CN111271524B - Construction method of glass fiber reinforced plastic sand inclusion water supply pipe - Google Patents
Construction method of glass fiber reinforced plastic sand inclusion water supply pipe Download PDFInfo
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- CN111271524B CN111271524B CN202010066683.6A CN202010066683A CN111271524B CN 111271524 B CN111271524 B CN 111271524B CN 202010066683 A CN202010066683 A CN 202010066683A CN 111271524 B CN111271524 B CN 111271524B
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- sealing ring
- water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/11—Accessories therefor, e.g. anchors for the detection or protection of pipes in the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
- F16L21/065—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends tightened by tangentially-arranged threaded pins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/04—Preventing, monitoring, or locating loss by means of a signalling fluid enclosed in a double wall
Abstract
The invention discloses a construction method of a glass fiber reinforced plastic sand inclusion water supply pipe, which relates to a pipeline construction method and adopts the technical scheme that: the method comprises the following steps: step S2: sleeving a second pipe through the flaring section outside the end part of the first pipe, and enabling a pressure testing hole to be positioned between the first sealing ring and the second sealing ring; step S3: a hollow screw is arranged in the pressure test hole; step S4: injecting water into the sealed space, then installing a pressure test tool on the hollow screw rod, and carrying out a sealing test on the sealed space; step S5: if the test is qualified, go to step S51: the pressure test tool is disassembled, and a solid screw is connected in the through hole in a threaded manner; and if the test is unqualified, the second pipe is remounted or adjusted and then tested until the test is qualified. The construction method can protect the pressure test hole of the pipeline from being damaged by arranging the hollow screw; the first fixing piece and the second fixing piece are arranged, so that the axial connection strength between the first pipe and the second pipe is improved; by arranging the water stop ring, the sealing performance between the first pipe and the second pipe is further improved.
Description
Technical Field
The invention relates to a pipeline construction method, in particular to a construction method of a glass fiber reinforced plastic sand inclusion water supply pipe.
Background
The glass fiber reinforced winding sand inclusion pipe (glass fiber reinforced plastic sand inclusion pipe for short) is a flexible composite pipe widely popularized and used in China at present, and is widely applied to the fields of water supply transportation, sewage discharge and the like.
The current chinese utility model patent that the bulletin number of granting is CN206072567U discloses a glass steel presss from both sides sand high-pressure tube, including the body, the one end of body sets up the pipeline bellmouth, and the other end of body sets up the pipeline socket, and the external diameter of pipeline socket equals the internal diameter of pipeline bellmouth, body are including inner structure layer, metal steel mesh layer, quartz sand layer and the outer structure layer of arranging in proper order, and metal steel mesh layer and inner structure layer and the inseparable adhesion of quartz sand layer pass through the inseparable adhesion metal steel mesh layer of resin and outer structure layer. The outer surface at pipeline socket sets up the seal groove to set up the sealing washer in the seal groove, preferred rubber seal, when glass steel presss from both sides sand high-pressure pipe installation and uses, rubber seal seals with seal groove and pipeline bellmouth. Preferably, two sealing grooves are arranged, and two rubber sealing rings are selected. The side wall of the pipeline bell mouth is provided with a pressure test hole, the pressure test hole is a through hole and is communicated with the inside of the pipe of the glass fiber reinforced plastic sand inclusion high-pressure pipe, and the pressure test hole is positioned between the two sealing grooves.
The existing construction method for the glass sand inclusion pipe comprises a leakage test step, if leakage is found during leakage test, two butted pipelines need to be detached, and the two pipelines are installed back after inspection and repair are finished to perform leakage test again. The frock for leak testing must be taken off from the pressure testing hole during dismouting pipeline, if the frock is dismouting repeatedly or the application of force is too big, because the softer material of body, the pore wall that leads to the pressure testing hole easily produces the damage, and this damage is difficult to restore, will scrap whole pipeline even when serious.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction method of a glass fiber reinforced plastic sand inclusion water supply pipe, wherein a pressure test hole arranged in a pipeline is not easy to damage.
