CN210646951U

CN210646951U - Overhead polyurethane continuous spraying direct-buried heat preservation production line

Info

Publication number: CN210646951U
Application number: CN201921422465.0U
Authority: CN
Inventors: 李光远; 李楠
Original assignee: Deshida Tianjin Pipeline Equipment Co ltd
Current assignee: Deshida Tianjin Pipeline Equipment Co ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-06-02
Anticipated expiration: 2029-08-29

Abstract

The utility model provides a formula of directly burying heat preservation production line is sprayed in succession to aerial polyurethane, including first deposit the platform, with first before depositing the spraying raceway transfer chain that the platform is connected, the spray booth that is connected with the raceway transfer chain before the spraying, the platform is deposited to the second that the overhead transfer chain is connected after the spraying that is connected with the export of spray booth and after the spraying overhead transfer chain is connected, the overhead transfer chain includes pocket belting and strutting arrangement after the spraying, is provided with the pipe puller between pocket belting and the strutting arrangement, the utility model discloses a mode that pocket belting and strutting arrangement combined together carries out the empty formula of support frame to the tubular product after the polyurethane spraying and removes, has effectively reduced the area of contact of tubular product after the spraying with the riding wheel, and the protection polyurethane layer is not destroyed, and overall structure is simple, convenient operation, and the transportation is stable.

Description

Overhead polyurethane continuous spraying direct-buried heat preservation production line

Technical Field

The utility model belongs to the technical field of production facility, especially, relate to an overhead polyurethane continuous spraying directly buries formula heat preservation production line.

Background

Since the advent of polyurethane synthetic materials in the thirty years, polyurethane thermal insulation pipes have been developed rapidly as excellent thermal insulation materials, and their application range is becoming wider and wider, and because of their simple construction and remarkable energy-saving and corrosion-resistant effects, they are used in large quantities in various pipes for heating, refrigeration, oil and gas transportation, and at present, in the polyurethane spraying production line, the way of transporting the pipes after the spraying process is completed includes: firstly, the steel pipe is dragged by a riding wheel to spirally advance, but after polyurethane is sprayed on the steel pipe, when the steel pipe continues to advance on the riding wheel, because the strength of the polyurethane just sprayed is low, the steel pipe is continuously extruded and sheared by the riding wheel along with the rotation of the steel pipe, and the internal structure of polyurethane foam is damaged, therefore, the method is not suitable for producing the heat-insulating pipe with larger pipe diameter; secondly, as saying in the continuous spraying of patent No. 201520038168.1 overhead polyurethane directly buried insulating tube production line, insulating tube one end after the spraying is stretched into the steel pipe inner wall chucking and with the synchronous rotation of steel pipe and synchronous advancing by chuck six claws on the chuck trailer, the other end is supported by the riding wheel of riding wheel transfer chain, the tubular product after the spraying is built on stilts, only 6.7% tubular product is supported by the pocket area, can not cause the injury to polyurethane, but the chuck structure that this method adopted is complicated, the easy oil leak of hydraulic control, lead to the process of tightening to tubular product unstable, the easy condition that takes place to drop.

Disclosure of Invention

The to-be-solved problem of the utility model is to provide a direct-burried heat preservation production line of overhead polyurethane continuous spraying of simple structure, convenient operation, operation stability.

In order to solve the technical problem, the utility model discloses a technical scheme is: an overhead polyurethane continuous spraying direct-buried heat preservation production line comprises a first storage platform, a pre-spraying raceway conveying line connected with the first storage platform, a spraying chamber connected with the pre-spraying raceway conveying line, a post-spraying overhead conveying line connected with an outlet of the spraying chamber, and a second storage platform connected with the post-spraying overhead conveying line, wherein the post-spraying overhead conveying line comprises a pocket belt device and a supporting device, a pipe poking device is arranged between the pocket belt device and the supporting device, the pocket belt device is fixedly arranged on a supporting bottom plate, a fixing bottom plate is arranged at the lower end of the supporting bottom plate, a first roller is arranged at the lower end of the fixing bottom plate, the first roller is positioned on a sliding rail, a hydraulic four-connecting-rod lifting device is arranged on the supporting device, the hydraulic four-connecting-rod lifting device is fixedly arranged on a base, and a second roller is arranged at the lower end of the base, the second roller is positioned on the sliding rail.

