CN115013643A

CN115013643A - Heat-preservation foam wrapping method and device for low-pressure pipeline of refrigeration system

Info

Publication number: CN115013643A
Application number: CN202210947789.6A
Authority: CN
Inventors: 汪贺男; 汪庆云; 杨国云; 濮礼林
Original assignee: Changzhou Haozhiding Polymer Materials Co ltd
Current assignee: Changzhou Haozhiding Polymer Materials Co ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-09-06
Anticipated expiration: 2042-08-09
Also published as: CN115013643B

Abstract

The invention belongs to the technical field of pipeline wrapping, in particular to a method and a device for wrapping heat preservation foam of a low-pressure pipeline of a refrigerating system, which comprises a movable frame sliding along the surface of the pipeline, wherein the foam and the pipeline are respectively arranged on the upper surface and the lower surface of the movable frame, two ends of the movable frame are fixedly connected with annular frames in sliding connection with the surface of the pipeline, and the pipeline penetrates through the annular frames; the movable frame is provided with a through hole, the foam passes through the through hole, and the movable frame is provided with a pressing mechanism for wrapping the foam on the surface of the pipeline; a cutting knife for cutting the foam is fixedly connected to the movable frame, a spreading mechanism for spreading the foam from the cutting seam is arranged on the movable frame, and a guide ring matched with the foam is arranged on the movable frame; according to the invention, the foam can be automatically wrapped on the surface of the pipeline by arranging the movable frame, the pressing mechanism and the opening mechanism, so that the problem of low manual wrapping efficiency is solved.

Description

Heat-preservation foam wrapping method and device for low-pressure pipeline of refrigeration system

Technical Field

The invention relates to the technical field of pipeline wrapping, in particular to a method and a device for wrapping heat preservation foam of a low-pressure pipeline of a refrigeration system.

Background

Vapor compression refrigeration is widely used in the industrial and commercial refrigeration fields. The cold supply principle is that the low-temperature liquid refrigeration working medium evaporates and absorbs heat in the evaporator to provide cold for the load. At present, a freezing and refrigerating system of a refrigerator car on the market comprises a compressor, a four-way valve, a condenser, a throttling component, an evaporator and a vapor-liquid separator; during refrigeration, a compressor compresses a high-temperature refrigerant, the high-temperature refrigerant flows into a condenser through a four-way valve, returns to an evaporator through a throttling component for heat exchange, flows to a vapor-liquid separator through the four-way valve and flows back to the compressor to form a cycle, in order to improve the refrigeration effect of the refrigerator, heat insulation materials such as foam are generally wrapped on pipelines, the foam pipelines have a heat insulation effect with the outside, and the loss of cold quantity is avoided.

In the prior art, the method for wrapping the foam on the pipeline is generally manual wrapping, the foam is firstly cut along the length direction of the foam, then the foam is wrapped on the pipeline, and for a longer pipeline, the manual wrapping efficiency is lower, the time is long, and the time and the labor are wasted.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a method and a device for wrapping heat preservation foam of a low-pressure pipeline of a refrigerating system.

In order to achieve the technical purpose, the invention provides a device for wrapping heat preservation foam of a low-pressure pipeline of a refrigerating system, which comprises a movable frame sliding along the surface of the pipeline, wherein the foam and the pipeline are respectively arranged on the upper surface and the lower surface of the movable frame, two ends of the movable frame are fixedly connected with annular frames in sliding connection with the surface of the pipeline, and the pipeline penetrates through the annular frames; the movable frame is provided with a through hole, the foam passes through the through hole, and the movable frame is provided with a pressing mechanism for wrapping the foam on the surface of the pipeline; the movable frame is fixedly connected with a cutting knife used for cutting the foam, the movable frame is provided with a spreading mechanism for spreading the foam from a cutting seam, and the movable frame is provided with a guide ring matched with the foam.

As a preferred technical scheme of the invention, the annular frame comprises a pair of arc hoops which are mutually and rotationally connected, and one ends of the two arc hoops are rotationally connected through a connecting block; and a plurality of rollers are radially arranged on the inner surface of the arc hoop, a threaded rod is rotatably connected to the rollers, and the threaded rod is in threaded connection with the arc hoop.

