CN208364940U - Small diameter tube plastic drain-pipe jacking construction equipment - Google Patents

Abstract

The utility model relates to a kind of small diameter tube plastic drain-pipe jacking construction equipments, dedicated for the plastic drainage pipeline jacking construction of 300~700mm of caliber.Mainly it is made of push-bench, push-bench console, conduit, head, casing, pulp feeding system, dreg removing system.Push-bench is equipped with jacking direction system for automatically correcting, head is driven using hydraulic motor, head front end connecting conduit, rear end connecting sleeve, head is the slurry-water balance type gone out before mud is laggard, and head cuts native jacking along the track that conduit drills out, and casing heads into soil with the track of head, casing is replaced using plastic drain-pipe again, plastic drain-pipe stays in soil.For hydraulic motor as power, driving force small in size is big；Mud reduces the space occupied in driving storehouse and casing, slurry transportation structure greatly simplifies, and is conducive to the realization of small diameter tube pipe jacking equipment using laggard preceding mode out；By the way of plastic tube displacement casing, overcoming plastic drain-pipe may not apply to the defect of jacking construction.

Description

Small diameter tube plastic drain-pipe jacking construction equipment

Technical field

The utility model relates to a kind of small diameter tube plastic drain-pipe jacking construction equipments, belong to drainage system and mechanical equipment Manufacturing field, in particular to the non-excavating construction equipment of small diameter tube drainage pipeline.

Background technique

Municipal drainage is divided into rainwater and sewage, and run-off system is divided into separate system and two kinds of combined system, and most cities are all Separate system is taken, i.e. rainwater, sewage discharges respectively.Open cut is usually used in the drainage pipeline at urban construction initial stage, rain sewage diversion Trench backfill is built road again after pipeline laying by construction.There are many more city, urban construction initial stage due to fund etc. because Element uses drainage system system, i.e. rain sewage interflow is directly discharged into river.With urban development, environmental protection consciousness it is strong Change, sewage need to can just be discharged into river after sewage treatment plant's processing is up to standard, these combined sewerage pipelines need to carry out rain dirt point Stream transformation, original collecting fitting caliber is larger, is reserved for storm sewer, creates sewage and retains pipeline, will be discharged into collecting fitting originally Sewage retained from source, then sewage treatment plant is discharged by trunk sewer.Drainage pipeline is transformed in completed region of the city, needs brokenly Except road, groove is backfilled after being laid with pipeline, restores road surface, project cost is high, influences the road traffic in city.Jacking construction is row The common construction method of waterpipe is not required to large area and breaks road, it is only necessary in the position of inspection shaft, upper pipe working well and received well are set, It is smaller to ground traffic impact.

State of the art drainage pipeline jacking construction mainly has earth pressure balance method and mud and water balance method, earth pressure balance method master It applies in big-diameter pipeline, people can enter pipe operations area and be unearthed.Pipeline less than or equal to 1500mm is mainly flat using muddy water Weighing apparatus method, in push pipe pipeline front end, the head rotating of installation cuts soil, makes soil pressure by the mud between indentation head front end and the soil body The soil of dynamic balance, the jack pushing tow pipeline of active well, head cutting is discharged with mud, and pipeline is pushed up section by section to received well.Muddy water Balancing method pipe jacking construction technique is mature, and construction precision is high, but minimum pipe can only jacking diameter 800mm pipeline.

The secondary branch pipe network management diameter majority of wastewater interception pipe is 300~600mm, and quantity is most in cutting dirty pipe network, because caliber compared with It is small to use Sludge-liquid balance method in pipe-jacking construction.There are also a kind of secondary push bench processes for the prior art, can be arranged with 300~600mm of jacking Waterpipe.Its method is the guide rod of a first piece diameter 100mm of jacking, and guide rod rear end passes through a cone connection installation diameter 200 The unearthed pipe of~250mm, the pipe that is unearthed are pushed up to received well section by section, are packed into spiral of being unearthed in the pipe that is unearthed, and be unearthed pipe rear end fitting machine Head, head cut soil and are sent forward by spiral of being unearthed to received well.Reinforced concrete pipiline is installed, use is very heavy behind head Pipeline is pushed up section by section to received well on top.Push pipe head is by pipeline transmitting top power, when encountering complicated geology, it sometimes appear that being machine Head does not push up received well, and the pipe wall fracture phenomena of rear end haves no alternative but excavate taking-up head in Handpiece Location；Leading portion resistance mistake Greatly, pushing tow may also result in pipeline protuberance；Unearthed spiral often occur can not be sent out by earth accumulation, cause head load super It carries.

