Polyurethane prefabricated thermal insulation pipe
By introducing connecting rods, arc-shaped mounting grooves, and limiting pins into the pre-insulated polyurethane pipe, the problem of difficult welding connections was solved, enabling rapid and sealed connection of the insulated pipe, reducing labor intensity and improving efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2026-03-31
AI Technical Summary
The existing method of connecting pre-insulated polyurethane pipes is welding, which results in larger pipe weight, difficulty in connection and alignment, long time consumption, and high labor intensity.
The design incorporates a connecting rod, an arc-shaped mounting groove, and a limiting pin. The connecting rod is inserted into the arc-shaped mounting groove and rotated 90 degrees, while the limiting pin is inserted into the mounting hole, enabling a quick and secure connection of the insulation pipe.
This reduces the workload of staff, improves connection efficiency, and ensures the sealing and insulation effect of the insulated pipe connections.
Smart Images
Figure CN224065095U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to polyurethane prefabricated thermal insulation pipe technical field, specifically polyurethane prefabricated thermal insulation pipe. BACKGROUND
[0002] Polyurethane prefabricated thermal insulation pipe is formed by sequentially combining a working steel pipe for conveying medium, a polyurethane thermal insulation layer and a polyethylene plastic outer protective pipe through equipment, has good thermal insulation effect and is widely used in liquid and gas conveying pipe network, chemical pipeline, thermal insulation engineering, petroleum, central heating heat network, central air conditioning ventilation pipeline and municipal engineering.
[0003] The existing polyurethane prefabricated thermal insulation pipe is generally connected by welding, but the quality of the thermal insulation pipe is large, which makes the alignment and welding of the prefabricated thermal insulation pipe difficult, prolongs the connection time of the prefabricated direct-buried thermal insulation pipe and increases the labor intensity, and is not conducive to the use of workers. UTILITY MODEL CONTENT
[0004] In view of the deficiencies of the prior art, the utility model provides a polyurethane prefabricated thermal insulation pipe to solve the problem that the existing polyurethane prefabricated thermal insulation pipe is generally connected by welding, but the quality of the thermal insulation pipe is large, which makes the alignment and welding of the prefabricated thermal insulation pipe difficult, prolongs the connection time of the prefabricated direct-buried thermal insulation pipe and increases the labor intensity, and is not conducive to the use of workers.
[0005] To achieve the above object, the utility model provides the following technical scheme: a polyurethane prefabricated thermal insulation pipe, which comprises an outer protective shell, a polyurethane thermal insulation layer is fixedly connected in the inner part of the outer protective shell, a working steel pipe is fixedly connected in the inner part of the polyurethane thermal insulation layer, a connecting head is fixedly connected to the front side of the working steel pipe, a connecting seat one is fixedly connected to the surface front side of the outer protective shell, an arc-shaped mounting groove is formed in the surface of the connecting seat one, a fixing hole is formed in the rear side of the connecting seat one, a connecting seat two is fixedly connected to the surface rear side of the outer protective shell, a connecting rod is fixedly connected to the rear end of the connecting seat two, an installation hole is formed in the rear end middle part of the connecting rod, a limiting spring is fixedly connected in the inner part of the installation hole, and a limiting pin is fixedly connected to the rear side of the limiting spring.
[0006] Preferably, the number of arc-shaped mounting grooves is two, the two arc-shaped mounting grooves are arranged in an annular array on the surface of the connecting seat one, and the widths of the two arc-shaped mounting grooves are gradually increased from front to rear.
[0007] Preferably, the number of connecting rods is two, the two connecting rods are symmetrically arranged at the rear end of the connecting seat two, the two connecting rods are both of a structure with a small diameter in front and a large diameter in rear, and the widths of the two connecting rods are matched with the widths of the two arc-shaped mounting grooves.
[0008] Adopting the technical scheme, the connecting rod is clamped into the arc-shaped mounting slot and rotated by 90 degrees, the limiting pin inside the connecting rod is inserted into the mounting hole, thereby fixing and connecting the two heat preservation pipes together, without laborious welding by the staff, the labor intensity of the staff is reduced, the work efficiency is improved, and the staff is facilitated to use.
[0009] Preferably, the number of the fixing holes is two, the two fixing holes are symmetrically distributed on the upper and lower sides of the connecting seat one, and the two fixing holes are respectively communicated with the two arc-shaped mounting slots.
[0010] Preferably, the number of the limiting pins is two, and the diameters of the two limiting pins are matched with the diameters of the two fixing holes.
