A device and construction method for pre-coating polyurethane pipe shell before cold insulation layer construction

Abstract

The present invention relates to a device and construction method for pre-coating polyurethane tube shells before cold insulation layer construction, and relates to the technical field of cold insulation construction. The device comprises a frame, a rubber material storage box, and a placement rack for fixing the polyurethane tube shells. The device is characterized by further comprising a coating transmission structure, the coating transmission structure comprising a transmission rod and a stand coaxially connected to the transmission rod, a coating head connected to the top of the stand, a slide rod provided on one side of the coating head for sliding engagement with a positioning slider, and a main drive assembly for rotating the transmission rod and the placement rack. The present invention utilizes the device to pre-coat the polyurethane tube shells with a rubber asphalt waterproofing adhesive, which can then be directly transported to the construction site for cold insulation layer installation after drying. Compared to traditional cold insulation layer construction methods, the device is simple and easy to operate, saves manpower, eliminates safety hazards, reduces material waste and environmental pollution, and significantly improves construction efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of cold insulation construction, and particularly relates to a device and a construction method for pre-coating a polyurethane pipe shell before construction of a cold insulation layer. Background Art

[0002] In industrial production, due to process requirements, the cold fluid is required to have a certain temperature. If effective thermal insulation measures are not adopted, the fluid temperature will rise due to the loss of cold during transportation, and it will not meet the process temperature requirements. Therefore, in refrigeration equipment or projects, insulation materials are often used to keep some pipes or key parts cold. The cold insulation structure is generally composed of an anti-rust layer, a cold insulation layer, a moisture-proof layer (or vapor barrier layer), a protective layer, an anti-corrosion and identification layer from the inside to the outside. The cold insulation layer is currently commonly used for polyurethane pipe shells. The moisture-proof layer is a waterproof material covering the outside of the polyurethane pipe shell. Commonly used materials include asphalt mastic, aluminum foil kraft paper, aluminum foil fiberglass cloth and rubber asphalt waterproofing compound.

[0003] The traditional cold insulation layer construction method involves first applying the polyurethane pipe shell to the equipment and pipe using a bundling method, then tightening and positioning it with strapping materials. Then, mastic or rubber asphalt waterproofing compound is applied to the polyurethane pipe shell, which is then wrapped with polyurethane waterproofing membrane, and finally, the pipe protective layer is installed. Applying rubber asphalt waterproofing compound presents the following technical issues: First, applying the compound to the lower half of the pipe is difficult, often resulting in uneven application, slow construction progress, and low efficiency. Second, the application material drips, resulting in significant material waste and potentially adversely affecting the environment. Third, in shady construction environments, the required drying temperature cannot be achieved within a short period of time. Fourth, when workers apply the compound from low to high, the paint can drip onto their faces, posing a safety hazard. As can be seen from the above, the traditional cold insulation layer construction method can no longer meet the high workload and extremely high efficiency requirements, and construction improvements are crucial. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and construction method for pre-coating a polyurethane pipe shell before construction of a cold insulation layer in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] The present invention provides a device for pre-coating polyurethane tube shells before the construction of a cold insulation layer, comprising a frame, a rubber material storage box, and a placement rack for fixing the polyurethane tube shells. The device is characterized in that it also includes a coating transmission structure, the coating transmission structure includes a transmission rod and a vertical frame coaxially connected to the transmission rod, the top end of the vertical frame is connected to a coating head, and one side of the coating head is provided with a slide rod that slidably cooperates with a positioning slider; and

[0007] A main drive assembly that drives the transmission rod and the placement rack to rotate;

[0008] The transmission rod swings under the drive of the main drive assembly, driving the coating head on the coaxially connected vertical frame to dip the rubber in the rubber storage box in a right-angle swing path, and at the same time cooperates with the main drive assembly to drive the polyurethane tube shell fixed on the placement rack to rotate, so as to apply the rubber asphalt waterproofing rubber on the polyurethane tube shell.

[0009] As a further optimization scheme of the present invention, the main drive assembly includes a chassis, a drive motor, a pulley group, a first semicircular gear and a second semicircular gear, the middle of the first semicircular gear and the second semicircular gear are sleeved with a second drive shaft, the two second drive shafts are axially connected to the pulley group, and the active end of the pulley group is connected to the drive motor

[0010] As a further optimization scheme of the present invention, the main drive assembly also includes a first driven gear meshing with the second semicircular gear for transmission, and a second driven gear meshing with the first semicircular gear for transmission, the second driven gear is axially connected to the placement rack, the first driven gear is axially connected to the first drive shaft, the other end of the first drive shaft is axially connected to a rocker arm, the outer end of the rocker arm is hinged to a linkage rod, and the other end of the linkage rod is hinged to the transmission rod.

