Glass fiber reinforced spraying and winding composite thermal insulation pipe

Abstract

The utility model relates to the technical field of thermal insulation pipes, and provides a glass fiber reinforced spraying and winding composite thermal insulation pipe which comprises a sleeving assembly, the sleeving assembly comprises a connecting sleeve and a threaded ring distributed on the outer side of the connecting sleeve, a thermal insulation pipe assembly is assembled in the connecting sleeve, and the threaded ring is connected with the connecting sleeve. A screwing assembly is arranged at the position, located on the threaded ring, of the outer side of the connecting sleeve, the screwing assembly comprises a screwing sleeve arranged on the outer side of the threaded ring in a sleeving mode, an inward pushing assembly is further arranged on the inner side of the connecting sleeve, and the inward pushing assembly comprises a pressing rod and a connecting plate which are pushed inwards through extrusion matched with the screwing sleeve. According to the design, a thread propelling mechanism and a multi-sealing design are adopted, so that the two defects of inconvenience in manual operation and unstable sealing performance in file comparison are effectively overcome; according to the technical scheme, connection reliability is guaranteed, meanwhile, installation convenience and long-term use stability are remarkably improved, and the connecting structure is particularly suitable for application scenes of direct-buried prefabricated heat preservation pipes needing frequent disassembly and assembly or high sealing requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of thermal insulation pipe, specifically, relate to a kind of glass fiber reinforced type spraying winding composite thermal insulation pipe. BACKGROUND

[0002] The glass fiber reinforced type spraying winding composite thermal insulation pipe is a high-performance pipe that combines the advantages of glass fiber reinforced materials and spraying winding technology. The pipe uses glass fiber and its products as reinforcing materials, with a matrix material such as unsaturated polyester resin, formed by continuous winding process, and sprayed with thermal insulation materials such as polyurethane on the outer layer to form a tight thermal insulation layer. This structure not only significantly improves the compressive and tensile strength of the pipe, but also gives it excellent corrosion resistance, resisting the corrosion of chemicals such as acids, bases, and salts. At the same time, the spraying winding process makes the thermal insulation layer uniform and dense, effectively reducing heat loss and improving energy efficiency. In addition, the pipe is lightweight, easy to install, and suitable for various complex environments, such as direct burial and overhead laying. It has a long service life, low maintenance cost, and good environmental performance, meeting the requirements of modern green building and sustainable development. In the fields of industry, municipal administration, and power, the glass fiber reinforced type spraying winding composite thermal insulation pipe has a wide application prospect.

[0003] The utility model discloses a kind of glass fiber reinforced type spraying winding composite thermal insulation pipes, belong to thermal insulation pipe technical field.It includes thermal insulation pipe one, and the side wall of thermal insulation pipe one includes thermal insulation pipe two, and the circumferential outer wall of thermal insulation pipe one is provided with connecting sleeve, and connecting sleeve circumferential outer wall is symmetrically embedded with push rod.The utility model pulls push rod, then inserts thermal insulation pipe two into connecting sleeve inside, spring one pushes limit ring, drives push rod to move to connecting sleeve inside, spring two pushes push block, so that it limits limit block, can quickly install thermal insulation pipe two, simultaneously by left pushing connecting sleeve, in pulling push rod and extracting thermal insulation pipe two upwards, thermal insulation pipe two can be quickly disassembled;Arc-shaped rubber plate is stressed to bend, can buffer inner tube, simultaneously support rod moves in support seat one and support seat two inside, its two ends are buffered by buffer block one and buffer block two simultaneously, cooperate with arc-shaped rubber plate, so that it is better to buffer effect of inner tube.

[0004] The above-mentioned glass fiber reinforced type spraying winding composite thermal insulation pipe has the following problems:

[0005] I. Strong dependence on manual operation: The original patent uses a direct pull rod to realize connection, which requires more manpower and is not convenient to operate without mechanical assistance. In narrow space or high-density pipe arrangement, it is difficult to operate.

