CN218468433U - PVC tubular product with acid and alkali-resistance protection device - Google Patents
PVC tubular product with acid and alkali-resistance protection device Download PDFInfo
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- CN218468433U CN218468433U CN202222790252.1U CN202222790252U CN218468433U CN 218468433 U CN218468433 U CN 218468433U CN 202222790252 U CN202222790252 U CN 202222790252U CN 218468433 U CN218468433 U CN 218468433U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A20/20—Controlling water pollution; Waste water treatment
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Abstract
The utility model discloses a PVC tubular product with acid and alkali-resistance protection device relates to PVC pipeline design technical field, including PVC pipeline main part, acid and alkali-resistance protection unit, linkage unit PVC pipeline main part both ends respectively with the unable adjustment base joint, two unable adjustment bases set up in acid and alkali-resistance protection unit, acid and alkali-resistance protection unit parcel PVC pipeline main part, the both ends of acid and alkali-resistance protection unit are provided with linkage unit acid and alkali-resistance protection unit and include double-deck acid and alkali-resistance protective housing, bond line, waterproof layer, double-deck enhancement pipeline, reinforced column, bonding glue and flame retardant coating, double-deck acid and alkali-resistance protective housing adopts bilayer structure, the position difference fixed connection unable adjustment base of both ends terminal surface between the bilayer structure inboard, the position difference fixed connection PVC pipeline main part's between two unable adjustment bases both ends, two pipe connection are convenient, correspond the acid and alkali-resistance improvement of device, tubular product life increases.
Description
Technical Field
The utility model relates to a PVC pipe design technical field specifically is a PVC tubular product with acid and alkali-resistance protection device.
Background
The PVC-U pipeline is made of sanitary polyvinyl chloride (PVC) resin as a main raw material, and a proper amount of stabilizer, lubricant, filler, toner and the like are added and are subjected to extrusion molding by a plastic extruder and injection molding by an injection molding machine, the PVC-U pipeline is the same as a drainage pipeline in length, and sewage generally has corrosivity, so that the PVC pipe with the acid-base resistant protection device is needed.
The existing PVC pipe with the acid and alkali resistant protection device has the defects that two pipelines are inconvenient to connect, the acid and alkali resistance of a corresponding device is poor, and the service life of the pipe is influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome current defect, provide a PVC tubular product with acid and alkali-resistance protection device, two pipe connection are convenient, and the acid and alkali resistance of corresponding device improves, and tubular product life increases, can effectively solve the problem in the background art.
In order to achieve the above object, the utility model provides a following technical scheme: a PVC pipe with an acid and alkali resistant protection device comprises a PVC pipe main body, an acid and alkali resistant protection unit and a connecting unit;
PVC pipeline main part: the two ends of the PVC pipeline are respectively clamped with the fixing bases, the two fixing bases are arranged in the acid and alkali resistant protection unit, the acid and alkali resistant protection unit wraps the PVC pipeline main body, and the two ends of the acid and alkali resistant protection unit are provided with connecting units;
acid and alkali resistant protection unit: the double-layer acid and alkali resistant protective shell comprises a double-layer acid and alkali resistant protective shell, an adhesive layer, a waterproof layer, a double-layer reinforcing pipeline, reinforcing columns, an adhesive glue and a fire-resistant layer, wherein the double-layer acid and alkali resistant protective shell is of a double-layer structure, the end faces of two ends between the inner sides of the double-layer structure are fixedly connected with fixing bases respectively, the two ends between the two fixing bases are fixedly connected with the two ends of a PVC pipeline main body respectively, the upper side and the lower side of the waterproof layer are provided with the adhesive layer respectively, the position between the PVC pipeline main body and the inner layer of the double-layer reinforcing pipeline is provided with the waterproof layer, the two adhesive layers are fixedly connected with one side between the inner wall of the double-layer acid and alkali resistant protective shell and the PVC pipeline main body respectively, the double-layer reinforcing pipeline is fixedly clamped between the PVC pipeline main body and the outer wall of the double-layer acid and alkali resistant protective shell, the reinforcing columns are filled with the reinforcing columns in an annular array, all the reinforcing columns are fixedly connected with the outer wall of the double-layer reinforcing pipeline through the adhesive glue and the fire-resistant layer, and the corresponding inner layer of the double-layer reinforcing pipeline are fixedly clamped.