Further, the pocket belt device comprises a fixed support column and a movable support column which are arranged on the support base plate relatively, a sleeve is arranged on the fixed support column, two parallel structural plates which are arranged on the outer side of the movable support column relatively and fixedly, two tensioning wheels which are arranged between the structural plates relatively, two guide wheels which are arranged between the tensioning wheels, and a lifting power mechanism which is arranged on the tensioning wheels and the guide wheels in a sleeved mode, wherein the outer side of the movable support column is of a square structure, two ends of the structural plates are fixedly connected with two movable support column bolts respectively, and two ends of the tensioning wheels are provided with tensioning mechanisms.

Furthermore, the lifting power mechanism comprises a hydraulic cylinder fixedly arranged on the supporting bottom plate and an oil cylinder supporting frame fixedly arranged at the free end of the hydraulic cylinder, the oil cylinder supporting frame is fixed on the structural plate through a bolt, and the oil cylinder supporting frame is fixedly connected with the movable supporting column through a connecting rod.

Furthermore, the tensioning mechanism comprises an outer spherical ball bearing which is arranged on the structural plate in a penetrating mode, a part, located inside the structural plate, of the outer spherical ball bearing is connected with the tensioning wheel through bolts, a part, located outside the structural plate, of the outer spherical ball bearing is provided with a sliding block seat, sliding ways are arranged on the structural plate in parallel, a baffle is arranged between the two sliding ways, the sliding block seat is arranged in the sliding ways in a sliding mode, a T-shaped groove is formed in the sliding block seat, a pulling block is arranged in the T-shaped groove, a screw rod is arranged perpendicular to the pulling block, the other end of the screw rod penetrates through the T-shaped groove and the baffle, and the screw rod is in threaded connection with the.

Furthermore, the supporting device comprises a fixed frame fixedly arranged on the hydraulic four-bar linkage lifting device and a foldable supporting rubber wheel mechanism arranged on the fixed frame, the fixed frame sequentially comprises a first horizontal part, a trapezoidal protruding part and a second horizontal part from left to right, the first horizontal part, the trapezoidal protruding part and the second horizontal part are integrally formed, the foldable supporting rubber wheel mechanism comprises a fixed rod, a rubber wheel fixing device and a first hydraulic rod, the fixed rod is obliquely arranged on the first horizontal part and the second horizontal part respectively, the rubber wheel fixing device is hinged to the fixed rod, the first hydraulic rod is arranged on the inclined plane of the trapezoidal protruding part, the free end of the first hydraulic rod is fixedly connected with the rubber wheel fixing device, and the first hydraulic rod is arranged in parallel with the fixed rod.

Furthermore, the fixed rod and the first horizontal part and the second horizontal part form an included angle a, and the included angle a ranges from 30 degrees to 70 degrees.

Further, rubber tyer fixing device includes H type dead lever, H type dead lever is by supreme first recess, entity portion and the second recess of including in proper order down, be provided with the through-hole on the lateral wall of first recess, the dead lever setting is connected through-hole and bolt hinge in first recess, the free end of first hydraulic stem with entity portion fixed connection, be provided with the rubber tyer stationary blade on the lateral wall of second recess relatively, be provided with the rubber tyer between the rubber tyer stationary blade.

Furthermore, the number of the pipe poking devices is more than 2, and each pipe poking device comprises a second hydraulic rod and a pipe poking arm hinged with the second hydraulic rod.

Further, the tube pulling arm comprises a first arm lever and a second arm lever, the angle of the joint of the first arm lever and the second arm lever is b, and the angle b ranges from 100 degrees to 135 degrees.

