CN117948465A - Composite structure wall spiral reinforced rigid winding pipe for underground and processing method thereof - Google Patents

Abstract

The invention provides a spiral reinforced rigid winding pipe of a composite structure wall for burying, which comprises an inner liner layer, a reinforcing layer and a fiber strip column layer from inside to outside, wherein each layer is adhered and integrated, the fiber strip column layer is formed by spirally and radially winding a first fiber strip column on the outer side of the reinforcing layer and fastening, the spiral pitch of the first fiber strip column is 50 mm-100 mm, the included angle between the first fiber strip column and the axis of the reinforcing layer is 55-57 degrees, and the ratio between the first fiber strip column and the diameter of the inner liner layer 1 is 1:70-1:40; the composite structural pipe provided by the invention has the advantages that the fiber column layer is arranged, so that the manufacturing cost is reduced under the condition of better pressure resistance, and better economic benefit is realized.

Description

Composite structure wall spiral reinforced rigid winding pipe for underground and processing method thereof

Technical Field

The invention belongs to the field of water supply and drainage pipelines, and particularly relates to a composite structure wall spiral reinforced rigid winding pipe for underground use and a processing method thereof.

Background

The existing construction engineering of water supply and drainage and long-distance water delivery pipelines mainly adopts two types of glass fiber reinforced plastic (process) pipelines and glass fiber reinforced plastic sand inclusion pipelines, and the glass fiber reinforced plastic (process) pipelines have the advantages of high ring rigidity and long service life, but are made of glass fibers and resin, are not doped with fillers made of other materials, and have higher product unit price. The glass fiber reinforced plastic sand inclusion pipeline reduces the material usage amount of glass fiber and resin by adding the sand inclusion layer, so as to reduce the manufacturing cost of the pipeline, but when the internal water pressure is obviously increased or is impacted by external force, the sand inclusion layer is easy to break, thereby causing water leakage or overall structure breakdown. Therefore, how to integrate the high ring rigidity, long service life and low cost of the glass fiber reinforced plastic sand inclusion pipeline has become an urgent need for the water supply and drainage pipeline market.

The invention patent with the Chinese patent publication number of CN103791174A discloses a composite winding thermoplastic glass fiber reinforced plastic pipe and a preparation method thereof, wherein the pipe consists of an inner layer, an intermediate layer and an outer layer, the inner layer is a circumferential winding continuous glass fiber reinforced thermoplastic prepreg tape layer, the intermediate layer is a spiral winding continuous glass fiber reinforced thermoplastic prepreg tape layer, and the outer layer is a circumferential winding continuous glass fiber reinforced thermoplastic resin prepreg tape layer. Compared with the performance of the existing glass fiber reinforced plastic pipe, the pipe has the advantages that the technical performances of the circumferential tensile strength and the axial tensile strength of the pipe are improved through the multilayer winding design, and the manufacturing cost is reduced. The market competitiveness of the glass fiber reinforced plastic pipe is improved to a certain extent; but the inner layer, the middle layer and the outer layer of the pipe main body structure are different in three-layer winding mode so as to increase the ring stiffness through winding stacking, but the three layers are respectively arranged independently and are not reinforced, so that the radial compression ring stiffness and the radial tension ring stiffness of the pipe are not ideal, and the outer layer is wound through full-coverage stacking of the winding layers, so that the material cost is required to be reduced. Aiming at the technical problems still existing in the multilayer winding glass reinforced plastic pipe and the requirement of product manufacturing cost reduction, the development of a novel winding pipe is needed.

Disclosure of Invention

The invention aims to provide a composite structure wall spiral reinforced rigid winding pipe for underground use and a processing method thereof, and the structural design of the pipe is optimized, so that the radial compression resistance and tensile ring rigidity of the pipe are greatly improved on the basis of the excellent performance of the existing winding pipe, and the manufacturing cost of the product is reduced.

The aim of the invention is achieved by the following technical scheme:

The utility model provides a bury and use composite construction wall spiral reinforcing rigidity winding tubular product, its is composite construction, contains from interior to exterior cementation inner liner, enhancement layer and the fiber strip post layer as an organic whole, the fiber strip post layer is by radial winding of first fiber strip post spiral in the enhancement layer outside and fastening, wherein first fiber strip post spiral pitch is 50 mm-100 mm, and first fiber strip post diameter is 1:70-1:40 with the inner liner diameter, and first fiber strip post is 55-57 with the contained angle of enhancement layer axis. The first fiber strip column comprises an inner core and a glass fiber binding band wound outside the inner core, wherein the inner core is formed by mixing and solidifying glass fibers or basalt fibers and resin, and the resin is epoxy resin or o-benzene type unsaturated resin.

The technical scheme also provides a processing method of the buried composite structure wall spiral reinforced rigid winding pipe, which comprises the following steps:

S1, mixing epoxy resin or o-benzene type unsaturated resin with short fibers, and cooling for standby after high-temperature curing molding to prepare a composite pipeline lining layer;

S2, utilizing glass fiber or basalt fiber adhered with resin to reciprocally wind and form a reinforcing layer on the surface of the inner liner of the composite pipeline;

s3, gathering glass fibers or basalt fibers after mixing resin, and winding and fixing the glass fibers or basalt fibers by using a glass fiber binding belt to prepare a fiber strip column;

s4, winding the uncured fiber strip column along a direction and fixing the uncured fiber strip column outside the reinforcing layer for standby;

s5, curing and forming the pipe fitting manufactured in the step S4 at high temperature.

