Inner hole positioning device

Abstract

The utility model relates to the technical field of positioning devices, in particular to an inner hole positioning device which is provided with a supporting positioning pipe, an expansion positioning opening is formed in the supporting positioning pipe, a positioning elastic piece is arranged on the outer side of the expansion positioning opening, an inner supporting elastic piece is arranged on the inner side of the expansion positioning opening, and a movable telescopic rod is arranged in the supporting positioning pipe. Expansion or contraction of the inner supporting elastic piece and the positioning elastic piece is achieved by arranging the movable telescopic rod, so that the inner hole positioning device can be tightly attached to the inner wall of the flange and the inner wall of the connecting pipe, and it is guaranteed that the relative position of the flange and the connecting pipe is accurate and errorless in the butt joint process; operators can complete butt joint positioning only by controlling the axial movement of the movable telescopic rod, the complexity of operation and the requirement for operator skills are greatly reduced, operation can be completed by one person, and the working efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning devices, in particular to an inner hole positioning device. Background Art

[0002] In the pressure vessel manufacturing industry, the precise docking of flanges and nozzles is a key step to ensure the structural integrity and sealing performance of equipment. The inner diameters of the flange and the nozzle are the same, and the flange needs to be welded to the nozzle. The currently widely used docking method often relies on the close cooperation of two operators: one holds the flange and tries to accurately align it with the nozzle by visual judgment, while the other is responsible for spot welding and positioning after the initial alignment. Although this traditional method meets the production requirements to a certain extent, its limitations are becoming increasingly obvious.

[0003] First of all, the accuracy of visual docking is affected by various factors, such as light conditions, visual fatigue of operators and experience differences, etc., resulting in inevitable relative errors during the docking process, becoming a potential safety hazard and affecting the long-term stable operation of the equipment; secondly, this operation method requires the cooperation of two people at the same time, which not only increases the labor cost, but also limits the improvement of production efficiency. Summary of the Invention

[0004] To solve the above problems, the present application provides an inner hole positioning device, which is provided with a support positioning tube, an expansion positioning opening is arranged on the support positioning tube, a positioning elastic sheet is arranged outside the expansion positioning opening, an inner support elastic sheet is arranged inside the expansion positioning opening, a moving telescopic rod is arranged inside the support positioning tube, and an inner expansion sleeve is arranged on the moving telescopic rod.

[0005] In one embodiment, a plurality of expansion positioning openings are evenly distributed on the support positioning tube.

[0006] In one embodiment, a positioning limit opening is arranged on the support positioning tube, the positioning limit opening is arranged in one-to-one correspondence with the expansion positioning opening, a positioning limit plate is arranged at the front end of the positioning elastic sheet, and the positioning limit plate passes through the positioning limit opening and is placed inside the support positioning tube.

[0007] In one embodiment, the moving telescopic rod is threadedly connected to the support positioning tube, and the tail end of the inner support elastic sheet is fixedly installed inside the support positioning tube.

[0008] In one embodiment, a guiding head is arranged at the front end of the support positioning tube.

[0009] In one embodiment, a handle is arranged on the moving telescopic rod.

[0010] The beneficial effects of the utility model are as follows:

[0011] An inner hole positioning device of the present application is provided with a support positioning tube. An expansion positioning opening is arranged on the support positioning tube. A positioning elastic piece is arranged outside the expansion positioning opening, and an inner support elastic piece is arranged inside the expansion positioning opening. A moving telescopic rod is arranged inside the support positioning tube, and an inner expansion sleeve is arranged on the moving telescopic rod. The operator pulls the moving telescopic rod along the axial direction of the support positioning tube, so that the inner support elastic piece is expanded outward under the pressure of the inner expansion sleeve, providing support for the expansion of the positioning elastic piece; the positioning elastic piece is closely attached to the inner walls of the flange and the connecting pipe, and fixes the flange and the connecting pipe in a relative position through its elastic force to achieve precise positioning; the present application realizes the expansion or contraction of the inner support elastic piece and the positioning elastic piece by setting the moving telescopic rod, so that the inner hole positioning device can closely fit the inner walls of the flange and the connecting pipe, ensuring the relative position between the two is accurate and error-free during the docking process. The operator only needs to control the axial movement of the moving telescopic rod to complete the docking positioning, greatly reducing the complexity of the operation and the requirements for the operator's skills. One person can complete the operation, significantly improving the work efficiency. Brief Description of the Drawings

[0012] Figure 1 It is a cross-sectional view of the present utility model;

[0013] Figure 2 It is a schematic structural diagram after removing the positioning elastic piece;

[0014] Figure 3 It is a usage state diagram of the present utility model;

