Sectional type composite telescopic cold insulation PIR pipe connecting device
The segmented composite telescopic insulated PIR pipe connection device uses rotating and reversing components to achieve coaxial reversal, solving the problem of time-consuming and labor-intensive traditional flange connections and improving the efficiency and convenience of pipe connections.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-22
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional flange connections rely on multiple sets of bolts evenly distributed around the circumference for tightening. During operation, the bolts must be tightened sequentially in a diagonal order, which is time-consuming and labor-intensive.
A segmented composite telescopic cold-insulating PIR pipe connection device is adopted. Through the threaded connection of the first and second connecting components, combined with the rotating and reversing components, coaxial reversal is achieved, driving the rotational connection of the threaded seat and the threaded pipe, avoiding the need to tighten multiple sets of fastening bolts one by one.
It improves the efficiency and convenience of pipe connections, and reduces operation time and labor intensity.
Smart Images
Figure CN224033328U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to pipeline connecting device technical field, specifically, especially relate to sectional type composite telescopic cold insulation PIR pipe connecting device. BACKGROUND
[0002] PIR pipe is with polyimide (PI) as main material, has excellent high temperature stability, corrosion resistance and insulation pipe, is applicable to extreme temperature environment, composites multilayer cold insulation material (such as polyurethane foam, aerogel etc.) in PIR pipe outer layer, can reduce cold loss, prevent external heat transmission.
[0003] In traditional pipeline connecting technology, flange connection is widely used because of simple structure and strong pressure bearing capacity.But traditional flange connection needs to rely on multiple bolts uniformly distributed in the circumferential direction to fasten, and the bolts need to be tightened in turn according to the diagonal line sequence to ensure that the sealing surface is uniformly pressed, which consumes time and effort. UTILITY MODEL CONTENTS
[0004] In view of the problem that traditional flange connection needs to rely on multiple bolts uniformly distributed in the circumferential direction to fasten, and the bolts need to be tightened in turn according to the diagonal line sequence to ensure that the sealing surface is uniformly pressed, which consumes time and effort, the utility model provides sectional type composite telescopic cold insulation PIR pipe connecting device to overcome the above technical problems existing in the prior art.
[0005] To solve the above technical problems, the utility model is realized by the following technical schemes:
[0006] The utility model discloses a sectional type composite telescopic cold insulation PIR pipe connecting device, including first pipeline and second pipeline, the outer surface of first pipeline and second pipeline is provided with buckle assembly, first connecting component and second connecting component respectively, first connecting component and second connecting component can be connected between screw threads, the outer surface of first connecting component and second connecting component all is provided with rotating component, the outer surface of rotating component is provided with reversing component, reversing component is used to make rotating component carry out coaxial reversal, rotating component is used to drive first connecting component and second connecting component and rotate.
[0007] Further, the buckle assembly includes a first buckle plate, the outer surface of the first buckle plate is rotatably connected with a second buckle plate, a bolt is threadedly connected between the first buckle plate and the second buckle plate, and the first buckle plate and the second buckle plate each have two groups.
[0008] Further, the first connecting component includes a first rotating plate, the first rotating plate is rotatably connected with the first pipeline, a threaded seat is fixedly connected to the outer surface of the first rotating plate, and a first sealing ring is fixedly connected to the outer surface of the first rotating plate.
[0009] Further, the second connecting assembly comprises a second rotating plate, the second rotating plate is rotationally connected with the second pipeline, the outer surface of the second rotating plate is fixedly connected with a threaded pipe, the outer surface of the second rotating plate is fixedly connected with an extension pipe, and the outer surface of the extension pipe is fixedly connected with a second sealing ring.
[0010] Further, the rotating assembly comprises a first rotating shaft, the end of the first rotating shaft is rotationally connected with a second rotating shaft, the first rotating shaft and the second rotating shaft are rotationally connected with two groups of first buckling plates respectively, the outer surfaces of the first rotating shaft and the second rotating shaft are provided with sliding grooves, the first rotating shaft and the second rotating shaft are slidingly connected with a first sliding gear and a second sliding gear through the sliding grooves respectively, the outer surfaces of the first sliding gear and the second sliding gear are meshed with a first tooth ring and a second tooth ring respectively, the first tooth ring and the second tooth ring are fixedly connected with a threaded seat and a threaded pipe respectively, and the two groups of first buckling plates are rotationally connected with a first rotating plate and a second rotating plate respectively.
