CN113363001A - Weighing sensor wire high-temperature-resistant protective sleeve and mounting method - Google Patents
Weighing sensor wire high-temperature-resistant protective sleeve and mounting method Download PDFInfo
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- CN113363001A CN113363001A CN202110649930.XA CN202110649930A CN113363001A CN 113363001 A CN113363001 A CN 113363001A CN 202110649930 A CN202110649930 A CN 202110649930A CN 113363001 A CN113363001 A CN 113363001A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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- 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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to a high-temperature-resistant protective sleeve for a weighing sensor wire, which comprises an outer pipe, a plurality of high-temperature-resistant sleeves and a plurality of guide devices, wherein the high-temperature-resistant sleeves and the guide devices are positioned in the outer pipe; the side face of the guide protection main body is provided with a plurality of connecting screw holes, the connecting screw holes lead to the first conduit holes, the high-temperature-resistant sleeve is provided with connecting through holes, and the guide protection main body is fixedly connected with the high-temperature-resistant sleeve by fixing bolts. The invention effectively solves the problem that the lead of the weighing sensor is easy to damage.
Description
Technical Field
The invention relates to a wire protection tube, in particular to a high-temperature-resistant protection sleeve for a weighing sensor wire and an installation method thereof.
Background
The weighing accuracy of the ladle arm of the continuous casting machine in the steel plant is particularly important for production, and the weighing of the ladle arm directly influences the yield of steel slag and steel billets. In the pouring process of the ladle, when molten steel overflows due to heat preservation and slagging or other reasons, a connecting wire of a weighing sensor is directly scalded, so that the accuracy of data is influenced, and the main reason for influencing the weighing precision is considered; in addition, in the maintenance process of the rotary table, due to objects or other reasons, the connecting wires of the weighing sensors are broken or damaged, so that data are inaccurate or not displayed, but maintenance personnel cannot accurately judge the line or the sensor fault, the maintenance personnel cannot process the line in the production process and can process the line only when stopping casting or maintaining, and the personnel are in a high-temperature environment when stopping casting, so that safety accidents are easily caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-temperature-resistant protective sleeve for a weighing sensor wire and an installation method thereof, and effectively solves the problem that the wire of the weighing sensor is easy to damage.
The technical purpose of the invention is realized by the following technical scheme:
a high-temperature resistant protective sleeve for a weighing sensor lead comprises an outer tube, a plurality of high-temperature resistant sleeves and a plurality of cylindrical guide devices, wherein the plurality of high-temperature resistant sleeves are positioned in the outer tube,
the guide device comprises a guide protection main body and an end cover, wherein the guide protection main body is of a cylindrical structure, a plurality of first guide pipe holes are formed in the middle of the guide protection main body, a plurality of ball channels with openings facing the end cover are symmetrically formed in the outer side surface of the guide protection main body, each ball channel is provided with a ball, the balls are fixed in the ball channels and partially protrude out of the surface of the guide protection main body, the end cover is provided with a plurality of second guide pipe holes matched with the first guide pipe holes, the inner diameters of the first guide pipe holes and the second guide pipe holes are the same as the outer diameter of the high-temperature-resistant sleeve, and the end cover is detachably connected with the guide protection main body to seal the balls in the ball channels;
the high-temperature-resistant sleeve pipe is provided with a connecting screw hole matched with the connecting screw hole, the high-temperature-resistant sleeve pipe penetrates through the first conduit hole and the second conduit hole, the fixing bolt is in threaded connection with the connecting screw hole and penetrates through the connecting through hole, and the guide protection main body is fixedly connected with the high-temperature-resistant sleeve pipe.
