A pressure vessel corner detection mechanism

Abstract

This utility model relates to a pressure vessel edge detection mechanism, including a shell, a scale plate, a DC geared motor, a battery, a push-button switch, a first spool with thermal paper wound on it, an empty second spool, a detection rod, a compression spring, an indicator block, and an indicator needle. The beneficial effects are: an indicator needle is installed on the back of the detection rod; the DC geared motor drives the second spool to rotate and wind the thermal paper, causing the thermal paper to move from the first spool to the second spool at the end of the indicator needle. The indicator needle forms a scratch on the thermal paper. If the detection rod moves, it will cause the indicator needle to move in a direction perpendicular to the direction of movement of the thermal paper, thus forming a zigzag mark on the thermal paper. Even if the inspector does not observe the scale value change due to visual fatigue, they can still observe whether there are abnormal areas on the edges of the pressure pipeline through the scratches on the thermal paper.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment, and in particular to a pressure vessel corner testing mechanism. Background Technology

[0002] During the production of pressure vessels, it is necessary to inspect the edges and corners. If the edges and corners are too large, they will cause local bending stress and membrane stress to be superimposed, which will damage the vessel. Therefore, an edge and corner measuring ruler is needed to inspect the edges and corners to maintain the safety of the pressure vessel.

[0003] A utility model patent with application number 202322123446.0 discloses a pressure vessel corner inspection ruler. Through the arrangement of a limiting plate, a scale plate, a limiting block, a measuring plate, and a parallel plate, the scale plate is installed via the limiting plate during use. The scale plate is then moved along the corner. During movement, the measuring plate and the parallel plate are on the same plane. The operator can judge whether the corner is straight and parallel by observing the distance between the measuring plate, the parallel plate, and the pressure vessel. This pressure vessel corner inspection ruler allows for direct observation of whether the corner is straight and parallel, but it cannot record the readings. Furthermore, the inspector needs to constantly monitor the scale plate during the inspection process, which can easily lead to visual fatigue causing the operator to miss changes in the scale value and overlook abnormal corner areas. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned problems in the existing technology and provide a pressure vessel edge detection mechanism.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] A pressure vessel edge detection mechanism includes a housing and a scale plate. The housing has a partition in the middle that divides the housing into an equipment compartment and a working compartment. The scale plate is inserted into the opening on the front of the working compartment.

[0007] The equipment compartment is equipped with a DC geared motor, a battery, and a push-button switch, which are connected by wires to form a closed circuit.

[0008] A passive connector, a driving connector, and two round rods are installed on the partition. The driving connector is interference-fitted with the power output shaft of the DC gear reducer motor. A first roll with thermal paper is fitted on the passive connector, and an empty second roll is fitted on the driving connector. One end of the thermal paper passes over the two round rods in sequence and is then glued to the side of the second roll with adhesive.

[0009] Two bearings with seats are installed on the back of the scale plate, and the head of the first scroll and the head of the second scroll are respectively engaged with the inner ring of the two bearings with seats.

[0010] The scale plate has two parallel guide grooves. A detection rod that can move along the axial direction of the guide groove is installed in each guide groove. A compression spring that can extend and retract along the axial direction of the guide groove is sandwiched between the tail end of the detection rod and the guide groove. An indicator block is provided on the front of the detection rod and an indicator needle is provided on the back of the detection rod. The end of the indicator needle abuts against the thermal paper located between the two round rods.

[0011] Preferably, the working chamber is further provided with a support assembly for supporting the thermal paper between the two round rods. The support assembly includes a support plate, two symmetrical connecting plates (first and second), and two compression springs (second). The first connecting plate is vertically fixed to the inner outer shell of the working chamber, and the second connecting plate is vertically fixed to the back of the support plate. The head of the first connecting plate is provided with a protruding slider, and the second connecting plate is provided with a sliding groove. The slider slides into the sliding groove, and the second compression spring is sandwiched between the back of the support plate and the outer shell.

[0012] Preferably, a sponge block is attached to each of the two back sides of the scale plate, the thickness of the sponge block is equal to the length of the indicator needle, and the distance between the two sponge blocks is less than the width of the support plate.

[0013] The scale plate has a scale indicating the distance the indicator block moves printed on the center of the front side, and the initial position of the indicator block is aligned with the 0 mark of the scale.

[0014] The scale plate has a limit strip installed on its front side, and each end of the limit strip has an outwardly protruding buckle block. The outer shell on both sides of the opening on the front of the working chamber has a buckle groove, and the buckle block engages with the buckle groove.

[0015] The detection rod has a protruding front limiting block on its front side, and the indicator block is fixed to the center of the front limiting block. When the detection rod is in its initial state, the limiting strip abuts against the front limiting block.