[0011] Further, the reversing assembly comprises a fixed box, the first rotating shaft and the second rotating shaft are rotationally connected with the fixed box, the inner part of the fixed box is rotationally connected with a first reversing tooth and a second reversing tooth respectively, the first reversing tooth and the second reversing tooth are meshed with each other, the outer surface of the first reversing tooth is meshed with a first linkage tooth, the first linkage tooth is fixedly connected with the first rotating shaft, the outer surface of the second reversing tooth is meshed with a second linkage tooth, and the second linkage tooth is fixedly connected with the second rotating shaft.
[0012] Further, the bottom of the fixed box is fixedly connected with a fixed column, the lower end of the fixed column is fixedly connected with a square plate, the outer surface of the square plate is slidingly connected with a sliding support column, a plurality of groups of sliding support columns are provided, and the plurality of groups of sliding support columns are fixedly connected with the first buckling plates.
[0013] Further, the bottom of the square plate is fixedly connected with a screw post and a telescopic rod, the outer surface of the screw post is threadedly connected with a screw barrel, the lower end of the telescopic rod is fixedly connected with a bottom plate, and the screw barrel is rotationally connected with the bottom plate.
[0014] The utility model has the following beneficial effects:
[0015] 1、 the utility model discloses a first connecting assembly and second connecting assembly are connected, and the first connecting assembly and second connecting assembly are located at the outer surface of first pipeline and second pipeline respectively, when the first connecting assembly and second connecting assembly are close to each other, the first connecting assembly and second connecting assembly are rotated, and the first pipeline and second pipeline are connected and sealed through the threaded connection between the first connecting assembly and second connecting assembly, so that a plurality of fastening bolts need not be tightened one by one, and the utility model is convenient to use.
[0016] 2. The utility model discloses a first pivot and the connection of first linkage tooth, and the first pivot drives first linkage tooth to rotate, and first linkage tooth drives first commutating tooth to rotate, and first commutating tooth drives second linkage tooth to rotate through second commutating tooth, at this moment, the rotation direction of first linkage tooth and second linkage tooth is opposite, and then makes first pivot and second pivot realize coaxial reverse rotation to drive threaded seat and threaded pipe to produce the rotation of different directions, improves the connection efficiency.
[0017] Of course, it is not necessary to achieve all the advantages described above at the same time to implement any product of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be needed to use the drawing of the embodiment to introduce briefly, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.
[0019] Figure 1 It is the external contour structure schematic of the utility model Figure 1 ;
[0020] Figure 2 It is the external contour structure schematic of the utility model Figure 2 ;
[0021] Figure 3 It is the second connection assembly structure schematic of the utility model;
[0022] Figure 4 It is the commutating assembly structure schematic of the utility model Figure 1 ;
[0023] Figure 5 It is the Figure 4 structure enlarged schematic of the utility model in A place;
[0024] Figure 6 It is the commutating assembly structure schematic of the utility model Figure 2 ;
[0025] Figure 7 It is the Figure 6 structure enlarged schematic of the utility model in B place.
[0026] In the drawings, the component list represented by each sign is as follows:
[0027] 1, the first pipeline; 2, the second pipeline; 3, buckle assembly; 301, the first buckle plate; 302, the second buckle plate; 303, bolt; 4, the first connecting assembly; 401, the first rotating plate; 402, the threaded seat; 403, the first sealing ring; 5, the second connecting assembly; 501, the second rotating plate; 502, the threaded pipe; 503, the extension pipe; 504, the second sealing ring; 6, rotating assembly; 601, the first rotating shaft; 602, the second rotating shaft; 603, the chute; 604, the first sliding gear; 605, the second sliding gear; 606, the first tooth ring; 607, the second tooth ring; 7, reversing assembly; 701, fixed box; 702, the first reversing tooth; 703, the second reversing tooth; 704, the first linkage tooth; 705, the second linkage tooth; 8, fixed column; 9, square plate; 10, sliding support; 11, stud; 12, telescopic rod; 13, screw cylinder; 14, bottom plate. DETAILED DESCRIPTION
[0028] The technical solutions in the utility model embodiments will be clearly and completely described below with reference to the drawings in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0029] In the description of the utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the utility model.
