Scribing gauge for drilling in spiral pipe and spiral pipe

Abstract

The utility model relates to the technical field of spiral pipe machining, and discloses a scribing gauge for drilling in a spiral pipe, which comprises a core rod, a guide disc and a scribing disc. An operating handle is arranged at one end of the core rod; the guide disc is arranged at the other end of the core rod, and a pair of guide pins is arranged in the circumferential direction of the guide disc; the scribing disc is movably arranged on the core rod and located between the operating handle and the guide disc. According to the drilling device, the accuracy of the drilling position of the threaded pipe can be ensured, the situation that the spiral pipe is scrapped due to the fact that the drilling position is wrong is avoided, and the cost is saved. The utility model further discloses the spiral pipe.

Description

Technical Field

[0001] This application relates to the field of spiral tube processing technology, for example to a scribing gauge for making holes inside a spiral tube and a spiral tube. Background Technology

[0002] Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made by rolling low-carbon structural steel or low-alloy structural steel strip into a pipe blank at a certain spiral angle, and then welding the pipe seam together. It can produce large-diameter steel pipes from narrower steel strips.

[0003] There are two vent holes inside the indentation of the middle section of the spiral tube. Since the vent holes are far from the end of the spiral tube, the situation at the vent holes cannot be observed from the end of the spiral tube. The ordinary scribing method on the outside of the spiral tube cannot guarantee that the two vent holes are scribed within the indentation of the spiral tube. When the two vent holes are drilled by visual scribing on the outside of the spiral tube, the machining error of the two vent holes is caused by the external visual scribing error. The vent holes are often drilled on the positive line of the spiral tube, causing the spiral tube to be scrapped.

[0004] Therefore, it is evident that ensuring the accuracy of the drilling position for threaded pipes and saving costs are technical problems that urgently need to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a scribing gauge and a spiral tube for drilling holes inside spiral tubes, which can ensure the accuracy of the drilling position of the threaded tube, avoid the scrapping of the spiral tube due to incorrect drilling position, and save costs.

[0008] In some embodiments, a scribing gauge for drilling holes in a spiral tube includes: a mandrel, a guide plate, and a scribing disc. One end of the mandrel is provided with an operating handle, wherein the mandrel and the operating handle are rotatably connected, and scale marks are evenly arranged along the length of the mandrel. The guide plate is located at the other end of the mandrel, and a pair of guide pins are arranged circumferentially on the guide plate, wherein the outer diameter of the guide plate and the inner diameter of the spiral tube are in clearance fit. The scribing disc is movably mounted on the mandrel, and is located between the operating handle and the guide plate. A fixed long rod is movably mounted on the scribing disc to restrict the movement of the scribing disc, and scale lines are provided on the end face of the scribing disc. The portion of the scribing disc facing the guide plate can be adapted to be inserted into the spiral tube.

[0009] Optionally, the scribing disk is a boss-like structure composed of two stacked cylinders.

[0010] Optionally, the smaller diameter portion of the marking disc can be fitted into the spiral tube.

[0011] Optionally, the end face of the larger diameter portion of the scribing disk is evenly provided with multiple graduated lines.

[0012] Optionally, a pair of guide pins are symmetrically arranged in the circumferential direction of the guide plate.

[0013] Optionally, both guide pins are movably connected to the guide plate.

[0014] Optionally, a positioning key is provided between the guide plate and the core rod.

[0015] Optionally, the core rod is provided with locking nuts, and the locking nuts are provided in pairs, with the guide plate located between the pairs of locking nuts. The locking nuts are used to lock the guide plate to one end of the core rod.

[0016] Optionally, the core rod is a connecting shaft that connects the fixed guide plate and the scribing plate, wherein the connecting shaft is a telescopic structure.

[0017] In some embodiments, a spiral tube includes a scribing gauge for making holes in the spiral tube as described in any of the preceding embodiments.

[0018] The present disclosure provides a scribing gauge and a spiral tube for making internal holes in spiral tubes, which can achieve the following technical effects:

[0019] When drilling is required on a threaded tube, the guide plate is placed inside the hole of the spiral tube, and the guide pin moves along the indentation inside the spiral tube for positioning and guidance. When the scribing plate is inserted into the spiral tube, the position to be drilled is determined by scribing the scale and the scale lines on the scribing plate. This device can ensure the accuracy of the drilling position on the threaded tube, avoid the scrapping of the spiral tube due to incorrect drilling position, and save costs.

