CN114055755A - Water diversion structure, rotary water diversion seat and mold cooling water circulation device - Google Patents

Water diversion structure, rotary water diversion seat and mold cooling water circulation device Download PDF

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Publication number
CN114055755A
CN114055755A CN202111607254.6A CN202111607254A CN114055755A CN 114055755 A CN114055755 A CN 114055755A CN 202111607254 A CN202111607254 A CN 202111607254A CN 114055755 A CN114055755 A CN 114055755A
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CN
China
Prior art keywords
water
water diversion
saddle
diversion
annular hose
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Granted
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CN202111607254.6A
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Chinese (zh)
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CN114055755B (en
Inventor
何海潮
时玲
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Changzhou Jinwei Guosheng Pipeline Equipment Co ltd
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Changzhou Jinwei Guosheng Pipeline Equipment Co ltd
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Publication of CN114055755A publication Critical patent/CN114055755A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/78Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/87Cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

The invention discloses a water distribution structure, a rotary water distribution seat and a mold cooling water circulating device, wherein the water distribution structure comprises an annular hose and a plurality of water distribution saddles arranged along the circumferential direction of the annular hose; the water diversion saddle is hooped on the annular hose, and a water through hole is formed in the position, opposite to the water diversion saddle, of the annular hose so as to be communicated with the water diversion saddle. The invention uses the water diversion saddle to replace the pagoda joint, and the water diversion hose is formed by a pipe, thereby effectively avoiding water leakage and pipe damage.

