Necking machine
By designing a neck shrinker, it gradually reduces the outer diameter of the ultra-high molecular weight polyethylene lined tube by using rolling technology, and combines the swing clamping mechanism, the difficulty of pipe insertion and fixation is solved, and the insertion convenience and bonding tightness are improved. .
Patent Information
- Application Number
- CN202421202163.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-29
AI Technical Summary
When the ultra-high molecular weight polyethylene lined tube is inserted into the steel tube, it is difficult to insert the outer diameter too large, and it is too small to fix the bond, resulting in difficulty in inserting and bonding.
A neck shrinking machine is designed, including a diameter shrinking unit arranged side by side, gradually shrinking the outer diameter of the tube using the rolling technology of the first roller and the second roller, and ensuring the insertion and fixation of the pipe through a swinging clamping mechanism.
The convenience of inserting ultra-high molecular weight polyethylene lined tube into steel pipes is improved, and the close integration with the steel pipes is achieved through rolling rebound.
Smart Images
Figure CN222329099U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of composite pipes, and in particular relates to a necking machine. Background Art
[0002] An ultra-high molecular weight polyethylene lined composite pipe refers to an ultra-high molecular weight polyethylene lined pipe arranged inside a steel pipe, wherein the steel pipe serves as an outer sleeve. The ultra-high molecular weight polyethylene lined pipe is generally prepared by an extrusion process. After the ultra-high molecular weight polyethylene lined pipe is prepared, the ultra-high molecular weight polyethylene lined pipe needs to be inserted into the steel pipe. If the outer diameter of the ultra-high molecular weight polyethylene lined pipe is too large, it is not easy to insert into the steel pipe. If the outer diameter of the ultra-high molecular weight polyethylene lined pipe is too small, it cannot be fixedly combined with the steel pipe. Therefore, how to conveniently insert the ultra-high molecular weight polyethylene lined pipe into the steel pipe and achieve fixed combination of the ultra-high molecular weight polyethylene lined pipe and the steel pipe is a technical problem to be solved in this field. Utility Model Content
[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a necking machine to facilitate the insertion of the ultra-high molecular weight polyethylene liner pipe into the steel pipe and to achieve fixed combination of the ultra-high molecular weight polyethylene liner pipe and the steel pipe.
[0004] The utility model provides a necking machine, comprising a frame, on which a plurality of necking units are arranged side by side along the moving direction of the tube to be necked;
[0005] Each diameter reduction unit includes a first roller and a second roller arranged side by side, and the axis of the first roller is arranged parallel to the axis of the second roller, the first roller is drivingly connected to the second roller, the outer circumference of the first roller is provided with a first arc groove, the outer circumference of the second roller is provided with a second arc groove, the arc boundary of the first arc groove and the arc boundary of the second arc groove on the side where the first roller and the second roller are close to each other form a diameter reduction channel, the arc boundary of the first arc groove and the arc boundary of the second arc groove are concentrically arranged, and the radius is equal;
[0006] The axes of the first rollers in adjacent diameter reducing units are arranged to intersect;
[0007] Along the moving direction of the reduced diameter tube, the reduced diameter channel of each reduced diameter unit is reduced in sequence.
[0008] As an implementable manner, the central angle of each of the arc-shaped boundaries is α, 90°≤α≤170°.
[0009] As an implementable manner, axes of the first rollers in adjacent diameter reduction units are perpendicular to each other.
[0010] As an implementable manner, the frame includes a first mounting surface and a second mounting surface, the first mounting surface is vertically arranged to the second mounting surface, and of any two adjacent reducing units, one is fixed to the first mounting surface, and the other is fixed to the second mounting surface.
[0011] As an achievable method, each of the reducing units includes a mounting seat, to which two mutually parallel lateral support members are fixedly connected, the first roller is rotatably connected between the two lateral support members, both ends of the second roller are rotatably connected to sliding seats, each sliding seat is slidably matched with the corresponding lateral support member, and a positioning member is fixedly connected to the side of each lateral support member facing away from the mounting seat, an adjusting bolt is threaded on the positioning member, and the adjusting bolt is threadedly connected to the sliding seat.
[0012] As an implementable manner, one of the first roller and the second roller in each of the diameter reduction units is connected to a driving motor.
[0013] As an implementable manner, the first roller and the second roller are connected in transmission via a gear mechanism, a belt transmission mechanism or a chain transmission mechanism.
[0014] As an implementable manner, a swing clamping mechanism is provided on one side of the frame along the moving direction of the reduced diameter tube, and the swing clamping mechanism is used to clamp the outer sleeve to insert the reduced diameter tube into the outer sleeve.
