CN109899609B - Concrete conveying pump pipe connection conversion structure and construction method thereof - Google Patents
Concrete conveying pump pipe connection conversion structure and construction method thereof Download PDFInfo
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- CN109899609B CN109899609B CN201910289665.1A CN201910289665A CN109899609B CN 109899609 B CN109899609 B CN 109899609B CN 201910289665 A CN201910289665 A CN 201910289665A CN 109899609 B CN109899609 B CN 109899609B
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- 239000004567 concrete Substances 0.000 title claims abstract description 78
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 47
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims description 25
- 238000005086 pumping Methods 0.000 claims description 20
- 238000012546 transfer Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 239000012943 hotmelt Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 abstract description 5
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000011372 high-strength concrete Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The utility model provides a concrete delivery pump pipe connection conversion structure and construction method thereof, includes original pump pipe and the compound pump pipe that communicates through conversion pump pipe and original pump pipe, and the conversion pump pipe is the steel pipe, and the link of one side is the buckle link, and the link of opposite side is the ring flange link, and compound pump pipe is double-deck compound pipe, including outer tube and inner tube, the outer tube is the steel pipe, and the inner tube is made by the ultrahigh molecular weight polyethylene, and the ring flange of compound pump pipe is through the ring flange bolt that runs through the flange bolt hole and ring flange bolt connection of ring flange link. The invention solves the problems that the traditional conveying pump pipe buckle cannot be directly connected with the composite pump pipe and the traditional conveying pump pipe diameter and the composite pump pipe diameter are excessive. The invention has the advantages of tight connection, excessive and smooth pipe diameter and good concrete conveying effect.
Description
Technical Field
The invention belongs to the field of concrete transportation construction, and particularly relates to a combined connection structure between different types of conveying pump pipes and a concrete pumping method thereof.
Background
The concrete pumping pipeline of the concrete structure in the construction industry is mainly made of steel pump pipes, and the steel pump pipes can generate various problems in the concrete pumping process, such as pipe blockage or concrete performance change. These problems are more common especially in ultra high-rise pumping operations due to the high pumping height and unstable performance of high strength concrete. The construction production efficiency is seriously reduced, and the quality problem is easy to occur when the treatment is not in time.
Meanwhile, the following problems are also existed in the connection method for the concrete delivery pump pipe:
1. the traditional concrete delivery pump pipe adopts the buckle connected mode, and the buckle is connected inaccurately, leaks thick liquid at buckle connected position easily in the concrete transportation process, and the delivery pressure of pump truck will lead to the pump pipe vibrations in the concrete transportation process, and the connection that is weak will lead to taking place quality and incident between the pump pipe, and flange joint is as more reliable and safe connected mode, has been adopted widely by pump pipe producer and construction unit.
2. The traditional buckle opening cannot be directly connected with the flange bolt opening of the special concrete conveying pump pipe, and great difficulty is brought in the concrete conveying pump pipe connection construction process. The conventional construction method cannot solve such a problem.
There is no method for solving the problem of connecting pump pipes in different connection modes in the prior art, so that a method for solving the problem of connecting a traditional concrete pump pipe and a special concrete pump pipe is needed at present, and convenience is brought to the connection of the pump pipes in the future.