Description

Water diversion structure, rotary water diversion seat and mold cooling water circulation device
Technical Field
The invention relates to a water distribution structure, a rotary water distribution seat and a mold cooling water circulating device.
Background
Two circulation module chains of the double-wall corrugated pipe forming die do rotary motion along respective tracks and production directions, a pipeline for supplying water to the modules of the circulation module chains is connected with the circulation module chains or pulled by the chains to rotate along with the modules, the pipeline is circumferentially closed, the existing pipeline is a section of soft water pipe, such as a cloth-sandwiched rubber pipe, a PVC steel wire pipe, a silicone pipe, a water hose pipe and the like, a throat hoop is clamped on a pagoda joint, a section of hose is connected in series through the pagoda joint to form an annular hose, the strength and the flexibility of the annular hose are guaranteed, all taps are connected to each module, water is supplied to the module while the module rotates. However, when the vehicle is operated for a long time, various problems always occur, and the long time is limited to only one week or several days, and then problems occur in succession. Common problems are: the hose clamp cannot be clamped and water is leaked; the hose can not be clamped and the hose can be pulled out; the throat hoop is too tight, and the pipe is loosened and tightened to gnaw the joint of the pipe and the pagoda; the pipe with high water pressure bursts from the joint; layering the running broken parts of the pipes; and so on.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a water diversion structure, a water diversion saddle is used for replacing a pagoda joint, a water diversion hose is formed by a pipe, and water leakage and pipe damage can be effectively avoided.
In order to solve the technical problems, the technical scheme of the invention is as follows: a water diversion structure comprises an annular hose and a plurality of water diversion saddles arranged along the circumferential direction of the annular hose; wherein,
the water diversion saddle is hooped on the annular hose, and a water through hole is formed in the position, opposite to the water diversion saddle, of the annular hose so as to be communicated with the water diversion saddle.
Further, in order to communicate more modules by using fewer water diversion saddles, the water diversion structure further comprises multi-way joints in one-to-one correspondence with the water diversion saddles, and one joint of each multi-way joint is communicated with the corresponding water diversion saddle.
Further provided is a concrete structure of the water-diversion saddle, which comprises two subsections and at least two locking bolts; wherein,
the sub-parts are provided with arc-shaped grooves, and the arc-shaped grooves of the two sub-parts form an encircling space encircling the annular hose together;
the locking bolt locks the two sections so that the two sections together clamp the annular hose.
Further, the water diversion saddle is provided with a screw inner hole, the water through hole is opposite to the screw inner hole, and one joint of the multi-way joint is in threaded connection with the corresponding screw inner hole.
And further in order to prevent water from leaking between the annular hose and the water diversion saddle, a sealing ring surrounding the circumference of the corresponding water through hole is arranged between the annular hose and each water diversion saddle.
The invention also provides a rotary water distribution seat matched with the water distribution structure, which comprises:
the inner cylinder is internally provided with a chamber or at least two chambers which are separated from each other, and the inner cylinder is also provided with inner water inlets and water outlets which correspond to the chambers one by one and are communicated with the corresponding chambers;
the urceolus, the urceolus rotates to be installed outside the inner tube, form a transfer chamber or two at least transfer chambeies that separate each other between the internal perisporium of urceolus and the periphery wall of inner tube, the transfer chamber with the chamber one-to-one links to each other the chamber through the intercommunicating pore intercommunication, the urceolus is equipped with the outer inlet outlet with transfer chamber one-to-one and the corresponding transfer chamber of intercommunication.
Furthermore, the cavity and the transfer cavity are respectively provided with two.
Furthermore, the two chambers are arranged in parallel in the horizontal direction, and the two transfer chambers are arranged in parallel in the vertical direction.
In order to further ensure the sealing performance of the transfer cavity, a plurality of O-shaped rings suitable for sealing the transfer cavity are arranged between the inner peripheral wall of the outer cylinder and the outer peripheral wall of the inner cylinder.
Further, in order to conveniently connect the pipelines, two inner water inlets and two inner water outlets are arranged at the lower end part of the inner cylinder.
The present invention also provides a mold cooling water circulation apparatus for a double-wall corrugated pipe forming mold having a circulation module chain having a plurality of modules, comprising:
the annular hoses of the two water diversion structures are connected with the circulating module chain so as to synchronously rotate along with the circulating module chain;
the inner cylinder of the rotary water distribution seat is fixedly arranged on a fixed position of the double-wall corrugated pipe forming die, which is surrounded by the circulating module chain; wherein,
the two water diversion structures are respectively a water inlet water diversion structure and a water return water diversion structure, and two outer water inlets and water outlets of the rotary water diversion seat are respectively an outer water inlet and an outer water return outlet;
a cooling water inlet of the module is communicated with the corresponding water distribution saddle of the water inlet water distribution structure, and a cooling water outlet is communicated with the corresponding water distribution saddle of the water outlet water distribution structure;
the annular hose of the water inlet dividing structure is communicated with the outer water inlet to supply water to the outer water inlet through the outer water inlet, and the annular hose of the water return dividing structure is communicated with the outer water return port to discharge water through the outer water return port.
After the technical scheme is adopted, the invention has the following beneficial effects:
1. the water diversion structure utilizes the water diversion saddle to replace a pagoda joint, the water diversion saddle is hooped on the annular hose, the annular hose can be formed by directly using a section of hose, the hose is not required to be cut into dozens of sections, and a through water hole is arranged at the position of the annular hose, which is right opposite to the water diversion saddle, so that the annular hose is communicated with the water diversion saddle;
2. the rotary water distribution seat adopts a form that the inner cylinder is matched with the outer cylinder, and the water supply and drainage operations of the rotary water distribution structure are realized through the matching of the rotary outer water inlet and outlet and the fixed inner water inlet and outlet, so that the rotary water distribution seat is simple and practical, and can effectively avoid the winding of pipelines;
