Head housing for curing pipeline resin lining

Abstract

A head housing for curing of resin pipeline lining used in heads for curing inner pipeline resin linings with significantly increased heat dissipation efficiency, having at least one cooling passage (6), which length S is more than twice the length L of the longitudinal part (1) of this housing.

Claims

1. A head housing for curing of resin pipeline lining comprising: a base; a mounting ring raised face (2) at a first end of the base; a ring raised face (3) at a second end of the base; an inlet (4) mounted on a conical recess (8) on a front surface (9) of the ring raised face (3); an outlet (5) located at the front surface (9) of the ring raised face (3); at least one spiral shape cooling passage (6) extending from the inlet (4) to the outlet (5), the at least one spiral cooling passage (6) having a spiral line having a first radius (R1) by the inlet (4) and a second radius (R2) by the outlet (5), wherein R2=0.5R1; the at least one cooling passage (6) having a length S more than twice a length L of a longitudinal part (1) of the housing.

2. The head housing as claimed in claim 1, wherein a cross-section of the at least one spiral shape cooling passage (6) is constant over its entire length.

3. The head housing as claimed in claim 1, wherein the outlet (5) of the at least one spiral shape cooling passages (6) is positioned on a side surface (7) of the ring raised face (3) of the housing.

4. The head housing as claimed in claim 1, wherein a cross-section of the at least one spiral shape cooling passage (6) has a circular shape.

5. The head housing as claimed in claim 1, wherein a cross-section of the at least one spiral shape cooling passage (6) has a rectangular shape.

6. The head housing as claimed in claim 1, wherein the cooling passages (6) are evenly distributed with respect to an X axis of the housing.

7. The head housing as claimed in claim 1, wherein the housing includes a centrally located hole (14) for power supply wires (15) of head components.

8. The head housing as claimed in claim 1, wherein the housing is made of metal with 3D printing technology.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a perspective view of a single cooling passage with a circular cross-section for use in a housing according to the first embodiment of the invention;

(2) FIG. 2 shows a perspective view of a set of three cooling passages located next to each other for use in a housing according to the second embodiment;

(3) FIG. 3 shows a prospective view of a system of five sets of three cooling passages to be used in a housing according to the third embodiment from the side of their inlets/outlets;

(4) FIG. 4 shows a prospective view of the same system of passages from the side of the blind part of the housing;

(5) FIG. 5 shows a side view of the same system of passages;

(6) FIG. 6 shows a cross-section of the same system of passages along the line A-A;

(7) FIG. 7 shows a side view of an exemplary housing with a system of five sets of three cooling passages;

(8) FIG. 8 shows a cross-section of the same housing along the line B-B;

(9) FIG. 9 shows a perspective view of a single cooling passage with a longitudinal rectangular section to be used in a housing according to the fourth embodiment;

(10) FIG. 10 shows a cross-section of an exemplary housing with a system of three sets of three cooling passages with a rectangular section along the line B-B; and

(11) FIG. 11 shows a cross-section of an exemplary head with a housing with a system of cooling passages of rectangular section installed in it.

DETAILED DESCRIPTION OF THE INVENTION

(12) The object of the invention is shown in examples of the invention in FIGS. 1 to 11, where FIG. 1—shows a perspective view of a single cooling passage with a circular cross-section for use in a housing according to the first embodiment of the invention, FIG. 2—shows a perspective view of a set of three cooling passages located next to each other for use in a housing according to the second embodiment, FIG. 3—shows a prospective view of a system of five sets of three cooling passages to be used in a housing according to the third embodiment from the side of their inlets/outlets, FIG. 4—shows a prospective view of the same system of passages from the side of the blind part of the housing, FIG. 5—shows a side view of the same system of passages, FIG. 6—shows a cross-section of the same system of passages along the line A-A, FIG. 7—shows a side view of an exemplary housing with a system of five sets of three cooling passages, FIG. 8—shows a cross-section of the same housing along the line B-B, FIG. 9—shows a perspective view of a single cooling passage with a longitudinal rectangular section to be used in a housing according to the fourth embodiment, FIG. 10—shows a cross-section of an exemplary housing with a system of three sets of three cooling passages with a rectangular section along the line B-B, and FIG. 11—shows a cross-section of an exemplary head with a housing with a system of cooling passages of rectangular section installed in it.