Disclosure of Invention
The invention aims to provide a concrete conveying pump pipe connection conversion structure and a construction method thereof, which are used for solving the technical problems that a concrete steel pump pipe is blocked, the concrete performance is changed seriously, the construction production efficiency is reduced, the quality is not good easily in time treatment, the traditional fastening connection pump pipe and a concrete conveying pump pipe in a special form cannot be directly connected, the connection is not tight, slurry leakage is easy, safety accidents are easy to occur at a weak part of an interface due to the conveying pressure vibration of a pump truck, the concrete pouring quality control is difficult to guarantee and the like.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the concrete conveying pump pipe connection conversion structure comprises an original pump pipe, a composite pump pipe communicated with the original pump pipe through the conversion pump pipe, wherein the original pump pipe is a steel pipe, annular grooves for locking a buckle are formed on the outer walls of two ends of the original pump pipe,
the conversion pump pipe is a steel pipe and comprises a conversion pipe body and connecting ends at two sides, the connecting end at one side is a buckle connecting end, an annular groove for locking a buckle is also formed on the outer wall of the conversion pipe body at the buckle connecting end, the connecting end of the original pump pipe is in locking connection with the annular groove on the buckle connecting end through a buckle with a rubber gasket,
the connecting end at the other side is a flange connecting end, a steel annular flange is fixedly connected on the outer wall of the conversion pipe body of the flange connecting end in the middle, a group of flange bolt holes are uniformly spaced at the periphery of the edge part of the annular flange, the outer side surface of the annular flange is level with the end face of the flange connecting end,
the composite pump pipe is a double-layer composite pipe and comprises a composite pipe body, and further comprises annular flange plates which are respectively and fixedly connected with steel in the middle on the outer walls of the end surfaces of the two sides of the composite pipe body, a group of flange bolt holes are also formed in the circumferential direction of the edges of the annular flange plates at uniform intervals, the composite pipe body comprises an outer pipe and an inner pipe, the outer pipe is a steel pipe, the inner pipe is made of ultrahigh molecular polyethylene, the outer wall surface of the inner pipe is tightly attached to the inner wall surface of the outer pipe, the two ends of the inner pipe are reversely wrapped to the two ends of the outer pipe through hot-melt flanges, the outer side surfaces of the annular flange plates are tightly attached to the outer side surfaces of the outer pipe, the width of the flanges is based on the condition that the flange bolt holes are not covered,
the annular flange plate of the composite pump pipe is connected with the annular flange plate of the flange plate connecting end in a bolting way through a flange bolt penetrating through the flange bolt hole.
Original pump line and compound pump line are the constant cross-section pipe of internal diameter, and the internal diameter of original pump line is less than the internal diameter of compound pump line, the conversion body is the variable cross-section pipe of internal diameter even transition, and the internal diameter of buckle link equals the internal diameter of original pump line, and the internal diameter of ring flange link equals the internal diameter of compound pump line.
The flange connection end is connected with an annular steel gasket protruding outwards relative to the outer end face of the annular flange in the middle, and the inner diameter of the annular steel gasket is the same as that of the flange connection end.
The outer diameter of the annular steel gasket is not larger than the width of the flanging.
The width of the flanging is 30mm-40mm.
At least eight flange bolt holes are formed in each annular flange, and the length of the transfer pump pipe is 500-600 mm.
The inner diameter of the outer tube is 125-175 mm, the wall thickness is 4.5-5 mm, and the length of the outer tube is 3m, 2m, 1m or 0.5m;
the inner diameter of the inner tube is 100mm-150mm, the wall thickness is 8mm, and the length of the inner tube is 3m, 2m, 1m or 0.5m.
The composite pump pipe comprises a straight pipe and an elbow pipe, wherein the elbow pipe comprises four forms, the bending angles are respectively 90 degrees, 45 degrees, 30 degrees or 15 degrees, and the corresponding turning radiuses are respectively 1000mm, 750mm,500mm or 350mm.
The construction method of the concrete conveying pump pipe connection conversion structure comprises the following construction steps:
step one, processing a composite pump pipe:
A. selecting the inner diameter, the wall thickness, the length, the bent pipe angle, the turning radius and the size of the annular flange plate of the outer pipe, and welding the annular flange plate in place;
B. the inner diameter, the wall thickness, the length, the angle of the bent pipe and the size of the turning radius of the inner pipe are selected,
C. the outer pipe is directly sleeved on the outer side of the inner pipe, the inner pipe is reserved with the length of a flanging and is reversely wrapped on the outer side surface of the annular flange plate through hot melting, the flanging ensures flatness, and the flatness is not more than 1mm;
step two, processing a conversion pump pipe:
A. determining the inner diameter size of the original pump pipe and the inner diameter size of the composite pump pipe;
B. prefabricating and processing a conversion pump pipe according to the size of pump pipes at two sides to be connected, sleeving an annular flange at the connecting end of the flange, and opening an annular groove at the connecting end of the buckle;
step three, the annular groove at the buckling connection end of the conversion pump pipe and the annular groove of the original pump pipe are embedded into rubber gaskets, then the two pipes are connected through buckling connection, and the annular flange at the flange connection end of the conversion pump pipe is connected with the annular flange of the composite pump pipe in a bolting way through flange bolts;
step four, performing a concrete pouring experiment after the connection of the transfer pump pipe, and verifying the connection tightness and the firmness of the transfer pump pipe;
step five, according to the field construction requirement, selecting composite pump pipes with different lengths and bent pipe angles for field assembly; the composite pump pipes are connected through flange bolts by adopting annular flanges, so that the installation is firm, and the pipelines are ensured to be seamless and not leak slurry;
step six, concrete pumping and pouring: after the composite pump pipe is installed, pumping and pouring concrete are carried out according to regulations and standard requirements, and the concrete material performance and the pouring construction method are consistent with those of the original pump pipe;
step seven, washing the tube:
adopting a cleaning ball for air cleaning;
when the cleaning ball is used, the cleaning ball is soaked in water for more than 30 minutes in advance, after concrete pumping is finished, the cleaning ball is put into the tail end of a composite pump pipe, and the cleaning ball is reversely ejected to a feed inlet by a pneumatic pump;
and (3) observing the rising speed of concrete in the hopper during cleaning, beating the pipeline, and finishing cleaning the pipeline when the sound is changed into the cavitation sound.
