CN116959818A - Water-gas balance system - Google Patents
Water-gas balance system Download PDFInfo
- Publication number
- CN116959818A CN116959818A CN202311021775.2A CN202311021775A CN116959818A CN 116959818 A CN116959818 A CN 116959818A CN 202311021775 A CN202311021775 A CN 202311021775A CN 116959818 A CN116959818 A CN 116959818A
- Authority
- CN
- China
- Prior art keywords
- water
- pipe
- balance system
- cross
- linking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 105
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000004132 cross linking Methods 0.000 claims abstract description 43
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 34
- 239000000498 cooling water Substances 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims description 6
- 210000003437 trachea Anatomy 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 30
- 239000007789 gas Substances 0.000 abstract description 22
- 238000001816 cooling Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Pipeline Systems (AREA)
Abstract
The invention relates to the technical field of cable manufacture and discloses a water-gas balance system which comprises a cross-linking pipe, wherein a hot nitrogen area, a buffer pipe section and a water cooling pipe section are sequentially arranged in the cross-linking pipe, the water-gas balance system further comprises a cooling water tank, a water inlet pipe for connecting the cooling water tank with the water cooling pipe section, a water pump arranged on the water inlet pipe, a first water outlet pipe for connecting the water cooling pipe section or the buffer pipe section, a tank body, a PLC (programmable logic controller) and a gas pipe, the first water outlet pipe is communicated with the interior of the tank body, the gas pipe is communicated with the upper end of the interior of the tank body, a liquid level meter is arranged in the tank body, the bottom of the tank body is connected with a second water outlet pipe, a pressure relief valve is arranged on the second water outlet pipe, and the water pump, the liquid level meter and the pressure relief valve are all connected with the PLC. The invention has the following advantages and effects: the invention achieves the effects of automatic control of water-gas balance, reduced workload of staff, manual control function, reliable water-gas balance control and high degree of automation.
Description
Technical Field
The invention relates to the technical field of cable manufacturing, in particular to a water-gas balance system.
Background
The three-layer co-extrusion drying crosslinked cable production line comprises a paying-off station, a wire storage station, an upper traction station, a machine head, an insulating extruder, a crosslinked pipe, a wire twisting machine, a lower traction station and the like, and is used for automatically producing insulated cables. The main structure of the cross-linking pipe comprises a cross-linking heating pipe, a suspension controller and the like, wherein a hot nitrogen area and a water cooling area are arranged in a pipeline, and the balance state of nitrogen and water needs to be controlled in the production process.
The chinese application publication No. CN114242348A discloses an insulation extrusion preparation method of a polypropylene insulation medium voltage power cable, in which a water vapor balancing device is mentioned, but specific components and principles of the device are not disclosed. The Chinese patent publication No. CN100362601C discloses a production line of two-step multi-line continuous chemical crosslinking wires and cables, which comprises a special water-gas balancing device, but does not disclose the specific structure and principle of the special water-gas balancing device.
In view of this, the present invention provides a water vapor balancing system.
Disclosure of Invention
The invention aims to provide a water-gas balance system which has the effect of controlling water-gas balance.
The technical aim of the invention is realized by the following technical scheme: the utility model provides a water vapor balance system, includes the crosslinked pipe, include hot nitrogen district, buffer tube section, water-cooled tube section in proper order in the crosslinked pipe, still include the cooling water pond, connect the cooling water pond with the inlet tube of water-cooled tube section, install in water pump on the inlet tube, connect the water-cooled tube section or the first drain pipe, jar body, PLC of buffer tube section, connection hot nitrogen district or buffer tube section's trachea, first drain pipe with jar internal portion is linked together, the trachea with jar internal portion upper end is linked together, install the level gauge in the jar body, jar body bottom is connected with the second drain pipe, the relief valve is installed to the second drain pipe, the water pump the level gauge the relief valve is all connected PLC.
By adopting the technical scheme, the hot nitrogen area is filled with nitrogen, the water cooling pipe section is filled with cooling water, and the nitrogen and the water are in contact and balance in the buffer pipe section. Simultaneously, nitrogen in the cross-linking pipe enters into the upper end inside the tank body, water in the cross-linking pipe flows into the lower end inside the tank body, the nitrogen and the water are balanced in the tank body, the liquid level meter detects the liquid level and transmits signals to the PLC, and the upper limit and the lower limit of the liquid level are preset in the PLC.
