CN215791162U

CN215791162U - High-stability steam cross-linking pipeline

Info

Publication number: CN215791162U
Application number: CN202122167068.7U
Authority: CN
Inventors: 黄月辉; 朱旻栎
Original assignee: Wuxi Huahao Electric Co ltd
Current assignee: Wuxi Huahao Electric Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-02-11
Anticipated expiration: 2031-09-07

Abstract

The utility model relates to a high-stability steam cross-linking pipeline, which comprises a pipeline body, a connecting flange connected at the front end of the pipeline body, a sealing plug connected at the tail end of the pipeline body and a heat-insulating layer wrapped outside the whole pipeline body, wherein a wire outlet hole is axially formed on the sealing plug, a steam inlet pipe communicated with the inside of the pipeline body is connected on the side wall of the front end of the pipeline body, a steam outlet pipe communicated with the inside of the pipeline body is connected on the side wall of the tail end of the pipeline body, the steam inlet pipe is connected with a high-pressure steam source, and the steam outlet pipe is connected with a steam recovery device, the pipeline body is connected with a pressure sensor inserted into the pipeline body, the steam inlet pipe is provided with a steam inlet flow valve, the steam outlet pipe is provided with a steam outlet flow valve, the pressure sensor, the steam inlet flow valve and the steam outlet flow valve are respectively connected to the same programmable controller, the programmable controller controls the steam inlet flow valve and the steam outlet flow valve by comparing the pressure values detected by the pressure sensors.

Description

High-stability steam cross-linking pipeline

Technical Field

The utility model relates to a high-stability steam crosslinking pipeline.

Background

When the wire and cable are made of insulating material based on ethylene-propylene mixture, a small amount of peroxide (DCP crosslinking agent for short) and anti-aging agent are usually added, and linear or slightly branched macromolecules are converted into a three-dimensional network structure by means of a crosslinking method using steam as a heating and pressurizing medium, so that the properties of the insulating material, such as strength, heat resistance, wear resistance, solvent resistance and the like, are improved.

The steam crosslinking process is usually carried out in a steam crosslinking pipeline, the existing steam crosslinking pipeline has no low-pressure alarm device, operators do not monitor the steam pressure in the pipeline in time, and the continuously produced wire and cable insulating material cannot be improved in performance due to insufficient crosslinking reaction, so that energy is wasted and products are scrapped.

At the same time, the steam pressure in the steam crosslinking conduit also fluctuates during the crosslinking process, and such fluctuations also affect the properties of the insulation of the wire and cable to differ over its continuous length.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the utility model provides a high stability steam crosslinked pipeline, this steam crosslinked pipeline can real time monitoring pipeline steam vapour pressure and carry out timely intervention, makes pipeline steam vapour pressure tend to stabilize, reduces fluctuation range, improves wire and cable insulating material's crosslinking effect stability.

In order to solve the technical problems, the utility model adopts the technical scheme that: a high-stability steam cross-linking pipeline comprises a pipeline body, a connecting flange connected at the front end of the pipeline body, a sealing plug connected at the tail end of the pipeline body and a heat-insulating layer wrapping the whole pipeline body, wherein a wire outlet hole is axially formed on the sealing plug, a steam inlet pipe communicated with the inside of the pipeline body is connected on the side wall of the front end of the pipeline body, a steam outlet pipe communicated with the inside of the pipeline body is connected on the side wall of the tail end of the pipeline body, the steam inlet pipe is connected with a high-pressure steam source, and the steam outlet pipe is connected with a steam recovery device, the pipeline body is connected with a pressure sensor inserted into the pipeline body, the steam inlet pipe is provided with a steam inlet flow valve, the steam outlet pipe is provided with a steam outlet flow valve, the pressure sensor, the steam inlet flow valve and the steam outlet flow valve are respectively connected to the same programmable controller, the programmable controller controls the steam inlet flow valve and the steam outlet flow valve by comparing the pressure values detected by the pressure sensors.

As a preferred scheme, the controller is also connected with an alarm, and the controller controls the alarm to work.

Preferably, the controller is connected with a driving circuit of the cable extruder through a relay to control the opening and closing of the driving circuit.

As a preferred scheme, an annular groove extending in the circumferential direction is formed in the inner wall of the wire outlet hole in the sealing plug, supporting ribs extending in the axial direction of the sealing plug are uniformly distributed in the groove in the circumferential direction, and the top surface of each supporting rib is flush with the inner wall of the wire outlet hole.

Preferably, the steam source comprises a high-pressure steam storage tank, a steam boiler communicated with the high-pressure steam storage tank through a compression pipeline, and a compressor connected to the compression pipeline, the steam recovery device comprises a pressure reduction tank and a steam return pipeline communicated with the pressure reduction tank and the steam boiler, and the steam outlet pipe is communicated with the bottom of the pressure reduction tank.

