Pipe penetrating and positioning tool for heat exchange pipe
The combination of positioning rod and positioning sleeve solves the problem of inconsistent extension lengths when welding heat exchange tubes to tube sheets, achieving accurate positioning and consistency, and improving the quality and efficiency of sealing welding.
Patent Information
- Application Number
- CN202520461791.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2035-03-17
AI Technical Summary
In the existing technology, when welding heat exchange tubes to tube sheets, there is an inconsistency in the extension length of the heat exchange tubes, which can easily damage the heat exchange tubes and affect the quality of the sealing weld and work efficiency.
The system employs a combination of positioning rods and positioning sleeves. The extension length of the heat exchange tubes is adjusted by threaded sections and locking nuts, and guided by guide rods to ensure accurate positioning and consistency between the heat exchange tubes and the tube sheet.
It achieves accurate positioning of heat exchange tubes and consistency of extension length, improves the quality and efficiency of sealing welding, has a wide range of applications, and is easy to operate.
Smart Images
Figure CN223997714U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a heat exchanger tube insertion and positioning fixture, and more particularly to a positioning fixture for inserting heat exchanger tubes into tube sheets. Background Technology
[0002] Heat exchanger tubes and tube sheets are important components of a heat exchanger, such as... Figure 1 As shown, when welding heat exchange tube 10 to tube sheet 9, heat exchange tube 10 often needs to extend a certain length beyond tube sheet 9. In actual production, the extension length is usually adjusted by manual hammering or guiding the tube, and then spot welding is performed to fix it in place. This method has the following problems: 1) Direct hammering or guiding the tube can easily damage the heat exchange tube and affect its quality; 2) Due to the large number of heat exchange tubes, it is difficult to ensure that the extension length of the heat exchange tube meets the requirements of the drawing. The consistency of the extension length of the heat exchange tube is poor, and there is often a large deviation, which in turn affects the quality of the sealing weld. Summary of the Invention
[0003] The purpose of this utility model is to address the above-mentioned shortcomings of the existing technology by providing a heat exchanger tube insertion and positioning fixture. It has the advantages of accurate tube insertion and positioning, good consistency of extension length, can ensure the quality of sealing welding, and has a wide range of applications, is easy to operate, and can improve work efficiency.
[0004] To achieve the above objectives, this utility model provides a heat exchanger tube insertion and positioning fixture, comprising a positioning rod and a positioning sleeve; characterized in that: the positioning rod has a threaded section in the middle, the positioning sleeve has a threaded hole at the rear and is connected to the threaded section, a locking nut is connected to the threaded section at the rear of the positioning sleeve, the front section of the positioning sleeve is fitted over the positioning rod, the positioning rod at the front of the threaded section has a positioning end face, the positioning end face is located axially behind the front end face of the positioning sleeve, and the side wall of the positioning sleeve at the front of the threaded hole has at least one notch.
[0005] When this utility model is in use, the front end face of the positioning sleeve contacts the tube sheet, and after the heat exchange tube passes through the tube sheet, it contacts the positioning end face. The axial position of the tube sheet and the heat exchange tube is accurately positioned. The distance between the positioning end face of the positioning rod and the front end face of the positioning sleeve is the extension length of the heat exchange tube. The two are spot welded and fixed at the notch. It has the advantages of accurate tube positioning and good consistency of extension length, which can ensure the quality of sealing welding. Furthermore, by adjusting the axial position of the positioning sleeve on the threaded section and fixing it with the lock nut, it can meet the tube insertion needs of different extension lengths. It has a wide range of applications, is easy to operate, and can improve work efficiency.
[0006] As a further improvement of this utility model, a guide rod is fixedly connected to the positioning rod on the front side of the positioning end face. The outer diameter of the guide rod is smaller than the outer diameter of the positioning end face. The guide rod is placed in the tube hole of the tube sheet, and the heat exchange tube is sleeved on the outside of the guide rod, which can guide the heat exchange tube through the tube.