[0015] As an achievable method, the swing clamping mechanism includes two claws and a claw mounting seat, each of the claws is rotatably cooperated with the claw mounting seat, and a linear drive is connected between each of the claws and the claw mounting seat, and each of the linear drives is used to drive the corresponding claw to rotate so as to clamp or release the outer sleeve.
[0016] As an implementable manner, each of the clamping claws includes a rotating connection portion and a clamping portion and a driving portion located on both sides of the rotating connection portion, the rotating connection portion is rotationally matched with the clamping claw mounting seat, and the driving portion is connected to the linear drive.
[0017] The above scheme can reduce the diameter of the reduced-diameter pipe, such as an ultra-high molecular weight polyethylene liner pipe, and then insert the ultra-high molecular weight polyethylene liner pipe after the reduction treatment into the outer sleeve (such as a steel pipe). Since it is inserted into the outer sleeve after the reduction treatment, the convenience of inserting the ultra-high molecular weight polyethylene liner pipe into the outer sleeve is improved. In addition, the ultra-high molecular weight polyethylene liner pipe is reduced in diameter by rolling with a first roller and a second roller. After the rolling pressure of the first roller and the second roller is removed, the ultra-high molecular weight polyethylene liner pipe will slowly rebound so as to be tightly combined with the inner wall of the outer sleeve, thereby realizing the fixed combination of the ultra-high molecular weight polyethylene liner pipe and the outer sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:
[0019] Figure 1 A front view of a necking machine provided by an embodiment of the utility model;
[0020] Figure 2 for Figure 1 A top view of
[0021] Figure 3 for Figure 1 Stereoscopic image of
[0022] Figure 4 for Figure 1 A three-dimensional image from another angle;
[0023] Figure 5 It is the front view of the reduction unit;
[0024] Figure 6 for Figure 5 Stereoscopic diagram. DETAILED DESCRIPTION
[0025] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.
[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0027] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.
[0028] First, some terms involved in this utility model are explained:
[0029] Ultra-high molecular weight polyethylene (UHMWPE) refers to unbranched linear polyethylene with a molecular weight of more than 1.5 million.
[0030] The ultra-high molecular weight polyethylene lined composite pipe refers to a liner pipe made of ultra-high molecular weight polyethylene arranged inside a steel pipe, that is, an ultra-high molecular weight polyethylene lined pipe; and the ultra-high molecular weight polyethylene lined pipe is integrated with the steel pipe by interference fit to form a composite pipe.
[0031] Among them, the ultra-high molecular weight polyethylene liner pipe is generally prepared by an extrusion process. Before extrusion, it is generally necessary to mix the powdered materials. The powdered materials include ultra-high molecular weight polyethylene, high-density polyethylene, silicon nitride, talcum powder, PE wax and masterbatch.
[0032] like Figure 1-Figure 6 As shown, the necking machine provided by the utility model comprises a frame 1, on which a plurality of necking units 6 are arranged side by side along the moving direction of the tube 2 to be necked.
[0033] Generally, the number of the reduction units 6 can be determined according to the reduction amount of the reduced tube 2. The greater the reduction amount, the more reduction units 6 are used. In this example, four reduction units 6 are used.
[0034] In this example, the reduced diameter pipe 2 is an ultra-high molecular weight polyethylene lined pipe, which is used to reduce the diameter of the ultra-high molecular weight polyethylene lined pipe and then insert it into the outer sleeve 5 (steel pipe) to form an ultra-high molecular weight polyethylene lined composite pipe.
[0035] Each reducing unit 6 includes a first roller 61 and a second roller 62 arranged side by side, and the axis of the first roller 61 is arranged parallel to the axis of the second roller 62, the first roller 61 is transmission-connected with the second roller 62, the outer circumferential surface of the first roller 61 is provided with a first circular arc groove 65, and the outer circumferential surface of the second roller 62 is provided with a second circular arc groove 64, the arc boundary of the first circular arc groove 65 and the arc boundary of the second circular arc groove 64 on the side where the first roller 61 and the second roller 62 are close to each other form a reducing channel 66, the arc boundary of the first circular arc groove 65 and the arc boundary of the second circular arc groove 64 are concentrically arranged, and have the same radius.
[0036] When the reduced diameter tube 2 passes through the reduced diameter channel 66 , it is rolled by the first roller 61 and the second roller 62 , and its radial dimension is reduced accordingly.
[0037] The axes of the first rollers 61 in adjacent diameter-reducing units 6 are arranged to intersect.
[0038] By arranging the axes of the first rollers 61 in adjacent reducing units 6 to intersect, the surface of the reduced tube 2 that has not been rolled in one reducing unit 6 can be rolled in the next reducing unit 6. In this way, the entire outer circumferential surface of the reduced tube 2 can be rolled, avoiding poor reduction caused by only part of the surface being rolled while the rest is not rolled.