The technical purpose of the invention is realized by the following technical scheme: a construction method of a glass fiber reinforced plastic sand inclusion water supply pipe comprises a first pipe and a second pipe, wherein the second pipe comprises a flaring section located at the end part, the flaring section can be sleeved outside the end part of the first pipe, the outer wall of the first pipe and the inner wall of the flaring section establish sealing through a first sealing ring and a second sealing ring which are arranged between the first pipe and the flaring section, and the second sealing ring is close to the second pipe; the first pipe is pre-installed as a front pipe and comprises the following steps:
step S1: digging a pit for installing the second pipe on the ground; drilling a pressure test hole on the outer wall of the flaring section, wherein the pressure test hole penetrates through the wall surface of the flaring section, and the position of the selected pressure test hole is as follows: after the first pipe and the second pipe are sleeved and connected, the pressure testing hole is just positioned between the first sealing ring and the second sealing ring;
step S2: hoisting a second pipe, sleeving the second pipe outside the end part of the first pipe through the flaring section, and enabling the pressure test hole to be positioned at the top of the flaring section and the pressure test hole to be positioned between the first sealing ring and the second sealing ring; the first sealing ring, the second sealing ring, the first pipe and the second pipe surround to form a sealing space;
step S3: a hollow screw is arranged in the pressure testing hole, the outer wall of the hollow screw and the inner wall of the pressure testing hole are sealed, and a through hole is formed in the hollow screw and penetrates through two ends of the hollow screw;
step S4: injecting water into the sealed space, then installing a pressure test tool on the hollow screw rod, and carrying out a sealing test on the sealed space;
step S5: determining to perform step S51 or step S52 according to the test result of step S4:
if the test is qualified, go to step S51: the pressure test tool is disassembled, a solid screw is connected in the through hole in a threaded manner, and the solid screw seals the through hole; if the test fails, go to step S52: detaching the pressure test tool, separating the first pipe and the second pipe, reinstalling or adjusting the second pipe, testing the second pipe until the test is qualified, and executing the step S51 after the test is qualified;
step S6: and filling soil back into the pit to bury the first pipe and the second pipe.
By the technical scheme, the butt joint construction of the first pipe and the second pipe can be completed, and the sealing performance between the first pipe and the second pipe is tested. According to the construction method, the hollow screw is arranged, so that when the pressure test tool is repeatedly disassembled and assembled, the hollow screw is not easy to damage; even if the hollow screw rod is damaged, the hollow screw rod can be replaced. The disassembly and assembly frequency of the hollow screw is far lower than that of a pressure test tool, and a pressure test hole of the pipeline can be protected from being damaged.
Preferably, in step S1, after the pit is dug in the ground, a work pit corresponding to a position directly below the joint of the first pipe and the second pipe is further dug in the pit bottom.
Through the technical scheme, the working pit can be used for making sufficient space for the construction of the pipe I and the pipe II by personnel, and is not easy to influence the stability of the pipe I and the pipe II during installation.
Preferably, the step S6 further includes: before backfilling, a gap between the first pipe and the second pipe facing the port of the flaring section is sealed by the first sealing ring through filler.
Through the technical scheme, in certain areas, soil or underground water possibly corrodes the first sealing ring, and the first sealing ring can be separated from the soil or the underground water through the filler, so that the service life of the first sealing ring is prolonged.
Preferably, in step S2, when the second handling pipe approaches the first handling pipe, the probe is used to determine the axial relative position of the first handling pipe and the second handling pipe, so as to determine that the pressure testing hole is located right between the first sealing ring and the second sealing ring.
Through the technical scheme, when the lifting pipe II is close to the pipe I, the axial relative position of the pipe I and the pipe II is determined by the stock rod, so that the pressure test hole is determined to be just positioned between the sealing ring I and the sealing ring II.
Preferably, after the step S2 is completed, the first pipe and the second pipe are fixed by being padded under the first pipe and the second pipe by sand bags.
Through above-mentioned technical scheme, the sand bag can conveniently carry and the adjustment position, plays the effect of interim registration arm tip and pipe two.
Preferably, the pressure testing tool comprises a three-way joint, an air compression pump and an exhaust valve, and three openings of the three-way joint are communicated with the air compression pump, the exhaust valve and the through hole respectively.
Through the technical scheme, the components of the pressure test tool are common, and can be conveniently manufactured and assembled.
Preferably, the outer wall of the first pipe is provided with a plurality of first groove parts, the first groove parts extend along the circumferential direction of the first pipe, the outer wall of the flaring section is provided with a plurality of second groove parts, and the second groove parts extend along the circumferential direction of the flaring section; the first groove part is clamped with a first detachable fixing piece, the first fixing piece comprises a first fixing plate extending along the first pipe in the radial direction, the second groove part is clamped with a second detachable fixing piece, and the second fixing piece comprises a second fixing plate extending along the flaring section in the radial direction;
in step S52, a driving element is disposed between the first fixing plate and the second fixing plate, and the driving element drives the first fixing plate and the second fixing plate to move away from each other, so as to separate the first tube from the second tube.
Through the technical scheme, the first fixing piece can be stably installed on the outer wall of the first pipe, and the second fixing piece can be stably installed on the outer wall of the flaring section. When the first pipe and the second pipe are required to be separated, the first fixing plate and the second fixing plate can provide force application points for the driving piece, and the first pipe and the second pipe are convenient to separate.