[0007] As a further improvement of this utility model, the length of the threaded section is greater than the sum of the lengths of the threaded hole and the locking nut; the extension length of the tube can be adjusted within a large range.
[0008] In summary, this utility model has the advantages of accurate tube positioning and good consistency of extension length, which can ensure the quality of sealing welding. It also has a wide range of applications, is easy to operate, and can improve work efficiency. Attached Figure Description
[0009] Figure 1 This is a front view of the connection between the heat exchange tubes and the tube sheet.
[0010] Figure 2 This is a front view of an embodiment of the present utility model.
[0011] Figure 3 for Figure 2 Front view of the positioning rod.
[0012] Figure 4 for Figure 2 The front view of the positioning sleeve.
[0013] Figure 5 This is a front view of the usage state of an embodiment of this utility model. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings.
[0015] like Figures 2 to 4 As shown, a heat exchanger tube insertion and positioning fixture of this embodiment includes a positioning rod 1 and a positioning sleeve 5. The positioning rod 1 has a threaded section 2 in the middle. The rear section of the positioning sleeve 5 has a threaded hole 7 and is connected to the threaded section 2. A locking nut 8 is connected to the threaded section 2 on the rear side of the positioning sleeve 5. The front section of the positioning sleeve 5 is fitted over the positioning rod 1. The positioning rod on the front side of the threaded section 2 has a positioning end face 3. The positioning end face 3 is located axially behind the front end face of the positioning sleeve 5. A guide rod 4 is integrally fixed to the positioning rod on the front side of the positioning end face 3. The outer diameter of the guide rod 4 is smaller than the outer diameter of the positioning end face 3. Notches 6 are provided on the opposite sidewalls of the positioning sleeve 5 on the front side of the threaded hole. The length of the threaded section 2 is greater than the sum of the lengths of the threaded hole 7 and the locking nut 8.
[0016] When using this utility model, such as Figure 5As shown, after determining the extension length, the position of the positioning sleeve 5 is fixed by the locking nut 8; the front end face of the positioning sleeve 5 contacts the tube sheet 9, the heat exchange tube 10 enters the tube hole and is sleeved on the guide rod 4. After the heat exchange tube 10 passes through the tube sheet 9, its outer end contacts the positioning end face 3, which can accurately position the axial position of the tube sheet 9 and the heat exchange tube 10. The distance between the positioning end face 3 of the positioning rod 1 and the front end face of the positioning sleeve 5 is the extension length of the heat exchange tube 10. The two are spot welded and fixed at the notch 6. It has the advantages of accurate tube positioning and good consistency of extension length, which can ensure the quality of the sealing weld. Moreover, by adjusting the axial position of the positioning sleeve 5 on the threaded section 2 and fixing it with the locking nut 8, it can meet the needs of tube insertion with different extension lengths. It has a wide range of applications, is easy to operate, and can improve work efficiency. The guide rod 4 can guide the heat exchange tube insertion, reduce position error, and improve welding quality.
[0017] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative purposes and are not intended to limit this utility model to the scope of the described embodiments.
Claims
1. A heat exchange tube penetrating positioning tool, comprising a positioning rod and a positioning sleeve; characterized in that: The middle part of the positioning rod is provided with a threaded section, the rear section of the positioning sleeve is provided with a threaded hole and is connected with the threaded section, the threaded section on the rear side of the positioning sleeve is connected with a locking nut, the front section of the positioning sleeve is sleeved on the outside of the positioning rod, the positioning rod on the front side of the threaded section is provided with a positioning end face, the positioning end face is located axially behind the front end face of the positioning sleeve, and the sidewall of the positioning sleeve on the front side of the threaded hole is provided with at least one notch.
2. The heat exchange tube threading positioning tool according to claim 1, characterized in that: A guide rod is fixedly connected to the positioning rod on the front side of the positioning end face, and the outer diameter of the guide rod is smaller than the outer diameter of the positioning end face.
3. The heat exchange tube threading positioning tool according to claim 1 or 2, characterized in that: The length of the threaded section is greater than the sum of the length of the threaded hole and the length of the locking nut.