CN121061780B - Limiting lockset for production and processing of steel-plastic composite pipe - Google Patents
Limiting lockset for production and processing of steel-plastic composite pipeInfo
- Publication number
- CN121061780B CN121061780B CN202511614043.3A CN202511614043A CN121061780B CN 121061780 B CN121061780 B CN 121061780B CN 202511614043 A CN202511614043 A CN 202511614043A CN 121061780 B CN121061780 B CN 121061780B
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- rod
- composite pipe
- limiting
- circumferential surface
- connecting rod
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Abstract
本发明涉及限位锁具技术领域，具体公开了一种钢塑复合管生产加工用限位锁具，包括复合管，所述复合管的内部右侧滑动设置有垫片，垫片的数量为三个，垫片的左侧面均设置有气垫，气垫的外侧面和复合管的内部圆周面上贴合，通过“复合管的气垫、垫片、连接杆、卡紧环与限位杆，螺纹安装于连接杆的异形锁母，卡紧环左侧拉紧筒”的结构设计，解决“锁具无法同步限位与密封、密封差、复合管易偏移”的问题。具体是，三个垫片与气垫组成内部密封组件，柔性贴合复合管内壁，实现高效密封；配合连接杆与异形锁母轴向拉紧，强化密封，外部拉紧筒与内部密封组件形成“内外双重固定”结构，结合卡紧环与限位杆径向限位，限制复合管位移，保障复合加热精度。
This invention relates to the field of limit lock technology, specifically disclosing a limit lock for the production and processing of steel-plastic composite pipes. The lock includes a composite pipe, with three gaskets slidably disposed on the right side of its interior. Each gasket has an air cushion on its left side, and the outer surface of the air cushion is in contact with the inner circumference of the composite pipe. Through a structural design consisting of "air cushions, gaskets, connecting rods, clamping rings, and limit rods of the composite pipe; a threaded shaped lock nut on the connecting rod; and a tensioning cylinder on the left side of the clamping ring," the problem of "locks failing to simultaneously limit and seal, poor sealing, and easy displacement of the composite pipe" is solved. Specifically, the three gaskets and air cushions form an internal sealing assembly that flexibly conforms to the inner wall of the composite pipe, achieving efficient sealing. The connecting rod and the shaped lock nut are axially tightened to enhance the seal. The external tensioning cylinder and the internal sealing assembly form a "double-fixed" structure. Combined with the clamping ring and the limit rod for radial limiting, the displacement of the composite pipe is restricted, ensuring the accuracy of composite heating.
Description
Technical Field
The invention relates to the technical field of limiting locks, in particular to a limiting lock for producing and processing a steel-plastic composite pipe.
Background
In the steel-plastic composite pipe online production process, sealing and limiting are needed to be carried out on two ends of the composite pipe after the pipe penetrating process is finished, so that the stability and safety of processing links such as subsequent inflation pressure maintaining, composite heating and the like are ensured. At present, the production counting and processing are mainly finished by a compound machine in the industry, so that the problems of high electricity consumption and large accessory loss exist, and the matched limiting lockset has a plurality of technical defects.
The utility model provides a compound pipe, including compound pipe, inner wall plastic layer, the tool to lock is used for sealing, wherein, current tool to lock is difficult to realize the "seal+spacing" dual function of compound pipe simultaneously, and most structures can only press from both sides tightly from outside single direction, and unable adaptation compound pipe cavity just need avoid the characteristics of inner wall plastic layer damage, leads to sealed effect poor, and easy emergence gas leakage when aerifing the pressurize, and compound pipe easily takes place radial offset or axial float in processing simultaneously, influences compound heating precision.
Secondly, each subassembly of tool to lock cooperativity is not enough, and sealing member and spacing part are installed independently, need many times adjustment location, and the operation is troublesome and fixed stability is poor, especially in the processing scene that high frequency heating and cooling are alternating, easily lead to the tool to lock to become flexible because of vibrations, increase processing error.
In addition, the existing lockset lacks a flexible buffer design, the inner wall and the outer wall of the composite pipe are not easy to scratch due to rigid contact, the composite pipe with different diameter specifications cannot be adapted, the consumption and the production time of accessories can be further increased when the lockset is replaced, and the production requirement of cost reduction and synergy is contradicted.