Compared with the prior art, the tubular product has the beneficial effects that the tubular product is provided with the optimal spiral radial winding pitch by optimizing the fiber strip column layer materials and arranging the fiber strip column layer and the inner liner layer according to the proportion, so that the balance of the tubular product annular rigidity and the product production cost is achieved, the annular tensile strength, the axial tensile strength, the radial compression resistance and the tensile annular rigidity of the tubular product are comprehensively improved, and the product manufacturing cost is reduced.

Based on the technical scheme, the invention can also be improved as follows:

Further, the above-mentioned composite structure wall spiral reinforcement rigidity winding tubular product for burial is opened two sets of axial through the slotted holes of enhancement layer at least on the enhancement layer, the axial has worn to put second fibre strip post in the slotted hole, the second fibre strip post wears to place in the slotted hole before first fibre strip post winds the enhancement layer, first fibre strip post spiral radial winding forms spacing to second fibre strip post on the enhancement layer in step, the free end of second fibre strip post is with every pitch reverse winding of first fibre strip post, until the both ends of second fibre strip post are connected.

Further, the buried composite structure wall spiral reinforced rigid winding pipe is provided with the reinforcing ribs at the axial winding positions of the first fiber strip column and the second fiber strip column.

Further, the buried composite structure wall spiral reinforced rigid winding pipe is provided with the limiting ring in the slotted hole, the inner wall of the limiting ring is coated with the adhesive layer, and the outer wall of the limiting ring is provided with the protruding block and the locking slot; the inner wall of the limiting ring is adhered in the slotted hole, the second fiber strip column penetrates through the limiting ring, and the limiting ring coats the second fiber strip column and is locked through the protruding block and the clamping groove.

Furthermore, the spiral reinforced rigid winding pipe with the buried composite structure wall is further provided with ratchet mechanisms at two ends of the slotted holes, and the free ends of the second fiber bars are connected to balance wheels of the ratchet mechanisms.

Further, the processing method of the buried composite structure wall spiral reinforced rigid winding pipe comprises the following steps of S1, selecting one of epoxy resin or o-benzene type unsaturated resin as a base material, and mixing the base material with short fibers in proportion; pouring the mixture into a pre-prepared mold under the heating condition, maintaining the temperature at 150-200 ℃, completing high-temperature curing, and gradually cooling to room temperature to avoid the generation of internal stress, thereby forming a uniform and defect-free inner liner; step S2, adopting glass fiber or basalt fiber, pre-dip-coating resin which is the same as or compatible with the lining layer by the glass fiber or basalt fiber, carrying out reciprocating winding on the surface of the lining layer by using an automatic winding machine, and reinforcing the mechanical strength and the compression resistance of the pipeline by repeatedly winding the reinforcing layer; and S3, placing the wound pipe in a high-temperature curing furnace, controlling the temperature to be 150-200 ℃, adjusting the curing time according to the characteristics of a resin system, and performing the pipe under controlled temperature and pressure in the curing process to ensure complete curing and good adhesion of fibers and resin, and performing cooling treatment after curing molding to ensure the dimensional stability of the pipe and reduce internal stress.

The technical scheme also provides a processing method of the buried composite structure wall spiral reinforced rigid winding pipe, which comprises the following steps:

S1, mixing epoxy resin or o-benzene type unsaturated resin with short fibers, and cooling for standby after high-temperature curing molding to prepare a composite pipeline lining layer;

S2, utilizing glass fiber or basalt fiber adhered with resin to reciprocally wind and form a reinforcing layer on the surface of the inner liner of the composite pipeline, forming an axially through slot on the reinforcing layer, adhering limiting rings at two ends of the slot, and arranging a ratchet mechanism;

s3, gathering glass fibers or basalt fibers after mixing resin, and winding and fixing the glass fibers or basalt fibers by using a glass fiber binding belt to prepare a fiber strip column;

S4, penetrating a second fiber column into each slot hole, taking out the first fiber column, winding the fiber column on the reinforcing layer through a spiral winding machine, then winding the free end of the second fiber column with each spiral pitch of the first fiber column again, connecting the free end of the second fiber column to a balance wheel of a ratchet mechanism, rotating the ratchet mechanism to tighten the second fiber column, and then wrapping the second fiber column with a lug and a clamping groove of a limiting ring;

s5, curing and forming the pipe fitting manufactured in the step S4 at high temperature.

Compared with the prior art, the invention has the beneficial effects that the limit reinforcing arrangement of the second fiber strip column to the first fiber strip column further fastens the spiral structure of the fiber strip column layer, and increases the compression resistance and the stability of the composite structure wall spiral reinforced rigid winding pipe.