When the guide device is used, balls are placed in the ball groove on the outer side surface of the guide protection main body, then the end cover covers the guide protection main body, the balls are prevented from sliding out, the end cover is fixed on the guide protection main body through bolts, a guide device is formed, a plurality of guide pipe holes allowing the high-temperature-resistant sleeve to pass through are formed in the middle of the guide device, namely, a first guide pipe hole of the guide protection main body and a second guide pipe hole of the end cover are formed, a plurality of balls facilitating the guide device to move in the outer pipe are arranged on the outer side surface of the guide device, a plurality of guide devices are installed and fixed outside the high-temperature-resistant sleeve, the high-temperature-resistant sleeve is convenient to penetrate into the outer pipe, the high-temperature-resistant sleeve is also beneficial to preventing the high-temperature-resistant sleeve from contacting with the pipe wall of the outer pipe, the high-temperature-resistant sleeve can use a pipeline with good flexibility, and the plurality of guide devices also have the function of supporting and shaping.
In one embodiment, two positioning springs are arranged in the ball channel, and the ball is positioned between the two positioning springs.
In one embodiment, the edge of the end cover is provided with an alignment protrusion matched with the ball channel, and the alignment protrusion is embedded into the ball channel.
In one embodiment, the number of coupling screw holes is the same as the number of first conduit holes.
In one embodiment, the high-temperature-resistant sleeves are formed by connecting a plurality of sub-sleeves end to end, and at least one guide device is arranged outside each sub-sleeve. The guide device is installed in the sub-sleeves firstly, and then the sub-sleeves are connected end to end, so that the installation efficiency is improved, and the sub-sleeves can be installed according to the length requirement on the site.
In one embodiment, the sub-sleeve is a flexible metal tube. The outer pipe adopts stainless steel pipe or galvanized pipe, and the son sleeve pipe can adopt the red copper pipe after the annealing, and in the position that needs relative activity, the son sleeve pipe can adopt the stainless steel hose, therefore high temperature resistant sleeve pipe can make multiple angle, and extensive applicability is extensive.
A method for installing a high-temperature-resistant protective sleeve of a weighing sensor lead comprises the following steps,
each group of sub-sleeves penetrate through the guide device, the connecting through holes in the sub-sleeves are aligned to the guide screw holes of the guide device, the sub-sleeves are fixedly connected with the guide device through the screw-in fixing bolts, the multiple groups of sub-sleeves are fixedly connected end to form high-temperature-resistant sleeves, the wires of the weighing sensors penetrate through the high-temperature-resistant sleeves, the high-temperature-resistant sleeves penetrate into the outer pipes, the balls on the outer sides of the guide devices play a guiding role, the high-temperature-resistant sleeves of the sleeves integrally slide into the outer pipes, and then the outer pipes are fixedly connected with a large wrapping arm of a continuous casting machine.
In one embodiment, two ends of each group of the sub-sleeves are respectively provided with a guide device. And the guide devices are arranged at the two ends of the sub-sleeve, so that the guide devices are convenient to position and install, and the sub-sleeve can conveniently penetrate through the outer pipe.
In conclusion, the invention has the following beneficial effects:
the invention puts the wire of the weighing sensor into the high-temperature resistant sleeve, and effectively prevents the wire of the weighing sensor from being damaged due to the overflow or collision of molten steel.
Drawings
FIG. 1 is a three-dimensional view of a pilot guard body of the present invention;
FIG. 2 is a three-dimensional view of the end closure of the present invention;
FIG. 3 is a perspective view of the guide of the present invention;
figure 4 is a schematic view of the guide of the present invention installed within a sub-sleeve of a high temperature resistant sleeve.
In the figure, 1-guide protection body, 11-first conduit hole, 12-ball channel, 13-first fixing threaded hole, 14-connecting threaded hole, 2-end cover, 21-second conduit hole, 22-alignment bulge, 23-second fixing threaded hole, 3-ball, 4-positioning spring, 5-sub-sleeve and 6-outer tube.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
It should be noted that all the directional terms such as "upper" and "lower" referred to herein are used with respect to the view of the drawings, and are only for convenience of description, and should not be construed as limiting the technical solution.