Therefore, a limit lock for producing and processing the steel-plastic composite pipe is particularly provided.
Disclosure of Invention
The invention aims to provide a limit lock for producing and processing a steel-plastic composite pipe, so as to solve the problems in the background technology.
The limiting lockset for the production and processing of the steel-plastic composite pipe comprises a composite pipe, wherein gaskets are arranged on the right side of the inner part of the composite pipe in a sliding manner, the number of the gaskets is three, air cushions are arranged on the left side surfaces of the three gaskets, and the outer side surfaces of the air cushions are attached to the inner circumferential surface of the composite pipe;
Connecting rods are arranged from the inside of the gasket and the air cushion to the left side and the right side and extend to the outer sides of the composite pipes;
The right side of the composite pipe is provided with a clamping ring, the outer circumferential surface of the clamping ring is provided with a limiting rod, the right side of the limiting rod is provided with a special-shaped lock nut, and the special-shaped lock nut is rotatably arranged on the outer circumferential surface of the connecting rod;
The left side of chucking ring is provided with taut section of thick bamboo, the inboard periphery of taut section of thick bamboo and the outside periphery of compound pipe closely laminate.
Preferably, the inside of compound pipe is the cavity state, and its both ends are the state of lining up, the left end of connecting rod just is located the inside fixed mounting of compound pipe and has the limiting plate, the right flank of limiting plate and the left side laminating of the left side air cushion, the external screw thread has been seted up on the right-hand member of connecting rod just being located the outside periphery of compound pipe.
Preferably, the right end screw thread of connecting rod rotates and installs the external gas head, fixedly mounted with symmetrical state's knob piece on the left end outside periphery of external gas head, the knob piece is used for rotating the external gas head.
Preferably, a plurality of arc plates are uniformly and fixedly arranged on the annular array at the outer side of the left end of the tensioning cylinder, threaded holes are formed in the circumferential surface from the outer side to the inner side of each arc plate, locking screws are rotatably arranged in the threaded holes from the inner side to the outer side, and the inner ends of the locking screws are tightly attached to the circumferential surface of the outer side of the composite pipe.
Preferably, hexagonal screw holes are formed in one end of the outer side of the locking screw, stress holes are uniformly formed in the outer side surface of the tensioning cylinder to the inner side of the tensioning cylinder in an annular array mode, a pressing plate is fixedly mounted on the right end of the tensioning cylinder and located on the left end face of the clamping ring, the left side of the pressing plate is located in the composite pipe, and the left side of the pressing plate is attached to a gasket on the rightmost side inside the composite pipe.
Preferably, a through hole is formed from the left side surface to the right side surface of the center of the pressing plate, the through hole is in sliding connection with the connecting rod, and the left end and the right end of the connecting rod are located on the outer sides of the pressing plate and the clamping ring.
Preferably, the annular array on the outside periphery of chucking ring has evenly offered the U-shaped groove, the inside block in U-shaped groove has the gag lever post, the lateral surface fixed mounting of gag lever post has the spacing arc ring of symmetry state, the medial surface of spacing arc ring and chucking ring's left and right sides face laminating.
Preferably, a cavity groove is formed from the right side of the limiting rod to the inside of the limiting rod, a sliding rod is slidably mounted in the cavity groove, the left side of the sliding rod is located in the cavity groove, and a spring is fixedly mounted between the left side of the sliding rod and the left side of the inside of the cavity groove.
Preferably, a push rod is arranged on the inner side of the spring, and two ends of the push rod are respectively and fixedly arranged on the right end of the slide rod and the left side surface of the inner side of the cavity groove.