[0006] II. Unstable sealing performance: the original design only relies on the spring to push the limiting ring to realize sealing, and the spring is easy to fatigue after long-term use, resulting in a decrease in sealing performance. SUMMARY

[0007] The utility model provides a kind of glass fiber reinforced type spraying winding composite thermal insulation pipe, solve the problem of strong manual operation dependency and unstable sealing performance in prior art.

[0008] The technical scheme of the utility model is as follows: a kind of glass fiber reinforced type spraying winding composite thermal insulation pipe, including sleeve joint component, the sleeve joint component includes connecting sleeve, and the screw ring distributed at the outside of the connecting sleeve, the connecting sleeve is located at the side of screw ring and is annularly provided with through vertical slot, the connecting sleeve is internally equipped with thermal insulation pipe component, the connecting sleeve outside is located at screw ring and is provided with screwing component, the screwing component includes the sleeve of screwing sleeve outside, the connecting sleeve inside is also provided with inner push component, the inner push component includes the pressure rod and connecting plate that extrude inwards by the cooperation of screwing sleeve, the connecting plate is annularly fixedly connected at the through vertical slot of connecting sleeve periphery, the connecting plate inside is slidably connected with slide bar, the slide bar outside is fixedly connected with pressure rod, the slide bar is sleeved in spring ring inside, the upper end of spring ring is matched with pressure rod, and the lower end of spring ring is in contact with connecting plate.

[0009] Preferably, the inside of the screwing sleeve is provided with internal threads, the internal threads are matched with the screw ring, and the screwing sleeve is threadedly connected at the screw ring by the internal threads.

[0010] Preferably, the screwing component further includes an anti-slip layer and an inner collection groove, the anti-slip layer is distributed outside the screwing sleeve, and the inner collection groove is provided in the side surface of the screwing sleeve.

[0011] Preferably, the sleeve joint component further includes an inner ring plate, the inner ring plate is fixedly connected to the inner wall of the connecting sleeve, and the inner ring plate side surface is provided with a groove.

[0012] Preferably, the thermal insulation pipe component includes a thermal insulation pipe body, a sealing ring and a slope groove, the sealing ring is fixedly connected to the side surface of the thermal insulation pipe body, the sealing ring is matched with the groove, and the slope groove is provided outside the thermal insulation pipe body.

[0013] Preferably, the inner push component further includes a slope and a ball, the slope is provided at the top of the pressure rod, the slope is positionally corresponding to the inner collection groove, the ball is rotatably connected to the bottom of the pressure rod, and the ball is positionally corresponding to the slope groove.

[0014] Preferably, the inner push component further includes a sleeve ring, the sleeve ring is fixedly connected to the through slot of the connecting sleeve periphery, the sleeve ring is positionally corresponding to the pressure rod, and the sleeve ring is in contact with the pressure rod.

[0015] Preferably, the heat preservation tube body is composed of three layers of materials from inside to outside, which are an inner tube, a high-pressure sprayed polyurethane foam heat preservation layer and a glass fiber reinforced layer.

[0016] The utility model discloses the beneficial effects are:

[0017] I. by the screwing assembly and the inner push assembly cooperation, through the thread transmission realizes the labor-saving and accurate connection operation, specifically, the inner thread of the inside of the sleeve and the thread ring of the outside of the connecting sleeve are precisely matched, and the axial advancing force is generated when rotating the sleeve. This design converts the rotary motion into linear motion, not only greatly reduces the manpower required for operation, but also accurately controls the advancing distance, ensuring uniform pressure distribution.