The PLC compares the liquid level signal with the upper limit value and the lower limit value of the liquid level, if the liquid level signal is close to the upper limit value of the liquid level, the water pressure is judged to be overlarge, cooling water in the crosslinking pipe is approaching to the hot nitrogen area, the PLC controls the pressure release valve to increase the opening amplitude, the water is released, and the power of the water pump can be reduced according to the situation.
If the liquid level signal is close to the lower limit value of the liquid level, the water pressure is judged to be too small, the nitrogen in the cross-linking pipe is approaching to the water cooling pipe section, the PLC controls the pressure release valve to reduce the opening amplitude, and the power of the water pump can be increased according to the situation.
The invention is further provided with: the number of the water pumps is two and the water pumps are arranged in parallel.
Through adopting above-mentioned technical scheme, water pump quantity is two, for redundant design, when one of them water pump trouble, can start another water pump, avoids because one water pump trouble causes the production line to shut down.
The invention is further provided with: the second drain pipe is provided with a manual valve, and the manual valve and the pressure release valve are arranged in parallel.
By adopting the technical scheme, the invention also provides a manual valve, and a worker can select manual adjustment according to the situation.
The invention is further provided with: and the second drain pipe drain outlet is connected with the cooling water tank.
By adopting the technical scheme, the water discharged by the second water discharge pipe flows back to the cooling water tank, so that the water is recycled, and the water is saved.
The invention is further provided with: the novel water heater further comprises a plurality of supports, the supports are provided with guide wheels, the cross-linking pipe is arranged on the guide wheels, and the first drain pipe and the air pipe are hoses.
By adopting the technical scheme, the cross-linking pipe can slide on the guide wheel when being heated to extend or cooled to shrink. The first drain pipe and the air pipe are connected to the cross-linked pipe, and a hose is needed.
The invention is further provided with: the cross-linking pipe comprises a plurality of pipelines, and two adjacent pipelines are connected through a flange.
By adopting the technical scheme, the assembly of the production line is convenient.
The invention is further provided with: and along the advancing direction of the cable in the cross-linked pipeline, the joint of the first drain pipe and the cross-linked pipe is positioned at the upstream of the joint of the water inlet pipe and the cross-linked pipe.
Through adopting above-mentioned technical scheme, the flow direction of cooling water in the crosslinked pipe is opposite with the advancing direction of cable, makes the cable can last the lower cooling water of contact temperature, guarantees the cooling effect.
The invention is further provided with: the pressure release valve comprises a straight-travel electronic electric actuator and a valve.
The beneficial effects of the invention are as follows:
1. according to the invention, the balance condition of nitrogen and water in the cross-linking pipe is judged by judging the liquid level in the tank body, the liquid level signal is acquired by the liquid level sensor, and the PLC controls the pressure release valve and the water pump according to the liquid level signal, so that the automatic control of water-air balance is realized.
2. The invention is also provided with a manual valve, and can perform manual control while performing automatic control. When the pressure release valve fails, a worker can manually control the water-air balance according to the liquid level value acquired by the liquid level meter, so that the production line is ensured not to stop.
3. The number of the water pumps is two, and through redundant design, the production line can be ensured to normally operate even if one water pump fails.
4. The invention achieves the automatic control of water-gas balance, reduces the workload of staff and can ensure the water-gas balance effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of embodiment 1.
FIG. 2 is a schematic diagram showing the connection relationship among the crosslinking tube, the adjusting shaft, and the adjusting tube in example 2.
In the figure, 1, cross-linking the tube; 11. a hot nitrogen zone; 12. a buffer tube section; 13. a water-cooled tube section; 14. a base; 141. a locking bolt; 15. an adjusting shaft; 151. a gear; 16. a rack; 161. an adjusting tube; 162. a flexible hose; 17. a first valve; 18. a discharge pipe; 19. a second valve; 2. a cooling water tank; 3. a water inlet pipe; 31. a water pump; 4. an air pipe; 5. a tank body; 6. a first drain pipe; 7. a second drain pipe; 71. a pressure release valve; 72. a manual valve; 8. a bracket; 81. and a guide wheel.
Detailed Description
The technical scheme of the present invention will be clearly and completely described in connection with specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Example 1: a water-gas balance system, as shown in figure 1, comprises a plurality of supports, a rotatable guide wheel 81 is arranged on the support of a cross-linking tube 1, and the cross-linking tube 1 is arranged on the guide wheel 81. The cross-linking pipe 1 is composed of a plurality of pipelines, and adjacent pipelines are connected through flanges. The cross-linking tube 1 can slide on the guide wheel 81 when it is stretched by heat or contracted by cooling. The cross-linking tube 1 sequentially comprises a hot nitrogen area 11, a buffer tube section 12 and a water cooling tube section 13. The hot nitrogen zone 11 is filled with nitrogen, the water cooling pipe section 13 is provided with cold water, and the cooling water and the nitrogen are contacted in the buffer pipe section 12.