The prior art also has the practice using the mud water balance push bench crown into small diameter tube drainpipe, but caliber is smaller, especially It is effective most 300mm, 400mm pipelines of sewage, drum diameter also very little, deviation correcting device can not be arranged in head, only It can be according to the prior push pipe gradient of setting without correction jacking, it is easy to deviation occur beyond the phenomenon that requiring.Mud water balance push bench Fixation mud flow inlet and scum pipe, it is complicated with the rotating blade muddy water storehouse connection structure of head, in the head of narrow space It is inside difficult to realize, also limits the use of small diameter tube mud water balance push bench.

Drainage pipeline push pipe is all to use armored concrete tubing, and have higher intensity requirement to tubing at present, has been protected Demonstrate,prove the transmitting that power is pushed up in pipeline jack-in process.High-density polyethylene plastics drainage pipe, since inner wall smooth frictional resistance is small, interface It the advantages that tight non-leakage, corrosion resistance and good, is widely used in drainage pipeline project.Especially caliber 600mm is below Small diameter tube is used widely in sewage conduct.Plastic drain-pipe is embedded in underground, and the ring stiffness of itself can satisfy top The requirement of load, but plastic drain-pipe is unable to satisfy the requirement of powerful top power as push pipe tubing, constrains plastic drain pipe The application in dirty harnessing project is cut in the transformation of old city drainage pipeline, sewage.If making the plastic draining that can transmit top power Pipe, it is necessary to which the wall thickness for increasing tubing increases the material such as steel of longitudinal stress, to meet the transmitting of top power, considerably increases The cost of tubing, therefore, plastic drain-pipe push pipe are difficult to apply in practical projects.

Summary of the invention

The purpose of this utility model is: a kind of small diameter tube plastic drain-pipe jacking construction equipment is provided, dedicated for caliber The plastic drainage pipeline jacking construction of 300~700mm.Mainly by push-bench, push-bench console, conduit, head, casing, confession Slurry system, dreg removing system composition.Push-bench is equipped with jacking direction system for automatically correcting, and head is driven using hydraulic motor, head Front end connecting conduit, rear end connecting sleeve, by the way of head uses slurry-water balance type system, mud to go out before laggard；Head Native jacking is cut along the track that conduit drills out, casing heads into soil with the track of head.Casing passes through between active well and received well After logical, by plastic drain-pipe threading, casing is extracted using substitute mode, plastic drain-pipe stays in soil, then to modeling Expect slip casting on the outside of drainpipe, slurry is full of between pipeline outer wall and the soil body.Beneficial effect is: using hydraulic motor as power, Driving force small in size is big, without electrical equipment in head, is conducive to safety；Mud using mode is gone out before laggard, reduce driving storehouse and The space occupied in casing is axially connect, so that the mud of fixed mud tube and rotation using coaxial with muddy water storehouse into grout outlet Sump connection structure greatly simplifies, and is conducive to the realization of small diameter tube pipe jacking equipment；By the way of plastic tube displacement casing, plastics Drainpipe, which heads into casing only, needs the top power of very little, and the ring stiffness of plastic drain-pipe can undertake conduit upper and week after casing extraction Soil pressure load is enclosed, overcoming plastic drain-pipe may not apply to the defect of jacking construction.

