Reducing magnetic type saddle opening line drawing tool and using method

Abstract

The invention relates to the technical field of different-diameter saddle opening line drawing, in particular to a different-diameter magnetic attraction type saddle opening line drawing tool and a using method.The different-diameter magnetic attraction type saddle opening line drawing tool comprises angle iron, the two side edges of the angle iron are each in a right triangle shape, and a limiting groove hole is formed in the inclined face of one side face of the angle iron; a line drawing pen for drawing a saddle opening on the outer wall of one pipe is installed in the limiting groove hole. Compared with a traditional manual measuring, positioning and drawing mode, the whole process has the advantages that operation steps are greatly simplified, needed time is shortened, angle iron with the fixed size is adopted as an auxiliary tool, the design of the line drawing pen capable of being finely adjusted is adopted, and it is guaranteed that the shape of the saddle opening drawn every time is consistent and meets the standard; and both professionals and beginners can easily master the method, so that the technical threshold is lowered, the material waste and the reworking possibility are reduced, and the production cost is indirectly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of marking lines on different-diameter saddle mouths, in particular to a different-diameter magnetic saddle mouth marking tool and a use method thereof. Background Art

[0002] Saddle mouth, also called saddle type connection, is usually used to connect two pipes or flanges of different diameters. Its shape can be obtained by drawing a large circle and a small circle and connecting the corresponding straight lines. Use a ruler and compass to ensure the verticality and parallelism of the straight lines. The curved part can be smoothly outlined using a curve board or free hand drawing. After checking the size, adjust it according to actual needs.

[0003] The following are the general drawing methods and techniques: (1) Drawing method: First, draw a large circle and a small circle to represent two pipes or flanges of different diameters. Then, draw a straight line from the bottom of the small circle upwards, with the endpoint of the straight line intersecting the large circle. Next, draw a straight line from the bottom of the large circle downwards, with the endpoint of the straight line also intersecting the small circle. Finally, connect these two straight lines into a smooth curve, which is the shape of the saddle mouth. (2) Techniques: 1. To ensure that the saddle mouth is drawn accurately, you can first measure the diameters of the two pipes or flanges, and then draw the corresponding large and small circles on paper according to the proportions. 2. When drawing straight lines, you can use a ruler and compass to ensure that the straight lines are vertical and parallel. 3. When drawing the saddle mouth curve, you can use a curve board or free hand drawing. When drawing by hand, you can first roughly draw the outline of the curve, and then outline it with a thin line to make it smoother. 4. After drawing the saddle mouth, check whether the size of its connection meets the actual needs. If necessary, you can make appropriate adjustments.

[0004] From the above content, it can be seen that the existing saddle mouth drawing method has many steps and is relatively cumbersome, has certain requirements on the operator, and is time-consuming and inconvenient in actual operation. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the fact that the existing saddle mouth drawing method in the above-mentioned or prior art has many steps and is relatively cumbersome, has certain requirements on the operator, is relatively time-consuming and inconvenient in actual operation, the present invention is proposed.

[0007] In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a different-diameter magnetic saddle mouth marking tool, comprising an angle iron, both side edges of the angle iron are in the shape of a right-angled triangle, and a limiting slot hole is arranged on the inclined surface of one of the side surfaces of the angle iron, and a marking pen for drawing the saddle mouth on the outer wall of one of the tubes is installed in the limiting slot hole.

[0008] As a preferred solution of the different-diameter magnetic saddle-mouth marking tool of the present invention, one end of the angle iron is an L-shaped surface, and the other end is a pointed end, and the L-shaped surface rides on the outer wall of the small tube, and the pointed end is against the outer wall of the large tube.

[0009] As a preferred solution of the different-diameter magnetic saddle-mouth marking tool of the present invention, the small tube and the large tube are placed vertically and their outer walls are close to each other. When the angle iron makes a circular motion around the outer wall of the small tube, its tip always fits the outer wall of the large tube.

[0010] As a preferred solution of the different-diameter magnetic saddle-mouth marking tool of the present invention, the marking pen includes a bracket tube installed in the limiting slot hole, and a pen body installed inside the bracket tube, and a spring is arranged between the bracket tube and the pen body.

