Large non-standard furnace body welding gap adjustment fixture
By designing clamping and propulsion components, the problem of labor-intensive and experience-intensive manual alignment in the welding of large non-standard furnace bodies was solved, achieving precise alignment and flatness of steel plates, and improving welding quality and structural safety of the furnace body.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN CONSTR & INSTALLATION JOINT STOCK
- Filing Date
- 2025-05-29
- Publication Date
- 2026-07-31
AI Technical Summary
Existing technologies rely on manual alignment of steel plates during the welding of large, non-standard furnace bodies. This process is labor-intensive, requires a high level of experience, and results in large alignment errors, affecting weld quality and furnace sealing, and easily leading to fatigue cracks.
By employing clamping and pushing components, and utilizing a double-threaded nut and bolt structure, the steel plates are synchronously and uniformly aligned and precisely pushed forward, replacing manual alignment and ensuring precise control of the flatness of the steel plates and the joint gap.
It improves welding efficiency and consistency, reduces reliance on operator experience and manpower, lowers weld seam errors, and enhances the structural safety and service life of the furnace body.
Smart Images
Figure CN224574955U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of welding equipment, specifically relating to a large non-standard furnace body welding gap adjustment fixture. Background Technology
[0002] Large, non-standard furnace shells consist of a bottom plate and surrounding plates. The surrounding plates are assembled from welded steel plates, requiring extensive welding and smooth weld seams. The upper and lower steel plates must be internally aligned and level. However, current technology often relies on manual alignment by operators, consuming significant manpower. Furthermore, manual alignment demands a high level of experience from the operators; excessive excess height can create sharp geometric abrupt changes, which, under alternating loads such as thermal expansion and contraction of the furnace body, can easily lead to fatigue cracks. Excessive flatness of the surrounding plates can also affect the furnace's sealing performance, causing high-temperature gas leakage. Utility Model Content
[0003] A large non-standard furnace body welding gap adjustment fixture is characterized by comprising a clamping assembly and a pushing assembly. The clamping assembly includes a first connecting plate, a first bolt, a sleeve, and a double-threaded nut. The first connecting plate is trapezoidal, with its short bottom edge fixed to the top of the outer side of the sleeve. The inner side of the sleeve is fixed to the first bolt. The inner side of the double-threaded nut is symmetrically provided with threads in opposite directions, and the two first bolts are symmetrically threadedly connected in the double-threaded nut.
[0004] The propulsion assembly includes a second connecting plate, a connecting block, and a propulsion plate. The lower width of the second connecting plate is greater than the upper width. The connecting block is fixed to the top of the second connecting plate. A horizontal screw hole is opened in the middle of the connecting block. A second bolt is threaded into the screw hole of the connecting block. The propulsion plate is fixed to the end of the second bolt.
[0005] Furthermore, a circular hole is formed on the outer wall of the double-grooved nut, and a torque rod is inserted into the circular hole to push the torque rod to rotate the double-grooved nut.
[0006] Furthermore, a circular hole is made on the side of the nut of the second bolt, and a torque rod is inserted into the circular hole to push the torque rod to rotate the second bolt.
[0007] In use, weld the first connecting plate of the clamping assembly to the inner edge of each of the two steel plates, and weld the second connecting plate of the pushing assembly to the outer edge of one of the steel plates, aligning the pushing plate with the other steel plate. First, rotate the double-threaded nut to gradually bring the two steel plates closer together and reduce the gap, then rotate the second bolt to push the steel plate aligned with the pushing plate until it is flush with the other steel plate.
