Crosslinking by-product isolation device, crosslinking pipeline assembly and VCV crosslinking production line

Abstract

The invention relates to a crosslinking by-product isolation device, a crosslinking pipeline assembly and a VCV crosslinking production line, the crosslinking by-product isolation device comprises a connecting mechanism, a first wire core pipeline, a second wire core pipeline and a cooling gas pipeline, a connecting cavity is provided with a first cavity opening, a second cavity opening and a third cavity opening, the first wire core pipeline is connected with the first cavity opening, and the second wire core pipeline is connected with the third cavity opening. A pipe cavity of the first wire core pipeline is communicated with the connection cavity, the second wire core pipeline and the first wire core pipeline are coaxially arranged, the second wire core pipeline is connected with an opening of the second cavity, a pipe cavity of the second wire core pipeline is communicated with the connection cavity, the second wire core pipeline is provided with an inner pipe section extending into the connection cavity, and an opening of the third cavity faces the outer side wall of the inner pipe section. The cooling gas pipeline is connected with the opening of the third cavity, and a pipe cavity of the cooling gas pipeline is communicated with the connecting cavity. Cooling gas can be prevented from being in direct contact with the surface of the cable core, and a crosslinking by-product is isolated from the cable core, so that the appearance quality of the cable core is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cable production, and in particular to a cross-linking byproduct isolation device, a cross-linking pipeline component and a VCV cross-linking production line. Background Art

[0002] In the production of high-voltage and ultra-high-voltage cross-linked polyethylene cables, the production of cross-linked cores is a very important process. The cable insulation core is cross-linked through a cross-linked pipeline. The cross-linked pipeline consists of three parts: a heating pipeline, a pre-cooling pipeline, and a cooling gas pipeline. Half of the pre-cooling pipeline is filled with cooling gas with a certain pressure. The cooling gas mainly plays a cooling role. The high-pressure cooling gas is to prevent the formation of large bubbles and excessive moisture in the cross-linked body. The cooling gas is mainly used as a heat transfer medium to protect the polyethylene from oxidative degradation in the pipe, exert pressure on the insulation, and reduce the air gap. The flowing cooling gas takes away a large amount of water vapor generated by the volatilization of cooling water and the moisture decomposed by the peroxide in the cross-linking reaction. Since the cross-linking reaction in the cross-linked pipeline will produce certain by-products, and the cooling gas that plays a cooling role is recycled, the cooling gas may carry by-products. As the circulating cooling gas enters the cross-linked pipeline to cool the core, the cross-linked by-products will also adhere to the surface of the core, causing stains on the surface of the core and affecting the appearance quality of the product. How to prevent the cross-linked by-products from adhering to the surface of the core is a technical problem that needs to be solved in this field. Summary of the invention

[0003] To this end, the present invention provides a cross-linking byproduct isolation device, a cross-linking pipeline component and a VCV cross-linking production line for preventing the cooling gas from directly contacting the wire core surface when the cooling gas enters the cross-linking pipeline.

[0004] In order to solve the above technical problems, the present invention provides a cross-linking byproduct isolation device, comprising a handover mechanism, a first wire core pipeline, a second wire core pipeline and a cooling gas pipeline; The connecting mechanism is used to transitionally connect the first wire core pipe, the second wire core pipe and the cooling gas pipe, and the connecting mechanism has a connecting cavity, and the connecting cavity has a first cavity opening, a second cavity opening and a third cavity opening; The first wire core pipe is used for allowing the wire core to enter the junction cavity, the first wire core pipe is connected to the first cavity opening, and the lumen of the first wire core pipe is in communication with the junction cavity; The second wire core pipe is used for allowing the wire core to leave the junction cavity, the second wire core pipe is coaxially arranged with the first wire core pipe, the second wire core pipe is connected to the opening of the second cavity, the lumen of the second wire core pipe is connected to the junction cavity, the second wire core pipe has an inner pipe section extending into the interior of the junction cavity, and the third cavity opening faces the outer side wall of the inner pipe section; The cooling gas pipeline is used to transport cooling gas to the interfacing cavity. The cooling gas pipeline is connected to the opening of the third cavity. The lumen of the cooling gas pipeline is in communication with the interfacing cavity.

[0005] Furthermore, the distance between the opening of the third cavity and the outer side wall of the inner tube section is 50-60 mm.