Preferably, the driving piece is a spring, the elastic force direction of the spring is along the axial direction of the first pipe and the second pipe, the driving piece is distributed along the circumferential direction of the first pipe and the circumferential direction of the second pipe, and the number of the driving pieces is gradually increased when the driving piece is installed.
Through above-mentioned technical scheme, the spring can conveniently purchase, and need not the energy supply. And manually compressing the spring and then placing the compressed spring between the first fixing plate and the second fixing plate to gradually increase the number of the driving parts. When the number of the driving parts is large, the combined thrust of the driving parts applies force to the first fixing plate and the second fixing plate, and the combined total thrust of the driving parts is large, so that the first pipe and the second pipe can be conveniently separated.
Preferably, the first fixing plate is circumferentially provided with a plurality of first mounting holes, the second fixing plate is circumferentially provided with a plurality of second mounting holes, and the second mounting holes are opposite to the first mounting holes one by one; the step S6 further includes: and before backfilling, taking a fixing stud to simultaneously penetrate through the first mounting hole and the second mounting hole, and connecting the first fixing plate and the second fixing plate through the fixing stud through a fixing nut.
Through the technical scheme, the fixing studs are installed, the relative positions of the first fixing part and the second fixing part are fixed, the first fixing part and the second fixing part fix the axial relative positions of the first pipe and the second pipe, the axial connection strength between the first pipe and the second pipe is improved, and the geological change resistance of the first pipe and the second pipe is improved.
Preferably, the step S1 further includes: a water stop ring is sleeved outside the first pipe, the water stop ring is made of water-swelling rubber, the width of the water stop ring is smaller than the width of a gap between the outer wall of the first pipe and the inner wall of the flaring section, the water stop ring is adhered to one end part, facing the second pipe, of the sealing ring II through glue, the glue is of a type which fails when encountering water, the lower part of the inner annular wall of the water stop ring is tightly attached to the outer bottom wall of the first pipe, and a gap is reserved between the upper part of the inner annular wall of the water stop ring and the outer top wall of the first pipe; and after the water stop ring is completely expanded when meeting water, sealing is established between the outer wall of the pipe and the inner wall of the flaring section.
Through the technical scheme, when the second pipe and the first pipe are assembled, the water stop ring cannot obstruct the assembly of the first pipe and the flared section. When the tightness test is carried out, if water leaks from the second sealing ring, the water flows downwards under the action of self gravity because the leakage amount of the water is generally small, and the leaked water is not easy to touch the water stop ring and the glue layer to cause the water stop ring to lose efficacy because the water stop ring is stuck to the upper part of the first pipe. After the first pipe and the second pipe are used as water supply pipes to supply water, the water in the pipes is in full contact with the glue layer beside the water stop ring to enable the glue layer to be invalid, the water stop ring expands when meeting water, and sealing is built between the outer wall of the first pipe and the inner wall of the flaring section after the water stop ring is completely expanded. The water stop ring is matched with the second sealing ring and the first sealing ring to form a three-layer sealing structure, so that the sealing performance between the first pipe and the second pipe is further improved.
In summary, compared with the prior art, the beneficial effects of the invention are as follows:
1. by arranging the hollow screw, the pressure test hole of the pipeline can be protected from being damaged when the pressure test tool is repeatedly disassembled and assembled;
2. the first fixing piece and the second fixing piece are arranged, so that the axial connection strength between the first pipe and the second pipe is improved;
3. by arranging the water stop ring, the sealing performance between the first pipe and the second pipe is further improved.
Drawings
FIG. 1 is a structural diagram of a first pipe and a second pipe in the first embodiment;
FIG. 2 is an exploded view of the first tube, the second tube, the first fixing member and the second fixing member according to the first embodiment;
FIG. 3 is a diagram illustrating steps S2-S4 according to the first embodiment;
FIG. 4 is an enlarged view of FIG. 3 at A;
FIG. 5 is a diagram illustrating step S52 according to the first embodiment;
FIG. 6 is a diagram illustrating step S6 according to the first embodiment;
fig. 7 is a schematic diagram of step S6 in the second embodiment.