[0008] The beneficial effects of this utility model are as follows:
[0009] By simultaneously and symmetrically tightening the double-threaded nuts of the clamping assembly, the two first bolts can be tightened, bringing the two steel plates to be welded closer together synchronously and evenly, effectively reducing the butt joint gap. By advancing the second bolt and the advance plate of the assembly, a precise lateral thrust can be applied to one of the steel plates, achieving precise alignment and flatness of the end faces of the two plates. This replaces manual alignment, which relies entirely on human labor, reducing dependence on operator experience and manpower, and improving assembly efficiency and consistency. Precise control of the butt joint gap and the flatness of the steel plate edges creates favorable conditions for subsequent welding, reducing problems such as excessive weld reinforcement or unevenness caused by manual alignment errors, and avoiding the formation of sharp geometric abrupt changes. A smooth weld significantly reduces the risk of fatigue cracks under alternating loads such as thermal expansion and contraction, improving the structural safety and service life of the furnace body. Attached Figure Description
[0010] Figure 1 Schematic diagram of the structure of the welding gap adjustment fixture for large non-standard furnace bodies
[0011] Wherein: 1-clamping assembly, 11-first connecting plate, 12-first bolt, 13-sleeve, 14-double-threaded nut, 2-propulsion assembly, 21-second connecting plate, 22-connecting block, 23-propulsion plate, 24-second bolt, 3-torque rod, 4-steel plate. Detailed Implementation
[0012] Example 1: A large non-standard furnace body welding gap adjustment fixture, including a clamping assembly 1 and a pushing assembly 2, wherein the clamping assembly includes a first connecting plate 11, a first bolt 12, a sleeve 13 and a double-threaded nut 14. The first connecting plate 11 is trapezoidal, and its short bottom edge is fixed to the top of the outer side of the sleeve 13. The inner side of the sleeve 13 is fixed to the first bolt 12. The inner side of the double-threaded nut 14 is symmetrically provided with threads in opposite directions, and the two first bolts 12 are symmetrically threadedly connected to the double-threaded nut 14.
[0013] The propulsion assembly 2 includes a second connecting plate 21, a connecting block 22, a propulsion plate 23, and a second bolt 24. The lower width of the second connecting plate 21 is greater than the upper width. The connecting block 22 is fixed to the top of the second connecting plate 21. A horizontal screw hole is opened in the middle of the connecting block 22. The second bolt 24 is threaded into the screw hole of the connecting block 22. The propulsion plate 23 is fixed to the end of the second bolt 24.
[0014] A round hole is made on the outer wall of the double-grooved nut 14, and a torque rod 3 is inserted into the round hole to push the torque rod 3 to make the double-grooved nut 14 rotate.
[0015] A round hole is made on the side of the nut of the second bolt 24, and a torque rod 3 is inserted into the round hole. Pushing the torque rod 3 causes the second bolt to rotate.
[0016] In use, the first connecting plate 11 of the clamping assembly 1 is welded to the inner edges of the two steel plates 4 respectively, and the second connecting plate 21 of the pushing assembly 2 is welded to the outer edge of one of the steel plates 4, and the pushing plate 23 is aligned with the other steel plate 4. First, rotate the double-threaded nut 14 to gradually bring the two steel plates 4 closer together and reduce the gap, then rotate the second bolt 24 to push the steel plate 4 aligned with the pushing plate 23 to be flush with the other steel plate 4. Then welding is performed. After welding, the device can be cut off from the steel plate 4, or it can be left on the steel plate 4 to reinforce the connection tightness of the steel plates 4.
Claims
1. A welding gap adjustment fixture for a smelting furnace vessel, characterised in that: It includes a clamping assembly and a propulsion assembly. The clamping assembly includes a first connecting plate, a first bolt, a sleeve, and a double-threaded nut. The first connecting plate is trapezoidal, with its short base fixed to the top of the outer side of the sleeve. The inner side of the sleeve is fixed to the first bolt. The inner side of the double-threaded nut is symmetrically provided with threads in opposite directions, so that the two first bolts are symmetrically threadedly connected in the double-threaded nut. The propulsion assembly includes a second connecting plate, a connecting block, and a propulsion plate. The lower width of the second connecting plate is greater than the upper width. The connecting block is fixed to the top of the second connecting plate. A horizontal screw hole is opened in the middle of the connecting block. A second bolt is threaded into the screw hole of the connecting block. The propulsion plate is fixed to the end of the second bolt.
2. The smelting furnace body welding gap adjustment clamp as claimed in claim 1, characterized in that A circular hole is made on the outer wall of the double-grooved nut, and a torque rod is inserted into the circular hole to push the torque rod to make the double-grooved nut rotate.
3. The smelting furnace vessel welding gap adjustment fixture of claim 1, wherein A round hole is made on the side of the nut of the second bolt, and a torque rod is inserted into the round hole. Pushing the torque rod causes the second bolt to rotate.