CN201559305U

CN201559305U - Polymer melt filter for producing high voltage crosslinkable polyethylene cable material

Info

Publication number: CN201559305U
Application number: CN2009202443884U
Authority: CN
Inventors: 赵洪; 韩宝忠; 王暄; 李迎
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2009-12-18
Filing date: 2009-12-18
Publication date: 2010-08-25
Anticipated expiration: 2019-12-18

Abstract

A polymer melt filter for producing a high voltage crosslinkable polyethylene cable material relates to a melt filter for producing a crosslinkable polyethylene cable material. The utility model solves the problem that the cleanliness of the cable material is influenced since the metal shreds generated by the friction between a filter screen and a machine head in the continuous screening process of a continuous screening filter enter into the filtered melt. A machine head connecting plate is connected with a template inner block through a connecting die; a cleaning slot is arranged on the template outer block on a face relative to the template inner block; a cleaning hole is disposed on the bottom of the cleaning slot and is communicated with a cleaning pipe; a water jacket is installed on the cleaning pipe; the inlet end of the water jacket is communicated with a water intake pipe between an electromagnetic valve and a first cooling hole; and the outlet end of the water jacket is communicated with a drain pipe. In the utility model, the metal shreds generated by the friction between the filter screen and the machine head in the continuous screening process will enter into the cleaning hole and flow away, thus meeting the requirement of cleanliness of the crosslinkable polyethylene cable material.

Description

Produce the macromolecule melt filter that uses in the high-voltage crosslinkable polyethylene cable material

Technical field

The utility model relates to a kind of fondant filter that uses in the crosslinkable polyethylene cable material of producing, and belongs to the production equipment technical field of CABLE MATERIALS.

Background technology

In order to satisfy the great demand of China's economic development to electric energy, country drops into huge fund and is strengthening high pressure, super-pressure, extra-high voltage grid construction.Follow power grid construction, it is persistently overheating that China recent years high pressure, ultra-high voltage cross-linking cable are produced heat, estimated 2010 and the demand of domestic 110kV in 2015,220kV crosslinked polyethylene (XLPE) insulated cable can reach 11500km and 23130km respectively.The vertical crosslinked cable production line of domestic existing import is more than 20 at present, build and planning to build the production line of establishing and also having more than 10 at least, production equipment is reached advanced world standards, possesses the ability of producing 500kV level XLPE insulated cable, and existing production capacity can be met the need of market.But the present domestic production technology that lacks the above electric pressure crosslinkable polyethylene cable material of 35kV, the whole dependence on import of cross-linked polyethylene insulating material of 110kV, 220kV and the above cable of 220kV.According to the evaluation criteria of high-voltage cross-linking polythene cable material, the cross-linked poly-ethylene cable material of 110kV and the above electric pressure of 110kV should reach higher cleanliness factor, requires usually that 70-100 μ m impurity content is less than 10 in every kilogram of CABLE MATERIALS.The present domestic supplier who meets above-mentioned cleanliness factor requirement resin that also do not have to provide.Therefore, in order to develop homemade high-voltage cross-linking polythene cable material, at first must break through the filtering technique of polyvinyl resin.

The macromolecule melt filter mainly is divided into shutdown draping filter, does not shut down the draping filter and walk the web filter three major types continuously.Adopting needs frequent shutdown to change the screen pack that is stained with impurity when shutting down the draping filter, so such filter can not be used to produce the high-voltage cross-linking polythene cable material; Adopt can be implemented in when not shutting down the draping filter and alternately change the screen pack that is stained with impurity in the continuous production, its shortcoming is to bring impurity easily in the process of changing screen pack; Adopt when walking web filter continuously and need not to change screen pack, can effectively avoid because of changing the impurity that screen pack is introduced, thereby such filter is particularly useful for the production of high-voltage cross-linking polythene cable material.But also there is defective in the existing web filter of walking continuously on structural design, promptly in the melt of walking continuously in the network process after the metal fillings that forms because of screen pack and head friction can enter filtration, thereby influences the cleanliness factor of CABLE MATERIALS.

The utility model content

The purpose of this utility model is in order to solve the existing web filter of walking continuously in the melt of walking continuously in the network process after the metal fillings that forms because of screen pack and head friction can enter filtration, thereby influence the problem of the cleanliness factor of CABLE MATERIALS, and then a kind of macromolecule melt filter that uses in the high-voltage crosslinkable polyethylene cable material of producing is provided.