In the figure, 1, tube one; 2. a second pipe; 21. a flared section; 31. a first sealing ring; 32. a second sealing ring; 11. a first groove part; 22. a groove part II; 4. a working pit; 23. pressure testing holes; 5. a water stop ring; 6. a first fixing part; 7. a second fixing part; 61. a first fixing plate; 71. a second fixing plate; 62. probing a rod; 10. sealing the space; 24. a hollow screw; 241. a through hole; 8. a pressure test tool; 81. a three-way joint; 82. a compression pump; 83. an exhaust valve; 242. a solid screw; 611. a first mounting hole; 711. a second mounting hole; 91. a drive member; 612. mounting grooves; 92. fixing the stud; 93. and (5) fixing the nut.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, the invention discloses a construction method of a glass fiber reinforced plastic sand inclusion water supply pipe, the glass fiber reinforced plastic sand inclusion water supply pipe comprises a pipe I1 and a pipe II 2, the pipe II 2 comprises a flaring section 21 positioned at the end part, and the flaring section 21 can be sleeved outside the end part of the pipe I1. The outer wall of the first pipe 1 and the inner wall of the flaring section 21 are sealed through a first sealing ring 31 and a second sealing ring 32 which are arranged between the first pipe 1 and the flaring section, the first sealing ring 31 and the second sealing ring 32 are arranged at intervals along the axial direction of the first pipe 1, wherein the second sealing ring 32 is closer to the second pipe 2 than the first sealing ring 31, and the first sealing ring 31 and the second sealing ring 32 are embedded into the outer wall of the first pipe 1 in a mode of forming annular grooves. The outer wall of the first pipe 1 is provided with a plurality of first groove parts 11, the first groove parts 11 extend along the circumferential direction of the first pipe 1 to form a ring shape, the outer wall of the flaring section 21 is provided with a plurality of second groove parts 22, and the second groove parts 22 extend along the circumferential direction of the flaring section 21 to form a ring shape; the first groove part 11 is integrally formed during production of the first pipe 1, and the second groove part 22 is integrally formed during production of the second pipe 2. The first pipe 1 and the second pipe 2 are substantially identical pipe members, wherein the first pipe 1 is used as a front pipe which is already installed, and the second pipe 2 is used as a rear pipe to be installed.
The construction method comprises the following steps:
step S1: referring to fig. 2 and 3, a pit for installing the second pipe 2 is dug on the ground, and a work pit 4 is further dug at the bottom of the pit, wherein the work pit 4 corresponds to the position right below the joint of the first pipe 1 and the second pipe 2. Get pressure testing hole 23 at flaring section 21 outer wall drilling, form the screw hole with the tapping of pressure testing hole 23, pressure testing hole 23 runs through flaring section 21's wall, selects the position in pressure testing hole 23 to be: after the first pipe 1 and the second pipe 2 are sleeved, the pressure testing hole 23 is just positioned between the first sealing ring 31 and the second sealing ring 32.
Establish water ring 5 at a 1 overcoat of pipe, water ring 5 is made by meeting water inflation rubber, and the width of water ring 5 slightly is less than 1 outer wall of pipe, the clearance width between the inner wall of flaring section 21, and water ring 5 pastes in two 32 pipe 1 tip towards pipe two 2 of sealing washer through glue, and used glue is for meeting the kind of water inefficacy, and common glue all is this kind, can conveniently purchase and obtain, for example polyvinyl acetate emulsion glue (commonly known as opalescence), does not describe herein repeatedly. When the water stop ring 5 is pasted, the lower part of the inner ring wall of the water stop ring 5 is tightly attached to the outer bottom wall of the pipe I1, and a gap is reserved between the upper part of the inner ring wall of the water stop ring 5 and the outer top wall of the pipe I1.
Step S2: the construction method needs to use a first fixing piece 6 and a second fixing piece 7 which are manufactured in advance. The first fixing part 6 is of a structure with two semi-rings, the two semi-rings are combined into a ring through the outer wall of the first fitting pipe 1, and the two semi-rings are pressed and fixed through bolts and nuts arranged at two ends. The first fixing piece 6 is provided with a protruding strip which is matched with the first groove part 11 towards the first pipe 1, the first fixing piece 6 is used for being installed in the first groove part 11 of the first pipe 1, and after the first fixing piece 6 is installed, the first groove part 11 limits the first fixing piece 6 to slide along the axial direction of the first pipe 1. The first fixing member 6 comprises a first fixing plate 61 extending along the radial direction of the first pipe 1, and the first fixing plate 61 is combined into an annular plate. The structure of the second fixing piece 7 is similar to that of the first fixing piece 6, but the size of the second fixing piece 7 is larger than that of the first fixing piece 6, and the second fixing piece 7 is used for being clamped in the groove part two 22; the second fixing piece 7 comprises a second fixing plate 71 extending along the radial direction of the flaring section 21, and the second fixing plates 71 are combined into an annular plate. The plate surfaces of the first fixing plate 61 and the second fixing plate 71 are parallel to each other and have the same outer diameter, a probe 62 is fixed to the end surface of the first fixing member 6 facing the second fixing member 7, and the probe 62 extends in the axial direction of the first pipe 1.