[0011] As a preferred solution of the different-diameter magnetic saddle-mouth marking tool of the present invention, the pen body includes a marking pen and a rubber sleeve sleeved on the outside of the marking pen, the outer wall of the rubber sleeve is provided with a notch, and the spring is located between the notch and the inner wall groove of the bracket tube.

[0012] As a preferred solution of the different-diameter magnetic saddle mouth marking tool of the present invention, the limiting slot hole includes two forms: a limiting slot and a limiting hole. When it is a limiting slot, it is arranged in a long strip along the hypotenuse; when it is a limiting hole, there are multiple limiting holes, which are evenly spaced along the hypotenuse.

[0013] As a preferred solution of the different-diameter magnetic saddle mouth marking tool of the present invention, when the limiting slot hole is in the shape of the limiting slot, a self-locking part is provided on the bracket tube, and the self-locking part is used to lock the bracket tube at any position of the limiting slot.

[0014] As a preferred solution of the different-diameter magnetic saddle-mouth marking tool of the present invention, when the limiting slot is in the shape of the limiting hole, the inner wall of the limiting hole is provided with an internal thread, and the outer wall of the bracket tube is provided with an external thread, and the two are screwed together.

[0015] As a preferred solution of the different-diameter magnetic saddle-mouth marking tool of the present invention, a plurality of magnetic blocks are fixed on each end face of the angle iron, and the magnetic blocks are used to adsorb the angle iron on the outer walls of the large tube and the small tube.

[0016] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for using a different-diameter magnetic saddle mouth marking tool, comprising the different-diameter magnetic saddle mouth marking tool, and,

[0017] Place the end of the small tube against the outer wall of the large tube to keep the two in a vertical position;

[0018] Place the L-shaped surface of the angle iron on the outer wall of the small tube, and place its tip against the outer wall of the large tube;

[0019] Adjust the position of the marker pen in the limiting slot and make the tip of the marker pen contact the outer wall of the small tube;

[0020] Rotate the angle iron 360 degrees along the outer wall of the small tube, and keep its tip against the outer wall of the large tube. The marker will then draw a saddle shape on the outer wall of the small tube.

[0021] The small tube is cut along the saddle mouth line, and the small tube is connected to the large tube to complete the saddle mouth connection of the reducer.

[0022] The beneficial effects of the present invention are as follows: the different-diameter magnetic saddle-mouth marking tool of the present invention has an L-shaped surface on one side and a pointed tip on the other side. When in use, the L-shaped surface is placed on the outer wall of the small tube, and the pointed tip is close to the outer wall of the large tube to maintain stability. Next, a marking pen is installed in the limiting slot hole on the side of the tool, and its position is adjusted so that the pen tip contacts the outer surface of the small tube. Then, the tool is rotated 360 degrees along the outer wall of the small tube to ensure that the pointed tip always fits the outer wall of the large tube, so that the marking pen automatically draws a complete saddle-mouth shape. Finally, the small tube is cut along the drawn line and connected to the large tube in a saddle-mouth manner. Compared with the traditional manual measurement, positioning and drawing methods, the whole process greatly simplifies the operation steps and reduces the time required. The use of fixed-size angle irons as auxiliary tools and the fine-adjustable drawing pen design ensure that the shape of the saddle mouth drawn each time is consistent and meets the standards. Both professional technicians and beginners can easily master it, which lowers the technical threshold, reduces material waste and the possibility of rework, thereby indirectly reducing production costs. Furthermore, magnetic blocks are added to further strengthen the connection between the tool and the small tube and between the small tubes, thereby improving the stability of the tool and making it more convenient and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0024] Figure 1 Schematic diagram of the working process of the different diameter magnetic saddle mouth marking tool Figure 1 .

[0025] Figure 2 Schematic diagram of the working process of the different diameter magnetic saddle mouth marking tool Figure 2 .

[0026] Figure 3 This is an overall schematic diagram of a different-diameter magnetic saddle mouth marking tool.

[0027] Figure 4 Schematic diagram of the cross-sectional structure of a line drawing pen.

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the bracket tube and the self-locking part.