PVC pipeline main part is used with strutting arrangement, unable adjustment base is used for fixing PVC pipeline main part, the linkage unit is used for letting a plurality of pipelines connect, bilayer acid and alkali-resistance protective housing adopts the phenol formaldehyde vinyl resin material, come to be anticorrosive to the pipeline, the bond line is used for letting the waterproof layer fix on the pipeline, prevent that water from oozing, the waterproof layer adopts chloroprene rubber, come to waterproof, prevent the infiltration, bilayer is strengthened the pipeline and is adopted the rigidity material with the enhancement post, increase pipeline strength, the adhesive is used for fixed flame retardant coating, the flame retardant coating adopts the heat-insulating shield material, increase the device stability, increase the life-span of pipeline with this, increase live time.
Furthermore, the acid and alkali resistant protection unit further comprises an acid and alkali resistant coating, and the acid and alkali resistant coating is coated on the outer side surface of the inner wall of the double-layer acid and alkali resistant protection shell.
The acid and alkali resistant coating adopts Teflon coating to prevent the inside of the pipe from being corroded, so that the acid and alkali resistant function of the device is improved.
Further, the linkage unit includes connecting tube, sealing strip one, seal groove two, seal groove one and sealing strip two, seal groove one has been seted up to the left side terminal surface of double-deck acid and alkali-resistant protective housing, the right-hand member terminal surface fixed connection sealing strip two of double-deck acid and alkali-resistant protective housing, the both sides of double-deck acid and alkali-resistant protective housing are provided with the connecting tube respectively, wherein correspond one side fixed connection sealing strip one of connecting tube with seal groove one, sealing strip one and the seal groove joint that corresponds, another connecting tube has seted up seal groove two respectively with one side that sealing strip two correspond, sealing strip two corresponds the joint with the seal groove that corresponds. The joints of the two connecting pipelines and the corresponding double-layer acid-alkali-resistant protective shell are respectively fixedly connected with a sealing clamping ring.
The connecting pipeline is used for facilitating connection of two pipes, the first sealing strip and the sealing groove are correspondingly clamped to enable the connecting pipeline to be fixed at one end of the pipes, and the second sealing groove and the second sealing strip are clamped to enable the connecting pipeline to be fixed at the other end of the pipes, so that the connecting pipeline is convenient to connect, and a plurality of pipes are connected.
Further, the linkage unit still contains internal thread and external screw thread, rubber seal ring and solid fixed ring, and the internal thread has been seted up to the inboard position of one of them connecting tube, and the external screw thread has been seted up to one side that double-deck acid and alkali-resistance protective housing was kept away from in another connecting tube outside, the internal thread of connecting tube is through the external screw thread threaded connection with connecting tube on another double-deck acid and alkali-resistance protective housing, and the position that one of them connecting tube lies in between external screw thread and the double-deck acid and alkali-resistance protective housing and the position that one end of double-deck acid and alkali-resistance protective housing was kept away from to another connecting tube fix joint rubber seal ring respectively, and the rubber seal ring on two connecting tubes passes through solid fixed ring fixed connection.
Internal thread and external screw thread threaded connection let two PVC tubular products connect, and the rubber seal ring is used for preventing that water from oozing from the junction, and solid fixed ring is used for letting two PVC tubular products connect more firmly to this connects extension tubular product.
Further, still include the protective layer, the double-deck acid and alkali-resistance protective housing outside surface fixation cup joints the protective layer.
The protective layer adopts chromium carbide composite material, improves the device stability, makes PVC tubular product more firm.
Furthermore, the protective layer also comprises wear-resistant patterns, and the outer side surface of the protective layer is provided with the wear-resistant patterns.