[0011] As a further optimization solution of the present invention, the exterior of the positioning slider is rotatably matched with the stand by providing a rotating shaft.

[0012] As a further optimization scheme of the present invention, the placement rack includes a cylindrical rack, a rotating motor is provided in the middle position inside the cylindrical rack, the driving end of the rotating motor is connected to a rotating seat and two pneumatic rods are connected to the rotating seat, and the upper end of the cylindrical rack is symmetrically provided with through slots for the pneumatic rods to extend out, and one end of the pneumatic rod extending out of the through slot is connected to a vacuum suction cup.

[0013] As a further optimization solution of the present invention, the coating head includes a U-shaped frame, an electric roller installed in the U-shaped frame, and a toothed sleeve sleeved on the outer periphery of the electric roller, and a brush head is provided at the front end of the U-shaped frame.

[0014] The present invention also provides a construction method for pre-coating a polyurethane pipe shell before construction of a cold insulation layer, comprising pre-coating the outer side of the polyurethane pipe shell with a rubber asphalt waterproofing compound using any of the above-mentioned devices, specifically comprising the following steps:

[0015] S1. Fix the polyurethane tube shell on the placement rack;

[0016] S2. Using the main drive assembly to drive the transmission rod to swing, driving the applicator head on the coaxially connected vertical frame to swing at a right angle to dip the rubber asphalt waterproofing adhesive in the adhesive storage tank. Simultaneously, the main drive assembly drives the polyurethane tube shell fixed on the placement frame to rotate, so that the rubber asphalt waterproofing adhesive is brushed onto the polyurethane tube shell to a coating thickness of at least 1.5 mm.

[0017] S3. Remove the painted polyurethane tube shell from the rack and lay it flat to dry.

[0018] As a further optimization scheme of the present invention, the construction of the cold insulation layer includes applying the polyurethane pipe shell pre-coated with rubber asphalt waterproof adhesive to the equipment and pipeline by a bundling method, then tightening and positioning it with bundling materials, and then wrapping the polyurethane waterproof membrane around the outside of the polyurethane pipe shell, and finally installing the protective layer.

[0019] As a further optimization solution of the present invention, the protective layer is an aluminum alloy thin plate.

[0020] The beneficial effects of the present invention are:

[0021] (1) The present invention utilizes a device to pre-coat the polyurethane pipe shell with rubber asphalt waterproofing material, which can be directly transported to the construction site for installation of the cold insulation layer after drying. The device has a high degree of automation, the coating thickness is uniform and controllable, and can be mass-produced.

[0022] (2) Compared with the traditional cold insulation layer construction method, the present invention is simple and easy to operate, saves manpower, eliminates safety hazards, reduces material waste and environmental pollution, and significantly improves construction efficiency. It can promote the smooth progress of construction work during the rush stage, shorten the construction period, and has a good application effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A top view provided for the present invention;

[0024] Figure 2 A diagram showing the structural state of the present invention during smearing;

[0025] Figure 3 A diagram showing the structure of the present invention when dipping in the rubber material;

[0026] Figure 4 A transmission schematic diagram of the main drive assembly provided by the present invention;

[0027] Figure 5 A schematic diagram of the structure of the placement rack provided by the present invention

[0028] Figure 6 A schematic diagram of the assembly of two polyurethane tube shells provided by the present invention;

[0029] In the figure: 1. frame; 2. coating transmission structure; 21. stand; 22. transmission rod; 23. linkage rod; 24. rocker arm; 25. rotating shaft; 26. positioning slider; 27. slide bar; 3. glue storage box; 4. coating head; 41. U-shaped frame; 42. electric roller; 43. toothed sleeve; 44. brush head; 5. placement rack; 51. cylinder rack; 52. rotating motor; 53. rotating seat; 54. pneumatic rod; 55. vacuum suction cup; 56. through slot; 6. chassis; 7. first drive shaft; 8. pulley assembly; 9. drive motor; 10. second drive shaft; 11. first semicircular gear; 12. second semicircular gear; 13. first driven gear; 14. second driven gear. DETAILED DESCRIPTION