[0029] In the figure:

[0030] 100, angle iron; 101, limiting slot hole; 101a, limiting slot; 101b, limiting hole; 102, L-shaped surface; 103, tip;

[0031] 200, drawing pen; 201, support tube; 202, pen body; 202a, marking pen; 202b, rubber sleeve; 203, spring;

[0032] 300. Magnet. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0036] Example 1

[0037] Reference Figure 1-Figure 3, which is the first embodiment of the present invention, provides a different-diameter magnetic saddle mouth marking tool, including an angle iron 100, both sides of the angle iron 100 are in the shape of a right-angled triangle, and a limiting slot 101 is provided at the inclined surface of one of the side surfaces of the angle iron 100, and a marking pen 200 for drawing the saddle mouth on the outer wall of one of the tubes is installed in the limiting slot 101.

[0038] One end of the angle iron 100 is an L-shaped surface 102, and the other end is a tip 103, and the L-shaped surface 102 rides on the outer wall of the small tube, and the tip 103 is against the outer wall of the large tube. The small tube and the large tube are vertically placed with their outer walls close together, and when the angle iron 100 moves in a circle around the outer wall of the small tube, its tip 103 always closes to the outer wall of the large tube.

[0039] It should be noted that the two sides of the angle iron 100 are designed to be in the shape of a right triangle, with an L-shaped surface 102 at one end and a tip 103 at the other end. This unique shape design allows the L-shaped surface 102 to firmly straddle the outer wall of the small tube, ensuring that the angle iron 100 remains stable during the rotation and drawing process, and will not easily slide or shift, thereby improving the accuracy and consistency of the marking; and the tip 103 achieves point contact with the outer wall of the large tube. Due to the small contact area, the friction resistance is also reduced accordingly, making the angle iron 100 smoother when rotating, and the tip 103 is always close to the outer wall of the large tube, ensuring that the relative position between the tool and the large tube remains unchanged during the entire marking process, further ensuring the accuracy of the saddle mouth line. Such a design not only enhances the stability and accuracy of the tool during use, but also improves the convenience and adaptability of operation. Regardless of the specific size of the pipeline, high-quality saddle mouth drawing can be completed through simple adjustments.

[0040] In this embodiment, first, the end face of the small tube is pressed against the outer wall of the large tube to ensure that the two remain vertical. This step is the basis of the entire process and determines the accuracy of the final saddle shape.

[0041] Next, take the special tool of the present invention, the different-diameter magnetic saddle mouth marking tool. The tool is composed of an angle iron 100 with two sides of a right-angled triangle, one side of which is provided with an L-shaped surface 102 and the other side is a tip 103. The L-shaped surface 102 of the angle iron 100 is placed on the outer wall of the small tube so that it can be firmly straddled on the small tube. At the same time, ensure that the tip 103 of the angle iron 100 is closely attached to the outer wall of the large tube. This design ensures that the angle iron 100 can always maintain the correct relative position with the two pipes during the entire rotation process.

[0042] A limiting slot 101 is provided on a side inclined surface of the angle iron 100 for mounting a marker pen 200. According to actual needs, the position of the marker pen 200 in the limiting slot 101 is adjusted until the tip of the marker pen 200 just touches the outer surface of the small tube. This fine adjustment function enables each drawing to achieve high consistency and accuracy.

[0043] Next, the angle iron 100 is rotated 360 degrees along the outer wall of the small tube, while ensuring that the tip 103 of the angle iron 100 is always tightly attached to the outer wall of the large tube. As the angle iron 100 rotates, the marking pen 200 automatically draws a complete saddle mouth shape on the outer wall of the small tube. Since the angle iron 100 of fixed size is used as an auxiliary tool and the marking pen 200 can be finely adjusted, it can be ensured that the saddle mouth shape drawn each time is consistent and meets the standard.

[0044] Once the markings are completed, cut the tube along the saddle lines you drew. Use an appropriate cutting tool, such as a saw or plasma cutter, to cut the tube exactly along the markings.

[0045] Finally, the treated small pipe is connected to the large pipe in a saddle-mouth manner, thus completing the saddle-mouth connection between pipes of different diameters.