1.SUP.st .Embodiment

(13) A housing according to the first embodiment comprises a longitudinal part 1 with the shape of a prism with a base of a regular polygon, which at one end has said mounting ring raised face 2 and at the other end there is a ring raised face 3 with the inlet 4 and outlet 5 of the cooling passage 6 with a circular cross-sectional profile, which is situated inside the longitudinal part 1 of the housing and extends from the inlet 4, to the opposite end of the longitudinal part 1 along a spiral line with a fixed radius R1, then the radius is gradually reduced to R2=0.5 R1 and then along another spiral line with a fixed smaller radius R2, the cooling passage 6 returns to the side surface 7 of the ring raised face 3 ending with the outlet 5, where the total length S of the cooling passage 6 was six times the length L of the longitudinal part 1 of the housing.

2.SUP.nd .Embodiment

(14) A housing according to the second embodiment has a design similar to the housing described in the first embodiment, with the difference that its ring raised face 3 had three inlets 4 and three outlets 5 for a set of three cooling passages 6, positioned in series and concentrically to each other, which extended in the housing along a spiral line as described in the first embodiment. The total length S of the set of all three cooling passages was fifteen times greater than the length L of the longitudinal part 1 of the housing.

3.SUP.rd .Embodiment

(15) A housing according to the third embodiment has a design similar to the housing described in the second embodiment, with the difference that its ring raised face 3 had fifteen inlets 4 and fifteen outlets 5 for a system of five sets of three cooling passages 6, described in the embodiment, with each of these five sets of three cooling passages 6 being rotated with respect to the X axis of the housing by an angle of 72° in relation to the next one. The total length S of the system of all five sets of three cooling passages was seventy-five times greater than the length L of the longitudinal part 1 of the housing.

4.SUP.th .Embodiment

(16) A housing according to the fourth embodiment has a design similar to the one described in the first embodiment with the difference that its cooling passage 6 was replaced by a cooling passage with a longitudinal rectangular section along its entire length.

5.SUP.th .Embodiment

(17) A housing according to the fifth embodiment has a design similar to that of the housing described in the fourth embodiment with the difference that its ring raised face 3 had four inlets 4 and four outlets 5 for a system of four cooling passages 6, each of these four units of a cooling passage 6 was rotated with respect to the axis X of the housing by 90° in relation to the next one.

(18) All the examples described above had passages 6 with equal, constant cross-sectional profile over their entire length. It is obvious that the passages described in examples 1-5 can be replaced by passages of any profile, including triangular, square, and oval ones.

(19) In other embodiments not shown in the figures of a housing according to the invention, the spiral lines along which the individual passages extended had different pitch, and the radii R1 and R2 of variable length along the entire length L of the longitudinal part 1 of the housing, provided that the length S of a single cooling passage 6 is more than twice as long as the length L of the longitudinal part 1 of the housing.

(20) In the following embodiments, sets and systems of cooling passages 6 had different numbers of passages selected depending on the needs and external dimensions of a housing, while the air inlets 4 of the passages 6 were positioned in a conical recess 8 made on the front surface 9 of a ring raised face 3 increasing the force/velocity of the air stream entering the passages 6, while the outlets 5 were positioned on the front surface 9 of the shoulder 3.

(21) According to the invention, housings were made of metal, preferably of aluminium, with 3D printing technology.

(22) According to the invention, a housing can be used in known and previously used heads for curing of pipeline resin lining, in which compressed air or other cooling medium is fed through a flexible pipe 10 to the front surface of the head housing 9 from where, through a recess 8 and through inlets 4, it goes through a cooling passage(s) 6 flowing undisturbed along the entire housing extending over the length L, then it returns where, through outlets 5 located on the front surface 9 or the side surface 7 of a ring raised face 3 leaves the housing, enabling it to be cooled effectively by dissipating the heat generated by a set of LEDs 12 positioned on plates 13 attached to the external walls of this housing. Depending on the needs, a housing, according to the invention, may additionally have a centrally located hole 14 for power supply wires 15 of LEDs 12 or other head components.