The technical solution of the utility model is: produce the macromolecule melt filter that uses in the high-voltage crosslinkable polyethylene cable material and comprise the head connecting plate, connection mode, piece in the template, filter screen, the outer piece of template, contiguous block in the die holder, the outer contiguous block of die holder, pressure sensor, first thermocouple, two heater binding posts, a plurality of first heating rods, a plurality of second heating rods, two the 3rd heating rods, water inlet pipe, second electroheat pair, the 3rd electroheat pair, magnetic valve, many communicating pipes, drainpipe, scavenge pipe and water jacket, described head connecting plate is connected with piece in the template by connection mode, the outer piece of described template is connected the below of piece in the template, the cavity three of piece is coaxially set in the cavity of described head connecting plate and the cavity of connection mode and the template, contiguous block is installed on the sidewall of piece in the template in the described die holder, the outer contiguous block of described die holder is installed on the sidewall of the outer piece of template, the outer contiguous block of die holder is connected the below of contiguous block in the die holder, form the gap between the piece between the contiguous block and in outer piece of template and the template in outer contiguous block of die holder and the die holder, described filter screen passes between the contiguous block and the gap between outer piece of template and the interior piece of template in outer contiguous block of die holder and the die holder, in the cavity of sidewall through piece in the template of described pressure sensor by piece in the template, described first electroheat pair is inserted on the interior contiguous block of die holder, described two heater binding posts are installed on the head connecting plate, described a plurality of first heating rod is inserted on the interior piece of template, a plurality of second heating rods are inserted on the outer piece of template, respectively be fitted with one the 3rd heating rod on the outer contiguous block of contiguous block and die holder in the die holder, second electroheat pair is inserted on the interior piece of template, the 3rd electroheat pair is inserted on the outer piece of template, have the first cooling hole in the described template on the piece, have the second cooling hole on the outer piece of described template, have the 4th cooling hole and the 5th cooling hole in the described die holder on the contiguous block, have the 3rd cooling hole and the 6th cooling hole on the outer contiguous block of described die holder, one end in the described first cooling hole is equipped with water inlet pipe, magnetic valve is installed on the water inlet pipe, the other end in the first cooling hole was communicated with second end that cools off the hole by a communicating pipe, the other end in the second cooling hole was communicated with the 3rd end that cools off the hole by a communicating pipe, the other end in the 3rd cooling hole was communicated with the 4th end that cools off the hole by a communicating pipe, the other end in the 4th cooling hole was communicated with the 5th end that cools off the hole by a communicating pipe, the other end in the 5th cooling hole was communicated with the 6th end that cools off the hole by a communicating pipe, the other end in described the 6th cooling hole is communicated with drainpipe, piece in the described template, the outer piece of template, have a plurality of insulation holes on the outer contiguous block of contiguous block and die holder in the die holder, have rinse bath on corresponding of the outer piece of described template and the interior piece of template, have clean-out opening on the bottom land of described rinse bath, clean-out opening is communicated with scavenge pipe, water jacket is installed on the scavenge pipe, the entrance point of water jacket be arranged on magnetic valve and be communicated with the water inlet pipe of first cooling between the hole, the port of export of water jacket is communicated with drainpipe.

The utility model compared with prior art has following effect: the metal fillings that macromolecule melt filter of the present utility model forms walking screen pack and head friction in the network process continuously can enter clean-out opening and flow out, the degree of purity that has guaranteed the high-voltage crosslinkable polyethylene cable material produced reaches that 70-100 μ m impurity content is less than 10 in every kilogram of CABLE MATERIALS, has satisfied the requirement of high-voltage crosslinkable polyethylene cable material to cleanliness factor.

Description of drawings

Fig. 1 is that overall structure of the present utility model is overlooked cross-sectional schematic diagram, Fig. 2 is an overall structure vertical view of the present utility model, Fig. 3 is the upward view of Fig. 2, Fig. 4 is the left view of Fig. 3, Fig. 5 is the right view of Fig. 3, Fig. 6 is that the overall structure of piece is overlooked cross-sectional schematic diagram in the template, Fig. 7 is the overall structure vertical view of piece in the template, Fig. 8 is the partial sectional view of looking up of Fig. 7, Fig. 9 is the A-A cutaway view of Fig. 8, the overall structure of the outer piece of Figure 10 template is overlooked cross-sectional schematic diagram, Figure 11 is the overall structure vertical view of piece in the template, Figure 12 is the partial sectional view of overlooking of Figure 11, and Figure 13 is the partial sectional view of overlooking of Figure 10, and Figure 14 is a place partial enlarged drawing of Figure 10, Figure 15 is the b place partial enlarged drawing of Fig. 1, Figure 16 is the c place partial enlarged drawing of Figure 13, and Figure 17 is the rearview of Fig. 2, and Figure 18 is the left view after Fig. 1 removes interior contiguous block of die holder and the outer contiguous block of die holder.