[0016] The scale plate has a concave groove on each side, and the groove is parallel to the long axis of the scale plate. The outer shell on both sides of the opening on the front of the working chamber has a raised strip, which slides in conjunction with the groove.

[0017] The partition plate is provided with two bearing mounting rings, each bearing mounting ring is equipped with a ball bearing, the passive joint is interference-fitted in the inner ring of one of the ball bearings, and the drive joint is interference-fitted in the inner ring of the other ball bearing.

[0018] The beneficial effects of this utility model are as follows: An indicator needle is set on the back of the detection rod. A DC gear reducer motor drives the second roller to rotate and wind the thermal paper, so that the thermal paper moves from the first roller to the second roller at the end of the indicator needle. The indicator needle forms a scratch on the thermal paper. If the detection rod moves, it will drive the indicator needle to move in a direction perpendicular to the direction of movement of the thermal paper, thereby forming a zigzag mark on the thermal paper. Even if the inspector does not observe the change of the scale value due to visual fatigue, he can still observe whether there are abnormal areas on the edges of the pressure pipe through the scratches on the thermal paper. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the assembly structure of the pressure vessel corner detection mechanism in this utility model;

[0021] Figure 2 This is a schematic diagram of the disassembled pressure vessel corner detection mechanism in this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the equipment compartment in this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the working chamber in this utility model;

[0024] Figure 5 This is a schematic diagram of the passive connector, drive connector, reel one, reel two, round rod, and thermal paper in this utility model;

[0025] Figure 6 This is a schematic diagram of the supporting component in this utility model;

[0026] Figure 7 This is a first-view structural diagram of the combination of the graduated toothed plate and the detection rod in this utility model;

[0027] Figure 8 This is a second-view structural diagram of the combination of the scale toothed plate and the detection rod in this utility model;

[0028] Figure 9 This is a schematic diagram of the structure of the graduated toothed plate portion after being cut apart and combined with the detection rod in this utility model;

[0029] Explanation of the numbers in the diagram: 1. Outer shell; 101. Equipment compartment; 102. Working compartment; 103. Partition plate; 1031. Bearing mounting ring; 104. Raised strip; 105. Snap-fit ​​groove; 106. Compartment cover; 2. Scale plate; 201. Strip groove; 202. Limiting strip; 2021. Snap-fit ​​block; 203. Bearing with seat; 204. Guide groove; 205. Scale; 3. DC gear reducer motor; 4. Battery; 5. Push-button switch; 6. USB-C charging interface; 7. Ball bearing; 8. Passive connector; 801. Socket connector; 802. Drive connector. Head 9, Socket 2 901, Round rod 10, Thermal paper 11, Roll 1 12, Socket 1 1201, Roll 2 13, Socket 2 1301, Detection rod 14, Indicator block 1401, Indicator needle 1402, Front limit block 1403, Rear limit block 1404, Compression spring 1 15, Support assembly 16, Support plate 1601, Connecting plate 1 1602, Connecting plate 2 1603, Compression spring 2 1604, Slider 1605, Slide groove 1606, Sponge block 17. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] like Figures 1 to 9 As shown, a pressure vessel corner detection mechanism includes a housing 1 and a rectangular scale plate 2. A partition 103 is provided in the middle of the housing 1, dividing the housing into an equipment compartment 101 and a working compartment 102. The scale plate 2 is inserted into the opening on the front of the working compartment 102. Specifically, a concave groove 201 is provided on each side of the scale plate 2, and the groove 201 is parallel to the long axis of the scale plate 2. A protruding strip 104 is provided on each side of the housing on the front of the working compartment 102. The protruding strip 104 slides with the groove 201 to prevent the scale plate 2 from sliding along the opening on the front of the working compartment 102. The scale plate 2 moves perpendicular to the direction of the scale plate 2. A limit strip 202 is installed on the front of the scale plate 2. A buckle block 2021 protruding outward is set at each end of the limit strip 202. A buckle groove 105 is opened on the outer shell on both sides of the opening on the front of the working chamber 102. The buckle block 2021 engages with the buckle groove 105 to prevent the scale plate 2 from moving along its long axis. When it is necessary to remove the scale plate 2 from the working chamber 102, the outer shells on both sides of the working chamber 102 are pulled in opposite directions to disengage the buckle block 2021 from the buckle groove. Then the scale plate 2 is pulled out along the direction of the strip groove 201.

[0032] The equipment compartment 101 is equipped with a DC geared motor 3, a battery 4, and a push-button switch 5. The DC geared motor 3, battery 4, and push-button switch 5 are connected by wires to form a closed circuit. The button part of the push-button switch 5 extends out of the outer casing 1 through a through hole. Pressing the push-button switch 5 causes the battery to supply power to the DC geared motor 3, which then rotates its power output shaft. A USB-C charging port 6 is installed on the outer casing 1 on one side of the equipment compartment 101. The USB-C charging port 6 is connected to the battery 4 by wires, so that the battery 4 of this pressure vessel corner detection mechanism can be charged using a mobile phone charging cable and charging head.