[0030] Please refer to Figures 1-7 As shown in the figure, the utility model is a sectional type composite telescopic cold insulation PIR pipe connecting device, which comprises a first pipeline 1 and a second pipeline 2, the outer surfaces of the first pipeline 1 and the second pipeline 2 are respectively provided with a buckle assembly 3, a first connecting assembly 4 and a second connecting assembly 5, the first connecting assembly 4 and the second connecting assembly 5 can be threadedly connected, the outer surfaces of the first connecting assembly 4 and the second connecting assembly 5 are both provided with a rotating assembly 6, the outer surface of the rotating assembly 6 is provided with a reversing assembly 7, the reversing assembly 7 is used for coaxially reversing the rotating assembly 6, and the rotating assembly 6 is used for driving the first connecting assembly 4 and the second connecting assembly 5 to rotate.
[0031] The first pipe 1 and the second pipe 2 are both sectional composite expansion cold insulation PIR pipes, the expansion part adopts a bellows type structure, after two groups of buckling assemblies 3 are buckled on the outer surfaces of the first pipe 1 and the second pipe 2 respectively, the rotating assembly 6 on the outer surface of the buckling assembly 3 is rotated, the rotating assembly 6 drives the first connecting assembly 4 and the second connecting assembly 5 to rotate through the reversing assembly 7 for coaxial reverse rotation, the first connecting assembly 4 and the second connecting assembly 5 rotate in opposite directions, and when the first connecting assembly 4 and the second connecting assembly 5 approach each other, the first connecting assembly 4 and the second connecting assembly 5 are connected and sealed through threaded connection.
[0032] The first connecting assembly 4 and the second connecting assembly 5 are connected, the first connecting assembly 4 and the second connecting assembly 5 are located on the outer surfaces of the first pipe 1 and the second pipe 2 respectively, the first connecting assembly 4 and the second connecting assembly 5 are rotated when the first connecting assembly 4 and the second connecting assembly 5 approach each other, the first pipe 1 and the second pipe 2 are connected and sealed through threaded connection between the first connecting assembly 4 and the second connecting assembly 5, a plurality of fastening bolts do not need to be tightened one by one, and use is more convenient.
[0033] In one embodiment, for the buckling assembly 3, the buckling assembly 3 comprises a first buckling plate 301, a second buckling plate 302 is rotatably connected to the outer surface of the first buckling plate 301, and a bolt 303 is threadedly connected between the first buckling plate 301 and the second buckling plate 302.
[0034] The first buckling plate 301 is first contacted with the first pipe 1, and then the second buckling plate 302 is rotated to be buckled with the first buckling plate 301 to buckle the first connecting assembly 4 on the outer surface of the first pipe 1, another group of the first buckling plate 301 and the second buckling plate 302 buckles the second connecting assembly 5, and the bolt 303 is rotated to limit and fix the first buckling plate 301 and the second buckling plate 302, at this time, the first buckling plate 301 and the second buckling plate 302 support the first pipe 1, and the first pipe 1 can normally expand and contract between the first buckling plate 301 and the second buckling plate 302.
[0035] In one embodiment, for the first connecting assembly 4, the first connecting assembly 4 comprises a first rotating plate 401, the first rotating plate 401 is rotatably connected with the first pipe 1, a threaded seat 402 is fixedly connected to the outer surface of the first rotating plate 401, and a first sealing ring 403 is fixedly connected to the outer surface of the first rotating plate 401.