In the flange connection in the second step and the third step, a spring gasket is additionally arranged between the flange bolts and the annular flange in a spaced jump point connection mode.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
the invention discloses a composite pump pipe which can completely replace a steel pump pipe, is suitable for pumping operation of low-layer and super-high-layer concrete structures, is particularly suitable for pumping operation of high-strength concrete and pumping operation of super-high layer, and has obvious superiority:
1. the ultra-high molecular weight polyethylene pipe is used as an inner pipeline, and the inner pipeline and the concrete have small friction coefficient, wear resistance, self lubrication and difficult occurrence of adhesion phenomenon and pipe blockage; reduce friction with concrete and reduce adhesion with concrete.
2. Because the ultra-high molecular weight polyethylene has smaller rigidity, the steel pipeline is used as an outer pipeline, and the integral rigidity of the pump pipe is improved. The outer pipe may be a non-standard pipe or a standard pipe.
3. The steel outer pipeline and the ultra-high molecular weight polyethylene inner pipeline are compositely formed, the inner wall is replaceable, the abrasion of the outer pipe is reduced, and the turnover rate is higher.
4. The pipelines are connected by using flanges, so that the connection between the pipes is tighter, the leakage pressure and slurry leakage are avoided, the pumping efficiency is higher, and the pumpability of the concrete is improved.
The invention also discloses a transfer pump pipe special for connecting the composite pump pipe and the original pump pipe, namely a transfer pump pipe for connecting the traditional concrete conveying pump pipe and the composite pump pipe, and a connecting method for connecting the pipe diameter and the connecting mode of the traditional concrete conveying pump pipe to the composite pump pipe through the transfer pump pipe. The traditional concrete delivery pump pipe is connected with the concrete pump truck by the aid of the buckle, one end of the conversion pump pipe is connected with the traditional delivery pump pipe by the aid of the buckle, the other end flange of the conversion pump pipe is connected with the composite pump pipe flange by the aid of the bolt, and the problems that the traditional delivery pump pipe buckle cannot be directly connected with the composite pump pipe and the traditional delivery pump pipe diameter is excessive to the composite pump pipe diameter are solved. The invention has the advantages of tight connection, excessive and smooth pipe diameter and good concrete conveying effect.
The flange bolt connection after the connection of the transfer pump pipe can better bear disturbance caused by the pressure of casting concrete. Firstly, one end of a conversion pump pipe buckle is in bayonet connection with a traditional concrete delivery pump pipe, the problem that the traditional concrete delivery pump pipe is excessively connected to a special concrete delivery pump pipe is solved, then a flange at the other end of the conversion pump pipe is in flange bolt connection with a composite pump pipe, the problem of transition from the traditional concrete delivery pump pipe to the complete composite pump pipe is solved, meanwhile, the fixing method that the buckle connection is completely connected to the flange bolt after passing through the conversion pump pipe is well solved, the quality and safety accidents of the weak connection position of pump pipe vibration caused by the pressure of pump truck delivery are reduced, the integrity of the connection of the traditional concrete delivery pump pipe and the special concrete delivery pump pipe is well guaranteed, the concrete delivery continuity is further enhanced, the construction quality of concrete delivery is guaranteed, the connection method is clear, the connection steps are clear, the application range is wide, compared with the traditional connection mode, labor is saved, the construction efficiency is improved, pumping consumption is reduced, energy is saved, and meanwhile, a good conversion connection effect is obtained.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an exploded schematic view of fig. 1.