As a preferable technical scheme of the invention, one end of one of the arc hoops is rotatably connected with a clamping rod, one end of the other arc hoop is provided with a clamping groove matched and connected with the clamping rod, the end part of the clamping rod is provided with a stop block, the clamping rod is movably connected with a spring and a pressing sheet, and the spring is arranged between the pressing sheet and the stop block.

As a preferable aspect of the present invention, the opening mechanism includes: the pair of sliding blocks are fixedly connected with supporting rods for supporting the foam; the pair of fixed blocks are respectively arranged on two sides of the through hole, a U-shaped frame is fixedly connected between the two fixed blocks, a sliding rod is fixedly connected between the U-shaped frame and the fixed blocks, and the sliding block is connected to the sliding rod in a sliding mode.

As a preferred technical scheme of the invention, the U-shaped frame is rotatably connected with a screw rod, two ends of the screw rod are provided with thread lines in opposite directions, and the two sliding blocks are respectively in threaded connection with two ends of the screw rod; the two sides of the through hole are symmetrically and fixedly connected with a pair of slide rails in sliding fit with the fixing block, and the fixing block is fixedly connected to the slide rails through bolts.

As a preferred technical scheme of the invention, the pressing mechanism comprises a pressing wheel frame, a pressing wheel is rotationally connected in the pressing wheel frame, and a connecting rod is fixedly connected on the pressing wheel frame; the movable rack is fixedly connected with a support, the connecting rod is fixedly connected with the support, and the support is provided with a connecting hole fixedly connected with the connecting rod.

As a preferred technical scheme of the present invention, a winding mechanism for fixing foam on the surface of a pipeline is disposed on the movable frame, the winding mechanism includes a fixing ring, the fixing ring is sleeved outside the pipeline, the surface of the fixing ring is rotatably connected with a gear ring, the gear ring is fixedly connected with a fixing frame, the fixing frame is rotatably connected with an adhesive tape roller, and the adhesive tape roller is connected with an adhesive tape roll.

As a preferred technical scheme of the invention, a first connecting frame is fixedly connected to the pressing wheel frame, a second connecting frame is fixedly connected to the fixing ring, and an adjusting mechanism for adjusting the distance between the first connecting frame and the second connecting frame is connected between the first connecting frame and the second connecting frame; the adjustment mechanism includes: the connecting rods are hinged with each other and are respectively and rotatably connected with the first connecting frame and the second connecting frame; the fixing rod is fixedly connected to the second connecting frame, a vertical plate is fixedly connected to the first connecting frame, and a strip-shaped hole connected with the fixing rod in a matched mode is formed in the vertical plate.

As a preferred technical scheme of the invention, a first rotating shaft which rotates coaxially and integrally is fixedly connected to the pressing wheel, a second rotating shaft is rotatably connected to the second connecting frame, and the first rotating shaft and the second rotating shaft are in transmission connection through a belt line and a belt pulley; the second connecting frame is rotatably connected with a third rotating shaft, one end of the third rotating shaft is fixedly connected with a gear meshed with the gear ring, and the third rotating shaft is rotatably connected with the second rotating shaft through a bevel gear in a meshed mode.

A packaging method of heat preservation foam of a low-pressure pipeline of a refrigerating system comprises the following steps:

s1, the tubular foam and the pipeline are respectively arranged on the upper side and the lower side of the movable frame, the foam penetrates through the guide ring and the through hole, and the pipeline penetrates through the annular frame;

s2, the moving frame moves forwards along the surface of the pipeline, in the moving process, the cutting knife cuts one side, close to the pipeline, of the bottom of the foam cotton, the cut foam cotton is unfolded by the unfolding mechanism, the foam cotton is conveniently wrapped on the surface of the pipeline, and then the foam cotton is wrapped on the surface of the pipeline through the pressing wheel;

s3, the pinch roller rotates and simultaneously drives the gear to rotate, the gear drives the gear ring to rotate, the adhesive tape roll is further driven to do circular motion along the outer side of the pipeline, and foam is wrapped on the pipeline through the adhesive tape.

The beneficial effects of the invention are as follows:

1. according to the invention, the cutting knife, the opening mechanism and the pressing mechanism are arranged on the moving frame, so that foam can be automatically cut and wrapped on the surface of the pipeline when the moving frame moves on the pipeline, the wrapping efficiency of the foam is improved, and the problem of low manual wrapping efficiency is solved.