Preferably, the right-hand member outside of slide bar slides and is provided with the dwang, the right-hand member of dwang rotates installs special-shaped lock mother, the rotation mounting groove has all been seted up at the upper and lower both ends of special-shaped lock mother, rotate mounting groove and dwang rotation and connect, the installation screw hole has been seted up to right flank to the center left surface of special-shaped lock mother, installation screw hole and external screw thread rotate and connect.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention solves the problems that a lockset cannot synchronously seal and limit, has poor sealing and is easy to deviate by the structural design of an air cushion, a gasket, a connecting rod, a clamping ring and a limiting rod of a composite pipe, wherein the special-shaped locking nut is arranged on the connecting rod in a threaded manner, and a tensioning cylinder is arranged on the left side of the clamping ring. The inner sealing assembly is formed by the three gaskets and the air cushion, the inner wall of the composite pipe is flexibly attached to the inner wall of the composite pipe, efficient sealing is achieved, the connecting rod and the special-shaped lock nut are matched to axially tighten, sealing is enhanced, the outer tightening cylinder and the inner sealing assembly form an inner and outer double fixing structure, the clamping ring and the limiting rod are combined to radially limit, the displacement of the composite pipe is limited, the composite heating precision is guaranteed, the complex clamping structure of a traditional composite machine is not needed, and electricity consumption and accessory loss are reduced.
2. According to the invention, through the structures of the limiting plate attached to the leftmost air cushion at the left end of the connecting rod, the external thread at the right end of the connecting rod and the through hole in sliding connection with the connecting rod at the center of the pressing plate, the accurate collaborative operation of all components is realized. The limiting plate provides an initial positioning reference for the gasket and the air cushion, so that the parts are coaxial during installation, repeated adjustment is avoided, the through holes provide sliding guide for the connecting rods, and when the special-shaped lock nut is screwed, the connecting rods drive the gasket, the air cushion and the pressing plate to be linked, and the installation flow is simplified. Simultaneously, special-shaped lock nut passes through center installation screw hole and connecting rod external screw thread cooperation, accurate regulation and control tensioning dynamics, avoids sealing member damage or sealed inefficacy problem, promotes tool to lock use convenience and stability.
3. The flexible adaptation and loss reduction design is formed through the structure that the left end of the tensioning cylinder is provided with the arc plate with the threaded hole and is provided with the locking screw rod, the side surface of the tensioning cylinder is provided with the stress hole, and the outer side of the clamping ring is provided with the U-shaped groove clamping limit rod. On one hand, the locking screw rod can adjust the joint tightness with the outer side of the composite pipe through threads, adapt to the composite pipes with different diameters, does not need to change a whole set of lockset, reduces the consumption of accessories and the replacement time of equipment, on the other hand, the flexible sealing design of the air cushion avoids scratching the inner wall of the composite pipe, the stress hole of the tensioning cylinder disperses local stress, prevents the local stress from damaging the air cushion, improves the anti-vibration capability of the lockset under the scene of alternating high-frequency heating and cooling, reduces the loss of the accessories, and meets the production requirements of saving the consumption of the accessories and improving the efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly explain the drawings needed in the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a main block diagram of the present invention;
FIG. 2 is a schematic view of a composite tube and connecting rod of the present invention;
FIG. 3 is a block diagram of a shim and connecting rod of the present invention;
FIG. 4 is a schematic view of a take-up drum of the present invention;
FIG. 5 is a schematic view of a clamp ring and arcuate plate of the present invention;
FIG. 6 is a schematic view of a shaped lock nut and stop lever of the present invention;
FIG. 7 is a schematic view of a shaped lock nut of the present invention;
FIG. 8 is a schematic view of the stop lever, spring and slide bar of the present invention.
Reference numerals illustrate:
1. The device comprises a composite pipe, 2, a connecting rod, 3, a limiting plate, 4, an external thread, 5, an external gas joint, 6, a knob, 7, a gasket, 8, an air cushion, 9, a tensioning cylinder, 10, a stress hole, 11, a clamping ring, 12, a pressing plate, 13, a through hole, 14, a U-shaped groove, 15, an arc-shaped plate, 16, a threaded hole, 17, a locking screw, 18, a hexagonal screw hole, 19, a special-shaped locking nut, 20, an installation threaded hole, 21, a rotation installation groove, 22, a rotating rod, 23, a sliding rod, 24, a spring, 25, a push rod, 26, a limiting rod, 27, a cavity groove, 28 and a limiting arc-shaped ring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 8, the present invention provides a technical solution:
The utility model provides a steel is moulded compound pipe production and processing and is used spacing tool to lock, includes compound pipe 1, and wherein, compound pipe 1 need carry out the closure operation to both ends after the poling is accomplished, then aerifys, has the closure state at compound pipe 1's both ends design, as shown in figure 1.