[0020] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0022] Figure 1 This is a schematic diagram of the scribing gauge for making holes inside a spiral tube provided in an embodiment of this disclosure;

[0023] Figure 2 This is a schematic diagram of the structure of the sleeve provided in the embodiments of this disclosure;

[0024] Figure 3 This is a schematic diagram of the structure of the guide pin provided in an embodiment of this disclosure;

[0025] Figure 4 This is a schematic diagram of the positioning key provided in an embodiment of this disclosure;

[0026] Figure 5 This is a schematic diagram of the structure of the locking nut provided in the embodiments of this disclosure;

[0027] Figure 6 This is a schematic diagram of the structure of the fixed short rod provided in an embodiment of this disclosure.

[0028] Figure label:

[0029] 100. Core rod; 101. Operating handle; 102. Scale mark; 103. Positioning key; 104. Locking nut; 105. Sleeve; 106. Locking screw; 200. Guide plate; 201. Guide pin; 202. Hex nut; 203. Fixing short rod; 300. Marking plate; 301. Fixing long rod; 302. Scale line; 303. Fixing bushing. Detailed Implementation

[0030] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0031] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0032] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0033] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0034] Unless otherwise stated, the term "multiple" means two or more.

[0035] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0036] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0038] Combination Figure 1-3As shown, this embodiment of the present disclosure provides a scribing gauge for making holes inside a spiral tube, including: a core rod 100, a guide plate 200, and a scribing plate 300. The core rod 100 has an operating handle 101 at one end, which is rotatably connected to the operating handle 101. Scale marks 102 are evenly distributed along the length of the core rod 100. A guide plate 200 is located at the other end of the core rod 100, and a pair of guide pins 201 are provided on the circumference of the guide plate 200. The outer diameter of the guide plate 200 is clearance-fitted with the inner diameter of the spiral tube. A scribing plate 300 is movably mounted on the core rod 100, located between the operating handle 101 and the guide plate 200. A fixed long rod 301 is movably mounted on the scribing plate 300 to restrict its movement. Scale lines 302 are provided on the end face of the scribing plate 300. The portion of the scribing plate 300 facing the guide plate 200 can be inserted into the spiral tube.

[0039] Using the scribing gauge for drilling holes in spiral tubes provided in this embodiment, when drilling is required on the threaded tube, the guide plate 200 is placed inside the hole of the spiral tube, and the guide pin 201 is moved along the indentation inside the spiral tube for positioning and guidance. When part of the scribing plate 300 is inserted into the spiral tube, the position to be drilled can be determined by scribing the scale mark 102 and the scale line 302 on the scribing plate 300. Thus, this device can ensure the accuracy of the drilling position of the threaded tube, avoid the scrapping of the spiral tube due to incorrect drilling position, and save costs.

[0040] Optionally, the outer surface of the operating handle 101 is curved. This makes it easier to operate and enhances the user experience.

[0041] Optionally, a sleeve 105 is provided at the end of the operating handle 101 facing the core rod 100, and one end of the core rod 100 is rotatably disposed within the sleeve 105. This simplifies the connection method, facilitates operation, and ensures smooth rotation of the core rod 100.

[0042] Understandably, sleeve 105 can be a bearing. Bearings are existing technology, and their specific structure will not be described in detail here.

[0043] Optionally, a locking screw 106 is provided on the sleeve 105, and the locking screw 106 is threadedly connected to the sleeve 105. The locking screw 106 is used to limit the rotation of the core rod 100. In this way, when the guide pin 201 moves to the target drilling position, the rotation of the core rod 100 is limited by the locking screw 106, which makes the core rod 100 more stable. This facilitates subsequent measurement and avoids the situation where continuous rotation affects the accuracy of the drilling position.

[0044] Optionally, the scribing disk 300 is a boss-like structure composed of two stacked cylindrical shapes. This optimized structure limits the continuous movement of the guide disk 200 into the spiral tube, preventing the scribing disk 300 from fully entering the spiral tube, thus facilitating stable and accurate measurement of the drilling position.

[0045] Optionally, a fixed bushing 303 is provided on one side of the larger diameter portion of the scribing disk 300, and a fixed long rod 301 is mounted on the fixed bushing 303 and threadedly connected to the fixed bushing 303. In this way, the scribing disk 300 is locked onto the core rod 100, ensuring that the scribing disk 300 only rotates with the core rod 100 and will not move, thus ensuring the accuracy of the scribing measurement.