The utility model has the beneficial effects that: according to the utility model, the pressure sensor is arranged on the pipeline body to detect the steam pressure in the pipeline body, and the controller is used for controlling the flow rates of the steam inlet flow valve and the steam outlet flow valve, so that the steam inlet flow rate and the steam outlet flow rate of the steam are adjusted according to the steam pressure in the pipeline body, the pressure of the steam in the pipeline body is adjusted to maintain the steam in a stable state, the fluctuation range is reduced, the stability of the crosslinking effect of the wire and cable insulating material is improved, and the stability of the steam crosslinking pipeline is improved.

Drawings

The following detailed description of embodiments of the utility model is provided in conjunction with the appended drawings, in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an electrical control schematic of the present invention;

FIG. 3 is a schematic view of a half-section of the closure of the present invention;

in FIGS. 1 to 3: 1. the device comprises a pipeline body, 2, a connecting flange, 3, a sealing plug, 4, an insulating layer, 5, an outlet hole 6, an inlet pipe, 7, an outlet pipe, 8, a steam source, 801, a high-pressure steam storage tank, 802, a compression pipeline, 803, a steam boiler, 804, a compressor, 9, a steam recovery device, 901, a pressure reduction tank, 902, a steam return pipeline, 10, a pressure sensor, 11, an inlet flow valve, 12, an outlet flow valve, 13, a controller, 14, an alarm, 15, a relay, 16, a driving circuit, 17, a groove, 18, a supporting rib, 19, an extruder head, 20 and a cable.

Detailed Description

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The high-stability steam cross-linking pipeline as shown in fig. 1 to 3 comprises a pipeline body 1, a connecting flange 2 connected to the front end of the pipeline body 1, a sealing plug 3 connected to the tail end of the pipeline body and a heat insulating layer 4 wrapping the whole pipeline body 1, wherein a wire outlet 5 is axially arranged on the sealing plug 3, a steam inlet pipe 6 communicated with the inside of the pipeline body 1 is connected to the side wall of the front end of the pipeline body 1, a steam outlet pipe 7 communicated with the inside of the pipeline body 1 is connected to the side wall of the tail end of the pipeline body 1, the steam inlet pipe 6 is connected to a high-pressure steam source 8, the steam outlet pipe 7 is connected to a steam recovery device 9, a pressure sensor 10 inserted into the pipeline body 1 is connected to the pipeline body 1, a steam inlet flow valve 11 is arranged on the steam inlet pipe 6, a steam outlet flow valve 12 is arranged on the steam outlet pipe 7, the pressure sensor 10, the steam inlet flow valve 11 and the steam outlet flow valve 12 are respectively connected to a same programmable controller 13, the programmable controller 13 controls the steam inlet flow valve 11 and the steam outlet flow valve 12 by comparing the pressure values detected by the pressure sensor 10.

In order to improve warning function, avoid pipeline body 1 internal steam pressure too reduce and can't resume balanced state, still be connected with alarm 14 on the controller 13, alarm 14 work is controlled according to the minimum steam pressure value of predetermineeing to controller 13.

The controller 13 is connected to a drive circuit 16 of the cable extruder through a relay 15 to control the on/off of the drive circuit 16, and when the steam pressure in the pipe body 1 decreases to a certain set value, the controller 13 cuts off the drive circuit 16 of the extruder through the relay 15, thereby stopping the cable extruder.

In this embodiment, an annular groove 17 extending in the circumferential direction is formed in the inner wall of the outlet hole 5 of the closing plug 3, support ribs 18 extending in the axial direction of the closing plug 3 are uniformly distributed in the groove 17 in the circumferential direction, and the top surfaces of the support ribs 18 are flush with the inner wall of the outlet hole 5. After the groove 17 is arranged, the contact area between the outer surface of the cable and the wire outlet hole 5 is greatly reduced, so that the friction force between the cable and the closing plug 3 is reduced, the power for pulling the cable is reduced, and the energy is saved.

The steam source 8 in this embodiment includes a high pressure steam storage tank 801, a steam boiler 803 communicated with the high pressure steam storage tank 801 through a compression pipe 802, and a compressor 804 connected to the compression pipe 802, the steam recovery device 9 includes a pressure reducing tank 901, a steam return pipe 902 communicating the pressure reducing tank 901 with the steam boiler 803, and the steam outlet pipe 7 is communicated with the bottom of the pressure reducing tank 901. The depressurization tank 901 has a large space, and the high-pressure steam enters the depressurization tank 901 and then rapidly expands and depressurizes to a pressure slightly higher than the steam pressure in the steam boiler 803, and then flows back into the steam boiler 803 to be heated again for recycling.