Fig. 3 is a schematic structural view of the buckle.
Fig. 4 is a schematic structural view of a rubber gasket.
Fig. 5 is a schematic side view of the steering wheel of the transfer pump tube of fig. 1.
Fig. 6 is a schematic cross-sectional view of a composite pump tube.
Reference numerals: 1-original pump pipe, 2-conversion pump pipe, 3-composite pump pipe, 31-outer pipe, 32-inner pipe, 33-turn-ups, 4-annular groove, 5-buckle, 6-annular flange, 7-flange bolt hole, 8-annular steel gasket, 9-flange bolt, 10-spring gasket, 11-rubber gasket.
Detailed Description
Referring to fig. 1-6, a concrete delivery pump pipe connection conversion structure comprises an original pump pipe 1, wherein the original pump pipe 1 is a steel pipe, annular grooves 4 for locking buckles are formed in the outer walls of two ends of the original pump pipe 1, and the concrete delivery pump pipe connection conversion structure further comprises a conversion pump pipe 2 and a composite pump pipe 3 communicated with the original pump pipe 1 through the conversion pump pipe 2.
The switching pump line is the steel pipe, including the link of switching body and both sides, the link of one side is the buckle link, also open on the switching body outer wall of buckle link has the annular groove 4 that supplies the buckle to lock, the link of original pump line is locked in the lump with the buckle 5 that have rubber packing ring 11 through the pad with the annular groove on the buckle link and is connected.
The link of opposite side is the ring flange link, fixedly connected with steel annular flange 6 placed in the middle on the transfer pipe body outer wall of ring flange link, the limit portion circumference of annular flange evenly is spaced apart to have a set of flange bolt hole 7, the outside surface of annular flange and the terminal surface parallel and level of ring flange link.
The compound pump line is double-deck compound pipe, including the compound body, still include on the terminal surface outer wall of compound body both sides respectively fixedly connected with steel annular flange 6 placed in the middle, the even interval in limit portion circumference of this annular flange also opens there is a set of flange bolt hole 7, the compound body includes outer tube 31 and inner tube 32, outer tube 31 is the steel pipe, inner tube 32 is made by the ultrahigh molecular weight polyethylene, the inner wall surface of outer tube is hugged closely to the outer wall surface of inner tube 32, the both ends portion of inner tube is through the turn-ups 33 of hot melt to the both ends of outer tube 31, hug closely the outside surface of annular flange 6, the width of turn-ups 33 is in order not to shelter from the flange bolt hole.
The annular flange 6 of the composite pump pipe 3 is connected with the annular flange 6 of the flange connecting end in a bolting way through a flange bolt 9 penetrating through the flange bolt hole 7.
The original pump pipe 1 and the compound pump pipe are equal-section pipes with constant inner diameters, the inner diameter of the original pump pipe 1 is smaller than that of the compound pump pipe 3, the conversion pipe body is a variable-section pipe with uniform transition inner diameter, the inner diameter of the buckle connecting end is equal to that of the original pump pipe 1, and the inner diameter of the flange connecting end is equal to that of the compound pump pipe 3.
The flange connection end is connected with an annular steel gasket 8 protruding outwards relative to the outer end face of the annular flange in the middle, and the inner diameter of the annular steel gasket 8 is the same as that of the flange connection end.
The outer diameter of the annular steel gasket is not larger than the width of the flanging.
The width of the flange 33 is 30mm-40mm.
At least eight flange bolt holes 7 are formed in each annular flange plate 6, and the length of the transfer pump pipe 2 is 500-600 mm.
