Boiler burner rigid lance

Abstract

Generally described, one or more aspects of the present disclosure relate to a rigid lance of a boiler burner device. The rigid lance includes a first tube having a first diameter, a second tube having a second diameter larger than the first diameter, a hexagonal bar connecting the first tube with the second tube, and a sealing gasket positioned between the first tube and the second tube.

Claims

1. A rigid lance of a boiler burner device, the rigid lance comprising: a first tube having a longitudinally extended body, the longitudinally extending body including a first end, a second end comprising a shoulder, a first length, and a first diameter, wherein the first length is longer than the first diameter; a second tube having a longitudinally extended body with a first end comprising an external threaded portion, a second end, a second length, and a second diameter larger than the first diameter, wherein the second length is longer than the second diameter; a sealing gasket positioned between the second end of the first tube and the first end of the second tube and adjacent to the shoulder; a hexagonal bar comprising a first face positioned against the shoulder of the first tube and a threaded portion connecting to the external threaded portion of the second tube such that the shoulder is positioned interior to the hexagonal bar and the first tube is connected to the second tube; a burner nozzle connected to the first end of the first tube; and wherein the burner nozzle and the first length of the first tube are configured to be inserted into a boiler; and wherein the longitudinally extending body of the first tube, the longitudinal extending body of the second tube, and the burner nozzle are coaxial.

2. The rigid lance of claim 1, wherein the hexagonal bar further comprises a threadless portion.

3. The rigid lance of claim 1, wherein a length of the rigid lance is approximately 3000 mm.

Description

BRIEF DESCRIPTION OF FIGURES

(1) FIG. 1 is a graphical representation of the lance of the present utility model in the assembled condition, with the burner nozzle positioned.

(2) FIG. 2 is a representation of the rigid lance of the present utility model illustrating internal details of the tubes to be connected.

(3) FIG. 3 is a graphic representation of the rigid lance of the present utility model, without receiving the burner nozzle, in the disassembled condition.

(4) FIG. 4 is a photograph illustrating an example of a physical space available for removing the lance, while FIG. 5 represents the lance in its effective length in this exemplary embodiment.

DETAILED DESCRIPTION OF THE UTILITY MODEL

(5) The present utility model aims at describing a lance applicable to a boiler burner, preferably, but not limited to, an oil boiler, the lance being presented in a rigid shape. By means of the device disclosed herein, it becomes possible to carry out maintenance, assembly, disassembly and replacement of oil lances for boiler burners that are operational in places with limited space. The lance provided by the present utility model comprises a modular structure consisting of rigid elements, which allows achieving a correct positioning of the burner nozzle using this lance, in relation to the boiler. Consequently, it is guaranteed that the boiler operates under ideal operating conditions, once the burning in the burner portion is controlled. For this purpose, the device disclosed in the present utility model comprises a hexagonal bar 1 that provides the interconnection of a first tube 2 to be interconnected with a second tube 4 of greater diameter, wherein between the first tube 2 and the second tube 4 the arrangement of a sealing gasket 3 is provided.

(6) In order to preserve the features that provide to the device the condition of a rigid structure, the elements such as the first tube 2, the second tube 4 and the hexagonal bar 1 are preferably made of metallic material, for example, carbon steel. It should be noted that the lance provided by the present utility model has full adequacy capacity in relation to its dimensions. In practice, it is possible to adapt the total dimension of the lance and its segments in modules to suit a wide variety of boilers, depending on the space available for removing/inserting the lance. With regard specifically to the thickness, a technician skilled on the subject is clearly able to recognize that the thickness must vary according to the safety conditions that meet the determined pressure in each application.

(7) In particular, FIG. 3 is a graphic representation of the rigid lance of the present utility model, without receiving the burner nozzle. The view represented in FIG. 3 is a view wherein the component elements of the lance are seen separately, but side by side, in order to illustrate how their positioning is composed in the final structure of the utility model. In turn, FIG. 1 presents a graphical representation of the lance of the present utility model in an assembled condition, with the burner nozzle positioned.

(8) Precisely, the tube 2 to be interconnected appears as a longitudinally extended body, with the first end coinciding with most of its longitudinal structure. The second end of the tube 2 has a shoulder, wherein said shoulder makes the diameter of that second end compatible with the diameter of the first end of the tube 4. The compatibility between the second end of the tube 2 and the first end of the tube 4 coincides with the structure of the sealing gasket 3. Accordingly, the second tube 4 appears as a longitudinally extended body. Its first end, as previously reported, has a shape and dimension compatible with the second end of the tube 2. In addition, the first end of the tube 4 has an external threaded portion responsible for receiving an internal thread available on the hexagon bar 1. After that threading, the longitudinally extended body of the tube 2 continues until it ends, representing its second end.

(9) As to the hexagonal bar 1, this has part of its interior provided with internal threads (ii), while the second portion of its interior is smooth (i).

(10) Regarding the sealing gasket, the selection of this element can be made based on commercially available sealing gaskets for suitable conditions of temperature, pressure and fluid in use, such as, for example, a Teadit TJE.

(11) Consequently, especially referring to the graphic image available in FIG. 2, it is possible to observe that the hexagonal bar 1 is inserted from the first end of the tube 2, initially by its threaded portion ii. Thus, the hexagonal bar crosses the tube 1 longitudinally until it passes through the shoulder of the second end of the tube 2. At this point, the sealing joint is covered by the hexagonal bar 1 and the hexagonal bar 1 itself begins the threading with the first portion of the tube 4 provided with external threads. Once the threading is complete, the rigid lance is assembled, sealed and ready for use.

(12) The final structure presented is a rigid, safe and sealed structure, completely adaptable in terms of size and diameter to suit the most diverse boilers available. Additionally, as a result, the present utility model makes it possible to achieve a robust structure, with much less wear than observed in previously available techniques in the field of this matter.

(13) It should be clear that the matter defined in the present specification is presented in terms of its preferred embodiment, and that modifications can be applied to the conditions defined herein and are still encompassed by the scope as defined and claimed in the present application.