is located outside the large-diameter side of the elbow. When the detection head 47 moves into the elbow, the spring 45 will be subjected to pressure. The operation of the stepper motor will drive the detection head to move from one end of the large-diameter side of the elbow to the small-diameter side. The change of the size of the elbow will drive the detection head 47 to move inward, so that the pressure data detected by the pressure sensor gradually increases. According to the curve change, the information of the change of the inner diameter of the elbow can be obtained. The rotation of the motor 41 will drive the detection head 47 to rotate, so that the roundness of a certain position in the elbow can be detected.

[0030] The control center or the processor can generate a complete radius change curve and roundness data, which can provide objective and quantitative basis for quality evaluation.

[0031] Specifically, the arc-shaped rod 32 is concentric with the axis of the elbow placing box 2, and the diameter of the arc-shaped rod 32 is smaller than the diameter of the axis of the elbow placing box 2. The diameter of the arc-shaped rod 32 is limited to ensure that the trajectory of the detection assembly 4 is on the axis of the elbow placing box 2.

[0032] Specifically, the support table 21 is fixedly installed between the outer wall lower side of the elbow placing box 2 and the base 1. The large-diameter end of the elbow placing box 2 is provided with a tapered end face 22.

[0033] The detection head 47 can be moved into the elbow through the guidance of the tapered end face 22, or can be manually operated.

[0034] Specifically, the small-diameter end of the elbow placing box 2 is fixedly provided with an annular end cover 23, and the inner diameter of the annular end cover 23 is smaller than the inner diameter of the elbow.

[0035] The annular end cover 23 is used to limit the position of the elbow, and in some cases, the inner diameter of the annular end cover 23 needs to be equal to the inner diameter of the elbow to avoid hindering the passing of the detection assembly 4.

[0036] Specifically, the swing rod 31 is sleeved with a supporting ring 34, the lower surface of the supporting ring 34 is fixedly provided with a supporting rod 35, the upper surface of the base 1 is provided with an arc-shaped sliding groove 11, and the lower end of the supporting rod 35 is located in the arc-shaped sliding groove 11.

[0037] Specifically, the upper surface of the base 1 is fixedly provided with a supporting column 12, the upper end of the supporting column 12 is provided with a through slot, and the arc-shaped rod 32 passes through the through slot.

[0038] The structure of the supporting ring 34, the supporting rod 35 and the supporting column 12 realizes double support of the arc-shaped rod 32, guarantees the stability of the rotation of the arc-shaped rod 32, and further guarantees the stability of the detection assembly 4.

[0039] In actual application, the elbow placing box 2 can be provided as two halves for splicing installation, and the position of the supporting column 12 can also be adjusted.

[0040] The above is only the preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, many changes can be made in the specific implementation mode and application range, as long as these changes do not deviate from the concept of the present application, and all belong to the protection scope of the present application.

Claims

1. An inspection apparatus for a large reducing bend, characterized by: The utility model provides a bend placing box, the utility model discloses a bend placing box, including base, the upper surface lateral fixed mounting of base has the elbow placing box, the upper surface middle fixed mounting of base has the travel subassembly, the travel subassembly includes step motor, and step motor is located the axis center of elbow placing box, the output end outer wall fixed mounting of step motor has swing rod, the outer end fixed mounting of swing rod has the one end of arc rod, and the other end fixed mounting of arc rod has the mounting plate, the fixed mounting of detection subassembly on mounting plate is reached, The utility model discloses a bend placing box, the utility model discloses a bend placing box, including base, the upper surface lateral fixed mounting of base has the elbow placing box, the upper surface middle fixed mounting of base has the travel subassembly, the travel subassembly includes step motor, and step motor is located the axis center of elbow placing box, the output end outer wall fixed mounting of step motor has swing rod, the outer end fixed mounting of swing rod has the one end of arc rod, and the other end fixed mounting of arc rod has the mounting plate, the fixed mounting of detection subassembly on mounting plate is reached, 2. The detection apparatus of a large-diameter reducing elbow according to claim 1, characterized by: The outer end fixed mounting of swing rod has detection head.

3. The inspection apparatus of a large reducing elbow as defined in claim 1, characterized by: The arc rod is concentric with the axis of the elbow placing box, and the diameter of the arc rod is less than the diameter of the axis of the elbow placing box.

4. The inspection apparatus for a large reducing elbow as defined in claim 1, wherein: The outer wall lower side of the elbow placing box and the base are fixedly installed with a support table, and a tapered end face is formed in one end of the large-diameter end of the elbow placing box.

5. The inspection apparatus of a large reducing elbow as defined in claim 1, wherein: The small-diameter end of the elbow placing box is fixedly installed with an annular end cover, and the inner diameter of the annular end cover is less than the inner diameter of the elbow.

6. The inspection apparatus of a large reducing elbow as defined in claim 1, wherein: A support ring is sleeved and assembled on the swing rod, the lower surface of the support ring is fixedly installed with a support rod, and an arc-shaped sliding groove is formed in the upper surface of the base, and the lower end of the support rod is located in the arc-shaped sliding groove.

7. The inspection apparatus of a large reducing elbow as defined in claim 1, wherein: The upper surface of the base is fixedly installed with a support column, a through groove is formed in the upper end of the support column, and the arc-shaped rod passes through the through groove.

8. The inspection apparatus of a large reducing elbow as defined in claim 1, wherein: Strain gauges are uniformly embedded and installed on the inner walls of the elbow placing box.

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