Drawings

FIG. 1 is an isometric view of example 1 of the present invention;

FIG. 2 is an assembly view of an inner liner and a reinforcing layer according to embodiments 2-4 of the present invention;

FIG. 3 is an axial side view of the present invention from example 2 to example 4;

fig. 4 is a front view of embodiment 2 to embodiment 4 of the present invention;

fig. 5 is a left side view of embodiment 2 to embodiment 4 of the present invention;

FIG. 6 is a cross-sectional view of FIG. 5 A-A;

fig. 7 is a perspective view of a retainer ring according to embodiment 4 of the present invention.

Reference numerals in the drawings of the specification include: the inner liner 1, the reinforcing layer 2, the fiber strip column layer 3, the first fiber strip column 31, the second fiber strip column 32, the slotted hole 4, the limiting ring 5, the protruding block 6, the clamping groove 7, the reinforcing rib 8 and the ratchet mechanism 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1, the spiral reinforced rigid winding pipe with the buried composite structure wall is of a composite structure, and comprises an inner liner layer 1, a reinforcing layer 2 and a fiber rod column layer 3 from inside to outside, wherein the layers are adhered into a whole. The inner liner layer 1 is formed by mixing resin and short fibers and then curing at a high temperature, the reinforcing layer 2 is formed by uniformly winding one or more layers of long fibers impregnated with the resin on the surface of the inner liner layer 1 in a circumferential direction, and the uniformity, the sealing property and the mechanical strength of the reinforcing layer 2 can be ensured by uniformly winding the long fibers impregnated with the resin, so that necessary structural strength and pressure resistance are provided for the pipe. The fiber strip column layer 3 is formed by spirally and radially winding a first fiber strip column 31 on the outer side of the reinforcing layer 2 and fastening, the first fiber strip column 31 comprises an inner core and a glass fiber binding band wound on the outer side of the inner core, the inner core is formed by mixing and curing glass fibers or basalt fibers and resin, and the resin is epoxy resin or o-phenyl unsaturated resin. Wherein the spiral pitch of the first fiber strip column 31 is 50 mm-100 mm, the included angle between the first fiber strip column 31 and the axis of the reinforcing layer 2 is 55 degrees to 57 degrees, and the ratio of the diameter of the first fiber strip column 31 to the diameter of the inner liner layer 1 is 1:70-1:40.

The research and development department of my department performs multiple groups of pressure tests and comparison tests on the final product of the spiral reinforced rigid winding pipe with the buried composite structure wall so as to detect the product performance of a new product.

Test purpose 1:1. verifying ring stiffness of the buried composite structure wall spiral reinforced rigid winding pipe with different winding pitches under preset conditions; the test sample is 10 pipe products with intercepting pipe length of 300mm, pipe inner diameter DN1005, inner lining layer thickness of 3mm, reinforcing layer thickness of 15mm, fiber column layer of 20mm and winding pitch of 20-120 mm.

Test purpose 2: and verifying the ring rigidity of the buried composite structure wall spiral reinforced rigid winding pipe under different proportions of the fiber strip column and the lining layer. The test sample material is intercepted pipeline length 300mm, pipeline internal diameter DN1005, wherein lining layer thickness 3mm, reinforcing layer thickness 15mm, fiber strip column layer winding pitch 80mm, fiber strip column layer diameter and lining layer diameter ratio 1:100-1:20. test equipment and conditions: the ring stiffness tester can provide accurate pressure and measure deformation. The temperature was controlled to 25℃and during the test phase the sample was placed horizontally on the tester.

The test method comprises the following steps: the test sample is arranged on the supporting device of the ring stiffness tester, so that the vertical axis of the test sample is ensured to be vertical, and the compression plate of the tester is uniformly contacted with the upper surface of the test sample, thereby avoiding inclination or deflection. Pressure was gradually applied to the test specimen according to ASTM D2412 until a force value of 6.35kN was reached. During the application of force, the radial deformation of the sample was continuously recorded. When the pressure reached 6.35kN, the total deformation at this time was recorded. The pressure was released and the test piece was observed for permanent deformation.

Experiment group 1:

spiral pitch (mm)	Applying load (kN)	Ring stiffness (N/m 2)	Bakelite hardness	Tensile Strength (kN/m)	Deformation ratio (%)
						20	6.35	13298.32	55.21	7601	6.96
30	6.35	13286.57	54.59	7599	6.96
						40	6.35	13283.64	54.27	7596	6.97
50	6.35	13279.97	54.13	7590	6.97
						60	6.35	13275.31	54.09	7585	7.03
70	6.35	13272.92	53.97	7584	7.04
						80	6.35	13271.75	53.82	7581	7.04
90	6.35	13269.37	53.74	7572	7.06
						100	6.35	13264.63	53.43	7570	7.10
110	6.35	13215.29	52.76	7326	7.21
						120	6.35	13167.35	52.03	7191	7.42

As can be seen from the data of experiment 1, when pressure is applied to a test sample to 6.35kN, when the fiber column layer is radially and spirally wound on the reinforcing layer at a pitch of 20-100 mm, the ring stiffness change amplitude of the test sample is within 65N/m ², when the pitch of the fiber column layer radially wound on the reinforcing layer is above 100mm, the ring stiffness of the test sample of the pipe is greatly reduced by the pressure test, therefore, the radial winding pitch of the fiber column layer of 20-100 mm is preferred, and the ring stiffness of the wound fiber column material is doubled as the spiral pitch of the fiber column layer is shortened, but when the pressure test data shows that the ring stiffness of the wound glass fiber reinforced plastic pipe product with the spiral pitch of below 50mm is only slightly increased, when the spiral pitch is 50-100 mm, the ring stiffness, the Baker hardness, the tensile strength and the deformation rate are not greatly different from those of the sample performance when the spiral pitch is 20-40 mm, and the performance of the sample is obviously better than that of the spiral pitch is 100mm, so that the optimal radial winding scheme of the fiber column is adopted by adopting the fiber column is adopted.