[0030] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0031] Example 1

[0032] like Figure 1-3 As shown, a device for pre-coating polyurethane tube shells before the construction of a cold insulation layer includes a frame 1, a rubber storage box 3, and a placement rack 5 for fixing the polyurethane tube shells. It is characterized by: further including a coating transmission structure 2, the coating transmission structure 2 includes a transmission rod 22 and a stand 21 coaxially connected to the transmission rod 22, the top of the stand 21 is connected to a coating head 4, and one side of the coating head 4 is provided with a slide rod 27 that slidably cooperates with a positioning slider 26; and

[0033] A main drive assembly that drives the transmission rod 22 and the placement rack 5 to rotate;

[0034] The transmission rod 22 swings under the drive of the main drive assembly, driving the coating head 4 on the vertical frame 21 coaxially connected thereto to dip the adhesive in the adhesive storage box 3 in a right-angled swinging path, and at the same time cooperates with the main drive assembly to drive the polyurethane tube shell fixed on the placement rack 5 to rotate, so as to apply the rubber asphalt waterproof adhesive on the polyurethane tube shell.

[0035] Example 2

[0036] Based on Example 1, the main drive component includes a chassis 6, a drive motor 9, a pulley group 8, a first semicircular gear 11 and a second semicircular gear 12. The first semicircular gear 11 and the second semicircular gear 12 are both sleeved with a second drive shaft 10 in the middle part. The two second drive shafts 10 are axially connected to the pulley group 8, and the active end of the pulley group 8 is connected to the drive motor 9.

[0037] The main drive assembly also includes a first driven gear 13 meshing with the second semicircular gear 12 for transmission, and a second driven gear 14 meshing with the first semicircular gear 11 for transmission. The second driven gear 14 is axially connected to the placement rack 5. The first driven gear 13 is axially connected to the first drive shaft 7. The other end of the first drive shaft 7 is axially connected to a rocker rod 24. The outer end of the rocker rod 24 is hinged to a linkage rod 23, and the other end of the linkage rod 23 is hinged to the transmission rod 22. The outer portion of the positioning slider 26 is rotatably matched with the frame 1 by providing a rotating shaft 25.

[0038] It should be noted that, in the present invention, when the transmission teeth on the second semicircular gear 12 begin to mesh with the transmission teeth on the first driven gear 13 , the transmission teeth on the first semicircular gear 11 just disengage from the transmission teeth on the second driven gear 14 .

[0039] When in use, the polyurethane tube shell is installed and fixed from the bottom of the placement rack 5. The driving motor 9 first drives the pulley group 8 to rotate. The pulley group 8 drives the first semicircular gear 11 and the second semicircular gear 12 to rotate through the two second driving shafts 10.

[0040] like Figure 4 As shown, when the second semicircular gear 12 rotates clockwise, the transmission teeth on it mesh with the transmission teeth on the first driven gear 13, driving the first driven gear 13 to rotate counterclockwise, and the first driven gear 13 rotates to drive the first driving shaft 7 thereon to rotate counterclockwise. Since the other end of the first driving shaft 7 is connected to the rocking rod 24, the rocking rod 24 is made to rotate counterclockwise. Due to the setting of the linkage rod 23, when the rocking rod 24 rotates counterclockwise, it pulls the transmission rod 22 to swing synchronously counterclockwise. The transmission rod 22 is coaxially connected to the stand 21. When the transmission rod 22 swings counterclockwise, it drives the stand 21 back to a vertical state. The smearing head 4 that rotates and cooperates with the stand 21 is pulled up from the glue storage box 3 and transformed into a horizontal state under the restriction of the positioning slider 26. At this time, when the transmission teeth on the second semicircular gear 12 rotate to no longer contact the transmission teeth on the first driven gear 13, the smearing transmission structure 2 and the smearing head 4 do not transmit, and the smearing head 4 is maintained in the final horizontal state;

[0041] At the same time, when the transmission teeth on the first semicircular gear 11 are engaged with the transmission teeth on the second driven gear 14, the second driven gear 14 is driven to rotate counterclockwise. Since the second driven gear 14 is axially connected to the placement rack 5, the placement rack 5 rotates counterclockwise, and the polyurethane tube shell fixed thereon is folded to cooperate with the application head 4 to maintain it in the final horizontal state, so that the glue on the application head 4 is evenly applied to the surface of the tube shell.