The utility model is realized by the following technologies: small diameter tube plastic drain-pipe jacking construction equipment, mainly by pushing up Pipe machine 1, push-bench console 2, conduit 3, head 4, casing 5, pulp feeding system 6, dreg removing system 7 form.The push-bench 1 fills There is jacking direction system for automatically correcting, conduit 3 is hollow circular-tube construction, and push-bench 1 passes through 3 front end light of conduit using laser guide Target automatically controls jacking direction.The head 4 is slurry-water balance type, mainly by piggyback pod 41, hydraulic motor 42, cutterhead 43, mud entrance 44, slurry outlet 45 form, and piggyback pod 41 is cylindrical shape, with push pipe direction of advance, in 41 front end of piggyback pod It feels at ease and fills hydraulic motor 42, the fuel feed pump 8 and oil return pipe 9 of hydraulic motor 42 are connect with the high-pressure oil pump of push-bench console 2, liquid The power that pressure oil drives as hydraulic motor 42.The drive shaft 46 of hydraulic motor 42 is hollow structure, and there is a perforation at center Circular hole is the channel of slurry transportation, and the rear end of drive shaft 46 is connect with mud entrance 44 using rotational slide, before drive shaft 46 End connection cutterhead 43, mud entrance 44 are fixed on 42 shell of hydraulic motor, and drive shaft 46 rotates and mud entrance 44 does not turn, rotation Turn the place of being slidably connected and be equipped with sealing ring, mud can be transported to cutterhead 43 from mud entrance 44 by drive shaft 46.Cutterhead 43 Outer diameter is consistent with 41 outer diameter of piggyback pod, and rear end is connect with the drive shaft 46 of hydraulic motor 42, and 43 front end top surface of cutterhead tapers slightly, The hollow muddy water storehouse 47 of 43 Inner Constitution of cutterhead, the position of respective drive 46 is equipped with mud guiding plate 48, mud in muddy water storehouse 47 Enter muddy water storehouse 47 from the surrounding of mud guiding plate 48 by the centre bore of drive shaft 46, avoids mud straight from the centre bore of drive shaft 46 Run in slurry outlet 45.The front end of cutterhead 43 is arranged in slurry outlet 45, and 45 front end of slurry outlet is equipped with rotary joint 49, rotation The front end connecting conduit 3 of adapter 49, the centre bore of conduit 3 is mud passing away, when cutterhead 43 rotates, slurry outlet 45 with Rotation, rotary joint 49 and conduit 3 do not turn, and the front end top surface of cutterhead 43, which is equipped with, cuts native knife 50 and slag input hole 51, piggyback pod 41 Rear end is connect with casing 5 using tapered thread.

The casing 5 is outer diameter steel round tube identical with 41 outer diameter of piggyback pod, 1.0~2.0m of every section length, casing 5 Using being threadedly coupled between the piggyback pod 41 of front end and 5 section of casing and section, screw thread is tapered thread, the internal diameter ratio of casing 5 Big 20~the 50mm of plastic draining pipe outside diameter of jacking.

The pulp feeding system 6 and dreg removing system 7 constitute the slurry-water balance type system and the unearthed system of push pipe of head 4, adopt With laggard preceding mode out.Pulp feeding system 6 includes mud pit 10, slush pump 11, flow inlet 12, the flow inlet 12 in piggyback pod 41 It is connect with mud entrance 44, dreg removing system 7 includes conduit 3, pressure-regulating valve 13, slag bucket 14, scum pipe 15, deslagging pump 16, sinks Slag bath 17.The mud of mud pit 10 injects hydraulic motor 42 by flow inlet 12, mud entrance 44 using slush pump 11, from hydraulic The centre bore of the drive shaft 46 of motor 42 enters the muddy water storehouse 47 of cutterhead 43, is uniformly filled in muddy water storehouse under the action of mud guiding plate 48 47, mud pressure comes balancing earth pressure power and groundwater pressure, and the soil that 43 rotary cutting soil knife 50 of cutterhead is cut passes through slag input hole 51 enter muddy water storehouse 47, mix with mud and drain into slag bucket 14 by slurry outlet 45, conduit 3, pressure-regulating valve 13, and pressure is adjusted Valve 13 is used to adjust the mud and water balance pressure in muddy water storehouse 47, and the mud containing silt impurity uses 16 row of deslagging pump by scum pipe 15 It is precipitated to detritus tank 17, the body refuse precipitating containing aggregate chips, upper layer mud is reused.

Mono- section of fuel feed pump 8 and 9 10~20m of length of oil return pipe, the two sides of interface are each provided with valve.Described 12 10~20m of length of flow inlet, mono- section, the two sides of interface are each provided with valve.Every jacking casing joint 5 need to lay down fuel feed pump 8 With oil return pipe 9 and flow inlet 12, it is packed into new casing joint 5, the effect of valve is to dismantle fuel feed pump 8 and oil return pipe 9 and for slurry When pipe 12, the valve at down interface both ends reduces the loss of medium.