[0015] Figure 4 It is a left view of the present utility model;

[0016] Explanation of symbols in the figure:

[0017] 1. Support positioning tube; 2. Expansion positioning opening;

[0018] 3. Positioning elastic piece; 31. Positioning limit plate;

[0019] 4. Inner support elastic piece; 5. Moving telescopic rod; 6. Inner expansion sleeve; 7. Positioning limit opening; 8. Guide head; 9. Handle; 10. Flange; 11. Connecting pipe. Detailed Description of the Preferred Embodiments

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] It should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0022] As Figures 1-3 shown, an inner hole positioning device is provided with a support positioning tube 1. An expansion positioning opening 2 is provided on the support positioning tube 1. A positioning elastic piece 3 is arranged outside the expansion positioning opening 2. An inner support elastic piece 4 is arranged inside the expansion positioning opening 2. A moving telescopic rod 5 is arranged inside the support positioning tube 1. An inner expansion sleeve 6 is arranged on the moving telescopic rod 5.

[0023] Specifically, the moving telescopic rod 5 can reciprocate along the axial direction of the support positioning tube 1, thereby driving the inner expansion sleeve 6 to reciprocate. In the initial state, the moving telescopic rod 5 is in a contracted state, that is, the inner expansion sleeve 6 is located at the front end of the support positioning tube 1. At this time, the inner support elastic piece 4 is in a contracted state. When in use, the inner hole positioning device is inserted into the inner holes of the flange 10 and the connecting pipe 11 to be positioned. The operator pulls the moving telescopic rod 5 along the axial direction of the support positioning tube 1, thereby driving the inner expansion sleeve 6 to move synchronously towards the tail of the support positioning tube 1. As a result, the inner support elastic piece 4 is expanded outward by the pressure of the inner expansion sleeve 6. As the pressure increases, the inner support elastic piece 4 passes through the expansion positioning opening 2 and contacts the positioning elastic piece 3, and provides support for the expansion of the positioning elastic piece 3. Subsequently, the positioning elastic piece 3 closely adheres to the inner walls of the flange 10 and the connecting pipe 11, and fixes the flange 10 and the connecting pipe 11 in relative positions through its elastic force, achieving precise positioning. After the flange 10 and the connecting pipe 11 are precisely positioned, spot welding operations can be carried out. After completion of the fixation, the operator pushes the moving telescopic rod 5 forward to retract the inner support elastic piece 4 and the positioning elastic piece 3, thereby conveniently removing the inner hole positioning device from the assembled flange 10 and connecting pipe 11 that have been fixed. This application realizes the expansion or contraction of the inner support elastic piece 4 and the positioning elastic piece 3 by setting the moving telescopic rod 5, enabling the inner hole positioning device to closely adhere to the inner walls of the flange 10 and the connecting pipe 11, ensuring the relative positions of the two are precisely correct during the docking process. The operator only needs to control the axial movement of the moving telescopic rod 5 to complete the docking positioning, greatly reducing the complexity of the operation and the requirements for the operator's skills. One person can complete the operation, significantly improving the work efficiency.

[0024] As Figure 1 、 2 shown, a plurality of expansion positioning openings 2 are evenly distributed on the support positioning tube 1.

[0025] Specifically, multiple expansion positioning ports 2 can provide a wider contact area, making the inner hole positioning device more stable during the docking process and less likely to shift or wobble. Different flanges and nozzles have different sizes, and multiple expansion positioning ports 2 can better adapt to different sizes of flanges 10 and nozzles 11, ensuring the accuracy of docking. As Figure 4 shown, four expansion positioning ports 2 are provided.

[0026] As Figure 1 、 2 shown, positioning limit ports 7 are provided on the support positioning tube 1, and the positioning limit ports 7 are arranged in one-to-one correspondence with the expansion positioning ports 2. A positioning limit plate 31 is provided at the front end of the positioning elastic piece 3, and the positioning limit plate 31 passes through the positioning limit port 7 and is placed inside the support positioning tube 1.

[0027] Specifically, the one-to-one correspondence between the positioning limit ports 7 and the expansion positioning ports 2 ensures that the positioning elastic piece 3 can expand in a predetermined direction and range during expansion, thus achieving precise positioning of the docking components, avoiding offset and wobbling during the positioning process, and improving the accuracy and stability of docking. The positioning limit plate 31 passes through the positioning limit port 7 and is placed inside the support positioning tube 1, setting a physical limit for the expansion of the positioning elastic piece 3 to prevent the positioning elastic piece 3 from expanding excessively when subjected to excessive external force, thereby protecting the positioning elastic piece 3 and the entire positioning device from damage. Through the interaction of the positioning limit port 7 and the positioning limit plate 31, the inner hole positioning device can maintain the stability of its shape and position when subjected to external force, improving the durability and reliability of the entire device.