[0042] As the driving motor 9 is continuously driven, similarly, when the transmission teeth on the second semicircular gear 12 are again meshed with the transmission teeth on the first driven gear 13, the first driven gear 13 is driven to rotate clockwise, causing the first driving shaft 7 on it to rotate clockwise. Conversely, the smearing head 4 will return to the glue storage box 3 along the original path to dip in the additional glue. At the same time, similarly, when the transmission teeth on the first semicircular gear 11 are again meshed with the transmission teeth on the second driven gear 14, the second driven gear 14 is driven to rotate clockwise. Since the second driven gear 14 is axially connected to the placement rack 5, the placement rack 5 is rotated clockwise, and the polyurethane tube shell fixed thereon is folded back to its original position. The device is continuously driven by the driving motor 9 and repeats the above movement process. When the thickness of the glue on the polyurethane tube shell is applied to meet the requirements, the polyurethane tube shell can be removed from the placement rack 5.

[0043] Example 3

[0044] On the basis of Example 2, the placing rack 5 includes a cylindrical rack 51, and a rotating motor 52 is provided in the middle position of the inner part of the cylindrical rack 51. The driving end of the rotating motor 52 is connected to a rotating seat 53 and two pneumatic rods 54 are connected to the rotating seat 53. The upper end of the cylindrical rack 51 is symmetrically provided with through slots 56 for the pneumatic rods 54 to extend out. One end of the pneumatic rod 54 extending out of the through slot 56 is connected to a vacuum suction cup 55. When in use, according to the size of the polyurethane tube shell, the rotating seat 53 is driven by the rotating motor 52 to rotate so that the angle between the two pneumatic rods 54 changes. When it is adjusted to a suitable angle to ensure that the vacuum suction cups 55 at the front ends of the two pneumatic rods 54 can support the polyurethane tube shell, the pneumatic rod 54 is controlled to start and the vacuum suction cups 55 are extended. The two vacuum suction cups 55 both generate an oblique outward supporting force. At the same time, the vacuum suction cups 55 adsorb the polyurethane tube shell, so that the semicircular polyurethane tube shell can be fixed on the cylindrical rack 51.

[0045] Furthermore, the coating head 4 includes a U-shaped frame 41, an electric roller 42 installed in the U-shaped frame 41, and a toothed sleeve 43 sleeved on the outer periphery of the electric roller 42. The front end of the U-shaped frame 41 is provided with a brush head 44. When the coating head 4 dips the glue, the electric roller 42 rotates to drive the toothed sleeve 43 thereon to rotate, driving the glue to fluctuate, making it easier for the brush head 44 to adhere to the glue.

[0046] Example 4

[0047] This embodiment also provides a construction method for pre-coating a polyurethane pipe shell before construction of a cold insulation layer, comprising pre-coating the outer side of the polyurethane pipe shell with a rubber asphalt waterproofing compound using any of the above-described devices, specifically comprising the following steps:

[0048] S1, fix the polyurethane shell on the placement rack 5;

[0049] S2. The main drive assembly drives the transmission rod 22 to swing, driving the applicator head 4 on the coaxially connected stand 21 to swing in a right-angled path to dip the rubber asphalt waterproofing adhesive in the adhesive storage tank 3. At the same time, the main drive assembly drives the polyurethane tube shell fixed on the placement rack 5 to rotate, so that the rubber asphalt waterproofing adhesive is brushed on the polyurethane tube shell to a coating thickness of at least 1.5 mm.

[0050] S3, remove the painted polyurethane shell from the placement rack 5, lay it flat and let it dry.

[0051] The cold insulation layer construction of the present invention includes applying the polyurethane shell pre-coated with rubber asphalt waterproofing material to the equipment and pipeline by bundling method. The structure of the installed polyurethane shell is as follows: Figure 6 As shown, two semicircular polyurethane pipe shells are interlocked to form a full circle, which can be used to wrap the pipeline. After that, they are tightened and positioned with tying materials. For the joints of the two polyurethane pipe shells, they are coated after installation to ensure sufficient coating. Then, polyurethane waterproof membrane is wrapped around the outside of the polyurethane pipe shell. Finally, the protective layer is installed. The protective layer is an aluminum alloy sheet. Compared with the flame-retardant mastic construction, the construction hygiene conditions of the polyurethane pipe shell + polyurethane waterproof membrane with pre-coated rubber asphalt waterproofing adhesive are greatly improved, the operation technique is simple, and the construction efficiency is significantly improved. It can promote the smooth progress of construction work and shorten the construction period during the rush stage.