Experiment group 2:

As can be seen from the data of experimental set 2, when pressure was applied to the test specimen up to 6.35kN, the ratio of fiber rod layer diameter to liner diameter was 1:70-1:20, the ring stiffness variation amplitude of the test sample material of the test group 2 is within 100N/m ², and the manufacturing cost of the raw material of the fiber strip column layer and the ring stiffness test data are synthesized; when the ratio of the fiber strip column layer diameter to the liner layer diameter is smaller than 1:70, for example, when the test 2 data set is 1:100-1:70, the ring stiffness is greatly reduced as compared with the liner layer diameter due to the reduction of the fiber strip column layer, and the requirements of the radial ring stiffness and the tensile strength of the pipe are not met. In a comprehensive way, when the ratio of the diameter of the fiber strand column layer to the diameter of the inner liner layer is larger than 1:40, the ring stiffness of the pipe is slowly improved in a small extent, and when the ratio of the diameter of the fiber strand column layer to the diameter of the inner liner layer is smaller than 1:70, the ring stiffness of the pipe is greatly reduced, so that the ratio of the diameter of the fiber strand column layer to the diameter of the inner liner layer is 1:70-1 in the preferable scheme: 40, at this time, the balance between the rigidity of the pipe ring and the manufacturing cost is achieved. At the moment, the ring stiffness, bakelet hardness, tensile strength and deformation rate of the pipe are not greatly different from those of the sample when the diameter ratio of the fiber rod column to the inner liner is larger than 1:40, and the performance of the sample when the diameter ratio of the fiber rod column to the inner liner is larger than 1:70 is obviously better than that of the sample.

The fiber column on the fiber column layer is not doped with any filler except long fibers and resin, and epoxy resin or o-benzene type unsaturated resin is combined, so that the pressure-bearing effect is good, the pressure resistance and the fracture resistance of a pipeline can be enhanced by adopting the structure of the fiber column layer 3, the safety of a conveying system is improved, the materials of the fiber column are saved by adopting the mode of spirally winding and controlling the spiral pitch of the fiber column, and the engineering cost is reduced while the better pressure resistance and corrosion resistance effects are achieved.

Aiming at the ring stiffness performance of the composite structure wall spiral reinforced rigid winding pipe for the underground, performing pressure test comparison by adopting a conventional composite winding type glass fiber reinforced plastic pipe and the composite structure wall spiral reinforced rigid winding pipe, wherein the composite structure wall spiral reinforced rigid winding pipe adopts data that the spiral pitch of a first fiber column is 50 mm-100 mm, the ratio of the diameter of the first fiber column 31 to the diameter of the inner liner 1 is 1:70-1:40, the pipe of a test group 1 and the pipe of a test group 2 are selected, the winding spiral pitch of a fiber column layer is 80mm, and the ratio of the diameter of the fiber column to the diameter of the inner liner is 1:70; intercepting a conventional composite winding type glass fiber reinforced plastic pipe 300mm, a pipeline inner diameter DN1005, a lining layer thickness of 3mm, a middle layer thickness of 15mm and an outer layer thickness of 20mm, and performing a pressure test control test under an external force load of 6.35KN, wherein the test data are as follows:

Control group 1:

according to the data analysis of the control group 1, the buried composite structure wall spiral reinforced rigid winding pipe is improved by more than 5% compared with the three-layer conventional winding pipe commonly seen in the market under the load of 6.35KN, the Bakel hardness, the tensile strength and the deformation rate are improved to a certain extent, the product performance is improved in a breakthrough manner, and the use performance is high.

The embodiment also provides a processing method of the buried composite structure wall spiral reinforced rigid winding pipe, which comprises the following steps:

S1, manufacturing an inner liner 1, wherein glass fiber or basalt fiber and o-type unsaturated resin or epoxy resin are selected and mixed according to a weight ratio of 1:2.5, and a curing agent of 0.3% and an accelerator of 0.2% are added. Cleaning a metal mold, coating a release agent, and uniformly coating the mixture on the inner wall of the mold by using a brush coating method, wherein the thickness is controlled to be 3mm. The mold was cured in an oven at 180 ℃ for half an hour to form a hard and smooth inner liner layer, ensuring barrier effect.