Further, the length of first armed lever is greater than the length of second armed lever, the below of the free end of first armed lever is provided with the draw-in groove.

Compared with the prior art, the utility model has the advantages and beneficial effect be:

1. the utility model discloses a mode that pocket area device and strutting arrangement combined together carries out the empty formula of support frame to tubular product after the polyurethane spraying and removes, and the effectual area of contact who reduces tubular product after the spraying and riding wheel protects the polyurethane layer not destroyed, and overall structure is simple, convenient operation, and the transportation is stable.

2. The utility model discloses a pocket belting utilizes lifting power unit to control its lift, at first controls the height that highly is less than the spray booth of pocket belting, and when the tubular product that just spraying was accomplished was located pocket belting top, the control pocket belting rose and held tubular product, and tubular product continues to rotate forward through the support of pocket belting and gos forward, simultaneously, sets up straining device in pocket belting, can adjust the distance between the take-up pulley to make its tubular product that adapts to different diameters, the operation is convenient with the regulation.

3. The utility model discloses a strutting arrangement utilizes its lift of hydraulic pressure four connecting rod elevating gear control, can control and keep away from the pocket after taking the certain distance when the head end of tubular product, and control strutting arrangement rises for support the tubular product after the spraying, can effectively prevent that the polyurethane layer of spraying from being destroyed, strutting arrangement can effectively adjust the distance between the rubber tyer through controlling first hydraulic stem simultaneously, thereby realizes the supporting role to different diameter tubular products, simple structure, convenient operation, stability.

Drawings

FIG. 1 is a schematic structural view of an overhead polyurethane continuous spraying direct-buried heat preservation production line of the utility model.

Fig. 2 is the utility model discloses a structural schematic diagram of pocket area device in overhead polyurethane continuous spraying direct-burried formula heat preservation production line.

Fig. 3 is an enlarged view at a in fig. 2.

Fig. 4 is a left side view structural schematic diagram of fig. 2 having a partial sectional structure.

Fig. 5 is an enlarged view at C in fig. 4.

Fig. 6 is a structural view of a section B-B of fig. 2 having a partial sectional structure.

Fig. 7 is a schematic structural view of the supporting device in the overhead polyurethane continuous spraying direct-buried heat preservation production line of the utility model.

Fig. 8 is a schematic structural view of the rubber wheel fixing device in the overhead polyurethane continuous spraying direct-buried heat preservation production line of the utility model.

Fig. 9 is a schematic structural view of a pipe poking device in the overhead polyurethane continuous spraying direct-buried heat preservation production line of the present invention.