[0018] II. A perfect two-stage sealing guarantee system is established, completely solving the problem of unstable sealing performance in traditional technology; the first stage sealing is realized by the precise matching of the sealing ring on the side of the heat preservation tube body and the groove on the inner ring plate, and this structure design ensures the reliability of the preliminary sealing; the second stage sealing is realized by the inner push assembly, and the uniformly distributed pressure rods on the bottom exert uniform pressure on the slope groove on the outside of the heat preservation tube body; this design not only avoids local stress concentration, but also maintains stable sealing performance in long-term use. Especially worth mentioning is that the rotating connection design of the ball greatly reduces the friction loss and prolongs the service life of the sealing system. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0020] Figure 1 It is the whole device split schematic drawing of the utility model;

[0021] Figure 2 It is the screwing assembly schematic drawing of the utility model;

[0022] Figure 3 It is the heat preservation tube assembly schematic drawing of the utility model;

[0023] Figure 4 It is the connecting sleeve sectional view of the utility model;

[0024] Figure 5 It is the sleeve joint assembly and the screwing assembly split schematic drawing of the utility model;

[0025] Figure 6 It is Figure 5 The A area enlarged view of the utility model;

[0026] Figure 7 It is the heat preservation tube body material composition diagram of the utility model;

[0027] In the figure: 1, the sleeve assembly; 11, the connecting sleeve; 111, the threaded ring; 12, the inner ring plate; 121, the groove; 2, the twisting assembly; 21, the twisting sleeve; 211, the anti-skid layer; 212, the inner receiving groove; 22, the internal thread; 3, the inner pushing assembly; 31, the connecting plate; 32, the sliding rod; 321, the spring ring; 33, the pressing rod; 331, the inclined surface; 332, the ball; 34, the sleeve ring; 4, the heat preservation pipe assembly; 41, the heat preservation pipe body; 4101, the glass fiber reinforced layer; 4102, the high-pressure sprayed polyurethane foam heat preservation layer; 4103, the inner tube; 411, the slope groove; 42, the sealing ring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are involved in the protection scope of the utility model.

[0029] Embodiment, please see Figures 1-7 A glass fiber reinforced sprayed winding composite heat preservation pipe, comprising a sleeve assembly 1, the sleeve assembly 1 comprises a connecting sleeve 11 and a threaded ring 111 distributed on the outer side of the connecting sleeve 11, the connecting sleeve 11 is located on one side of the threaded ring 111 and is annularly provided with a through vertical groove, the connecting sleeve 11 is internally assembled with a heat preservation pipe assembly 4, the outer side of the connecting sleeve 11 is provided with a twisting assembly 2 at the threaded ring 111, the twisting assembly 2 comprises a twisting sleeve 21 sleeved on the outer side of the threaded ring 111, the connecting sleeve 11 is further internally provided with an inner pushing assembly 3, the inner pushing assembly 3 comprises a pressing rod 33 and a connecting plate 31 which are pushed inwards by extrusion matched with the twisting sleeve 21, the connecting plate 31 is annularly fixedly connected at the through vertical groove of the connecting sleeve 11, the connecting plate 31 is slidably connected with a sliding rod 32 on the inner side, the sliding rod 32 is fixedly connected with the pressing rod 33 on the outer side, the sliding rod 32 is sleeved on the inner side of a spring ring 321, the upper end of the spring ring 321 is matched with the pressing rod 33, and the lower end of the spring ring 321 is in contact with the connecting plate 31.

[0030] By adopting the threaded pushing mechanism and the multiple sealing design, the two defects of inconvenient manual operation and unstable sealing performance in the comparative document are effectively solved; the technical scheme significantly improves the installation convenience and long-term use stability while ensuring the connection reliability, and is particularly suitable for the application scene of the direct-buried prefabricated heat preservation pipe which needs to be frequently disassembled and assembled or has high sealing requirements.

[0031] The inner side of the twisting sleeve 21 is provided with an internal thread 22 matched with the threaded ring 111, and the twisting sleeve 21 is threadedly connected at the threaded ring 111 through the internal thread 22.

[0032] Through the design, the screw sleeve 21 can be screwed and pushed when the connecting sleeve 11 is located at the threaded ring 111.