The wear-resistant patterns are used for improving the stability of the pipe, so that the time of the PVC pipe is prolonged, and the service life of the PVC pipe is prolonged.
Compared with the prior art, the beneficial effects of the utility model are that:
1. this acid and alkali-resistant protection device's PVC tubular product has following benefit: the connecting unit is arranged and used for facilitating connection of two pipes through a connecting pipeline, the first sealing strip and the second sealing strip are correspondingly clamped and connected to enable the connecting pipeline to be fixed at one end of the pipe, the second sealing strip is clamped and connected to enable the connecting pipeline to be fixed at the other end of the pipe, the connecting pipeline is fixed, the internal thread and the external thread are in threaded connection to enable the two PVC pipes to be connected, the rubber sealing ring is used for preventing water from seeping out of the connecting position, and the fixing ring is used for enabling the two PVC pipes to be connected more firmly to enable the multi-heel pipe to be connected;
2. this acid and alkali-resistant protection device's PVC tubular product has following benefit: the anti-acid and alkali protection device is characterized in that an acid and alkali protection unit is arranged, the pipeline is prevented from being corroded by the aid of a phenolic vinyl resin material of a double-layer acid and alkali protection shell, a bonding layer is used for fixing a waterproof layer on the pipeline to prevent water seepage, the waterproof layer is made of chloroprene rubber to prevent water seepage, the double-layer reinforced pipeline and a reinforcing column are made of rigid materials to increase pipeline strength, adhesive glue is used for fixing a fire-resistant layer, the fire-resistant layer is made of a heat-insulating plate to increase device stability, and a Teflon coating is used for an acid and alkali resistance coating to prevent corrosion inside the pipeline and increase acid and alkali resistance of the device;
3. this acid and alkali-resistant protection device's PVC tubular product has following benefit: two pipelines are convenient to connect, the acid and alkali resistance of the corresponding device is improved, and the service life of the pipe is prolonged.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic view of a partial cross-sectional structure of the connecting pipe according to the present invention;
FIG. 3 is a schematic view of a partial sectional structure of the acid and alkali resistant protection unit of the present invention;
fig. 4 is the schematic view of the sectional structure of the double-layer reinforced pipeline of the present invention.
In the figure: the novel PVC sealing ring comprises a PVC pipeline main body, a fixing base 2, an acid and alkali resistant protection unit 3, a double-layer acid and alkali resistant protection shell 31, a bonding layer 32, a waterproof layer 33, a double-layer reinforcing pipeline 34, a reinforcing column 35, bonding glue 36, a flame retardant coating 37, an acid and alkali resistant coating 38, a connecting unit 4, a connecting pipeline 41, a rubber sealing ring 42, a fixing ring 43, a first sealing strip 44, a second sealing groove 45, an internal thread 46, an external thread 47, a first sealing groove 48, a second sealing strip 49, a protective layer 5 and a wear-resistant pattern 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present embodiment provides a technical solution: a PVC pipe of an acid and alkali resistant protection device comprises a PVC pipe main body 1, an acid and alkali resistant protection unit 3 and a connecting unit 4;
PVC pipeline main body 1: two ends of the fixing base are respectively clamped with the fixing bases 2, the two fixing bases 2 are arranged in the acid and alkali resistant protection unit 3, the acid and alkali resistant protection unit 3 wraps the PVC pipeline main body 1, and the connecting units 4 are arranged at two ends of the acid and alkali resistant protection unit 3;
acid and alkali resistant protection unit 3: include double-deck acid and alkali-resistance protective housing 31, bond line 32, waterproof layer 33, double-deck reinforcing pipe 34, reinforcement post 35, bonding glue 36 and flame retardant coating 37, double-deck acid and alkali-resistance protective housing 31 adopts bilayer structure, the position of both ends terminal surface is fixed connection unable adjustment base 2 respectively between the bilayer structure inboard, the position difference fixed connection PVC pipeline main part 1's both ends between two unable adjustment base 2, the upper and lower side of waterproof layer 33 is provided with bond line 32 respectively, the position between PVC pipeline main part 1 and the double-deck reinforcing pipe 34 inlayer is provided with waterproof layer 33, two bond lines 32 respectively with double-deck acid and alkali-resistance protective housing 31 inner wall and one side fixed connection between PVC pipeline main part 1, the double-deck reinforcing pipe 34 of position fixing joint between PVC pipeline main part 1 and the double-deck acid and alkali-resistance protective housing 31 outer wall, double-deck reinforcing pipe 34 intussuseption is filled with annular array's reinforcement post 35, all reinforcement posts 35 are the both ends in the double-deck reinforcing pipe 34 of fixed connection respectively, the outer surface of double-deck reinforcing pipe 34 passes through bonding glue 36 and flame retardant coating 37 fixed connection, double-layer 37 fixed joint with the outer fixed joint of double-deck reinforcing pipe 34 that corresponds.