In the pouring process of the ladle, when molten steel overflows due to heat preservation and slagging or other reasons, a connecting wire of a weighing sensor is directly scalded, so that the accuracy of data is influenced, and the main reason for influencing the weighing precision is considered; in addition, in the process of overhauling the rotary table, due to objects or other reasons, a connecting wire of the weighing sensor is broken or damaged, so that data is inaccurate or not displayed. As shown in fig. 1-4, the present invention provides a weighing sensor wire high temperature resistant protective sleeve, which comprises an outer tube 6, a plurality of high temperature resistant sleeves located in the outer tube 6, and a plurality of cylindrical guiding devices for fixing the high temperature resistant sleeves,
the guide device comprises a guide protection main body 1 and an end cover 2, wherein the guide protection main body 1 is of a cylindrical structure, a plurality of first guide pipe holes 11 are formed in the middle of the guide protection main body 1, a plurality of ball channels 12 with openings facing the end cover 2 are symmetrically formed in the outer side face of the guide protection main body 1, each ball channel 12 is provided with a ball 3, the balls 3 are fixed in the ball channels 12 and partially protrude out of the surface of the guide protection main body 1, the end cover 2 is provided with a plurality of second guide pipe holes 21 matched with the first guide pipe holes 11, the inner diameters of the first guide pipe holes 11 and the second guide pipe holes 21 are the same as the outer diameter of a high-temperature-resistant sleeve, and the end cover 2 is detachably connected with the guide protection main body 1 to seal the balls 3 in the ball channels 12;
the number of the high-temperature-resistant sleeves is smaller than or equal to the number of the first conduit holes 11 in the same guide main body, a plurality of connecting screw holes 14 are further formed in the side face of the guide protection main body 1, the connecting screw holes 14 are communicated with the first conduit holes 11, the high-temperature-resistant sleeves are provided with connecting through holes matched with the connecting screw holes 14, the high-temperature-resistant sleeves penetrate through the first conduit holes 11 and the second conduit holes 21, fixing bolts are in threaded connection with the connecting screw holes 14 and penetrate through the connecting through holes, and the guide protection main body 1 is fixed and fixedly connected with the high-temperature-resistant sleeves.
When in installation, the high temperature resistant sleeve is fixedly connected with the guiding device, specifically, the ball 3 is put into the ball channel 12 on the outer side surface of the guiding protection main body 1, then the end cover 2 is covered on the guide protection main body 1 to prevent the ball 3 from sliding out, the end cover 2 is fixed on the guide protection main body 1 through a bolt to form a guide device, a plurality of guide pipe holes for the high temperature resistant sleeve to pass through are arranged in the middle of the guide device, i.e. the first conduit hole 11 leading to the protective body 1 and the second conduit hole 21 leading to the end cap 2, the outer side of the guide means being provided with a plurality of balls 3 facilitating the movement of the guide means inside the outer tube 6, a plurality of guider are fixed in the outer installation of high temperature resistant sleeve pipe, are convenient for penetrate outer tube 6 with high temperature resistant sleeve pipe in, also are favorable to preventing the pipe wall contact of high temperature resistant sleeve pipe and outer tube 6, and high temperature resistant sleeve pipe can use the pipeline that the compliance is good, and a plurality of guider also have the effect of supporting the design to high temperature resistant sleeve pipe.
Further, two positioning springs 4 are arranged in the ball groove 12, and the ball 3 is located between the two positioning springs 4. The positioning spring 4 functions to fix the position of the ball 3 without affecting the rolling of the ball 3.
Further, the edge of the end cover 2 is provided with an alignment protrusion 22 matched with the ball groove 12, and the alignment protrusion 22 is embedded in the ball groove 12.
Further, the number of the coupling screw holes 14 is the same as the number of the first conduit holes 11.