The inner diameter of the outer tube 31 is 125mm-175mm, the wall thickness is 4.5mm-5mm, and the length of the outer tube 31 is 3m, 2m, 1m or 0.5m;
the inner diameter of the inner tube 32 is 100mm-150mm, the wall thickness is 8mm, and the length of the inner tube 32 is 3m, 2m, 1m or 0.5m.
The composite pump pipe 3 comprises a straight pipe and an elbow pipe, wherein the elbow pipe comprises four forms, the bending angles are respectively 90 degrees, 45 degrees, 30 degrees or 15 degrees, and the corresponding turning radiuses are respectively 1000mm, 750mm,500mm or 350mm.
In the embodiment, the aperture of the flange bolt hole is 24mm in the embodiment, the diameter of the flange bolt is 22mm, the length is 120mm, and the common gasket and the spring gasket can be additionally arranged in use. The annular steel gasket has a width of 40mm, a thickness of 3mm, an inner diameter of 130mm and an outer diameter of 150mm.
The construction method of the concrete conveying pump pipe connection conversion structure comprises the following construction steps:
step one, processing a composite pump pipe:
A. selecting the inner diameter, wall thickness, length, bend angle, turning radius and size of the annular flange of the outer tube 31, and welding the annular flange in place; in the embodiment, the thickness of the annular flange plate is 20mm, the diameter is 280mm, eight flange bolt holes are arranged in total, and the aperture is 24mm. In this example, the inner diameter is 125mm.
B. The inner diameter, wall thickness, length, bend angle, and turning radius of the inner tube 32 are selected, and in this embodiment, the inner diameter is 125mm.
C. In this embodiment, the outer diameter of the inner tube is smaller than the inner diameter of the outer tube by 9mm, the outer tube 31 is directly sleeved on the outer side of the inner tube 32, a gap of 4.5mm is formed around the inner tube, the inner tube 32 is reserved with the length of a flange 33 and is wrapped on the outer side surface of the annular flange 6 in a reverse mode through hot melting, the flange is ensured to be smooth, and the flatness is not more than 1mm.
During manufacturing, the diameters and the wall thicknesses of the inner pipe and the outer pipe are ensured to meet the pumping requirement, the temperature during flanging of the inner pipe is controlled to be about 80 degrees, the flanging is smooth and flat, the positions of the bolt holes of the flange plate are accurate, and the distribution is uniform. The transfer pump pipe is firmly welded, and the surface defects such as incomplete welding, air holes, weld flash, cracks and the like on the surface of the welding line are not required, and the welding line meets the standard requirement. The outer tube should be accurate in manufacturing size and not leak slurry.
Step two, processing a conversion pump pipe:
the discharge hole of the ground pump equipment and the feed inlet of the distributor are original pump pipes, namely the common buckle type steel pump pipe connector, the inner diameter is 130mm, and the composite pump pipe is connected in a flange type, and the inner diameter is 125mm. Both pipe diameters and the connection modes are different, so that the adapter needs to be machined to connect the two pipes.
A. Determining the inner diameter size of the original pump pipe 1 and the inner diameter size of the composite pump pipe 3;
B. and (3) prefabricating and processing the conversion pump pipe according to the size of the pump pipes at the two sides to be connected, sleeving an annular flange 6 at the connecting end of the flange, and opening the annular groove 4 at the connecting end of the buckle.
Step three, the annular groove 4 of the buckle connecting end of the conversion pump pipe and the annular groove 4 of the original pump pipe are embedded into the rubber gasket 11, then the two pipes are connected through the buckle 5, and the annular flange plate of the flange plate connecting end of the conversion pump pipe 2 is connected with the annular flange plate 6 of the composite pump pipe 3 in a bolting way through the flange bolts 9.
And fourthly, performing a concrete pouring experiment after the transfer pump pipe 2 is connected, and verifying the tightness and the firmness of the connection.
Step five, according to the field construction requirement, selecting the composite pump pipes 3 with different lengths and bent pipe angles for field assembly; the composite pump pipes are connected through the annular flange 6 through the flange bolts 9, so that the installation is firm, and no gap and no slurry leakage of the pipeline are ensured.
The reinforcing measure of the composite pump pipe is not too different from that of the common pump pipe, after the pipeline is installed, the straight section and the vertical section are fixed by adopting a fastener type steel pipe frame, and the concrete pier is adopted for fixing at the turning part and the position with larger impact force. And plugging the periphery of the reserved hole of the floor slab by using a wood square.