Hoisting the second pipe 2, sleeving the second pipe 2 outside the end part of the first pipe 1 through the flaring section 21, enabling the pressure test hole 23 to be positioned at the top of the flaring section 21, enabling the pressure test hole 23 to be positioned between the first sealing ring 31 and the second sealing ring 32, and enabling the water stop ring 5 not to obstruct the assembly of the first pipe 1 and the flaring section 21; the first sealing ring 31, the second sealing ring 32, the first pipe 1 and the second pipe 2 surround to form a sealed space 10. When the lifting pipe II 2 is close to the pipe I1, the distance between the fixing piece I6 and the fixing piece II 7 is determined by the probe 62, and then the axial relative position of the pipe I1 and the pipe II 2 is determined, so that the pressure test hole 23 is determined to be positioned between the sealing ring I31 and the sealing ring II 32.
And then the positions of the first pipe 1 and the second pipe 2 are fixed by using sand bags filled below the first pipe 1 and the second pipe 2, and the sand bags can be conveniently carried and adjusted to play a role in temporarily positioning the end part of the first pipe 1 and the second pipe 2.
Step S3: referring to fig. 3 and 4, a hollow screw 24 made of a metal material is installed in the pressure test hole 23, the hollow screw 24 is preferably made of stainless steel, a rubber gasket is provided between the outer wall of the hollow screw 24 and the inner wall of the pressure test hole 23 to seal the pressure test hole, a through hole 241 is provided in the hollow screw 24, and the through hole 241 penetrates through both ends of the hollow screw 24.
Step S4: water is injected into the sealed space 10 through the through hole 241 until the sealed space 10 is filled with water. Then, the pressure test tool 8 is taken out, and the pressure test tool 8 is installed on the hollow screw 24. The pressure test tool 8 comprises a three-way connector 81, a pressure air pump 82 and an exhaust valve 83, three through holes of the three-way connector 81 are respectively communicated with the pressure air pump 82, the exhaust valve 83 and a through hole 241, and the three-way connector 81 and the through hole 241 are fixed in a threaded connection mode and sealed through rubber pads. The exhaust valve 83 is of a manual type, the compression pump 82 is of a hand-operated type, and the air outlet end of the compression pump 82 is provided with a pressure gauge, so that people can know the output pressure value conveniently.
And (3) carrying out a sealing test on the sealed space 10 by using a pressure test tool 8. The test method comprises the following steps: after the pressure test tool 8 is installed, the exhaust valve 83 is in a normally closed state, pressurization is carried out in the sealed space 10 through the pressure pump 82, the pressure is maintained for a period of time after the pressure is increased to the working pressure when the pipeline normally supplies water, and the leakage is not caused at the joint of the first inspection pipe 1 and the second inspection pipe 2. When specific judgment is carried out, if a person observes water leakage from the outer side of the first pipe 1, leakage exists at the first sealing ring 31; if no water leakage is observed from the outer side of the first pipe 1, but the indication number of the pressure gauge is gradually reduced, the second sealing ring 32 leaks. Whether the first sealing ring 31 or the second sealing ring 32 has leakage, the pressure test is unqualified.
If water leaks from the second sealing ring 32, the water flows downwards under the action of self gravity because the leakage amount of the water is generally small, and the water stop ring 5 is adhered to the position of the first pipe 1, so that the leaked water is not easy to touch the water stop ring 5 and the glue layer is not easy to touch to cause the water stop ring to lose efficacy. Even if the first pipe 1 and the second pipe 2 are repeatedly disassembled and assembled and retested due to unqualified sealing tests, the water stop ring 5 and the glue layer are not easy to contact with water.
If no leakage exists, the test pressure is increased to be 1.5 times of the working pressure, the air compression pump 82 keeps the pressure for observing for 10 minutes, and if the pressure drop speed of the pressure gauge is within the allowable range and the appearance inspection is qualified when no leakage exists.
Step S5: it is determined according to the test result of step S4 to perform step S51 or step S52.
If the test is qualified, go to step S51: the pressure test tool 8 is disassembled, the solid screw 242 is connected with the through hole 241 through threads, a rubber pad is arranged between the solid screw 242 and the through hole 241 to establish sealing, and the solid screw 242 seals the through hole 241.