In the figure: 1-a first storage platform; 2-spraying a front roller conveyor line; 3-a spraying chamber; 4, making the conveyor line overhead after spraying; 5-a second storage platform; 6-belt-wrapping device; 7-a support device; 8-pipe puller; 9-hydraulic four-bar linkage lifting device; 10-a base; 11-a second roller; 12-a slide rail; 13-a support floor; 14-a first roller; 15-fixing the bottom plate; 601-fixed support columns; 602-a movable support column; 603-structural plates; 604-a tensioner; 605-a guide wheel; 606-pocket belt; 607-a lifting power mechanism; 608-a tensioning mechanism; 6071-hydraulic cylinder; 6072-cylinder support; 6073-connecting rod; 6081-insert ball bearing; 6082-slider seat; 6083-slide; 6084-baffle; 6085-T-shaped groove; 6086-pull block; 6087-wire lever; 701-a fixing frame; 702-a collapsible supporting rubber wheel mechanism; 7011-a first horizontal section; 7012-trapezoidal projection; 7013-a second horizontal section; 7021-a fixation rod; 7022-rubber wheel fixing device; 7023-a first hydraulic ram; 7022-1-first groove; 7022-2-solid portion; 7022-3-second groove; 7022-4-via; 7022-5-rubber wheel stator; 7022-6-rubber wheel; 801-second hydraulic ram; 802-a tube-pulling arm; 8021-a first arm; 8022-a second arm; 8023-card slot.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1-9, an overhead polyurethane continuous spraying direct-buried heat preservation production line comprises a first storage platform 1, a pre-spraying roller conveyor line 2 connected with the first storage platform 1, a spraying chamber 3 connected with the pre-spraying roller conveyor line 2, a post-spraying overhead conveyor line 4 connected with an outlet of the spraying chamber 3, and a second storage platform 5 connected with the post-spraying overhead conveyor line 4, wherein the post-spraying overhead conveyor line 4 comprises a belt-holding device 6 and a supporting device 7, a pipe-pulling device 8 is arranged between the belt-holding device 6 and the supporting device 7, the belt-holding device 6 is fixedly arranged on a supporting base plate 13, a fixed base plate 15 is arranged at the lower end of the supporting base plate 13, a first roller 14 is arranged at the lower end of the fixed base plate 15, the first roller 14 is arranged on a sliding rail 12, a hydraulic four-link lifting device 9 is arranged on the supporting device 7, the hydraulic four-bar lifting device 9 is fixedly arranged on a base 10, a second roller 11 is arranged at the lower end of the base 10, the second roller 11 is positioned on a slide rail 12, the derusted pipe is stored on a first storage platform 1, the derusted pipe is dialed by a pipe dialing device 8 from the first storage platform 1 to a pre-spraying raceway conveying line 2 and is conveyed to a spraying chamber 3 by the pre-spraying raceway conveying line 2, the pipe passes through the spraying chamber 3 and is sprayed, the head end of the pipe passes through the spraying chamber 3, then the pipe is supported by a belt loading device 6 and continues to rotate forwards, when the head end of the pipe is about 1.5 m away from the belt loading device 6, the pipe is supported by a supporting device 7 and rotates forwards along with the pipe, and when the whole pipe is separated from the spraying chamber 3, the pipe dialed by the pipe dialing device 8 on the post-spraying overhead conveying line 4 is dialed to the second storage platform 5, carry out the operation of next process, consequently, the utility model discloses a mode that pocket area device 6 and strutting arrangement 7 combined together carries out the empty formula of support frame to the tubular product after the polyurethane spraying and removes, and the effectual area of contact who has reduced tubular product after the spraying and riding wheel protects the polyurethane layer not destroyed, overall structure is simple, convenient operation, and the transportation is stable.

Further, the belt-holding device 6 includes a fixed support column 601 oppositely disposed on the support base 13, a movable support column 602 sleeved on the fixed support column 601, two parallel structure plates 603 oppositely and fixedly disposed outside the movable support column 602, a tension wheel 604 oppositely disposed between the two structure plates 603, a guide wheel 605 disposed between the two tension wheels 604, a belt-holding 606 sleeved on the tension wheel 604 and the guide wheel 605, and a lifting power mechanism 607 fixedly disposed with the movable support column 602, the outside of the movable support column 602 is a square structure, two ends of the structure plate 603 are respectively fixedly connected with the two movable support columns 602 by bolts, two ends of the tension wheel 604 are respectively provided with a tensioning mechanism 608, the belt-holding device 6 is configured by sleeving the movable support column 602 on the fixed support column 601, the lifting power mechanism 607 drives the two structure plates 603 and the movable support column 602 to move upward, thereby can adjust the height of pocket area device 6, tensioning mechanism 608 can adjust the distance between two take-up pulleys 604 in addition, can effectively adjust the tensity of pocket area 606, can make its tubular product that adapts to different diameters simultaneously, and leading wheel 605 plays the effect of direction, prevents that the pocket area is skew, and leading wheel 605 passes through bearing frame and structural slab fixed connection.