Step six, concrete pumping and pouring: after the composite pump pipe 3 is installed, pumping and pouring concrete are carried out according to regulations and standard requirements, and the performance of concrete materials and a pouring construction method are consistent with those of the original pump pipe.
Step seven, washing the tube:
adopting a cleaning ball for air cleaning;
when the cleaning ball is used, the cleaning ball is soaked in water for more than 30 minutes in advance, after concrete pumping is finished, the cleaning ball is placed at the tail end of the composite pump pipe, and the cleaning ball is reversely ejected to the feed inlet by the pneumatic pump.
And (3) observing the rising speed of concrete in the hopper during cleaning, beating the pipeline, and finishing cleaning the pipeline when the sound is changed into the cavitation sound.
In the flange connection in the second step and the third step, a spring gasket 10 is additionally arranged between the flange bolts 9 and the annular flange 6 in a spaced jump point connection mode.
The waste water from the pipe washing of the invention should be reused after secondary precipitation; the concrete should be calculated accurately before application, and the use of cleaning out the remaining concrete should be considered. After the inner wall of the inner tube is worn to a certain extent, the inner tube needs to be replaced, and the replaced inner core can be reprocessed after being decomposed and reused, so that the inner tube is environment-friendly.
Claims (10)
1. The utility model provides a concrete delivery pump pipe connection conversion structure, includes original pump line (1), original pump line (1) are the steel pipe, open on the both ends outer wall of original pump line (1) have annular groove (4) that supply buckle locking, its characterized in that: also comprises a conversion pump pipe (2) and a compound pump pipe (3) communicated with the original pump pipe (1) through the conversion pump pipe (2),
the conversion pump pipe is a steel pipe and comprises a conversion pipe body and connecting ends at two sides, the connecting end at one side is a buckle connecting end, an annular groove (4) for locking a buckle is also formed on the outer wall of the conversion pipe body at the buckle connecting end, the connecting end of the original pump pipe is in locking connection with the annular groove on the buckle connecting end through a buckle (5) filled with a rubber gasket (11),
the connecting end at the other side is a flange connecting end, a steel annular flange (6) is fixedly connected with the outer wall of the conversion pipe body of the flange connecting end in the middle, a group of flange bolt holes (7) are uniformly spaced at the periphery of the edge of the annular flange, the outer side surface of the annular flange is level with the end face of the flange connecting end,
the composite pump pipe is a double-layer composite pipe and comprises a composite pipe body, and further comprises annular flange plates (6) which are respectively and fixedly connected with steel on the outer walls of the end faces at two sides of the composite pipe body in a centering manner, a group of flange bolt holes (7) are formed in the periphery of the edges of the annular flange plates at equal intervals, the composite pipe body comprises an outer pipe (31) and an inner pipe (32), the outer pipe (31) is a steel pipe, the inner pipe (32) is made of ultrahigh molecular polyethylene, the outer wall surface of the inner pipe (32) is tightly attached to the inner wall surface of the outer pipe, the two ends of the inner pipe are reversely wrapped to the two ends of the outer pipe (31) through hot-melt flanging (33) and tightly attached to the outer side surface of the annular flange plates (6), the width of the flanging (33) is based on the condition that the flange bolt holes are not shielded,
the annular flange (6) of the compound pump pipe (3) is connected with the annular flange (6) at the connecting end of the flange in a bolting way through a flange bolt (9) penetrating through the flange bolt hole (7).
2. The concrete pump line connection switching structure according to claim 1, wherein: original pump line (1) and compound pump line are the constant cross-section pipe of internal diameter, and the internal diameter of original pump line (1) is less than the internal diameter of compound pump line (3), the conversion body is the variable cross-section pipe of the even transition of internal diameter, and the internal diameter of buckle link equals the internal diameter of original pump line (1), and the internal diameter of ring flange link equals the internal diameter of compound pump line (3).
3. The concrete pump line connection switching structure according to claim 1, wherein: the flange connection end is connected with an annular steel gasket (8) protruding outwards relative to the outer end face of the annular flange in the middle, and the inner diameter of the annular steel gasket (8) is the same as the inner diameter of the flange connection end.