2. According to the invention, when the pressing wheel rotates, the gear ring is driven to rotate, and the gear ring rotates to drive the adhesive tape roll to do circular motion on the surface of the pipeline, so that the adhesive tape roll is wound and adhered to the surface of foam cotton while the moving frame moves forwards, and the stability of the foam cotton is ensured.

Drawings

FIG. 1 is a schematic view of a pipeline wrapping state according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a heat-insulating foam wrapping device for a low-pressure pipeline of a refrigeration system according to the present invention;

FIG. 3 is a schematic structural view of the movable frame;

FIG. 4 is a schematic structural view of the annular frame;

FIG. 5 is a schematic view of the distracting mechanism;

FIG. 6 is a schematic structural diagram of a pressing mechanism and a winding mechanism;

FIG. 7 is a schematic perspective view of FIG. 6;

fig. 8 is a partial enlarged view of a portion a in fig. 7.

In the figure: 1. a movable frame; 2. an annular frame; 21. an arc-shaped hoop; 22. connecting blocks; 23. a threaded rod; 24. a roller; 25. a clamping rod; 26. a card slot; 27. a spring; 28. a stopper; 29. tabletting; 3. a pressing mechanism; 31. a pinch roller; 32. a pressure wheel frame; 33. a connecting rod; 34. a first connecting frame; 35. a first rotating shaft; 36. a belt pulley; 37. a belt line; 38. a connecting rod; 39. fixing the rod; 310. a vertical plate; 4. a winding mechanism; 41. a fixing ring; 42. a gear ring; 43. a second link frame; 44. a second rotating shaft; 45. a third rotating shaft; 46. a gear; 47. a fixed mount; 48. an adhesive tape roll; 49. an adhesive tape roll; 410. a guide roller; 5. a pipeline; 6. a distraction mechanism; 61. a U-shaped frame; 62. a slide bar; 63. a screw rod; 64. a slider; 65. a stay bar; 66. a fixed block; 7. a through hole; 8. a support; 9. a guide ring; 10. cutting; 11. a slide rail; 12. and (5) soaking cotton.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example (b):

as shown in figures 1-3, the invention is a thermal insulation foam wrapping device for a low-pressure pipeline of a refrigeration system, comprising a movable frame 1 sliding along the surface of a pipeline 5, when in use, foam 12 and the pipeline 5 are respectively arranged on the upper and lower surfaces of the movable frame 1, two ends of the movable frame 1 are fixedly connected with an annular frame 2 sliding connected with the surface of the pipeline 5, the pipeline 5 passes through the annular frame 2, so that the movable frame 1 is ensured to stably slide on the surface of the pipeline, wherein the movable frame 1 is provided with a through hole 7, the foam 12 passes through the through hole 7, the movable frame 1 is provided with a pressing mechanism 3 for wrapping the foam 12 on the surface of the pipeline 5, the pressing mechanism 3 is arranged above the through hole 7, the trend of the foam 12 is changed through the pressing mechanism 3, the foam 12 is wrapped on the pipeline 5, the movable frame 1 is provided with a guide ring 9 matched with the foam, the foam 12 passes through the guide ring 9, the guide ring 9 is provided with an opening, the convenience is with steeping cotton 12 and passing guide ring 9, and fixedly connected with is used for the cutting knife 10 that the cotton 12 of bubble was cut open on removing frame 1, and the one end of through-hole 7 is located to cutting knife 10, removes to be equipped with the fixing base on the frame 1, and cutting knife 10 passes through the bolt and installs on the fixing base, and is equipped with opening mechanism 6 on removing frame 1, struts the cotton from the slot of bubble through opening mechanism 6 to the convenience wraps up the cotton 12 of bubble on pipeline 5.

As shown in fig. 4, the annular frame 2 comprises a pair of arc hoops 21 which are rotatably connected with each other, and one ends of the two arc hoops 21 are rotatably connected through a connecting block 22; one end of one of the arc hoops 21 is rotatably connected with a clamping rod 25, one end of the other arc hoop 21 is provided with a clamping groove 26 which is connected with the clamping rod 25 in a matched mode, the end portion of the clamping rod 25 is provided with a stop block 28, the clamping rod 25 is movably connected with a spring 27 and a pressing sheet 29, the spring 27 is arranged between the pressing sheet 29 and the stop block 28, the inner surface of the arc hoop 21 is radially provided with a plurality of rollers 24 along the inner surface of the arc hoop, the rollers 24 are rotatably connected with a threaded rod 23, the threaded rod 23 is in threaded connection with the arc hoop 21, the positions of the rollers 24 are adjusted through the threaded rod 23 to enable the rollers to be in surface contact with the pipeline 5, the rollers 24 roll on the surface of the pipeline 5, the annular frame 2 is in a structure capable of opening and closing through the clamping rod 25, the spring 27 exerts pressure on the pressing sheet 29, and the clamping rod 25 is guaranteed to be stably clamped in the clamping groove 26.