The water-gas balance system further comprises a cooling water tank 2, a water inlet pipe 3 and two water pumps 31 arranged on the water inlet pipe 3, wherein an opening at one end of the water inlet pipe 3 is positioned in the cooling water tank 2, and the other end of the water inlet pipe is communicated in the water cooling pipe section 13. The water pump 31 can send the cooling water in the cooling water tank 2 into the water cooling pipe section 13 when operating. Two water pumps 31 are arranged in parallel on the water inlet pipe 3, and when one water pump 31 fails, the other water pump 31 can be started to work.
The water-gas balance system further comprises a first drain pipe 6, a gas pipe 4, a tank body 5 and a second drain pipe 7, wherein one end of the first drain pipe 6 is communicated with a water cooling pipe section 13, and the other end of the first drain pipe is communicated with the middle position of the tank body 5. One end of the air pipe 4 is communicated with the hot nitrogen area 11, and the other end is communicated with the upper end inside the tank body 5. The first drain pipe 6 and the air pipe 4 are flexible pipes, and the first drain pipe 6 and the air pipe 4 cannot be damaged and broken when the cross-linked pipe 1 stretches or contracts.
One end of the second drain pipe 7 is communicated with the bottom of the tank body 5, and the other end of the second drain pipe is positioned in the cooling water tank 2 and is used for discharging water into the cooling water tank 2. The second drain pipe 7 is provided with a pressure relief valve 71 and a manual valve 72, the pressure relief valve 71 and the manual valve 72 are arranged in parallel, and the pressure relief valve 71 comprises a valve and a straight-travel electronic electric actuator. Along the advancing direction of the cable in the cross-linking pipe 1, the joint of the first drain pipe 6 and the cross-linking pipe 1 is positioned at the upstream of the joint of the water inlet pipe 3 and the cross-linking pipe 1, so that the flowing direction of the cooling water in the cross-linking pipe 1 is opposite to the advancing direction of the cable in the cross-linking pipe 1.
The tank body 5 is also provided with a liquid level meter, the water-air balance system further comprises a PLC, and the liquid level meter, the water pump 31 and the pressure release valve 71 are all connected with the PLC.
Working principle: the hot nitrogen area 11 is filled with nitrogen, and the water pump 31 is operated to feed cooling water into the water cooling pipe section 13 from the cooling water tank 2, then enters the tank body 5 from the first water drain pipe 6, and flows back into the cooling water tank 2 from the second water drain pipe 7.
The nitrogen is in contact with the water in the buffer tube section 12 and is in equilibrium. Simultaneously, nitrogen in the cross-linking pipe 1 enters into the upper end inside the tank body 5, water in the cross-linking pipe 1 flows into the lower end inside the tank body 5, the nitrogen and the water are balanced in the tank body 5, the liquid level meter detects the liquid level and transmits signals to the PLC, and the upper limit and the lower limit of the liquid level are preset in the PLC.
The PLC compares the liquid level signal with the upper and lower limit values of the liquid level, if the liquid level signal is close to the upper limit value of the liquid level, the water pressure is judged to be too large, cooling water in the crosslinking pipe 1 is approaching to the hot nitrogen area 11, the PLC controls the pressure release valve 71 to increase the opening amplitude, the pressure of the water is released, and the power of the water pump 31 can be reduced according to the situation.
If the liquid level signal is close to the lower limit value of the liquid level, the water pressure is judged to be too small, the nitrogen in the crosslinking pipe 1 is approaching to the water cooling pipe section 13, the PLC controls the pressure release valve 71 to reduce the opening amplitude, and the power of the water pump 31 can be increased according to the situation.