PVC pipeline main part 1 is used with strutting arrangement, unable adjustment base 2 is used for fixing PVC pipeline main part 1, linkage unit 4 is used for letting a plurality of pipelines connect, double-deck acid and alkali-resistance protective housing 31 adopts the phenol-formaldehyde vinyl resin material, come to be anticorrosive to the pipeline, bond line 32 is used for letting waterproof layer 33 fix on the pipeline, prevent that water from oozing, waterproof layer 33 adopts chloroprene rubber, it is waterproof to come, prevent the infiltration, pipeline 34 and reinforcing column 35 adopt the rigidity material to strengthen double-deck, increase pipeline strength, bond glue 36 is used for fixed flame retardant coating 37, flame retardant coating 37 adopts the heat-insulating board material, increase device stability, with this life-span that increases the pipeline, increase live time.
The acid and alkali resistant protection unit 3 further comprises an acid and alkali resistant coating 38, and the acid and alkali resistant coating 38 is coated on the outer side surface of the inner wall of the double-layer acid and alkali resistant protection shell 31.
The acid and alkali resistant coating 38 is made of Teflon coating to prevent the inside of the pipe from being corroded and increase the acid and alkali resistance of the device.
Connecting unit 4 includes connecting tube 41, sealing strip 44, seal groove two 45, seal groove 48 and sealing strip two 49, seal groove 48 has been seted up to the left side terminal surface of double-deck acid and alkali-resistant protective housing 31, double-deck acid and alkali-resistant protective housing 31's right-hand member terminal surface fixed connection sealing strip two 49, double-deck acid and alkali-resistant protective housing 31's both sides are provided with connecting tube 41 respectively, wherein correspond one side fixed connection sealing strip 44 of connecting tube 41 with seal groove 48, sealing strip 44 and the first 48 joints of seal groove that correspond, seal groove two 45 have been seted up respectively to another connecting tube 41 and the one side that seal strip two 49 correspond, sealing strip two 49 and the second 45 joints that correspond of seal groove that correspond. The joints of the two connecting pipelines 41 and the corresponding double-layer acid and alkali resistant protective shell 31 are respectively fixedly connected with a sealing clamping ring.
Connecting tube 41 is used for making things convenient for two tubular product to connect, and sealing strip one 44 and the corresponding joint of sealing groove one 48 let connecting tube 41 fix the one end at tubular product, and sealing groove two 45 and two 49 joints of sealing strip let connecting tube 41 fix at the tubular product other end to this is conveniently connected, comes to connect a plurality of tubular products.
The coupling unit 4 still contains internal thread 46 and external screw thread 47, rubber seal ring 42 and solid fixed ring 43, internal thread 46 has been seted up to the inboard position of one of them connecting tube 41, the external screw thread 47 has been seted up to one side that double-deck acid and alkali-resistance protective housing 31 was kept away from in another connecting tube 41 outside, the internal thread 46 of connecting tube 41 is through the external screw thread 47 threaded connection with connecting tube 41 on another double-deck acid and alkali-resistance protective housing 31, the position that one of them connecting tube 41 is located between external screw thread 47 and the double-deck acid and alkali-resistance protective housing 31 and the position that double-deck acid and alkali-resistance protective housing 31's one end was kept away from to another connecting tube 41 are fixed joint rubber seal ring 42 respectively, rubber seal ring 42 on two connecting tube 41 is through solid fixed ring 43 fixed connection.