[0039] The diameter reduction passages 66 of the diameter reduction units 6 are reduced in sequence along the moving direction of the reduced diameter tube 2. Thus, after the reduced diameter tube 2 passes through the diameter reduction units 6 in sequence, its outer diameter is reduced in sequence until it reaches the target size.
[0040] The above scheme can reduce the diameter of the reduced diameter pipe 2, such as an ultra-high molecular weight polyethylene liner tube, and then insert the ultra-high molecular weight polyethylene liner tube after the reduction treatment into the outer sleeve 5 (such as a steel pipe). Since it is inserted into the outer sleeve 5 after the reduction treatment, the convenience of inserting the ultra-high molecular weight polyethylene liner tube into the outer sleeve 5 is improved. In addition, the ultra-high molecular weight polyethylene liner tube is reduced in diameter by rolling by the first roller 61 and the second roller 62. After the rolling pressure of the first roller 61 and the second roller 62 is removed, the ultra-high molecular weight polyethylene liner tube will slowly rebound so as to be tightly combined with the inner wall of the outer sleeve 5, thereby realizing the fixed combination of the ultra-high molecular weight polyethylene liner tube and the outer sleeve 5.
[0041] As an implementable manner, the center angle of each arc-shaped boundary is α, 90°≤α≤170°. Preferably, the range of the center angle is 120°≤α≤160°. For example, but not limited to, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 155°, etc. With the above center angle range, after the reduced tube 2 passes through a reducing unit 6, the surface that can be rolled at a time is large enough, and the seal is damaged to the reduced tube 2 due to a single rolling surface that is too small.
[0042] As an implementable manner, axes of the first rollers 61 in adjacent diameter-reducing units 6 are perpendicular to each other.
[0043] By setting the axes of the first rollers 61 in adjacent reducing units 6 to be perpendicular to each other and the center angle being within the above range, it can be ensured that after the reduced tube 2 passes through two adjacent reducing units 6, its entire outer circumference can be rolled to ensure the roundness of its outer circumference.
[0044] As an implementable manner, the frame includes a first mounting surface 11 and a second mounting surface 12, the first mounting surface 11 and the second mounting surface 12 are vertically arranged, and among any two adjacent reducing units 6, one is fixed to the first mounting surface 11 and the other is fixed to the second mounting surface 12.
[0045] By adopting the above structure, placing two adjacent reducing units 6 on the first mounting surface 11 and the second mounting surface 12 can make the axes of the first rollers 61 in the adjacent reducing units 6 intersect with each other; more specifically, make the axes of the first rollers 61 in the adjacent reducing units 6 perpendicular to each other.
[0046] As an implementable method, each of the reducing units 6 includes a mounting seat, and two lateral support members 63 parallel to each other are fixedly connected to the mounting seat. The first roller 61 is rotatably connected between the two lateral support members 63, and both ends of the second roller 62 are rotatably connected to sliding seats 67, and each sliding seat 67 is slidably matched with the corresponding lateral support member 63. A positioning member is fixedly connected to the side of each lateral support member 63 away from the mounting seat, and an adjusting bolt 69 is screwed on the positioning member, and the adjusting bolt 69 is screwed to the sliding seat 67.
[0047] Specifically, each lateral support member 63 includes two support plates with a gap between the two support plates. The lower parts of the two support plates are fixedly connected to the bearing seat by bolts, and the two ends of the first roller 61 are rotatably connected in the bearing seat by bearings.
[0048] Grooves are provided on both sides of the sliding seat 67 , and the grooves are clamped on the opposite sides of the two support plates to achieve sliding cooperation between the sliding seat 67 and the lateral support member 63 .
[0049] Both ends of the second roller 62 are rotatably connected in the sliding seat 67 via bearings.
[0050] By rotating the adjusting bolt 69 , the position between the first roller 61 and the second roller 62 can be adjusted to adjust the size of the reduced diameter channel 66 accordingly.
[0051] As an implementable manner, one of the first roller 61 and the second roller 62 in each of the diameter reduction units 6 is connected to the driving motor 3 .
[0052] In this example, the first roller 61 is connected to the driving motor 3 , and the driving motor 3 may be a reduction motor to prevent the reduced diameter tube 2 from moving too fast.
[0053] As an implementable manner, the first roller 61 and the second roller 62 are transmission-connected via a gear mechanism, a belt transmission mechanism or a chain transmission mechanism.
[0054] In this example, the first roller 61 and the second roller 62 are connected by a gear mechanism. Specifically, the first roller 61 and the second roller 62 are integrally connected with a gear, and the two gears mesh with each other. The gear on the first roller 61 is a driving gear, and the gear on the second roller 62 is a passive gear.