The push pipe equipment jacking plastic draining pipe construction of the utility model, using with jacking direction system for automatically correcting Push-bench first pushes up conduit, then cuts native jacking along the track of conduit using mud water balance push bench head, and mud is pumped into from active well, mud The slurry native slag lower with cutting mix after to preceding, arranged by conduit to received well, be that a kind of laggard preceding mud and water balance out of mud is secondary Push bench process.Back-end of machine head connects steel casing, and heading into soil body transmitting top power is steel casing, and casing jacking is completed, then will be special With Grouting Pipe plastic drain-pipe push-in casing in, with plastic drain-pipe displacement steel casing, steel casing is a week Turn the equipment reused.The internal diameter of casing is bigger than the outer diameter of plastic drain-pipe, between there are gap, plastic drain-pipe only needs The frictional resistance between casing is overcome to head into, top power is relatively small.To the seam on the outside of plastic drain-pipe while casing is replaced Gap slip casting, slurry are full of between plastic tube and the soil body, and plastic pipe need to only meet the ring stiffness of buried depth.

Detailed description of the invention

Fig. 1 is the utility model conduit vertical section；

Fig. 2 is head vertical section；

Fig. 3 is cutterhead front end face figure；

Fig. 4 casing vertical section.

In figure: 1- push-bench, 2- push-bench console, 3- conduit, 4- head, 5- casing, 6- pulp feeding system, 7- deslagging system System, 8- fuel feed pump, 9- oil return pipe, 10- mud pit, 11- slush pump, 12- flow inlet, 13- pressure-regulating valve, 14- slag bucket, 15- Scum pipe, 16- deslagging pump, 17- detritus tank, 31- centre bore, 32- conduit external screw thread, 33- conduit internal screw thread, 41- piggyback pod, 42- hydraulic motor, 43- cutterhead, 44- mud entrance, 45- slurry outlet, 46- drive shaft, 47- muddy water storehouse, 48- mud guiding plate, 49- Rotary joint, 50- cut native knife, 51- slag input hole, 52- sleeve external thread, 53- casing internal screw thread.

Specific embodiment

The push pipe equipment of the utility model is that the secondary push bench process plastic drain-pipe of mud and water balance is special out before a kind of mud is laggard Use equipment.Mainly it is made of push-bench 1, push-bench console 2, conduit 3, head 4, casing 5, pulp feeding system 6, dreg removing system 7. Push-bench 1 be equipped with jacking direction system for automatically correcting, conduit 3 be hollow circular-tube construct, conduit 3 use steel, for diameter 80~ There is the centre bore 31 of a perforation at the Hollow circular beam of 100mm, center, and 31 diameter phi=40 of centre bore~60mm, 3 one section of conduit is long 1.0~2.0m is spent, internode is connected using tapered thread, and one end of conduit 3 is conduit external screw thread 32, and the other end is conduit internal screw thread 33, the taper of screw thread is 10~20:1, and tapered thread has docking convenient, and self-tightening sealing is good, and 3 profilograph of conduit is shown in Fig. 1. Push-bench 1 automatically controls jacking direction by 3 front end light target of conduit using laser guide.Head 4 is slurry-water balance type, head 4 vertical profiles meet personally Fig. 2.It is mainly made of piggyback pod 41, hydraulic motor 42, cutterhead 43, mud entrance 44, slurry outlet 45, power Cabin 41 is cylindrical shape, using steel.With push pipe direction of advance, hydraulic motor 42, hydraulic horse are installed in 41 front end center of piggyback pod Gear type low speed hydraulic motor is used up to 42, axial-piston hydraulic motor, the main spy of low speed hydraulic motor can also be used Point is small in size, and output torque is big, and not having to retarder can direct output torque.The fuel feed pump 8 and oil return pipe 9 of hydraulic motor 42 with The high-pressure oil pump of push-bench console 2 connects, the power that hydraulic oil drives as hydraulic motor 42.