[0052] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A device for pre-coating a polyurethane tube shell before construction of a cold insulation layer, comprising a frame (1), a rubber material storage box (3), and a placement rack (5) for fixing the polyurethane tube shell, characterized in that: The device further comprises a coating transmission structure (2), wherein the coating transmission structure (2) comprises a transmission rod (22) and a stand (21) coaxially connected to the transmission rod (22); a coating head (4) is connected to the top of the stand (21); a slide rod (27) is provided on one side of the coating head (4) and is slidably engaged with a positioning slide block (26); and the outer portion of the positioning slide block (26) is rotatably engaged with the frame (1) by providing a rotating shaft (25); and A main drive assembly for driving the transmission rod (22) and the placement rack (5) to rotate; the main drive assembly comprises a chassis (6), a drive motor (9), a pulley group (8), a first semicircular gear (11) and a second semicircular gear (12), wherein the middle of the first semicircular gear (11) and the second semicircular gear (12) are sleeved with a second drive shaft (10), the two second drive shafts (10) are axially connected to the pulley group (8), and the active end of the pulley group (8) is connected to the drive motor (9); The main drive assembly further includes a first driven gear (13) meshing with the second semicircular gear (12) for transmission, and a second driven gear (14) meshing with the first semicircular gear (11) for transmission, the second driven gear (14) being axially connected to the placement rack (5), the first driven gear (13) being axially connected to the first drive shaft (7), when the transmission teeth on the second semicircular gear (12) begin to mesh with the transmission teeth on the first driven gear (13), the transmission teeth on the first semicircular gear (11) just disengage from the transmission teeth on the second driven gear (14), the other end of the first drive shaft (7) being axially connected to a rocker (24), the outer end of the rocker (24) being hinged to a linkage rod (23), and the other end of the linkage rod (23) being hinged to the transmission rod (22); The transmission rod (22) swings under the drive of the main drive assembly, driving the coating head (4) on the coaxially connected stand (21) to dip the adhesive in the adhesive storage box (3) in a right-angled swinging path, and at the same time cooperates with the main drive assembly to drive the polyurethane tube shell fixed on the placement rack (5) to rotate, so as to apply the rubber asphalt waterproof adhesive on the polyurethane tube shell.

2. The device for pre-coating a polyurethane pipe shell before construction of a cold insulation layer according to claim 1, characterized in that: The placing rack (5) comprises a cylindrical rack (51), a rotating motor (52) is provided at the middle position inside the cylindrical rack (51), a driving end of the rotating motor (52) is connected to a rotating seat (53), and two pneumatic rods (54) are connected to the rotating seat (53), and a through slot (56) for the pneumatic rods (54) to extend is symmetrically provided at the upper end of the cylindrical rack (51), and one end of the pneumatic rod (54) extending from the through slot (56) is connected to a vacuum suction cup (55).

3. The device for pre-coating a polyurethane pipe shell before construction of a cold insulation layer according to claim 1, characterized in that: The smear head (4) comprises a U-shaped frame (41), a motorized roller (42) mounted in the U-shaped frame (41), and a toothed sleeve (43) sleeved on the outer periphery of the motorized roller (42). A brush head (44) is provided at the front end of the U-shaped frame (41).

4. A construction method for pre-coating a polyurethane pipe shell before construction of a cold insulation layer, characterized in that: The method comprises pre-coating the outer side of the polyurethane tube shell with a rubber asphalt waterproofing compound using the device according to any one of claims 1 to 3, specifically comprising the following steps: S1, fixing the polyurethane tube shell on the placement rack (5); S2, using the main drive assembly to drive the transmission rod (22) to swing, driving the coating head (4) on the coaxially connected stand (21) to dip the rubber asphalt waterproofing adhesive in the adhesive storage box (3) in a right-angled swing path, and at the same time cooperating with the main drive assembly to drive the polyurethane tube shell fixed on the placement rack (5) to rotate, so as to achieve the rubber asphalt waterproofing adhesive being brushed on the polyurethane tube shell, with the coating thickness being at least 1.5 mm; S3. Remove the painted polyurethane tube shell from the placement rack (5) and lay it flat to dry.

Images