If the test fails, go to step S52: referring to fig. 5, the pressure testing tool 8 is removed, and the first pipe 1 and the second pipe 2 are separated. The first fixing plate 61 is provided with a plurality of first mounting holes 611 along the circumferential direction, the second fixing plate 71 is provided with a plurality of second mounting holes 711 along the circumferential direction, and the second mounting holes 711 are opposite to the first mounting holes 611 one by one. During separation, set up driving piece 91 between fixed plate one 61, fixed plate two 71, driving piece 91 is the spring, the elasticity direction of spring is along pipe one 1, the axial of pipe two 2, driving piece 91 distributes along pipe one 1, the circumference of pipe two 2 has a plurality ofly, fixed plate one 61 is equipped with mounting groove 612 towards the face of fixed plate two 71, mounting groove 612 and mounting hole 611 one-to-one, mounting hole 611 is located the tank bottom of mounting groove 612, mounting groove 612 supplies spring tip to put into and fixes a position it. The spring is manually compressed and then placed between the first fixing plate 61 and the second fixing plate 71, and the number of the driving pieces 91 is gradually increased. When the number of the driving members 91 is large, the combined thrust of the driving members 91 applies force to the first fixing plate 61 and the second fixing plate 71, so that the first pipe 1 and the second pipe 2 can be separated conveniently.
In another embodiment, the driving member 91 can be a lever or a cylinder, and the first fixing plate 61 and the second fixing plate 71 can provide a force application point for the driving member 91.
After separating the flared section 21 from the first pipe 1, a person checks the sealing position, finds out the reason for water leakage, reinstalls or adjusts the second pipe 2, and then tests until the test is qualified, and executes the step S51 after the test is qualified.
Step S6: and a gap between the first pipe 1 and the second pipe 2 facing the port of the flaring section 21 is sealed by the first sealing ring 31 through filling. In some areas, soil or underground water may corrode the first sealing ring 31, and the soil or underground water can be separated from the first sealing ring 31 by the filler, so that the service life of the first sealing ring 31 is prolonged. The filler can be selected from asphalt cement, asphalt hemp thread or asphalt sawdust.
Referring to fig. 6, the fixing stud 92 is inserted through the first mounting hole 611 and the second mounting hole 711 which are opposite to each other, and the fixing stud 92 connects and fixes the first fixing plate 61 and the second fixing plate 71 through the fixing nut 93. The fixing screw 92 is in threaded connection with the fixing nut 93, two sides of the plate surface of the first fixing plate 61 respectively abut against one fixing nut 93, and two sides of the plate surface of the second fixing plate 71 also respectively abut against one fixing nut 93. Through the installation of the fixing stud 92, the relative positions of the first fixing piece 6 and the second fixing piece 7 are fixed, the first fixing piece 6 and the second fixing piece 7 fix the axial relative positions of the first pipe 1 and the second pipe 2, the axial connection strength between the first pipe 1 and the second pipe 2 is improved, and the capacity of the first pipe 1 and the second pipe 2 for resisting geological changes is improved.
Then filling soil back into the pit to bury the first pipe 1 and the second pipe 2, and finishing the butt joint construction of the glass fiber reinforced plastic sand-filled water supply pipe; the construction method is repeated when the next pipe is constructed. After the first pipe 1 and the second pipe 2 are used as water supply pipes to supply water, the water in the pipes is in full contact with the glue layer beside the water stop ring 5 to enable the glue layer to be invalid, the water stop ring 5 expands when meeting water, and sealing is established between the outer wall of the first pipe 1 and the inner wall of the flaring section 21 after the water stop ring 5 is completely expanded. The water stop ring 5, the second sealing ring 32 and the first sealing ring 31 are matched to form a three-layer sealing structure, and the sealing performance between the first pipe 1 and the second pipe 2 is further improved.
In conclusion, the hollow screw 24 is arranged, and the hollow screw 24 is made of wear-resistant metal, so that the hollow screw 24 is not easy to damage when the pressure test tool 8 is repeatedly disassembled and assembled; even if the hollow screw 24 is damaged, the hollow screw 24 can be replaced; the disassembly and assembly frequency of the hollow screw 24 is far lower than that of the pressure test tool 8, and the pressure test hole 23 of the pipeline can be protected from being damaged. Meanwhile, the construction method can improve the corrosion resistance and the geological change resistance of the butted pipelines and prolong the service life of the pipelines.
Example two:
the second embodiment is different from the first embodiment in that:
referring to fig. 7, in step S6, before the fixing stud 92 is inserted through the first and second opposite mounting holes 611 and 711, a spring as the driving member 91 is first installed in the mounting groove 612, and then the fixing stud 92 is inserted through the first and second opposite mounting holes 611 and 711, so that the fixing stud 92 is inserted through the corresponding driving member 91. When the fixing nut 93 is mounted, the fixing nut 93 is only disposed on two surfaces of the first fixing plate 61 and the second fixing plate 71 which are separated from each other. The fixing nut 93 limits the first fixing plate 61 and the second fixing plate 71 to be away from each other, and the elastic force of the driving element 91 acts on the first fixing plate 61 and the second fixing plate 71 to enable the fixing plates to be tightly abutted against the fixing nut 93.