[0046] Optionally, the smaller diameter portion of the scribing disc 300 can be inserted into the spiral tube. In this way, after the smaller diameter portion of the scribing disc 300 enters the spiral tube, the larger diameter portion is stuck on the outside of the spiral tube, thereby preventing the core rod 100 from continuously moving into the spiral tube. This allows the guide pin 201 to be accurately delivered into the preset position for subsequent precise drilling operations.

[0047] Optionally, the end face of the larger diameter portion of the scribing disc 300 is evenly provided with multiple scale lines 302. In this way, the scale lines 302 serve as guide lines for the operation position of this scribing measurement planning line, and together with the scale marks 102 on the core rod 100, the radial and axial position dimensions of the required hole position can be obtained, ensuring the accuracy of the drilling position of the threaded pipe and avoiding the scrapping of the threaded pipe due to incorrect drilling position.

[0048] Optionally, among the multiple scale lines 302, there is always one that corresponds to the guide pin 201. In this way, when the small-diameter end of the scribing disk 300, which is in clearance fit with the inner diameter of the spiral tube, is fully inserted into the spiral tube, the spiral tube is aligned using a spirit level according to the position of the scale line 302 on the end face of the scribing disk 300, and scribing is performed using a spirit level. A line is etched axially on the outer wall of the spiral tube according to the scale line 302 on the end face of the scribing disk 300, and then a line is etched on the outer wall of the spiral tube according to the distance between the vent hole and the end face of the spiral tube, thus obtaining the radial and axial position dimensions of the two holes.

[0049] Optionally, each scale line 302 has a width of 0.2 mm and a depth of 0.4 mm. This ensures that the width and depth of each scale line 302 are within a reasonable range, reducing the influence of the scale line 302 on the determination of the opening position. This makes the axial marking of the scale line 302 on the outer wall of the spiral tube more accurate, ensuring the accuracy of the radial position of the opening.

[0050] Optionally, the scale line 302 may be coated with a base color, which may be white paint. This makes it easier for the user to observe.

[0051] Optionally, a pair of guide pins 201 are symmetrically arranged in the circumferential direction of the guide disk 200. In this way, the determined opening position is also symmetrical, and after the guide disk 200 enters the spiral tube, the pair of guide pins 201 can move along the recessed groove inside the spiral tube and stop after moving to the opening position, so that the determined opening position is always located on the groove, ensuring the accuracy of the opening position.

[0052] Optionally, both guide pins 201 are movably connected to the guide plate 200. In this way, the length of the guide pins 201 protruding from the guide plate 200 can be adjusted according to the arrangement and concavity of the grooves inside the spiral tube, so that they are always fitted in the grooves and can always move stably and smoothly along the grooves.

[0053] Optionally, the guide pin 201 is threadedly connected to the guide disk 200. In this way, by rotating the guide pin 201, the length of the guide pin 201 protruding from the guide disk 200 can be adjusted, making the operation more convenient, and the adjusted guide pin 201 is also more stable and will not change position.

[0054] Optionally, the guide pin 201 is fixed to the guide plate 200 by a hexagonal nut 202. This not only fixes the guide pin 201, but also facilitates its adjustment and disassembly.

[0055] like Figure 4-6 As shown, optionally, a positioning key 103 is provided between the guide plate 200 and the core rod 100. In this way, the positioning key 103 can be used to position the guide plate 200 to ensure installation accuracy, so as to accurately measure the opening position later, and also to ensure that the guide plate 200 can rotate stably and smoothly with the core rod 100.

[0056] Optionally, a fixed short rod 203 is movably provided on the guide disc 200. When the fixed short rod 203 is connected to the core rod 100, the fixed short rod 203 is used to limit the rotation of the guide disc 200 on the core rod 100. In this way, by using the fixed short rod 203 to limit the rotation of the guide disc 200 on the core rod 100, the guide disc 200 can stably follow the rotation of the core rod 100, so that the guide pin 201 on it can move smoothly along the groove.

[0057] Optionally, the core rod 100 is provided with locking nuts 104, and the locking nuts 104 are arranged in pairs. The guide disc 200 is located between the pairs of locking nuts 104. The locking nuts 104 are used to lock the guide disc 200 to one end of the core rod 100. In this way, by using the locking nuts 104 to lock the guide disc 200 to one end of the core rod 100, it is more securely installed on the core rod 100, and axial movement of the guide disc 200 can be prevented.