[0033] The screwing assembly 2 further comprises an anti-skid layer 211 and an inner receiving groove 212, the anti-skid layer 211 is distributed on the outer side of the screw sleeve 21, and the inner receiving groove 212 is arranged on the side of the screw sleeve 21.

[0034] The anti-skid layer 211 arranged on the outer side of the screw sleeve 21 can increase the friction force of the staff when holding the screw sleeve 21.

[0035] The sleeve connecting assembly 1 further comprises an inner ring plate 12, the inner ring plate 12 is fixedly connected to the inner wall of the connecting sleeve 11, and the inner ring plate 12 is provided with a groove 121 on the side.

[0036] The heat preservation pipe assembly 4 comprises a heat preservation pipe body 41, a sealing ring 42 and a slope groove 411, the sealing ring 42 is fixedly connected to the side of the heat preservation pipe body 41, the sealing ring 42 is matched with the groove 121, and the slope groove 411 is arranged on the outer side of the heat preservation pipe body 41.

[0037] The inner pushing assembly 3 further comprises an inclined surface 331 and a ball 332, the inclined surface 331 is arranged on the top of the pressing rod 33, the inclined surface 331 is positionally corresponding to the inner receiving groove 212, and the ball 332 is rotatably connected to the bottom of the pressing rod 33 and positionally corresponding to the slope groove 411.

[0038] The inner pushing assembly 3 further comprises a sleeve ring 34, the sleeve ring 34 is fixedly connected to the through groove of the connecting sleeve 11, the sleeve ring 34 is positionally corresponding to the pressing rod 33, and the sleeve ring 34 is in contact with the pressing rod 33.

[0039] The sleeve ring 34 arranged on the outer side of the pressing rod 33 can avoid foreign matters from entering;

[0040] The heat preservation pipe body 41 comprises, from inside to outside, an inner tube 4103, a high-pressure sprayed polyurethane foam heat preservation layer 4102 and a glass fiber reinforced layer 4101.

[0041] The heat preservation pipe body 41 comprises, from inside to outside, an inner tube 4103, a high-pressure sprayed polyurethane foam heat preservation layer 4102 and a glass fiber reinforced layer 4101.

[0042] The inner tube 4103 is usually made of seamless steel pipe or welded steel pipe and is used for conveying medium (hot water, cold water, crude oil, chemical medium, etc.); has good pressure bearing capacity, temperature resistance (adapt to the temperature of the conveyed medium) and compatibility with the heat preservation layer.

[0043] The high-pressure sprayed polyurethane foam heat preservation layer 4102 (core functional layer) adopts a “spraying and winding” technology.

[0044] Sprayed on the outer surface of the working pipe, high-pressure spraying of polyurethane (PU) foam raw materials forms a continuous and dense, high-closed-cell polyurethane rigid foam insulation layer. Key advantages: excellent thermal insulation performance: extremely low thermal conductivity (usually 0.02-0.03 W / (m·K)), effectively reducing heat loss.

[0045] Seamless continuity: the spraying process makes the insulation layer uniformly wrap the working pipe, with no joints, minimizing thermal bridges.

[0046] High closed-cell rate: prevents moisture penetration, maintaining a low thermal conductivity over a long period of time.

[0047] Good adhesion: strong adhesion to steel pipes and outer protective layers.

[0048] Winding: when the polyurethane insulation layer is initially cured but not fully set, it is continuously wound with glass fiber impregnated with resin. This usually refers to the initial formation of the outer protective layer (jacket layer) or the reinforcement layer.

[0049] Outer protective layer glass fiber reinforced layer 4101 (reinforced corrosion protection layer / jacket layer):

[0050] Material and structure: glass fiber reinforced composite material layer.

[0051] Composition: continuously wound glass fiber (possibly untwisted roving, chopped mat, continuous mat, or a combination thereof).

[0052] Resin matrix: the glass fiber is impregnated with high-performance resin (such as unsaturated polyester resin, vinyl resin, etc.), which forms a solid composite protective layer after curing.