Furthermore, a plurality of the high-temperature-resistant sleeves are formed by connecting a plurality of groups of sub-sleeves 5 end to end, and at least one guide device is arranged outside each group of the sub-sleeves 5. Firstly, a guide device is installed in the sub-sleeves 5, and then the sub-sleeves 5 are connected end to end, so that the installation efficiency is improved, and the installation can be carried out according to the length requirement on the site.
Further, the sub-sleeve 5 is a metal pipe having good flexibility. The outer pipe 6 is a stainless steel pipe or a galvanized pipe, the sub-sleeve 5 can be a copper pipe after annealing, and the sub-sleeve 5 can be a stainless steel hose at a position needing relative movement, so that the high-temperature-resistant sleeve can be manufactured into various angles, and the applicability is wide.
The invention also provides a method for installing the high-temperature-resistant protective sleeve of the weighing sensor lead, in particular to a method for installing the high-temperature-resistant protective sleeve of the weighing sensor lead,
pass every group sleeve pipe 5 guider, make the connect the via hole on the sleeve pipe 5 aim at with guider's direction screw, screw in fixing bolt is with sleeve pipe 5 and guider fixed connection, form high temperature resistant sleeve pipe with multiunit sleeve pipe 5 end to end fixed connection, pass high temperature resistant sleeve pipe with weighing sensor's wire, penetrate in the outer tube 6 with high temperature resistant sleeve pipe, ball 3 in the guider outside plays the guide effect, make the sleeve pipe high temperature resistant sleeve pipe wholly slide in outer tube 6, then wrap arm fixed connection with outer tube 6 and conticaster greatly.
Furthermore, two ends of each group of the sub-sleeves 5 are respectively provided with a guiding device. And guide devices are arranged at two ends of the sub-sleeve 5, so that the guide devices are convenient to position and install, and the sub-sleeve 5 can conveniently penetrate through the outer pipe 6.
The structure of the guide device and the installation of the guide device in the high temperature resistant casing according to the present invention will be described below with specific examples.
Processing a cylinder with the outer diameter of 30mm and the height of 15mm by using round steel, processing two through holes with the inner diameter of 12.5mm at the center of the cylinder as guide pipe holes, uniformly processing six channels with the diameter of 3mm and the depth of 8mm at the periphery of the cylinder as ball channel 12, making a central point at the corresponding position of the ball channel 12 at the bottom of the cylinder, wherein a circular groove can be used for placing the ball 3 with the diameter of 2.8mm, the ball 3 is exposed out of 1mm relative to the periphery of the cylinder, drilling four holes with the diameter of 3mm and the depth of 8mm near the guide pipe hole at the center of the bottom of the cylinder, cutting off the whole cylinder at a position 10mm downwards from the top surface of the cylinder, using the cylinder with the ball channel 12 as a guide protection main body 1, using the rest part as an end cover 2, tapping 3.5mm threads with the diameter of 3mm of four holes of the end cover 2 as second fixed threaded holes 23, tapping 3.5mm threads with the diameter of four holes of the guide protection main body 1 as first fixed threaded holes 13, drilling a connecting screw hole 14 at the thinnest part of the periphery of the guide protection main body 1;
milling six cylinders with the diameter of 2.8mm and the height of 2mm as alignment bulges 22 according to the position marked with the central point on the end cover 2, wherein the thickness of the end cover 2 is 2 mm;
six springs with the diameter of 2.8mm and the height of 3mm are respectively placed in six circular grooves, then six balls 3 with the diameter of 2.8mm are placed in the six circular grooves, springs with the diameter of 2.8mm and the height of 3mm are respectively placed on the alignment protrusions 22 of the end cover 2, the end cover 2 is buckled at the corresponding position on the guide protection main body 1, and the two parts are fixed by four bolts with the diameter of 4mm to form a guide device.