The specific embodiment

The specific embodiment one: present embodiment is described in conjunction with Fig. 1-Figure 17, the macromolecule melt filter that uses in the production high-voltage crosslinkable polyethylene cable material of present embodiment comprises head connecting plate 1, connection mode 2, piece 3 in the template, filter screen 4, the outer piece 6 of template, contiguous block 7 in the die holder, the outer contiguous block 8 of die holder, pressure sensor 9, first thermocouple 10, two heater binding posts 11, a plurality of first heating rods 12, a plurality of second heating rods 13, two the 3rd heating rods 14, water inlet pipe 15, second electroheat pair 16, the 3rd electroheat pair 17, magnetic valve 18, many communicating pipes 19, drainpipe 20, scavenge pipe 25 and water jacket 26, described head connecting plate 1 is connected with piece 3 in the template by connection mode 2, the outer piece 6 of described template is connected the below of piece 3 in the template, the cavity three of piece 3 is coaxially set in the cavity of the cavity of described head connecting plate 1 and connection mode 2 and the template, contiguous block 7 is installed on the sidewall of piece 3 in the template in the described die holder, the outer contiguous block 8 of described die holder is installed on the sidewall of the outer piece 6 of template, the outer contiguous block 8 of die holder is connected the below of contiguous block 7 in the die holder, form the gap between the piece 3 between the contiguous block 7 and in outer piece 6 of template and the template in outer contiguous block 8 of die holder and the die holder, described filter screen 4 passes between the contiguous block 7 and gap between outer piece 6 of template and the interior piece 3 of template in outer contiguous block 8 of die holder and the die holder, in the cavity of sidewall through piece in the template 3 of described pressure sensor 9 by piece in the template 3, described first electroheat pair 10 is inserted on the interior contiguous block 7 of die holder, described two heater binding posts 11 are installed on the head connecting plate 1, described a plurality of first heating rod 12 is inserted on the interior piece 3 of template, a plurality of second heating rods 13 are inserted on the outer piece 6 of template, respectively be fitted with one the 3rd heating rod 14 on the outer contiguous block 8 of contiguous block 7 and die holder in the die holder, second electroheat pair 16 is inserted on the interior piece 3 of template, the 3rd electroheat pair 17 is inserted on the outer piece 6 of template, have the first cooling hole 3-1 in the described template on the piece 3, have the second cooling hole 6-1 on the outer piece 6 of described template, have the 4th cooling hole 7-1 and the 5th cooling hole 7-2 in the described die holder on the contiguous block 7, have the 3rd cooling hole 8-1 and the 6th cooling hole 8-2 on the outer contiguous block 8 of described die holder, the end of the described first cooling hole 3-1 is equipped with water inlet pipe 15, magnetic valve 18 is installed on the water inlet pipe 15, the other end of the first cooling hole 3-1 was communicated with second end that cools off hole 6-1 by a communicating pipe 19, the other end of the second cooling hole 6-1 was communicated with the 3rd end that cools off hole 8-1 by a communicating pipe 19, the other end of the 3rd cooling hole 8-1 was communicated with the 4th end that cools off hole 7-1 by a communicating pipe 19, the other end of the 4th cooling hole 7-1 was communicated with the 5th end that cools off hole 7-2 by a communicating pipe 19, the other end of the 5th cooling hole 7-2 was communicated with the 6th end that cools off hole 8-2 by a communicating pipe 19, the other end of described the 6th cooling hole 8-2 is communicated with drainpipe 20, piece 3 in the described template, the outer piece 6 of template, have a plurality of insulation holes 21 on the outer contiguous block 8 of contiguous block 7 and die holder in the die holder, have rinse bath 22 on 3 corresponding of the pieces in the outer piece 6 of described template and the template, have clean-out opening 23 on the bottom land of described rinse bath 22, clean-out opening 23 is communicated with scavenge pipe 25, water jacket 26 is installed on the scavenge pipe 25, the entrance point of water jacket 26 be arranged on magnetic valve 18 and be communicated with the water inlet pipe 15 of first cooling between the 3-1 of hole, the port of export of water jacket 26 is communicated with drainpipe 20.

The macromolecule melt filter of present embodiment pressure sensor 9 in use is connected with Pressure gauge by lead, heater binding post 11 is connected with temperature control table by lead, first electroheat pair 10, second electroheat pair 16 all are connected with temperature control table by lead with the 3rd electroheat pair 17, and a plurality of first heating rods 12, a plurality of second heating rod 13 all are connected with temperature control table by lead with two the 3rd heating rods 14.