Still include protective layer 5, double-deck acid and alkali-resistance protective housing 31 outside surface fixation cup joints protective layer 5.
The protective layer 5 is made of chromium carbide composite materials, so that the stability of the device is improved, and the PVC pipe is firmer.
Still include wear-resisting decorative pattern 6, the wear-resisting decorative pattern 6 has been seted up on the outside surface of protective layer 5.
The wear-resistant patterns 6 are used for improving the stability of the pipe, so that the time of the PVC pipe is prolonged, and the service life of the PVC pipe is prolonged.
The utility model provides a pair of acid and alkali-resistance protection device's PVC tubular product's theory of operation as follows: firstly, the pipeline is prevented from being corroded by adopting a phenolic vinyl resin material through the double-layer acid and alkali resistant protective shell 31, the bonding layer 32 is used for fixing the waterproof layer 33 on the pipeline to prevent water seepage, the waterproof layer 33 is made of chloroprene rubber to prevent water seepage, the double-layer reinforced pipeline 34 and the reinforced column 35 are made of rigid materials to increase the pipeline strength, the adhesive glue 36 is used for fixing the fireproof layer 37, the fireproof layer 37 is made of a heat insulation plate material to increase the stability of the device, the acid and alkali resistant coating 38 is made of Teflon coating to prevent the internal corrosion of the pipeline and increase the acid and alkali resistance of the device, the connecting pipeline 41 is used for facilitating the connection of two pipes through the connecting pipeline 41, the first sealing strip 44 and the first sealing groove 48 are correspondingly clamped to enable the connecting pipeline 41 to be fixed at one end of the pipe, the second sealing strip 45 and the second sealing strip 49 are clamped to enable the connecting pipeline 41 to be fixed at the other end of the pipe, the connecting pipeline 41 is fixedly connected with the internal thread 46 and the external thread 47 to connect the two PVC pipes, the rubber sealing ring 42 is used for preventing water seepage from the connection, the fixing ring 43 is used for enabling the connection of the two PVC pipes to be more firmly, the multi-heel pipe material to increase the stability of the composite pattern 6, and the stability of the PVC pipe.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a PVC tubular product with acid and alkali-resistance protection device which characterized in that: comprises a PVC pipeline main body (1), an acid and alkali resistant protection unit (3) and a connecting unit (4);
PVC pipe body (1): the two ends of the PVC pipeline are respectively clamped with the fixing bases (2), the two fixing bases (2) are arranged in the acid and alkali resistant protection unit (3), the acid and alkali resistant protection unit (3) wraps the PVC pipeline main body (1), and the two ends of the acid and alkali resistant protection unit (3) are provided with the connecting units (4);
acid and alkali resistant protection unit (3): comprises a double-layer acid-alkali resistant protective shell (31), an adhesive layer (32), a waterproof layer (33), a double-layer reinforced pipeline (34), a reinforced column (35), adhesive glue (36) and a fireproof layer (37), the double-layer acid and alkali resistant protective shell (31) adopts a double-layer structure, the end surfaces of two ends between the inner sides of the double-layer structure are respectively and fixedly connected with the fixed bases (2), the position between the two fixed bases (2) is respectively and fixedly connected with two ends of the PVC pipeline main body (1), the upper side and the lower side of the waterproof layer (33) are respectively provided with an adhesive layer (32), a waterproof layer (33) is arranged between the PVC pipeline main body (1) and the inner layer of the double-layer reinforced pipeline (34), two bonding layers (32) are respectively fixedly connected with one side between the inner wall of the double-layer acid and alkali resistant protective shell (31) and the PVC pipeline main body (1), the position between the PVC pipeline main body (1) and the outer wall of the double-layer acid and alkali resistant protective shell (31) is fixedly clamped with the double-layer reinforced pipeline (34), the double-layer reinforced pipeline (34) is internally filled with reinforced columns (35) in an annular array, all the reinforced columns (35) are respectively and fixedly connected with two ends in the double-layer reinforced pipeline (34), the outer layer surface of the double-layer reinforced pipeline (34) is fixedly connected with a fire-resistant layer (37) through an adhesive (36), the fire-resistant layer (37) is fixedly clamped with the inner wall of the outer layer of the corresponding double-layer reinforced pipeline (34).