During the use, according to the required length in scene with the copper tubing through annealing of internal diameter 8mm cut into a plurality of sub-sleeve pipes 5, the length of sub-sleeve pipe 5 is 200mm roughly, pass sub-sleeve pipe 5 guider, it is fixed with sub-sleeve pipe 5 with M3.5's bolt, it can directly to penetrate the other end from copper tubing one end with weighing sensor wire, it forms high temperature resistant sleeve pipe to weld a plurality of sub-sleeve pipes 5 head and the tail, in penetrating outer tube 6 with high temperature resistant sleeve pipe is whole, it is fixed on big package arm to weld outer tube 6. For the relatively movable part, the sub-sleeve 5 can adopt a stainless steel hose, and the invention can isolate the external force and the high-temperature molten steel from the connecting lead, thereby ensuring the normal operation of the connecting lead of the sensor to the maximum extent.
The invention puts the wire of the weighing sensor into the high-temperature resistant sleeve, and effectively prevents the wire of the weighing sensor from being damaged due to the overflow or collision of molten steel, the invention installs a plurality of guiding devices in the high-temperature resistant sleeve, and the guiding devices play a role of guiding and sliding and also have a role of avoiding the contact of the high-temperature resistant sleeve and the outer tube 6, because the outer tube 6 is in a high-temperature environment, the temperature of the tube wall is higher, if the high-temperature resistant sleeve is contacted with the high-temperature tube wall for a long time, the temperature of the high-temperature resistant sleeve is raised, so that the wire in the high-temperature resistant sleeve is easy to damage, and the invention effectively solves the problem that the wire of the weighing sensor is easy to damage.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures, and it is to be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both orientations of "above … …" and "below … …". The device may also be oriented 90 or at other orientations and the spatially relative descriptors used herein interpreted accordingly.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A high-temperature-resistant protective sleeve for a weighing sensor lead is characterized by comprising an outer tube (6), a plurality of high-temperature-resistant sleeves and a plurality of cylindrical guide devices, wherein the plurality of high-temperature-resistant sleeves are positioned in the outer tube (6),
the guide device comprises a guide protection main body (1) and an end cover (2), wherein the guide protection main body (1) is of a cylindrical structure, a plurality of first guide pipe holes (11) are formed in the middle of the guide protection main body (1), a plurality of ball channels (12) with openings facing the end cover (2) are symmetrically formed in the outer side face of the guide protection main body (1), each ball channel (12) is provided with a ball (3), the balls (3) are fixed in the ball channels (12) and partially protrude out of the surface of the guide protection main body (1), the end cover (2) is provided with a plurality of second guide pipe holes (21) matched with the first guide pipe holes (11), the inner diameters of the first guide pipe holes (11) and the second guide pipe holes (21) are the same as the outer diameter of a high-temperature-resistant sleeve, and the end cover (2) is detachably connected with the guide protection main body (1), enclosing the balls (3) in the ball channels (12);
the high-temperature-resistant sleeve pipe is characterized in that the number of the high-temperature-resistant sleeve pipes is smaller than or equal to the number of first conduit holes (11) in the same guide main body, a plurality of connecting screw holes (14) are further formed in the side face of the guide protection main body (1), the connecting screw holes (14) lead into the first conduit holes (11), the high-temperature-resistant sleeve pipes are provided with connecting through holes matched with the connecting screw holes (14), the high-temperature-resistant sleeve pipes penetrate through the first conduit holes (11) and the second conduit holes (21), fixing bolts are in threaded connection with the connecting screw holes (14) and penetrate through the connecting through holes, and the guide protection main body (1) is fixedly connected with the high-temperature-resistant sleeve pipes.
2. A weighing sensor wire high temperature resistant protective sleeve according to claim 1, characterized in that two positioning springs (4) are arranged in the ball channel (12), and the ball (3) is positioned between the two positioning springs (4).
3. A weighing sensor wire high temperature resistant protective sleeve according to claim 2, characterized in that the edge of the end cap (2) is provided with an alignment protrusion (22) fitting with the ball channel (12), the alignment protrusion (22) being embedded in the ball channel (12).