[0046] Effect description: (1) Easy operation: Compared with the traditional manual measurement, positioning and drawing methods, this solution can complete the entire process through simple assembly and rotation, which greatly reduces the time required. The user only needs a few simple steps to quickly complete the drawing of the saddle mouth, reducing labor intensity. (2) High precision: A fixed-size angle iron 100 is used as an auxiliary tool, and the drawing pen 200 can be finely adjusted to ensure that the shape of the saddle mouth drawn each time is consistent and meets the standard. This design reduces human errors and improves work quality. (3) Strong applicability: It is very easy to master for both professional technicians and beginners. Even operators without much experience can easily get started, which reduces the technical threshold of users. (4) Cost savings: By improving work efficiency and reducing the possibility of rework, production costs are indirectly reduced. In addition, since the design of the tool allows for reuse, the service life is further extended and the cost of long-term operation is reduced.

[0047] The marker pen 200 includes a support tube 201 installed in the limiting slot 101, and a pen body 202 installed inside the support tube 201, and a spring 203 is arranged between the support tube 201 and the pen body 202. Further, the pen body 202 includes a marker pen 202a and a rubber sleeve 202b sleeved on the outside of the marker pen 202a, and a notch is arranged on the outer wall of the rubber sleeve 202b, and the spring 203 is located between the notch and the inner wall groove of the support tube 201.

[0048] It should be noted that the structural design of the marker pen 200 is intended to provide flexibility and adaptability to draw horseshoe mouths (or saddle mouths) of different specifications. The marker pen 200 is mainly composed of three parts: a support tube 201, a pen body 202 and a spring 203. The following is a detailed description of each part:

[0049] The support tube 201 is a component designed to be installed in the side limit slot 101 of the line drawing tool. Its function is to allow the line drawing pen 200 to be fixed at any position in the limit slot 101, so that the position of the pen can be adjusted as needed to adapt to different pipe diameters and horseshoe shapes. Through this adjustable design, the range of horseshoe specifications that can be drawn is increased.

[0050] Pen body 202: The pen body 202 is composed of a marker pen 202a and a rubber sleeve 202b on the outside thereof. The marker pen 202a is the part actually used for marking. The rubber sleeve 202b is used to modify marker pens 202a of different specifications to meet the requirements of the pen body 202 and the spring 203.

[0051] Spring 203: A spring 203 is provided between the support tube 201 and the pen body 202. The purpose of the spring 203 is to control the expansion and contraction of the pen body 202 relative to the support tube 201, ensuring that no matter how the diameter of the tube changes, the pen tip can closely fit the tube wall for accurate drawing. In order to make better use of the spring 203, an annular notch is provided on the rubber sleeve 202b outside the marker 202a, and a groove is also provided on the inner wall of the support tube 201 accordingly. One end of the spring 203 abuts against the lower end face of the notch on the rubber sleeve 202b, and the other end abuts against the upper end face of the groove on the inner wall of the support tube 201. This design enables the spring 203 to automatically adjust the extension length of the pen body 202 according to the curvature of the tube wall when the line drawing pen 200 moves along the tube wall, ensuring that the pen tip is always in close contact with the tube wall, thereby achieving smooth and accurate line drawing.

[0052] In summary, this complex mechanism is designed to ensure that the marker pen 200 can work stably on pipes of different sizes and can draw clear and precise horseshoe mouth contours, while also being adaptable to a variety of different application scenarios.

[0053] Furthermore, a plurality of magnetic blocks 300 are fixed on each end surface of the angle iron 100, and the magnetic blocks 300 are used to adsorb the angle iron 100 on the outer wall of the large tube and the small tube.

[0054] It should be noted that by installing the magnetic block 300 on the angle iron 100, this design provides a flexible and efficient means to fix the required tools or devices on pipes of different diameters, whether large or small, to ensure good adsorption and stability, which is a very practical solution for tasks such as drawing horseshoe mouths.