2. The PVC pipe with the acid and alkali resistant protection device according to claim 1, is characterized in that: the acid and alkali resistant protection unit (3) further comprises an acid and alkali resistant coating (38), and the acid and alkali resistant coating (38) is coated on the outer side surface of the inner wall of the double-layer acid and alkali resistant protection shell (31).
3. The PVC pipe with the acid and alkali resistant protection device according to claim 1, is characterized in that: the connecting unit (4) includes connecting tube (41), sealing strip one (44), sealing groove two (45), sealing groove one (48) and sealing strip two (49), sealing groove one (48) have been seted up to the left side terminal surface of double-deck acid and alkali-resistant protective housing (31), the right-hand member terminal surface fixed connection sealing strip two (49) of double-deck acid and alkali-resistant protective housing (31), the both sides of double-deck acid and alkali-resistant protective housing (31) are provided with connecting tube (41) respectively, wherein correspond one side fixed connection sealing strip (44) of connecting tube (41) with sealing groove one (48), sealing groove two (45) have been seted up respectively to one side that another connecting tube (41) and sealing strip two (49) correspond, sealing strip two (49) correspond the joint with sealing groove two (45) that correspond, two connecting tube (41) and the junction that corresponds double-deck acid and alkali-resistant protective housing (31) are fixed connection seal joint ring respectively.
4. The PVC pipe with the acid and alkali resistant protection device according to claim 1, is characterized in that: the connecting unit (4) still contain internal thread (46) and external screw thread (47), rubber sealing ring (42) and solid fixed ring (43), internal thread (46) have been seted up to the position of one of them connecting tube (41) inboard, and external screw thread (47) have been seted up to one side that double-deck acid and alkali-resistance protective housing (31) was kept away from in another connecting tube (41) outside, the external screw thread (47) threaded connection of connecting tube (41) is gone up through with another double-deck acid and alkali-resistance protective housing (31) in internal thread (46) of connecting tube (41), and the position that the one end of double-deck acid and alkali-resistance protective housing (31) was kept away from in position between one of them connecting tube (41) and double-deck acid and alkali-resistance protective housing (31) and another connecting tube (41) is fixed joint rubber sealing ring (42) respectively, and rubber sealing ring (42) on two connecting tubes (41) are through solid fixed ring (43) fixed connection.
5. The PVC pipe with the acid and alkali resistant protection device according to claim 1, is characterized in that: the protective layer (5) is further included, and the protective layer (5) is fixedly sleeved on the outer side surface of the double-layer acid and alkali resistant protective shell (31).
6. The PVC pipe with the acid and alkali resistant protection device according to claim 5, characterized in that: the wear-resistant protective layer is characterized by further comprising wear-resistant patterns (6), wherein the wear-resistant patterns (6) are arranged on the outer side surface of the protective layer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222790252.1U CN218468433U (en) | 2022-10-21 | 2022-10-21 | PVC tubular product with acid and alkali-resistance protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222790252.1U CN218468433U (en) | 2022-10-21 | 2022-10-21 | PVC tubular product with acid and alkali-resistance protection device |
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| Publication Number | Publication Date |
|---|---|
| CN218468433U true CN218468433U (en) | 2023-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222790252.1U Active CN218468433U (en) | 2022-10-21 | 2022-10-21 | PVC tubular product with acid and alkali-resistance protection device |
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| Country | Link |
|---|---|
| CN (1) | CN218468433U (en) |
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- 2022-10-21 CN CN202222790252.1U patent/CN218468433U/en active Active
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