4. A concrete pump line connection switching structure according to claim 3, wherein: the outer diameter of the annular steel gasket is not larger than the width of the flanging.
5. The concrete pump line connection switching structure according to claim 1 or 4, wherein: the width of the flanging (33) is 30mm-40mm.
6. The concrete pump line connection switching structure according to claim 1, wherein: at least eight flange bolt holes (7) are formed in each annular flange plate (6), and the length of the transfer pump pipe (2) is 500-600 mm.
7. The concrete pump line connection switching structure according to claim 1, wherein:
the inner diameter of the outer tube (31) is 125-175 mm, the wall thickness is 4.5-5 mm, and the length of the outer tube (31) is 3m, 2m, 1m or 0.5m;
the inner diameter of the inner tube (32) is 100mm-150mm, the wall thickness is 8mm, and the length of the inner tube (32) is 3m, 2m, 1m or 0.5m.
8. The concrete pump line connection switching structure according to claim 7, wherein: the composite pump pipe (3) comprises a straight pipe and an elbow pipe, wherein the elbow pipe comprises four forms, the bending angles are respectively 90 degrees, 45 degrees, 30 degrees or 15 degrees, and the corresponding turning radiuses are respectively 1000mm, 750mm,500mm or 350mm.
9. A construction method of a concrete pump pipe connection switching structure according to any one of claims 1 to 8, characterized by comprising the following construction steps:
step one, processing a composite pump pipe:
A. selecting the inner diameter, the wall thickness, the length, the bent pipe angle, the turning radius and the size of the annular flange of the outer tube (31), and welding the annular flange in place;
B. the inner diameter, the wall thickness, the length, the angle of the bent pipe and the size of the turning radius of the inner pipe (32) are selected,
C. the outer pipe (31) is directly sleeved on the outer side of the inner pipe (32), the inner pipe (32) is reserved with the length of a flanging (33) and is reversely wrapped on the outer side surface of the annular flange (6) through hot melting, and the flanging ensures flatness, and the flatness is not more than 1mm;
step two, processing a conversion pump pipe:
A. determining the inner diameter size of an original pump pipe (1) and the inner diameter size of a composite pump pipe (3);
B. prefabricating and processing a conversion pump pipe according to the size of pump pipes at two sides to be connected, sleeving an annular flange (6) at the connecting end of the flange, and opening an annular groove (4) at the connecting end of a buckle;
step three, the annular groove (4) at the connecting end of the conversion pump pipe and the annular groove (4) of the original pump pipe are embedded into the rubber gasket (11), then the two pipes are connected through the buckle (5), and the annular flange at the connecting end of the flange of the conversion pump pipe (2) is connected with the annular flange (6) of the composite pump pipe (3) through the bolting of the flange bolt (9);
step four, after the transfer pump pipe (2) is connected, performing a concrete pouring experiment, and verifying the connection tightness and firmness of the transfer pump pipe;
step five, selecting composite pump pipes (3) with different lengths and bent pipe angles for field assembly according to field construction requirements; the composite pump pipes are connected through annular flange plates (6) through flange bolts (9), so that the installation is firm, and no gap and no slurry leakage of the pipeline are ensured;
step six, concrete pumping and pouring: after the composite pump pipe (3) is installed, pumping and pouring concrete are carried out according to regulations and standard requirements, and the performance of concrete materials and a pouring construction method are consistent with those of the original pump pipe;
step seven, washing the tube:
adopting a cleaning ball for air cleaning;
when the cleaning ball is used, the cleaning ball is soaked in water for more than 30 minutes in advance, after concrete pumping is finished, the cleaning ball is put into the tail end of a composite pump pipe, and the cleaning ball is reversely ejected to a feed inlet by a pneumatic pump;
and (3) observing the rising speed of concrete in the hopper during cleaning, beating the pipeline, and finishing cleaning the pipeline when the sound is changed into the cavitation sound.
10. The construction method of the concrete pump pipe connection switching structure according to claim 9, characterized by:
in the flange connection in the second step and the third step, a spring gasket (10) is additionally arranged between the flange bolts (9) and the annular flange (6) in a spaced jump point connection mode.
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