[0053] The meaning of "reinforced": the mechanical properties and corrosion resistance of the outer protective layer are highlighted. The addition of glass fiber significantly improves the layer's: high strength and stiffness: provides excellent impact resistance, compression resistance, soil load resistance, and resistance to external damage (such as backfill impact, construction damage).

[0054] Corrosion resistance: completely isolates the external environment (water, oxygen, soil, chemicals, microorganisms) from eroding the insulation layer and steel pipe.

[0055] Weather resistance: strong ability to resist natural aging such as ultraviolet rays, wind and rain, and sunlight.

[0056] Low permeability: extremely low moisture permeability, long-term protection of the insulation layer from water vapor intrusion.

[0057] Good toughness: better stress cracking resistance than ordinary plastics (such as HDPE).

[0058] Core advantages of the "spray-winding composite" process:

[0059] Excellent performance of the insulation layer: sprayed polyurethane ensures high closed-cell rate, low thermal conductivity and continuous seamless.

[0060] Strong structural integrity: the working pipe, insulation layer and outer protective layer are tightly combined through physical and chemical action, forming a whole pipeline system, avoiding the problem of interlayer separation.

[0061] High production efficiency: high degree of automation, continuous and large-scale production can be realized.

[0062] Environmentally friendly and energy saving: the insulation effect is remarkable, which significantly reduces the operating energy consumption.

[0063] Main advantages:

[0064] Excellent heat insulation and energy saving effect: the core advantage is that it significantly reduces the heat (cold) loss of long-distance transportation.

[0065] Long service life: the glass fiber reinforced outer protective layer provides excellent physical protection and environmental isolation, and the overall corrosion resistance can reach more than 30 years or even longer.

[0066] Excellent mechanical properties: strong compression resistance and impact resistance, which can adapt to the complex soil stress and construction environment of direct burial laying.

[0067] Double insurance against corrosion: external corrosion protection of the working pipe + complete environmental corrosion isolation of the outer protective layer.

[0068] Convenient construction: factory prefabrication, on-site installation (mainly joint processing) is relatively simple and efficient, which shortens the construction period.

[0069] Low operation and maintenance cost: long service life, low failure rate, good insulation effect, and low comprehensive maintenance cost.

[0070] The working principle and use process of the utility model are as follows:

[0071] When the assembly work of the insulation pipe body 41 in the connecting sleeve 11 needs to be completed, the insulation pipe body 41 can be first inserted into the connecting sleeve 11 towards the side of the sealing ring 42, and when the sealing ring 42 is on the groove 121, the positioning work of the insulation pipe body 41 in the connecting sleeve 11 is completed.

[0072] Subsequently, the sleeve 21 is held and rotated, at this time, the sleeve 21 is pushed outside along the thread ring 111 of the connecting sleeve 11, and the inner groove 212 of the side of the sleeve 21 gradually pushes and extrudes the slope 331 of the top of the pressing rod 33, at this time, the ring-distributed pressing rod 33 is pushed inside the connecting sleeve 11 under the influence of the pushing force of the sleeve 21, in particular, during the pushing process, the ball 332 of the bottom of the pressing rod 33 contacts and extrudes the slope groove 411, at this time, the heat preservation pipe body 41 is fixed inside the connecting sleeve 11 by the ring-distributed pressing rod 33, in particular, the heat preservation pipe body 41 is displaced a small amount again to the direction of the inner ring plate 12 under the pushing influence of the pressing rod 33, at this time, the sealing ring 42 completely contacts and extrudes inside the groove 121, the above steps not only can complete the fast assembly of the heat preservation pipe body 41 in the connecting sleeve 11, but also can ensure the sealing property of the connecting part of the two.