[0055] Example 2

[0056] Reference Figure 1-Figure 4 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a limiting slot 101 including two forms of a limiting slot 101a and a limiting hole 101b. When it is a limiting hole 101b, a plurality of limiting holes are provided, which are evenly spaced along the hypotenuse. When the limiting slot 101 is in the shape of a limiting hole 101b, the inner wall of the limiting hole 101b is provided with an internal thread, and the outer wall of the bracket tube 201 is provided with an external thread, and the two are screwed together.

[0057] It should be noted that the limiting slot 101 includes two forms: a limiting slot 101a and a limiting hole 101b. When the limiting hole 101b is used, a plurality of limiting holes 101b are distributed at equal intervals along the hypotenuse, and the inner wall of each limiting hole 101b is provided with an internal thread, and the outer wall of the bracket tube 201 is provided with an external thread, and the two can be connected by a thread. After selecting a saddle mouth of corresponding specifications as needed, the bracket tube 201 of the marker pen 200 is screwed with the internal thread in the selected limiting hole 101b through its external thread, thereby locking the position of the marker pen 200 and ensuring that the tip 103 of the marker pen 200 is close to the outer wall of the small tube for accurate saddle mouth drawing. This design not only provides a variety of position options, but also ensures the stability and accuracy of the marker pen 200 during use through threaded connection.

[0058] The above design not only ensures the precise adjustment and fixation of the position of the marker pen 200 through the threaded connection between the limit hole 101b and the bracket tube 201, but also brings some additional advantages: (1) Flexibility: Since the limit holes 101b are evenly spaced along the hypotenuse, it means that different hole positions can be selected to install the marker pen 200 according to actual needs, so as to achieve line drawing at different angles or positions. This multi-hole design increases the flexibility of the tool. (2) Stability: The threaded connection is a very stable way to effectively prevent position deviation caused by accidental collision during the line drawing process. Once the bracket tube 201 is tightened into the limit hole 101b, the position of the marker pen 200 will hardly change unless it is manually unfastened, which ensures consistency and accuracy during work. (3) Adjustability: If you need to fine-tune the angle or height of the marker pen 200, you only need to slightly loosen the external thread and then reposition it to easily complete the adjustment. This design allows for quick response even in complex or delicate operations. (4) Wide range of applications: By replacing saddle mouths of different specifications (i.e., adapting to different types of small tube diameters), the device can be used on small tubes of various sizes. Therefore, this system can provide good support for both industrial production and personal DIY projects. (5) Easy operation: The entire process does not require complex tools or technical knowledge. Users only need to rotate the bracket tube 201 to the appropriate limit hole 101b according to their needs and fix it, and then they can start working. The simple and intuitive operation method lowers the threshold for use and improves work efficiency.

[0059] In summary, this design scheme of using the limiting hole 101b to cooperate with the bracket tube 201 not only enhances the functionality and practicality of the device, but also greatly improves the user experience. Through this design, the user can complete the drawing of the saddle mouth more conveniently and accurately, and can achieve excellent results both in professional environments and in personal projects.

[0060] A method for using a different-diameter magnetic saddle-mouth marking tool comprises the following steps: placing the end face of a small tube against the outer wall of a large tube to keep the two in a vertical state; placing the L-shaped surface 102 of an angle iron 100 on the outer wall of the small tube, and placing its tip 103 against the outer wall of the large tube; selecting a saddle mouth of corresponding specifications as required, and then screwing a support tube 201 of a marking pen 200 with an internal thread in a corresponding limiting hole 101b through an external thread to lock the position of the marking pen 200, and placing the tip 103 of the marking pen 200 against the outer wall of the small tube; rotating the angle iron 100 360 degrees along the outer wall of the small tube, and placing its tip 103 against the outer wall of the large tube at all times, and then the marking pen 200 will draw a saddle-mouth shape on the outer wall of the small tube; cutting the small tube along the saddle-mouth line, and connecting the small tube with the large tube to complete the saddle-mouth connection of the different-diameter tubes.

[0061] Example 3

[0062] Refer to the figure Figure 1-Figure 3 as well as Figure 5 , which is the third embodiment of the present invention. Different from the previous embodiment, this embodiment provides a limiting slot 101 including two forms of a limiting slot 101a and a limiting hole 101b. When it is a limiting slot 101a, it is arranged in a long strip along the hypotenuse; when the limiting slot 101 is in the shape of a limiting slot 101a, a self-locking piece is arranged on the bracket tube 201, and the self-locking piece is used to lock the bracket tube 201 at any position of the limiting slot 101a.