S2, preparing an automatic winding machine, selecting glass fiber or basalt fiber yarn or tape, preparing proper amount of phthalic unsaturated resin or epoxy resin, mixing curing agent and accelerator to ensure that the fiber tape can be fully soaked in the winding process, setting the winding angle of the winding machine, usually between 55 and 57 degrees, placing the cured and cooled lining layer on a die of the winding machine, and ensuring that the surface of the die is flat. The winding machine is started, and the fiber tape pre-coated with epoxy resin is uniformly and reciprocally wound on the inner lining layer 1 to form the reinforcing layer 2. The overlapping and spacing between the tapes is of particular concern when winding to ensure layer-to-layer uniformity and tightness.

S3, preparing a fiber strip column, which specifically comprises the following steps: glass fiber filaments or basalt fiber filaments are selected, epoxy resin or o-benzene type unsaturated resin is prepared, a proper amount of curing agent and accelerator are prepared, and the fiber filaments pass through presoaking equipment to ensure that each filament is uniformly coated with a layer of resin. The fiber filaments coated with the resin are assembled into a cylinder shape through the gathering mechanism, and the stretching speed and the tension are controlled to ensure the diameter consistency and the surface smoothness of the fiber ribbon column.

S4, winding the formed fiber column to the outer surface of the reinforcing layer 2 to form a fiber column layer 3. Wherein the spiral pitch of the wound fiber strip column is 50 mm-100 mm.

S5, after winding is completed, a heating system (such as hot air circulation or infrared heating) is used for solidifying the pipe fitting structure. The curing process is controlled at a specific temperature and time, typically at a curing temperature of 150 ℃ to 200 ℃. After curing is completed, the tube is cooled to room temperature and inspected visually and dimensionally to ensure that the tube is defect free and meets quality standards.

Example 2

As shown in fig. 2-6, this embodiment is different from embodiment 1 in that at least two groups of slots 4 (4 groups are shown in the drawing) penetrating through the reinforcing layer 2 axially are provided on the reinforcing layer 2, second fiber columns 32 are axially inserted into the slots 4, the second fiber columns 32 are inserted into the slots 4 before the first fiber columns 31 are wound around the reinforcing layer 2, the first fiber columns 31 are spirally wound around the reinforcing layer 2 radially and synchronously form a limit for the second fiber columns 32, the free ends of the second fiber columns 32 are reversely wound with each pitch of the first fiber columns 31 until the two free ends of the second fiber columns 32 are connected, ratchet mechanisms 9 are further provided at the two ends of the slots 4, the free ends of the second fiber columns 32 are connected to the balance wheels of the ratchet mechanisms 9, and the purpose of tightening the second fiber columns 32 is achieved by rotating the ratchet mechanisms 9.

The research and development part spirally enhances the rigidity winding pipe material for the buried composite structure wall, a slotted hole and a second fiber column are arranged in the slotted hole, the scheme ring rigidity performance of the pipe material in the embodiment 2 is that the spiral pitch of the first fiber column of the composite structure wall spirally enhances the rigidity winding pipe material in the comparison group 1 is 50 mm-100 mm, the ratio of the diameter of the first fiber column 31 to the diameter of the lining layer 1 is 1:70-1:40, and the specific selection of the pipe material is that the spiral pitch of the winding of the fiber column layer is 80mm, and the ratio of the diameter of the fiber column to the diameter of the lining layer 1:70 is used as the basic comparison; intercepting 300mm of the composite structure wall spiral reinforced rigid winding pipe, DN1005 of the pipe inner diameter, 3mm of the inner lining layer thickness, 15mm of the middle layer thickness and 20mm of the outer layer thickness, and performing a pressure test control test under the external force load of 6.35 KN.

The test method comprises the following steps: the test sample is arranged on the supporting device of the ring stiffness tester, so that the vertical axis of the test sample is ensured to be vertical, and the compression plate of the tester is uniformly contacted with the upper surface of the test sample, thereby avoiding inclination or deflection. Pressure was gradually applied to the test specimen according to ASTM D2412 until a force value of 6.35kN was reached. During the application of force, the radial deformation of the sample was continuously recorded. When the pressure reached 6.35kN, the total deformation at this time was recorded. The pressure was released and the test piece was observed for permanent deformation.

As shown in the following table, the test data were as follows:

control group 2:

Pipe scheme	Applying load (kN)	Ring stiffness (N/m 2)	Bakelite hardness	Tensile Strength (kN/m)	Deformation ratio (%)
						Example 1	6.35	13271.75	53.82	7581	7.04
Example 2	6.35	13683.54	54.78	7743	6.20

According to data analysis of a control group 2, under a load of 6.35KN, compared with the pipe in the example 1, the spiral reinforced rigid winding pipe with the buried composite structure wall in the example 2 has the advantages that the ring rigidity is improved by more than 3%, the Bakelite hardness and the tensile strength are improved to a certain extent, the deformation rate is reduced to a certain extent, and in particular: example 2 the composite structure wall spiral reinforced rigid wound pipe for the ground is improved by more than 8% in radial ring rigidity, more than 3% in Bakelite hardness and tensile strength, and more than 20% in deformation rate compared with the conventional three-layer wound pipe. In summary, the performance of the composite structure wall spiral reinforced rigid winding pipe for the underground use of the embodiment 2 is superior to that of the embodiment pipe, compared with the performance of a conventional three-layer winding glass tank product, the breakthrough type improvement is achieved, the service performance is stronger, and the slotted holes and the second fiber strip columns are arranged, so that the performance of the composite structure wall spiral reinforced rigid winding pipe for the underground use of the embodiment is improved unexpectedly, and the outstanding use effect and remarkable progress are achieved. The limit setting of the second fiber strip column 32 to the first fiber strip column 31 further fastens the spiral structure of the fiber strip column layer, increases the compression resistance and the stability of the composite structure wall spiral reinforced rigid winding pipe, and the second fiber strip column layer 32 has less material consumption, improves various index performances while basically not increasing the manufacturing cost, and has better economic benefit and technical prospect.