The connecting rod 2 with a circular structure is arranged from the inside to the outside of the composite pipe 1, the limiting plate 3 is fixedly arranged on the left side of the connecting rod 2, the limiting plate 3 is positioned inside the composite pipe 1, then, the external thread 4 is arranged on the right end of the composite pipe 1 and on the outer circumferential surface of the composite pipe 1, and the external gas head 5 is rotatably arranged on the right end of the connecting rod 2 and on the right end thread of the external thread 4, as shown in fig. 2.
And a knob piece 6 in a symmetrical state is fixedly arranged on the outer left circumferential surface of the external gas joint 5, wherein in the using process, the knob piece 6 can be in threaded rotation connection with the external gas joint 5 on the connecting rod 2 through the external threads 4, and then the external gas joint 5 can be rotated, so that the external gas joint 5 is in a fixed state.
Three gaskets 7 are slidably arranged at the outer side of the left end of the connecting rod 2, and air cushions 8 are designed at the left side of each gasket 7, as shown in fig. 3, wherein the outer circumferential surface of each air cushion 8 and the inner circumferential surface of the composite pipe 1 are in a tightly attached state, the diameter of each gasket 7 is slightly smaller than the diameter of the inner wall of the composite pipe 1, and the leftmost air cushion 8 and the right side surface of the limiting plate 3 are in an attached state, so that in the subsequent use process, the air cushion 8 can be extruded along with the extrusion of the gaskets 7 and the limiting plate 3, and therefore, the air cushion 8 can seal the two ends of the composite pipe 1, as shown in fig. 2.
Secondly, the special-shaped lock nut 19 is rotatably mounted on the outer side of the connecting rod 2 and located on the outer side of the external thread 4, the special-shaped lock nut 19 can be rotatably connected with the connecting rod 2 through the external thread 4, the upper end and the lower end of the special-shaped lock nut 19 are provided with the rotary mounting grooves 21, the rotary rod 22 is rotatably mounted in the rotary mounting grooves 21, when the rotary rod 22 is horizontal, the sliding rod 23 is fixedly mounted on the left side of the rotary rod 22, the spring 24 is fixedly mounted on the left side of the sliding rod 23, and the push rod 25 is fixedly mounted on the inner side of the spring 24 and located on the left side of the sliding rod 23, as shown in fig. 7.
And a limiting rod 26 is arranged outside the left sides of the spring 24 and the push rod 25, a cavity groove 27 is formed from the right side surface to the inside of the limiting rod 26, the left sides of the spring 24 and the push rod 25 are fixedly arranged in the cavity groove 27, and a limiting arc-shaped ring 28 in a symmetrical state is fixedly arranged outside the limiting rod 26.
Therefore, in the use process, when the composite pipe 1 needs to be subjected to limit operation, the special-shaped lock nut 19 is rotatably arranged on the connecting rod 2 through the external thread 4, and along with the rotation of the special-shaped lock nut 19, after the special-shaped lock nut is rotated to a proper position, the rotating rod 22 is rotated at the moment, so that the rotating rod 22 is in a horizontal state, under the action of the spring 24, the push rod 25 can push the limit rod 26 to move outwards, and the limit arc ring 28 can move along with the limit rod and be clamped at the corresponding position, so that the subsequent plugging operation on the two ends of the composite pipe 1 is realized.
When the limit is required to be released, only the rotating rod 22 is required to be reversely rotated, so that the rotating rod 22 is not in a horizontal state any more, the elastic action of the spring 24 disappears, the limiting rod 26 is retracted under the action of the related structure, the limiting arc ring 28 leaves the clamping position, and the special-shaped lock nut 19 can be rotated and detached according to the requirement.
It should be noted that, the spring 24 generates an outward thrust, and the push rod 25 also generates an outward thrust, so that the slide rod 23 always generates a leftward thrust, thereby generating a leftward strong thrust for the subsequent structure, as shown in fig. 8.