[0063] Specifically, the outer wall of the bracket tube 201 is provided with an external thread, and the self-locking part is composed of an upper knob and a lower knob, and the two knobs are screwed to the upper and lower ends of the outer wall of the bracket tube 201 through the external thread, and multiple hinged rods are provided between the upper knob and the lower knob. By rotating the upper knob or the lower knob, the distance between the two can be adjusted, thereby squeezing the hinged rod between them to protrude outward, and then abut against the inner wall of the limit groove 101a, thereby realizing the locking of the bracket tube 201 at any position in the limit groove 101a.

[0064] In the original design, the outer wall of the support tube 201 has been provided with an external thread so as to cooperate with the internal thread in the limiting hole 101b. In order to further improve the accuracy and range of the position adjustment of the drawing pen 200, this design introduces a self-locking member so that the support tube 201 can be combined with the limiting groove 101a. In this way, not only can the limiting hole 101b be used for rough position fixation, but the position of the drawing pen 200 can also be adjusted more finely through the self-locking member. This improvement not only expands the adjustable range of the drawing pen 200, but also enhances its positioning accuracy. The effects of adding the self-locking member also include: (1) Enhanced fine-tuning capability: The self-locking member allows the user to make more subtle position adjustments between two adjacent limiting holes 101b, thereby meeting more stringent drawing requirements. (2) Improved adaptability: Combining the design of the limiting hole 101b with the self-locking member, the device can better adapt to small tubes of different sizes and various complex drawing tasks, thereby improving the overall flexibility. (3) Enhanced stability: Even after minor adjustments, the self-locking parts ensure that the line marker 200 remains stable and prevents deviations caused by vibrations or slight touches, thereby ensuring continuity and accuracy of work. (4) Simplified operation: Despite the addition of new components, the entire system remains easy to use. Users can tighten or loosen the self-locking parts with a simple rotation motion to quickly achieve the desired position adjustment without the need for additional professional skills. Therefore, by adding the innovative element of the self-locking parts, the design not only improves the fineness of the adjustment of the line marker 200, but also further optimizes the overall performance of the tool, making it more suitable for application scenarios that require a high degree of accuracy.

[0065] The design of the limit groove 101a and the self-locking member has the following effects: (1) Firm locking: The hinged rod protrudes outward under the action of external force and tightly abuts against the inner wall of the limit groove 101a, forming a firm locking effect, preventing the bracket tube 201 from being displaced during use, and ensuring the stability and reliability of the tool. (2) Easy operation: The bracket tube 201 can be locked and unlocked by simply turning the knob. The operation is simple and quick, without the need for complex tools or additional operating steps, which improves work efficiency. (3) Strong adaptability: This design enables the bracket tube 201 to be locked at any position in the limit groove 101a, which is suitable for pipes of different specifications and sizes, enhancing the versatility and adaptability of the tool. (4) Durability: Due to the use of threaded connection and mechanical locking mechanism, the entire structure is sturdy and durable, and can maintain good performance during long-term use, reducing the frequency of maintenance and replacement. In summary, this self-locking design not only provides precise position adjustment and firm locking function, but also simplifies the operation process, enhances the adaptability and durability of the tool, and is an important guarantee for achieving efficient and accurate saddle mouth drawing.

[0066] The invention discloses a method for using a different-diameter magnetic saddle-mouth marking tool. The method comprises the following steps: placing the end face of a small tube against the outer wall of a large tube so that the two tubes are kept in a vertical state; placing an L-shaped surface 102 of an angle iron 100 on the outer wall of the small tube, and pressing its tip 103 against the outer wall of the large tube; rotating an upper knob to expand the distance between the upper knob and the lower knob so that a hinge rod contracts, and then moving the position of a marking pen 200 in a limiting groove 101a to adjust the specification of the saddle mouth; and tightening the upper knob again after the position is determined to complete locking of the position of the marking pen 200 in the limiting groove 101a, and pressing the tip 103 of the marking pen 200 against the outer wall of the small tube; rotating the angle iron 100 360 degrees along the outer wall of the small tube, and making its tip 103 always press against the outer wall of the large tube, so that the marking pen 200 will draw a saddle-mouth shape on the outer wall of the small tube; cutting the small tube along the saddle-mouth line, and connecting the small tube with the large tube to complete the saddle-mouth connection of the different-diameter tubes.

