Introduce the specific function of the elliptical head and the corresponding measures to prevent cracking.

Small products, big impact—each product has its own value, and so does the elliptical head. Elliptical heads are widely used in industries such as crude oil, electronic devices, chemical plants, textile manufacturing, food processing, machinery and equipment, engineering construction, nuclear power plants, and aerospace.

An ellipsoidal head is a type of closure consisting of two parts: a rotating ellipsoidal surface and a cylindrical straight section. If a pipeline stops and needs to be expanded, an ellipsoidal head can be welded onto the pipe for use as an end closure. Alternatively, it can be used on high-pressure vessels, where there are two heads on either side and a straight tube section in the middle, serving as a bottle for pressure piping.

The physical properties of the elliptical head are only slightly inferior to those of the hemispherical head, yet superior to the dish head. Due to the depth of the elliptical head being between that of the hemispherical and dish heads, the specifications for press machines and molds, as well as the difficulty coefficient in production manufacturing, also fall between the two, meaning it is much easier than the hemispherical head but more challenging than the dish head.

Due to the adoption of stamping processing technology, it has added convenience to the production of large-diameter standard elliptical heads. The elliptical heads, with their comprehensive performance, are widely used in medium and low-pressure vessels. To prevent the elliptical heads from cracking, it is crucial to first conduct quality inspections on the raw materials, ensuring that there are no internal or external defects in the raw materials for the elliptical heads. When performing laser cutting on square billets, it is essential to ensure that the nearby areas are ground and polished to be as smooth as possible.

Secondly, enhance the elliptical head in terms of material, utilizing high-quality raw materials without altering the forming process; increase the processing environmental temperature of the elliptical head, and perform the stamping process under moderate temperatures; opt for the solution heat treatment method, which can effectively restore the martensitic properties immediately.

Improvements have also been made in the quality of welding. Prior to the spinning of the elliptical head, a detailed inspection of external environmental defects is conducted, selecting a more suitable welding method. This can effectively enhance the physical properties of the welding at the joint, reducing the area of thermal damage.

Why does an ellipsoidal head require a locking device?

The elliptical head with a locking mechanism includes a cylindrical slope, conical slope, spherical slope, and clamp. The cylindrical slope of the new product is interconnected with the bottom of the conical slope, the top of the conical slope of the new product is connected to the spherical slope, and the edge of the cylindrical slope of the new product is equipped with a clamp. The clamp of the new product is threaded to the cylindrical slope. Through these methods, the elliptical head with a locking mechanism of this product features a compact structure, strong head connection characteristics, high reliability, and durability.

The ellipsoidal head includes an upper inclined edge, a cone, and a lower inclined edge. The cone of the new product connects to the upper inclined edge and lower straight edge of the new product, respectively. At these connections, the upper inclined edge and the cone form a transition slope, as does the lower inclined edge with the cone. The cone of the new product has a 60° taper. This ellipsoidal head is advantageous for collecting and discharging solids-containing materials, featuring a small taper, strong load-bearing capacity, even distribution of load, and good luster. The presence of the transition slopes makes the inclined edges less prone to cracking, making it suitable for the rear covers or reducers of chemical equipment.

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