As shown in fig. 5, the pair of the opening mechanisms 6 includes a slide rail 11, and the slide rail 11 is respectively disposed at two sides of the through hole 7: the slide rail 11 is connected with fixed blocks 66 in a sliding manner, a U-shaped frame 61 is fixedly connected between the two fixed blocks 66, a slide rod 62 is fixedly connected between the U-shaped frame 61 and the fixed blocks 66, a slide block 64 is connected on the slide rod 62 in a sliding manner, and a support rod 65 for supporting foam is fixedly connected on the slide block 64; a screw rod 63 is rotatably connected to the U-shaped frame 61, opposite thread lines are arranged at two ends of the screw rod 63, two sliding blocks 64 are respectively in threaded connection with two ends of the screw rod 63, and the screw rod 63 is rotated to drive the two sliding blocks 64 to move in different directions and drive a stay bar 65 to prop open the foam; through-hole 7 bilateral symmetry fixedly connected with a pair of and fixed block 66 sliding fit, fixed block 66 passes through bolt fixed connection on slide rail 11, and this mechanism 6 struts the position and struts big or small degree and can adjust to the cotton parcel of bubble to reach and adjust the effect of bubble cotton parcel on the pipeline.

As shown in fig. 6-7, the pressing mechanism 3 includes a pressing wheel frame 32, a pressing wheel 31 is rotatably connected in the pressing wheel frame 32, the pressing wheel 31 presses and wraps the foam 12 on the pipeline 5, a first connecting frame 34 is fixedly connected to the pressing wheel frame 32, and a connecting rod 33 is fixedly connected to the pressing wheel frame 32; the movable rack 1 is fixedly connected with a support 8, the support 8 is provided with a connecting hole fixedly connected with a connecting rod 33, the connecting rod 33 is fixedly connected with the connecting hole through a nut, the height of a pressure wheel 31 can be adjusted to adjust the wrapping effect of foam, the movable rack 1 is provided with a winding mechanism 4 for fixing the foam on the surface of a pipeline, the winding mechanism 4 comprises a fixing ring 41, the fixing ring 41 is fixedly connected with a second connecting rack 43, the fixing ring 41 is sleeved outside the pipeline 5, the surface of the fixing ring 41 is rotatably connected with a gear ring 42, the side surface of the gear ring 42 is fixedly connected with a fixing rack 47, the fixing rack 47 is rotatably connected with an adhesive tape roller 48, the adhesive tape roller 48 is connected with an adhesive tape roll 49, the fixing rack 47 is connected with a guide roller 410, the guide roller 410 plays a role in guiding the winding of the adhesive tape, the pressure wheel 31 is fixedly connected with a first rotating shaft 35 which rotates together with the same axis, the second connecting frame 43 is rotatably connected with a second rotating shaft 44, and the first rotating shaft 35 and the second rotating shaft 44 are in transmission connection through a belt line 37 and a belt pulley 36; second link 43 is last to rotate and is connected with third axis of rotation 45, third axis of rotation 45 sets up with second axis of rotation 44 is perpendicular, third axis of rotation 45 one end fixedly connected with and gear 46 of ring gear 42 meshing, and be connected through helical gear meshing rotation between third axis of rotation 45 and the second axis of rotation 44, pinch roller 31 drives belt line 37 and belt pulley 36 rotation when rotating, and then drive second axis of rotation 44 and rotate, second axis of rotation 44 drives third axis of rotation 45 and rotates, third axis of rotation 45 drives gear 46 and rotates, gear 46 drives ring gear 42 and rotates, ring gear 42 drives tape roll 49 and rotates in pipeline outside circular motion, moving frame 1 is in the in-process that moves forward, tape roll 49 twines the foam of pipeline surface parcel.