[0033] The equipment compartment 101 is fitted with a compartment cover 106 that is connected to the outer casing 1 by a snap fastener at the compartment opening.

[0034] A passive connector 8, a drive connector 9, and two round rods 10 are installed on the partition 103. Two bearing mounting rings 1031 are provided on the partition 103, and a ball bearing 7 is installed in each bearing mounting ring 1031. The passive connector 8 is interference-fitted in the inner ring of one of the ball bearings 7, and the drive connector 9 is interference-fitted in the inner ring of the other ball bearing 7. The drive connector 9 is interference-fitted with the power output shaft of the DC gear reducer motor 3, and the power output shaft of the DC gear reducer motor 3 is a D-type shaft, ensuring that the drive connector 9 rotates together with the power output shaft of the DC gear reducer motor 3.

[0035] A passive connector 8 has a spool 12 with thermal paper 11 rolled on it. The head of the passive connector 8 has a square-section socket 801, and the tail of the spool 12 has a square-section slot 1201. The socket 801 is inserted into the slot 1201 to make the spool 12 fit onto the passive connector 8, ensuring that the passive connector 8 and the spool 12 rotate together. A drive connector 9 has an empty spool 13. The head of the drive connector 9 has a square-section socket 901, and the tail of the spool 13 has a square-section slot 1301. The socket 901 is inserted into the slot 1301 to make the spool 13 fit onto the drive connector 9, ensuring that the spool 13 and the drive connector 9 rotate together. One end of the thermal paper 11 passes over two round rods 10 and is then glued to the side of the spool 13 with adhesive.

[0036] When the DC geared motor 3 is working, it drives the drive connector 9 to rotate, and rolls the thermal paper 1 on the first roll 12 onto the second roll 13.

[0037] Two bearings 203 with mounting plates are installed on the back of the scale plate 2. The head cross-section of the first spool 12 and the head cross-section of the second spool 13 are both circular. The head of the first spool 12 and the head of the second spool 13 are respectively engaged with the inner rings of the two bearings 203 with mounting plates. The bearings with mounting plates support and limit the head of the first spool 12 and the head of the second spool 13 to improve the stability of the first spool 12 and the second spool 13 when rotating.

[0038] The scale plate 2 has two parallel guide grooves 204, and the guide grooves 204 are parallel to the long axis of the scale plate 2. A detection rod 14 that can move along the axial direction of the guide groove is installed in each guide groove 204. A compression spring 15 that can extend and retract along the axial direction of the guide groove 204 is sandwiched between the tail end of the detection rod 14 and the guide groove 204. An indicator block 1401 is provided on the front side of the detection rod 14, and an indicator needle 1402 is provided on the back side of the detection rod 14. The end of the indicator needle 1402 abuts against the thermal paper 11 located between the two round rods 10.

[0039] To reduce the risk of the indicator needle 1402 scratching the thermal paper 11, the end of the indicator needle 1402 is polished into a smooth hemispherical surface.

[0040] The working chamber 102 is also equipped with a support assembly 16 that supports the thermal paper 11 between the two round rods 10. The support assembly 16 includes a support plate 1601, two symmetrical connecting plates 1602, two symmetrical connecting plates 1603, and two compression springs 1604. The connecting plates 1602 are vertically fixed to the inner shell 1 of the working chamber 102, and the connecting plates 1603 are vertically fixed to the back of the support plate 1601. The head of the connecting plate 1602 is provided with a protruding slider 1605. A groove 1606 is provided on the 03. The slider 1605 slides in the groove 1606, allowing the support plate 1601 to move back and forth along the length of the groove 1606. A compression spring 1604 is sandwiched between the back of the support plate 1601 and the outer shell 1. The restoring force of the compression spring 1604 makes the support plate 1601 fit tightly against the back of the thermal paper 11, so that the support plate 1601 provides support for the back of the thermal paper 11, ensuring that the thermal paper 11 forms a scratch on the thermal paper when it passes the end of the indicator needle 1402.

[0041] A sponge block 17 is attached to each side of the back of the scale plate 2. The thickness of the sponge block 17 is equal to the length of the indicator needle 1402, and the distance between the two sponge blocks 17 is less than the width of the support plate 1601. The two sponge blocks 17 are used to support the thermal paper and the support plate to prevent the thermal paper 11 from being squeezed too much by the support plate 1601 and being scratched by the indicator needle.