Further, power lift mechanism 607 is in including fixed the setting pneumatic cylinder 6071 and the fixed setting on the supporting baseplate 13 are in the hydro-cylinder support frame 6072 of pneumatic cylinder 6071 free end, hydro-cylinder support frame 6072 bolt fastening be in on the structural slab 603, through hydro-cylinder support frame 6072's setting, drive whole structural slab 603 and the mechanism on it together go up and down when can making pneumatic cylinder 6071 go up and down, hydro-cylinder support frame 6072 pass through connecting rod 6073 with movable support column 602 fixed connection utilizes connecting rod 6073 further to be connected with movable support column 602, can strengthen the stability that pocket belting 6 goes up and down.

Further, the tensioning mechanism 608 includes an outer spherical ball bearing 6081 penetrating the structural plate 603, a part of the outer spherical ball bearing 6081 located inside the structural plate 603 is connected to the tensioning wheel 604 by a bolt, a part of the outer spherical ball bearing 6081 located outside the structural plate 603 is provided with a slider seat 6082, the structural plate 603 is provided with parallel sliding ways 6083, a baffle 6084 is arranged between the two sliding ways 6083, the slider seat 6082 is slidably arranged inside the sliding ways 6083, the slider seat 6082 is provided with a T-shaped groove 6085, a pull block 6086 is arranged inside the T-shaped groove 6085, a wire lever 6087 is arranged perpendicular to the pull block 6086, the other end of the wire lever 6087 penetrates through the T-shaped groove 6085 and the baffle 6084, the wire lever 6087 is in threaded connection with the baffle 6084, by rotating the wire lever 6087, the pull block 6086 at the other end of the wire lever 6087 pulls the slider seat 6082 in the T-shaped groove 6083, thereby driving the outer spherical surface ball bearing 6081 and further driving the tension wheel 604 to move, and effectively achieving the effect of adjusting the tension wheel 604.

Further, the supporting device 7 includes a fixed frame 701 fixedly disposed on the hydraulic four-bar linkage lifting device 9 and a foldable supporting rubber wheel mechanism 702 disposed on the fixed frame 701, the fixed frame 701 sequentially includes a first horizontal portion 7011, a trapezoidal protruding portion 7012 and a second horizontal portion 7013 from left to right, the first horizontal portion 7011, the trapezoidal protruding portion 7012 and the second horizontal portion 7013 are integrally formed, the foldable supporting rubber wheel mechanism 702 includes a fixing rod 7021 obliquely disposed on the first horizontal portion 7011 and the second horizontal portion 7012, a rubber wheel fixing device 7022 hinged to the fixing rod 7021, and a first hydraulic rod 7023 disposed on an inclined surface of the trapezoidal protruding portion 7012, a free end of the first hydraulic rod 7023 is fixedly connected to the rubber wheel fixing device 7022, the first hydraulic rod 7023 is disposed in parallel to the fixing rod 7021, and the fixing rod 7021 is obliquely disposed on the horizontal portion, the structure setting of mount 701 can guarantee that first hydraulic stem 7023 and dead lever 7021 level set up to collapsible support rubber tyer mechanism 702 is connected with dead lever 7021 is articulated, is convenient for first hydraulic stem 7023 to the regulation of collapsible support rubber tyer mechanism 702.

Furthermore, the fixed rod 7021 and the first horizontal portion 7011 and the second horizontal portion 7013 form an included angle a, which ranges from 30 ° to 70 °, so that the distance between the rubber wheels can be effectively adjusted when the first hydraulic rod 7023 is extended or shortened.

Further, the rubber wheel fixing device 7022 comprises an H-shaped fixing rod, the H-shaped fixing rod sequentially comprises a first groove 7022-1, an entity portion 7022-2 and a second groove 7022-3 from bottom to top, a through hole 7022-4 is formed in the side wall of the first groove 7022-1, the fixing rod 7021 is arranged in the first groove 7022-1 and is hinged to the first groove 7022-4 through a bolt, the free end of the first hydraulic rod 7023 is fixedly connected with the entity portion 7022-2, a rubber wheel fixing piece 7022-5 is oppositely arranged on the side wall of the second groove 7022-3, and a rubber wheel 7022-6 is arranged between the rubber wheel fixing pieces 7022-5.