[0006] Furthermore, the inner tube section has an inner tube opening facing the first cavity, and the distance between the third cavity opening and the inner tube opening is 300-400 mm.

[0007] Furthermore, the handover mechanism is a handover pipe, and the handover pipe, the first wire core pipe and the second wire core pipe are coaxially arranged.

[0008] Furthermore, the connecting pipe includes a first connecting pipe section, a second connecting pipe section and a third connecting pipe section, the first connecting pipe section is a straight pipe, the second connecting pipe section and the third connecting pipe section are both tapered pipes, the large pipe openings of the second connecting pipe section and the third connecting pipe section are respectively connected to the two pipe openings of the first connecting pipe section, and the small pipe openings of the second connecting pipe section and the third connecting pipe section are respectively connected to the outer walls of the first wire core pipe and the second wire core pipe.

[0009] Furthermore, an angle between a longitudinal axis of the cooling gas pipe and a longitudinal axis of the second wire core pipe is 45-90 degrees.

[0010] Further, the third cavity opening and the cooling gas pipeline are both provided in plurality, and the plurality of cooling gas pipelines are respectively connected to the plurality of third cavity openings.

[0011] Furthermore, the first core pipe is provided with a first flange at its pipe opening away from the handover mechanism, the second core pipe is provided with a second flange at its pipe opening away from the handover mechanism, and the cooling gas pipe is provided with a third flange at its pipe opening away from the handover mechanism.

[0012] The present invention also provides a cross-linked pipeline assembly, comprising a plurality of cross-linked pipelines connected in series and at least one cross-linked byproduct isolation device, wherein the cross-linked byproduct isolation device is connected between two cross-linked pipelines.

[0013] The present invention also provides a VCV cross-linking production line, comprising the cross-linking pipeline assembly.

[0014] The above-mentioned technical scheme of the present invention has the following advantages over the prior art: in the cross-linked by-product isolation device, cross-linked pipe assembly and VCV cross-linking production line described in the present invention, when the cooling gas enters the cross-linked by-product isolation device, the cooling gas will first contact the outer wall of the second wire core pipe, and the cross-linked by-products carried in the cooling gas will adhere to the outer wall of the second wire core pipe, avoiding direct contact between the cooling gas and the wire core surface, isolating the cross-linked by-products from the wire core, thereby improving the appearance quality of the wire core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of the cross-linking by-product isolation device in the present invention; Figure 2 It is a working schematic diagram of the cross-linking by-product isolation device in the present invention.

[0017] Explanation of the reference numerals in the specification: 1. Cross-linking mechanism; 11. Handover cavity; 12. First handover tube section; 13. Second handover tube section; 14. Third handover tube section; 2. First wire core pipe; 21. First flange; 3. Second wire core pipe; 31. Inner pipe section; 32. Second flange; 4. Cooling gas pipe; 41. Third flange; 5. Wire core. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Embodiment 1

[0019] See also Figure 1 and Figure 2 As shown, one embodiment of the cross-linking byproduct isolation device provided by the present invention.

[0020] The above-mentioned cross-linking byproduct isolation device comprises a handover mechanism, a first wire core pipeline 2, a second wire core pipeline 3 and a cooling gas pipeline 4; The above-mentioned handover mechanism is used for transitionally connecting the above-mentioned first wire core pipe 2, the above-mentioned second wire core pipe 3 and the above-mentioned cooling gas pipe 4, and the above-mentioned handover mechanism has a handover cavity 11, and the above-mentioned handover cavity 11 has a first cavity opening, a second cavity opening and a third cavity opening; The first wire core pipe 2 is used for supplying the wire core to enter the above-mentioned junction cavity 11. The first wire core pipe 2 is connected to the above-mentioned first cavity opening, and the lumen of the first wire core pipe 2 is in communication with the above-mentioned junction cavity 11. The second wire core pipe 3 is used for allowing the wire core to leave the above-mentioned intersection cavity 11. The second wire core pipe 3 is coaxially arranged with the first wire core pipe 2. The second wire core pipe 3 is connected to the opening of the second cavity. The lumen of the second wire core pipe 3 is communicated with the above-mentioned intersection cavity 11. The second wire core pipe 3 has an inner pipe section 31 extending into the interior of the above-mentioned intersection cavity 11. The third cavity opening faces the outer side wall of the inner pipe section 31. The cooling gas pipeline 4 is used to transport the cooling gas to the connecting cavity 11 . The cooling gas pipeline 4 is connected to the opening of the third cavity. The lumen of the cooling gas pipeline 4 is in communication with the connecting cavity 11 .