The specific embodiment two: present embodiment is described in conjunction with Figure 15 and Figure 18, the macromolecule melt filter of present embodiment also increases sealing plate 24, the center of sealing plate 24 has filter screen by hole 24-1, filter screen 4 passes filter screen by hole 24-1, and described sealing plate 24 is arranged between the sidewall of the interior contiguous block 7 of die holder and the interior piece 3 of template and outer contiguous block 8 of die holder and the outer piece 6 of template.So be provided with, the material that effectively prevents fusion flows out between the sidewall of piece 6 outside contiguous block 8 and the template between the sidewall of piece 3 and outside the die holder in contiguous block 7 and the template in die holder.Other composition is identical with the specific embodiment one with annexation.

The specific embodiment three: present embodiment is described in conjunction with Fig. 1, the macromolecule melt filter of present embodiment also increases abacus 5, described orifice plate 5 is installed in the cavity of the outer piece 6 of template, and the upper surface of the upper surface of orifice plate 5 and the outer piece 6 of template is on same horizontal plane.So be provided with, be used to support filter screen 4, prevent that filter screen 4 is to lower recess.Other composition is identical with the specific embodiment one or two with annexation.

The course of work of macromolecule melt filter of the present utility model following (referring to Fig. 1-Figure 17):

The plastic extruder heating that 1, will be connected with the macromolecule melt filter before starting working, the temperature that guarantees extruded material according to manufacturing technique requirent between 120-250 ℃;

2, start working before piece 3 and the outer piece 6 of template in the heating head connecting plate 1, template, and make by temperature control table that the temperature of piece 3 and the outer piece 6 of template is stabilized between 120-250 ℃ as requested in head connecting plate 1, the template;

3, manometric low alarm setting and high alarm setting are set before starting working, when the macromolecule melt filter is worked, when the pressure of the polyethylene melt of macromolecule melt filter interior is lower than low alarm setting, the 3rd heating rod 14 that is positioned on the outer contiguous block 8 of die holder contiguous block 7 and die holder stops heating, and the magnetic valve 18 that is installed on the water inlet pipe 15 is opened, cooling water flow is crossed the macromolecule fondant filter, make the temperature at macromolecule melt filter two ends (being filter screen 4 entrance and exit places) between room temperature to 60 ℃, thereby the two ends of macromolecule melt filter are in sealing state, filter screen 4 transfixions.Along with the impurity that accumulates on the filter screen 4 increases, melt pressure in the macromolecule melt filter increases, when pressure reaches the high alarm setting of Pressure gauge setting, make the magnetic valve 18 on the water inlet pipe 15 close by control circuit, cut off cooling water, be positioned at the 3rd heating rod 14 on the outer contiguous block 8 of die holder contiguous block 7 and die holder; After heating in short-term, macromolecule melt filter two ends (being filter screen 4 entrance and exit places) temperature rises to more than 120 ℃, and material flows out from the slit of the left end of macromolecule melt filter under pressure, drives filter screen 4 simultaneously to left movement; Motion along with filter screen 4, melt pressure in the macromolecule melt filter reduces, when pressure is lower than the low alarm setting of Pressure gauge setting, the 3rd heating rod 14 that is positioned on the outer contiguous block 8 of die holder contiguous block 7 and die holder stops heating again, and the magnetic valve on the water inlet pipe 15 18 is opened, cooling water flow is crossed the macromolecule fondant filter, make macromolecule melt filter two ends (being filter screen 4 entrance and exit places) temperature reduce and progress into sealing state, last filter screen 4 remains static again, above process is carried out repeatedly, thereby realizes walking automatically net;

4, in filter screen 4 motion processes, filter screen 4 can produce metal fillings with interior piece 3 of template and outer piece 6 frictions of template, for preventing in the material after metal fillings enters filtration, rinse bath 22 outside template on the piece 6 and clean-out opening 23, and guarantee that some plastic melt flows out from this clean-out opening 23 when filter screen 4 motions, take away filter screen 4 and interior piece 3 of template and the outer piece 6 fricative metal fillings of template.