4. A weighing sensor wire high temperature resistant protective sleeve according to claim 1, characterized in that the number of said connection screw holes (14) is the same as the number of first conduit holes (11).
5. The weighing sensor wire high-temperature-resistant protective sleeve according to claim 4, wherein a plurality of the high-temperature-resistant sleeves are formed by connecting a plurality of sub-sleeves (5) end to end, and at least one guide device is installed outside each sub-sleeve (5).
6. A weighing sensor wire high temperature resistant protective sleeve according to claim 5, characterized in that the sub-sleeve (5) is a flexible metal tube.
7. A method for installing a high-temperature-resistant protective sleeve for a lead of a weighing sensor is suitable for the high-temperature-resistant protective sleeve for the lead of the weighing sensor according to claim 6, and is characterized in that each group of sub-sleeves (5) passes through a guide device, so that connecting through holes in the sub-sleeves (5) are aligned to guide screw holes of the guide device, fixing bolts are screwed in to fixedly connect the sub-sleeves (5) with the guide device, a plurality of groups of sub-sleeves (5) are fixedly connected end to form the high-temperature-resistant sleeves, the lead of the weighing sensor passes through the high-temperature-resistant sleeves, the high-temperature-resistant sleeves are penetrated into an outer pipe (6), and balls (3) outside the guide device play a role in guiding, so that the high-temperature-resistant sleeves of the sleeves slide into the outer pipe (6) integrally, and then the outer pipe (6) is fixedly connected with a large wrapping arm of a continuous casting machine.
8. The mounting method according to claim 7, wherein guide means are mounted to both ends of each set of said sub-sleeves (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110649930.XA CN113363001B (en) | 2021-06-10 | 2021-06-10 | Weighing sensor wire high-temperature-resistant protective sleeve and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110649930.XA CN113363001B (en) | 2021-06-10 | 2021-06-10 | Weighing sensor wire high-temperature-resistant protective sleeve and mounting method |
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| CN113363001A true CN113363001A (en) | 2021-09-07 |
| CN113363001B CN113363001B (en) | 2022-05-27 |
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| CN209199630U (en) * | 2018-11-10 | 2019-08-02 | 深圳市金宁达科技有限公司 | A kind of cable cover(ing) of Wear-resistant, high-temperature resistant |
| CN110360386A (en) * | 2019-06-05 | 2019-10-22 | 安徽管益生新材料科技有限公司 | A kind of PPR pipe resistant to high temperature |
| CN211957210U (en) * | 2020-05-11 | 2020-11-17 | 四川新超电缆有限公司 | Crosslinked polyethylene insulated control cable |
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2021
- 2021-06-10 CN CN202110649930.XA patent/CN113363001B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1363010A (en) * | 1971-10-27 | 1974-08-14 | Int Standard Electric Corp | Method and apparatus for use in sealing a cable against the lengthwise passage of water |
| CN205810432U (en) * | 2016-06-02 | 2016-12-14 | 天津朗兴电线电缆有限公司 | A kind of detection cable |
| CN208090086U (en) * | 2018-04-08 | 2018-11-13 | 重庆康元水处理设备有限责任公司 | A kind of frost-cracking-preventing pipe proof protecting device |
| CN209199630U (en) * | 2018-11-10 | 2019-08-02 | 深圳市金宁达科技有限公司 | A kind of cable cover(ing) of Wear-resistant, high-temperature resistant |
| CN110360386A (en) * | 2019-06-05 | 2019-10-22 | 安徽管益生新材料科技有限公司 | A kind of PPR pipe resistant to high temperature |
| CN211957210U (en) * | 2020-05-11 | 2020-11-17 | 四川新超电缆有限公司 | Crosslinked polyethylene insulated control cable |
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| CN113363001B (en) | 2022-05-27 |
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