[0021] The above-mentioned handover mechanism is actually a shell that encloses the above-mentioned handover cavity 11. The connection between the first wire core pipe 2 and the first cavity opening is sealed, the connection between the second wire core pipe 3 and the second cavity opening is sealed, and the connection between the cooling gas pipe 4 and the third cavity opening is sealed. Specifically in this embodiment, the first wire core pipe 2 is welded to the first cavity opening, the second wire core pipe 3 is welded to the second cavity opening, and the cooling gas pipe 4 is welded to the third cavity opening. The opposite pipe openings of the above-mentioned first wire core pipe 2 and the above-mentioned second wire core pipe 3 are spaced a certain distance apart, and the pipe opening of the cooling gas pipe 4 facing the inside of the above-mentioned handover cavity 11 is spaced a certain distance from the outer wall of the first wire core pipe 2. The cooling gas pipe 4 can cross with the second wire core pipe 3 after being extended.

[0022] The wire core 5 passes through the above-mentioned cross-linking by-product isolation device during cross-linking. When the cooling gas (such as nitrogen) enters the cross-linking by-product isolation device, the cooling gas will first contact the outer wall of the second wire core pipe 3. The cross-linking by-products carried in the cooling gas adhere to the outer wall of the second wire core pipe 3, avoiding direct contact between the cooling gas and the wire core surface, isolating the cross-linking by-products from the wire core, thereby improving the appearance quality of the wire core.

[0023] In this embodiment, the distance between the opening of the third cavity and the outer side wall of the inner tube section 31 is 50-60 mm.

[0024] An annular space is formed between the shell of the junction mechanism and the inner tube section 31. The cooling gas enters the annular space from the third cavity opening and contacts the outer wall of the inner tube section 31 before continuing to diffuse. The distance between the third cavity opening and the outer wall of the inner tube section 31 cannot be too large. If it is too large, the cooling gas will not contact the outer wall of the inner tube section 31, but will directly diffuse out, and the volume of the cross-linked byproduct isolation device will be large. The distance between the third cavity opening and the outer wall of the inner tube section 31 cannot be too small. If it is too small, it will affect the flow of the cooling gas entering the junction cavity 11 and the cooling effect. The distance between the third cavity opening and the outer wall of the inner tube section 31 is 50-60 mm, which can ensure that the cooling gas contacts the outer wall of the inner tube section 31 and does not affect the flow of the cooling gas entering the junction cavity 11. Specifically in this embodiment, the distance between the opening of the third cavity and the outer wall of the inner tube section 31 is 50 mm, 51 mm, 52 mm, 53 mm, 54 mm, 55 mm, 56 mm, 57 mm, 58 mm, 59 mm or 60 mm.

[0025] In this embodiment, the inner tube section 31 has an inner tube opening facing the first cavity, and the distance between the third cavity opening and the inner tube opening is 300-400 mm.

[0026] The distance between the third cavity opening and the inner tube orifice cannot be too small, otherwise the cooling gas will not be in sufficient contact with the outer wall of the inner tube section 31. The distance between the third cavity opening and the inner tube orifice cannot be too large, otherwise the cross-linked byproduct isolation device will be larger in size. Specifically in this embodiment, the distance between the third cavity opening and the inner tube orifice is 300 mm, 310 mm, 320 mm, 330 mm, 340 mm, 350 mm, 360 mm, 370 mm, 380 mm, 390 mm or 400 mm.

[0027] In this embodiment, the handover mechanism is a handover pipe, and the handover pipe, the first wire core pipe 2 and the second wire core pipe 3 are coaxially arranged.

[0028] The above-mentioned handover pipe, the above-mentioned first core pipe 2 and the above-mentioned second core pipe 3 are coaxially arranged, and their coaxial axis is the central axis of the cross-linked by-product isolation device. The core passes through the center of the cross-linked by-product isolation device, and the structure of the entire cross-linked by-product isolation device is more compact.