The embodiment also provides a processing method of the buried composite structure wall spiral reinforced rigid winding pipe, which comprises the following steps:

S1, manufacturing an inner liner 1, wherein glass fiber or basalt fiber and o-type unsaturated resin or epoxy resin are selected and mixed according to a weight ratio of 1:2.5, and a curing agent of 0.3% and an accelerator of 0.2% are added. Cleaning a metal mold, coating a release agent, and uniformly coating the mixture on the inner wall of the mold by using a brush coating method, wherein the thickness is controlled to be 3mm. The mold was cured in an oven at 180 ℃ for half an hour to form a hard and smooth inner liner layer, ensuring barrier effect.

S2, preparing an automatic winding machine, selecting glass fiber or basalt fiber yarn or tape, preparing proper amount of phthalic unsaturated resin or epoxy resin, mixing curing agent and accelerator to ensure that the fiber tape can be fully soaked in the winding process, setting the winding angle of the winding machine, usually between 55 and 57 degrees, placing the cured and cooled lining layer on a die of the winding machine, and ensuring that the surface of the die is flat. The winding machine is started, and the fiber tape pre-coated with epoxy resin is uniformly and reciprocally wound on the inner lining layer 1 to form the reinforcing layer 2. The overlapping and spacing between the tapes is of particular concern when winding to ensure layer-to-layer uniformity and tightness. After winding, a slot 4 which is axially penetrated is arranged on the reinforcing layer 2, and ratchet mechanisms 9 are arranged at two ends of the slot 4;

S3, preparing a fiber strip column, which specifically comprises the following steps: glass fiber filaments or basalt fiber filaments are selected, epoxy resin or o-benzene type unsaturated resin is prepared, a proper amount of curing agent and accelerator are prepared, and the fiber filaments pass through presoaking equipment to ensure that each filament is uniformly coated with a layer of resin. The fiber filaments coated with the resin are assembled into a cylinder shape through the gathering mechanism, and the stretching speed and the tension are controlled to ensure the diameter consistency and the surface smoothness of the fiber ribbon column.

S4, penetrating the second fiber ribbon columns 32 into the slotted holes 4, taking out the first fiber ribbon columns 31, and winding the fiber ribbon columns on the reinforcing layer 2 through a spiral winding machine, wherein the spiral pitch of the winding of the fiber ribbon columns is 50 mm-100 mm. The free end of the second fibre sliver column 32 is then wound again with each helical pitch of the first fibre sliver column 31, the free end of the second fibre sliver column 32 is connected to the balance of the ratchet mechanism 9, and the ratchet mechanism 9 is rotated to tighten the second fibre sliver column 32.

S5, after the process is completed, a heating system (such as hot air circulation or infrared heating) is used for solidifying the pipe fitting structure. The curing process is controlled at a specific temperature and time, typically at a curing temperature of 150 ℃ to 200 ℃. After curing is completed, the tube is cooled to room temperature and inspected visually and dimensionally to ensure that the tube is defect free and meets quality standards.

Example 3

As shown in fig. 4, the difference between this embodiment and embodiment 2 is that the axial winding place of the first fiber ribbon column 31 and the second fiber ribbon column 32 is provided with the reinforcing rib 8, which further fastens the spiral structure of the fiber ribbon column layer, and increases the compression resistance and stability of the composite structure wall spiral reinforced rigid winding pipe.

Example 4

As shown in fig. 2, 6 and 7, the difference between this embodiment and embodiment 2 is that a limiting ring 5 is further disposed in the slot 4, an adhesive layer is coated on the inner wall of the limiting ring 5, a bump 6 and a locking slot 7 are disposed on the outer wall of the limiting ring 5, the inner wall of the limiting ring 5 is adhered to the slot 4, a second fiber column 32 is disposed on the limiting ring 5 in a penetrating manner, and the limiting ring 5 is coated with the second fiber column 32 and locked with the locking slot 7 through the bump 6. The two ends of the slot hole 4 are also provided with ratchet mechanisms 9, the free ends of the second fiber bar columns 32 are connected to balance wheels of the ratchet mechanisms 9, the ratchet mechanisms 9 are rotated to tighten the second fiber bar columns 32, then the convex blocks 6 and the clamping grooves 7 of the limiting rings 5 are coated on the second fiber bar columns 32, the second fiber bar columns 32 are further limited, and accordingly the bearing capacity of the composite structure wall spiral reinforced rigid winding pipe is further improved.