[0036] In one embodiment, for the second connecting assembly 5 described above, the second connecting assembly 5 comprises a second rotating plate 501, the second rotating plate 501 is rotationally connected with the second pipe 2, the outer surface of the second rotating plate 501 is fixedly connected with a threaded pipe 502, the outer surface of the second rotating plate 501 is fixedly connected with an extension pipe 503, and the outer surface of the extension pipe 503 is fixedly connected with a second sealing ring 504.
[0037] The first rotating plate 401 and the second rotating plate 501 are pushed to approach each other, the first rotating plate 401 and the second rotating plate 501 respectively stretch the first pipe 1 and the second pipe 2, the first rotating plate 401 and the second rotating plate 501 are pushed, the first rotating plate 401 drives the threaded seat 402 to rotate, the second rotating plate 501 drives the threaded pipe 502 to rotate, the threaded seat 402 and the threaded pipe 502 are threadedly connected and drive the first pipe 1 and the second pipe 2 to approach each other, and after the threaded connection is in place, the second sealing ring 504 on the outer surface of the extension pipe 503 and the first sealing ring 403 on the outer surface of the first rotating plate 401 are pressed against each other, thereby improving the sealing performance.
[0038] In one embodiment, for the rotating assembly 6 described above, the rotating assembly 6 comprises a first rotating shaft 601, the end of the first rotating shaft 601 is rotationally connected with a second rotating shaft 602, the first rotating shaft 601 and the second rotating shaft 602 are respectively rotationally connected with two groups of first buckling plates 301, the outer surfaces of the first rotating shaft 601 and the second rotating shaft 602 are both provided with a sliding groove 603, the first rotating shaft 601 and the second rotating shaft 602 are respectively slidably connected with a first sliding gear 604 and a second sliding gear 605 through the sliding groove 603, the outer surfaces of the first sliding gear 604 and the second sliding gear 605 are respectively engaged with a first tooth ring 606 and a second tooth ring 607, the first tooth ring 606 and the second tooth ring 607 are respectively fixedly connected with the threaded seat 402 and the threaded pipe 502, and the two groups of first buckling plates 301 are respectively rotationally connected with the first rotating plate 401 and the second rotating plate 501.
[0039] Rotate the first rotating shaft 601, the first rotating shaft 601 drives the second rotating shaft 602 to rotate through the reversing assembly 7, the rotating direction of the first rotating shaft 601 is opposite to that of the second rotating shaft 602, the first rotating shaft 601 drives the first sliding gear 604 to rotate, the second rotating shaft 602 drives the second sliding gear 605 to rotate, the first sliding gear 604 is engaged with the first tooth ring 606 and drives the first rotating plate 401 to rotate, the second sliding gear 605 is engaged with the second tooth ring 607 and drives the second rotating plate 501 to rotate, the rotating direction of the threaded seat 402 on the outer surface of the first rotating plate 401 is opposite to that of the threaded pipe 502, so that the efficiency of the rotating connection between the threaded seat 402 and the threaded pipe 502 is higher. The first clamping plate 301 and the second clamping plate 302 buckled on the outer surface of the second rotating plate 501 are in rotating connection with the second rotating plate 501, the threaded seat 402 and the threaded pipe 502 drive two groups of first clamping plates 301 to move respectively during the connection process, the two groups of first clamping plates 301 respectively push the first sliding gear 604 and the second sliding gear 605 to move along the sliding groove 603, so that the first sliding gear 604 and the second sliding gear 605 are always in the engaged state with the first tooth ring 606 and the second tooth ring 607.
[0040] In one embodiment, for the above-mentioned reversing assembly 7, the reversing assembly 7 comprises a fixed box 701, the first rotating shaft 601 and the second rotating shaft 602 are in rotating connection with the fixed box 701, the inner part of the fixed box 701 is in rotating connection with a first reversing tooth 702 and a second reversing tooth 703 respectively, the first reversing tooth 702 is engaged with the second reversing tooth 703, the outer surface of the first reversing tooth 702 is engaged with a first linkage tooth 704, the first linkage tooth 704 is fixedly connected with the first rotating shaft 601, the outer surface of the second reversing tooth 703 is engaged with a second linkage tooth 705, and the second linkage tooth 705 is fixedly connected with the second rotating shaft 602.
