Supporting tool for tube panel at hole opening position of combustor

Abstract

The utility model discloses a supporting tool for a tube panel at the position of a burner hole. The supporting tool comprises a sleeve. Fixing nuts are fixedly connected to the two ends of the sleeve, the thread screwing directions of the two fixing nuts are opposite, the fixing nuts are connected with respective studs through threads, movable nuts are arranged on the two studs, clamping hooks are fixedly connected to the outer ends of the two studs, openings are formed in the lower sides of the clamping hooks, and V-shaped grooves are formed in the outer side faces of the connecting ends of the clamping hooks and the respective studs. A limiting bolt is arranged at the other end, opposite to the connecting end, of the clamping hook and located below the center line of the V-shaped groove. According to the utility model, the fixing mode of welding is avoided, the production and manufacturing quality is ensured, the working procedures are reduced, the device can be suitable for opening holes in tube panels with different diameters, the universality is good, and materials can be saved.

Description

Technical Field

[0001] This utility model relates to a support fixture for a tube screen, particularly a support fixture for a tube screen at the opening of a boiler burner. Background Technology

[0002] During boiler tube panel manufacturing, due to the large amount of welding and significant welding shrinkage deformation, the burner opening size needs effective control to prevent this deformation from reducing the diameter of the burner opening and affecting subsequent assembly. Currently, the support fixtures at the tube panel openings include... Figure 1 As shown, after the assembly and welding are completed, the steel profile 13 is spot-welded to the top bend 12 of the tube panel 11 along its diameter.

[0003] This method has the following main problems:

[0004] During the welding process, the welding heat input will cause changes in the microstructure and properties of the base material of the bend 12. At the same time, the elemental composition of the welding material may be different from that of the steel pipe. During welding, these elements react chemically with the base material, thereby affecting the mechanical properties and corrosion resistance of the bend 12.

[0005] After the welding stress of the pipe screen hole structure is released, the fixed steel 13 needs to be removed. After the removal, the surface of the bent pipe 12 needs to be ground and inspected, which adds unnecessary manufacturing steps and reduces production efficiency.

[0006] The opening dimensions of different models of tube screens are inconsistent, and the length of fixed steel section 13 varies within a certain range, which increases the material preparation work of the section and increases material loss. Summary of the Invention

[0007] The purpose of this utility model is to address the above-mentioned shortcomings of the prior art by providing a support fixture for the tube screen at the burner opening. It avoids the welding support method, reduces the number of processes while ensuring the quality of production and manufacturing, and can be applied to tube screen openings of different diameters. It has good versatility and can save materials.

[0008] To achieve the above objectives, this utility model provides a support fixture for a tube screen at a burner opening, comprising a sleeve; characterized in that: a fixing nut is fixedly connected to both ends of the sleeve, the threads of the two fixing nuts are opposite, each fixing nut is threadedly connected to its own stud, each stud is provided with a movable nut, the outer end of each stud is fixedly connected to a hook, the lower side of the hook is provided with an opening, the outer side of the hook connected to its respective stud is provided with a V-shaped groove, the other end of the hook opposite to the connecting end is provided with a limiting bolt threadedly, the limiting bolt is located below the center line of the V-shaped groove.

[0009] This utility model allows the hooks at the outer ends of the two studs to extend simultaneously by rotating the sleeve. Their V-shaped grooves completely fit the bent pipe at the opening of the tube screen. Then, rotating the movable nut tightens the two fixed nuts, which can fix the position of the two hooks and achieve support for the tube screen. Then, screwing in two limiting bolts limits the opening width and prevents the tube screen from falling off during lifting and transportation.

[0010] This utility model avoids the welding support method, reduces the number of processes while ensuring the quality of production and manufacturing, and can be used for openings of pipe screens of different diameters and bends of different diameters by adjusting the extension length of the two hooks. It is reusable, has good versatility, and can save materials.

[0011] As a further improvement of this utility model, the sleeve is provided with a central hole in the middle, and a pin passes through the central hole; the pin facilitates the rotation of the sleeve.

[0012] As a further improvement of this utility model, the center line of the V-groove coincides with the axis of the sleeve; it can provide radial support force for the bent pipe at the opening of the tube screen, improve the support effect and prevent deformation in other directions;

[0013] In summary, this utility model avoids the welding support method, reduces the number of processes while ensuring manufacturing quality, and is applicable to openings in tube screens of different diameters, with good versatility and material savings. Attached Figure Description

[0014] Figure 1 The main view of the support fixture at the opening of the existing tube screen.

[0015] Figure 2 This is a front view of the usage state of an embodiment of this utility model.

[0016] Figure 3 for Figure 2 The front view of the card hook. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figures 2 to 3As shown, a support fixture for a tube screen at a burner opening in this embodiment includes a sleeve 1 with a central hole in the middle, through which a pin 2 passes. Fixing nuts 3 are welded and fixed to both ends of the sleeve 1, with opposite thread directions. Each fixing nut 3 is threadedly connected to a stud 4. Each stud 4 has a threaded movable nut 5. Hooks 6 are welded and fixed to the outer ends of both studs 4. The lower side of each hook 6 has an opening 7. The outer side of the hook 6 connecting to its respective stud has a V-groove 8. The other end of the hook 6 opposite to the connecting end has a threaded limiting bolt 9 located below the center line of the V-groove. The center line of the V-groove 8 coincides with the axis of the sleeve 1.

[0019] When using this utility model, loosen the movable nut 5, adjust the two studs 4 to a suitable length, place the two sides of the curved pipe 12 at the top of the tube panel 11 in the diameter direction into the openings 7 of the two hooks 6, and rotate the sleeve 1 by the pin 2 so that the two studs 4 and the hooks 6 can extend outward at the same time, and their V-grooves 8 fit against the curved pipe 12 at the opening. Then rotate the movable nut 5 to tighten the two fixed nuts 3 to fix the position of the two hooks 6 and achieve support for the tube panel; then screw in the two limiting bolts 9 to limit the opening width and prevent the tube panel from falling off during lifting and transportation.

[0020] This utility model avoids the welding support method, reduces the number of processes while ensuring the quality of production and manufacturing, and can be used for openings of pipe screens of different diameters and bends of different diameters by adjusting the extension length of the two hooks 6. It is reusable, has good versatility, and can save materials; the pin 2 facilitates the rotation of the sleeve 1.

[0021] The above embodiments have been used to illustrate the invention, but it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments.

Claims

1. A support fixture for a tube panel at a burner opening, comprising a sleeve; characterized in that: Fixed nuts are fixed at both ends of the sleeve. The threads of the two fixed nuts are turned in opposite directions. Each fixed nut is connected to its own stud by the thread. Each stud is provided with a movable nut. The outer end of each stud is fixed with a hook. The lower side of the hook is provided with an opening. The outer side of the hook and its connection end with the stud is provided with a V-shaped groove. The other end of the hook opposite to the connection end is provided with a limit bolt. The limit bolt is located below the center line of the V-shaped groove.

2. The support fixture for the tube panel at the burner opening as described in claim 1, characterized in that: The sleeve has a central hole in the middle, and a pin passes through the central hole.

3. A support fixture for a tube sheet at a burner opening as described in claim 1 or 2, characterized in that: The center line of the V-groove coincides with the axis of the sleeve.

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