[0011] Preferably, the diameter of the connecting head is same as the inner wall diameter of the working steel pipe.
[0012] Adopting the technical scheme, the connecting head is perfectly inserted into another working steel pipe and closely adheres, the connecting head of the heat preservation pipe is perfectly adhered at the connecting position of the two heat preservation pipes, leakage is avoided, the connecting head is prevented from being exposed outside, the heat preservation effect of the heat preservation pipe is affected, and the heat preservation pipe is facilitated to use.
[0013] Compared with the prior art, the polyurethane prefabricated heat preservation pipe has the beneficial effects that:
[0014] 1. The polyurethane prefabricated heat preservation pipe is fixed and connected together by the connecting rod, the arc-shaped mounting slot and the like, the labor intensity of the staff is reduced, the work efficiency is improved, and the staff is facilitated to use.
[0015] 2. The polyurethane prefabricated heat preservation pipe is connected by the connecting head and the working steel pipe, the connecting head of the heat preservation pipe is perfectly inserted into another working steel pipe and closely adheres, the connecting head of the heat preservation pipe is perfectly adhered at the connecting position of the two heat preservation pipes, leakage is avoided, the connecting head is prevented from being exposed outside, the heat preservation effect of the heat preservation pipe is affected, and the heat preservation pipe is facilitated to use. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a front view structure schematic diagram of the utility model;
[0017] Figure 2 It is a rear view structure schematic diagram of the utility model;
[0018] Figure 3 It is a connecting state structure schematic diagram of the utility model;
[0019] Figure 4 It is the connection state cross section structure schematic diagram of the utility model;
[0020] Figure 5 It is the arc installation groove structure schematic diagram of the utility model;
[0021] Figure 6 It is the connection rod cross section structure schematic diagram of the utility model.
[0022] In the drawing: 1, outer protective shell, 2, polyurethane heat preservation layer, 3, working steel pipe, 4, connecting head, 5, connecting seat one, 6, arc installation groove, 7, fixed hole, 8, connecting seat two, 9, connecting rod, 10, installation hole, 11, limit spring, 12, limit pin. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
[0024] Embodiment 1:
[0025] Please refer to Figures 1-5 A kind of polyurethane prefabricated heat preservation pipe, including outer protective shell 1, polyurethane heat preservation layer 2 is fixedly connected in the inside of outer protective shell 1, working steel pipe 3 is fixedly connected in the inside of polyurethane heat preservation layer 2, connecting head 4 is fixedly connected to the front side of working steel pipe 3, connecting seat one 5 is fixedly connected to the surface front side of outer protective shell 1, arc installation groove 6 is set in the surface of connecting seat one 5, the number of arc installation groove 6 is two, two arc installation grooves 6 are annular array distribution in the surface of connecting seat one 5, and the width of two arc installation grooves 6 is narrow in front wide, fixed hole 7 is set in the rear side of connecting seat one 5, the number of fixed hole 7 is two, two fixed holes 7 are symmetrically distributed in the upper and lower sides of connecting seat one 5, and two fixed holes 7 are communicated with two arc installation grooves 6 respectively, connecting seat two 8 is fixedly connected to the surface rear side of outer protective shell 1, connecting rod 9 is fixedly connected to the rear end of connecting seat two 8, the number of connecting rod 9 is two, two connecting rods 9 are symmetrically distributed in the rear end of connecting seat two 8, and two connecting rods 9 are all front thin rear thick structure, and the width of two connecting rods 9 is adapted to two arc installation grooves 6, installation hole 10 is set in the rear end middle part of connecting rod 9, limit spring 11 is fixedly connected in the inside of installation hole 10, limit pin 12 is fixedly connected to the rear side of limit spring 11, the number of limit pin 12 is two, and the diameter of two limit pins 12 is adapted to the diameter of two fixed holes 7.
[0026] Working principle: when the worker needs to connect two polyurethane prefabricated insulation pipes together, the worker only needs to align the connecting seat two 8 on one insulation pipe with the connecting seat one 5 on the other insulation pipe and insert, at this time, the connecting rod 9 will be inserted into the arc-shaped mounting groove 6, and the limiting pin 12 will be pressed into the inside of the connecting rod 9, at this time, the worker rotates the connecting seat two 8 clockwise by 90 degrees, and the connecting rod 9 will slide along the arc-shaped mounting groove 6 to the other end of the arc-shaped groove, the other end of the arc-shaped groove is provided with a fixing hole 7, at this time, the limiting spring 11 in the connecting rod 9 will push the limiting pin 12 to insert into the fixing hole 7 to complete the locking, so as to fix and connect the two insulation pipes together, without the worker's laborious welding, the labor intensity of the worker is reduced, the work efficiency is improved, and the worker is convenient to use.