[0041] The first rotating shaft 601 drives the first linkage tooth 704 to rotate, the first linkage tooth 704 drives the first reversing tooth 702 to rotate, the first reversing tooth 702 drives the second linkage tooth 705 to rotate through the second reversing tooth 703, at this time, the rotating direction of the first linkage tooth 704 and the second linkage tooth 705 is opposite, thereby the first rotating shaft 601 and the second rotating shaft 602 realize coaxial reverse rotation to drive the threaded seat 402 and the threaded pipe 502 to rotate in different directions, and the connection efficiency is improved.
[0042] In one embodiment, for the above-mentioned fixed box 701, the bottom of the fixed box 701 is fixedly connected with a fixed column 8, the lower end of the fixed column 8 is fixedly connected with a square plate 9, the outer surface of the square plate 9 is slidingly connected with a sliding support column 10, a plurality of groups of sliding support columns 10 are provided, and the plurality of groups of sliding support columns 10 are fixedly connected with the first clamping plate 301.
[0043] The square plate 9 and the sliding support column 10 are used for supporting the two groups of first buckling plates 301, and the sliding connection between the square plate 9 and the sliding support column 10 can avoid blocking the movement of the first buckling plates 301, and the fixed column 8 is used for supporting the fixed box 701.
[0044] In one embodiment, for the square plate 9 described above, the bottom of the square plate 9 is fixedly connected with a stud 11 and a telescopic rod 12, the outer surface of the stud 11 is threadedly connected with a screw cylinder 13, the lower end of the telescopic rod 12 is fixedly connected with a bottom plate 14, and the screw cylinder 13 is rotationally connected with the bottom plate 14.
[0045] The screw cylinder 13 is rotated, the rotation trend of the stud 11 inside the screw cylinder 13 is blocked by the square plate 9 and the telescopic rod 12, at this time, the screw cylinder 13 can drive the stud 11 to move the square plate 9, so as to adjust the height of the whole device.
[0046] Through the above technical scheme, 1, through the connection of the first connecting assembly 4 and the second connecting assembly 5, the first connecting assembly 4 and the second connecting assembly 5 are respectively located on the outer surfaces of the first pipeline 1 and the second pipeline 2, when the first connecting assembly 4 and the second connecting assembly 5 are close to each other, the first connecting assembly 4 and the second connecting assembly 5 are pushed to rotate, and the first pipeline and the second pipeline 2 are connected and sealed through the threaded connection between the first connecting assembly 4 and the second connecting assembly 5, without tightening a plurality of fastening bolts one by one, which is more convenient to use; 2, through the connection of the first rotating shaft 601 and the first linkage tooth 704, the first rotating shaft 601 drives the first linkage tooth 704 to rotate, the first linkage tooth 704 drives the first reversing tooth 702 to rotate, the first reversing tooth 702 drives the second linkage tooth 705 to rotate through the second reversing tooth 703, at this time, the rotation directions of the first linkage tooth 704 and the second linkage tooth 705 are opposite, and then the first rotating shaft 601 and the second rotating shaft 602 realize coaxial reverse rotation to drive the threaded seat 402 and the threaded pipe 502 to rotate in different directions, thereby improving the connection efficiency.
[0047] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0048] The preferred embodiments of the utility model disclosed above are only used for illustrating the utility model. The preferred embodiments do not describe all the details, and the utility model is not limited to the specific embodiments described. Obviously, according to the content of the description, many modifications and changes can be made. The description selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited only by the claims and the entire scope and equivalents thereof.
Claims
1. A segmented composite telescopic cold-insulating PIR pipe connection device, comprising a first pipe (1) and a second pipe (2), characterized in that, The outer surfaces of the first pipe (1) and the second pipe (2) are respectively provided with a fastening component (3), a first connecting component (4) and a second connecting component (5). The first connecting component (4) and the second connecting component (5) can be threaded together. The outer surfaces of the first connecting component (4) and the second connecting component (5) are each provided with a rotating component (6). The outer surface of the rotating component (6) is provided with a reversing component (7). The reversing component (7) is used to make the rotating component (6) rotate in a coaxial direction. The rotating component (6) is used to drive the first connecting component (4) and the second connecting component (5) to rotate.