The left side to the right side of the center of the special-shaped lock nut 19 are provided with mounting threaded holes 20, and the special-shaped lock nut 19 can be rotatably mounted on the outer circumferential surface of the connecting rod 2 by matching with the external threads 4 through the mounting threaded holes 20, as shown in fig. 1.
Next, a tension tube 9 is slidably mounted on the outer circumferential surface of the composite tube 1, and a cavity structure is provided in the tension tube 9, and both ends are in a penetrating state, and a plurality of transverse stress holes 10 are uniformly formed in an annular array from the outer circumferential surface to the inner circumferential surface of the tension tube 9, as shown in fig. 4.
The tensioning cylinder 9 can generate inward tightening force, so that the tensioning cylinder 9 generates inward tightening force on the structures at the two subsequent ends, the composite tube 1 is ensured to be stable in the processing process, and the composite tube is prevented from being deviated or deformed due to the action of external force. Meanwhile, the stress hole 10 is designed to enable the tensioning cylinder 9 to better disperse stress in the tightening process, damage caused by local stress concentration is avoided, and durability and reliability of the whole limiting lockset are improved.
The circular array is evenly and fixedly arranged on the outer circumferential surface of the left side of the tensioning cylinder 9, threaded holes 16 are formed in the outer circumferential surface of the circular plate 15 to the inner circumferential surface of the tensioning cylinder 9, locking screw rods 17 are rotatably arranged in the threaded holes 16, and hexagonal screw holes 18 are formed in the outer sides of the locking screw rods 17, as shown in fig. 5.
In the use process, when the composite pipe 1 needs to be more firmly limited, an operator can insert the hexagonal screw hole 18 through a tool and rotate the locking screw 17, so that the locking screw 17 rotates in the threaded hole 16 and gradually moves inwards.
Along with the extension of the locking screw 17, the end of the locking screw can be tightly contacted with the outer circumferential surface of the composite pipe 1 to generate larger friction force, so that the fixing effect of the tensioning cylinder 9 on the composite pipe 1 is further enhanced, and the condition that the tensioning cylinder 9 loosens or slides in the processing process is effectively prevented.
Moreover, as the arc-shaped plates 15 are uniformly and fixedly arranged on the left outer circumferential surface of the tensioning cylinder 9 in an annular array manner, the force applied on the composite tube 1 by the locking screw 17 is more uniform, and the stability and the reliability of the limiting lockset are further improved.
The right end of the tensioning cylinder 9 is fixedly provided with a clamping ring 11, the left side of the clamping ring 11 is fixedly provided with a pressing plate 12, the left side of the pressing plate 12 is slidingly arranged inside the composite pipe 1, and a through hole 13 is formed from the left side surface to the right side surface of the center of the pressing plate 12, wherein the connecting rod 2 penetrates through the through hole 13, as shown in fig. 1.
Then, the outer circumferential surface of the clamping ring 11 is uniformly provided with the U-shaped grooves 14 in an annular array, the U-shaped grooves 14 are slidably clamped with the limiting rods 26, the limiting rods 26 are in a fixed state when being matched with the limiting arc rings 28, and then the inner side surfaces of the limiting arc rings 28 and the left side surface and the right side surface of the clamping ring 11 are in a tightly attached state.
The left and right-most gaskets 7 of the pressing plate 12 are in a tightly bonded state, so that the gaskets 7 and the air cushion 8 are subjected to subsequent pressing operations.
Through the structure, in the using process, the special-shaped lock nut 19 and the clamping ring 11 can be in a connected state through the limiting rod 26, so that the plugging operation on the two ends of the composite pipe 1 is realized.
Working principle:
Firstly, the gasket 7 and the air cushion 8 are slidably arranged on the outer circumferential surface of the connecting rod 2 one by one according to the designed sequence, then the gasket 7 and the air cushion 8 are slidably arranged inside the composite tube 1 under the drive of the connecting rod 2,
Next, the tightening cylinder 9 is nested on the outer circumferential surface of the composite pipe 1, and then the hexagonal screw hole 18 is rotated by the hexagonal screw rod, so that one end of the inner side of the locking screw rod 17 and the outer circumferential surface of the composite pipe 1 are in a tightly attached state, and the tightening cylinder 9 is fixed.