[0073] When the heat preservation pipe body 41 is taken out from the inside of the connecting sleeve 11, the sleeve 21 is only reversed, at this time, the slope 331 of the top of the pressing rod 33 is separated from the inner groove 212, and under the elastic action of the spring ring 321, the pressing rod 33 is only reset and separated from the slope groove 411, at this time, the heat preservation pipe body 41 can be quickly taken out from the connecting sleeve 11.

[0074] The above only is the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. made in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A glass fiber reinforced spray and wound composite insulating pipe comprising a socket assembly (1), characterized in that, Said sleeve assembly (1) includes a connecting sleeve (11) and a threaded ring (111) distributed outside the connecting sleeve (11), the connecting sleeve (11) is annularly provided with a vertical slot on one side of the threaded ring (111), a heat preservation pipe assembly (4) is assembled inside the connecting sleeve (11), a twisting assembly (2) is arranged outside the connecting sleeve (11) at the threaded ring (111), the twisting assembly (2) includes a twisting sleeve (21) sleeved outside the threaded ring (111), an inner pushing assembly (3) is further arranged inside the connecting sleeve (11), the inner pushing assembly (3) includes a pressing rod (33) and a connecting plate (31) which are pushed inward by extrusion matched with the twisting sleeve (21), the connecting plate (31) is fixedly connected at the vertical slot around the connecting sleeve (11), a sliding rod (32) is slidingly connected inside the connecting plate (31), the sliding rod (32) is fixedly connected with the pressing rod (33) outside, the sliding rod (32) is sleeved inside a spring ring (321), the spring ring (321) is matched with the pressing rod (33) at the upper end, and the spring ring (321) is in contact with the connecting plate (31) at the lower end.

2. A glass fiber reinforced spray and wound composite pipe according to claim 1, characterized in that, Said twisting sleeve (21) is internally provided with an internal thread (22) matched with the threaded ring (111), and the twisting sleeve (21) is threadedly connected at the threaded ring (111) through the internal thread (22).

3. The glass fiber reinforced spray and wound composite pipe according to claim 1, characterized in that, Said twisting assembly (2) further includes an anti-skid layer (211) and an inner collecting groove (212), the anti-skid layer (211) is distributed outside the twisting sleeve (21), and the inner collecting groove (212) is formed in the side of the twisting sleeve (21).

4. The glass fiber reinforced spray and wound composite pipe according to claim 2, characterized in that, Said sleeve assembly (1) further includes an inner ring plate (12) fixedly connected to the inner wall of the connecting sleeve (11), and a groove (121) is formed in the side of the inner ring plate (12).

5. The glass fiber reinforced spray and wound composite pipe according to claim 4, characterized in that, Said heat preservation pipe assembly (4) includes a heat preservation pipe body (41), a sealing ring (42) and a slope groove (411), the sealing ring (42) is fixedly connected to the side of the heat preservation pipe body (41), the sealing ring (42) is matched with the groove (121), and the slope groove (411) is formed outside the heat preservation pipe body (41).

6. A glass fiber reinforced spray and wound composite pipe according to claim 5, characterized in that, Said inner pushing assembly (3) further includes an inclined surface (331) and a ball (332), the inclined surface (331) is formed at the top of the pressing rod (33), the inclined surface (331) is positionally corresponding to the inner collecting groove (212), and the ball (332) is rotatably connected to the bottom of the pressing rod (33) and positionally corresponding to the slope groove (411).

7. The glass fiber reinforced spray and wound composite pipe according to claim 6, characterized in that, Said inner pushing assembly (3) further includes a sleeve ring (34) fixedly connected to the vertical slot around the connecting sleeve (11), the sleeve ring (34) is positionally corresponding to the pressing rod (33) and in contact with the pressing rod (33).

8. The glass fiber reinforced spray and wound composite pipe according to claim 5, characterized in that, Said heat preservation pipe body (41) is composed of an inner tube (4103), a high-pressure sprayed polyurethane foam heat preservation layer (4102) and a glass fiber reinforced layer (4101) from inside to outside.

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