[0042] The front center of the scale plate 2 is printed with a scale 205 indicating the distance the indicator block moves. The initial position of the indicator block 1401 is aligned with the 0 mark line of the scale.

[0043] The front of the detection rod 14 is provided with a protruding front limit block 1403. The indicator block 1401 is fixed to the center of the front of the front limit block 1403. When the detection rod 14 is in the initial state, the limit strip 202 abuts against the front limit block 1403 to prevent the detection rod 14 from disengaging from the guide groove 204.

[0044] The back of the detection rod 14 has a protruding rear limit block 1404, and the indicator needle 1402 is fixed to the center of the back of the rear limit block 1404.

[0045] The DC geared motor in this embodiment is model JGB37-520, with a voltage of 6 volts and a speed of 10 revolutions per minute.

[0046] Working principle: The DC geared motor drives the second roller to rotate and wind the thermal paper. The thermal paper moves from the first roller to the second roller at the end of the indicator needle. The indicator needle forms a scratch on the thermal paper. If the detection rod moves, it will drive the indicator needle to move in a direction perpendicular to the direction of movement of the thermal paper, thereby forming a zigzag mark on the thermal paper.

[0047] Even if the inspector does not observe the change in the scale value due to visual fatigue, they can still observe whether there are abnormal areas on the edges and corners of the pressure pipe through the scratches on the thermal paper.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A pressure vessel corner detection mechanism, characterized by: It includes an outer shell and a scale plate. The middle part of the outer shell is provided with a partition that divides the outer shell into an equipment compartment and a working compartment. The scale plate is inserted into the opening on the front of the working compartment. The equipment compartment is equipped with a DC geared motor, a battery, and a push-button switch, which are connected by wires to form a closed circuit. A passive connector, a driving connector, and two round rods are installed on the partition. The driving connector is interference-fitted with the power output shaft of the DC gear reducer motor. A first roll with thermal paper is fitted on the passive connector, and an empty second roll is fitted on the driving connector. One end of the thermal paper passes over the two round rods in sequence and is then glued to the side of the second roll with adhesive. Two bearings with seats are installed on the back of the scale plate, and the head of the first scroll and the head of the second scroll are respectively engaged with the inner ring of the two bearings with seats. The scale plate has two parallel guide grooves. A detection rod that can move along the axial direction of the guide groove is installed in each guide groove. A compression spring that can extend and retract along the axial direction of the guide groove is sandwiched between the tail end of the detection rod and the guide groove. An indicator block is provided on the front of the detection rod and an indicator needle is provided on the back of the detection rod. The end of the indicator needle abuts against the thermal paper located between the two round rods.

2. The pressure vessel corner detection mechanism of claim 1, wherein: The working chamber is also equipped with a support assembly for supporting the thermal paper between the two round rods. The support assembly includes a support plate, two symmetrical connecting plates (first and second), and two compression springs (second). The first connecting plate is vertically fixed to the inner outer shell of the working chamber, and the second connecting plate is vertically fixed to the back of the support plate. The head of the first connecting plate is provided with a protruding slider, and the second connecting plate is provided with a sliding groove. The slider slides into the sliding groove, and the second compression spring is clamped between the back of the support plate and the outer shell.

3. The pressure vessel corner detection mechanism of claim 2, wherein: A sponge block is attached to each side of the back of the scale plate. The thickness of the sponge block is equal to the length of the indicator needle, and the distance between the two sponge blocks is less than the width of the support plate.

4. The pressure vessel corner detection mechanism of claim 1, wherein: The front center of the scale plate has a scale indicating the distance the indicator block moves, and the initial position of the indicator block is aligned with the 0 mark of the scale.

5. The pressure vessel corner detection mechanism according to claim 1, characterized in that: The front of the scale plate is equipped with a limit strip, and each end of the limit strip is provided with an outwardly protruding buckle block. A buckle groove is opened on the outer shell on both sides of the opening on the front of the working chamber, and the buckle block engages with the buckle groove.

6. The pressure vessel corner detection mechanism according to claim 5, characterized in that: The front of the detection rod is provided with a protruding front limiting block, and the indicator block is fixed to the front of the front limiting block. When the detection rod is in the initial state, the limiting strip abuts against the front limiting block.

7. The pressure vessel corner detection mechanism according to claim 1, characterized in that: The scale plate has a concave groove on each side, and the groove is parallel to the long axis of the scale plate. The outer shell on both sides of the opening on the front of the working chamber has a raised strip, which slides in conjunction with the groove.

8. The pressure vessel corner detection mechanism according to claim 1, characterized in that: The partition plate is provided with two bearing mounting rings, each bearing mounting ring is equipped with a ball bearing, the passive joint is interference-fitted in the inner ring of one of the ball bearings, and the drive joint is interference-fitted in the inner ring of the other ball bearing.

Images