The effect of spacing ring 5 adheres in slotted hole 4 to spacing ring and enhancement layer bond into an organic whole, wear to place second fibre strip post 32 behind slotted hole 4, utilize lug 6 and draw-in groove 7 on the spacing ring to wrap up the locking with second fibre strip post 32, realize the integrative setting of second fibre strip post 32 and enhancement layer 2, after first fibre strip post 31 spiral winding is repeated at enhancement layer 2 step, wind the free end of second fibre strip post 32 repeatedly along first fibre strip post 21 spiral pitch again, and then form first fibre strip post 31, second fibre strip post 32 and enhancement layer 2 integrative setting, after first fibre strip post 31 breaks under the exogenic action, second fibre strip post 32 plays the limiting displacement to first fibre strip post 31, the broken cliff type of effectively prevented tubular product ring rigidity falls down, reduce the engineering quality accident rate that the product damage arouses.

The embodiment also provides a processing method of the buried composite structure wall spiral reinforced rigid winding pipe, which comprises the following steps:

S1, manufacturing an inner liner 1, wherein glass fiber or basalt fiber and o-type unsaturated resin or epoxy resin are selected and mixed according to a weight ratio of 1:2.5, and a curing agent of 0.3% and an accelerator of 0.2% are added. Cleaning a metal mold, coating a release agent, and uniformly coating the mixture on the inner wall of the mold by using a brush coating method, wherein the thickness is controlled to be 3mm. The mold was cured in an oven at 180 ℃ for half an hour to form a hard and smooth inner liner layer, ensuring barrier effect.

S2, preparing an automatic winding machine, selecting glass fiber or basalt fiber yarn or tape, preparing proper amount of phthalic unsaturated resin or epoxy resin, mixing curing agent and accelerator to ensure that the fiber tape can be fully soaked in the winding process, setting the winding angle of the winding machine, usually between 55 and 57 degrees, placing the cured and cooled lining layer on a die of the winding machine, and ensuring that the surface of the die is flat. The winding machine is started, and the fiber tape pre-coated with epoxy resin is uniformly and reciprocally wound on the inner lining layer 1 to form the reinforcing layer 2. The overlapping and spacing between the tapes is of particular concern when winding to ensure layer-to-layer uniformity and tightness. After winding, a slot 4 which is axially penetrated is formed on the reinforcing layer 2, and a limit ring 5 and a ratchet mechanism 9 are adhered to the two ends of the slot 4;

S3, preparing a fiber strip column, which specifically comprises the following steps: glass fiber filaments or basalt fiber filaments are selected, epoxy resin or o-benzene type unsaturated resin is prepared, a proper amount of curing agent and accelerator are prepared, and the fiber filaments pass through presoaking equipment to ensure that each filament is uniformly coated with a layer of resin. The fiber filaments coated with the resin are assembled into a cylinder shape through the gathering mechanism, and the stretching speed and the tension are controlled to ensure the diameter consistency and the surface smoothness of the fiber ribbon column.

S4, penetrating the second fiber ribbon columns 32 into the slotted holes 4, taking out the first fiber ribbon columns 31, and winding the fiber ribbon columns on the reinforcing layer 2 through a spiral winding machine, wherein the spiral pitch of the winding of the fiber ribbon columns is 50 mm-100 mm. Then the free end of the second fibre sliver column 32 is wound again with each helical pitch of the first fibre sliver column 31, the free end of the second fibre sliver column 32 is connected to the balance wheel of the ratchet mechanism 9, the ratchet mechanism 9 is rotated to tighten the second fibre sliver column 32, and then the lug 6 and the clamping groove 7 of the limiting ring 5 are wrapped around the second fibre sliver column 32.

S5, after the process is completed, a heating system (such as hot air circulation or infrared heating) is used for solidifying the pipe fitting structure. The curing process is controlled at a specific temperature and time, typically at a curing temperature of 150 ℃ to 200 ℃. After curing is completed, the tube is cooled to room temperature and inspected visually and dimensionally to ensure that the tube is defect free and meets quality standards.

The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (9)

1. The spiral reinforced rigid winding pipe with the composite structure wall for the underground is of a composite structure, and comprises an inner liner layer (1), a reinforcing layer (2) and a fiber strip column layer (3) which are adhered into a whole from inside to outside; the method is characterized in that: the fiber strip column layer (3) is formed by spirally and radially winding a first fiber strip column (31) on the outer side of the reinforcing layer (2) and fastening, wherein the spiral pitch of the first fiber strip column (31) is 50 mm-100 mm, the ratio of the diameter of the first fiber strip column (31) to the diameter of the inner liner (1) is 1:70-1:40, the first fiber strip column (31) comprises an inner core and a glass fiber binding belt wound outside the inner core, the inner core is formed by mixing and curing glass fibers or basalt fibers and resin, and the resin is epoxy resin or o-benzene type unsaturated resin.

2. The composite structural wall spiral reinforced rigid wrap tubing for use in a subterranean formation of claim 1, wherein: the reinforcing layer (2) is provided with at least two groups of slots (4) which axially penetrate through the reinforcing layer (2), a second fiber column (32) is axially arranged in the slots (4) in a penetrating mode, the second fiber column (32) is arranged in the slots (4) in a penetrating mode before the first fiber column (31) is wound around the reinforcing layer (2), the first fiber column (31) is spirally and radially wound on the reinforcing layer (2) to synchronously form limiting of the second fiber column (32), and the free end of the second fiber column (32) is reversely wound with each pitch of the first fiber column (31) until two free ends of the second fiber column (32) are connected.