Example 2: a water-gas balance system is shown in fig. 2, and comprises an embodiment 1, wherein a base 14 is fixed on the outer wall of a cross-linking tube 1, an adjusting shaft 15 is rotatably connected to the base 14, the adjusting shaft 15 is radially arranged along the cross-linking tube 1, and one end of the adjusting shaft extends into the cross-linking tube 1 from the side wall of the cross-linking tube 1. The adjusting shaft 15 is in rotary sealing with the side wall of the crosslinking tube 1. The end of the adjusting shaft 15 positioned in the crosslinking tube 1 is fixed with a gear 151, the inner wall of the tube is fixed with a guide groove, the guide groove is embedded with an adjusting tube 161, the side wall of the adjusting tube 161 is fixed with a rack 16, and the rack 16 is meshed with the gear 151. One end of the adjusting pipe 161 is an opening, the other end of the adjusting pipe is connected with a movable hose 162, the middle part of the movable hose 162 is wound on the adjusting shaft 15, the side wall of the cross-linking pipe 1 is provided with a first isolation valve, and the other end of the movable hose 162 is connected with the first isolation valve. The first isolation valve is connected with a discharge pipe 18, and a second isolation valve is further installed on the discharge pipe 18. The seat body 14 is connected with a locking bolt 141 in a threaded manner, and the rod part of the locking bolt 141 abuts against the side wall of the adjusting shaft 15. The discharge pipe 18 is arranged vertically downwards, so that the material can flow out conveniently.
Because the pipeline of the cross-linking pipe 1 is made of stainless steel, a worker can only judge whether water and gas are balanced by means of the liquid level meter in the tank body 5, and cannot verify the water and gas balance result controlled by the PLC (programmable logic controller) of the liquid level meter. Secondly, in the manual control mode, the staff needs to know the specific positions of water and nitrogen more accurately to grasp the actual condition of water-gas balance.
Therefore, the invention is also provided with the adjusting shaft 15 on the outer wall of the crosslinking tube 1, and the adjusting shaft 15 can be rotated to drive the position of the adjusting tube 161 in the crosslinking tube 1. When the state of the material at the first site needs to be judged, the second isolation valve is closed, the first isolation valve is opened, the material in the crosslinking pipe 1 enters the discharging pipe 18 at the moment, the first isolation valve is closed, the second isolation valve is opened, and the material in the discharging pipe 18 flows out at the moment, so that whether the material is water or nitrogen is judged. When the material state at the second position needs to be judged, the rotation adjusting shaft 15 drives the opening of the adjusting pipe 161 to move to the second position, the second isolation valve is closed firstly, then the first isolation valve is opened, after the material enters the discharging pipe 18, the first isolation valve is closed, the second isolation valve is opened, and at the moment, the material in the discharging pipe 18 flows out, so that whether the material at the second position is water or nitrogen is judged. When designing, the first site and the second site correspond to water and nitrogen locations, respectively. Assuming that the first site is not water but nitrogen, this indicates that the water pressure is too low and that manual valve 72 needs to be closed. Assuming that water, not nitrogen, is present at the second site, this indicates that the water pressure is too high and that the manual valve 72 needs to be opened.
Example 3: the difference between the water vapor balance system and the embodiment 1 is that the first drain pipe 6 and the air pipe 4 are connected to the buffer pipe section 12.
Claims (8)
1. The utility model provides a water vapor balance system, includes crosslinked pipe (1), include hot nitrogen district (11), buffer tube section (12), water-cooled tube section (13) in proper order in crosslinked pipe (1), its characterized in that: still include cooling water pond (2), connect cooling water pond (2) with inlet tube (3) of water-cooled tube section (13), install in water pump (31) on inlet tube (3), connect water-cooled tube section (13) or first drain pipe (6), jar body (5), PLC, connection of buffer tube section (12) hot nitrogen district (11) or trachea (4) of buffer tube section (12), first drain pipe (6) with jar body (5) are inside to be linked together, trachea (4) with jar body (5) are inside to be linked together upper end, install the level gauge in jar body (5), jar body (5) bottom is connected with second drain pipe (7), pressure release valve (71) are installed to second drain pipe (7), water pump (31) the level gauge pressure release valve (71) all are connected PLC.
2. A water vapor balance system as set forth in claim 1 wherein: the number of the water pumps (31) is two and the water pumps are arranged in parallel.
3. A water vapor balance system as set forth in claim 1 wherein: the second drain pipe (7) is provided with a manual valve (72), and the manual valve (72) is arranged in parallel with the pressure release valve (71).
4. A water vapor balance system as set forth in claim 1 wherein: the water outlet of the second water outlet pipe (7) is connected with the cooling water tank (2).
5. A water vapor balance system as set forth in claim 1 wherein: still include a plurality of supports (8), guide pulley (81) are installed to support (8), crosslinked pipe (1) are arranged in on guide pulley (81), first drain pipe (6) trachea (4) are the hose.