As shown in fig. 8, in order to adjust the distance and the height difference between the first connecting frame 34 and the second connecting frame 43, an adjusting mechanism is connected between the first connecting frame 34 and the second connecting frame 43; the adjusting mechanism comprises connecting rods 38 which are hinged with each other, two pairs of connecting rods 38 are arranged, and the connecting rods 38 are respectively and rotatably connected with the first connecting frame 34 and the second connecting frame 43; dead lever 39, dead lever 39 fixed connection are on second link 43, and fixedly connected with riser 310 on the first link 34, are equipped with the bar hole of being connected with dead lever 39 cooperation on the riser 310, and dead lever 39 passes through nut and bar hole fixed connection, when to pinch roller 31 altitude mixture control, can guarantee through adjustment mechanism that the high position of ring gear 42 is unchangeable.

The invention also discloses a wrapping method of the heat preservation foam of the low-pressure pipeline of the refrigerating system, and the wrapping device is utilized, and the wrapping method comprises the following steps:

s1, the tubular foam 12 and the pipeline 5 are respectively arranged on the upper side and the lower side of the movable frame 1, the foam 12 penetrates through the guide ring 9 and the through hole 7, and the pipeline 5 penetrates through the annular frame 2;

s2, the moving frame 1 moves forwards along the surface of the pipeline 5, the cutting knife 10 cuts one side, close to the pipeline 5, of the bottom of the foam 12 in the moving process, the cut foam 12 is unfolded by the unfolding mechanism 6, the foam 12 is conveniently wrapped on the surface of the pipeline 5, and then the foam 12 is wrapped on the surface of the pipeline 5 through the pressing wheel 31;

s3, the pinch roller 31 rotates and simultaneously drives the gear 46 to rotate, the gear 46 drives the gear ring 42 to rotate, the adhesive tape roll 49 is further driven to do circular motion along the outer side of the pipeline 5, and the foam 12 is wrapped on the pipeline 5 through the adhesive tape.

Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat preservation foam wrapping device for a low-pressure pipeline of a refrigeration system, which is characterized in that,

the device comprises a moving frame (1) sliding along the surface of a pipeline (5), foam (12) and the pipeline (5) are respectively arranged on the upper surface and the lower surface of the moving frame (1), two ends of the moving frame (1) are fixedly connected with annular frames (2) in sliding connection with the surface of the pipeline (5), and the pipeline (5) penetrates through the annular frames (2);

a through hole (7) is formed in the moving frame (1), the foam (12) penetrates through the through hole (7), and a pressing mechanism (3) used for wrapping the foam (12) on the surface of the pipeline (5) is arranged on the moving frame (1);

the device is characterized in that a cutting knife (10) used for cutting the foam (12) is fixedly connected to the moving frame (1), a spreading mechanism (6) used for spreading the foam from a cut seam is arranged on the moving frame (1), and a guide ring (9) matched with the foam is arranged on the moving frame (1).

2. The insulating foam wrapping device for the low-pressure pipeline of the refrigerating system as claimed in claim 1, wherein the annular frame (2) comprises a pair of arc hoops (21) which are rotatably connected with each other, and one ends of the two arc hoops (21) are rotatably connected through a connecting block (22);

and a plurality of rollers (24) are arranged on the inner surface of the arc hoop (21) along the radial direction of the arc hoop, a threaded rod (23) is connected to the rollers (24) in a rotating mode, and the threaded rod (23) is in threaded connection with the arc hoop (21).

3. The insulation foam wrapping device for the low-pressure pipeline of the refrigerating system according to claim 2, wherein one end of one of the arc-shaped hoops (21) is rotatably connected with a clamping rod (25), one end of the other arc-shaped hoop (21) is provided with a clamping groove (26) matched and connected with the clamping rod (25), a stop block (28) is arranged at the end of the clamping rod (25), a spring (27) and a pressing sheet (29) are movably connected to the clamping rod (25), and the spring (27) is arranged between the pressing sheet (29) and the stop block (28).

4. The device for wrapping the insulation foam of the low-pressure pipeline of the refrigerating system according to claim 3, wherein the opening mechanism comprises:

the pair of sliding blocks (64), and a stay bar (65) for spreading the foam is fixedly connected to the sliding blocks (64);

the fixing blocks (66) are arranged on two sides of the through hole (7) respectively, a U-shaped frame (61) is fixedly connected between the two fixing blocks (66), a sliding rod (62) is fixedly connected between the U-shaped frame (61) and the fixing blocks (66), and the sliding block (64) is connected to the sliding rod (62) in a sliding mode.