[0027] Compared with the related art, the polyurethane prefabricated insulation pipe has the beneficial effects that: through the cooperation of the connecting rod 9 and the arc-shaped mounting groove 6, the limiting pin 12 in the connecting rod 9 is inserted into the mounting hole 10 by being clamped into the arc-shaped mounting groove 6 and being rotated by 90 degrees, so as to fix and connect the two insulation pipes together, without the worker's laborious welding, the labor intensity of the worker is reduced, the work efficiency is improved, and the worker is convenient to use.
[0028] Embodiment 2:
[0029] Please refer to Figures 1-6 The inside of the outer protective shell 1 is fixedly connected with a polyurethane insulation layer 2, the inside of the polyurethane insulation layer 2 is fixedly connected with a working steel pipe 3, the front side of the working steel pipe 3 is fixedly connected with a connecting head 4, and the diameter of the connecting head 4 is the same as the inner wall diameter of the working steel pipe 3.
[0030] Working principle: when two polyurethane prefabricated insulation pipes are connected together, the connecting head 4 of one insulation pipe is inserted into the working steel pipe 3 of the other insulation pipe and tightly fits, which greatly improves the sealing between the two insulation pipes, avoids leakage, and makes the connection of the two insulation pipes perfectly fit, prevents the connecting head 4 from being exposed, affects the insulation effect of the insulation pipe, and is convenient to use.
[0031] Compared with the related art, the polyurethane prefabricated insulation pipe has the beneficial effects that: through the cooperation of the connecting head 4 and the working steel pipe 3, the connecting head 4 of the insulation pipe can be perfectly inserted into the other working steel pipe 3 and tightly fit, leakage is avoided, the connection of the two insulation pipes is perfectly fit, the connecting head 4 is prevented from being exposed, the insulation effect of the insulation pipe is affected, and use is facilitated.
[0032] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A polyurethane pre-insulated pipe comprising an outer protective sheath (1), characterised in that: The inside of the outer protective shell (1) is fixedly connected with a polyurethane heat preservation layer (2), the inside of the polyurethane heat preservation layer (2) is fixedly connected with a working steel pipe (3), the front side of the working steel pipe (3) is fixedly connected with a connecting head (4), the surface of the front side of the outer protective shell (1) is fixedly connected with a connecting seat one (5), the surface of the connecting seat one (5) is provided with an arc-shaped mounting groove (6), the rear side of the connecting seat one (5) is provided with a fixed hole (7), the surface of the rear side of the outer protective shell (1) is fixedly connected with a connecting seat two (8), the rear end of the connecting seat two (8) is fixedly connected with a connecting rod (9), the rear end of the connecting rod (9) is provided with a mounting hole (10) in the middle, the inside of the mounting hole (10) is fixedly connected with a limiting spring (11), the rear side of the limiting spring (11) is fixedly connected with a limiting pin (12).
2. The polyurethane pre-insulated pipe according to claim 1, characterized in that: The number of the arc-shaped mounting grooves (6) is two, the two arc-shaped mounting grooves (6) are arranged in an annular array on the surface of the connecting seat one (5), and the widths of the two arc-shaped mounting grooves (6) are gradually increased from front to back.
3. The polyurethane pre-insulated pipe according to claim 1, characterized in that: The number of the connecting rods (9) is two, the two connecting rods (9) are symmetrically arranged on the rear end of the connecting seat two (8), the two connecting rods (9) are both of a structure that the diameter gradually increases from front to back, and the widths of the two connecting rods (9) are adapted to the widths of the two arc-shaped mounting grooves (6).
4. The polyurethane pre-insulated pipe according to claim 1, characterized in that: The number of the fixed holes (7) is two, the two fixed holes (7) are symmetrically arranged on the upper and lower sides of the connecting seat one (5), and the two fixed holes (7) are respectively communicated with the two arc-shaped mounting grooves (6).
5. The polyurethane pre-insulated pipe according to claim 1, characterized in that: The number of the limiting pins (12) is two, and the diameters of the two limiting pins (12) are adapted to the diameters of the two fixed holes (7).
6. The polyurethane pre-insulated pipe according to claim 1, characterized in that: The diameter of the connecting head (4) is the same as the inner wall diameter of the working steel pipe (3).