3. the circulation module chain of the double-wall corrugated pipe forming die makes rotary motion along a track and a production direction, each circulation module chain is matched with two water distribution structures and one rotary water distribution seat, annular hoses of the two water distribution structures are directly or indirectly fixed on the circulation module chain and synchronously rotate along with the circulation module chain, the two water distribution structures are a water inlet water distribution structure and a water return water distribution structure respectively, the rotary water distribution seat is provided with two mutually independent channels which are a water inlet channel and a water return channel respectively, cooling water from the outside enters the annular hoses of the water inlet water distribution structures through the water inlet channel and enters the modules through the water distribution saddles, and the water from the modules reaches the annular hoses through the water distribution saddles of the water return water distribution structures and then is discharged from the water return channels to form a finished closed loop, so that the modules can be well cooled.
Drawings
FIG. 1 is a schematic view of the structure of a water-splitting saddle of the present invention from one perspective;
FIG. 2 is a schematic structural view from another perspective of the water knock saddle of the present invention;
FIG. 3 is a schematic structural view of the rotary water diversion seat of the present invention;
FIG. 4 is a schematic structural view of a mold cooling water circulation device according to the present invention;
fig. 5 is an enlarged view of a portion a of fig. 4.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example one
As shown in fig. 1, 2, 4 and 5, a water diversion structure comprises an annular hose 1 and a plurality of water diversion saddles 2 which are arranged along the circumferential direction of the annular hose 1; wherein,
the water diversion saddle 2 is hooped on the annular hose 1, and a water through hole is formed in the position, opposite to the water diversion saddle 2, of the annular hose 1 so as to be communicated with the water diversion saddle 2.
In this embodiment, the annular hose 1 is a hose.
Specifically, the water diversion structure of the invention utilizes the water diversion saddle 2 to replace a pagoda joint, the water diversion saddle 2 is hooped on the annular hose 1, the annular hose 1 can be formed by directly using a section of hose, the hose is not required to be cut into dozens of sections, a water through hole is arranged at the position of the annular hose 1, which is right opposite to the water diversion saddle 2, so that the annular hose 1 is communicated with the water diversion saddle 2, because the annular hose 1 is a whole pipe, a plurality of potential water leakage points are reduced, the water diversion structure is not influenced under the condition of unstable and low water pressure, the pipe is not required to be cut by the pagoda joint, the service life of the water diversion structure is greatly prolonged, and the time for overhauling and maintenance is saved.
As shown in fig. 1, 2, 4 and 5, in order to communicate more modules 8 by using fewer water diversion saddles 2, the water diversion structure further comprises multiple through joints 3 corresponding to the water diversion saddles 2 one to one, and one joint of the multiple through joints 3 is communicated with the corresponding water diversion saddle 2.
In this embodiment, the multi-way joint 3 is a four-way joint.
As shown in fig. 1, 2, 4 and 5, the water-splitting saddle 2 comprises two sections 21 and at least two locking bolts 22; wherein,
the parts 21 are provided with arc-shaped grooves, and the arc-shaped grooves of the two parts 21 form an encircling space encircling the annular hose 1 together;
the locking bolt 22 locks the two sections 21 so that the two sections 21 together clamp the annular hose 1.
As shown in fig. 1, 2, 4 and 5, the water diversion saddle 2 is provided with a screw inner hole 23, the water through hole is opposite to the screw inner hole 23, and one joint of the multi-way joint 3 is in threaded connection with the corresponding screw inner hole 23.
In this embodiment, the hand-separating saddle is of a plastic structure, is light, flexible to rotate and low in price, and the screw inner hole 23 is made of steel, so that the strength of threads is guaranteed.
In the present embodiment, in order to prevent water from leaking between the annular hose 1 and the diversion saddle 2, a seal ring is provided between the annular hose 1 and each diversion saddle 2 so as to surround the circumference of the corresponding water passage hole. The position of the water diversion saddle 2, which is right opposite to the water through hole, is provided with a sealing groove, the sealing ring is embedded into the sealing groove, and the water diversion saddle 2 and the annular hose 1 tightly squeeze the sealing ring together.
In the embodiment, in order to prevent water from leaking from the joint of the multi-way joint 3 and the water diversion saddle 2, the thread of the screw inner hole 23 is a taper thread, and the taper thread is sealable.
Example two
As shown in fig. 3 and 4, a rotary water diversion seat which is used with the water diversion structure in the first embodiment comprises:
the inner cylinder 4 is internally provided with a chamber 41 or at least two chambers 41 which are separated from each other, and the inner cylinder 4 is also provided with inner water inlets and water outlets 42 which correspond to the chambers 41 one by one and are communicated with the corresponding chambers 41;
the outer cylinder 5, the outer cylinder 5 rotates to be installed outside the inner cylinder 4, form a transfer chamber 51 or at least two transfer chambers 51 that separate each other between the internal perisporium of outer cylinder 5 and the periphery wall of inner cylinder 4, transfer chamber 51 with cavity 41 one-to-one and link to each other cavity 41 through the intercommunicating pore intercommunication, the outer cylinder 5 is equipped with the outer inlet and outlet 52 that corresponds one-to-one with transfer chamber 51 and communicate corresponding transfer chamber 51.
In this embodiment, the outer cylinder 5 is rotatably mounted on the inner cylinder 4 by means of a bearing 7.
As shown in fig. 3, two chambers 41 and two transfer chambers 51 are provided.
As shown in fig. 3, the two chambers 41 are arranged in parallel in the horizontal direction, and the two relay chambers 51 are arranged in parallel in the vertical direction.
As shown in fig. 3, in order to ensure the sealing property of the relay chamber 51, a plurality of O-rings 6 adapted to seal the relay chamber 51 are provided between the inner circumferential wall of the outer cylinder 5 and the outer circumferential wall of the inner cylinder 4.
As shown in fig. 3, two inner water inlets and outlets 42 are provided at the lower end of the inner cylinder 4 for easy connection of piping.
Specifically, the rotary water distribution seat adopts a form that the inner cylinder 4 is matched with the outer cylinder 5, and the rotary water distribution structure realizes water supply and drainage operations through the matching of the rotary outer water inlet and outlet 52 and the fixed inner water inlet and outlet 42, is simple and practical, and can effectively avoid pipeline winding.
EXAMPLE III
As shown in fig. 1, 2, 3, 4, 5, a mold cooling water circulation apparatus for a double-wall corrugated pipe forming mold having a circulation module chain having a plurality of modules 8, comprising:
the two water diversion structures are as described in the first embodiment, and the annular hoses 1 of the two water diversion structures are connected with the circulating module chain so as to synchronously rotate along with the circulating module chain;
the rotary water diversion seat according to the second embodiment, wherein an inner cylinder 4 of the rotary water diversion seat is fixedly arranged at a fixed position of a double-wall corrugated pipe forming die, which is surrounded by a circulating module chain; wherein,