6. A water vapor balance system as set forth in claim 1 wherein: the cross-linking pipe (1) comprises a plurality of pipelines, and two adjacent pipelines are connected through flanges.
7. A water vapor balance system as set forth in claim 1 wherein: along the advancing direction of the cable in the cross-linking pipe (1), the joint of the first water discharging pipe (6) and the cross-linking pipe (1) is positioned at the upstream of the joint of the water inlet pipe (3) and the cross-linking pipe (1).
8. A water vapor balance system as set forth in claim 1 wherein: the pressure relief valve (71) comprises a straight-travel electronic electric actuator and a valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311021775.2A CN116959818B (en) | 2023-08-14 | 2023-08-14 | Water-gas balance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311021775.2A CN116959818B (en) | 2023-08-14 | 2023-08-14 | Water-gas balance system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116959818A true CN116959818A (en) | 2023-10-27 |
| CN116959818B CN116959818B (en) | 2024-02-27 |
Family
ID=88458358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311021775.2A Active CN116959818B (en) | 2023-08-14 | 2023-08-14 | Water-gas balance system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116959818B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1318418A (en) * | 1970-08-18 | 1973-05-31 | Anaconda Wire & Cable Co | Continuously manufactured cable |
| US4533306A (en) * | 1983-10-31 | 1985-08-06 | Pirelli Cable Corporation | Apparatus for maintaining level of liquid-gas interface in a vulcanizing tube |
| JPH06181018A (en) * | 1992-12-14 | 1994-06-28 | Showa Electric Wire & Cable Co Ltd | Vertical cable cooler |
| JP2001030048A (en) * | 1999-07-22 | 2001-02-06 | Tokai Kogyo Co Ltd | Metal molding, its molding method and molding die |
| CN201290314Y (en) * | 2008-08-26 | 2009-08-19 | 陈铁强 | Pulp suction device |
| CN102290151A (en) * | 2011-09-02 | 2011-12-21 | 王向超 | High-voltage cable cross-linking device |
| CN206937943U (en) * | 2017-07-06 | 2018-01-30 | 河北卫华电工机械有限公司 | Cable vulcanizes and is crosslinked with lower closing non-resistance sealing device |
| CN108480890A (en) * | 2018-01-31 | 2018-09-04 | 徐州工程学院 | One kind being used for underground engineering waste pipe welder and its working method |
| CN210800046U (en) * | 2019-07-29 | 2020-06-19 | 白城天奇装备机械有限公司 | Sealer water sealing system under three-layer co-extrusion dry-method crosslinking production line |
| CN218768877U (en) * | 2022-10-27 | 2023-03-28 | 江苏红云电缆有限公司 | High-low voltage irradiation crosslinking power cable apparatus for producing |
-
2023
- 2023-08-14 CN CN202311021775.2A patent/CN116959818B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1318418A (en) * | 1970-08-18 | 1973-05-31 | Anaconda Wire & Cable Co | Continuously manufactured cable |
| US4533306A (en) * | 1983-10-31 | 1985-08-06 | Pirelli Cable Corporation | Apparatus for maintaining level of liquid-gas interface in a vulcanizing tube |
| JPH06181018A (en) * | 1992-12-14 | 1994-06-28 | Showa Electric Wire & Cable Co Ltd | Vertical cable cooler |
| JP2001030048A (en) * | 1999-07-22 | 2001-02-06 | Tokai Kogyo Co Ltd | Metal molding, its molding method and molding die |
| CN201290314Y (en) * | 2008-08-26 | 2009-08-19 | 陈铁强 | Pulp suction device |
| CN102290151A (en) * | 2011-09-02 | 2011-12-21 | 王向超 | High-voltage cable cross-linking device |
| CN206937943U (en) * | 2017-07-06 | 2018-01-30 | 河北卫华电工机械有限公司 | Cable vulcanizes and is crosslinked with lower closing non-resistance sealing device |
| CN108480890A (en) * | 2018-01-31 | 2018-09-04 | 徐州工程学院 | One kind being used for underground engineering waste pipe welder and its working method |
| CN210800046U (en) * | 2019-07-29 | 2020-06-19 | 白城天奇装备机械有限公司 | Sealer water sealing system under three-layer co-extrusion dry-method crosslinking production line |
| CN218768877U (en) * | 2022-10-27 | 2023-03-28 | 江苏红云电缆有限公司 | High-low voltage irradiation crosslinking power cable apparatus for producing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116959818B (en) | 2024-02-27 |
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