[0028] As Figure 1 、 2 shown, the movable telescopic rod 5 is threadedly connected to the support positioning tube 1, and the tail end of the inner support elastic piece 4 is fixedly installed inside the support positioning tube 1.

[0029] Specifically, the threaded connection enables the operator to easily adjust the position of the movable telescopic rod 5 inside the support positioning tube 1 as needed; in addition, the threaded connection has good self-locking properties and can maintain the firmness of the connection when subjected to external force, which means that during the positioning or support process, the movable telescopic rod 5 will not accidentally loosen or fall off, thus ensuring the stability of the entire device.

[0030] As Figure 1 、 4 shown, a guide head 8 is provided at the front end of the support positioning tube 1.

[0031] Specifically, the guiding head 8 can guide the entire positioning device to smoothly enter the inner holes of the flange 10 and the nozzle 11, avoiding deflection or jamming during the insertion process, making the insertion and extraction processes of the inner hole positioning device smoother and faster; in addition, foreign objects can be prevented from entering the support positioning tube 1.

[0032] As shown in the figure, a handle 9 is provided on the movable telescopic rod 5.

[0033] Specifically, through the handle 9, the operator can easily push or pull the movable telescopic rod 5 to achieve its axial movement within the support positioning tube 1.

[0034] When the inner hole positioning device of the present application is in use, one end of the guiding head is inserted into the inside of the flange and the nozzle. Therefore, one end of the guiding head is the front end of the inner hole positioning device, and the handle end is the tail end of the inner hole positioning device.

[0035] Advantages of the present application compared with the prior art:

[0036] An inner hole positioning device of the present application is provided with a support positioning tube 1, an expansion positioning opening 2 is provided on the support positioning tube 1, a positioning elastic piece 3 is provided outside the expansion positioning opening 2, an inner support elastic piece 4 is provided inside the expansion positioning opening 2, a movable telescopic rod 5 is provided inside the support positioning tube 1, and an inner expansion sleeve 6 is provided on the movable telescopic rod 5. The operator pulls the movable telescopic rod 5 along the axial direction of the support positioning tube 1, so that the inner support elastic piece 4 is expanded outward under the pressure of the inner expansion sleeve 6 to provide support for the expansion of the positioning elastic piece 3; the positioning elastic piece 3 is closely attached to the inner walls of the flange 10 and the nozzle 11, and fixes the flange 10 and the nozzle 11 in a relative position through its elastic force to achieve precise positioning. The present application realizes the expansion or contraction of the inner support elastic piece 4 and the positioning elastic piece 3 by setting the movable telescopic rod 5, so that the inner hole positioning device can closely fit the inner walls of the flange 10 and the nozzle 11, ensuring the relative position of the two is accurate and error-free during the docking process. The operator only needs to control the axial movement of the movable telescopic rod 5 to complete the docking positioning, greatly reducing the complexity of the operation and the requirements for the operator's skills. One person can complete the operation, significantly improving the work efficiency.

[0037] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0038] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can also be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. An inner hole positioning device, provided with a supporting positioning tube (1), wherein the supporting positioning tube (1) is provided with an expansion positioning opening (2), characterized in that: A positioning spring piece (3) is arranged outside the expansion positioning opening (2), an inner supporting spring piece (4) is arranged inside the expansion positioning opening (2), a movable telescopic rod (5) is arranged inside the supporting positioning tube (1), and an inner expansion sleeve (6) is arranged on the movable telescopic rod (5).

2. An inner hole positioning device according to claim 1, characterized in that: The supporting and positioning tube (1) is evenly distributed with a plurality of expansion and positioning openings (2).

3. The inner hole positioning device according to claim 1, characterized in that: The support positioning tube (1) is provided with a positioning limit opening (7), the positioning limit opening (7) being arranged in one-to-one correspondence with the expansion positioning opening (2), the front end of the positioning spring sheet (3) is provided with a positioning limit plate (31), the positioning limit plate (31) passes through the positioning limit opening (7) and is placed inside the support positioning tube (1).

4. The inner hole positioning device according to claim 1, characterized in that: The movable telescopic rod (5) is threadedly connected to the supporting positioning tube (1), and the tail end of the inner supporting spring sheet (4) is fixedly installed inside the supporting positioning tube (1).

5. The inner hole positioning device according to claim 1, characterized in that: The front end of the supporting and positioning tube (1) is provided with a guide head (8).

6. The inner hole positioning device according to claim 1, characterized in that: The movable telescopic rod (5) is provided with a handle (9).

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