Claims

1. produce the macromolecule melt filter that uses in the high-voltage crosslinkable polyethylene cable material for one kind, it comprises head connecting plate (1), connection mode (2), piece (3) in the template, filter screen (4), the outer piece (6) of template, contiguous block (7) in the die holder, the outer contiguous block (8) of die holder, pressure sensor (9), first thermocouple (10), two heater binding posts (11), a plurality of first heating rods (12), a plurality of second heating rods (13), two the 3rd heating rods (14), water inlet pipe (15), second electroheat pair (16), the 3rd electroheat pair (17), magnetic valve (18), many communicating pipes (19), drainpipe (20), scavenge pipe (25) and water jacket (26), described head connecting plate (1) is connected with piece (3) in the template by connection mode (2), the outer piece (6) of described template is connected the below of piece (3) in the template, the cavity three of piece (3) is coaxially set in the cavity of the cavity of described head connecting plate (1) and connection mode (2) and the template, contiguous block (7) is installed on the sidewall of piece (3) in the template in the described die holder, the outer contiguous block (8) of described die holder is installed on the sidewall of the outer piece (6) of template, the outer contiguous block (8) of die holder is connected the below of contiguous block (7) in the die holder, form the gap between the piece (3) between the contiguous block (7) and in outer piece (6) of template and the template in outer contiguous block (8) of die holder and the die holder, described filter screen (4) passes between the contiguous block (7) and the gap between outer piece (6) of template and the interior piece (3) of template in outer contiguous block (8) of die holder and the die holder, in the cavity of sidewall through piece in the template (3) of described pressure sensor (9) by piece in the template (3), described first electroheat pair (10) is inserted on the interior contiguous block (7) of die holder, described two heater binding posts (11) are installed on the head connecting plate (1), described a plurality of first heating rods (12) are inserted on the interior piece (3) of template, a plurality of second heating rods (13) are inserted on the outer piece (6) of template, respectively be fitted with one the 3rd heating rod (14) on the outer contiguous block (8) of contiguous block (7) and die holder in the die holder, second electroheat pair (16) is inserted on the interior piece (3) of template, the 3rd electroheat pair (17) is inserted on the outer piece (6) of template, have the first cooling hole (3-1) in the described template on the piece (3), have the second cooling hole (6-1) on the outer piece (6) of described template, have the 4th cooling hole (7-1) and the 5th cooling hole (7-2) in the described die holder on the contiguous block (7), have the 3rd cooling hole (8-1) and the 6th cooling hole (8-2) on the outer contiguous block (8) of described die holder, one end in the described first cooling hole (3-1) is equipped with water inlet pipe (15), magnetic valve (18) is installed on the water inlet pipe (15), the other end in the first cooling hole (3-1) was communicated with second end that cools off hole (6-1) by a communicating pipe (19), the other end in the second cooling hole (6-1) was communicated with the 3rd end that cools off hole (8-1) by a communicating pipe (19), the other end in the 3rd cooling hole (8-1) was communicated with the 4th end that cools off hole (7-1) by a communicating pipe (19), the other end in the 4th cooling hole (7-1) was communicated with the 5th end that cools off hole (7-2) by a communicating pipe (19), the other end in the 5th cooling hole (7-2) was communicated with the 6th end that cools off hole (8-2) by a communicating pipe (19), the other end in described the 6th cooling hole (8-2) is communicated with drainpipe (20), piece (3) in the described template, the outer piece (6) of template, have a plurality of insulation holes (21) on the outer contiguous block (8) of contiguous block (7) and die holder in the die holder, it is characterized in that: have rinse bath (22) on corresponding of the piece (3) in the outer piece (6) of described template and the template, have clean-out opening (23) on the bottom land of described rinse bath (22), clean-out opening (23) is communicated with scavenge pipe (25), water jacket (26) is installed on the scavenge pipe (25), the entrance point of water jacket (26) be arranged on magnetic valve (18) and be communicated with water inlet pipe (15) between first cooling hole (3-1), the port of export of water jacket (26) is communicated with drainpipe (20).

2. according to the macromolecule melt filter that uses in the described production high-voltage crosslinkable polyethylene cable material of claim 1, it is characterized in that: described macromolecule melt filter also comprises sealing plate (24), the center of sealing plate (24) has filter screen by hole (24-1), filter screen (4) passes filter screen by hole (24-1), and described sealing plate (24) is arranged between the sidewall of the interior contiguous block (7) of die holder and the interior piece (3) of template and outer contiguous block (8) of die holder and the outer piece (6) of template.

3. according to the macromolecule melt filter that uses in claim 1 or the 2 described production high-voltage crosslinkable polyethylene cable materials, it is characterized in that: described macromolecule melt filter also comprises orifice plate (5), described orifice plate (5) is installed in the cavity of the outer piece (6) of template, and the upper surface of the upper surface of orifice plate (5) and the outer piece (6) of template is on same horizontal plane.