Thus, the fixing bolt 92 and the fixing nut 93 can rigidly restrict the first and second pipes 1 and 2 from moving away from each other, and when the first and second pipes 1 and 2 move closer to each other, the spring as the driving member 91 can be compressed. When the geology changes, the pipe I1 and the pipe II 2 can be close to each other to slide, so that the length of the whole pipeline is shortened to some extent, and the effect of preventing the pipeline from being axially extruded and broken is achieved.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. A construction method of a glass fiber reinforced plastic sand inclusion water supply pipe comprises a first pipe (1) and a second pipe (2), wherein the second pipe (2) comprises a flaring section (21) located at the end part, the flaring section (21) can be sleeved outside the end part of the first pipe (1), the outer wall of the first pipe (1) and the inner wall of the flaring section (21) are sealed through a first sealing ring (31) and a second sealing ring (32) which are arranged between the first pipe (1) and the flaring section, and the second sealing ring (32) is close to the second pipe (2); the first pipe (1) is pre-installed as a front pipe, and is characterized in that: the outer wall of the first pipe (1) is provided with a plurality of first groove parts (11), the first groove parts (11) extend along the circumferential direction of the first pipe (1), the outer wall of the flaring section (21) is provided with a plurality of second groove parts (22), and the second groove parts (22) extend along the circumferential direction of the flaring section (21); the first groove part (11) is clamped with a first detachable fixing piece (6), the first fixing piece (6) comprises a first fixing plate (61) extending along the radial direction of the first pipe (1), the second groove part (22) is clamped with a second detachable fixing piece (7), and the second fixing piece (7) comprises a second fixing plate (71) extending along the radial direction of the flaring section (21); the construction method comprises the following steps:
step S1: digging a pit for installing the second pipe (2) on the ground; drilling pressure testing hole (23) at flaring section (21) outer wall, pressure testing hole (23) run through the wall of flaring section (21), and the position of selecting pressure testing hole (23) does: after the sleeve joint of the first pipe (1) and the second pipe (2) is completed, the pressure testing hole (23) is just positioned between the first sealing ring (31) and the second sealing ring (32);
step S2: hoisting the second pipe (2), sleeving the second pipe (2) outside the end part of the first pipe (1) through the flaring section (21), enabling the pressure test hole (23) to be located at the top of the flaring section (21), and enabling the pressure test hole (23) to be located between the first sealing ring (31) and the second sealing ring (32); the first sealing ring (31), the second sealing ring (32), the first pipe (1) and the second pipe (2) surround to form a sealing space (10);
step S3: a hollow screw (24) is arranged in the pressure test hole (23), the outer wall of the hollow screw (24) and the inner wall of the pressure test hole (23) are sealed, a through hole (241) is arranged in the hollow screw (24), and the through hole (241) penetrates through two ends of the hollow screw (24);
step S4: injecting water into the sealed space (10), then installing a pressure test tool (8) on the hollow screw (24), and carrying out a sealing test on the sealed space (10);
step S5: determining to perform step S51 or step S52 according to the test result of step S4:
if the test is qualified, go to step S51: detaching the pressure testing tool (8), connecting a solid screw (242) in the through hole (241) in a threaded manner, and sealing the through hole (241) by the solid screw (242); if the test fails, go to step S52: detaching the pressure test tool (8), separating the first pipe (1) and the second pipe (2), reinstalling or adjusting the second pipe (2), testing until the test is qualified, and executing the step S51 after the test is qualified; in the step S52, a driving element (91) is disposed between the first fixing plate (61) and the second fixing plate (71), and the driving element (91) drives the first fixing plate (61) and the second fixing plate (71) to move away from each other, so that the first pipe (1) is separated from the second pipe (2);
step S6: and filling soil back into the pit to bury the first pipe (1) and the second pipe (2).
2. The method of constructing a water supply pipe with glass fiber reinforced plastic and sand as claimed in claim 1, wherein the method comprises the steps of: in the step S1, after the pit is dug on the ground, a work pit (4) is further dug at the pit bottom, and the work pit (4) corresponds to a position right below the connection position of the first pipe (1) and the second pipe (2).
3. The method of constructing a water supply pipe with glass fiber reinforced plastic and sand as claimed in claim 1, wherein the method comprises the steps of: the step S6 further includes: before backfilling, gaps of the first pipe (1) and the second pipe (2) facing the port of the flaring section (21) of the first sealing ring (31) are sealed through filler.