[0067] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0068] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0069] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A different-diameter magnetic saddle mouth marking tool, characterized by: The invention comprises an angle iron (100), both sides of which are in the shape of a right triangle, and a limiting slot hole (101) is arranged at the inclined surface of one of the side surfaces of the angle iron (100), and a drawing pen (200) for drawing a saddle mouth on the outer wall of one of the tubes is installed in the limiting slot hole (101).

2. The different-diameter magnetic saddle mouth marking tool according to claim 1, characterized in that: One end of the angle iron (100) is an L-shaped surface (102), and the other end is a tip (103), and the L-shaped surface (102) rides on the outer wall of the small tube, and the tip (103) abuts against the outer wall of the large tube.

3. The different-diameter magnetic saddle mouth marking tool according to claim 2, characterized in that: The small tube and the large tube are placed vertically and their outer walls are close to each other. When the angle iron (100) moves in a circle around the outer wall of the small tube, its tip (103) always closes to the outer wall of the large tube.

4. The different-diameter magnetic saddle mouth marking tool according to claim 1 or 3, characterized in that: The marker pen (200) comprises a support tube (201) installed in the limiting slot hole (101), and a pen body (202) installed inside the support tube (201), and a spring (203) is arranged between the support tube (201) and the pen body (202).

5. The different-diameter magnetic saddle mouth marking tool according to claim 4, characterized in that: The pen body (202) comprises a marking pen (202a) and a rubber sleeve (202b) sleeved on the outside of the marking pen (202a); the outer wall of the rubber sleeve (202b) is provided with a notch, and the spring (203) is located between the notch and the inner wall groove of the bracket tube (201).

6. The different-diameter magnetic saddle-mouth marking tool according to claim 4, characterized in that: The limiting slot (101) includes two forms: a limiting slot (101a) and a limiting hole (101b). When it is the limiting slot (101a), it is arranged in a long strip along the hypotenuse; when it is the limiting hole (101b), a plurality of limiting holes (101b) are arranged and are distributed at equal intervals along the hypotenuse.

7. The different-diameter magnetic saddle-mouth marking tool according to claim 6, characterized in that: When the limiting slot hole (101) is in the shape of the limiting slot (101a), a self-locking member (201a) is provided on the bracket tube (201), and the self-locking member (201a) is used to lock the bracket tube (201) at any position of the limiting slot (101a).

8. The different-diameter magnetic saddle-mouth marking tool according to claim 6, characterized in that: When the limiting slot hole (101) is in the shape of the limiting hole (101b), the inner wall of the limiting hole (101b) is provided with an internal thread, and the outer wall of the support tube (201) is provided with an external thread, and the two are threadedly connected.

9. The different-diameter magnetic saddle mouth marking tool according to claim 1, characterized in that: A plurality of magnetic blocks (300) are fixed on each end surface of the angle iron (100), and the magnetic blocks (300) are used to adsorb the angle iron (100) onto the outer walls of the large tube and the small tube.

10. A method for using a different-diameter magnetic saddle mouth marking tool, characterized in that: The invention comprises the different-diameter magnetic saddle mouth marking tool as described in any one of claims 1 to 9, and Place the end of the small tube against the outer wall of the large tube to keep the two in a vertical position; Place the L-shaped surface of the angle iron on the outer wall of the small tube, and place its tip against the outer wall of the large tube; Adjust the position of the marker pen in the limiting slot and make the tip of the marker pen contact the outer wall of the small tube; Rotate the angle iron 360 degrees along the outer wall of the small tube, and keep its tip against the outer wall of the large tube. The marker will then draw a saddle shape on the outer wall of the small tube. The small tube is cut along the saddle mouth line, and the small tube is connected to the large tube to complete the saddle mouth connection of the reducer.

Images