The working process of the utility model is as follows: as shown in fig. 1 to fig. 3, the pipe body 1 is hermetically connected with an extruder head 19 through a connecting flange 2 at the front end, the extruder head 19 extrudes and wraps the wires to form a cable 20 with an insulating layer on the outer surface, the cable 20 passes through the pipe body 1 and then passes through a wire outlet 5 to be led out of the pipe body 1, the cable 20 penetrating out of the pipe body 1 is pulled by a traction mechanism to be wound, and the cable 20 is catalyzed by high-temperature high-pressure steam in the pipe body 1 to perform a crosslinking reaction, so that the strength, heat resistance, wear resistance, solvent resistance and other properties of the insulating layer are improved.

In the cross-linking process of the cable 20, the steam boiler 803 heats water to generate steam, the steam is compressed by the compressor 804 to form high-pressure steam and is stored in the high-pressure steam storage tank 801, the controller 13 adjusts the flow rates of the steam inlet flow valve 11 and the steam outlet flow valve according to the steam pressure in the pipeline body 1 detected by the pressure sensor 10, assuming that the steam pressure value in the pipeline body 1 is preset to be 1.4Mpa and the minimum value is 1.2Mpa, when the pressure sensor 10 detects that the pressure in the pipeline body 1 is reduced to 1.3Mpa, the controller 13 adjusts the steam inlet flow valve 11 to be large, accelerates the steam inlet and simultaneously adjusts the steam outlet flow valve 12 to reduce the steam outlet, thereby quickly adjusting the steam pressure in the pipeline body 1 to restore the pressure to 1.4Mpa, and when the pressure exceeds 1.4Mpa, the steam pressure is reversely controlled to reduce the steam pressure.

When the regulation fails and the steam pressure is reduced to 1.2Mpa, the controller 13 controls the alarm 14 to give an alarm, and if the preset pressure lowest value is also the shutdown preset value, the controller 13 also controls the relay 15 to be disconnected at the same time, so that the cable extruder is shut down.

Through the real-time monitoring and control of the steam pressure in the pipeline body 1, the steam pressure in the pipeline body 1 tends to be stable, the fluctuation range is reduced, and the stability of the crosslinking effect of the wire and cable insulating material is improved

The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the utility model; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. High stability steam crosslinked pipeline, including pipeline body (1), connect flange (2) at pipeline body (1) front end, connect in the seal stopper (3) of pipeline body tail end and wrap up in whole pipeline body (1) outside heat preservation (4), wire hole (5) have been seted up axially on seal stopper (3), be connected with steam inlet pipe (6) rather than inside intercommunication on the pipeline body (1) front end lateral wall, be connected with steam outlet pipe (7) rather than inside intercommunication on pipeline body (1) tail end lateral wall, steam inlet pipe (6) are connected with high pressure steam source (8), steam outlet pipe (7) are connected with steam recovery unit (9), its characterized in that, be connected with a pressure sensor (10) that inserts in pipeline body (1) on pipeline body (1), be provided with steam inlet flow valve (11) on steam inlet pipe (6), the steam outlet pipe (7) is provided with a steam outlet flow valve (12), the pressure sensor (10), the steam inlet flow valve (11) and the steam outlet flow valve (12) are respectively connected to the same programmable controller (13), and the programmable controller (13) controls the steam inlet flow valve (11) and the steam outlet flow valve (12) by comparing pressure values detected by the pressure sensor (10).

2. The high-stability steam crosslinking pipeline according to claim 1, wherein an alarm (14) is further connected to the controller (13), and the controller (13) controls the alarm (14) to operate.

3. The high stability steam crosslinking duct of claim 1, wherein the controller (13) is connected to the drive circuit (16) of the cable extruder via a relay (15) to control the opening and closing of the drive circuit (16).

4. The high-stability steam crosslinking pipeline as claimed in claim 1, wherein the inner wall of the outlet hole (5) of the closing plug (3) is provided with a circumferentially extending annular groove (17), support ribs (18) axially extending along the closing plug (3) are uniformly distributed in the groove (17) in the circumferential direction, and the top surfaces of the support ribs (18) are flush with the inner wall of the outlet hole (5).

5. The high stability steam crosslinking conduit according to claim 1, wherein the steam source (8) comprises a high pressure steam storage tank (801), a steam boiler (803) communicated with the high pressure steam storage tank (801) through a compression conduit (802), and a compressor (804) connected to the compression conduit (802), the steam recovery device (9) comprises a pressure reduction tank (901), a steam return conduit (902) communicated with the pressure reduction tank (901) and the steam boiler (803), and the steam outlet pipe (7) is communicated with the bottom of the pressure reduction tank (901).