The drive shaft 46 of hydraulic motor 42 is the output shaft of rotary power, the jacking force of front end cutterhead 43 is undertaken, in liquid 46 both ends of drive shaft of pressure motor 42 are equipped with thrust roller bearing, for bearing axial load.Drive shaft 46 is hollow structure, There is the circular hole of a perforation at center, is the channel of slurry transportation, and drive shaft 46 is connect using rotational slide with mud entrance 44, driven The other end of moving axis 46 connects cutterhead 43, and mud entrance 44 is fixed on 42 shell of hydraulic motor, and drive shaft 46 rotates and mud Entrance 44 does not turn, and rotational slide junction is equipped with sealing ring, and mud can be transported to knife from mud entrance 44 by drive shaft 46 Disk 43.The outer diameter of cutterhead 43 is consistent with 41 outer diameter of piggyback pod, and rear end is connect with the drive shaft 46 of hydraulic motor 42,43 front end of cutterhead Top surface tapers slightly, the hollow muddy water storehouse 47 of 43 Inner Constitution of cutterhead, and the position of respective drive 46 is equipped in muddy water storehouse 47 Mud guiding plate 48, mud enter muddy water storehouse 47 from the surrounding of mud guiding plate 48 by the circular hole at 46 center of drive shaft, avoid mud from drive The circular hole of moving axis 46 is immediately discharged to slurry outlet 45.The front end of cutterhead 43 is arranged in slurry outlet 45, and 45 front end of slurry outlet is set There is rotary joint 49, junction is equipped with sealing ring, the front end connecting conduit 3 of rotary joint 49, and the centre bore 31 of conduit 3 is mud Passing away, when cutterhead 43 rotates, slurry outlet 45 is rotated with, and rotary joint 49 and conduit 3 do not turn.It pushes up the front end of cutterhead 43 Face is equipped with and cuts native knife 50 and slag input hole 51, cuts native knife 50 and 51 circumferential direction of slag input hole is evenly arranged on the front end face of cutterhead 43.It cuts Native knife 50 is made of steel alloy, is welded on the front end face of cutterhead 43, and the width (rectangular opening) or diameter in slag input hole 51 are (round Hole) should not exceed conduit 3 centre bore 31 2/3, with guarantee cutting rock ballast will not obstruction conduit 3 centre bore 31.Cutterhead 43 front end face figures are shown in Fig. 3.

41 rear end of piggyback pod is connect with casing 5, and casing 5 is outer diameter steel round tube identical with 41 outer diameter of piggyback pod, every section 1.0~2.0m of length, using being threadedly coupled between casing 5 and the piggyback pod 41 of front end and 5 section of casing and section, screw thread is taper The internal diameter D of screw thread, casing 5 is 20~50mm bigger than the plastic draining pipe outside diameter of jacking.One end of casing 5 is sleeve external thread 52, The characteristics of other end is casing internal screw thread 53, and the taper of screw thread is 10~20:1, tapered thread is convenient for abutting joint.Casing 5 It is rolled using steel plate, 10~20mm of steel plate thickness, steel use structural carbon steel, and inner and outer welding is welded using V-butt, casing 5 Vertical profile meets personally Fig. 4.

The slurry-water balance type system and the unearthed system of push pipe, use of pulp feeding system 6 and the composition head 4 of dreg removing system 7 are laggard It is preceding go out mode, compared with the mud and water balance mud system of the prior art, mud using mode is gone out before laggard, reduce driving storehouse and The space occupied in casing is axially connect, so that the mud of fixed mud tube and rotation using coaxial with muddy water storehouse into grout outlet Sump connection structure greatly simplifies, and is conducive to the realization of small diameter tube pipe jacking equipment.Pulp feeding system 6 includes mud pit 10, slush pump 11, flow inlet 12, flow inlet 12 is connect with mud entrance 44 in piggyback pod 41, and dreg removing system 7 includes conduit 3, pressure adjusting Valve 13, slag bucket 14, scum pipe 15, deslagging pump 16, detritus tank 17.The mud of stock tank 10 using slush pump 11 by flow inlet 12, Mud entrance 44 injects hydraulic motor 42, and the muddy water storehouse of cutterhead 43 is entered from the circular hole at 46 center of drive shaft of hydraulic motor 42 47, muddy water storehouse 47 is uniformly filled under the action of mud guiding plate 48, mud pressure comes balancing earth pressure power and groundwater pressure, cutterhead 43 The soil that rotary cutting soil knife 50 is cut enters muddy water storehouse 47 by slag input hole 51, and the specific gravity of mud is larger, and rock ballast is suspended in mud In slurry, is mixed with mud and slag bucket 14 is drained by slurry outlet 45, conduit 3, pressure-regulating valve 13, pressure-regulating valve 13 is for adjusting Save the mud and water balance pressure in muddy water storehouse 47.Mud containing silt impurity drains into detritus tank 17 using deslagging pump 16 by scum pipe 15 Precipitating, the body refuse precipitating containing aggregate chips, upper layer mud are reused.