Furthermore, the number of the pipe poking devices 8 is more than 2, each pipe poking device 8 comprises a second hydraulic rod 801 and a pipe poking arm 802 hinged to the second hydraulic rod 801, and by arranging the two groups of pipe poking devices 8, the heat preservation pipes which are sprayed conveniently enter the second storage platform 5 through the pipe poking devices 8.

Further, the tube pulling arm 802 comprises a first arm rod 8021 and a second arm rod 8022, an angle b at a connection position of the first arm rod 8021 and the second arm rod 8022 is in a range of 100 degrees to 135 degrees, and the tube pulling arm can adapt to heat preservation tubes with different tube diameters.

Further, the length of the first arm rod 8021 is greater than the length of the second arm rod 8022, a clamping groove 8023 is arranged below the free end of the first arm rod 8021, the sprayed heat preservation pipe is clamped on the second storage platform 5 by controlling the second hydraulic rod 801 to ascend, the second hydraulic rod 801 is further ascended, and the second arm rod 8022 continues to move upwards, so that the heat preservation pipe is pushed onto the second storage platform 5.

The utility model discloses a working process does: the derusted pipe is stored on a first storage platform 1, the derusted pipe is dialed by a pipe dialing device 8 from the first storage platform 1 to a pre-spraying roller path conveying line 2 and is conveyed to a spraying chamber 3 by the pre-spraying roller path conveying line 2, the head end of the pipe passes through the spraying chamber 3 after the pipe is sprayed by the spraying chamber 3, the belt-pocket device 6 is lifted by the hydraulic four-bar linkage lifting device 9, is supported by the belt-pocket device 6 and continues to rotate forwards, when the head end of the pipe is about 1.5 m away from the belt-holding device, the hydraulic four-bar lifting device 9 is controlled to ascend, so that the supporting device 7 supports the pipe, and advances along with the pipe rotation, and after whole pipe breaks away from spray booth 3, dials the pipe behind the spraying to second storage platform 5 by the pipe ware 8 on the overhead transfer chain 4 behind the spraying, and simultaneously, strutting arrangement 7 gets back to preset position, carries out the operation of next process.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The utility model provides an overhead polyurethane continuous spraying directly buries formula heat preservation production line which characterized in that: comprises a first storage platform, a pre-spraying raceway conveying line connected with the first storage platform, a spraying chamber connected with the pre-spraying raceway conveying line, a post-spraying overhead conveying line connected with an outlet of the spraying chamber, and a second storage platform connected with the post-spraying overhead conveying line, the overhead conveying line after spraying comprises a belt-holding device and a supporting device, a pipe-poking device is arranged between the belt-holding device and the supporting device, the belt-holding device is fixedly arranged on the supporting bottom plate, the lower end of the supporting bottom plate is provided with a fixed bottom plate, the lower end of the fixed bottom plate is provided with a first roller which is positioned on the slide rail, the supporting device is provided with a hydraulic four-bar lifting device, the hydraulic four-bar lifting device is fixedly arranged on the base, a second roller is arranged at the lower end of the base, and the second roller is located on the sliding rail.

2. The overhead polyurethane continuous spraying direct-buried heat preservation production line of claim 1, characterized in that: the pocket belt device comprises a fixed support column and a movable support column, wherein the fixed support column and the fixed support column are arranged on a support base plate in a relative mode, the movable support column is arranged on the fixed support column, two parallel structure plates are fixedly arranged on the outer side of the movable support column in a relative mode, a tensioning wheel and two tensioning wheels are arranged between the structure plates in a relative mode, guide wheels and sleeves are arranged between the tensioning wheels, the pocket belt is arranged on the tensioning wheels and the guide wheels, the lifting power mechanism is fixedly arranged on the movable support column, the outer side of the movable support column is of a square structure, the two ends of the structure plates are fixedly connected with two movable support column bolts respectively, and tensioning mechanisms.