the two water diversion structures are respectively a water inlet water diversion structure and a water return water diversion structure, and the two outer water inlets and outlets 52 of the rotary water diversion seat are respectively an outer water inlet and an outer water return outlet;
the cooling water inlet of each module 8 is communicated with one joint of a multi-way joint 3 of the water inlet and distribution structure; the cooling water outlet of each module 8 is communicated with one joint of a multi-way joint 3 of the water outlet and distribution structure;
the annular hose 1 of the water inlet and water distribution structure is communicated with the outer water inlet to supply water to the outer water inlet, and the annular hose 1 of the water return and water distribution structure is communicated with the outer water return port to discharge water through the outer water return port.
Specifically, a circulating module chain of the double-wall corrugated pipe forming die makes rotary motion along a track and a production direction, each circulating module chain is matched with two water diversion structures and one rotary water diversion seat, annular hoses 1 of the two water diversion structures are directly or indirectly fixed on the circulating module chain and synchronously rotate along with the circulating module chain, the two water diversion structures are respectively a water inlet water diversion structure and a water return water diversion structure, the rotary water diversion seat is provided with two mutually independent channels which are respectively a water inlet channel and a water return channel, cooling water coming from the outside enters the annular hoses 1 of the water inlet water diversion structures through the water inlet channels and enters the modules 8 through the water diversion saddles 2, the water coming out of the modules 8 reaches the annular hoses 1 through the water diversion saddles 2 of the water return water diversion structures and then is discharged from the water return channels, a complete closed loop is formed, and the modules 8 can be well cooled.
In the embodiment, each circulating module chain is provided with thirty-six modules 8, twelve water diversion saddles 2 are mounted on each annular hose 1, each water diversion saddle 2 is connected with a four-way joint, and one joint of each four-way joint is communicated with one module 8.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A water diversion structure, which is characterized in that,
the water distribution device comprises an annular hose (1) and a plurality of water distribution saddles (2) which are arranged along the circumferential direction of the annular hose (1); wherein,
the water diversion saddle (2) is hooped on the annular hose (1), and a water through hole is formed in the position, opposite to the water diversion saddle (2), of the annular hose (1) so as to be communicated with the water diversion saddle (2).
2. The water diversion structure according to claim 1,
the water distribution saddle is characterized by further comprising a multi-way joint (3) in one-to-one correspondence with the water distribution saddle (2), and one joint of the multi-way joint (3) is communicated with the corresponding water distribution saddle (2).
3. The water diversion structure according to claim 1,
the water-diversion saddle (2) comprises two subsections (21) and at least two locking bolts (22); wherein,
the branch parts (21) are provided with arc-shaped grooves, and the arc-shaped grooves of the two branch parts (21) form an encircling space encircling the annular hose (1) together;
the locking bolt (22) locks the two sections (21) such that the two sections (21) clamp the annular hose (1) together.
4. The water diversion structure according to claim 2,
the water distribution saddle (2) is provided with a screw inner hole (23), the water through hole is over against the screw inner hole (23), and one joint of the multi-way joint (3) is in threaded connection with the corresponding screw inner hole (23).
5. The water diversion structure according to claim 1,
and a sealing ring surrounding the circumference of the corresponding water through hole is arranged between the annular hose (1) and each water distribution saddle (2).
6. A rotary water distribution seat, which is characterized in that,
the water diversion structure is matched with the water diversion structure of any one of claims 1 to 5 for use, and comprises:
the device comprises an inner cylinder (4), wherein a chamber (41) or at least two chambers (41) which are separated from each other are arranged in the inner cylinder (4), and the inner cylinder (4) is also provided with inner water inlets and water outlets (42) which correspond to the chambers (41) one by one and are communicated with the corresponding chambers (41);
urceolus (5), urceolus (5) rotate to be installed outside inner tube (4), form a transfer chamber (51) or at least two transfer chamber (51) that separate each other between the internal perisporium of urceolus (5) and the periphery wall of inner tube (4), transfer chamber (51) with cavity (41) one-to-one links to each other cavity (41) through the intercommunicating pore intercommunication, urceolus (5) are equipped with transfer chamber (51) one-to-one and communicate outer inlet outlet (52) of corresponding transfer chamber (51).
7. The rotating water distribution seat according to claim 6,
the cavity (41) and the transfer cavity (51) are respectively provided with two.
8. The rotating water distribution seat according to claim 7,
the two chambers (41) are arranged in parallel in the horizontal direction, and the two transfer chambers (51) are arranged in parallel in the vertical direction.
9. The rotating water distribution seat according to claim 6,
a plurality of O-shaped rings (6) suitable for sealing the transfer cavity (51) are arranged between the inner circumferential wall of the outer cylinder (5) and the outer circumferential wall of the inner cylinder (4).
10. A mould cooling water circulation device for a double-wall corrugated pipe forming mould having a circulation module chain with a plurality of modules (8),
it includes:
two water diversion structures according to any one of claims 1 to 5, the endless hoses (1) of the two water diversion structures being connected to the circulating module chain so as to rotate synchronously therewith;
the rotary water diversion seat according to any one of claims 7 to 9, wherein the inner cylinder (4) of the rotary water diversion seat is fixedly installed at a fixed position of the double-wall corrugated pipe forming die, which is surrounded by the circulating module chain; wherein,
the two water diversion structures are respectively a water inlet water diversion structure and a water return water diversion structure, and two outer water inlets and water outlets (52) of the rotary water diversion seat are respectively an outer water inlet and an outer water return outlet;
a cooling water inlet of the module (8) is communicated with the corresponding water distribution saddle (2) of the water inlet water distribution structure, and a cooling water outlet is communicated with the corresponding water distribution saddle (2) of the water outlet water distribution structure;
the annular hose (1) of the water inlet water diversion structure is communicated with the outer water inlet to supply water to the outer water inlet, and the annular hose (1) of the water return water diversion structure is communicated with the outer water return port to discharge water through the outer water return port.
CN202111607254.6A 2021-12-27 2021-12-27 Water diversion structure, rotary water diversion seat and mold cooling water circulation device Active CN114055755B (en)