[0029] In other embodiments, the above-mentioned connection mechanism may be in the shape of a box instead of a pipe, or the connection pipe is not coaxially arranged with the first wire core pipe and the second wire core pipe.

[0030] In this embodiment, the above-mentioned connecting pipe includes a first connecting pipe section 12, a second connecting pipe section 13 and a third connecting pipe section 14. The above-mentioned first connecting pipe section 12 is a straight pipe, and the above-mentioned second connecting pipe section 13 and the above-mentioned third connecting pipe section 14 are both tapered pipes. The large pipe openings of the above-mentioned second connecting pipe section 13 and the above-mentioned third connecting pipe section 14 are respectively connected to the two pipe openings of the above-mentioned first connecting pipe section 12, and the small pipe openings of the above-mentioned second connecting pipe section 13 and the above-mentioned third connecting pipe section 14 are respectively connected to the outer walls of the above-mentioned first core pipe 2 and the above-mentioned second core pipe 3.

[0031] The two ends of the above-mentioned intersection pipe gradually shrink, similar to a spindle shape. The side wall of the first intersection pipe section 12 is provided with the above-mentioned third cavity opening, the small pipe opening of the above-mentioned second intersection pipe section 13 is the above-mentioned first cavity opening, and the small pipe opening of the above-mentioned third intersection pipe section 14 is the above-mentioned second cavity opening. In other embodiments, it can also be that the above-mentioned second intersection pipe section and the third intersection pipe section are set as annular sealing plates.

[0032] In this embodiment, the included angle between the longitudinal axis of the cooling gas pipe 4 and the longitudinal axis of the second wire core pipe 3 is 45-90 degrees.

[0033] The cooling gas pipe 4 guides the cooling gas into the junction cavity, so the direction of the longitudinal axis of the cooling gas pipe 4 determines the direction in which the cooling gas enters the junction cavity, and the angle between the longitudinal axis of the cooling gas pipe 4 and the longitudinal axis of the second wire core pipe 3 needs to be within a suitable range to ensure that the cooling gas contacts the outer wall of the inner pipe section 31 after entering the junction cavity 11. Specifically in this embodiment, the angle between the longitudinal axis of the cooling gas pipe 4 and the longitudinal axis of the second wire core pipe 3 is 90 degrees, and they are perpendicular to each other.

[0034] In other embodiments, the angle between the longitudinal axis of the cooling gas pipe 4 and the longitudinal axis of the second core pipe 2 may be 45 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees or 85 degrees.

[0035] In this embodiment, the third cavity opening and the cooling gas pipeline 4 are both provided in plurality, and the plurality of cooling gas pipelines 4 are respectively connected to the plurality of third cavity openings.

[0036] In order to ensure that the cooling gas enters the junction cavity 11 uniformly, a plurality of third cavity openings are provided in the junction cavity 11. Specifically in this embodiment, the junction cavity 11 is provided with two third cavity openings, which are arranged 180 degrees apart, and the two cooling gas pipes 4 are located on the same straight line and on both sides of the inner pipe section 31 respectively.

[0037] In this embodiment, the first wire core pipe 2 is provided with a first flange 21 at its pipe opening away from the handover mechanism, the second wire core pipe 3 is provided with a second flange 32 at its pipe opening away from the handover mechanism, and the cooling gas pipe 4 is provided with a third flange 41 at its pipe opening away from the handover mechanism.

[0038] The first flange 21 and the second flange 32 connect the cross-linked gas isolation device to the cross-linked pipeline, and the third flange 41 connects the cooling gas pipeline 4 to the cooling gas supply pipeline. It is convenient to disassemble and assemble, and can directly replace the installed single-section cross-linked pipeline.

[0039] A cross-linked pipeline assembly is introduced below, comprising a plurality of cross-linked pipelines connected in series and at least one of the above-mentioned cross-linked byproduct isolation devices, wherein the above-mentioned cross-linked byproduct isolation device is connected between two of the above-mentioned cross-linked pipelines.

[0040] The multiple cross-linked pipes are connected in series, which means that the pipe openings of the interconnected cross-linked pipes are sealed and connected, and the cross-linked byproduct isolation device is connected in series between two cross-linked pipes. The pipe opening of the first wire core pipe is away from the handover mechanism and is sealed and connected to one cross-linked pipe, and the pipe opening of the second wire core pipe is away from the handover mechanism and is sealed and connected to another cross-linked pipe. The cooling gas enters the cross-linked pipe through the cross-linked byproduct isolation device to cool the wire core in the cross-linked pipe.