Mono- section of fuel feed pump 8 and 9 10~20m of length of oil return pipe, using braided steel wire rubber high-pressure oil pipe or steel wire winding rubber The two sides of glue high-pressure oil pipe, interface are each provided with valve.The mud tube of the heavy caliber mud water balance push bench of the prior art, one As using diameter 100mm or so steel pipe, connector is using the connection of clip cushion rubber, and length is consistent with a section push pipe tubing, a section pipe It after road top is complete, when a new length of tubing is installed, needs to lay down flow inlet and scum pipe, increases a section flow inlet and sludge pipe, then Connector is connected, needs to install four connectors.The utility model is using laggard preceding mode out, only one interior flow inlet of pipeline 12.Since the cutterhead 43 of small diameter tube push pipe is smaller, muddy water storehouse 47 is also smaller, and required stock volume is also less, and the utility model uses The high-pressure hose of DN50 is flexible convenient for connection installation as flow inlet, and it is poly- that fiber reinforced nylon hose, steel wire reinforcement can be used Urethane hose, steel wire reinforcement nylon hose etc..12 10~20m of length of flow inlet, mono- section, dismantles only one mouth, and the two of interface Side is each provided with valve.Every jacking casing joint 5 need to lay down fuel feed pump 8 and oil return pipe 9 and flow inlet 12, be packed into a new section set Pipe 5, when the effect of valve is disassembly fuel feed pump 8 and oil return pipe 9 and flow inlet 12, the valve at down interface both ends reduces medium Loss.Fuel feed pump and oil return pipe 9 and flow inlet are arranged to 10~20m, mono- section, when just having started jacking and having extended pipeline, grow Pipeline more than needed, which is folded, to be placed in active well, does not have to frequently increase tube coupling.

The push pipe equipment jacking plastic draining pipe construction of the utility model, using with jacking direction system for automatically correcting Push-bench first pushes up conduit, then cuts native jacking along the track of conduit using mud water balance push bench head, and mud is pumped into from active well, mud The slurry native slag lower with cutting mix after to preceding, arranged by conduit to received well, be that a kind of laggard preceding mud and water balance out of mud is secondary Push bench process.Back-end of machine head connects steel casing, and heading into soil body transmitting top power is steel casing, and casing jacking is completed, then will be special With Grouting Pipe plastic drain-pipe push-in casing in, with plastic drain-pipe displacement steel casing, steel casing is a week Turn the equipment reused.The internal diameter of casing is bigger than the outer diameter of plastic drain-pipe, between there are gap, plastic drain-pipe only needs The frictional resistance between casing is overcome to head into, top power is relatively small.When displacement, in the side of active well, plastic drain-pipe End is fixed on tube head using cable wire, and cable wire is worn out of plastic drain-pipe to received well, is anchored on the well rear wall of received well Cable wire is simultaneously tensioned.In active well side, pull head is installed on casing, is pulled out casing from soil using jack, plastic drain-pipe It is locked by cable wire, will not be mobile with casing, casing is drawn out section by section.To the gap on the outside of plastic drain-pipe while casing is replaced Slip casting, slurry are full of between plastic tube and the soil body, come to nothing between the soil body on the outside of pipeline caused by preventing in jack-in process, cause ground Face sinks or pipe sedimentation.

Present utility model application file and the described construction of attached drawing are only one embodiment, change construction anyway, As long as going out the mud water balance push bench head of mode and the small diameter tube push pipe equipment using casing displacement before mud is laggard, all at this The protection scope of application.

Claims (5)