3. The composite structural wall spiral reinforced rigid wrap tubing for use in a subterranean formation of claim 2, wherein: the first fiber column (31) and the second fiber column (32) are axially wound with a reinforcing rib (8).

4. A composite structural wall spiral reinforced rigid wrap tubing for use in a subterranean formation according to claim 3, wherein: a limiting ring (5) is further arranged in the slotted hole (4), an adhesive layer is coated on the inner wall of the limiting ring (5), and a lug (6) and a locking slot (7) which are locked are arranged on the outer wall of the limiting ring (5); the inner wall of the limiting ring (5) is adhered in the slotted hole (4), the second fiber strip column (32) is arranged on the limiting ring (5) in a penetrating mode, and the limiting ring (5) is coated on the second fiber strip column (32) and locked through the protruding block (6) and the clamping groove (7).

5. The buried composite structural wall helically reinforced rigid wound pipe of claim 4, wherein: the two ends of the slot hole (4) are also provided with ratchet mechanisms (9), and the free ends of the second fiber strip columns (32) are connected to balance wheels of the ratchet mechanisms (9).

6. A composite structural wall spiral reinforced rigid wrap tubing for use in a subterranean formation according to any of claims 1-5, wherein: the included angle between the first fiber column (31) and the axis of the reinforcing layer (2) is 55-57 degrees.

7. The method for processing the buried composite structural wall spiral reinforced rigid winding pipe according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:

s1, mixing epoxy resin or o-benzene type unsaturated resin with short fibers, and cooling for standby after high-temperature solidification molding to prepare a composite pipeline lining layer (1);

S2, utilizing glass fiber or basalt fiber adhered with resin to reciprocally wind and form a reinforcing layer (2) on the surface of the inner liner (1) of the composite pipeline;

s3, gathering glass fibers or basalt fibers after mixing resin, and winding and fixing the glass fibers or basalt fibers by using a glass fiber binding belt to prepare a fiber strip column;

s4, winding the uncured fiber strip column along a direction and fixing the uncured fiber strip column outside the reinforcing layer (2) for standby;

s5, curing and forming the pipe fitting manufactured in the step S4 at high temperature.

8. The method for processing the spiral reinforced rigid winding pipe with the buried composite structure wall according to claim 7, wherein the method comprises the following steps: step S1, selecting one of epoxy resin or o-type unsaturated resin as a base material, and mixing with short fibers in proportion; pouring the mixture into a pre-prepared mold under the heating condition, maintaining the temperature at 150-200 ℃, completing high-temperature curing, and gradually cooling to room temperature to avoid the generation of internal stress, thereby forming a uniform and defect-free inner liner (1); step S2, adopting glass fiber or basalt fiber, pre-dip-coating resin which is the same as or compatible with the lining layer (1) by the glass fiber or basalt fiber, carrying out reciprocating winding on the surface of the lining layer (1) by using an automatic winding machine, and reinforcing the mechanical strength and the compressive capacity of the pipeline by repeatedly winding the reinforcing layer (2); and S3, placing the wound pipe in a high-temperature curing furnace, controlling the temperature to be 150-200 ℃, adjusting the curing time according to the characteristics of a resin system, and performing the pipe under controlled temperature and pressure in the curing process to ensure complete curing and good adhesion of fibers and resin, and performing cooling treatment after curing molding to ensure the dimensional stability of the pipe and reduce internal stress.

9. The method for processing the buried composite structural wall spiral reinforced rigid winding pipe according to claim 5, wherein the method comprises the following steps: the method comprises the following steps:

S1, mixing epoxy resin or o-benzene type unsaturated resin with short fibers, and cooling for standby after high-temperature curing molding to prepare a composite pipeline lining layer;

S2, a reinforcing layer (2) is formed by winding glass fiber or basalt fiber adhered with resin on the surface of the inner liner (1) of the composite pipeline in a reciprocating mode, a slot hole (4) which is penetrated in the axial direction is formed in the reinforcing layer (2), limiting rings (5) are adhered to two ends of the slot hole (4), and a ratchet mechanism (9) is arranged;

s3, gathering glass fibers or basalt fibers after mixing resin, and winding and fixing the glass fibers or basalt fibers by using a glass fiber binding belt to prepare a fiber strip column;

S4, penetrating a second fiber column (32) into each slot hole (4), taking out a first fiber column (31), winding the fiber column on the reinforcing layer (2) through a spiral winding machine, then winding the free end of the second fiber column (32) and each spiral pitch of the first fiber column (31) again, connecting the free end of the second fiber column (32) to a balance wheel of a ratchet mechanism (9), rotating the ratchet mechanism (9) to tighten the second fiber column (32), and then wrapping the second fiber column by a lug (6) and a clamping groove (7) of a limiting ring (5);

s5, curing and forming the pipe fitting manufactured in the step S4 at high temperature.