3. The overhead polyurethane continuous spraying direct-buried heat preservation production line of claim 2, characterized in that: the lifting power mechanism comprises a hydraulic cylinder fixedly arranged on the supporting bottom plate and an oil cylinder supporting frame fixedly arranged at the free end of the hydraulic cylinder, the oil cylinder supporting frame is fixed on the structural plate through bolts, and the oil cylinder supporting frame is fixedly connected with the movable supporting column through a connecting rod.

4. The overhead polyurethane continuous spraying direct-buried heat preservation production line of claim 2, characterized in that: the tensioning mechanism comprises an outer spherical ball bearing which is arranged on the structural plate in a penetrating mode, the outer spherical ball bearing is located in partial bolt connection inside the structural plate, the tensioning wheel is arranged on the portion, outside the structural plate, of the outer spherical ball bearing, sliding block seats are arranged on the portion, outside the structural plate, of the outer spherical ball bearing in a parallel mode, a baffle is arranged between the two sliding blocks, the sliding block seats are arranged in the sliding blocks in a sliding mode, T-shaped grooves are formed in the sliding block seats, pulling blocks are arranged in the T-shaped grooves and are perpendicular to the pulling blocks, screw rods are arranged at the other ends of the screw rods and penetrate through the T-shaped grooves and the baffle, and the screw rods.

5. The overhead polyurethane continuous spraying direct-buried heat preservation production line of claim 1, characterized in that: the supporting device comprises a fixed frame and a foldable supporting rubber wheel mechanism, the fixed frame is fixedly arranged on the hydraulic four-connecting-rod lifting device and is arranged on the fixed frame, the fixed frame sequentially comprises a first horizontal part, a trapezoidal protruding part and a second horizontal part from left to right, the first horizontal part, the trapezoidal protruding part and the second horizontal part are integrally formed, the foldable supporting rubber wheel mechanism comprises a fixed rod, a rubber wheel fixing device and a first hydraulic rod, the fixed rod is hinged to the rubber wheel fixing device, the rubber wheel fixing device is connected with the fixed rod in an inclined mode, the rubber wheel fixing device is fixedly connected with the rubber wheel fixing device, and the first hydraulic rod is arranged in parallel with the fixed rod.

6. The overhead polyurethane continuous spraying direct-buried heat preservation production line of claim 5, characterized in that: the included angle formed by the fixing rod and the first horizontal part and the included angle formed by the fixing rod and the second horizontal part are both a, and the range of the included angle a is 30-70 degrees.

7. The overhead polyurethane continuous spraying direct-buried heat preservation production line of claim 5, characterized in that: rubber tyer fixing device includes H type dead lever, H type dead lever includes first recess, entity portion and second recess by supreme down in proper order, be provided with the through-hole on the lateral wall of first recess, the dead lever sets up and connects through-hole and bolt hinge in first recess, the free end of first hydraulic stem with entity portion fixed connection, be provided with the rubber tyer stationary blade on the lateral wall of second recess relatively, be provided with the rubber tyer between the rubber tyer stationary blade.

8. The overhead polyurethane continuous spraying direct-buried heat preservation production line of claim 1, characterized in that: the number of the pipe poking devices is more than 2, and each pipe poking device comprises a second hydraulic rod and a pipe poking arm hinged with the second hydraulic rod.

9. The overhead polyurethane continuous spraying direct-buried heat preservation production line of claim 8, characterized in that: the pipe poking arm comprises a first arm lever and a second arm lever, the angle of the joint of the first arm lever and the second arm lever is b, and the angle b ranges from 100 degrees to 135 degrees.

10. The overhead polyurethane continuous spraying direct-buried heat preservation production line of claim 9, characterized in that: the length of first armed lever is greater than the length of second armed lever, the below of the free end of first armed lever is provided with the draw-in groove.