At this time, the connecting rod 2 passes through the through hole 13 and is located outside the composite tube 1.
At this time, since the tensioning cylinder 9 generates a left pulling force and moves rightwards through the connecting rod 2, the clamping ring 11 is used for carrying the pressing plate 12 to slide leftwards, the pulling force generated by the pressing plate 12 can generate pressure on the gasket 7, the pressure generated by the gasket 7 can deform the air cushion 8, and the deformed air cushion 8 can seal the two ends of the interior of the composite pipe 1, so that the subsequent inflation operation is ensured.
Secondly, in subsequent operation, the special-shaped lock nut 19 needs to be rotationally arranged on the outer circumferential surface of the connecting rod 2 through the external thread 4, after the special-shaped lock nut rotates to a proper position, the rotating rod 22 rotates and is in a horizontal state, at the moment, the sliding rod 23 carries the limiting arc ring 28 to synchronously move, at the moment, the limiting rod 26 can be clamped in the U-shaped groove 14 under the driving of the sliding rod 23, and the inner side surfaces of the left limiting arc ring 28 and the right limiting arc ring 28 can be tightly attached to the left side surface and the right side surface of the clamping ring 11, so that the combination of the limiting rod 26 and the clamping ring 11 is realized.
Because spring 24 and push rod 25 can produce left stress to make gag lever post 26 take spacing arc ring 28 to left motion, thereby make gag lever post 26 can carry out the pushing operation to chucking ring 11, thereby make slide bar 23 can carry out the pushing operation to chucking ring 11, thereby realized further pushing operation, further improved the security of shutoff.
In addition, the tensioning cylinder 9 and the clamping ring 11 which are attached to the outer circumferential surface of the composite tube 1 are both provided with soft materials, so that the situation that the composite tube 1 is not ground or scratched is ensured.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511614043.3A CN121061780B (en) | 2025-11-06 | 2025-11-06 | Limiting lockset for production and processing of steel-plastic composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202511614043.3A CN121061780B (en) | 2025-11-06 | 2025-11-06 | Limiting lockset for production and processing of steel-plastic composite pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN121061780A CN121061780A (en) | 2025-12-05 |
| CN121061780B true CN121061780B (en) | 2026-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202511614043.3A Active CN121061780B (en) | 2025-11-06 | 2025-11-06 | Limiting lockset for production and processing of steel-plastic composite pipe |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2565012Y (en) * | 2002-08-09 | 2003-08-06 | 新兴铸管股份有限公司 | Special pressure testing device for steel-plastic composite pipe |
| CN1745928A (en) * | 2005-10-15 | 2006-03-15 | 新兴铸管股份有限公司 | Mechanical internal-expanding installation of steel plastic composite pressure pipe |
| CN209278719U (en) * | 2018-10-30 | 2019-08-20 | 天津市佳洁管业股份有限公司 | A kind of steel-plastics composite pipe end sealing device |
| CN215721476U (en) * | 2021-09-03 | 2022-02-01 | 吉林省浩浦净化工程有限公司 | Sealing structure of material conveying pipeline for pharmaceutical device |
-
2025
- 2025-11-06 CN CN202511614043.3A patent/CN121061780B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2565012Y (en) * | 2002-08-09 | 2003-08-06 | 新兴铸管股份有限公司 | Special pressure testing device for steel-plastic composite pipe |
| CN1745928A (en) * | 2005-10-15 | 2006-03-15 | 新兴铸管股份有限公司 | Mechanical internal-expanding installation of steel plastic composite pressure pipe |
| CN209278719U (en) * | 2018-10-30 | 2019-08-20 | 天津市佳洁管业股份有限公司 | A kind of steel-plastics composite pipe end sealing device |
| CN215721476U (en) * | 2021-09-03 | 2022-02-01 | 吉林省浩浦净化工程有限公司 | Sealing structure of material conveying pipeline for pharmaceutical device |
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| CN121061780A (en) | 2025-12-05 |
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