1. a kind of small diameter tube plastic drain-pipe jacking construction equipment, mainly by push-bench (1), push-bench console (2), conduit (3), head (4), casing (5), pulp feeding system (6), dreg removing system (7) composition, it is characterized in that: the push-bench (1) is equipped with Jacking direction system for automatically correcting, conduit (3) are hollow circular-tube construction, and push-bench (1) is passed through before conduit (3) using laser guide Light target is held to automatically control jacking direction；The head (4) is slurry-water balance type, mainly by piggyback pod (41), hydraulic motor (42), cutterhead (43), mud entrance (44), slurry outlet (45) composition, piggyback pod (41) is cylindrical shape, with push pipe advance side To, piggyback pod (41) front end center install hydraulic motor (42), the fuel feed pump (8) and oil return pipe (9) of hydraulic motor (42) and The high-pressure oil pump of push-bench console (2) connects, the power that hydraulic oil drives as hydraulic motor (42)；Hydraulic motor (42) Drive shaft (46) is hollow structure, and it is the channel of slurry transportation that, which there is the circular hole of a perforation at center, the rear end of drive shaft (46) with Mud entrance (44) is connected using rotational slide, and the front end of drive shaft (46) connects cutterhead (43), and mud entrance (44) is fixed on On hydraulic motor (42) shell, drive shaft (46) rotates and mud entrance (44) does not turn, and rotational slide junction is equipped with sealing ring, Mud can be transported to cutterhead (43) from mud entrance (44) by drive shaft (46)；The outer diameter of cutterhead (43) and piggyback pod (41) Outer diameter is consistent, and rear end is connect with the drive shaft (46) of hydraulic motor (42), and cutterhead (43) front end top surface tapers slightly, cutterhead (43) The hollow muddy water storehouse (47) of Inner Constitution, the position of muddy water storehouse (47) interior respective drive (46) is equipped with mud guiding plate (48), mud Slurry enters muddy water storehouse (47) from the surrounding of mud guiding plate (48) by the centre bore of drive shaft (46), avoids mud from drive shaft (46) Centre bore be immediately discharged to slurry outlet (45), slurry outlet (45) be arranged before the front end of cutterhead (43), slurry outlet (45) End is equipped with rotary joint (49), the front end connecting conduit (3) of rotary joint (49), and the centre bore of conduit (3) is that mud discharge is logical Road, when cutterhead (43) rotates, slurry outlet (45) is rotated with, and rotary joint (49) and conduit (3) do not turn, before cutterhead (43) End top surface, which is equipped with, cuts native knife (50) and slag input hole (51), and piggyback pod (41) rear end is connect with casing (5) using tapered thread.

2. small diameter tube plastic drain-pipe jacking construction equipment according to claim 1, it is characterized in that: the casing (5) For outer diameter steel round tube identical with piggyback pod (41) outer diameter, 1.0~2.0m of every section length, the piggyback pod of casing (5) and front end (41) using being threadedly coupled and between casing (5) section and section, screw thread is tapered thread, the modeling of the internal diameter of casing (5) than jacking The material draining big 20~50mm of pipe outside diameter.

3. small diameter tube plastic drain-pipe jacking construction equipment according to claim 1, it is characterized in that: the pulp feeding system (6) and dreg removing system (7) constitute head (4) slurry-water balance type system and push pipe be unearthed system, using it is laggard it is preceding go out by the way of； Pulp feeding system (6) includes mud pit (10), slush pump (11), flow inlet (12), in piggyback pod (41) interior flow inlet (12) and mud Entrance (44) connection is starched, dreg removing system (7) includes conduit (3), pressure-regulating valve (13), slag bucket (14), scum pipe (15), deslagging Pump (16), detritus tank (17)；The mud of stock tank (10) is injected using slush pump (11) by flow inlet (12), mud entrance (44) Hydraulic motor (42) enters the muddy water storehouse (47) of cutterhead (43) from the centre bore of the drive shaft (46) of hydraulic motor (42), is leading It is uniformly filled under the action of mud plate (48) muddy water storehouse (47), mud pressure comes balancing earth pressure power and groundwater pressure, cutterhead (43) The soil that rotary cutting soil knife (50) is cut enters muddy water storehouse (47) by slag input hole (51), mixes with mud and passes through slurry outlet (45), conduit (3), pressure-regulating valve (13) drain into slag bucket (14), and pressure-regulating valve (13) is used to adjust the mud of muddy water storehouse (47) Water balance pressure, the mud containing silt impurity drain into detritus tank (17) precipitating using deslagging pump (16) by scum pipe (15).

4. small diameter tube plastic drain-pipe jacking construction equipment according to claim 1, it is characterized in that: the fuel feed pump (8) and mono- section of oil return pipe (9) 10~20m of length, the two sides of interface are each provided with valve.

5. small diameter tube plastic drain-pipe jacking construction equipment according to claim 3, it is characterized in that: the flow inlet (12) two sides of 10~20m of length, mono- section, interface are each provided with valve.