[0041] A VCV cross-linking production line is introduced below, including the above-mentioned cross-linking pipeline assembly.

[0042] ‌VCV cross-linking production line, full name vertical cross-linking production line, is a kind of equipment used to produce cables. ‌ This production line is mainly used for the insulation process of cross-linking high-voltage polyethylene insulated wires and cables. ‌ VCV cross-linking production process is a technical process of cross-linking high-voltage polyethylene insulated wires and cables. Through this process, the insulation performance of the cable is significantly improved, thereby enhancing the heat resistance, chemical stability and mechanical strength of the cable. ‌

[0043] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A cross-linking byproduct isolation device, characterized in that: It includes a handover mechanism, a first wire core pipeline, a second wire core pipeline and a cooling gas pipeline; The connecting mechanism is used to transitionally connect the first wire core pipe, the second wire core pipe and the cooling gas pipe, and the connecting mechanism has a connecting cavity, and the connecting cavity has a first cavity opening, a second cavity opening and a third cavity opening; The first wire core pipe is used for allowing the wire core to enter the junction cavity, the first wire core pipe is connected to the first cavity opening, and the lumen of the first wire core pipe is in communication with the junction cavity; The second wire core pipe is used for allowing the wire core to leave the junction cavity, the second wire core pipe is coaxially arranged with the first wire core pipe, the second wire core pipe is connected to the opening of the second cavity, the lumen of the second wire core pipe is connected to the junction cavity, the second wire core pipe has an inner pipe section extending into the interior of the junction cavity, and the third cavity opening faces the outer side wall of the inner pipe section; The cooling gas pipeline is used to transport cooling gas to the interfacing cavity. The cooling gas pipeline is connected to the opening of the third cavity. The lumen of the cooling gas pipeline is in communication with the interfacing cavity.

2. The cross-linking byproduct isolation device according to claim 1, characterized in that: The distance between the opening of the third cavity and the outer side wall of the inner tube section is 50-60 mm.

3. The cross-linking byproduct isolation device according to claim 1, characterized in that: The inner tube section has an inner tube opening facing the first cavity, and the distance between the third cavity opening and the inner tube opening is 300-400 mm.

4. The cross-linking byproduct isolation device according to claim 1, characterized in that: The handover mechanism is a handover pipe, and the handover pipe, the first wire core pipe and the second wire core pipe are coaxially arranged.

5. The cross-linking byproduct isolation device according to claim 4, characterized in that: The connecting pipe includes a first connecting pipe section, a second connecting pipe section and a third connecting pipe section, the first connecting pipe section is a straight pipe, the second connecting pipe section and the third connecting pipe section are both tapered pipes, the large pipe openings of the second connecting pipe section and the third connecting pipe section are respectively connected to the two pipe openings of the first connecting pipe section, and the small pipe openings of the second connecting pipe section and the third connecting pipe section are respectively connected to the outer side walls of the first wire core pipe and the second wire core pipe.

6. The cross-linking byproduct isolation device according to claim 1, characterized in that: The included angle between the longitudinal axis of the cooling gas pipeline and the longitudinal axis of the second wire core pipeline is 45-90 degrees.

7. The cross-linking byproduct isolation device according to claim 1, characterized in that: The third cavity opening and the cooling gas pipeline are both provided in plurality, and the plurality of cooling gas pipelines are respectively connected to the plurality of third cavity openings.

8. The cross-linking byproduct isolation device according to claim 1, characterized in that: The first core pipe is provided with a first flange at its pipe opening away from the handover mechanism, the second core pipe is provided with a second flange at its pipe opening away from the handover mechanism, and the cooling gas pipe is provided with a third flange at its pipe opening away from the handover mechanism.

9. A cross-linked pipe assembly, characterized in that: The invention comprises a plurality of cross-linked pipelines connected in series and at least one cross-linked byproduct isolation device according to any one of claims 1 to 8, wherein the cross-linked byproduct isolation device is connected between two of the cross-linked pipelines.

10. A VCV cross-linking production line, characterized in that: The cross-linked pipe assembly comprises the cross-linked pipe assembly according to claim 9.

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