2. The segmented composite telescopic cold-insulating PIR pipe connection device according to claim 1, characterized in that, The fastening assembly (3) includes a first fastening plate (301), and a second fastening plate (302) is rotatably connected to the outer surface of the first fastening plate (301). A bolt (303) is threaded between the first fastening plate (301) and the second fastening plate (302). There are two sets of the first fastening plate (301) and the second fastening plate (302).
3. The segmented composite telescopic cold-insulating PIR pipe connection device according to claim 2, characterized in that, The first connecting assembly (4) includes a first rotating plate (401), which is rotatably connected to the first pipe (1). A threaded seat (402) is fixedly connected to the outer surface of the first rotating plate (401), and a first sealing ring (403) is fixedly connected to the outer surface of the first rotating plate (401).
4. The segmented composite telescopic cold-insulating PIR pipe connection device according to claim 3, characterized in that, The second connecting assembly (5) includes a second rotating plate (501), which is rotatably connected to the second pipe (2). A threaded pipe (502) is fixedly connected to the outer surface of the second rotating plate (501), and an extension pipe (503) is fixedly connected to the outer surface of the second rotating plate (501). A second sealing ring (504) is fixedly connected to the outer surface of the extension pipe (503).
5. The segmented composite telescopic cold-insulating PIR pipe connection device according to claim 4, characterized in that, The rotating assembly (6) includes a first rotating shaft (601), and a second rotating shaft (602) is rotatably connected to the end of the first rotating shaft (601). The first rotating shaft (601) and the second rotating shaft (602) are rotatably connected to two sets of first fastening plates (301), respectively. The outer surfaces of the first rotating shaft (601) and the second rotating shaft (602) are provided with sliding grooves (603). The first rotating shaft (601) and the second rotating shaft (602) are slidably connected to a first sliding gear (604) and a second sliding gear (605) through the sliding grooves (603), respectively. The outer surfaces of the first sliding gear (604) and the second sliding gear (605) are respectively meshed with a first toothed ring (606) and a second toothed ring (607). The first toothed ring (606) and the second toothed ring (607) are respectively fixedly connected to a threaded seat (402) and a threaded tube (502), respectively. The two sets of first fastening plates (301) are rotatably connected to a first rotating plate (401) and a second rotating plate (501), respectively.
6. The segmented composite telescopic cold-insulating PIR pipe connection device according to claim 5, characterized in that, The reversing assembly (7) includes a fixed housing (701), and the first rotating shaft (601) and the second rotating shaft (602) are rotatably connected to the fixed housing (701). The fixed housing (701) is rotatably connected to a first reversing tooth (702) and a second reversing tooth (703). The first reversing tooth (702) and the second reversing tooth (703) mesh with each other. The outer surface of the first reversing tooth (702) meshes with a first linkage tooth (704). The first linkage tooth (704) is fixedly connected to the first rotating shaft (601). The outer surface of the second reversing tooth (703) meshes with a second linkage tooth (705). The second linkage tooth (705) is fixedly connected to the second rotating shaft (602).
7. The segmented composite telescopic cold-insulating PIR pipe connection device according to claim 6, characterized in that, The bottom of the fixed box (701) is fixedly connected to a fixed column (8), and the lower end of the fixed column (8) is fixedly connected to a square plate (9). The outer surface of the square plate (9) is slidably connected to a sliding support column (10). There are multiple sets of sliding support columns (10), and all sets of sliding support columns (10) are fixedly connected to the first fastening plate (301).
8. The segmented composite telescopic cold-insulating PIR pipe connection device according to claim 7, characterized in that, The bottom of the square plate (9) is fixedly connected to a stud (11) and a telescopic rod (12). The outer surface of the stud (11) is threaded with a screw cylinder (13). The lower end of the telescopic rod (12) is fixedly connected to a base plate (14). The screw cylinder (13) and the base plate (14) are rotatably connected.