[0058] Optionally, the core rod 100 serves as a connecting shaft between the fixed guide plate 200 and the scribing plate 300, wherein the connecting shaft is telescopic. This makes the structure of the core rod 100 more flexible and suitable for scribing and measuring the drilling positions of threaded pipes of different lengths.

[0059] This disclosure provides a spiral tube, including a scribing gauge for making holes in the spiral tube as described in any of the preceding embodiments.

[0060] Using the spiral tube provided in this embodiment, when drilling is required, the guide plate 200 is placed inside the hole of the spiral tube, and the guide pin 201 is moved along the indentation inside the spiral tube for positioning and guidance. When part of the scribing plate 300 is inserted into the spiral tube, the position to be drilled can be determined by scribing the scale mark 102 and the scale line 302 on the scribing plate 300. Thus, this device can ensure the accuracy of the drilling position of the spiral tube, avoid the scrapping of the spiral tube due to incorrect drilling position, and save costs.

[0061] It is worth noting that the threads of the spiral tube are located inside it, and the threads inside the spiral tube include recessed male lines and raised male lines located between two adjacent male lines, wherein the number of male lines is even.

[0062] Optionally, the portion of the guide pin 201 protruding from the guide disc 200 corresponds to the indentation and can be adapted to be positioned within the indentation. When the guide disc 200 moves into the threaded tube, the guide pin 201 always moves along the indentation inside the spiral tube. This ensures that the drilling position is always within the indentation, effectively preventing the vent hole from being drilled on the vent line of the spiral tube, thus avoiding the scrapping of the spiral tube.

[0063] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A scribing gauge for making internal holes in spiral tubes, characterized in that, include: The core rod (100) has an operating handle (101) at one end. The core rod (100) and the operating handle (101) are rotatably connected, and scale marks (102) are evenly arranged along the length of the core rod (100). A guide plate (200) is provided at the other end of the core rod (100), and a pair of guide pins (201) are provided in the circumferential direction of the guide plate (200). The outer diameter of the guide plate (200) and the inner diameter of the spiral tube are in clearance fit. A scribing disc (300) is movably mounted on a core rod (100) and is located between an operating handle (101) and a guide disc (200). A fixed long rod (301) is movably mounted on the scribing disc (300) to restrict the movement of the scribing disc (300). A scale line (302) is provided on the end face of the scribing disc (300). The portion of the scribing disc (300) facing the guide disc (200) can be adapted to be inserted into a spiral tube.

2. The scribing gauge for drilling holes inside spiral tubes according to claim 1, characterized in that, The marking disk (300) is a boss-like structure composed of two stacked cylinders.

3. The scribing gauge for drilling holes inside spiral tubes according to claim 2, characterized in that, The smaller diameter portion of the marking disc (300) can be fitted into the spiral tube.

4. The scribing gauge for drilling holes inside spiral tubes according to claim 2, characterized in that, The end face of the larger diameter part of the scribing disk (300) is evenly provided with multiple graduated lines (302).

5. The scribing gauge for drilling holes inside spiral tubes according to claim 1, characterized in that, A pair of guide pins (201) are symmetrically arranged on the circumference of the guide plate (200).

6. The scribing gauge for drilling holes inside spiral tubes according to claim 5, characterized in that, A pair of guide pins (201) are movably connected to the guide plate (200).

7. The scribing gauge for drilling holes in spiral tubes according to any one of claims 1 to 6, characterized in that, A positioning key (103) is provided between the guide plate (200) and the core rod (100).

8. The scribing gauge for drilling holes in spiral tubes according to any one of claims 1 to 6, characterized in that, The core rod (100) is provided with locking nuts (104), and the locking nuts (104) are provided in pairs. The guide plate (200) is located between the pairs of locking nuts (104). The locking nuts (104) are used to lock the guide plate (200) to one end of the core rod (100).

9. The scribing gauge for drilling holes in spiral tubes according to any one of claims 1 to 6, characterized in that, The core rod (100) is a connecting shaft that connects the fixed guide plate (200) and the scribing plate (300), wherein the connecting shaft is a telescopic structure.

10. A spiral tube, characterized in that, Including the scribing gauge for making holes inside spiral tubes as described in any one of claims 1 to 9.

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