[0055] As an implementable manner, a swing clamping mechanism 4 is provided on one side of the frame along the moving direction of the reduced tube 2 , and the swing clamping mechanism 4 is used to clamp the outer sleeve 5 so as to insert the reduced tube 2 into the outer sleeve 5 .
[0056] As an implementable method, the swing clamping mechanism 4 includes two claws 41 and a claw mounting seat, each of the claws 41 is rotatably cooperated with the claw mounting seat, and a linear drive 42 is connected between each of the claws 41 and the claw mounting seat, and each of the linear drives 42 is used to drive the corresponding claw 41 to rotate so as to clamp or release the outer sleeve 5.
[0057] As an implementable manner, each of the clamping claws 41 includes a rotating connection portion and a clamping portion and a driving portion located on both sides of the rotating connection portion, the rotating connection portion is rotationally matched with the clamping claw mounting seat, and the driving portion is connected to the linear drive 42.
[0058] When the linear drive 42 contracts, the clamping parts of the two claws 41 rotate in opposite directions. At this time, the outer sleeve 5 can be placed between the clamping parts of the two claws 41, and then the movable rod of the linear drive 42 is extended, and the clamping parts of the two claws 41 move toward each other to clamp the outer sleeve 5.
[0059] The linear drive 42 may be a pneumatic cylinder, a hydraulic cylinder or an electric push rod.
[0060] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate positions or positional relationships are based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0061] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other.
Claims
1. A necking machine, characterized in that: The machine comprises a frame, on which a plurality of reducing units are arranged side by side along the moving direction of the reduced-diameter pipe; Each diameter reduction unit includes a first roller and a second roller arranged side by side, and the axis of the first roller is arranged parallel to the axis of the second roller, the first roller is drivingly connected to the second roller, the outer circumference of the first roller is provided with a first arc groove, the outer circumference of the second roller is provided with a second arc groove, the arc boundary of the first arc groove and the arc boundary of the second arc groove on the side where the first roller and the second roller are close to each other form a diameter reduction channel, the arc boundary of the first arc groove and the arc boundary of the second arc groove are concentrically arranged, and the radius is equal; The axes of the first rollers in adjacent diameter reducing units are arranged to intersect; Along the moving direction of the reduced diameter tube, the reduced diameter channel of each reduced diameter unit is reduced in sequence.
2. The necking machine according to claim 1, characterized in that: The central angle of each arc-shaped boundary is α, 90°≤α≤170°.
3. The necking machine according to claim 2, characterized in that: Axes of the first rollers in adjacent diameter-reducing units are perpendicular to each other.
4. The necking machine according to any one of claims 1 to 3, characterized in that: The frame includes a first mounting surface and a second mounting surface, the first mounting surface is vertically arranged to the second mounting surface, and one of any two adjacent reducing units is fixed to the first mounting surface, and the other is fixed to the second mounting surface.
5. The necking machine according to claim 4, characterized in that: Each of the reducing units includes a mounting seat, to which two lateral support members parallel to each other are fixedly connected, the first roller is rotatably connected between the two lateral support members, and both ends of the second roller are rotatably connected to sliding seats, and each sliding seat is slidably matched with the corresponding lateral support member, and a positioning member is fixedly connected to the side of each lateral support member away from the mounting seat, and an adjusting bolt is threaded on the positioning member, and the adjusting bolt is threadedly connected to the sliding seat.
6. The necking machine according to any one of claims 1 to 3, characterized in that: One of the first roller and the second roller in each of the diameter reduction units is connected to a driving motor.
7. The necking machine according to claim 6, characterized in that: The first roller is connected to the second roller via a gear mechanism, a belt transmission mechanism or a chain transmission mechanism.
8. The necking machine according to any one of claims 1 to 3, characterized in that: The frame is provided with a swing clamping mechanism on one side along the moving direction of the reduced diameter tube, and the swing clamping mechanism is used to clamp the outer sleeve so as to insert the reduced diameter tube into the outer sleeve.
9. The necking machine according to claim 8, characterized in that: The swing-type clamping mechanism includes two claws and a claw mounting seat, each of the claws is rotatably matched with the claw mounting seat, and a linear drive is connected between each of the claws and the claw mounting seat, and each of the linear drives is used to drive the corresponding claw to rotate so as to clamp or release the outer sleeve.
10. The necking machine according to claim 9, characterized in that Each of the clamping claws comprises a rotating connection part and a clamping part and a driving part located on both sides of the rotating connection part. The rotating connection part is rotationally matched with the clamping claw mounting seat, and the driving part is connected to the linear drive.