4. The method of constructing a water supply pipe with glass fiber reinforced plastic and sand as claimed in claim 1, wherein the method comprises the steps of: in the step S2, when the second hoisting pipe (2) is close to the first pipe (1), the probing rod (62) is used to determine the axial relative positions of the first pipe (1) and the second pipe (2), so as to determine that the pressure test hole (23) is just located between the first sealing ring (31) and the second sealing ring (32).
5. The method of constructing a water supply pipe with glass fiber reinforced plastic and sand as claimed in claim 4, wherein: and after the step S2 is finished, the positions of the first pipe (1) and the second pipe (2) are fixed by using sand bags to be padded below the first pipe (1) and the second pipe (2).
6. The method of constructing a water supply pipe with glass fiber reinforced plastic and sand as claimed in claim 1, wherein the method comprises the steps of: pressure testing frock (8) include three way connection (81), compression pump (82), discharge valve (83), the three opening of three way connection (81) communicates with compression pump (82), discharge valve (83), through-hole (241) respectively.
7. The method of constructing a water supply pipe with glass fiber reinforced plastic and sand as claimed in claim 1, wherein the method comprises the steps of: the driving piece (91) is a spring, the elastic force direction of the spring is along the axial direction of the first pipe (1) and the second pipe (2), the driving piece (91) is distributed along the circumferential direction of the first pipe (1) and the second pipe (2) in a plurality of ways, and the quantity of the driving piece (91) is gradually increased when the driving piece (91) is installed.
8. The method of constructing a water supply pipe with glass fiber reinforced plastic and sand as claimed in claim 1, wherein the method comprises the steps of: the first fixing plate (61) is provided with a plurality of first mounting holes (611) along the circumferential direction, the second fixing plate (71) is provided with a plurality of second mounting holes (711) along the circumferential direction, and the second mounting holes (711) are opposite to the first mounting holes (611) one by one; the step S6 further includes: before backfilling, a fixing stud (92) penetrates through the first mounting hole (611) and the second mounting hole (711), and the fixing stud (92) connects the first fixing plate (61) and the second fixing plate (71) through a fixing nut (93).
9. The method of constructing a water supply pipe with glass fiber reinforced plastic and sand as claimed in claim 1, wherein the method comprises the steps of: the step S1 further includes: the water stopping ring (5) is sleeved outside the first pipe (1), the water stopping ring (5) is made of water-swelling rubber, the width of the water stopping ring (5) is smaller than the width of a gap between the outer wall of the first pipe (1) and the inner wall of the flaring section (21), the water stopping ring (5) is adhered to the end part, facing the first pipe (1) of the second pipe (2), of the sealing ring II (32) through glue, the glue is of a water-failure type, the lower part of the inner annular wall of the water stopping ring (5) is tightly attached to the outer bottom wall of the first pipe (1), and a gap is reserved between the upper part of the inner annular wall of the water stopping ring (5) and the outer top wall of the first pipe (1); and after the water stop ring (5) is completely expanded when meeting water, sealing is established between the outer wall of the pipe I (1) and the inner wall of the flaring section (21).
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| CN202010066683.6A CN111271524B (en) | 2020-01-20 | 2020-01-20 | Construction method of glass fiber reinforced plastic sand inclusion water supply pipe |
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| CN113719663A (en) * | 2021-08-31 | 2021-11-30 | 袁振宇 | Stable connecting device of hydraulic engineering pipeline |
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| CN206072567U (en) * | 2016-09-28 | 2017-04-05 | 长沙新世管道有限公司 | A kind of fiberglass sand inclusion high-voltage tube |
| CN206617699U (en) * | 2017-04-11 | 2017-11-07 | 浙江鸿道环保有限公司 | A kind of pressure testing device |
| CN107218439A (en) * | 2017-05-02 | 2017-09-29 | 广西北海跃达玻璃钢制品有限公司 | One kind is used for drip irrigation glass fiber reinforced plastic sand-inclusion pipeline installation method |
| CN207018692U (en) * | 2017-08-11 | 2018-02-16 | 昆山普拉斯克机械制造有限公司 | Bell and spigot and pipe network |
| CN108131506B (en) * | 2017-12-22 | 2019-08-13 | 云南建投第五建设有限公司 | A kind of construction method that steel pipe is connect with FRP sand tube |
| CN208074347U (en) * | 2017-12-29 | 2018-11-09 | 浙江钻荷蝶机械科技有限公司 | A kind of socket pressure testing special tooling |
| CN209622218U (en) * | 2019-03-15 | 2019-11-12 | 无锡华毅管道有限公司 | Double spigot mouth RC pipejacking |
| CN109945003B (en) * | 2019-04-02 | 2020-09-11 | 贵州省源单新材料科技有限公司 | Polyolefin drain pipe with FRD double containment detects closed water socket joint immediately |
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