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CN202111607254.6A CN114055755B (en) 2021-12-27 2021-12-27 Water diversion structure, rotary water diversion seat and mold cooling water circulation device

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Application Number Priority Date Filing Date Title
CN202111607254.6A CN114055755B (en) 2021-12-27 2021-12-27 Water diversion structure, rotary water diversion seat and mold cooling water circulation device

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000180292A (en) * 1998-12-18 2000-06-30 Kubota Corp Evaluating method of metallic joint
JP2001304479A (en) * 2000-04-24 2001-10-31 Tabuchi Corp Seismic saddle type snap tap
CN202088438U (en) * 2011-06-17 2011-12-28 大连三垒机器股份有限公司 Water distribution base of plastic corrugated pipe forming machine and connection structure of water distribution base
CN203198201U (en) * 2013-05-02 2013-09-18 海宁市怡球塑业有限公司 Cooling device for injection mold on injection mold machine
CN106738789A (en) * 2016-12-22 2017-05-31 浙江双林机械股份有限公司 Plastic corrugated pipe molding machine cooling device
CN208859175U (en) * 2018-08-20 2019-05-14 广东联塑科技实业有限公司 A kind of water segregator
CN212097421U (en) * 2020-03-26 2020-12-08 大连三垒科技有限公司 Double-wall corrugated pipe forming machine suitable for high-speed production
CN216579145U (en) * 2021-12-27 2022-05-24 常州金纬国胜管道设备有限公司 Water diversion structure, rotary water diversion seat and mold cooling water circulation device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000180292A (en) * 1998-12-18 2000-06-30 Kubota Corp Evaluating method of metallic joint
JP2001304479A (en) * 2000-04-24 2001-10-31 Tabuchi Corp Seismic saddle type snap tap
CN202088438U (en) * 2011-06-17 2011-12-28 大连三垒机器股份有限公司 Water distribution base of plastic corrugated pipe forming machine and connection structure of water distribution base
CN203198201U (en) * 2013-05-02 2013-09-18 海宁市怡球塑业有限公司 Cooling device for injection mold on injection mold machine
CN106738789A (en) * 2016-12-22 2017-05-31 浙江双林机械股份有限公司 Plastic corrugated pipe molding machine cooling device
CN208859175U (en) * 2018-08-20 2019-05-14 广东联塑科技实业有限公司 A kind of water segregator
CN212097421U (en) * 2020-03-26 2020-12-08 大连三垒科技有限公司 Double-wall corrugated pipe forming machine suitable for high-speed production
CN216579145U (en) * 2021-12-27 2022-05-24 常州金纬国胜管道设备有限公司 Water diversion structure, rotary water diversion seat and mold cooling water circulation device

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