5. The device for wrapping the heat preservation foam of the low-pressure pipeline of the refrigerating system as claimed in claim 4, wherein a screw rod (63) is rotatably connected to the U-shaped frame (61), opposite thread lines are arranged at two ends of the screw rod (63), and the two sliding blocks (64) are respectively in threaded connection with two ends of the screw rod (63);

the through hole (7) is symmetrically and fixedly connected with a pair of slide rails (11) which are in sliding fit with the fixing block (66), and the fixing block (66) is fixedly connected onto the slide rails (11) through bolts.

6. The device for wrapping the heat preservation foam of the low-pressure pipeline of the refrigerating system as claimed in claim 5, wherein the pressing mechanism (3) comprises a pressing wheel frame (32), a pressing wheel (31) is rotatably connected in the pressing wheel frame (32), and a connecting rod (33) is fixedly connected on the pressing wheel frame (32);

remove fixedly connected with support (8) on frame (1), connecting rod (33) with support (8) fixed connection, be equipped with on support (8) with connecting rod (33) fixed connection's connecting hole.

7. The heat-preservation foam packaging device for the low-pressure pipeline of the refrigeration system as claimed in claim 6, wherein the movable frame (1) is provided with a winding mechanism (4) for fixing foam on the surface of the pipeline, the winding mechanism (4) comprises a fixing ring (41), the fixing ring (41) is sleeved on the outer side of the pipeline (5), the surface of the fixing ring (41) is rotatably connected with a gear ring (42), the gear ring (42) is fixedly connected with a fixing frame (47), the fixing frame (47) is rotatably connected with an adhesive tape roller (48), and the adhesive tape roller (48) is connected with an adhesive tape roll (49).

8. The device for wrapping the heat preservation foam of the low-pressure pipeline of the refrigerating system as claimed in claim 7, wherein a first connecting frame (34) is fixedly connected to the pressing wheel frame (32), a second connecting frame (43) is fixedly connected to the fixing ring (41), and an adjusting mechanism for adjusting the distance between the first connecting frame (34) and the second connecting frame (43) is connected between the first connecting frame (34) and the second connecting frame (43);

the adjustment mechanism includes:

the connecting rods (38) are hinged to each other, and the connecting rods (38) are respectively connected with the first connecting frame (34) and the second connecting frame (43) in a rotating mode;

dead lever (39), dead lever (39) fixed connection be in on second link (43), just fixedly connected with riser (310) on first link (34), be equipped with on riser (310) with dead lever (39) cooperation is connected the bar hole.

9. The insulation foam wrapping device for the low-pressure pipeline of the refrigerating system as claimed in claim 8, wherein a first rotating shaft (35) rotating coaxially and integrally is fixedly connected to the pressing wheel (31), a second rotating shaft (44) is rotatably connected to the second connecting frame (43), and the first rotating shaft (35) and the second rotating shaft (44) are in transmission connection through a belt line (37) and a belt pulley (36);

the second connecting frame (43) is rotatably connected with a third rotating shaft (45), one end of the third rotating shaft (45) is fixedly connected with a gear (46) meshed with the gear ring (42), and the third rotating shaft (45) is rotatably connected with the second rotating shaft (44) through a bevel gear in a meshed mode.

10. A method for wrapping heat preservation foam of a low-pressure pipeline of a refrigerating system is characterized by comprising the following steps:

s1, tubular foam (12) and a pipeline (5) are respectively arranged on the upper side and the lower side of the movable frame (1), the foam (12) penetrates through the guide ring (9) and the through hole (7), and the pipeline (5) penetrates through the annular frame (2);

s2, the moving frame (1) moves forwards along the surface of the pipeline (5), in the moving process, the cutting knife (10) cuts one side, close to the pipeline (5), of the bottom of the foam (12), the spreading mechanism (6) spreads the cut foam (12), the foam (12) is conveniently wrapped on the surface of the pipeline (5), and then the foam (12) is wrapped on the surface of the pipeline (5) through the pressing wheel (31);

s3, the pinch roller (31) rotates and simultaneously drives the gear (46) to rotate, the gear (46) drives the gear ring (42) to rotate, the adhesive tape roll (49) is further driven to do circular motion along the outer side of the pipeline (5), and the foam (12) is wrapped on the pipeline (5) through the adhesive tape.